JP2011075668A - Image display device and method for driving the same - Google Patents

Abstract

An image display apparatus capable of performing appropriate display suitable for, for example, stereoscopic display under an environment other than low temperature, and a driving method thereof.
A display panel having a plurality of pixels is controlled by drive control means (mainly a timing controller). The drive control means performs scanning drive control of the display panel 40 by selectively using the two drive modes of the first drive mode and the second drive mode, so that an image corresponding to the input image signal is displayed on the display panel. 40. In the second driving mode, driving in which the scanning period from the start of scanning for one screen on the display panel 40 to the end of scanning for one screen is shorter than that in the first driving mode. Take control.
[Selection] Figure 1

Description

  The present invention relates to an image display device used for, for example, glasses-type stereoscopic display and a method for driving the image display device.

  Conventionally, glasses-type stereoscopic display devices that realize stereoscopic viewing by wearing special glasses for stereoscopic viewing using a liquid crystal shutter and showing separate images with parallax in both eyes of an observer are known. ing. In order to realize stereoscopic vision, it is necessary to show different parallax images for the left eye and the right eye, and thus two parallax images of a left eye image and a right eye image are necessary. In the glasses-type stereoscopic display device, the left-eye image and the right-eye image are alternately displayed on the two-dimensional display panel in a time-sharing manner, and the shutter of the liquid crystal shutter glasses is synchronized with the display timing. By alternately controlling on / off (open / close), the stereoscopic view is realized.

JP-A-11-95722

  In a stereoscopic display device, when displaying a binocular parallax image on a two-dimensional display panel, flicker occurs if the display interval between the left and right parallax images is too large. In order to solve this, there is a method of displaying the left and right parallax images in a time-division manner within a normal frame frequency period of 60 Hz (or 50 Hz). In this case, each parallax image is displayed at a frame frequency of 120 Hz (or 100 Hz). In this case, the two-dimensional display panel needs a driving performance at a double speed of 120 Hz with respect to a normal driving speed of 60 Hz. In Patent Document 1, when a plasma display panel is used as a two-dimensional display panel, two horizontal lines can be scanned simultaneously to enable driving at double speed. However, in the method of scanning two horizontal lines simultaneously, The vertical display resolution is reduced to 1/2. On the other hand, in the case of a liquid crystal display panel, in recent years, a product capable of 120 Hz double speed driving has already been commercialized, and each of the left and right parallaxes within a frame frequency period of 60 Hz (or 50 Hz) without reducing display resolution Images can be displayed in a time-sharing manner.

  However, in the case of a liquid crystal display panel, there is a problem in the response speed of the liquid crystal, and there may be a delay from when the drive signal is applied until the image is completely switched. For this reason, when the left and right parallax images are displayed in a time-division manner, the left and right parallax images may not be completely switched, and crosstalk in which the left and right parallax images are displayed may occur. For example, when the backlight is always turned on and the screen is scanned from the top to the bottom, the crosstalk becomes particularly severe as it goes up and down the screen. As a method for improving this, a method of writing the left and right parallax images twice in a time division manner is conceivable. For example, assuming that the left-eye image is L and the right-eye image is R, a method of displaying images in the order of LLRR, for example, within a frame frequency period of 60 Hz is conceivable. In this case, by writing the same image twice, the switching timing of the left and right parallax images is improved as compared with the case where the left and right parallax images are displayed one by one. Crosstalk can be improved by controlling on / off the shutter of the liquid crystal shutter glasses at the timing when the left and right parallax images are sufficiently switched.

  In order to perform the above-described LLRR display, it is necessary to display each parallax image at a frame frequency of 240 Hz or more. Recently, high-quality liquid crystal display panels have been developed that can be driven at a quadruple speed of 240 Hz (or 200 Hz) with respect to a normal drive speed of 60 Hz (or 50 Hz). By using such a liquid crystal display panel, the above LLRR display can be performed.

  However, even if the above-described LLRR display is performed using the conventional driving method and synchronized with the opening / closing timing of the shutter in the liquid crystal shutter glasses, it is difficult to completely eliminate the crosstalk due to the liquid crystal response. It is. In this method, since either one of the left and right parallax images is written twice, and the liquid crystal response is about to be completed, the other parallax image is displayed and scanned. Crosstalk occurs between the upper part of the screen where the response for displaying is started. Even if the shutter timing of the liquid crystal shutter glasses is adjusted so that the crosstalk is minimized at the center of the screen, the crosstalk occurs at the top and bottom of the screen. Furthermore, since the response speed is lower than that at room temperature under a low temperature environment, the problem of crosstalk tends to be worsened. In order to solve such a problem of crosstalk, it is conceivable to increase the scanning speed (shorten the scanning period from the start of scanning for one screen to the end of scanning for one screen). On the other hand, increasing the scanning speed is difficult to realize only in an environment other than low temperatures (normal temperature and high temperature) due to the characteristics of the liquid crystal display panel. However, in order to guarantee the writing characteristics in a low temperature environment, a normal liquid crystal display panel has a margin for the scanning speed performance at a temperature other than the low temperature, and the scanning speed is not intentionally increased. Not.

  The present invention has been made in view of such problems, and an object of the present invention is to provide an image display apparatus capable of performing appropriate display suitable for, for example, stereoscopic display under an environment other than low temperature, and a driving method thereof. Is to provide.

  An image display device according to the present invention performs scanning drive control of a display panel by selectively using a display panel having a plurality of pixels and two drive modes of a first drive mode and a second drive mode. And drive control means for displaying an image corresponding to the input image signal on the display panel. In the second drive mode, the drive control means has a shorter scanning period from the start of scanning for one screen on the display panel to the end of scanning for one screen than in the first drive mode. The drive control is performed so as to be in between.

  In the image display device according to the present invention, for example, when the external temperature becomes higher than a predetermined temperature, the scanning drive control in the second drive mode is performed. In the second drive mode, drive control is performed so that the scanning period is shorter than that in the first drive mode. Thereby, for example, it is possible to perform screen scanning at high speed in an environment other than low temperature (normal temperature, high temperature).

  According to the image display device or the driving method thereof of the present invention, in the second driving mode, the driving control is performed such that the scanning period is shorter than that in the first driving mode. Screen scanning can be performed at high speed in an environment (normal temperature, high temperature), and appropriate display suitable for stereoscopic display can be performed in an environment other than low temperature.

1 is a block diagram showing a circuit configuration of an image display device according to a first embodiment of the present invention. (A) is explanatory drawing which shows typically the state in which the image for left eyes and the image for right eyes were included 2 each in the frame frequency period of 60 Hz, (B) is each shown to (A). It is explanatory drawing which shows typically the state which displayed the image in 1st drive mode. It is explanatory drawing which shows typically the 1st display example by the 2nd drive mode in the image display apparatus which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows typically the 2nd display example by the 2nd drive mode in the image display apparatus which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows typically the example of a display by the 2nd drive mode in the image display apparatus which concerns on the 2nd Embodiment of this invention. It is a block diagram which shows the circuit structure of the image display apparatus which concerns on the 3rd Embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<First Embodiment>
[Configuration of image display device]
FIG. 1 shows the overall configuration of an image display apparatus according to a first embodiment of the present invention. This image display device can be used as a stereoscopic display device in combination with, for example, liquid crystal shutter glasses. The image display device includes a timing controller (TCON) (LCD controller) 10, a first frame buffer 21, an external ROM (Read Only Memory) 22, a second frame buffer 23, a temperature sensor 25, a display. Panel 40. The image display device also includes a source driver 41 connected to a plurality of source lines of the display panel 40 and a gate driver 42 connected to a plurality of gate lines of the display panel 40. The source driver 41 includes a plurality of drivers 41-1, 41-2,... 41-n, and a predetermined number of source lines are connected to each driver. The gate driver 42 includes a plurality of drivers 42-1, 42-2,... 42-m, and a predetermined number of gate lines are connected to each driver. In FIG. 1, the circuit portion excluding the display panel 40 corresponds to a specific example of “drive control means” in the present invention.

  The display panel 40 is a transmissive liquid crystal panel that displays an image, for example, by controlling the passage of light emitted from the backlight 3 with liquid crystal molecules. Although not shown, the display panel 40 includes a pixel electrode substrate, a counter substrate disposed so as to face the pixel electrode substrate, and a liquid crystal layer sealed between the pixel electrode substrate and the counter substrate. A planar common electrode to which a common potential VC is applied is uniformly formed on the liquid crystal layer side of the counter substrate. A plurality of pixel electrodes are formed in a matrix on the liquid crystal layer side of the pixel electrode substrate. The common electrode and the pixel electrode are formed by transparent electrodes made of, for example, ITO (Indium-Tin Oxide). A signal voltage is selectively applied to the pixel electrode by, for example, a TFT (Thin Film Transistor).

  The timing controller 10 includes a receiving unit 11, a data processing circuit 12, a first memory controller 13, a color correction circuit 14, an overdrive circuit 15, a second memory controller 16, and a timing generator circuit unit 17. And a temperature determination circuit 26. The timing generator circuit unit 17 includes a control signal generation unit 18, a data formatter 19, and a transmission unit 20.

  The timing controller 10 drives the display panel 40 by controlling the source driver 41 and the gate driver 42 based on the input image signal. The timing controller 10 selectively displays the image corresponding to the input image signal on the display panel by selectively using the two drive modes of the first drive mode and the second drive mode.

  Here, the first drive mode is a normal drive mode. In the second driving mode, driving is performed such that the scanning period from the start of scanning for one screen on the display panel 40 to the end of scanning for one screen is shorter than that in the first driving mode. This is the mode to control. The second drive mode is used, for example, when the external environment is not low temperature and a predetermined high temperature environment (normal temperature, high temperature) is set such that the response capability of the liquid crystal in the display panel 40 is relatively high.

  The external ROM 22 stores operation settings inside the timing controller 10. The first frame buffer 21 and the second frame buffer 23 temporarily store image information for performing signal processing of inter-frame images, for example, in the timing controller 10. The gate driver 42 turns on the switching element T connected to each subpixel electrode of the display panel 40 in units of horizontal lines. The source driver 41 supplies a potential corresponding to display data to the pixels on the horizontal line selected by the gate driver 42.

  The receiving unit 11 receives an input image signal transferred from the outside. The input image signal includes, for example, R (red), G (green), and B (blue) image data signals, and display control signals (vertical synchronization signal Hsync, horizontal synchronization signal Vsync, and write control signal Enable). Is entered. For example, as shown in FIG. 2A, the image data signal is a stereoscopic image signal in which left-eye images L1, L2... And right-eye images R1, R2. It is. For example, two left and right parallax images are included at equal intervals in time within a frame frequency period (16.6 ms) of 60 Hz. In this case, each parallax image is updated at 240 Hz (4.17 ms). The timing controller 10 usually causes the display panel 40 to display an image having a frame configuration as shown in FIG. 2A at the same display rate using the first drive mode.

  The data processing circuit 12 converts the frame rate of the input image signal. The first memory controller 13 controls writing and reading of image information between the data processing circuit 12 and the first frame buffer 21.

  The color correction circuit 14 corrects the color gamma characteristic. The second memory controller 16 controls writing / reading of image information between the overdrive circuit 15 and the second frame buffer 23. The overdrive circuit 15 performs signal conversion in accordance with a combination of an image delayed by the frame via the second frame buffer 23 and image information without delay from the color correction circuit 14.

  The timing generator circuit unit 17 converts the image signal from the overdrive circuit 15 into a signal for driving the display panel 40 and supplies it to the source driver 41 and the gate driver 42. The data formatter 19 converts the arrangement of image data according to the transmission method of the source driver 41. The transmission unit 20 performs signal transfer according to the transmission method of the source driver 41. The control signal generator 18 supplies control signals to the source driver 41 and the gate driver 42. The control signal generator 18 supplies a gate driver control signal for scanning the horizontal line of the display panel 40 to the gate driver 42. A signal corresponding to RGB image data is input to the source driver 41 as a drive signal via the transmission unit 20, and a source driver control signal is input from the control signal generation unit 18. The source driver control signal is a signal for controlling the polarity and level conversion of the potential for writing to each pixel of the display panel 40.

  The temperature sensor 25 detects an external temperature. The temperature determination circuit 26 determines whether or not the external temperature detected by the temperature sensor 25 is higher than a predetermined temperature set in advance. The determination result by the temperature determination circuit 26 is input to the data processing circuit 12 and the control signal generation unit 18 of the timing generator circuit unit 17. The data processing circuit 12 and the control signal generator 18 perform scanning drive control in the second drive mode when it is determined that the temperature is higher than a predetermined temperature set in advance. The data processing circuit 12 performs frequency conversion of the input image signal when performing scanning drive control in the second drive mode. In the second drive mode, the control signal generation unit 18 generates a control signal having a timing corresponding to the converted signal frequency.

[Operation in First Drive Mode]
In the first drive mode, the image display device performs display as shown in FIGS. 2A and 2B, for example. FIG. 2A schematically shows a state where two images for left eye L1, L2,... And two images for right eye R1, R2. FIG. 2B schematically shows a state in which each image shown in FIG. 2A is displayed in the first drive mode. FIG. 2B shows an image image in consideration of the scanning of the display panel 40 and the liquid crystal response. G1 schematically shows the first scan of the left-eye image L1, and G2 schematically shows the second scan of the same left-eye image L1. In this example, the scanning period from the start of scanning of each image to the end of scanning is 4.17 ms.

  For stereoscopic viewing, for example, liquid crystal shutter glasses are used. The liquid crystal shutter glasses have a left-eye shutter and a right-eye shutter that can be opened and closed independently of each other. The liquid crystal shutter glasses appropriately synchronize the left-eye shutter and the right-eye shutter in synchronization with the display timing of the left-eye images L1, L2,... And the right-eye images R1, R2,. By controlling the opening and closing, stereoscopic viewing becomes possible.

  As shown in FIG. 2B, in the display panel 40, the pixel data of the left-eye image L1 is written from the first scan G1, but since there is a delay in the liquid crystal response, the first scan G1 is performed. At the time of the start, the immediately previous image (right-eye image R0) is displayed. The dotted line portion LS1 indicates the timing at which the image display is substantially switched to the left-eye image L1 on the display panel 40. On the liquid crystal shutter glasses side, the shutter for the left eye is opened so as to synchronize with this timing LS1. The dotted line RS1 indicates the timing at which the image display is substantially switched to the right-eye image R1 on the display panel 40. On the liquid crystal shutter glasses side, the shutter for the right eye is opened so as to synchronize with this timing RS1. Note that the timing for opening the shutter is appropriately adjusted so as to be optimal at the center of the screen.

  In the first drive mode, due to the response speed of the liquid crystal, the left and right parallax images are not completely switched, and crosstalk in which the left and right parallax images are displayed may occur. For example, when the backlight is always turned on and the screen is scanned from the top to the bottom, the crosstalk becomes particularly severe as it goes up and down the screen. In this embodiment, in such a case, the crosstalk is reduced by driving in the second drive mode.

[Operation in Second Drive Mode]
3A and 3B show a first display example in the second drive mode. Compared to the scan in the first drive mode shown in FIGS. This is an example in which screen scanning is performed at 5 times the speed. This shortens the scanning period from the start of scanning of each image to the end of scanning to 2.77 ms. In order to perform such scanning, the data processing circuit 12 uses the first memory controller 13 and the first frame buffer 21 to perform processing for increasing the frame rate of the input image signal.

  By performing scanning at a speed of 1.5 times in this way, the scanning G1, G2 of the image L1 for the left eye can be performed faster within one frame frequency period of 60 Hz compared to the first driving mode, The display response profiles can be aligned in one frame frequency period. Since the display responses are uniform, the range in which the timing for opening the shutter of the liquid crystal shutter glasses is optimal is widened. Since the scanning is faster, the shutter can be opened at a better timing with less mixing of parallax images of both eyes compared to the display as shown in FIGS. Note that by setting the speed to 1.5 times, it is possible to increase and display the left and right parallax images within one frame frequency period of 60 Hz. However, in the present embodiment, the first drive mode and the second Drive control is performed so that the number of displayed images is the same in the drive mode.

  4A and 4B are second display examples in the second drive mode. As in the display examples of FIGS. 3A and 3B, the screen is scanned at a speed of 1.5 times. The display start time of each image is the same as the display examples of FIGS. 3A and 3B. Is different. For example, in the display examples of FIGS. 3A and 3B, the second scan G2 is started immediately after the first scan G1 of the left-eye image L1. On the other hand, in the display examples of FIGS. 4A and 4B, after the first scan G1 of the left-eye image L1, the second scan G2 is started after a predetermined interval. . In the display examples of FIGS. 4A and 4B, the interval between the start timing of the first scan G1 and the start timing of the second scan G2 is 3.5 ms. Note that the scanning period from the start of scanning of each image to the end of scanning is shortened to 2.77 ms as in the display examples of FIGS. Thus, in this embodiment, when driving in the second drive mode, display of each image within one frame period is started while keeping the number of images displayed within one frame period constant. Time can be set arbitrarily

  In the present embodiment, the effect of improving the response by the feedback loop of the overdrive circuit 15 is also obtained by speeding up the screen scanning in the second drive mode. The overdrive circuit 15 compensates the liquid crystal response by performing feedback of the display image drive in the time direction. When the same image continues as in the present embodiment, the overdrive is strongly corrected at the first time, and then the second time is weakly corrected or not corrected, so that the operation is often stabilized. Depending on the response characteristics of the liquid crystal display device, it may not be necessary to update the display drive for the first and second times early. Therefore, by arbitrarily taking the first and second display update periods, the overdrive feedback timing can be adjusted.

  As described above, according to the present embodiment, for example, when the external temperature becomes higher than a predetermined temperature, the scanning drive control is performed in the second drive mode, and compared with the first drive mode. Drive control is performed so that the scanning period is short. Thereby, for example, screen scanning can be performed at high speed even in an environment other than low temperature, and crosstalk can be reduced. In addition, since it is possible to afford time for setting the optimum timing when opening the shutter of the shutter glasses, the time for opening the shutter can be extended and the luminance can be improved.

<Second Embodiment>
Next, an image display apparatus according to a second embodiment of the present invention will be described. Note that components that are substantially the same as those of the image display apparatus according to the first embodiment are denoted by the same reference numerals, and description thereof is omitted as appropriate.

  The image display apparatus according to the present embodiment is different from the first embodiment in the operation in the second drive mode. The basic circuit configuration and operation in the first drive mode are the same as in the first embodiment.

  FIGS. 5A and 5B are display examples in the second drive mode in this embodiment. Also in this embodiment, in the second drive mode, the screen is scanned at a speed of 1.5 times as in the display examples of FIGS. 3A and 3B. Control is performed to increase the number of images to be displayed within one frame period as compared to one drive mode. Since the display period can be increased by setting the speed to 1.5 times, in the display examples of FIGS. 5A and 5B, the left and right parallax images are increased and displayed one by one within one frame frequency period of 60 Hz. ing. As a result, the left-eye image L1 and the right-eye image L2 are each displayed three times in succession within one frame frequency period. Note that the data processing circuit 12 uses the first memory controller 13 and the first frame buffer 21 to generate an image to be newly inserted.

  As described above, in the present embodiment, the number of displayed images is increased by the amount corresponding to the shortening of the scanning period of one image in the second driving mode. As a result, the response characteristic of the display device can be improved by increasing the number of feedbacks in the overdrive circuit 15. When the driving circuit in the subsequent stage has a sufficient capacity, it is freed by shortening the scanning period. You can insert as many images as your time allows.

<Third Embodiment>
Next, an image display apparatus according to a third embodiment of the present invention will be described. Note that components that are substantially the same as those of the image display device according to the first or second embodiment are denoted by the same reference numerals, and description thereof is omitted as appropriate.

  FIG. 6 shows the overall configuration of the image display apparatus according to the present embodiment. In this embodiment, the data transmission speed is increased by using an RGB-YUV encoder and a YUV-RGB decoder. The RGB-YUV encoder converts RGB image signals into a luminance signal Y and a color difference signal UV in a compressed state. The YUV-RGB decoder converts the compressed luminance signal Y and color difference signal UV into RGB image signals before compression.

  First, in the timing controller 10 </ b> A, a pair of RGB-YUV encoder 31 and YUV-RGB decoder 32 are provided between the first memory controller 13 and the first frame buffer 21. Further, a pair of RGB-YUV encoder 33 and YUV-RGB decoder 34 are provided between the second memory controller 16 and the second frame buffer 23. Further, an RGB-YUV encoder 35 is provided between the overdrive circuit 15 and the data formatter 19. Correspondingly, a YUV-RGB decoder 43 (43-1, 43-2, ... 43-m) is provided in the source driver 41 (41-1, 41-2, ... 41-n). ing.

  In the present embodiment, in the second drive mode, the data transmission speed is increased using the RGB-YUV encoder and the YUV-RGB decoder so that the scanning period is shorter than that in the first drive mode. Drive control can be performed. In the RGB-YUV conversion process by the RGB-YUV encoder, the amount of image data transferred between the chip sets of the display device can be compressed by performing data compression. This can be transmitted at high speed.

<Other embodiments>
The present invention is not limited to the above embodiments, and various modifications can be made.
For example, in each of the above-described embodiments, a case where a stereoscopic image signal including a left-eye image and a right-eye image having a parallax in time sequence is input as an input image signal has been described as an example. The driving method in can be applied to other than stereoscopic image signals. In each of the above embodiments, the example in which screen scanning is performed at a speed 1.5 times that of the first driving mode in the second driving mode has been described. However, the scanning speed of the second driving mode is as follows. The speed is not limited to 1.5 times and may be other speeds.

  DESCRIPTION OF SYMBOLS 10,10A ... Timing controller (LCD controller), 11 ... Reception part, 12 ... Data processing circuit, 13 ... 1st memory controller, 14 ... Color correction circuit, 15 ... Overdrive circuit, 16 ... 2nd memory controller, DESCRIPTION OF SYMBOLS 17 ... Timing generator circuit part, 18 ... Control signal generation part, 19 ... Data formatter, 20 ... Transmission part, 21 ... 1st frame buffer, 22 ... External ROM, 23 ... 2nd frame buffer, 25 ... Temperature sensor, 26 ... Temperature determination circuit, 31 ... RGB-YUV encoder, 32 ... YUV-RGB decoder, 33 ... RGB-YUV encoder, 34 ... YUV-RGB decoder, 35 ... RGB-YUV encoder, 40 ... Display panel, 41 (41- 1, 41-2, ... 41-n) ... source driver 42 (42-1, 4) -2, ... 42-m) ... gate driver, 43 (43-1,43-2, ... 43-m) ... YUV-RGB decoder.

Claims (8)

A display panel having a plurality of pixels;
Drive that causes the display panel to display an image corresponding to an input image signal by performing scanning drive control of the display panel by selectively using two drive modes of the first drive mode and the second drive mode. Control means, and
The drive control means includes
In the second driving mode, the scanning period from the start of scanning for one screen on the display panel to the end of scanning for one screen is shorter than that in the first driving mode. Image display device designed to perform appropriate drive control. A temperature sensor for detecting an external temperature;
The drive control means is configured to perform scanning drive control in the second drive mode when the external temperature detected by the temperature sensor becomes higher than a predetermined temperature. Image display device. The drive control means includes
The image display device according to claim 1 or 2, wherein control is performed to display the same number of images within one frame period in the first drive mode and the second drive mode. The drive control means receives as the input image signal an image signal that includes a plurality of images in time sequence within one frame period,
In the second drive mode, the drive control means can arbitrarily set a time to start displaying each image within one frame period while keeping the number of images to be displayed within one frame period constant. The image display device according to claim 3. The drive control means includes
3. The image display device according to claim 1, wherein in the second drive mode, control is performed to increase the number of images to be displayed within one frame period as compared to the first drive mode. The drive control means receives an image signal including RGB signals as the input image signal,
The drive control means includes
An RGB-YUV encoder that converts an RGB image signal into a luminance signal Y and a color difference signal UV in a compressed state, and converts the compressed luminance signal Y and the color difference signal UV into the RGB image signal before compression. YUV-RGB decoder,
In the second drive mode, the data transmission speed is increased using the RGB-YUV encoder and the YUV-RGB decoder so that the scanning period is shorter than that in the first drive mode. The image display device according to claim 1, wherein the image display device is configured to perform control. Liquid crystal shutter glasses having a left-eye shutter and a right-eye shutter that can be opened and closed independently of each other,
As the input image signal, a stereoscopic image signal including a left-eye image and a right-eye image in time order is input to the drive control unit,
The drive control means performs control to alternately display a left-eye image and a right-eye image on the display panel in a time-sharing manner,
The liquid crystal shutter glasses enable stereoscopic viewing of the left-eye shutter and the right-eye shutter in synchronization with the display timing of the left-eye image and the right-eye image on the display panel. The image display device according to claim 1, wherein the image display device is configured to perform open / close control as described above. A display panel having a plurality of pixels is controlled by drive control means;
The drive control means is
By selectively using the two drive modes of the first drive mode and the second drive mode to perform scanning drive control of the display panel, an image corresponding to an input image signal is displayed on the display panel,
In the second driving mode, the scanning period from the start of scanning for one screen on the display panel to the end of scanning for one screen is shorter than that in the first driving mode. For driving an image display apparatus that performs various drive controls.

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