JP5100873B1 - Crosstalk correction amount evaluation apparatus and crosstalk correction amount evaluation method - Google Patents

Abstract

Crosstalk correction amount evaluation apparatus and crosstalk that can easily evaluate the correction amount visually when correcting a voltage level applied to a pixel by overdrive technology to reduce three-dimensional crosstalk To provide a correction amount evaluation method.
According to an embodiment, a crosstalk correction amount evaluation apparatus includes a correction unit and a display unit. The correction unit is configured to display a right-eye video and a left-eye video alternately on a liquid crystal display panel in units of frames and perform stereoscopic video display according to a combination of gradations of consecutive previous and subsequent frames. The three-dimensional crosstalk is reduced by correcting the voltage level applied to the pixels of the liquid crystal display panel. The display means displays a first evaluation pattern whose gradation is sequentially changed in the horizontal direction on one of the right-eye video and the left-eye video, and the same pattern as the first evaluation pattern on the other of the right-eye video and the left-eye video. A second evaluation pattern having a plurality of cells that are arranged in the vertical direction and whose gradation changes sequentially in the arrangement order is displayed.
[Selection] Figure 4

Description

  Embodiments described herein relate generally to a crosstalk correction amount evaluation apparatus and a crosstalk correction amount evaluation method for evaluating a correction amount for three-dimensional crosstalk in stereoscopic video display using a shutter glasses method.

  As is well known, conventionally, development of a technique for allowing a user to recognize a stereoscopic image using a flat image display screen has been advanced. This technology prepares two types of images having parallax corresponding to the distance between both eyes of a human and makes a right eye image visible to the user's right eye and a left eye image to be viewed by the user's left eye. Is to do.

  As an example, the right-eye video and the left-eye video are alternately displayed on the same video display screen, and the left-eye shutter is closed when the right-eye video is displayed for the stereoscopic glasses worn by the user. A so-called shutter glasses method that allows a user to recognize a stereoscopic video image by controlling the shutter of the right eye to be closed when displaying the video image has been put into practical use and has spread in the market.

  On the other hand, in recent years, video display devices using a liquid crystal display panel or the like for video display have become widespread. This video display device has a structure in which a liquid crystal display panel including a plurality of pixels arranged in a matrix is illuminated from the back side with a backlight having a cold cathode tube such as a fluorescent tube or a discharge lamp as a light source. ing.

  In this case, the liquid crystal display panel forms a video by applying a voltage of a level based on the video signal to each pixel and controlling the gradation (luminance) of each pixel. Then, by controlling the voltage level (or digital signal correction amount) applied to the pixel for each screen (frame) to be displayed, the gradation (luminance) of each pixel is continuously obtained over a plurality of frames. Can be changed.

  However, in the liquid crystal display panel, the speed at which the luminance (gradation) of the pixel changes may be slow depending on the response speed of the liquid crystal molecules. That is, the influence of the output video of the immediately preceding frame remains on the frame to be displayed at present, and the display state may be such that the frame to be currently displayed and the immediately preceding frame are displayed simultaneously. .

  In this case, in the stereoscopic image in which the right-eye image and the left-eye image are alternately displayed, the images having parallax are alternately displayed, so that the immediately preceding frame is superimposed on the current display frame and displayed. Then, so-called three-dimensional crosstalk occurs in which the user sees the video twice.

  For this reason, at present, the voltage level corresponding to the target luminance (gradation) is higher or lower in order to quickly reach the luminance (gradation) of the pixel to the target luminance (gradation). Three-dimensional crosstalk is reduced by using an overdrive technique called LAO (level adopted overdrive) that corrects the response speed of the liquid crystal by applying a voltage level to increase the rate of change of pixels. The crosstalk canceller has been put into practical use.

“Evaluation of Gray to Gray Performance in Stereoscopic Displays” Wen-Chuan Tsai, Meng-Huan Yang, Hung-Shiang Ruan, Chien-Wen Chen, Kai-Chieh Chang, Ko-Shun Wang, International Display Workshops 2010, pp1295-1298, 2010

  When reducing the three-dimensional crosstalk by correcting the voltage level applied to the pixel by the overdrive technology, the correction amount evaluation device and the crosstalk correction amount evaluation that can easily evaluate the correction amount visually. It aims to provide a method.

  According to the embodiment, the crosstalk correction amount evaluation apparatus includes a correction unit and a display unit. The correction unit is configured to display a right-eye video and a left-eye video alternately on a liquid crystal display panel in units of frames and perform stereoscopic video display according to a combination of gradations of consecutive previous and subsequent frames. The three-dimensional crosstalk is reduced by correcting the voltage level applied to the pixels of the liquid crystal display panel. The display means displays a first evaluation pattern whose gradation is sequentially changed in the horizontal direction on one of the right-eye video and the left-eye video, and the same pattern as the first evaluation pattern on the other of the right-eye video and the left-eye video. A second evaluation pattern having a plurality of cells that are arranged in the vertical direction and whose gradation changes sequentially in the arrangement order is displayed.

The block block diagram shown in order to demonstrate an example of the signal processing type | system | group of the video processing apparatus in embodiment. The block block diagram shown in order to demonstrate an example of the crosstalk canceller provided in the video processing part of the video processing apparatus in the embodiment. The figure shown in order to demonstrate an example of the correction table which comprises the crosstalk canceller in the embodiment. The figure shown in order to demonstrate an example of the evaluation pattern generate | occur | produced with the video processing apparatus in the embodiment. The figure shown in order to demonstrate an example of the state which looked at the evaluation pattern by which the video processing apparatus in the embodiment displayed the stereoscopic vision image without the glasses for stereoscopic vision. The figure shown in order to demonstrate an example of the state which looked at the evaluation pattern displayed by the video processing apparatus in the embodiment using the stereoscopic glasses. The figure shown in order to demonstrate the other example of the evaluation pattern generated with the video processing apparatus in the embodiment.

  Hereinafter, embodiments will be described in detail with reference to the drawings. FIG. 1 schematically shows a signal processing system of a video processing apparatus 11 described in this embodiment. The video processing apparatus 11 not only performs video display based on a normal planar view (two-dimensional) display video signal, but also performs video display based on a stereoscopic (three-dimensional) display video signal. Can do.

  In other words, the digital broadcast signal received by the antenna 12 is supplied to the tuner unit 14 via the input terminal 13 so that the broadcast signal of a desired channel is selected. The broadcast signal selected by the tuner unit 14 is supplied to the demodulation / decoding unit 15, restored to a digital video signal, audio signal, and the like, and then output to the signal processing unit 16.

  The signal processing unit 16 performs predetermined digital signal processing on the digital video signal and audio signal supplied from the demodulation / decoding unit 15. The predetermined digital signal processing performed by the signal processing unit 16 includes processing for converting a normal planar (two-dimensional) display video signal into a stereoscopic (three-dimensional) display video signal, and stereoscopic display. The video signal is converted into a video signal for planar display.

  The signal processing unit 16 outputs a digital video signal to the synthesis processing unit 17 and outputs a digital audio signal to the audio processing unit 18. Among these, the synthesis processing unit 17 superimposes and outputs an OSD (on screen display) signal on the digital video signal supplied from the signal processing unit 16. The digital video signal output from the synthesis processing unit 17 is supplied to the video processing unit 19.

  The video processing unit 19 converts the input digital video signal into a format that can be displayed on a flat-type video display unit 21 having, for example, a liquid crystal display panel. The video signal output from the video processing unit 19 is supplied to the video display unit 21 via the output terminal 20 and used for video display.

  In addition, when the video signal supplied from the synthesis processing unit 17 is a stereoscopic (three-dimensional) display video signal, the video processing unit 19 generates a right-eye video signal and a left-eye video signal from the video signal. The separated video signals are subjected to processing for alternately outputting at a double speed in units of frames, three-dimensional crosstalk reduction processing using overdrive technology, and the like.

  Furthermore, when the video signal supplied from the synthesis processing unit 17 is a video signal for stereoscopic (three-dimensional) display, the video processing unit 19 includes a period during which the right-eye video is displayed and a left-eye video. A shutter control signal SC indicating the period during which the image is displayed is generated and output to the stereoscopic glasses 23 via the output terminal 22.

  For this reason, the stereoscopic glasses 23 close the left-eye shutter when displaying the right-eye image and close the right-eye shutter when displaying the left-eye image based on the shutter control signal SC supplied from the image processing unit 19. As a result, the stereoscopic (three-dimensional) video is recognized by the user.

  The audio processing unit 18 converts the input digital audio signal into an analog audio signal in a format that can be reproduced by the speaker 25 at the subsequent stage. Then, the analog audio signal output from the audio processing unit 18 is supplied to the speaker 25 via the output terminal 24 to be used for audio reproduction.

  Here, in the video processing apparatus 11, all the operations including the above-described various reproduction operations are comprehensively controlled by the control unit 26. The control unit 26 includes a CPU (central processing unit) 26a, receives operation information from the operation unit 27 installed in the main body of the video processing apparatus 11, or is sent from the remote controller 28 and received by the reception unit. In response to the operation information received at 29, each unit is controlled so that the operation content is reflected.

  In this case, the control unit 26 uses the memory unit 26b. The memory unit 26b mainly includes a ROM (read only memory) storing a control program executed by the CPU 26a, a RAM (random access memory) for providing a work area to the CPU 26a, various setting information and control information. And so on.

  The control unit 26 is connected to a communication interface 30 compliant with a predetermined communication standard such as a USB (universal serial bus) standard, and an external electronic device 31 can be connected via the communication interface 30. It has become. Accordingly, the control unit 26 acquires digital video signals and audio signals from the external electronic device 31 based on the operation of the operation unit 27 and the remote controller 28 by the user, and supplies them to the above-described video display and audio reproduction. Can be controlled.

  Furthermore, a disk drive unit 32 is connected to the control unit 26. The disk drive unit 32 is a unit that allows an optical disk 33 such as a DVD (digital versatile disk) to be detachable, and has a function of reproducing digital data from the mounted optical disk 33.

  Therefore, the control unit 26 causes the disc drive unit 32 to read out digital video signals and audio signals from the optical disc 33 based on the operation of the operation unit 27 and the remote controller 28 by the user, and the video display and audio described above. It can be controlled to be used for reproduction.

  The control unit 26 is provided with an evaluation pattern generation unit 26c. Although the details will be described later, the evaluation pattern generation unit 26c corrects the voltage level applied to the pixels constituting the liquid crystal display panel of the video display unit 21 by the overdrive technique to reduce three-dimensional crosstalk. The right eye image and the left eye image alternately displayed on the image display unit 21 for the correction amount are viewed by the user wearing the stereoscopic glasses 23 in a so-called normal shutter glasses method for viewing the stereoscopic image. The video signal for displaying the evaluation pattern corresponding to the video for the right eye and the video for the left eye so that the evaluation can be easily performed is generated.

  FIG. 2 shows an example of a crosstalk canceller 34 for performing a three-dimensional crosstalk reduction process using the overdrive technique in the video processing unit 19. The crosstalk canceller 34 includes an input terminal 34a to which a right-eye video signal and a left-eye video signal for stereoscopic (three-dimensional) display are alternately input with a frame period.

  The right-eye video signal and the left-eye video signal input to the input terminal 34a are supplied to the correction table 34b and the frame memory 34c, respectively. Among these, the correction table 34b is a gradation (luminance) in a certain frame (previous frame) and a frame (subsequent frame) following that frame for a predetermined pixel constituting the liquid crystal display panel of the video display unit 21. The gradation (luminance) and the voltage level (or digital signal correction amount) applied to the pixel are stored in association with each other.

  FIG. 3 shows an example of the correction table 34b. That is, the vertical axis represents the gradation (luminance) of a predetermined pixel in the past frame, and the gradation (luminance) is arranged so as to increase from the upper side to the lower side. The horizontal axis indicates the gradation (luminance) of a predetermined pixel in the current frame, and the pixels are arranged so that the gradation (luminance) increases from the left to the right. Further, the numbers specified by the gradation (luminance) of the past frame and the gradation (luminance) of the current frame indicate the corrected voltage level applied to a predetermined pixel.

  When the gradation (luminance) of the pixel is controlled by, for example, 10 bits (0 to 1023), the correction table 34b includes the gradation (luminance) of the past frame and the gradation (luminance) of the current frame. It is necessary to prepare 1024 patterns for each. However, in order to reduce the memory capacity required for storing the correction table 34b, the correction amount is set by thinning out the gradation (luminance) of the past frame and the current frame by a predetermined amount (1/4 in FIG. 3). Can do.

  On the other hand, the frame memory 34c stores the gradation (luminance) of pixels for one frame of the supplied video signal. When video signals are supplied in consecutive frames, the frame memory 34c sequentially overwrites the video signal for one frame. Further, when the video signal is supplied, the frame memory 34c outputs the already stored video signal to the correction table 34b.

  As a result, the video signal of a certain frame (past frame or previous frame) output from the frame memory 34c and supplied to the input terminal 34a, which becomes the next frame (current frame or subsequent frame) of that frame, are supplied. The processed video signal is supplied to the correction table 34b. Then, the correction table 34b outputs a voltage level designated by a gradation (luminance) in the past frame and a gradation (luminance) in the current frame for a predetermined pixel, and this voltage level is output to the output terminal 34D. To be applied to the pixel. That is, the correction table 34b outputs a voltage level corresponding to a combination of the gradation (luminance) of the past frame and the gradation (luminance) of the current frame for a predetermined pixel, thereby applying a voltage level to the pixel. Is corrected.

  Here, the above-described crosstalk canceller 34 has the gradation (luminance) of the preceding and following frames for a predetermined pixel among all the pixels constituting the liquid crystal display panel of the video display unit 21. By correcting the voltage level to be applied according to the combination of the three, the three-dimensional crosstalk can be reduced in the stereoscopic image display of the shutter glasses method.

  Next, the correction amount when the three-dimensional crosstalk is reduced by correcting the voltage level applied to each pixel by the evaluation pattern displayed based on the video signal generated by the evaluation pattern generation unit 26c is visually confirmed. Will be described. That is, the evaluation pattern generation unit 26c generates a stereoscopic video signal in which a left-eye video signal and a right-eye video signal for displaying a predetermined evaluation pattern are combined in a side-by-side format.

  Here, the side-by-side format will be described, but the side-by-side format is not necessarily required, and a top-and-bottom format or a frame packing format may be used. Further, since it is held internally, the left-eye video signal and the right-eye video signal may be independently provided.

  The stereoscopic video signal is separated into a right-eye video signal and a left-eye video signal by the video processing unit 19, and the video signal is alternately output at a double speed at a frame period. Then, a three-dimensional crosstalk reduction process using overdrive technology is performed.

  Then, the right-eye video signal and the left-eye video signal output from the video processing unit 19 are alternately displayed on the video display unit 21, and the display video is viewed by the user wearing the stereoscopic glasses 23. The correction amount of the voltage level applied to the pixel in the talk canceller 34 can be visually evaluated.

  FIG. 4 shows an example of the left-eye video L and the right-eye video R displayed by the video signal generated by the evaluation pattern generation unit 26c. First, in the left-eye video L, a strip-shaped left-eye evaluation pattern L1 having a certain width is displayed in the vertical direction in the horizontal central portion of the black screen. The left-eye evaluation pattern L1 is displayed in gray scale, and is displayed so that gradation (luminance) sequentially increases from left to right in the horizontal direction of the screen.

  In the right-eye video R, a strip-shaped right-eye evaluation pattern R1 having a constant width similar to that of the left-eye evaluation pattern L1 is displayed in the vertical direction at the central portion of the black screen in the horizontal direction. This right-eye evaluation pattern R1 is also displayed in gray scale, and is displayed so that gradation (luminance) sequentially increases from left to right in the horizontal direction of the screen.

  Here, the right eye evaluation pattern R1 is the same as the left eye evaluation pattern L1 in the lower half on the screen. However, the right eye evaluation pattern R1 has a plurality of cells formed in the upper half on the screen. The plurality of cells are arranged in a matrix at regular intervals in the horizontal direction and the vertical direction, and each cell has the same size and the same shape.

  The plurality of cells are displayed in such a manner that the gradation (luminance) sequentially increases in the order of arrangement from the upper cell to the lower cell on the screen. Further, the plurality of lines provided in parallel in the horizontal direction and the vertical direction constituting the plurality of cells are similar to the left eye evaluation pattern L1 in the horizontal direction of the screen from the left side to the right side. The tone (luminance) is displayed so as to increase sequentially.

  Here, the left-eye video L and the right-eye video R are the same video in the lower half of the screen because the left-eye evaluation pattern L1 and the right-eye evaluation pattern R1 in the lower half of the screen are the same. For this reason, even if a continuous frame of the left-eye video L and the right-eye video R is supplied to the crosstalk canceller 34, the voltage level is corrected by the overdrive technique for the pixels in the lower half of the screen. Therefore, it is possible to visually check the reference gradation (luminance) gamma.

  In the upper half of the screen, the left eye evaluation pattern L1 changes in gradation (brightness) in the horizontal direction, and the right eye evaluation pattern R1 has a plurality of squares (square portions in the pattern) in the vertical direction. The gradation (luminance) has changed. Therefore, when the user wears the stereoscopic glasses 23 and sees only with the left eye, if the 3D crosstalk reduction processing by the crosstalk canceller 34 functions well, that is, the voltage level applied to the pixel If the correction amount is appropriate, the left-eye video L can be seen as it is. That is, the upper half of the left eye evaluation pattern L1 looks the same as the lower half.

  Further, the gradation (brightness) of the left eye evaluation pattern L1 sequentially increases from the left side to the right side, and the gradation (luminance) of the right eye evaluation pattern R1 increases from the upper side to the lower side. It is changing to increase sequentially. Therefore, the gradation (luminance) of the rear frame is arranged so as to increase sequentially from the left side to the right side, and the gradation (luminance) of the previous frame is arranged so as to increase sequentially from the upper side to the lower side. The correspondence with the table 34b is easy to understand.

  Further, the gradation values of a plurality of lines provided in parallel in the vertical direction constituting the plurality of cells of the right-eye evaluation pattern R1 are stored in a table for correcting the voltage level applied by the crosstalk canceller 34. The coordinates of the multiple lines that are equal to the current frame's gradation value and that are arranged in parallel in the horizontal direction forming the plurality of cells are gradation values in which the gradation (luminance) sequentially increases inside the cells. Is designed to be equal to the gradation value of the previous frame of the table for correcting the voltage level applied by the crosstalk canceller 34.

  In a plurality of line portions provided in parallel in the vertical direction constituting a plurality of cells, as in the left-eye evaluation pattern L1, gradation (luminance) from the left side to the right side in the horizontal direction of the screen Are displayed so as to increase sequentially, the gradation value is different, but the inside of the surrounding square is very close to the gradation value, and the correspondence between the corrected gradation value and the correction table 34b The relationship becomes easy to understand.

  Furthermore, since humans perceive brightness as a relative value, it is impossible to visually detect luminance fluctuations unless there is a comparison target. However, in this embodiment, a plurality of squares in the right-eye evaluation pattern R1 are vertical. The gradation (luminance) is changed in the direction, and the gradation (luminance) is changed in the horizontal direction for a plurality of horizontal and vertical lines constituting the cell as in the left eye evaluation pattern L1. Therefore, the luminance can be relatively compared in the evaluation pattern.

  Therefore, when the left-eye video L and the right-eye video R are alternately displayed and the user sees without wearing the stereoscopic glasses 23, as shown in FIG. When the user looks with the glasses for stereoscopic vision 23, as shown in FIG. 6, when the correction amount is appropriate, the grid becomes invisible. In FIG. 6, the portion where the grid is visible indicates a case where the correction amount is insufficient or excessive.

  When the current frame increases from the previous frame (upper right in the pattern), overcorrection occurs when the inside of the cell (the square part in the pattern) is bright, and underemphasis occurs when it is dark. Conversely, when the current frame decreases from the previous frame (lower left in the pattern), under-emphasis is insufficient when the inside of the cell is bright, and overcorrection when dark.

  Further, when the left-eye evaluation pattern L1 and the right-eye evaluation pattern R1 are displayed in gray scale, the color balance of R (red), G (green), and B (blue) is changed by coloring the display image. You can see that it collapsed.

  Furthermore, although the description has been made so that the left eye and the right eye are different inside the square (the square part in the pattern), the pattern may be configured such that the portions of the plurality of lines constituting the square are different between the left eye and the right eye. Is.

  In the above-described embodiment, the plurality of cells in the right-eye evaluation pattern R1 have a quadrangular shape configured by intersecting a plurality of lines provided in parallel in the horizontal direction and the vertical direction. Not limited to this, it may be arranged regularly at equal intervals in the horizontal and vertical directions so that the luminance can be relatively compared in the evaluation pattern. It is possible to form in the shape.

  In addition, the pixels for which the voltage level applied by the crosstalk canceller 34 is to be corrected are a plurality of pixels provided in parallel in the horizontal direction and the vertical direction constituting the plurality of cells of the right-eye evaluation pattern R1. Not only the pixels corresponding to the intersections of the lines, but can be arbitrarily set as required.

  Further, the left-eye evaluation pattern L1 and the right-eye evaluation pattern R1 maintain the relationship that when the left-eye video L and the right-eye video R are alternately displayed, they are displayed at the same position on the screen. Thus, by making it possible to change the display position within the screen, it becomes possible to visually evaluate the correction amount when reducing the three-dimensional crosstalk for the entire area of the screen.

  In the above-described embodiment, a plurality of cells are formed in the right-eye evaluation pattern R1, but it is needless to say that a plurality of cells may be formed in the left-eye evaluation pattern L1.

  Furthermore, the evaluation pattern can be displayed not only in gray scale but also independently for each of R, G, and B. In this case, as shown in FIG. 7, in the left-eye video L, the left-eye R evaluation pattern is formed in a band with a constant width in the central portion of the black screen, similar to the left-eye evaluation pattern L1 described above. L (R) 1, left eye G evaluation pattern L (G) 1, and left eye B evaluation pattern L (B) 1 are displayed side by side in the vertical direction.

  Further, in the right-eye video R, the right-eye R evaluation is formed in a band with a constant width in the center portion of the black screen so as to correspond to the left-eye video L in the same manner as the above-described right-eye evaluation pattern R1. Pattern R (R) 1, right eye G evaluation pattern R (G) 1, and right eye B evaluation pattern R (B) 1 are displayed side by side in the vertical direction.

  In this case, a crosstalk canceller is provided for each of the R component, the G component, and the B component. Then, by using the left-eye R evaluation pattern L (R) 1 and the right-eye R evaluation pattern R (R) 1, the correction amount for the crosstalk canceller that performs the three-dimensional crosstalk reduction processing on the R component is visually determined. Evaluation is performed.

  In addition, the correction amount for the crosstalk canceller that performs a three-dimensional crosstalk reduction process for the G component using the left-eye G evaluation pattern L (G) 1 and the right-eye G evaluation pattern R (G) 1 is visually displayed. Evaluation is performed. Further, the correction amount for the crosstalk canceller that performs the three-dimensional crosstalk reduction process for the B component using the left-eye B evaluation pattern L (B) 1 and the right-eye B evaluation pattern R (B) 1 is visually displayed. Evaluation is performed. As a result, the influence of white balance and the like can be visually evaluated for easy understanding.

  In addition, when the pixels constituting the screen have colors other than RGB, evaluation can be performed using a pattern for the color.

  Note that the present invention is not limited to the above-described embodiments as they are, and can be embodied by variously modifying the constituent elements without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements according to different embodiments may be appropriately combined.

  DESCRIPTION OF SYMBOLS 11 ... Video processing apparatus, 12 ... Antenna, 13 ... Input terminal, 14 ... Tuner part, 15 ... Demodulation decoding part, 16 ... Signal processing part, 17 ... Synthesis processing part, 18 ... Audio | voice processing part, 19 ... Video processing part, DESCRIPTION OF SYMBOLS 20 ... Output terminal, 21 ... Image | video display part, 22 ... Output terminal, 23 ... Stereoscopic glasses, 24 ... Output terminal, 25 ... Speaker, 26 ... Control part, 26a ... CPU, 26b ... Memory part, 26c ... Evaluation pattern Generating unit 27 ... Operation unit 28 ... Remote controller 29 ... Receiving unit 30 ... Communication interface 31 ... Electronic device 32 ... Disc drive unit 33 ... Optical disc 34 ... Crosstalk canceller 34a ... Input terminal 34b ... correction table, 34c ... frame memory, 34d ... output terminal.

Claims (7)

When displaying a stereoscopic video display by alternately displaying a right-eye video and a left-eye video on a liquid crystal display panel in units of frames, the liquid crystal display panel according to a combination of gradations of successive front and rear frames Correcting means for reducing the three-dimensional crosstalk by correcting the voltage level applied to the pixel;
A first evaluation pattern whose gradation is sequentially changed in the horizontal direction is displayed on one of the right-eye video and the left-eye video, and the same pattern as the first evaluation pattern is displayed on the other of the right-eye video and the left-eye video. And a display means for displaying a second evaluation pattern having a plurality of cells which are arranged in the vertical direction and whose gradation changes sequentially in the arrangement order.   The display means displays a first evaluation pattern in which gradation gradually increases from one side to the other in the horizontal direction, and is arranged in the same direction as the first evaluation pattern in the vertical direction and is arranged on the upper side of the screen. The crosstalk correction amount evaluation apparatus according to claim 1, wherein a second evaluation pattern having a plurality of cells whose gradations sequentially increase in order of arrangement from the bottom to the bottom is displayed.   The display means crosses a plurality of lines provided in parallel in the horizontal direction and the vertical direction to form a plurality of cells, and displays the plurality of lines so that the gradation changes sequentially in the horizontal direction. The crosstalk correction amount evaluation apparatus according to claim 1, wherein the plurality of cells are displayed so that gradations are sequentially changed in an arrangement order from an upper cell to a lower cell on the screen.   The crosstalk correction amount evaluation apparatus according to claim 1, wherein the display means displays the first evaluation pattern and the second evaluation pattern in gray scale.   The crosstalk correction amount evaluation apparatus according to claim 1, wherein the display unit displays the first evaluation pattern and the second evaluation pattern separately for each of R, G, and B components.   2. The crosstalk correction amount according to claim 1, wherein the correction unit includes a correction table in which a voltage level to be given is specified by a gradation of a previous frame and a gradation of a subsequent frame for a predetermined pixel of the liquid crystal display panel. Evaluation device. When displaying a stereoscopic video display by alternately displaying a right-eye video and a left-eye video on a liquid crystal display panel in units of frames, the liquid crystal display panel according to a combination of gradations of successive front and rear frames When reducing the three-dimensional crosstalk by correcting the voltage level applied to the pixel of
A first evaluation pattern whose gradation is sequentially changed in the horizontal direction is displayed on one of the right-eye video and the left-eye video, and the same pattern as the first evaluation pattern is displayed on the other of the right-eye video and the left-eye video. And a crosstalk correction amount evaluation method for displaying a second evaluation pattern having a plurality of cells which are arranged in the vertical direction and whose gradation changes sequentially in the arrangement order.

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