KR20190124376A - 3-dimensional image display device and driving method thereof - Google Patents

Abstract

The present invention relates to a 3D image display device and a driving method thereof capable of reducing crosstalk between a left eye image and a right eye image. A 3D image display device according to an exemplary embodiment corrects the data of a white pixel by applying a crosstalk value calculated by measuring the luminance of the white pixel at each time point. So, crosstalk is reduced without color distortion while the white pixel improves luminance. The perceived image quality of the 3D image can be improved. The 3D image display device includes a panel, a 3D optical filter, a panel driving part, and an image processing part.

Description

Stereoscopic Display and Driving Method {3-DIMENSIONAL IMAGE DISPLAY DEVICE AND DRIVING METHOD THEREOF}

The present invention relates to a stereoscopic image display apparatus and a driving method thereof capable of reducing crosstalk between a left eye image and a right eye image.

The stereoscopic image display device spatially or temporally separates the left eye image and the right eye image displayed on the panel so that the viewer can project the three-dimensional (3D) image having a three-dimensional effect by the left and right disparity images. have.

The stereoscopic image display apparatus is largely divided into a glasses method and a glasses-free method, and the glasses method has an uncomfortable way for a user's convenience because the viewer needs to wear special glasses.

The autostereoscopic 3D display device spatially separates the left and right eye optical paths through a 3D optical filter such as a parallax barrier or a lenticular lens disposed on the front of the panel. Provided to the viewer's left eye and right eye, respectively.

However, in the stereoscopic image display device, crosstalk is generated in which the left eye image and the right eye image are mixed at each viewpoint of the left and right eyes due to the viewer's position, viewing angle, light diffraction, design value, and process error. It may cause deterioration and motion sickness of 3D video.

In the parallax barrier type stereoscopic display device, a part of light is blocked by a barrier for separating the optical paths of the left eye image and the right eye image, so that the brightness of the image is lowered. Improvement measures are being applied.

However, a problem arises in that the absolute value of each crosstalk of the left and right eyes is further increased by the addition of the white pixel.

In the stereoscopic image display device other than the parallax barrier method, crosstalk may increase due to the addition of white pixels.

The present invention provides a stereoscopic image display device including a white pixel and capable of reducing crosstalk between a left eye image and a right eye image, and a driving method thereof.

According to an exemplary embodiment, a stereoscopic image display apparatus includes a panel, a 3D optical filter, a panel driver, and an image processor. The image processor according to an exemplary embodiment corrects achromatic data except for chromatic color data among the supplied first left eye image signal and the first right eye image signal by applying a crosstalk value stored in a memory, and includes corrected achromatic data and chroma color data. The second left eye image signal and the second right eye image signal are output to the panel driver.

The image processor may include a color space converter configured to convert three color data of each of the first left eye image signal and the first right eye image signal into left eye four color data and right eye four color data, and left eye four color data and right eye four. Each of the left eye white data and the right eye white data of the color data is corrected by applying a corresponding crosstalk value stored in the memory, and includes a corrected left eye white data, corrected right eye white data, left eye tricolor data, and right eye tricolor data. And a crosstalk correction unit configured to output a second left eye image signal and a second right eye image signal.

The image processor may further include a degamma correction unit configured to degamma correct the supplied first left eye image signal and the first right eye image signal to a color space converter, and a second left eye image signal and a second left eye image signal supplied from a crosstalk correction unit. The apparatus further includes a color temperature correction unit configured to correct and output the right eye image signal, and a gamma correction unit configured to gamma correct the output signal of the color temperature correction unit and output the gamma correction signal to the panel driver.

When a stereoscopic image display device displays a reference image as one monocular image among a left eye image and a right eye image displayed on a panel, and displays a variable image in which input data is variable as the other monocular image, the variable image Accordingly, only the luminance of the achromatic pixels is changed without changing the luminance of the chroma pixels among the pixels displaying the reference image.

According to an exemplary embodiment, a method of driving a stereoscopic image display device includes converting three color data of each of a first left eye image signal and a second right eye image signal into left eye four color data and right eye four color data; Correcting the left eye white data and the right eye white data of the right eye four color data by applying a corresponding crosstalk value, a second left eye image signal including the corrected left eye white data and three color data of the left eye four color data; Outputting a second right eye image signal including three color data among the corrected right eye white data and the right eye four color data; correcting and displaying the color temperature of the second left eye image signal and the second right eye image signal on a panel; It includes.

Correcting the left eye white data and the right eye white data may include subtracting a result of multiplying the first crosstalk value and the right eye white data selected corresponding to the left eye white data and the right eye white data from the first crosstalk LUT from the left eye white data. And subtracting, from the first right eye white data, a result of multiplying the second crosstalk value and the left eye white data selected corresponding to the right eye white data and the left eye white data from the second crosstalk LUT.

According to an exemplary embodiment, a stereoscopic image display device and a driving method thereof correct a data of a white pixel by applying a crosstalk value calculated by measuring a luminance of a white pixel at each time point, thereby improving luminance by the white pixel at each time point. The crosstalk between the left eye image and the right eye image may be reduced to improve the perceived image quality of the 3D image.

According to an exemplary embodiment, a stereoscopic image display device and a driving method thereof may reduce crosstalk without color distortion by applying crosstalk correction only to non-chromatic white pixels.

1 is a block diagram of a stereoscopic image display device according to an embodiment of the present invention.
2 is a diagram illustrating a parallax barrier method of a stereoscopic image display device applied to an embodiment of the present invention.
3 is a diagram illustrating various pixel arrangement structures of a panel applied to an embodiment of the present invention.
4 is a view showing a crosstalk measurement method according to an embodiment of the present invention.
5 is a graph illustrating a crosstalk measurement result according to an exemplary embodiment of the present invention.
6 is a block diagram illustrating a configuration of an image processor of a stereoscopic image display device according to an exemplary embodiment.
7 is a flowchart illustrating an image processing method of a stereoscopic image display device according to an exemplary embodiment.
8 is a diagram illustrating a crosstalk correction process of a stereoscopic image display device according to an embodiment of the present invention.
9 illustrates the cognitive crosstalk reduction effect of the stereoscopic image display device according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a block diagram illustrating a configuration of a stereoscopic image display device according to an embodiment of the present invention.

Referring to FIG. 1, the stereoscopic image display apparatus 1000 connected to the host system 2000 may include a panel 100, a gate driver 200, a data driver 300, a timing controller 400, and a gamma voltage generator ( 500, a 3D optical filter 700, and the like disposed on one surface of the panel 100.

The host system 2000 may be any one of a system of a portable terminal such as a computer, a TV system, a set top box, a tablet or a mobile phone. The host system 2000 supplies the left eye image signal and the right eye image signal to the timing controller 400 of the stereoscopic display device 1000 along with the timing control signals. The timing control signals may include a dot clock, a data enable signal, a vertical sync signal, a horizontal sync signal, and the like.

In the stereoscopic image display apparatus 1000, the panel 100 displays an image through a pixel array in which a plurality of white (W), red (R), green (G), and blue (B) pixels are arranged. The pixels may be divided into left eye pixels displaying a left eye image and right eye pixels displaying a right eye image. In the panel 100, the left eye pixels and the right eye pixels are alternately line-by-line in column, row, or slanted lines. It can be arranged as.

The panel 100 may be any one of various display panels, such as a liquid crystal display (LCD) panel, an organic light emitting diode (OLED) panel, and the like.

The 3D optical filter 700 is disposed on the front or rear of the panel 100 to separate the optical paths of the left eye image and the right eye image displayed on the panel 100 to provide the left eye image and the right eye image of the viewer. do. When the panel 100 is an LCD panel, the 3D optical filter 700 may be disposed in front of the panel 100, in a backlight unit located at the rear of the panel 100, or between the panel 100 and the backlight unit. Can be arranged. When the panel 100 is an OLED panel, the 3D optical filter 700 may be disposed in front of the panel 100.

As shown in FIG. 2, the 3D optical filter 700 is a parallax barrier that separates light paths of a left eye image and a right eye image by alternately arranging a slit through which light passes and a barrier blocking light, or a semi-cylindrical lens. The lens may be one of a lenticular lens that refracts the optical paths of the left eye image and the right eye image in different directions using a half-cylindrical lens or a fresnel lens. The 3D optical filter 700 may be any one of a switchable barrier and a switchable lens operating in a 2D mode or a 3D mode by driving a liquid crystal or the like under the control of the timing controller 400. Can be.

Referring to FIG. 2, the panel 100 alternately includes a left eye pixel L displaying a left eye image and a right eye pixel R displaying a right eye image, and are arranged in front of the panel 100. The lax barrier 700 causes the optical path of the left eye image displayed on the left eye pixel L to progress to the viewer's left eye view through the slits alternately located with the barrier, and the right eye image displayed on the right eye pixel R is displayed. Allows the light path to proceed to the viewer's right eye view.

3 is a diagram illustrating various pixel arrangement structures of a panel applied to an embodiment of the present invention.

Referring to FIG. 3, pixels of the odd column lines C1, C3, C5 and C7 may display a left eye image, and pixels of the even column lines C2, C4, C6 and C8 may display a right eye image. have. The pixels displaying the left eye image include W, R, G, and B pixels, and the pixels displaying the right eye image also include W, R, G, and B pixels.

For example, as shown in FIG. 3A, the pixels of the left eye first column line C1 and the right eye fourth column line C4 are arranged in a repeating R / W / B / G order. The right eye second column line C2 and the left eye third column line C3 are arranged in a B / G / R / W order, and the first to fourth column lines C1 to C4 The batch structure is equally applied to the fifth to eighth column lines C5 to C8 groups.

Referring to FIG. 3B, the pixels of the left eye first column line C1 and the right eye second column line C2 are arranged in a B / W / R / G order, and the third column for the left eye The pixels of the line C3 and the fourth column line C4 for the right eye are arranged in a repeating R / G / B / W order, and the arrangement structure of the groups of the first to fourth column lines C1 to C4 is fifth. The same applies to the eighth through eighth column lines C5 to C8.

Referring to FIG. 3C, the pixels of the left eye first column line C1 are arranged in a repeating order of B / W / R / G pixels, and the pixels of the right eye second column line C2 are W. The pixels of the third column line C3 for the left eye are disposed while repeating the / B / G / R order, and the pixels of the fourth column line C4 for the right eye are arranged while repeating the R / G / B / W order for the left eye. Are arranged in a repeating G / R / W / B order, and the arrangement structure of the first to fourth column lines C1 to C4 groups is equally applied to the fifth to eighth column lines C5 to C8 groups. do.

In the stereoscopic display device 1000 illustrated in FIG. 1, the gate driver 200 and the data driver 300 may be represented as a panel driver that drives the panel 100.

The gate driver 200 receives a plurality of gate control signals from the timing controller 400 to perform a shift operation to individually drive the gate lines of the panel 100. The gate driver 200 supplies a scan signal of a gate-on voltage to a corresponding gate line in a driving period of each gate line, and supplies a gate-off voltage to a corresponding gate line in a non-driving period of each gate line.

According to an exemplary embodiment, the gate driver 200 includes one or a plurality of gate integrated circuits (ICs), and gate ICs are individually mounted on a circuit film such as a chip on film (COF), and the TAB (Tab) The tape may be bonded and connected by a tape automatic bonding (COP) method or may be mounted on the panel 100 by a COG (chip on glass) method. Meanwhile, the gate driver 200 according to an exemplary embodiment is formed on a substrate together with a thin film transistor array constituting a pixel array of the panel 100, so that the gate driver 200 may be formed in a non-display area of both sides or one side of the panel 100. In Panel) type.

The gamma voltage generator 500 generates and supplies a reference gamma voltage set including a plurality of reference gamma voltages having different voltage levels to the data driver 300. The gamma voltage generator 500 may adjust the reference gamma voltage level under the control of the timing controller 400.

The data driver 300 is controlled according to a data control signal supplied from the timing controller 400, and converts digital data supplied from the timing controller 400 into an analog data signal and supplies the data data to the data lines of the panel 100. . In this case, the data driver 300 converts the digital data into an analog data signal using the gray level voltages of the plurality of reference gamma voltages supplied from the gamma voltage generator 500 and converts the analog data signal into the data of the panel 100. To the lines.

The data driver 300 includes a plurality of data ICs, and the data ICs are individually mounted on a circuit film, such as a chip on film (COF), and bonded to the panel 100 by a tape automatic bonding (TAB) method. Chip On Glass) can be mounted on the panel 100.

The timing controller 400 receives timing control signals from the host system 2000. The timing controller 400 generates a plurality of data control signals for controlling the driving timing of the data driver 300 by using the received timing control signals and timing setting information stored therein, and supplies them to the data driver 300. In addition, a plurality of gate control signals for controlling the driving timing of the gate driver 200 are generated and supplied to the gate driver 400.

The timing controller 400 receives the left eye image signal and the right eye image signal from the host system 2000, and corrects 3D crosstalk using the achromatic pixel data excluding the chroma pixel through the built-in image processor 600, and corrects the left eye. The video signal and the right eye video signal are output to the data driver 300.

The image processing unit 600 converts the color spaces of the supplied left eye and right eye image signals from the tri-color (RGB) color space to the four-color (WRGB) color space, and then, among the four color (WRGB) data, white (W) The data is corrected by applying a preset crosstalk value, and the left eye image signal and the right eye image signal including the corrected W data are output to the data driver 300. A detailed description of the image processor 600 will be described later.

Meanwhile, the image processor 600 may be separated from the timing controller 400 and positioned at an input terminal of the timing controller 400. After correcting crosstalk of the left eye image signal and the right eye image signal through the above-described image processing, The corrected left eye image signal and right eye image signal may be output to the data driver 300 via the timing controller 400.

Crosstalk between the left eye image and the right eye image occurs due to a design error, diffraction, or the like of the stereoscopic image display device. In the pre-shipment inspection process, the crosstalk value is calculated by measuring the luminance of the stereoscopic image display device and stored in the memory of the image processing unit 600 in the form of a look-up table (LUT).

4 is a diagram illustrating a crosstalk measurement method of a stereoscopic image display device according to an embodiment of the present invention, and FIG. 5 is a diagram illustrating a crosstalk measurement result of a stereoscopic image display device according to an embodiment of the present invention. It is a graph.

Referring to FIG. 4, the inspection system including the measuring device 900 supplies left and right eye test images to the stereoscopic display device 1000 so that the left and right eye test images are respectively provided to the left and right eye white pixels. To be displayed. The inspection system moves the measuring instrument 900 in the horizontal axis direction of the stereoscopic display device 1000 at the viewing distance in the 3D design, and measures the luminance of the white pixels at each viewing point by block 110 at each viewing angle. As shown in FIG. 2, luminance values of the white pixels are obtained at each of the left eye and the right eye according to the viewing angle.

Subsequently, the inspection system calculates the 3D crosstalk value of each viewpoint according to the viewing angle using the luminance values of the measured white pixels of each viewpoint, and shows the minimum value among the calculated crosstalk values. Are stored as crosstalk values for the left eye and right eye white input data.

The inspection system repeats the above-described luminance measurement and crosstalk value detection operation using the left eye and right eye test images for each gray level, and stores the minimum crosstalk value for each gray level as crosstalk values for the corresponding left eye and right eye white input data. The crosstalk LUT for the right eye and the crosstalk LUT for the right eye are respectively generated and stored in a memory used by the image processor 600 in the stereoscopic image display device.

In the left eye crosstalk LUT, the minimum crosstalk values for the left eye and right eye white input data measured at the left eye viewpoint are stored for each gray level, and used for crosstalk correction of the white data of the left eye image. In the right eye crosstalk LUT, the minimum crosstalk values for the right eye and left eye white input data measured at the right eye point are stored for each gray level and used for crosstalk correction of the white data of the right eye image.

6 is a block diagram illustrating an image processing unit of a stereoscopic image display device according to an embodiment of the present invention. FIG. 7 is a flowchart illustrating an image processing method of a stereoscopic image display device according to an embodiment of the present invention. Is a crosstalk correction process of an image processor according to an embodiment of the present invention as an image, which will be described below with reference to FIGS. 6 to 8.

Referring to FIG. 6, the image processor 600 may include a de-gamma corrector 610, a color space converter 620, a crosstalk corrector 630, a color temperature corrector 640, and a gamma beam. A government 650 and a memory 660 may be included.

The degamma correction unit 610 receives a left eye image signal and a right eye image signal as illustrated in FIG. 8. The degamma correction unit 60 degamma corrects the supplied left eye image signals and right eye image signals Left_in and Right_in to output degamma corrected left eye image signals and right eye image signals Left_rgb and Right_rgb (S702). The degamma correction unit 610 uses the degamma LUT to convert tricolor data, which is a non-linear color value of the left eye image signal and the right eye image signals Left_in and Right_in, into three-color luminance data (Left_rgb, Right_rgb) of linear color values ( Hereinafter, the data is converted into three color data and output to the color space conversion unit 620 (S702).

The color space converter 620 converts the three-color data (Left_rgb, Right_rgb) of the left-eye image and the right-eye image supplied from the degamma correction unit 610 into four-color data (Left_WRGB, Right_WRGB) and crosstalk corrector 630. (S704). The color space converter 620 may convert three-color data Left_rgb and Right_rgb into four-color data Left_WRGB and Right_WRGB using one of various three-color to four-color conversion methods.

For example, the color space converter 620 multiplies the maximum value (max (r, g, b)) of the three color data by 0.5 and the minimum value of the three color data (min (r) as shown in Equation 1 below. , g, b)) may be set as the white data W as a result of dividing a small value by the frame maximum value (frame_max). The color space converter 620 subtracts the white data W from each of the remaining three color data r, g, and b, and then divides the result value divided by the frame maximum value frame_max into the three color data R, G, and B. Each can be set with).

<Equation 1>

W = min {min (r, g, b), 0.5 * max (r, g, b)} / frame_max

R = (r-W) / frame_max

G = (g-W) / frame_max

B = (b-W) / frame_max

The crosstalk correction unit 630 divides the left eye image signal and the right eye image signal Left_WRGB, Right_WRGB and the chromatic data (Left_RGB, Right_RGB) from the color space converter 620 into achromatic data (Left_W, Right_WGB), The achromatic white data Left_W and Right_W perform crosstalk correction (S706). The crosstalk correction unit 630 buffers the chromatic color data Left_RGB and Right_RGB without correction and outputs the color temperature correction unit 640 together with the corrected white data Left_W 'and Right_W'.

The crosstalk correction unit 630 extracts white data Left_W and Right_W of the left eye image and the right eye image from the supplied left eye image signals and the right eye image signals Left_WRGB and Right_WRGB, as illustrated in FIG. 8. The crosstalk for Left_W, Right_W) is corrected.

The crosstalk correction unit 630 uses the left and right eye white data (Left_W, Right_W) and the left and right eye crosstalk LUTs (Left_LUT, Right_LUT) stored in the memory 670 to crosstalk the left eye white data (Left_W). Performs correction and crosstalk correction on the right eye white data (Right_W).

The crosstalk correction unit 630 corrects the left eye white data Left_W by applying the first crosstalk value selected from Left_LUT of the memory 660, and applies the second crosstalk value selected from Right_LUT to the right eye white data Right_W. )

For example, the crosstalk correction unit 630 selects a first crosstalk value corresponding to the left eye white data Left_W and the right eye white data Right_W from Left_LUT, and selects the first crosstalk selected as in Equation 2 below. The first crosstalk correction value Right_W * Left_CT is calculated by multiplying the value Left_CT by the right eye white data Right_W. The crosstalk correction unit 630 performs crosstalk correction on the left eye white data Left_W by subtracting the first crosstalk correction value Right_W * Left_CT from the left eye white data Left_W.

<Equation 2>

Left_W '= Left_W- (Right_W * Left_CT)

Right_W '= Right_W- (Left_W * Right_CT)

Similarly, the crosstalk correction unit 630 selects the second crosstalk value Right_CT corresponding to the right eye white data Right_W and the right eye white data Left_W in Right_LUT, and selects the selected second formula as shown in Equation 2 above. The second crosstalk correction value Left_W * Right_CT is calculated by multiplying the crosstalk value Right_CT by the left eye white data Left_W. The crosstalk correction unit 630 performs crosstalk correction on the right eye white data Right_W by subtracting the second crosstalk correction value Left_W * Right_CT from the right eye white data Right_W.

The crosstalk correction unit 630 includes a left eye image signal and a right eye image signal (Left_W'RGB, Right_W'RGB) including white data (Left_W ', Right_W') with crosstalk correction and buffered chromatic data (Left_RGB, Right_RGB). ) Is output to the color temperature correction unit 640.

The color temperature correction unit 640 corrects the color temperature of the left eye image signal and the right eye image signals Left_W'RGB and Right_W'RGB supplied from the crosstalk correction unit 630, and corrects the corrected left eye image signal and right eye image signal ( Left'_WRGB, Right'_WRGB) are output to the gamma correction unit 650 (S708). The color temperature correction unit 640 may correct the color temperature of the white light by the four color combinations to the target color temperature by adjusting the chromatic color data Left_RGB and Right_RGB according to the white data Left_W 'and Right_W'.

The gamma correction unit 650 gamma-corrects the left eye image signal and the right eye image signals Left'_WRGB and Right'_WRGB received from the color temperature correction unit 640 to perform gamma correction on the left eye image signal and the right eye image signal (Left_out, Right_out). ) Is output (S710). The gamma correction unit 650 may convert the linear color values Left'_WRGB and Right'_WRGB of the four-color data into nonlinear color values Left_out and Right_out using the gamma LUT.

9 illustrates the cognitive crosstalk reduction effect of the stereoscopic image display device according to an embodiment of the present invention.

Referring to FIG. 9, a reduction effect of cognitive crosstalk may be confirmed by using the SSIM (Structural SIMilarity) index indicating the similarity between two images by quantifying the luminance and the structural similarity between the original image and the comparative image.

Before the crosstalk correction method of the present invention, the white image (a) of 7% of the crosstalk before improvement has a similarity of the SSIM 98% to the original white image, and the low level allowed by the crosstalk specification of the stereoscopic image display device. to be. It can be seen that the white image (b) of 30% of the crosstalk before improvement has a similarity to the original white image and SSIM of 89% and the image quality is deteriorated.

Since the crosstalk correction method of the present invention corrects the luminance increase caused by crosstalk for each white pixel on the basis of monocular, the white image (c) after improvement of 7% of crosstalk is similar to the original white image of SSIM 100%. It can be seen that the cognitive crosstalk of the entire image is reduced to such a degree. In addition, after 30% of crosstalk improvement, the white image (d) also reduces the cognitive crosstalk of the entire image to have a similarity between the original white image and SSIM 98%, resulting in a crosstalk of 7%, which is an acceptable level of a stereoscopic image display device. It is similar to the white image of (a).

On the other hand, whether the crosstalk correction method using the white pixel of the stereoscopic image display apparatus according to an embodiment of the present invention is applied, the reference image is displayed as either the left eye image or the right eye image on the stereoscopic image display device. When displaying a variable image having variable input data as the remaining monocular image, the luminance of chromatic color (R, G, B) pixels among the pixels displaying the reference image according to the variable image is not variable but achromatic (W). This can be confirmed by detecting whether only the luminance of the pixel is variable.

As described above, the stereoscopic image display apparatus and its driving method according to an exemplary embodiment correct the amount of luminance increase caused by crosstalk for each white pixel to reduce 3D crosstalk, thereby improving the perceived image quality of the 3D image while improving the luminance by the white pixel. In addition, the crosstalk can be reduced without color distortion by applying the crosstalk correction only to the achromatic white pixels except the chromatic color.

The present invention can be applied to all three-dimensional image display devices in which a problem of increasing crosstalk due to the addition of white pixels may occur.

The above description is merely illustrative of the present invention, and various modifications may be made by those skilled in the art without departing from the technical spirit of the present invention. Therefore, the embodiments disclosed in the specification of the present invention are not intended to limit the present invention. The scope of the present invention should be construed by the claims below, and all techniques within the scope equivalent thereto should be construed as being included in the scope of the present invention.

100: panel 200: gate driver
300: data driver 400: timing controller
500: gamma voltage generator 600: image processor
700: 3D optical filter 1000: stereoscopic image display device
2000: host system 610: degamma correction unit
620: color space conversion unit 630: crosstalk correction unit
640: color temperature correction unit 650: gamma correction unit
660: memory

Claims (9)

A panel comprising a plurality of pixels,
A 3D optical filter which separates the optical paths of the left eye image and the right eye image displayed on the plurality of pixels and provides them to both eyes of the viewer;
A panel driver for driving the panel;
Achromatic color data other than chromatic color data among the supplied first left eye image signal and the first right eye image signal are corrected by applying a crosstalk value stored in a memory, and a second left eye image signal including the corrected achromatic data and the chromatic color data And an image processor configured to output a second right eye image signal to the panel driver. The method according to claim 1,
The image processor
A color space converter for converting three color data of each of the first left eye image signal and the first right eye image signal into left eye four color data and right eye four color data;
The left eye white data and the right eye white data corresponding to the achromatic data among the left eye four-color data and the right eye four-color data are respectively corrected by applying the corresponding crosstalk values stored in the memory, and the corrected left eye white data and corrected right eye white And a crosstalk correction unit configured to output the second left eye image signal and the second right eye image signal including data, the left eye tricolor data and the right eye tricolor data corresponding to the chromatic data. The method according to claim 2,
The memory is
A first crosstalk LUT storing first crosstalk values used when correcting the left eye white data, and a second crosstalk LUT storing second crosstalk values used when correcting the right eye white data;
The first and second crosstalk LUTs
A stereoscopic display device displaying a left eye white pattern and a right eye white pattern on a gray scale and storing minimum values of crosstalk values calculated based on luminance measured at each time point along with input data of the left eye white pattern and right eye white pattern. . The method according to claim 3,
The crosstalk correction unit
The first crosstalk value selected corresponding to the first left eye white data and the first right eye white data from the first crosstalk LUT and the calculated value of the first right eye white data are subtracted from the first left eye white data. 1 Correct the left eye white data,
The second crosstalk value selected from the second crosstalk LUT corresponding to the first right eye white data and the first left eye white data and an operation value of the first left eye white data are subtracted from the first right eye white data. 1 Right stereoscopic image display for correcting white eye data. The method according to claim 2,
The image processor
A degamma correction unit configured to degamma correct the supplied left eye image signal and the first right eye image signal and output the degamma correction unit to the color space converter;
A color temperature correction unit configured to correct and output a color temperature of the second left eye image signal and the second right eye image signal supplied from the crosstalk correction unit;
And a gamma correction unit configured to gamma correct the output signal of the color temperature correction unit and output the gamma correction unit to the panel driver. The method according to any one of claims 1 to 5,
When the reference image is displayed as one monocular image among the left eye image and the right eye image displayed on the panel, and the variable image whose input data is variable is displayed as the remaining monocular image, the reference image is displayed according to the variable image. A stereoscopic image display device in which only luminance of achromatic pixels is changed without changing luminance of chromatic pixels among pixels. Converting three-color data of each of the first left eye image signal and the second right eye image signal into left eye four color data and right eye four color data;
Correcting the left eye white data and the right eye white data among the left eye four-color data and the right eye four-color data by applying corresponding crosstalk values;
A second left eye image signal including three color data among the corrected left eye white data and four left eye colors and a second right eye image signal including three color data among the corrected right eye white data and the right eye four color data; Outputting the
And displaying the second left eye image signal and the second right eye image signal on a panel. The method according to claim 7,
Before displaying the second left eye image signal and the second right eye image signal on the panel,
And performing color temperature correction on each of the second left eye image signal and the second right eye image signal. The method according to claim 7,
Correcting the left eye white data and the right eye white data may include:
Subtracting a result of multiplying the first crosstalk value selected from the first crosstalk LUT corresponding to the left eye white data and the right eye white data by the right eye white data from the left eye white data;
And subtracting a result of multiplying the second crosstalk value selected from the second crosstalk LUT corresponding to the right eye white data and the left eye white data by the left eye white data from the first right eye white data. Driving method.

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