CN101415093A - Image processing apparatus, image processing method and image display system - Google Patents

Abstract

An image processing device, an image processing method, and an image display system suitable for displaying moving images. The image processing apparatus includes: storage means; output control means; and display control means; wherein, in the case where at least n image display apparatuses or display processing units arranged in the image display apparatuses are provided: the output control means controls the image signal output, so that the image signal is output from the storage device to n image display devices or display processing units frame by frame at a second frame rate equal to 1/n of the first frame rate; and the display control device controls the output corresponding to the n images displaying the image of the image signal of the display device or the display processing unit so that the image corresponding to the image signal output to n image display devices or the display processing unit is shifted from one frame to another by one scan period at the display start time 1/n simultaneously, sequentially displayed in dot-sequential or line-sequential manner at the second frame rate.

Description

Image processing device, image processing method and image display system

This application is a divisional application of the invention patent application with the filing date of June 9, 2005, the application number of 200580001091.X, and the title of "display device and method".

technical field

The present invention relates to an image processing device, an image processing method and an image display system, in particular to an image processing device, an image processing method and an image display system suitable for displaying moving images.

Background technique

There is a need to improve display image quality by improving signal processing techniques and driving techniques for image display devices.

In general, you can improve the image quality of an image by increasing its resolution and smoothing its texture. The amount of information of an image is expressed in units of pixels representing dots (dots) constituting the image. The number of pixels of an image is expressed in the number of horizontal and vertical dots of the image, such as 800×600 or 1024×768. More specifically, the greater the number of pixels (dots), the smoother the texture of the image and the greater the amount of information constituting the image.

In order to display an image at high resolution, there is a technique (for example, refer to Patent Document 1) by using, for example, two displays 1 and 2 so that display 1 displays an image in normal single mode, and using The respective displays 1 and 2 display left and right halves of an image, respectively, thereby displaying an image in a multi-mode with a twice higher resolution than a system using only one display.

[Patent Document 1] Japanese Patent Application Publication No. Hei-10-124024

If an image is displayed at an increased resolution, the amount of information constituting the image increases, so the amount of data to be transferred to the display 1 or 2 increases, and the data transfer rate needs to be increased. Therefore, the system is configured to perform transmission of image data without increasing the data transmission rate by reducing the amount of data per point of the displays 1 and 2 and performing conversion of the reduced data by signal processing.

Also, in particular, the image quality of moving images can be improved by increasing the frame rate, where the frame rate is the number of times the screen is updated per second.

For example, when a moving image is projected and displayed on a screen by using a projector, the projector displays frame images line by line by performing horizontal scanning on a line-by-line basis, and after scanning all the lines of one image frame, starts Image data of subsequent frames are scanned, thereby displaying a moving image.

Contents of the invention

[Problems to be Solved by the Invention]

As described above, in particular, the image quality of moving images can be improved by increasing the frame rate. However, in order to perform display processing according to a high frame rate, the processing speed of a driving circuit for driving a display device needs to be increased, and furthermore, the reaction speed of a light quantity modulation element that determines image intensity needs to be increased. This method is technically difficult and leads to increased costs.

Although it is known that the image quality of moving images can be improved by increasing the frame rate, it is practically impossible to study the relationship between the frame rate and the image quality of moving images in the case of increasing the frame rate. Therefore, it is unclear whether it is possible to increase the image quality of moving images to an infinite extent by increasing the frame rate to an infinite extent.

Of course, it is impossible to quantitatively understand the relationship between the frame rate and the moving image in the case of increasing the frame rate.

Therefore, the present inventors paid attention to the frame rate of the next-generation digital cinema format, and studied its necessary limit in terms of visual characteristics.

Previously it was thought that tracking eye movements, known as smooth pursuit, matched the speed of movement of visual objects. Westheimer has stated that the eye moves at the same speed as the speed of the visual object no higher than 30 deg/s (Westheimer, G., A.M.A. Arch. Ophthal. 52, pp. 932-941, 1954).

However, subsequent studies have demonstrated that the speed of tracking eye movements is in almost all cases less than that of the visual target. Meyer et al. have stated that the eye tracking speed is about 0.87 times the speed of the visual object. (Meyer, C.H. et al., Vision Res. Vol. 25, No. 4, pp. 561-563, 1985).

Although Meyer has reported that a maximum tracking speed limit of 100 deg/s was achieved, Meyer stated that such tracking speeds were obtained from skilled test subjects and that normal test subjects were not capable of such tracking. The condition of this experiment was a visual distance of 80 cm, which is greatly different from the visual environment of a movie theater. The visual target is a spot of light moved by a galvanometer, and Meyer does not discuss the spatial frequency of the visual target.

In Japan, there is an example of an NHK report discussing the frame rate (Yasushi Tadokoro et al., NHK Technical Report, September (1968), pp422-426, 1968), but the conditions of the report are visual distance 7H (H: screen height), maximum brightness 30fl (102.78cd/m ² ) for a 14" monitor, and still not considering cinema conditions. In addition, the report concludes that field rates of 60 Hz or higher are unnecessary since large motion does not occur in typical content. Miyahara's experimental conditions for dynamic visual sensitivity with respect to a vibrating visual target were a 14-inch monitor, a visual distance of 4H, and a maximum luminance of 400 cd/m ² . Experiments on visual characteristics are mainly carried out under visual environment conditions such as relatively short distance and relatively high brightness.

Therefore, the present inventors conducted experimental studies on the dynamic spatial frequency characteristics of the eye in the visual environment of a movie theater, namely, a maximum luminance of 40 cd/m ² and a visual distance of 5 to 15 m. Research on moving image quality depending on such dynamic spatial frequency characteristics is important because such research leads to great consideration of conventional formats for frame rates.

In the course of this research, the present inventors actually studied the relationship between frame rate and moving image quality in higher frame rates, and confirmed human visual characteristics.

The present invention has been made in view of the above circumstances, and aims to make it possible to present a moving image with less degradation to an observer, which is the key to viewing a displayed moving image, based on the characteristics of human vision, without having to increase the frame rate. people.

[Ways to solve the problem]

An image processing apparatus for processing an image signal to be displayed by an image display apparatus, the image processing apparatus comprising: storage means for storing a supplied image signal having a first frame rate; output control means for controlling the image an output of a signal to a plurality of image display devices or a plurality of image signal display processing units arranged in the image display device; and display control means for controlling display of an image corresponding to the image signal output under the control of the output control means ; wherein, in the case where at least n image display devices or display processing units arranged in the image display device are provided: the output control means controls the output of the image signal so that the image signal is equal to 1/nth of the first frame rate Two frame rates are output from the storage device frame by frame to n image display devices or display processing units; An image of an image signal to n image display devices or display processing units in a dot-sequential or line-sequential manner at a second frame rate while moving from one frame to another by 1/n of a scanning period at the display start moment displayed in sequence.

A method of processing an image signal to be displayed by an image display device in an image processing device including a storage unit, the method comprising: controlling a storage control step of storing an image signal having a first frame rate in the storage unit; controlling an output image An output control step of a signal to a plurality of image display devices or a plurality of display processing units arranged in the image display device; and a display control step of controlling the display of an image corresponding to the image signal; wherein, at least n image display devices are provided in the presence Or in the case of a display processing unit arranged in an image display device: in the output control step, the output control means controls the output of the image signal so that the image signal is frame by frame at a second frame rate equal to 1/n of the first frame rate output from the storage means to n image display devices or display processing units; and in the display control step, controlling display of an image corresponding to the image signal output to n image display devices or n display processing units in the output control step , so that an image corresponding to image signals output to n image display devices or n display processing units is moved at the second frame rate while moving by 1/n of one scanning period from one frame to another at the display start moment Displayed sequentially in point order or line order.

An image display system, comprising: an image processing device for processing an image signal; and an image display device for displaying the image signal processed by the image processing device; wherein: the image processing device includes: a storage device for storing provided An image signal having a first frame rate; output control means for controlling the output of the image signal stored in the storage means to the image display device; and display control means for controlling display by the image display device corresponding to the output control means An image of an output image signal; the image display device includes: a plurality of image display processing means for providing images in a dot-sequential or line-sequential manner, and a display means for displaying the images provided by the image display processing means; providing at least n image display processing device; the output control device controls the output of the image signal so that the image signal is output to n image display processing devices frame by frame at a second frame rate equal to 1/n of the first frame rate; and the display control device controls the corresponding for displaying images of image signals output to n image display processing devices so that images corresponding to image signals output to n image display processing devices are shifted from one frame to another by one scan period at the display start time 1/n simultaneously, sequentially displayed in dot-sequential or line-sequential manner at the second frame rate.

An image display system, comprising: an image processing device for processing an image signal; and a plurality of image display devices for displaying the image signal processed by the image processing device; wherein: the image processing device includes: a storage device for storing An image signal with a first frame rate is provided; output control means for controlling output of the image signal stored in the storage means to the image display device; and display control means for controlling display by the image display device corresponding to the output by the image display device An image of an image signal output by the control means; each image display device includes: an image display processing device for providing an image in a dot sequential manner or a line sequential manner; providing at least n image display devices; the output control means controls the output of the image signal , so that the image signal is output to n image display devices frame by frame at a second frame rate equal to 1/n of the first frame rate; and the display control means controls the display of images corresponding to the image signals output to the n image display devices , so that images corresponding to image signals output to n image display devices are moved in dot order or line order at the second frame rate while moving from one frame to another by 1/n of a scanning period at the display start time methods are displayed in sequence.

An image processing device for processing an image signal to be displayed by an image display device, the image processing device comprising: separating means for separating a supplied image signal having a first frame rate frame by frame into a plurality of sub-image signals; A plurality of storage means for storing the respective separated sub-image signals output by the separation means; output control means for controlling the respective sub-image signals stored in the plurality of storage means to a plurality of image display devices or arranged in the image outputs of a plurality of image display processing units in the display device; and display control means for controlling display of an image corresponding to a total image signal formed by all sub image signals whose output is controlled by the output control means ; Wherein, in the case of providing at least n image display devices or display processing units: the separation means separates the image signal into n sub-image signals; n storage means are provided; the output control means controls the output of the sub-image signals so that the sub-image signals Image signals are output to n image display devices or display processing units frame by frame at a second frame rate equal to 1/n of the first frame rate from respective n storage devices; The display of the image of the image signal composed of all the sub-image signals of the image display device or display processing unit, so that the image corresponding to the sub-image signal output to n image display devices or n display processing units starts from a Frame to frame shifted by 1/n of a scan period, sequentially displayed in a dot-sequential or line-sequential manner at a second frame rate.

A method of processing an image signal to be displayed by an image display device in an image processing device including a plurality of storage units, the method comprising: separating a supplied image signal having a first frame rate into a plurality of sub-image signals on a frame-by-frame basis Separating step; controlling the storage control step of storing each separated sub-image signal output in the separating step into a plurality of storage units; controlling each sub-image signal stored in the storage unit to a plurality of image display devices or a plurality of arrangements in an output control step of an output of an image display processing unit in the image display device; and a display control step of controlling display of an image corresponding to a total image signal formed by all sub image signals whose output is at the output control step In the control; wherein, in the case of providing at least n image display devices or display processing units: in the separation step, the image signal is separated into n sub-image signals; n storage devices are provided; in the output control step, the control is in the storage outputting the sub-image signals stored in the n storage means in the control step so that the sub-image signals are output frame by frame to the n images from the respective n storage means at a second frame rate equal to 1/n of the first frame rate a display device or a display processing unit; and in the display control step, controlling display of an image corresponding to an image signal composed of all sub-image signals output to n image display devices or display processing units in the output control step so as to correspond to The image of the sub-image signal output to n image display devices or display processing units is shifted by 1/n of a scanning period from one frame to another at the second frame rate in dot sequence or line at the display start moment The sequence mode is displayed one by one.

An image display system, comprising: an image processing device for processing an image signal; and an image display device for displaying the image signal processed by the image processing device; wherein: the image processing device includes: a separation device for frame by frame The provided image signal with the first frame rate is divided into a plurality of sub-image signals; a plurality of storage devices are used to store the separated sub-image signals output by the separation device; output control means are used to control storage in a plurality of storage devices The output of each sub-image signal in the device to a plurality of image display devices; and display control means for controlling the display of an image corresponding to a total image signal formed by all sub-image signals, the output of which sub-image signal is output by The control means controls; the image display device includes: a plurality of image display processing means for providing images in a dot sequential manner or a line sequential manner; and a display means for displaying images provided by the image display processing means; providing at least n images display processing means; the separation means separates the image signal into n sub-image signals; n storage means are provided; the output control means controls the output of the sub-image signals so that the sub-image signals are from the respective n storage means at a rate equal to the first frame rate The second frame rate of 1/n is output to n image display processing devices frame by frame; and the display control device controls the display of the image corresponding to the image signal composed of all the sub image signals output to the n image display processing devices, making an image corresponding to sub-image signals output to n image display processing devices in dot order or line at a second frame rate while moving from one frame to another by 1/n of one scanning period at the display start time The sequence mode is displayed one by one.

An image display system, comprising: an image processing device for processing an image signal; and a plurality of image display devices for displaying the image signal processed by the image processing device; wherein: the image processing device includes: a separation device for step by step The image signal with the first frame rate provided by the frame is separated into a plurality of sub-image signals; a plurality of storage devices are used to store the separated sub-image signals output by the separation device; output control means are used to control the sub-image signals stored in the multiple output of each sub-image signal in a storage means to a plurality of image display devices; and display control means for controlling the display of an image corresponding to the total image signal formed by all the sub-image signals, the output of the sub-image signal Controlled by output control means; each image display device includes: image display processing means for providing images in a dot-sequential manner or a line-sequential manner; providing at least n image display devices; the separation means separates the image signal into n sub-image signals ; n storage devices are provided; the output control device controls the output of the sub-image signal, so that the sub-image signal is output to n image displays frame by frame at a second frame rate equal to 1/n of the first frame rate from each of the n storage devices processing means; and the display control means controls the display of the image corresponding to the image signal composed of all the sub image signals output to the n image display processing means so that the image corresponding to the sub image signal output to the n image display processing means The displays are sequentially displayed in a dot-sequential or line-sequential manner at the second frame rate while shifting the display start moment from one frame to another by 1/n of a scanning period.

The first display device of the present invention is characterized by comprising: a display control part for controlling display so that the display part displays a moving image composed of not less than 105 frames/second; and a display part for controlling based on the display control part Instead, a moving image composed of not less than 105 frames/second is displayed in which the display of each pixel on the screen is maintained during each frame period.

The display control section controls display so that the display section displays a moving image composed of not less than 230 frames/second, and the display section is capable of displaying a moving image composed of not less than 230 frames/second based on the control of the display control section.

The display control part controls the display so that the display part displays the moving image composed of not more than 480 frames/second, and the display part can display the moving image composed of not more than 480 frames/second based on the control of the display control part.

The display control section controls display so that the display section displays a moving image composed of 120 frames/second, and the display section can display the moving image composed of 120 frames/second based on the control of the display control section.

The display control section controls the display so that the display section displays the moving image composed of 240 frames/second, and the display section can display the moving image composed of 240 frames/second based on the control of the display control section.

The display control section controls the display so that the display section displays the moving image composed of 250 frames/second, and the display section can display the moving image composed of 250 frames/second based on the control of the display control section.

The display control section controls display so that the display section displays a moving image composed of 360 frames/second, and the display section can display the moving image composed of 360 frames/second based on the control of the display control section.

The first display method of the present invention is a display method for a display device equipped with a display section in which display of each pixel on the screen is maintained during each frame period, and the method is characterized by It includes a display control step: controlling the display so that the display part displays a moving image composed of not less than 105 frames per second.

In the display control step, the display is controlled so that the display means displays a moving image composed of not less than 230 frames/second.

In the display control step, the display is controlled so that the display means displays a moving image composed of not more than 480 frames/second.

In the display control step, the display is controlled so that the display means displays a moving image composed of 120 frames/second.

In the display control step, display is controlled so that the display means displays a moving image composed of 240 frames/second.

In the display control step, display is controlled so that the display means displays a moving image composed of 250 frames/second.

In the display control step, the display is controlled so that the display means displays a moving image composed of 360 frames/second.

The second display device of the present invention is characterized by comprising: a display control part for controlling display so that the display part displays a moving image composed of not less than 105 frames/second; and a display part for controlling based on the display control part And to display a moving image composed of not less than 105 frames/second, the display part is matrix-driven.

The display control section controls display so that the display section displays a moving image composed of not less than 230 frames/second, and the display section is capable of displaying a moving image composed of not less than 230 frames/second based on the control of the display control section.

The display control part controls the display so that the display part displays the moving image composed of not more than 480 frames/second, and the display part can display the moving image composed of not more than 480 frames/second based on the control of the display control part.

The display control section controls display so that the display section displays a moving image composed of 120 frames/second, and the display section can display the moving image composed of 120 frames/second based on the control of the display control section.

The display control section controls the display so that the display section displays the moving image composed of 240 frames/second, and the display section can display the moving image composed of 240 frames/second based on the control of the display control section.

The display control section controls the display so that the display section displays the moving image composed of 250 frames/second, and the display section can display the moving image composed of 250 frames/second based on the control of the display control section.

The display control section controls display so that the display section displays a moving image composed of 360 frames/second, and the display section can display the moving image composed of 360 frames/second based on the control of the display control section.

The second display method of the present invention is a display method for a display device equipped with a matrix-driven display section, and is characterized by including a display control step of controlling display so that the display section displays a frame composed of not less than 105 frames/second. moving image.

In the display control step, the display is controlled so that the display means displays a moving image composed of not less than 230 frames/second.

In the display control step, the display is controlled so that the display means displays a moving image composed of not more than 480 frames/second.

In the display control step, the display is controlled so that the display means displays a moving image composed of 120 frames/second.

In the display control step, display is controlled so that the display means displays a moving image composed of 240 frames/second.

In the display control step, display is controlled so that the display means displays a moving image composed of 250 frames/second.

In the display control step, the display is controlled so that the display means displays a moving image composed of 360 frames/second.

In the first display device and the first display method according to the present invention, the display is controlled so that a moving image composed of not less than 105 frames/second is displayed by a display part in which the screen is kept during each frame period on the display of each pixel.

In the second display device and the second display method according to the present invention, the display is controlled so that the matrix-driven display means displays a moving image composed of not less than 105 frames/second.

[Advantages of the present invention]

As described above, according to the present invention, it is possible to present a less degraded moving image to a viewer, who is a person watching a displayed moving image, based on human visual characteristics without having to increase the frame rate.

Description of drawings

[ Fig. 1 ] A block diagram for explaining a first configuration example of an image display system to which the present invention is applied.

[ Fig. 2 ] A diagram for explaining the timing of an input video signal and an output video signal.

[ Fig. 3 ] A view for explaining a configuration example of the image display device shown in Fig. 1 .

[ Fig. 4 ] A diagram for explaining an update rate of an edge portion of a moving image displayed on the image display device shown in Fig. 3 .

[ Fig. 5 ] A flowchart for explaining display control processing 1 to be executed by the image display system shown in Fig. 1 .

[ Fig. 6 ] A block diagram for explaining a second configuration example of an image display system to which the present invention is applied.

[ Fig. 7 ] A flowchart for explaining display control processing 2 to be executed by the image display system shown in Fig. 6 .

[ Fig. 8 ] A diagram for explaining the timing of an input video signal and an output video signal.

[ Fig. 9 ] A view showing an example of an actual scene in which moving objects and stationary objects coexist together.

[ Fig. 10 ] Views for explaining fixation conditions.

[Fig. 11] A view for explaining trace conditions.

[ Fig. 12 ] Views for explaining recognition of observers during tracking and gaze.

[FIG. 13A-D] Views for explaining the recognition of the observer under the image capture condition, under the display condition, and under the observation condition.

[ Fig. 14 ] Views for explaining strobe artifacts.

[ FIGS. 15A-D ] Views for illustrating observer recognition at a high frame rate under image capture conditions, under display conditions, and under observation conditions.

[ Fig. 16 ] Views for explaining the results of evaluating moving image quality in terms of jerkiness.

[ Fig. 17 ] Views for explaining the results of evaluating moving image quality in terms of motion blur.

[ Fig. 18 ] A view for explaining a configuration example of a projector and a screen, where n is a number other than 2.

[ Fig. 19 ] A view for explaining the timing of an input video signal and an output video signal, where m=240 and n=4.

[ Fig. 20 ] A view for explaining the timing of an input video signal and an output video signal, where m=250 and n=5.

[ Fig. 21 ] A diagram for explaining the configuration of an image display system 101 using an LCD.

[label description]

1...image display system, 11...image signal conversion device, 12...image display device, 21...A/D conversion section, 22...synchronization signal detection section, 23...frame memory , 24...controller, 25...D/A conversion part, 27...display control part, 41...scanning control part, 43...display part, 71...image display system, 81 ...image signal conversion section, 91...data separation section, 92...data storage section, 94...controller, 93...frame memory, 101...image display system, 111... Signal processing section, 112...clock/sampling pulse generation section, 113...image display device, 121...Y/C separation/chroma decoding section, 122...A/D conversion section, 124.. . Synchronous signal detection part, 125 ... control signal generation part, 131 ... LCD, 133-1 to 133-4 ... data line driving circuit, 134 ... gate line driving part, 141 ... Liquid crystal element, 142...TFT, 143...capacitor.

Detailed ways

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a block diagram showing the configuration of an image display system 1 to which the present invention is applied. The image display system 1 includes an image signal conversion device 11 and an image display device 12 . The image display system 1 is configured to supply thereto an analog image signal corresponding to a moving image, process the image signal in the image signal converting device 11, and supply the processed image signal to the image display device 12 so as to display the moving image image.

The analog image signal supplied to the image signal conversion device 11 is supplied to the A/D conversion section 21 and the synchronization signal detection section 22 .

The A/D conversion section 21 converts an analog image signal having a frame rate m into a digital image signal, and supplies the digital image signal to the frame memory 23 . The synchronization signal detection section 22 detects the frame rate and dot clock of the image signal from the image signal, and generates a vertical synchronization signal and the dot clock signal, and supplies the vertical synchronization signal and the dot clock signal to the controller 24 . A dot clock is the reciprocal of the time it takes to show a dot on the display.

The controller 24 is supplied with a vertical synchronization signal and a dot clock signal from the synchronization signal detection section 22, and controls the video signal output from the frame memory 23, and supplies information associated with the video signal output from the frame memory 23 to the display control Section 27. The frame memory 23 outputs the supplied digital image signal to the D/A conversion section 25 - 1 or the D/A conversion section 25 - 2 based on the control of the controller 24 .

The video signal input and output of the frame memory 23 under the control of the controller 24 will be described below with reference to FIG. 2 .

Assume that m represents the frame rate of the input video signal S1 input to the frame memory 23 . It is also assumed that the frames sequentially input to the frame memory 23 are α frame, α+1 frame, α+2 frame, . . . . When the α frame and α+1 frame are sequentially input to the frame memory 23, the controller 24 controls the frame memory 23 so that the α frame is used as the output video signal at a frame rate equal to 1/2 of the frame rate of the input video signal S1 S2 is output to the D/A conversion section 25-1, and so that at the supply start time b delayed by 1/m from the supply start time a of the α frame, the α+1 frame is output to the D/A conversion section as the output video signal S3 25-2.

The period of time taken to supply the α frame to the D/A conversion section 25-1 is 2/m, and the supply end time c is 1/m later than the supply start time b of the α+1 frame to the D/A conversion section 25-2. m. After the α+1 frame, the α+2 frame and the α+3 frame are sequentially input to the frame memory 23, and the controller 24 controls the frame memory 23 so that continuously (that is, at the supply time c) with the supply of the α frame, At a frame rate equal to 1/2 of the frame rate of the input video signal S1, α+2 frames are supplied to the D/A conversion section 25 as the output video signal S2. Similarly, the controller 24 supplies α+3 frames as the output video signal S3 to D at a supply start time d delayed by 1/m from the supply start time c of α+2 frames and equal to the supply end time of α+1 frames. /A converts part 25-2.

The supply timing offset between the output video signal S2 and the output video signal S3 is determined by the vertical synchronization signal of the input video signal S1. More specifically, as shown in FIG. 2, the time period between the supply start time a of the output video signal S2 and the supply start time f of the output video signal S3 is equal to one frame period of the input video signal S1. Based on the vertical synchronization signal supplied from the synchronization signal detection section 22, the controller 24 controls supply timing of the output video signal S2 to the D/A conversion section 25, and supply timing of the output video signal S3 to the D/A conversion section 25-2.

Therefore, the controller 24 controls the frame memory 23 so that the output video signal S2 and the output video signal S2 are respectively transferred alternately on a frame-by-frame basis at a frame rate m/2 equal to 1/2 of the frame rate m of the input video signal S1. The signal S3 is supplied to the D/A conversion section 25-1 and the D/A conversion section 25-2 in such a manner that the supply start time of each frame of one of the output video signals S2 and S3 is relative to that of the other. The supply start time of each frame is offset by half (1/m) of the outputted one-frame supply time (2/m).

Returning to the description of the image display system 1 shown in FIG. 1 .

The D/A conversion section 25 - 1 converts the supplied digital image signal into an analog image signal, and supplies the analog image signal to the scan control section 41 - 1 of the image display device 12 . The D/A conversion section 25 - 2 converts the supplied digital image signal into an analog image signal, and supplies the analog image signal to the scan control section 41 - 2 of the image display device 12 .

Based on the information supplied from the controller 24, the display control section 27 controls the moving image display of the image display device 12 so that frame images corresponding to the output video signals S2 and S3 are displayed at a timing similar to that described above with reference to FIG. .

As described above with reference to FIG. 2, the frame rate of each of the output video signal S2 and the output video signal S3 is equal to 1/2 of the frame rate of the input video signal S1. More specifically, the dot clock of each of the output video signal S2 and the output video signal S3 is equal to 1/2 of the dot clock of the input video signal S1. Based on the information associated with the video signal output from the frame memory 23 and supplied from the controller 24, the display control section 27 performs control so that each of the output video signal S2 and the output video signal S3 displayed on the image display device 12 The dot clock becomes equal to 1/2 of the dot clock of the input video signal S1.

Driver 28 may be connected to controller 24 if desired. A magnetic disk 31, an optical disk 32, a magneto-optical disk 33, or a semiconductor memory 34 is installed in the drive 28 to transmit and receive information.

The image display device 12 is supplied with the two-line analog video signal converted by the image signal conversion device 11, and displays a moving image on the basis of the control of the display control part 27 by using the scan control part 41-1 and the scan control part 41-2. on the display part 43.

The scan control section 41-1 is supplied with an analog video signal corresponding to the output video signal S2, which is read from the frame memory 23 at the timing described above with reference to FIG. -1 to convert it to an analog signal. Similarly, the scan control section 41-2 is supplied with an analog video signal corresponding to the output video signal S3, which is read from the frame memory 23 at the timing described above with reference to FIG. The conversion section 25-2 converts it into an analog signal.

The scan control section 41-1 and the scan control section 41-2 display the respective supplied analog video signals on the display section 43 by a dot-sequential or line-sequential scanning method. At this time, the scanning control section 41-1 and the scanning control section 41-2 can alternately scan consecutive frames while shifting the scanning start time of each consecutive frame by 1/2 frame relative to the scanning start time of the subsequent frame, thereby Image display is performed on the display section 43 at a frame rate twice the frame rate at which image drawing is performed by the scan control section 41-1 or the scan control section 41-2 alone.

The image display device 12 may be configured not only as a single device but also as an image display system composed of a plurality of devices. If the image display device 12 is configured as an image display system, the image display system may be composed of a projector 51 - 1 , a projector 51 - 2 and a screen 52 as shown in FIG. 3 , for example.

The specific operation of the image display device 12 will be described below with reference to the example shown in FIG. 3 using the projector 51 - 1 , the projector 51 - 2 and the screen 52 . Projector 51-1 corresponds to scan control section 41-1 in FIG. 1, projector 51-2 corresponds to scan control section 41-2 in FIG. 1, and screen 52 corresponds to display section 43 in FIG.

For example, projector 51-1 is supplied with an analog video signal corresponding to output video signal S2, which is read from frame memory 23 at the timing described above with reference to FIG. -1 to convert it to an analog signal. Similarly, the projector 51-2 is supplied with an analog video signal corresponding to the output video signal S3, which is read from the frame memory 23 at the timing described above with reference to FIG. 25-2 to convert it into an analog signal.

At the timing based on the control of the display control section 27, each of the projector 51-1 and the projector 51-2 passes from pixel (X, Y)=(0, 0) to pixel (X, Y)=(p , q) Scan the screen 52 in the horizontal direction to display the frame image corresponding to the provided video signal, wherein from pixel (X, Y)=(0,0) to pixel (X, Y)=(p, q ) form the image to be displayed. The frame rate of the frame image displayed by each of the projector 51-1 and the projector 51-2 is m/2. As in the case of the output video signal S2 and the output video signal S3 described above with reference to FIG. A display frame is offset by 1/2, and the phase difference between its scans is 1/m.

For example, when projector 51-2 scans the line on screen 52 corresponding to α+1 frame on the line represented by scan B, projector 51-1 scans the line on screen 52 corresponding to α+1 frame on the line represented by scan A. 2 frames corresponding to the row. The line indicated by scan B is a line shifted by 1/2 the number of lines of one frame from the line indicated by scan A. More specifically, the moving image displayed on the screen 52 is alternately rewritten by scanning A and scanning B at intervals of 1/m.

For example, if the frame rate of display images output from each of projector 51-1 and projector 51-2 is 150 Hz, the frame rate of moving images displayed on the screen becomes substantially 300 Hz.

In addition, in order to prevent deviations between scan lines formed at the same position by the corresponding one of scan A and scan B, it is possible to correct the optical position of the image by using a method similar to that used in the conventional so-called twin stack technique. technology that corrects the scanning position of pixels. Dual-stack technology is a technology capable of displaying bright images by using two projectors to display the same image at the same position at the same time. When images are displayed by using dual stack technology, the brightness of displayed images becomes twice as high, enabling clear projection even in bright environments or with long projection distances.

The use of the double-stacking technique causes the problem that image blurring occurs due to the deviation between the pixel positions of the two projected images, but a so-called frame shift function capable of fine-tuning the pixel positions of the optically projected images is widely used to solve such problems. The problem. With the screen shift function, the positions of the images projected from the two projectors can be precisely aligned with each other.

For example, a technique of correcting a deviation between pixel positions of two projected images is disclosed in Japanese Patent Application No. Hei 10-058291.

By adjusting the image display device 12 so that the deviation between the scan lines formed by scan A and scan B becomes not more than one pixel (one dot or one pixel), the image display device 12 becomes capable of displaying moving images without Image blur due to overlapping of images offset by one frame from each other.

As described above, in the case where the projector 51-1 and the projector 51-2 alternately draw frame images on a frame-by-frame basis while shifting each frame image by 1/2 frame from the subsequent frame image, by One of the projectors starts scanning for drawing a frame's image earlier than the preceding frame where scanning and drawing is completed by the other projector. At this time, when the object C displayed on the screen 52 of FIG. 3 is displayed, for example, moving from left to right on the display screen, the smoothness of the motion of the edge portion β is perceived as smoothness of the displayed image by the user who observes the moving image. .

The display of the edge portion β of the object C on the screen 52 will be described below with reference to FIG. 4 .

The object C of α frames is displayed by the projector 51-1, and after a period of 1/m second, the object C of α+1 frames is displayed by the projector 51-2. After the 1/m period from the α frame display, the position of the edge portion β of the object C at that time is rewritten. Then, after 1/m period, the object C of α+2 frames is displayed by the projector 51-1. The edge portion β of the object C is rewritten after 1/m period from α+1 frame display.

For example, when the frame rate of the display image output from each of projector 51-1 and projector 51-2 is 150 Hz, at intervals of 1/150 (second), rewrite the A frame of a moving image displayed by each individual projector in the instrument 51-2. However, the edge portion β of object C, which is displayed on on screen 52. Therefore, the movement of the edge portion β of the object C observed by the user becomes very smooth.

The image display device 12 has been described as being configured to control the display of images under the control of the display control device 27 . However, in order to control the operations of projector 51-1 and projector 51-2 as described above with reference to FIG. Control signals necessary for image display, or may have a control section different from the display control section 27 inside so as to be supplied with a vertical synchronization signal and a dot clock signal from the display control section 27 .

The operation of the image display device 12 has been described above with illustrative reference to the projection display system constituted by the projector 51 - 1 , the projector 51 - 2 and the screen 52 . However, the image display device 12 may use any other display system capable of drawing images by dot sequential or row sequential methods, as long as the display system can make two display devices alternately scan continuous frames with a 1/2 frame offset, And it is sufficient that the display of the moving image is performed at a frame rate twice as high as that of each individual display device of the two display devices.

The image display device 12 may use a device that performs image drawing by a dot sequential or row sequential method, for example, using a CRT (cathode ray tube), LCD (liquid crystal display), GLV (grating light valve), LED (light emitting diode) or FED (field emissive displays) direct-view displays or projectors.

For example, GLV is an image display technology using a micro ribbon array which is a projection device for controlling the direction, color, etc. of light by using a light diffraction effect. The microstrip array includes microscopic light diffraction devices arranged in rows, and the GLV performs projection of images by irradiating laser light onto the microstrip array. Ribbons can be independently driven by electrical signals, and the driving amount of each ribbon can be adjusted so as to change the amount of light diffraction and produce light and dark in an image by means of a difference between each ribbon. Therefore, GLV can achieve smooth grayscale representation and high contrast.

LEDs are devices formed from nodes of two semiconductors and are capable of emitting light when an electric current is applied.

The FED is a device capable of obtaining images by an emission principle similar to a CRT, which emits light by taking electrons from a cathode and causing the electrons to collide with a fluorescent material covering an anode. However, a cathode of a CRT has a structure using a point electron source, whereas a cathode of an FED has a structure using a planar electron source.

The display control process 1 to be executed by the image display system 1 shown in FIG. 1 will be described below with reference to the flowchart shown in FIG. 5 .

In step S1 , the sync signal detecting section 22 detects a sync signal and a dot clock from the supplied analog video signal, and supplies the vertical sync signal and the dot clock signal to the controller 24 .

In step S2 , the A/D conversion section 21 performs A/D conversion of the supplied analog video signal, and supplies the digital video signal to the frame memory 23 .

In step S3, the frame memory 23 sequentially stores the supplied digital video signals.

In step S4, as described above with reference to FIG. 2, according to the control of the controller 24, the frame memory 23 alternates on a frame-by-frame basis at a frame rate corresponding to an output dot clock whose rate is half the rate of the input video signal S1. The video signal is output to the two D/A conversion sections 25-1 and 25-2 while shifting each frame relative to the subsequent frame by half of the scanning period required to display one frame. The video signal output to the D/A conversion section 25-1 is the output video signal S2, and the video signal output to the D/A conversion section 25-2 is the output video signal S3.

In other words, the controller 24 controls the frame memory 23 so as to separate the frames stored in the frame memory 23 into odd frames and even frames, and to display each of the odd and even frames offset by one frame relative to the subsequent frame. half of the required scanning period to alternately output the frames to the D/A conversion section 25-1 and the D/A conversion section 25-2.

In step S5 , the D/A conversion section 25 - 1 and the D/A conversion section 25 - 2 perform D/A conversion of the supplied video signal, and supply the analog video signal to the image display device 12 .

In step S6, the display control section 27 controls the scanning control section 41-1 and the scanning control section 41-1 of the image display device 12 at a timing similar to that used in the case of the output video signal S2 and the output video signal S3 described above with reference to FIG. The scan control section 41-2 (in FIG. 3 , the projector 51-1 and the projector 51-2), and shifts the scan start time of each frame relative to the scan start time of the subsequent frame by the time required to display one frame. a period of half of the scanning period, thereby alternately scanning the respective frames of the video signal on a frame-by-frame basis so as to scan at substantially two times the frame rate of each of the scanning control section 41-1 and the scanning control section 41-2. A video image is displayed on the display section 43 (screen 52 in FIG. 3 ) at a double-high display frame rate. The display control section 27 controls the image display device 12 in this manner, and completes the processing.

Through the above-described processing, a moving image to be displayed is separated into odd and even frames, and the odd and even frames are respectively supplied to two display devices. Then, each display device scans the odd and even frames at a frame rate that is half the frame rate of the moving image to be displayed, with an offset of 1/2 frame, so that motion can be displayed at a frame rate that is twice as high as the display device's capability. image.

In addition, by adjusting the scanning position accuracy of two scanning lines so that the positional deviation is not more than one point (one pixel), it is possible to clearly display a moving image without overlap due to images shifted by one frame from each other The image is blurry.

In addition, if each of the projector 51-1 and the projector 51-2 is a so-called liquid crystal projector, a shutter may be provided in front of the projection lens of the projector 51-1, for example, in FIG. 2 , between the supply start time a and the supply start time b, between the supply start time c and the supply start time d, and between the supply start time e and the supply start time f, the shutter is used to display The light of the image projected by the projector 51-1, and in FIG. 2, between the supply start time b and the supply start time c, and between the supply start time d and the supply start time e, the shutter blocks The light of the image projected by the projector 51-1. In addition, shutters may be provided in front of the projection lens of the projector 51-2, for example, in FIG. , the shutter passes the light for displaying the image projected by the projector 51-2, and in FIG. , and between the supply start time e and the supply start time f, the light for displaying the image projected by the projector 51-2 is blocked.

More specifically, the shutter provided in front of the projection lens of the projector 51-1 passes or blocks light for displaying an image projected by the projector 51-1, so that the display is all consistent with the input video signal S1 shown in FIG. Synchronized α frame, α+2 frame, α+4 frame, . . . , only (α+2×n) frames (n is an integer) synchronized with the input video signal S1. The shutter provided in front of the projection lens of the projector 51-2 passes or blocks light for displaying an image projected by the projector 51-2 so as to display α+1 all synchronized with the input video signal S1 shown in FIG. frame, α+3 frame, . . . , only (α+2×n+1) frames (n is an integer) synchronized with the input video signal S1.

In addition, each of the shutters may be a liquid crystal shutter or a mechanical shutter, and only needs to be able to transmit or block light at time intervals of a predetermined cycle.

In addition, each of the shutters may be provided in the projector 51-1 or the projector 51-2, for example, between the light source and the liquid crystal device or behind the liquid crystal device.

FIG. 6 is a block diagram showing the configuration of an image display system 71 to which the present invention is applied and having a different configuration from the image display system 1 shown in FIG. 1 .

The same reference numerals are used to denote parts corresponding to those shown in FIG. 1, and descriptions of the same parts are omitted.

The image display system 71 shown in FIG. 6 causes moving images to be displayed by the image display device 12 similar to that used in the image display system 1 shown in FIG. The signal converting means 81 converts the image signal.

The analog image signal supplied to the image signal conversion device 81 is supplied to the A/D conversion section 21 and the synchronization signal detection section 22 .

The A/D conversion section 21 converts an analog image signal having a frame rate m into a digital image signal, and supplies the digital image signal to the data separation section 91 . The synchronization signal detection section 22 detects the frame rate and the dot clock of the image signal from the image signal, and generates a vertical synchronization signal and the dot clock signal, and supplies the vertical synchronization signal and the dot clock signal to the data separation section 91, the data holding section 92-1 , the data holding section 92-2 and the controller 94.

Based on the vertical synchronizing signal supplied from the synchronizing signal detecting section 22, the data separating section 91 separates the supplied digital image signal into individual frames, and on a frame-by-frame basis, alternately supplies the frames to the data holding section 92-1 or Data Preservation Section 92-2. For example, the data separation section 91 supplies odd frames to the data holding section 92-1, and supplies even frames to the data holding section 92-2.

The data holding section 92-1 serves as an interface between the data separating section 91 and the frame memory 93-1, and the data holding section 92-2 serves as an interface between the data separating section 91 and the frame memory 93-2. Each of the data holding sections 92-1 and 92-1 supplies the supplied image signal to the frame memory 93-1 or the frame memory 93 on a frame-by-frame basis based on the vertical synchronizing signal supplied from the synchronizing signal detecting section 22 -2.

The controller 94 is supplied with a vertical synchronization signal and a dot clock signal from the synchronization signal detection section 22, and controls the output timing of the video signals of the frame memory 93-1 and the frame memory 93-2.

The frame memory 93 - 1 supplies video signals to the D/A conversion section 25 - 1 based on the control of the controller 94 . The frame memory 93 - 2 supplies video signals to the D/A conversion section 25 - 2 based on the control of the controller 94 .

If it is assumed here that the signal supplied to the data separation section 91 is the input video signal S1, the signal output from the frame memory 93-1 is the output video signal S2, and the signal output from the frame memory 93-2 is the output video signal S3, The input-output relationship between these signals is then similar to that described above with reference to FIG. 2 .

2 does not consider signal delays caused by data separation processing in the data separation section 91, etc., but the controller 94 can be adapted to, for example, signal output timing by means of the data holding section 92-1 and the data holding section 92-2, Adjusts the delay of the signal, and the timing skew between two lines of video signals.

The D/A conversion section 25 - 1 converts the supplied digital image signal into an analog image signal, and supplies the analog image signal to the image display device 12 . The D/A conversion section 25 - 2 converts the supplied digital image signal into an analog image signal, and supplies the analog image signal to the image display device 12 .

The display control section 27 controls the moving image display on the image display device 12 based on the information supplied from the controller 94, and displays images corresponding to the output video signal S2 and the output video signal S3 at timings similar to those described above with reference to FIG. 2 . corresponding frame image.

Driver 28 may be connected to controller 24 if desired. A magnetic disk 31, an optical disk 32, a magneto-optical disk 33, or a semiconductor memory 34 is mounted on the drive 28 to transmit and receive information.

Display control processing 1 to be executed by the image display system 66 shown in FIG. 6 will be described below with reference to the flowchart shown in FIG. 7 .

In step S21, the synchronization signal detecting section 22 detects the synchronization signal and the dot clock from the supplied analog image signal, and supplies the vertical synchronization signal and the dot clock signal to the data separation section 91, the data holding section 92-1, the data holding section 92 -2 and controller 94.

In step S22 , the A/D conversion section 21 performs A/D conversion of the supplied analog video signal, and supplies the digital video signal to the data separation section 91 .

In step S23, based on the vertical synchronizing signal supplied from the synchronizing signal detecting section 22, the data separating section 91 separates the supplied analog video signal into individual frames, and alternately supplies the frames to the data holding section on a frame-by-frame basis. 92-1 or data preservation section 92-2. For example, the data separation section 91 supplies odd frames to the data holding section 92-1, and supplies even frames to the data holding section 92-2.

In step S24, each of the data holding section 92-1 and the data holding section 92-2 supplies the supplied video signal to the frame memory 93-1 or the frame memory 93-2, and makes the frame memory 93-1 or the frame memory 93-1 The memory 93-2 stores the supplied video signal.

In step S25, the controller 94 controls the frame memory 93-1 and the frame memory 93-2 so that, on a frame-by-frame basis, at a frame rate corresponding to an output dot clock equal to half the dot clock of the input video signal S1, One frame of the video signal is alternately output from the frame memory 93-1 to the D/A conversion section 25-1 and from the frame memory 93-2 to the D/A conversion section 25-2 while making each frame relative to the subsequent The frame offset shows the period of half the scan period required for one frame. More specifically, if it is assumed here that the signal supplied to the data separation section 91 is the input video signal S1, the signal output from the frame memory 93-1 is the output video signal S2, and the signal output from the frame memory 93-2 is The video signal S3 is output, and the input-output relationship between these signals is similar to that described above with reference to FIG. 2 .

Each of the D/A conversion section 25 - 1 and the D/A conversion section 25 - 2 performs D/A conversion of the supplied video signal and supplies the analog video signal to the image display device 12 at step S26 .

In step S27, the display control section 27 controls the scanning control section 41-1 and the scanning control section 41-1 of the image display device 12 at a timing similar to that used in the case of the output video signal S2 and the output video signal S3 described above with reference to FIG. The scan control section 41-2 (in FIG. 3 , the projector 51-1 and the projector 51-2), and shifts the scan start time of each frame relative to the scan start time of the subsequent frame by the time required to display one frame. a period of half of the scanning period, whereby frames of the video signal are alternately scanned on a frame-by-frame basis so as to be substantially twice the frame rate of each of the scanning control section 41-1 and the scanning control section 41-2 A high display frame rate displays video images on the display section 43 (in FIG. 3, the screen 52). The display control section 27 controls the image display device 12 in this manner, and completes the processing.

Even in the image display system 71 shown in FIG. 6, as in the case of the image display system shown in FIG. Two display devices are provided, that is, a scan control section 41-1 and a scan control section 41-2. Then, each display device scans frame images at a frame rate that is half the frame rate of the moving image to be displayed, with an offset of 1/2 frame, so that motion can be displayed at a frame rate that is substantially twice as high as the capability of the display device. image.

In the above description of the embodiment of the present invention, reference was made to the case in which the supplied image signal is divided into two lines of image signals, and the image is drawn by two scanning control sections, but the number of divisions of the image signal may be any A number less than two.

If the number of divisions of the image signal is, for example, three, the image signal output from the frame memory is sequentially supplied to three D/A conversion sections, or the frames separated into three by the data separation section are sequentially supplied to three frames respectively memory and stored in it. Thus, as shown in FIG. 8, the input video signal S1 is split into three output video signals S2, S3 and S4, and the three output video signals S2, S3 and S4 are respectively supplied to the three scan control sections.

The first scan control section controls the display of α frame, α+3 frame, α+6 frame, . . . , all of which correspond to the output video signal S2. The second scan control section controls the display of α+1 frame, α+4 frame, α+7 frame, . . . , all of which correspond to the output video signal S3. The third scan control section controls the display of α+2 frames, α+5 frames, α+8 frames, . . . , all of which correspond to the output video signal S4. The frame rate of the frame of the output video signal displayed by the first scan control section, the second scan control section, and the third scan control section is 1/3 of the frame rate of the input video signal, and is controlled by the first scan control section, the second scan control section, and the third scan control section respectively. Scan start times of frames scanned by the second scan control section and the third scan control section are shifted from each other by 1/3 of the scan period required to display one frame of each of the output video signals S2 to S4.

If the input video signal S1 is, for example, 180 Hz, the input video signal S1 is separated into three output video signals S2, S3, and S4, and the three output video signals S2, S3, and S4 are provided to three scan control sections, respectively, And it is scanned and displayed as an output video signal at a frame rate of 60 Hz by each scanning control section. If the input video signal S1 is, for example, 150 Hz, the input video signal S1 is separated into three output video signals S2, S3, and S4, and the three output video signals S2, S3, and S4 are provided to three scan control sections, respectively, And it is scanned and displayed as an output video signal at a frame rate of 50 Hz by each scanning control section. In this way, it is possible to use the most widely used type of scan control section at present, which can operate at 50 Hz (PAL: Phase Alternation Line) or 60 Hz (NTSC: National Television System Committee or HD (High Definition) video signal), to display moving images at much higher frame rates.

Although the NTSC frame rate is more correctly 59.94 frames/second, the NTSC frame rate referred to herein is defined as 60 frames/second according to the convention of those skilled in the art. Similarly, multiples of 59.94 are called multiples of 60. More specifically, 59.94, 119.88, 179.82, 239.76, 299.70, 359.64, 418.58, and 479.52 are referred to herein as 60, 120, 180, 240, 300, 360, 420, and 480, respectively.

Therefore, if the number of divisions of the input video signal is, for example, n, n scan control sections are provided, and the frame rate of the frames of the output video signal displayed by the first to nth scan control sections respectively is the frame rate of the input video signal 1/n of the rate. The drawing start times of the frames respectively scanned by the first to n-th scan control sections are shifted from each other by 1/n of the display period of one frame of the respective output video signals, thereby being displayed separately from each of the scan control sections Compared with the case of moving images, moving images can be displayed at a frame rate substantially n times higher.

In addition, the number of scan control sections may be set to s, and the number of separations of video signals may be set to n smaller than s to display a moving image by using n scan control sections among s scan control sections.

In the above description with reference to FIGS. 1 and 6 , reference was made to the image display system each constituted by an image signal conversion device and an image display device, but, of course, each of the constituent elements may be realized as a single device.

The image signal conversion device 11 shown in FIG. 1 was described based on the assumption that the controller 24 controls the frame memory 23 and the display control section 27 controls the image display device 12, while based on the controller 94 controlling the frame memory 93-1 and the frame memory 93-1. 2 and on the assumption that the display control section 27 controls the image display device 12, the image signal conversion device 81 shown in FIG. 6 was described. However, the frame memory for storing video signals and the image display device for displaying images may be controlled by the same controller. The display control section 27 may be provided in the image display device 12 instead of the image signal conversion device 11 or 81 .

Moving images are accompanied by characteristic image degradation that does not appear in still images. In 50Hz (PAL) and 60Hz (NTSC and HD video signals) displays of the most widely used types at present, the reproduction in the time direction is defective, and under certain conditions, this defect in the time direction is eliminated. Converted to defects in spatial orientation. Therefore, image quality degradation of a moving image occurs due to, for example, a shutter cycle for acquiring moving image data, a firing cycle of a display device during displaying a moving image, and a person's line of sight condition.

Fig. 9 shows an example of an actual scene where stationary objects and moving objects coexist together. This scenario assumes the car is moving to the right and the tree is fixed to the ground. 10 and 11 illustrate the identification of observers viewing the scene shown in FIG. 9 .

FIG. 10 is a view showing video image recognition of an observer gazing at a tree. In this case, the car moving to the right is dimly visible to the observer. FIG. 11 is a view showing video image recognition of an observer looking at a car. In this case, the stationary tree is dimly visible to the observer.

In the following description, the case where the observer fixes his/her line of sight on a fixed object in the observation plane coordinates is called the gaze condition, and the case in which the observer makes the line of sight follow the moving object in the observation plane coordinates is called the tracking condition . More specifically, the situation described in connection with FIG. 10 corresponds to a gaze condition, while the situation described in connection with FIG. 11 corresponds to a tracking condition. Under both the gaze condition and the tracking condition, objects gazed at by the observer are clearly visible, while objects whose relative position with respect to the gazed object changes are dimly visible.

The reason for this is that human visual characteristics have a function of integrating light incident on the retina within a specific period. An object moving on the retinal coordinates of the eye shows a comprehensive position change in the time direction, so that the moving object is perceived as a blurred image. This blur is proportional to the speed of motion in retinal coordinates. The speed of motion on the retinal coordinates does not correspond to the actual speed of the object but to its angular speed (degrees/second).

As described above, an object stationary on the retinal coordinates is clearly visible, and an object moving on the retinal coordinates is dimly visible. In order to display moving images with realism, that is, high-quality moving images that appear to be moving smoothly, video images consistent with such actual recognition are important.

The difference between the observer identification described above with reference to FIG. 10 and the observation identification described above with reference to FIG. 11 will be described below with reference to FIG. 12 . The upper part of Fig. 12 shows the actual movement in the external world. The vertical axis represents the time axis, and the horizontal axis represents the horizontal direction, and the upper part of Fig. 12 shows a point at a fixed point (corresponding to the tree in Figs. 9 to 11, and represented by x in Fig. Corresponding to the car in Figures 9 to 11, and denoted by y in Figure 12) exists in the scene in the external world, the position of the point at each time. The lower part of Fig. 12 shows the observer's recognition of motion in the external world during gaze and tracking. Arrows shown in dotted lines indicate the movement of the viewer's point of view, that is, the direction in which video images are integrated on the retina. Arrows extending in the vertical direction indicate the directions integrated during gaze, and arrows extending in the oblique direction indicate the directions integrated during tracking. More specifically, fixed points (trees) are dimly visible when the observer tracks, but moving points (cars) are clearly visible. On the other hand, when the observer gazes, fixed points (trees) are clearly visible, but moving points (cars) are dimly visible.

Recognition of motion in the external world shown in FIG. 9 by an observer when motion captured by a fixed image capturing method is reproduced as a moving image will be described below with reference to FIG. 13 in terms of image capture conditions, display conditions, and observation conditions. The upper part of Fig. 13 shows temporal changes in moving image display. The lower part of FIG. 13 shows the result obtained by integrating light displayed as a moving image in the direction of movement of gaze during gazing and tracking, that is, the direction of the integration axis, as recognition of the observer.

FIG. 13A shows the identification of the observer in the case of an image captured by an open shutter technique and displayed by an impulsive display. Figure 13B shows the identification of the observer in the case of an image captured by the open shutter technique and displayed by a hold-type display. Figure 13C shows the identification of the observer in the case of an image captured by a high-speed shutter technique and displayed by an impulsive display. Figure 13D shows the identification of the observer in the case of an image captured by a high-speed shutter technique and displayed by a hold-type display.

The hold type used here refers to a display type that holds the display of each pixel on the screen during each frame period, and the hold type display is, for example, an LCD. A display device using LED or a display device using EL (Electro Luminescence) can be used as the hold type display.

Impulse displays are, for example, CRTs or FEDs.

In addition, displays are classified not only into hold type (hold type) and pulse type, but also into pixel type displays (for example, displays using LCD or LED and displays using EL) and so-called matrix drive displays in which In a type display, elements are respectively arranged in each pixel, and a so-called matrix-driven display consists of voltages that are individually applied to vertical positions arranged on the screen in units of predetermined lengths and to horizontal positions arranged in units of predetermined lengths on the screen , current and other drives.

As can be seen from FIGS. 13A to 13D , moving image quality degradation is different under different conditions. For example, moving objects observed through tracking in FIGS. 13B and 13D are faintly visible compared to moving object recognition observed through tracking in FIGS. 13 or 13C . This phenomenon is called "motion blur" and is characteristic of displays operating under hold-type emission conditions. "Motion blur" is blurring that occurs in an object that an observer is looking at, and is degradation that is easily felt by the observer.

In addition, degradations such as stroboscopic artifacts (jitter) due to staring in FIG. 3D and stroboscopic artifacts due to tracking in FIGS. 13A and 13C occur. Stroboscopic artifacts refer to moving image degradations that cause the observer to see multiple copies of a moving object (such as a car) at the same time, or as shown in Figure 14, when the observer gazes at a fixed ), the moving object seems to be moving in a non-smooth discrete way. Therefore, in many cases, the stroboscopic artifacts that appear in moving objects being gazed as well as stationary objects being tracked are degradations that occur in a different part from the object being gazed at, and are compared to "motion blur" Not very noticeable. However, when the gaze is not perfectly tracked, the relationship between the gazed object and the gaze becomes the same as that between a moving object and the gaze during gaze, or between a fixed object and the gaze during tracking. In this case, stroboscopic artifacts appear in the object being looked at, so that very noticeable degradation occurs. This phenomenon is noticeable in video sources such as sports broadcasts and action movies where the motion is too fast to easily predict the next motion. During the capture of moving images for movies and the like, various techniques are employed in order to prevent the deterioration of such moving image quality: for example, while a moving object is being tracked by the camera, it is captured by the camera, and the captured object is displayed on the display screen in a state of a fixed object. moving objects, or introduce a blur called motion blur to suppress stroboscopic artifacts. However, the limitations imposed by these techniques lead to limitations on the representation. In addition, these approaches cannot be used for sports etc. because the movement of the object of interest is unpredictable.

According to the angular velocity of the moving object, the above-mentioned moving image quality degradation increases. Therefore, if a moving image of the same video scene is displayed on a display having a larger viewing angle, the quality of the moving image is more significantly degraded. In addition, attempts to increase the resolution hardly improve the above-mentioned degradation of moving image quality. Conversely, higher resolution results in greater improvement in still image quality, so that moving image quality degradation becomes more pronounced. As displays with larger screen sizes and higher resolutions are developed, it is expected that the above-mentioned moving image quality will become a bigger problem in the future.

The reason for the deterioration of moving image quality is lack of temporal reproducibility. Therefore, the basic solution is to improve temporal reproducibility. More specifically, a useful solution is to increase the frame rate for both image capture and display.

The relationship between moving image quality degradation and display types will be described in more detail.

For example, as can be seen from a comparison between FIGS. 13A and 13B , the length of the moving object image visually recognized by tracking in FIG. 13B is longer than the length of the moving object image visually recognized by tracking in FIG. 13A , so that the motion blur felt by the observer following the moving object displayed on the hold type display becomes larger compared with the case of the impulse type display. On the other hand, from the fact that a fixed object is visually recognized as separate images by tracking in FIG. 13A, and a fixed object is visually recognized by tracking in FIG. , it can be seen that fixed objects displayed on hold-type displays are naturally visible during tracking compared to the case of impulse-type displays.

Similarly, as can be seen from a comparison between FIGS. 13C and 13D , the length of the moving object image visually recognized by tracking in FIG. 13D is longer than that of the moving object image visually recognized by tracking in FIG. 13C . length, so that the motion blur perceived by an observer following a moving object displayed on a hold type display becomes larger compared to the case of an impulse type display. On the other hand, from the fact that the fixed object is visually recognized as separate images by tracking in FIG. 13C , while the fixed object is visually recognized by tracking in FIG. , it can be seen that fixed objects displayed on hold-type displays are naturally visible during tracking compared to the case of impulse-type displays.

During tracking, the identification of moving objects and fixed objects shown in Figure 13A is the same as that shown in Figure 13B, and the identification of moving objects and fixed objects shown in Figure 13C is the same as that shown in Figure 13D The identification of moving objects and fixed objects, but the identification of moving objects and fixed objects shown in Figures 13A and 13B is different from the identification of moving objects and fixed objects shown in Figures 13C and 13D. From this fact, it can be seen that the recognition (the way motion blur and stroboscopic artifacts (jitter) occur) during gaze is the same for moving and stationary objects, regardless of whether the display type is pulsed or held. In addition, it can be seen that even by staring at a moving object whose image is captured by an open shutter technique, no stroboscopic artifact (jitter) is perceived, but if staring at a moving object whose image is captured by a high-speed shutter technique , then stroboscopic artifacts (jittering) are perceived.

FIG. 15 shows the degree of improvement in moving image degradation achieved when the moving image data described above with reference to FIG. 13 is captured at twice as high a frame rate and displayed at twice as high a frame rate.

Figure 15A shows the observer's recognition of a moving image captured by an open shutter technique and displayed by an impulse-type display at twice the frame rate as in the case described above with reference to Figure 13 . Figure 15B shows the viewer's recognition of a moving image captured by the open shutter technique and displayed by a hold-type display at twice the frame rate as in the case described above with reference to Figure 13 . Figure 15C shows the viewer's recognition of a moving image captured by a high-speed shutter technique and displayed by an impulsive display at twice the frame rate as described above with reference to Figure 13 . Figure 15D shows the observer's recognition of a moving image captured by a high-speed shutter technique and displayed by a hold-type display at twice the frame rate as described above with reference to Figure 13 .

As shown in each of FIGS. 15A to 15D , in each capture and display method, the amount of blurring due to blurring artifacts in recognition of a displayed image is halved. In addition, image degradation due to stroboscopic artifacts is improved since the discrete number of strobes becomes twice as large. More specifically, blurring and flickering artifacts improve linearly with increasing frame rate. In addition, as the frame rate is increased, the difference between the quality of the moving image quality degradation depending on the shutter period and the emission period is reduced. More specifically, it can be considered that an increased frame rate is a very useful way to improve the quality of moving pictures.

According to the comparison of Figures 13A and 15A and the comparison of Figures 13B and 15B, obviously, the length of the moving object visually perceived by tracking in Figure 15B is the same as the length of the visually perceived motion by tracking in Figure 13B The ratio of the length of the object is smaller than the ratio of the length of the moving object visually perceived by tracking in FIG. 15A to the length of the moving object visually perceived by tracking in FIG. 13A . Similarly, according to the comparison of Figures 13C and 15C and the comparison of Figures 13D and 15D, it is obvious that the length of the moving object visually perceived by tracking in Figure 15D is the same as that visually perceived by tracking in Figure 13D The ratio of the length of the detected moving object is smaller than the ratio of the length of the moving object visually perceived by tracking in FIG. 15C to the length of the moving object visually perceived by tracking in FIG. 13C .

More specifically, it can be considered that if the frame rates of both impulse and hold type displays are similarly increased, the effect of reducing motion blur is higher in hold type displays than in impulse type displays. More specifically, in hold-type displays, the effect of frame rate increases on reducing motion blur that occurs during tracking is significant.

On the other hand, with regard to stroboscopic artifacts (jitters), since the intervals between separately displayed fixed object images generally become shorter, the stroboscopic artifacts (jitters) generally become less perceptible.

For the display of moving images captured by opening the shutter, the quality of moving images was evaluated under tracking conditions in terms of judder and motion blur through visual psychophysical experiments.

FIG. 16 shows the results in terms of judder evaluation, and FIG. 17 shows the results in terms of motion blur evaluation. For this evaluation, various moving images such as natural moving images captured by opening the shutter video, CG moving and video images were prepared. Evaluation points are given according to the following degradation scale: evaluation value 5 = "deterioration is imperceptible", evaluation value 4 = "deterioration is perceptible but not annoying", evaluation value 3 = "deterioration is perceptible but not obstructive", evaluation value 2 = "deterioration is obstructive", and evaluation value 1 = "deterioration is very obstructive". In addition, evaluation scores are given according to the following evaluation scales: evaluation value 5 = "very good", evaluation value 4 = "good", evaluation value 3 = "medium", evaluation value 2 = "bad", and evaluation value 1 = " very bad". In this experiment, evaluation was performed on a sufficient number of test subjects to enable research on evaluation of general moving image quality. In FIGS. 16 and 17 the mean and standard deviation of the ratings given by all test subjects are plotted for all scenes.

Compared with the judder shown in FIG. 16 , the evaluation value variation of the motion blur shown in FIG. 17 is larger, and for both the judder and the motion blur, such a tendency is commonly observed that as the frame rate becomes higher, The evaluation value of the moving image quality becomes high. In particular, the evaluation value of motion blur shows a zigzag trend that reaches around 250fps near the evaluation value of 4.5 as a sensory limit, and shows not lower than the evaluation value of 4.5 at a much higher frame rate flat value. The evaluation value of jitter also shows such a line-like trend, that is, around 250fps reaches the evaluation value of 4.5 as the sensory limit, and shows a roughly flat not lower than the evaluation value of 4.5 at much higher frame rates. value.

Accordingly, motion blur, which causes particularly noticeable degradation in moving image quality during tracking, can be satisfactorily improved by a frame rate close to 250 fps. More specifically, this fact suggests that around 250 fps is an ideal frequency considering the availability of currently widely used video resources. Specifically, as mentioned earlier, a large number of currently widely used video resources have a frame rate of 50 Hz or 60 Hz, and this fact suggests that 240 Hz or 250 Hz, which is an integral multiple of this frequency, is an ideal frequency considering the effectiveness of video resources.

This evaluation is described in more detail below. In the EBU (European Broadcasting Union) method, a measure of 4.5 is the sensory limit above which no difference is essentially imperceptible in any region corresponding to a measure above 4.5, while the measure 3.5 is the allowable limit below which improvement is substantially imperceptible in any region corresponding to evaluation values below 3.5.

In the results of the evaluation focusing on motion blur, the frame rate corresponding to the allowable limit value of the evaluation value 3.5 was 105. At a frame rate of 105, the average user starts to feel an improvement in motion blur. More specifically, at frame rates of 105 or higher, the average user can feel the improvement in motion blur.

In the results of the evaluation focusing on motion blur, the frame rate corresponding to the sensory limit of the evaluation value 4.5 was 230. At frame rates of 230 or higher, the average user perceives a satisfactory improvement in motion blur. In other words, at frame rates of 230 or higher, the average user can perceive peak motion blur improvement. More specifically, at frame rates of 230 or higher, the average user can feel a satisfactory improvement in motion blur.

In the results of the evaluation focusing on jitter, the frame rate 480 has an evaluation value of 5.0, which is a value whose standard deviation is very small. Therefore, at frame rate 480, the typical user cannot recognize the judder. More specifically, at the frame rate 480, image degradation due to shaking can be suppressed to such an extent that the user cannot recognize it.

Therefore, at a frame rate of 150, 200, 250, 300, 350, 400, 450, or 500, which is a frame rate not lower than 105 and equal to an integer multiple of the frame rate 50 in PAL, moving image quality degradation can be improved. At a frame rate not lower than 150 and equal to an integral multiple of the frame rate 50 in PAL, general users can feel improvement in motion blur. At a frame rate not lower than 250 and equal to an integer multiple of the frame rate 50 in PAL, general users can satisfactorily perceive improvement in motion blur.

Similarly, at a frame rate of 120, 180, 240, 300, 360, 420, or 480, which is a frame rate not lower than 105 and equal to an integer multiple of the frame rate 60 in NTSC, moving image quality degradation can be improved. At a frame rate not lower than 120 and equal to an integral multiple of the frame rate 60 in NTSC, general users can feel improvement in motion blur. At a frame rate not lower than 240 and equal to an integral multiple of the frame rate in NTSC of 60, general users can satisfactorily perceive improvement in motion blur.

Image processing can be easily performed at a frame rate equal to an integer multiple of the frequency of a general broadcast format such as NTSC or PAL. Additionally, it has become common to use three-panel type prisms during the capture of video images. Therefore, image processing can be easily performed on a video signal having a frame rate of 180, which is a frame rate not lower than an evaluation value of 3.5, above which a general user can feel Motion blur improvement, and such a video signal can be easily obtained by capturing video images each with a frame rate of 60 while offsetting the video images from each other by 1/180 second by means of a three-panel type prism.

Furthermore, it has been found from a series of experiments that a frame rate of 360 or 350 is particularly preferred when computer graphics images are to be displayed. This is because computer graphics images generally contain high frequency components, for example at their edges. Therefore, deterioration of image quality due to shaking can be easily felt, and when the frame rate of 250 or 240 is changed to that of 360 or 350, even general users can feel improvement in image quality.

The image display system according to the present invention shown above with reference to FIG. 1 or FIG. 6 can be used to display moving images at 240 Hz or 250 Hz, which is a frequency equal to an integral multiple of 50 Hz or 60 Hz. For example, as shown in FIG. 18, two or more projectors 51-1 to 51-n and the image display system according to the present invention can be used to realize moving image display at 240 Hz or 250 Hz, where 240 Hz or 250 Hz is equal to Frequency of 50Hz or an integer multiple of 60Hz.

Each of the projectors 51-1 to 51-n scans pixels (X, Y)=(0, 0) forming a display image to be displayed by scanning in the horizontal direction at timing based on the control of the display control section 27 Up to pixel (X, Y) = (p, q), a frame image corresponding to the supplied video signal is displayed on the screen 52 . When the frame rate of the moving image supplied to the image display system is m Hz, the frame rate of the frame image displayed on the screen 52 by each of the projectors 51-1 to 51-n is m/n Hz, but The frame rate of moving images displayed by projectors 51-1 to 51-n is m Hz. The scanning start timing of each frame displayed by each of the projectors 51-1 to 51-n is shifted by 1/n phase with respect to one display frame provided by each of the projectors 51-1 to 51-n , that is, 1/m second.

For example, when projector 51-2 scans the line corresponding to α+1 frame on the line represented by scan B on screen 52, projector 51-3 scans the frame α+1 on the line represented by scan A on screen 52. The line corresponding to the α+2 frame. The lines represented by scan B are offset by 1/n of the number of lines represented by one frame from the lines represented by scan A. More specifically, the moving image displayed on the screen 52 is alternately rewritten by a plurality of scans including scan A and scan B at intervals of 1/m.

If the frame rate of the input image signal is 240 Hz, and the number of divisions of the image signal is, for example, four, the image signal output from the frame memory is sequentially supplied to four D/A conversion sections, or is divided into four by the data separation section. The frames are sequentially provided to the four frame memories and stored in them. Thus, as shown in FIG. 19, the input video signal S1 is separated into four output video signals S2, S3, S4, and S5, and these four output video signals S2, S3, S4, and S5 are respectively supplied to four scan control part.

The first scan control section controls the display of α frame, α+4 frame, . . . , all of which correspond to the output video signal S2. The second scan control section controls the display of α+1 frame, α+5 frame, . . . , all of which correspond to the output video signal S3. The third scan control section controls the display of α+2 frames, α+6 frames, . . . , all of which correspond to the output video signal S4. The fourth scan control section controls the display of α+3 frames, α+7 frames, . . . , all of which correspond to the output video signal S5. The frame rate of the frames of the output video signal displayed by the first to fourth scan control sections respectively is 1/4 of the frame rate of the input video signal, and the scan start times of the frames scanned by the first to fourth scan control sections respectively The mutual offset is 1/4 of the scan period required to display one frame of each of the output video signals S2 to S5.

If the frame rate of the input image signal is 240 Hz, and the number of divisions of the image signal is, for example, five, the image signal output from the frame memory is sequentially supplied to five D/A conversion sections, or is divided into five D/A conversion sections by the data separation section. The frames are sequentially provided to the five frame memories and stored in them. Thus, as shown in FIG. 20, the input video signal S1 is separated into five output video signals S2, S3, S4, S5, and S6, and the five output video signals S2, S3, S4, S5, and S6 are respectively supplied to Five scan control sections.

The first scan control section controls the display of α frame, α+5 frame, . . . , all of which correspond to the output video signal S2. The second scan control section controls the display of α+1 frame, α+6 frame, . . . , all of which correspond to the output video signal S3. The third scan control section controls the display of α+2 frames, α+7 frames, . . . , all of which correspond to the output video signal S4. The fourth scan control section controls the display of α+3 frames, α+8 frames, . . . , all of which correspond to the output video signal S5. The fifth scan control section controls the display of α+4 frames, α+9 frames, . . . , all of which correspond to the output video signal S6. The frame rate of the frames of the output video signal displayed by the first to fifth scanning control sections respectively is 1/5 of the frame rate of the input video signal, and the scan start times of the frames scanned by the first to fifth scanning control sections respectively The mutual offset is 1/5 of the scan period required to display one frame of each of the output video signals S2 to S6.

In moving image display at 50 Hz or 60 Hz which is most widely used at present, moving image quality deterioration such as blurring or juddering is conspicuous. On the other hand, for example, when 4 or 5 is used as the separation number n of the video signal according to the present invention, it can be achieved by using a widely used conventional type display device (for example, a projector) operating at a frame rate of 50 Hz or 60 Hz. ), to display moving images with a high frame rate. For example, when the number of divisions of the input video signal is n=4, and the frame rate of the display image output from each of the projectors 51-1 to 51-4 is 60 Hz, the frame of the moving image displayed on the screen 52 The rate becomes substantially 240Hz. Furthermore, for example, when the number of divisions of the input video signal is n=5, and the frame rate of the display image output from each of the projectors 51-1 to 51-4 is 50 Hz, the moving image displayed on the screen 52 The frame rate becomes basically 250Hz.

As mentioned earlier, a large number of currently widely used video resources have a frame rate of 50 Hz or 60 Hz, so 240 Hz or 250 Hz, which is an integral multiple of this frequency, becomes an ideal frequency considering the availability of video resources.

Also in this case, of course, the number of scan control sections can be set to s, and the number of divisions of the input video signal can be set to n which is smaller than s, so that it is possible to scan by using n scan control sections among the s scan control sections. Control section to display moving images.

An image display system 101 having another configuration according to an embodiment of the present invention will be described below. FIG. 21 is a block diagram showing the configuration of an image display system 101 using an LCD.

The image display system 101 shown in FIG. 21 includes a signal processing section 111 , a clock/sampling pulse generation section 112 and an image display device 113 . The signal processing section 111 acquires an image signal as an input signal, applies signal processing to the acquired image signal, and supplies digital RGB (red, green, blue) signals to the image display device 113 . The clock/sampling pulse generation section 112 acquires an image signal as an input signal, and detects a horizontal synchronization signal and a vertical synchronization signal from the acquired image signal, and generates a control signal based on the detected horizontal and vertical synchronization signals. The clock/sampling pulse generation section 112 supplies the generated control signal to the signal processing section 111 and the image display device 113 .

The image display device 113 is equipped with an LCD, and displays an image based on signals supplied from the signal processing section 111 and the clock/sampling pulse generation section 112 .

The signal processing section 111 is composed of a Y/C separation/chroma decoding section 121 , an A/D conversion section 122 and a frame memory 123 . The Y/C separation/chroma decoding section 121 separates the acquired image signal into a luminance signal (Y) and a color signal (C), and decodes the color signal, and generates an analog RGB signal. The Y/C separation/chroma decoding section 121 supplies the generated analog RGB signals to the A/D conversion section 122 .

The A/D conversion section 122 performs analog/digital conversion on the analog RGB signal supplied from the Y/C separation/chroma decoding section 121 based on the control signal supplied from the clock/sampling pulse generation section 112, and converts the generated digital RGB The signal is supplied to frame memory 123 . The frame memory 123 temporarily stores the digital RGB signals sequentially supplied from the A/D conversion section 122 , and supplies the stored digital RGB signals to the image display device 113 .

The clock/sampling pulse generation section 112 includes a synchronization signal detection section 124 and a control signal generation section 125 . The synchronization signal detection section 124 detects a horizontal synchronization signal and a vertical synchronization signal from the acquired image signal, and supplies the detected horizontal and vertical synchronization signals to the control signal generation section 125 . The control signal generating section 125 generates a control signal for controlling analog/digital conversion in the A/D converting section 122 based on the horizontal and vertical synchronizing signals supplied from the synchronizing signal detecting section 124, and for controlling the The displayed control signal is provided, and the generated control signal is supplied to the A/D conversion section 122 and the image display device 113 .

The image display device 113 includes an LCD 131, a backlight 132, data line driving circuits 133-1 to 133-4, a gate line driving section 134, and a backlight driving circuit 135. The LCD 131 is a hold-type display having matrix-driven pixels, which are each formed of liquid crystal elements arranged in a screen, and displays images by controlling the orientation of liquid crystals inside the pixels to change the amount of transmitted light.

The backlight 132 is a light source that emits light to enter the LCD 131 from the back of the LCD 131. Based on the control signal supplied from the control signal generating section 125, the data line driving circuits 133-1 to 133-4 and the gate line driving section 134 perform the operation of each pixel of the LCD 131 according to the digital RGB signal supplied from the signal processing section 111. matrix drive. The backlight driving circuit 135 drives the backlight 132 so as to emit light.

More specifically, in the LCD 131, a group of liquid crystal elements 141-1-1, a TFT (Thin Film Transistor) 142-1-1, and a capacitor 143-1-1 to a group of liquid crystal elements 141-n-m (not shown) , TFT 142-n-m (not shown) and capacitor 143-n-m (not shown) are respectively arranged in the first column of the first row to the nth column of the nth row.

Unless the liquid crystal elements 141 - 1 - 1 to 141 -n-m need to be individually identified, the liquid crystal elements 141 - 1 - 1 to 141 -n-m are simply referred to as liquid crystal elements 141 hereinafter. Unless TFT 142-1-1 to TFT 142-n-m need to be identified separately, TFT 142-1-1 to TFT 142-n-m will be referred to as TFT 142 for short below. Unless it is necessary to identify the capacitors 143-1-1 to 143-n-m individually, the capacitors 143-1-1 to TFT 143-n-m are simply referred to as capacitors 143 hereinafter.

A liquid crystal element 141, a TFT 142, and a capacitor 143 are arranged in a group, thereby configuring a sub-pixel. The liquid crystal element 141 contains liquid crystal, and changes the amount of transmitted light of light irradiated from the backlight 132 according to the voltage applied by the TFT 142. The TFT 142 drives the liquid crystal element 141 by applying a voltage to the liquid crystal element 141. The capacitor 143 is provided in parallel with the liquid crystal element 141, and it holds the voltage applied to the liquid crystal element 141 during a period of each frame.

In the LCD 131, a liquid crystal element 141-1-1, a TFT 142-1-1, and a capacitor 143-1-1 all constituting one sub-pixel are arranged in the first left column of the first top row. In the LCD 131, a liquid crystal element 141-1-2, a TFT 142-1-2, and a capacitor 143-1-2 all constituting one sub-pixel are arranged between the liquid crystal element 141-1-1, the TFT 142-1-1, and the to the right of capacitor 143-1-1. Also, in the LCD 131, the liquid crystal element 141-1-3, the TFT 142-1-3, and the capacitor 143-1-3 all constituting one sub-pixel, and the liquid crystal element 141-1-4 all constituting one sub-pixel , TFT 142-1-4, and capacitor 143-1-4 are arranged on the right in the specified order.

In the LCD 131, four sub-pixels arranged side by side in a horizontal row constitute one pixel (pixel). More specifically, the liquid crystal element 141-1-1 to the capacitor 143-1-4 constitute one pixel.

Similarly, in the LCD 131, the liquid crystal element 141-2-1, the TFT 142-2-1, and the capacitor 143-2-1 all constituting one sub-pixel are arranged in the first left column of the second top row. In the LCD 131, the liquid crystal element 141-2-2, the TFT 142-2-2, and the capacitor 143-2-2, which all constitute one sub-pixel, are arranged between the liquid crystal element 141-2-1, the TFT 142-2-1, and the to the right of capacitor 143-2-1. In addition, in the LCD 131, the liquid crystal element 141-2-3, the TFT 142-2-3, and the capacitor 143-2-3 all constituting one sub-pixel, and the liquid crystal element 141-2-4, all constituting one sub-pixel The TFT 142-2-4 and the capacitor 143-2-4 are arranged on the right in the specified order.

The liquid crystal element 141-2-1 to the capacitor 143-2-4 constitute one pixel.

For example, if an image signal of 240 frames/second is supplied, the control signal generating section 125 supplies a control signal to the data line driving circuit 133-1 so as to display frame 1 as the first frame on the leftmost sub-frame located in one pixel. on the pixel.

The data line driving circuit 133-1 reads the digital RGB signal of frame 1 from the frame memory 123, and supplies a driving signal to the LCD 131 based on the read digital RGB signal of frame 1, so that the frame 1 is displayed side by side. On the leftmost sub-pixel among four sub-pixels on a horizontal row of one pixel (pixel), for example, a sub-pixel formed of a liquid crystal element 141-1-1, a TFT 142-1-1, and a capacitor 143-1-1, Or a sub-pixel formed by a liquid crystal element 141-2-1, a TFT 142-2-1, and a capacitor 143-2-1.

Then, the control signal generation section 225 supplies a control signal to the data line driving circuit 133-2 so that frame 2, which is the second frame of the moving image at 240 frames/second, is displayed on the second left sub-pixel of this pixel. .

The data line driving circuit 133-2 reads the digital RGB signal of frame 2 from the frame memory 123, and supplies a driving signal to the LCD 131 based on the read digital RGB signal of frame 2, so that the frame 2 is displayed side by side. Among the four sub-pixels on the horizontal row of this pixel (pixel), the sub-pixel located on the second left is, for example, a sub-pixel formed of a liquid crystal element 141-1-2, a TFT 142-1-2, and a capacitor 143-1-2. , or a sub-pixel formed by a liquid crystal element 141-2-2, a TFT 142-2-2, and a capacitor 143-2-2.

In addition, the control signal generation section 125 supplies a control signal to the data line drive circuit 133-3 so that frame 3, which is the third frame of a moving image of 240 frames/second, is displayed on the sub-pixel located on the third left of this pixel. .

The data line driving circuit 133-3 reads the digital RGB signal of frame 3 from the frame memory 123, and supplies a driving signal to the LCD 131 based on the read digital RGB signal of frame 3 so as to display frame 3 on a screen arranged side by side. This pixel (pixel) is located on the third left sub-pixel among the four sub-pixels on the horizontal row, for example, a sub-pixel formed of a liquid crystal element 141-1-3, a TFT 142-1-3, and a capacitor 143-1-3 , or a sub-pixel formed by a liquid crystal element 141-2-3, a TFT 142-2-3, and a capacitor 143-2-3.

Further, the control signal generating section 125 supplies a control signal to the data line driving circuit 133-4 so as to display frame 4, which is the fourth frame of a moving image at 240 frames/second, on the rightmost sub-pixel located in the pixel.

The data line driving circuit 133-4 reads the digital RGB signal of frame 4 from the frame memory 123, and supplies a driving signal to the LCD 131 based on the read digital RGB signal of frame 4, so that the frame 4 is displayed side by side. On the rightmost sub-pixel among the four sub-pixels on the horizontal row of this pixel (pixel), for example, a sub-pixel formed of a liquid crystal element 141-1-4, a TFT 142-1-4, and a capacitor 143-1-4, Or a sub-pixel formed by a liquid crystal element 141-2-4, a TFT 142-2-4, and a capacitor 143-2-4.

Then, the control signal generating section 125 supplies a control signal to the data line driving circuit 133-1 to display Frame 5, which is the fifth frame of the moving image at 240 frames/second, on the leftmost sub-pixel located in one pixel.

The data line driving circuit 133-1 reads the digital RGB signal of the frame 5 from the frame memory 123, and supplies a driving signal to the LCD 131 based on the read digital RGB signal of the frame 5, so that the frame 5 is displayed side by side. On the leftmost sub-pixel among the four sub-pixels on the horizontal row of this pixel (pixel), for example, a sub-pixel formed of a liquid crystal element 141-1-1, a TFT 142-1-1, and a capacitor 143-1-1, Or a sub-pixel formed by a liquid crystal element 141-2-1, a TFT 142-2-1, and a capacitor 143-2-1.

In this way, four sub-pixels arranged side by side on a horizontal row of one pixel (pixel) sequentially display an image of one frame.

In this case, it is preferable to display each frame during a period of 1/240 second, but it is also preferable to display each frame during a longer period such as 1/60 second.

According to this configuration, even if the response time of the liquid crystal is long, it is possible to display a moving image composed of a large number of frames per second. For example, it is possible to display a moving image at 240 frames/second.

Although an LCD is used in the above configuration, any type of matrix driven display may be used instead of an LCD. For example, a display using LEDs or an organic EL display can be used.

As described above, in the hold type display that holds the display of each pixel on the screen during each frame period, the display is controlled so as to display a moving image composed of 105 or more frames/second, and when based on such control When a moving image composed of 105 or more frames/second is displayed, a moving image with less degradation can be presented to an observer, who is a person watching the displayed moving image, based on human visual characteristics without increasing the frame rate.

In addition, in the matrix drive type display, the display is controlled so as to display a moving image composed of 105 or more frames/second, and when a moving image composed of 105 or more frames/second is displayed based on such control, based on Human visual characteristics without increasing the frame rate can present a less degraded moving image to an observer, who is a person watching the displayed moving image.

All the processing described above can also be performed by means of software. The software can be installed from a recording medium to a computer having dedicated hardware incorporating programs constituting the software, or a general-purpose computer capable of executing various functions by various programs installed thereon.

The recording medium is formed of a package medium or the like in which the program is recorded so as to be distributed to users separately from the computer, and as shown in FIG. - Read Only Memory) and DVD (Digital Versatile Disc)), magneto-optical disk 33 (for example, MD (MiniDisc (trademark)), semiconductor memory 34, and the like.

In this specification, as a matter of course, steps describing a program recorded on a recording medium may include not only processing performed in the order described in a time-series manner but also processing not necessarily performed but performed in parallel or individually.

In this specification, the term "system" means an entire apparatus composed of a plurality of devices.

Claims (42)

1. image processing equipment is used to handle the picture signal that will be shown by image display, and this image processing equipment comprises: storage device is used to store the picture signal with first frame rate that provides; Output-controlling device is used for the control chart image signal to a plurality of image displays or be arranged in the output of a plurality of picture signal display processing units of image display; And display control unit, be used to control demonstration corresponding to the image of the picture signal of under the control of output-controlling device, exporting; Wherein, n image display is being provided at least or is being arranged under the situation of the display processing unit in the image display: the output of output-controlling device control chart image signal makes picture signal output to n image display or display processing unit from storage device frame by frame with second frame rate of the 1/n that equals first frame rate; And display control unit control is corresponding to the demonstration of the image of the picture signal that outputs to n image display or display processing unit, makes corresponding to the image of the picture signal that outputs to n image display or display processing unit the initial moment of demonstration is moved a 1/n who scans the period to another frame from a frame when, show successively with dot sequency or line sequential system with second frame rate.

2. image processing equipment according to claim 1 also comprises checkout gear, is used to detect the synchronizing signal of the picture signal with first frame rate, and wherein output-controlling device is based on the output of this synchronizing signal control chart image signal.

3. image processing equipment according to claim 1 also comprises: digital signal transfer unit, and the picture signal that is used for having first frame rate is converted to digital signal; And a plurality of analog signal conversion devices, the picture signal that is used for having second frame rate is converted to analog signal, and the output with picture signal of second frame rate is controlled by output-controlling device.

4. image processing equipment according to claim 1, wherein: this first frame rate is 240Hz; This second frame rate is 60Hz; There are at least 4 image displays or are arranged in display processing unit in the image display; And the output of output-controlling device control chart image signal makes picture signal to equal 1/4 the frame rate of 240Hz, and promptly the frame rate of 60Hz outputs to 4 image displays or display processing unit frame by frame.

5. image processing equipment according to claim 1, wherein: this first frame rate is 250Hz; This second frame rate is 50Hz; There are at least 5 image displays or are arranged in display processing unit in the image display; And the output of output-controlling device control chart image signal makes picture signal to equal 1/5 the frame rate of 250Hz, and promptly the frame rate of 50Hz outputs to 5 image displays or display processing unit frame by frame.

6. image processing equipment according to claim 1, wherein: this first frame rate is 180Hz; This second frame rate is 60Hz; There are at least 3 image displays or are arranged in display processing unit in the image display; And the output of output-controlling device control chart image signal makes picture signal to equal 1/3 the frame rate of 180Hz, and promptly the frame rate of 60Hz outputs to 3 image displays or display processing unit frame by frame.

7. image processing equipment according to claim 1, wherein: this first frame rate is 150Hz; This second frame rate is 50Hz; There are at least 3 image displays or are arranged in display processing unit in the image display; And the output of output-controlling device control chart image signal makes picture signal to equal 1/3 the frame rate of 150Hz, and promptly the frame rate of 50Hz outputs to 3 image displays or display processing unit frame by frame.

8. mode of in comprising the image processing equipment of memory cell, handling the picture signal that will show by image display, this method comprises: the storage controlled step of the picture signal that control store has first frame rate in the memory cell; The control output image signal is to a plurality of image displays or a plurality of output controlled step that is arranged in the display processing unit in the image display; And control shows the demonstration controlled step corresponding to the image of picture signal; Wherein, n image display is provided at least or is arranged under the situation of the display processing unit in the image display in existence: in the output controlled step, the output of output-controlling device control chart image signal makes picture signal output to n image display or display processing unit from storage device frame by frame with second frame rate of the 1/n that equals first frame rate; And in showing controlled step, control is corresponding to the demonstration of the image of the picture signal that outputs to n image display or n display processing unit in output in the controlled step, makes corresponding to the image of the picture signal that outputs to n image display or n display processing unit the initial moment of demonstration is moved a 1/n who scans the period to another frame from a frame when, show successively with dot sequency or line sequential system with second frame rate.

9. image display system, comprising: image processing equipment is used to handle picture signal; And image display, be used to show picture signal by image processing device processes; Wherein: image processing equipment comprises: storage device is used to store the picture signal with first frame rate that provides; Output-controlling device is used for image display is arrived in control store in the picture signal of storage device output; And display control unit, be used to control by the image of image display demonstration corresponding to the picture signal of exporting by output-controlling device; Image display comprises: a plurality of image display processors, be used for providing image with dot sequency or line sequential system, and display unit, be used to show the image that provides by image display processor; At least n image display processor is provided; The output of output-controlling device control chart image signal makes picture signal output to n image display processor frame by frame with second frame rate of the 1/n that equals first frame rate; And display control unit control is corresponding to the demonstration of the image of the picture signal that outputs to n image display processor, makes corresponding to the image of the picture signal that outputs to n image display processor the initial moment of demonstration is moved a 1/n who scans the period to another frame from a frame when, show successively with dot sequency or line sequential system with second frame rate.

10. image display system according to claim 9; Wherein a plurality of image display processors are carried out this to be provided, and the site error between corresponding n the pixel of the image that the picture signal that making is provided from image processing equipment by the display unit basis shows is less than a pixel wide.

11. image display system according to claim 9, wherein: this first frame rate is 240Hz; This second frame rate is 60Hz; At least 4 image display processors are provided; And the output of output-controlling device control chart image signal makes picture signal to equal 1/4 the frame rate of 240Hz, and promptly the frame rate of 60Hz outputs to 4 image display processors frame by frame.

12. image display system according to claim 9, wherein: this first frame rate is 250Hz; This second frame rate is 50Hz; At least 5 image display processors are provided; And the output of output-controlling device control chart image signal makes picture signal to equal 1/5 the frame rate of 250Hz, and promptly the frame rate of 50Hz outputs to 5 image display processors frame by frame.

13. image display system according to claim 9, wherein: this first frame rate is 180Hz; This second frame rate is 60Hz; At least 3 image display processors are provided; And the output of output-controlling device control chart image signal makes picture signal to equal 1/3 the frame rate of 180Hz, and promptly the frame rate of 60Hz outputs to 3 image display processors frame by frame.

14. image display system according to claim 9, wherein: this first frame rate is 150Hz; This second frame rate is 50Hz; At least 3 image display processors are provided; And the output of output-controlling device control chart image signal makes picture signal to equal 1/3 the frame rate of 150Hz, and promptly the frame rate of 50Hz outputs to 3 image display processors frame by frame.

15. an image display system comprises: image processing equipment is used to handle picture signal; And a plurality of image displays, be used to show picture signal by image processing device processes; Wherein: image processing equipment comprises: storage device is used to store the picture signal with first frame rate that provides; Output-controlling device is used for image display is arrived in control store in the picture signal of storage device output; And display control unit, be used to control by the image of image display demonstration corresponding to the picture signal of exporting by output-controlling device; Each image display comprises: image display processor is used for providing image with dot sequency mode or line sequential system; At least n image display is provided; The output of output-controlling device control chart image signal makes picture signal output to n image display frame by frame with second frame rate of the 1/n that equals first frame rate; And display control unit control is corresponding to the demonstration of the image of the picture signal that outputs to n image display, makes corresponding to the image of the picture signal that outputs to n image display the initial moment of demonstration is moved a 1/n who scans the period to another frame from a frame when, show successively with dot sequency or line sequential system with second frame rate.

16. image display system according to claim 15, wherein each image display is to be used to rely on projection to form the projecting apparatus of image.

17. image display system according to claim 15, wherein a plurality of image display processors are carried out this processing, make site error between corresponding n the pixel of the picture signal that provides from image processing equipment less than a pixel wide.

18. image display system according to claim 15, wherein: this first frame rate is 240Hz; This second frame rate is 60Hz; At least 4 image displays are provided; And the output of output-controlling device control chart image signal makes picture signal to equal 1/4 the frame rate of 240Hz, and promptly the frame rate of 60Hz outputs to 4 image displays frame by frame.

19. image display system according to claim 15, wherein: this first frame rate is 250Hz; This second frame rate is 50Hz; At least 5 image displays are provided; And the output of output-controlling device control chart image signal makes picture signal to equal 1/5 the frame rate of 250Hz, and promptly the frame rate of 50Hz outputs to 5 image displays frame by frame.

20. image display system according to claim 15, wherein: this first frame rate is 180Hz; This second frame rate is 60Hz; At least 3 image displays are provided; And the output of output-controlling device control chart image signal makes picture signal to equal 1/3 the frame rate of 180Hz, and promptly the frame rate of 60Hz outputs to 3 image displays frame by frame.

21. image display system according to claim 15, wherein: this first frame rate is 150Hz; This second frame rate is 50Hz; At least 3 image displays are provided; And the output of output-controlling device control chart image signal makes picture signal to equal 1/3 the frame rate of 150Hz, and promptly the frame rate of 50Hz outputs to 3 image displays frame by frame.

22. an image processing equipment, being used to handle will be by the picture signal of image display demonstration, and this image processing equipment comprises: it is a plurality of subimage signals that separator, the picture signal with first frame rate that is used for will providing frame by frame separate; A plurality of storage devices are used to store the subimage signal by each separation of this separator output; Output-controlling device, be used for control store at each number of sub images signals of a plurality of storage devices to a plurality of image displays or be arranged in the output of a plurality of image display processing units in the image display; And display control unit, being used to control demonstration corresponding to the image of the total picture signal that forms by whole subimage letters, the output of this subimage signal is controlled by output-controlling device; Wherein, under the situation that n image display or display processing unit are provided at least: this separator separates picture signal and is n number of sub images signal; N storage device is provided; The output of output-controlling device control subimage signal makes the subimage signal output to n image display or display processing unit from separately n storage device frame by frame with second frame rate of the 1/n that equals first frame rate; And display control unit control is corresponding to the demonstration of the image of the picture signal that is made of the whole subimage signals that output to n image display or display processing unit, makes corresponding to the image of the subimage signal that outputs to n image display or n display processing unit the initial moment of demonstration is moved a 1/n who scans the period to another frame from a frame when, show successively with dot sequency or line sequential system with second frame rate.

23. image processing equipment according to claim 22 also comprises checkout gear, is used to detect the synchronizing signal of the picture signal with first frame rate, wherein output-controlling device is based on the output of the synchronizing signal control chart image signal that is detected by checkout gear.

24. image processing equipment according to claim 22 also comprises: digital signal transfer unit, the picture signal that is used for having first frame rate is converted to digital signal; And a plurality of analog signal conversion devices, the subimage conversion of signals that is used for having second frame rate is an analog signal, the output with subimage signal of second frame rate is controlled by output-controlling device.

25. image processing equipment according to claim 22, wherein: this first frame rate is 240Hz; This second frame rate is 60Hz; At least 4 image displays or display processing unit are provided; It is 4 subsignals that this separator separates picture signal; 4 storage devices are provided; And the output of output-controlling device control subimage signal makes the subimage signal with the frame rate of 60Hz, outputs to 4 image displays or display processing unit from each 4 storage devices frame by frame.

26. image processing equipment according to claim 22, wherein: this first frame rate is 250Hz; This second frame rate is 50Hz; At least 5 image displays or display processing unit are provided; It is 5 subsignals that this separator separates picture signal; 5 storage devices are provided; And the output of output-controlling device control subimage signal makes the subimage signal with the frame rate of 50Hz, outputs to 5 image displays or display processing unit from each 5 storage devices frame by frame.

27. image processing equipment according to claim 22, wherein: this first frame rate is 180Hz; This second frame rate is 60Hz; At least 3 image displays or display processing unit are provided; It is 3 subsignals that this separator separates picture signal; 3 storage devices are provided; And the output of output-controlling device control subimage signal makes the subimage signal with the frame rate of 60Hz, outputs to 3 image displays or display processing unit from each 3 storage devices frame by frame.

28. image processing equipment according to claim 22, wherein: this first frame rate is 150Hz; This second frame rate is 50Hz; At least 3 image displays or display processing unit are provided; It is 3 subsignals that this separator separates picture signal; 3 storage devices are provided; And the output of output-controlling device control subimage signal makes the subimage signal with the frame rate of 30Hz, outputs to 3 image displays or display processing unit from each 3 storage devices frame by frame.

29. a mode of handling the picture signal that will be shown by image display in comprising the image processing equipment of a plurality of memory cell, this method comprises: the picture signal with first frame rate that will provide is frame by frame separated and is the separating step of a plurality of subimage signals; The storage controlled step of the subimage signal of each separation that control store is exported in separating step in a plurality of memory cell; Control store each number of sub images signal in memory cell is to a plurality of image displays or a plurality of output controlled step that is arranged in the output of the image display processing unit in the image display; And control is corresponding to the demonstration controlled step of the demonstration of the image of the total picture signal that is formed by whole subimages letter, and the output of this subimage signal is controlled in exporting controlled step; Wherein, under the situation that n image display or display processing unit are provided at least: in separating step, picture signal is separated and is n number of sub images signal; N storage device is provided; In the output controlled step, be controlled at storage and be stored in the output of n the subimage signal in the storage device in the controlled step, make the subimage signal output to n image display or display processing unit frame by frame with second frame rate of the 1/n that equals first frame rate from separately n storage device; And in showing controlled step, the demonstration of the image of the picture signal that control constitutes corresponding to the whole subimage signals that output to n image display or display processing unit in output in the controlled step makes corresponding to the image of the subimage signal that outputs to n image display or display processing unit the initial moment of demonstration is moved a 1/n who scans the period to another frame from a frame when, show successively with dot sequency or line sequential system with second frame rate.

30. an image display system comprises: image processing equipment is used to handle picture signal; And image display, be used to show picture signal by image processing device processes; Wherein: image processing equipment comprises: it is a plurality of subimage signals that separator, the picture signal with first frame rate that is used for will providing frame by frame separate; A plurality of storage devices are used to store the subimage signal by each separation of this separator output; Output-controlling device is used for a plurality of image displays are arrived in control store at each number of sub images signal of a plurality of storage devices output; And display control unit, being used to control demonstration corresponding to the image of the total picture signal that forms by whole subimage letters, the output of this subimage signal is controlled by output-controlling device; Image display comprises: a plurality of image display processors are used for providing image with dot sequency mode or line sequential system; And display unit, be used to show the image that provides by image display processor; At least n image display processor is provided; It is n number of sub images signal that this separator separates picture signal; N storage device is provided; The output of output-controlling device control subimage signal makes the subimage signal output to n image display processor from separately n storage device frame by frame with second frame rate of the 1/n that equals first frame rate; And display control unit control is corresponding to the demonstration of the image of the picture signal that is made of the whole subimage signals that output to n image display processor, makes corresponding to the image of the subimage signal that outputs to n image display processor the initial moment of demonstration is moved a 1/n who scans the period to another frame from a frame when, show successively with dot sequency or line sequential system with second frame rate.

31. image display system according to claim 30, wherein a plurality of image display processors are carried out this processing, and the site error between corresponding n the pixel of the image that the picture signal that making is provided from image processing equipment by the display unit basis shows is less than a pixel wide.

32. image display system according to claim 30, wherein: this first frame rate is 240Hz; This second frame rate is 60Hz; At least 4 image display processors are provided; And it is 4 subsignals that this separator separates picture signal; 4 storage devices are provided; And the output of output-controlling device control subimage signal makes the subimage signal with the frame rate of 60Hz, outputs to 4 image display processors from each 4 storage devices frame by frame.

33. image display system according to claim 30, wherein: this first frame rate is 250Hz; This second frame rate is 50Hz; At least 5 image display processors are provided; And it is 5 subsignals that this separator separates picture signal; 5 storage devices are provided; And the output of output-controlling device control subimage signal makes the subimage signal with the frame rate of 50Hz, outputs to 4 image display processors from each 5 storage devices frame by frame.

34. image display system according to claim 30, wherein: this first frame rate is 180Hz; This second frame rate is 60Hz; At least 3 image display processors are provided; And it is 3 subsignals that this separator separates picture signal; 3 storage devices are provided; And the output of output-controlling device control subimage signal makes the subimage signal with the frame rate of 60Hz, outputs to 4 image display processors from each 3 storage devices frame by frame.

35. image display system according to claim 30, wherein: this first frame rate is 150Hz; This second frame rate is 50Hz; At least 3 image display processors are provided; And it is 3 subsignals that this separator separates picture signal; 3 storage devices are provided; And the output of output-controlling device control subimage signal makes the subimage signal with the frame rate of 50Hz, outputs to 3 image display processors from each 3 storage devices frame by frame.

36. an image display system comprises: image processing equipment is used to handle picture signal; And a plurality of image displays, be used to show picture signal by image processing device processes; Wherein: image processing equipment comprises: it is a plurality of subimage signals that separator, the picture signal with first frame rate that is used for will providing frame by frame separate; A plurality of storage devices are used to store the subimage signal by each separation of this separator output; Output-controlling device is used for a plurality of image displays are arrived in control store at each number of sub images signal of a plurality of storage devices output; And display control unit, being used to control demonstration corresponding to the image of the total picture signal that forms by whole subimage letters, the output of this subimage signal is controlled by output-controlling device; Each image display comprises: image display processor is used for providing image with dot sequency mode or line sequential system; At least n image display is provided; It is n number of sub images signal that separator separates picture signal; N storage device is provided; The output of output-controlling device control subimage signal makes the subimage signal output to n image display processor from each n storage device frame by frame with second frame rate of the 1/n that equals first frame rate; And display control unit control is corresponding to the demonstration of the image of the picture signal that is made of the whole subimage signals that output to n image display processor, makes corresponding to the image of the subimage signal that outputs to n image display processor the initial moment of demonstration is moved a 1/n who scans the period to another frame from a frame when, show successively with dot sequency or line sequential system with second frame rate.

37. image display system according to claim 36, wherein each image display is to be used to rely on projection to form the projecting apparatus of image.

38. image display system according to claim 36, wherein a plurality of image display processors are carried out this processing, make site error between corresponding n the pixel of the picture signal that provides from image processing equipment less than a pixel wide.

39. image display system according to claim 36, wherein: this first frame rate is 240Hz; This second frame rate is 60Hz; At least 4 image displays are provided; And it is 4 subsignals that this separator separates picture signal; 4 storage devices are provided; And the output of output-controlling device control subimage signal makes the subimage signal with the frame rate of 60Hz, outputs to 4 image displays from each 4 storage devices frame by frame.

40. image display system according to claim 36, wherein: this first frame rate is 250Hz; This second frame rate is 50Hz; At least 5 image displays are provided; And it is 5 subsignals that this separator separates picture signal; 5 storage devices are provided; And the output of output-controlling device control subimage signal makes the subimage signal with the frame rate of 50Hz, outputs to 5 image displays from each 5 storage devices frame by frame.

41. image display system according to claim 36, wherein: this first frame rate is 180Hz; This second frame rate is 60Hz; At least 3 image displays are provided; And it is 3 subsignals that this separator separates picture signal; 3 storage devices are provided; And the output of output-controlling device control subimage signal makes the subimage signal with the frame rate of 60Hz, outputs to 3 image displays from each 3 storage devices frame by frame.

42. image display system according to claim 36, wherein: this first frame rate is 240Hz; This second frame rate is 60Hz; At least 4 image displays are provided; And it is 4 subsignals that this separator separates picture signal; 4 storage devices are provided; And the output of output-controlling device control subimage signal makes the subimage signal with the frame rate of 60Hz, outputs to 4 image displays from each 4 storage devices frame by frame.

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