JP2004062068A - Video display device - Google Patents

Abstract

An image display device is provided that collectively corrects irregularly-shaped luminance and chromaticity irregularities that occur in a part of one display unit or an area extending over a plurality of display units.
Kind Code: A1 A video data signal generating unit for generating a video data signal of a video, a video display unit for displaying a video on a screen formed by a plurality of display units, and correction coefficients for the plurality of display units are stored. Correction coefficient storing means 130, a display control means 120 for controlling a plurality of display units, a picture element selecting means 150 for selecting at least one picture element, and obtaining change information for changing a correction coefficient. And a correction coefficient changing means 160 for changing the correction coefficient.
[Selection] Fig. 2

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a video display device installed in a large stadium, a multipurpose hall, an outer wall of a building, or the like.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as this type of video display device, one described in JP-A-2001-290471 is known. As shown in FIG. 7, this conventional video display device 1 is connected to one input device 3 having an operation panel 2 and has a display unit 4 in which pixels composed of light emitting elements of three primary colors are integrated and arranged, A video display unit 5 formed by combining a plurality of units 4 in a matrix, a distribution board 6 for supplying power to the video display unit 5, and a video data signal distributed to a plurality of display units 4 arranged in a matrix And a video control unit 8 that controls the video display unit 5 via the display data distributor 7. An external terminal such as a personal computer is used as the input device 3.
[0003]
The image control unit 8 includes a read-only memory (hereinafter simply referred to as ROM) 9, a central processing unit (hereinafter simply referred to as CPU) 10, and a display panel control memory 11. The ROM 9 stores various configuration information and setting information that are control parameters for the video display device 1. When a command is input from the input device 3 to the CPU 10, the CPU 10 reads a control parameter corresponding to the input command from the ROM 9, and stores data based on the read control parameter as control data in the display panel control memory 11. It is designed to be written.
[0004]
Further, the video control section 8 controls the video display section 5 based on the control data written in the display panel control memory 11. Therefore, when the specification of the video display device 1 is changed, various control parameters stored in the ROM 9 are updated by operating the input device 3 or replaced with the ROM 9 storing the new control parameters. This corresponds to a change in the specifications of the display device 1.
[0005]
In such an image display device 1, the luminance and chromaticity of an image are adjusted to a preset standard for each display unit 4, but a screen formed by a plurality of display units 4 has a plurality of display units. There is a display unit 4 that stands out due to differences in luminance and chromaticity between units. Further, when the display unit 4 is replaced for repair, the replaced display unit 4 becomes bright and conspicuous as compared with the other display units 4. In order to prevent such a difference in luminance or chromaticity between display units from being recognized as luminance unevenness or chromaticity unevenness, an operator performs a correction operation by the following method.
[0006]
That is, the operator corrects the unevenness in brightness and chromaticity of the image displayed on the screen formed by the plurality of display units 4 by the operator using the display unit 4 to be corrected displayed on the screen of the display unit of the input device 3. Is performed for each display unit 4 while visually confirming the control information and the image of the display unit 4 to be corrected by the video display device 1.
[0007]
Further, in such an image display device 1, depending on the environment in which the image display device 1 is installed and the structures of the walls and pillars of the installed building, a part of one display unit 4 or a plurality of display units 4 are provided. Irregularly shaped unevenness in luminance and chromaticity may occur in the straddling portion. Correction work for such irregularly shaped luminance unevenness and chromaticity unevenness has been performed for each picture element to be corrected.
[0008]
[Problems to be solved by the invention]
However, the conventional video display apparatus has a problem in that irregularly-shaped luminance unevenness and chromaticity unevenness that occur in a part of one display unit of a screen formed by a plurality of display units or an area extending over a plurality of display units are displayed. Since correction must be performed for each element, there is a problem that the correction operation is complicated.
[0009]
The present invention has been made in order to solve such a problem, and facilitates the work of correcting irregularly-shaped luminance unevenness and chromaticity unevenness occurring in a part of a display unit or an area extending over a plurality of display units. It is intended to provide a video display device which can perform the following.
[0010]
[Means for Solving the Problems]
The video display device of the present invention displays video data signal generating means for generating a video data signal of a preset test pattern video, and displays the preset test pattern video on a screen formed by a plurality of display units. Video display means, a plurality of correction coefficient storage means for respectively storing the correction coefficients of the plurality of display units, a plurality of display control means for controlling the plurality of display units based on the correction coefficients, and Picture element selection means for selecting at least one picture element, and a correction coefficient change for changing the correction coefficient of the selected picture element based on change information for changing the correction coefficient corresponding to the selected picture element Means.
[0011]
With this configuration, the correction coefficient of the selected picture element can be changed.
[0012]
Also, in the video display device of the present invention, the video data signal generation unit generates the video data signal so that a cursor indicating the picture element is displayed on the screen, and the picture element indicated by the cursor is displayed. It is configured to generate the video signal so that when selected, the marking indicating the selected picture element is displayed.
[0013]
With this configuration, the picture element to be corrected can be displayed on the screen.
[0014]
Further, in the video display device of the present invention, the correction coefficient includes at least a luminance correction coefficient for controlling the luminance of the picture element, and when the change information for changing the luminance correction coefficient is input, the correction coefficient change is performed. Means for changing the luminance correction coefficient for each of the picture elements based on the change information.
[0015]
With this configuration, the luminance correction coefficient of the selected picture element can be changed.
[0016]
In the video display device of the present invention, the correction coefficient includes at least a color temperature correction coefficient for controlling a color temperature of the picture element, and when the change information for changing the color temperature correction coefficient is input, The correction coefficient changing means changes the color temperature correction coefficient for each picture element based on the change information.
[0017]
With this configuration, the color temperature correction coefficient of the selected picture element can be changed.
[0018]
Further, in the video display device of the present invention, the correction coefficient includes at least a white balance correction coefficient for controlling a white balance of the picture element, when the change information for changing the white balance correction coefficient is input, The correction coefficient changing means changes the white balance correction coefficient for each picture element based on the change information.
[0019]
With this configuration, the white balance correction coefficient of the selected picture element can be changed.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0021]
1 and 2 show block diagrams of a schematic configuration of a video display device according to the present invention.
[0022]
As shown in FIG. 1, the video display device 100 of the present invention includes a video display unit 132 that displays video on one screen in which a plurality of display units 131 are arranged and formed, and a video data signal that is displayed on the plurality of display units 131. , An analog-to-digital converter 111 (hereinafter, simply referred to as an AD converter) for converting an input analog video signal into a digital video signal, and a video display unit 132. A video adjustment unit 112 for adjusting the brightness and hue of a video, a test signal generation unit 113 for generating a test signal displayed on the screen of the video display unit 132, and a signal transmission for transmitting a video data signal to the video display unit 132 A monitoring information receiving unit 115 that receives monitoring information transmitted from the video display unit 132, a CPU 116, a memory 117, And a control information storage unit 118 for storing control information, and an operation panel 119 for inputting control information.
[0023]
As shown in FIG. 2, the image display unit 132 includes an image display unit 110 that displays a test pattern image set in advance on a screen formed by the plurality of display units 131, and a correction coefficient of the plurality of display units 131. , And a plurality of display control means 120 for controlling the plurality of display units 131 based on the correction coefficients stored in the plurality of correction coefficient storage means 130, respectively.
[0024]
The test signal generator 113 constitutes a video data signal generator 140 that generates a video data signal of a preset test pattern video.
[0025]
The CPU 116 acquires the picture element selection means 150 for selecting at least one picture element from the screen, and the change information for simultaneously changing the correction coefficients corresponding to the selected plurality of picture elements, and is selected based on the change information. And a correction coefficient changing means 160 for simultaneously changing the correction coefficient of the picture element.
[0026]
The video data signal generating means 140 generates a video data signal so that a cursor indicating a picture element is displayed on a screen, and when a picture element indicated by the cursor is selected, a marking indicating the selected picture element is displayed. A video data signal is generated.
[0027]
Here, the correction coefficient includes at least a brightness correction coefficient for controlling the brightness of the picture element, and when change information for changing the brightness correction coefficient is input, the correction coefficient changing means 160 determines the picture element selecting means based on the change information. The brightness correction coefficients of all picture elements to be corrected selected by 150 are changed collectively.
[0028]
Further, when the correction coefficient includes at least a color temperature correction coefficient for controlling the color temperature of the picture element, and when change information for changing the color temperature correction coefficient is input, the correction coefficient changing means 160 sets the picture element based on the change information. The color temperature correction coefficients of all the pixels to be corrected selected by the selection unit 150 are changed collectively.
[0029]
Further, the correction coefficient includes at least a white balance correction coefficient for controlling the white balance of the picture element, and when change information for changing the white balance correction coefficient is input, the correction coefficient changing means 160 sets the picture element based on the change information. The white balance correction coefficients of all the pixels to be corrected selected by the selection unit 150 are changed collectively.
[0030]
The operation of the video display device configured as described above will be described with reference to FIG.
[0031]
First, the video data signal generator 140 generates a video data signal of a preset test pattern video. Here, as a preset test pattern image to be displayed on the screen, a plain image is selected based on selection information such that one plane image is selected from at least four types of plane images of white, red, green, and blue. A video data signal is generated (Step S120). The generated video data signal is acquired for each display unit 131, and the display control unit 120 controls the display unit 131 (step S130). Thereafter, the test pattern image set in advance is displayed on the screen by the image display means 110 (step S140). If there is unevenness in luminance or chromaticity in the displayed test pattern image, at least one of the plurality of picture elements is selected by the picture element selecting means 150 (step S150). Thereafter, the correction coefficient changing unit 160 acquires change information for collectively changing the correction coefficients corresponding to the selected picture elements (step S160). The correction coefficient is changed by the correction coefficient changing means 160 based on the change information (step S170). Finally, the changed correction coefficient is stored in the correction coefficient storage means 130 (Step S180).
[0032]
Here, when the change information for changing the brightness correction coefficient is obtained, the brightness correction coefficients of all the picture elements to be corrected selected by the picture element selection unit 150 are collectively changed and the brightness is corrected. Further, when the change information for changing the color temperature correction coefficient is obtained, the color temperature correction coefficients of all the correction target picture elements selected by the picture element selection unit 150 are collectively changed to correct the color temperature. When change information for changing the white balance correction coefficient is obtained, the white balance correction coefficients of all the pixels to be corrected selected by the pixel selection means 150 are collectively changed to correct the white balance.
[0033]
The step of selecting a picture element (step S150) will be described in more detail with reference to FIGS.
[0034]
First, position information of the position where the cursor is displayed is obtained (step S151). Cursor information is added to the video data signal based on the position information, and the picture element on which the cursor is displayed is displayed in halftone (step 152). Then, selection information for selecting the picture element indicated by the cursor is obtained (step S153), and a marking indicating that the picture element has been selected based on the selection information is displayed. Here, the picture element on which the marking is displayed is displayed in a luminance emphasized manner. FIG. 5 shows a state in which irregularity of luminance unevenness has occurred in a portion of the screen that extends over a plurality of display units. On the other hand, FIG. 6 shows a state in which a picture element in a portion where luminance unevenness has occurred is selected, and the selected picture element is displayed with luminance emphasis. By highlighting the selected picture elements, all the picture elements in a portion where the luminance unevenness occurs can be selected. (Step S154).
[0035]
As described above, in the video display device 100 according to the embodiment of the present invention, the CPU 116 changes the correction coefficient corresponding to the selected picture element by changing the picture element selecting unit 150 for selecting at least one picture element from the screen. And a correction coefficient changing means 160 for changing the correction coefficient of the selected picture element based on the change information to be changed, so that a part of one display unit of a screen formed by a plurality of display units or a plurality of Correction work can be facilitated by correcting all the picture elements to be corrected by correcting uneven brightness and chromaticity unevenness occurring in an area extending over the display unit.
[0036]
【The invention's effect】
As described above, according to the present invention, irregularities of luminance unevenness and chromaticity unevenness that occur in a part of one display unit of a screen formed by a plurality of display units or in an area extending over the plurality of display units are generated. In addition, it is possible to provide a video display device having an effect of facilitating a correction operation by collectively correcting all picture elements to be corrected.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of a video display device according to an embodiment of the present invention. FIG. 2 is a block diagram illustrating a configuration of a video display device according to an embodiment of the present invention. 4 is a flowchart showing a processing procedure for selecting a picture element of the video display apparatus according to the embodiment of the present invention. FIG. 5 is a flowchart showing a processing procedure for selecting a picture element of the video display apparatus according to the embodiment of the present invention. FIG. 6 is a view showing a state in which irregular brightness unevenness has occurred in a portion of the screen over a plurality of display units. FIG. 6 is a view showing a portion of the video display device according to an embodiment of the present invention in which brightness unevenness has occurred. FIG. 7 is a diagram showing a state in which a picture element is selected and luminance is highlighted. FIG. 7 is a block diagram showing a configuration of a conventional video display device.
REFERENCE SIGNS LIST 100 video display device 110 video display means 111 AD conversion unit 112 video adjustment unit 113 test signal generation unit 114 signal transmission unit 115 monitoring information reception unit 116 CPU
117 memory 118 control information storage unit 119 operation panel 120 display control unit 121 signal distributor 130 correction coefficient storage unit 131 display unit 132 video display unit 140 video data signal generation unit 150 picture element selection unit 160 correction coefficient change unit

Claims (5)

Video data signal generating means for generating a video data signal of a predetermined test pattern video; video display means for displaying the predetermined test pattern video on a screen formed by a plurality of display units; and A plurality of correction coefficient storage means for respectively storing the correction coefficients of the display units; a plurality of display control means for respectively controlling the plurality of display units based on the correction coefficients; and selecting at least one picture element from the screen. Picture element selecting means, and a correction coefficient changing means for changing the correction coefficient of the selected picture element based on change information for changing the correction coefficient corresponding to the selected picture element, Video display device. The video data signal generating means generates the video data signal so that a cursor indicating the picture element is displayed on the screen, and when the picture element indicated by the cursor is selected, the selected picture The video display device according to claim 1, wherein the video signal is generated so that a marking indicating an element is displayed. The correction coefficient includes at least a luminance correction coefficient for controlling the luminance of the picture element, and when the change information for changing the luminance correction coefficient is input, the correction coefficient changing unit sets the picture based on the change information. The video display device according to claim 1, wherein the luminance correction coefficient is changed for each element. The correction coefficient includes at least a color temperature correction coefficient for controlling a color temperature of the picture element, and when the change information for changing the color temperature correction coefficient is input, the correction coefficient changing unit is configured based on the change information. The image display device according to claim 1, wherein the color temperature correction coefficient is changed for each of the picture elements. The correction coefficient includes at least a white balance correction coefficient for controlling the white balance of the picture element, and when the change information for changing the white balance correction coefficient is input, the correction coefficient changing unit is configured to perform a correction based on the change information. The video display device according to claim 1, wherein the white balance correction coefficient is changed for each picture element.

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