KR101829463B1 - Stereoscopic image display and data compensation method thereof - Google Patents

Abstract

The stereoscopic image display apparatus according to the present invention displays the left eye image and the right eye image alternately in units of two horizontal pixel lines and displays the left eye image and the right eye image in the horizontal pixel line in which the left eye image is displayed and the horizontal pixel line in which the right eye image is displayed, A display panel in which TFTs for driving a horizontal pixel line in which the left eye image is displayed and TFTs for driving a horizontal pixel line in which the right eye image is displayed are arranged in two rows adjacent to each other along a horizontal direction; A 3D data formatter for generating 3D input data by separating left eye image data for realizing the left eye image and right eye image data for realizing the right eye image in units of two horizontal pixel lines from externally input source data; And an input frame is time-divided into a first sub-frame and a second sub-frame, and the 3D input data is shifted by a predetermined unit for each of the left eye image data and the right eye image data to generate 3D shift data, And a data modulation circuit for mapping the 3D input data and mapping the 3D shift data to the second sub-frame.

Description

TECHNICAL FIELD [0001] The present invention relates to a stereoscopic image display apparatus and a method of compensating a stereoscopic image,

The present invention relates to a stereoscopic image display apparatus and a data compensation method thereof.

The stereoscopic image display device implements a stereoscopic or 3D image using a stereoscopic technique or an autostereoscopic technique. The binocular parallax method uses parallax images of right and left eyes with large stereoscopic effect, and both glasses and non-glasses are used, and both methods are practically used. The spectacle method realizes a stereoscopic image by using polarizing glasses or liquid crystal shutter glasses to display the right and left parallax images in a direct view type display device or a projector by changing the polarization directions of the parallax images in a time division manner. In the non-eyeglass system, an optical plate such as a parallax barrier for separating the optical axis of left and right parallax images is installed in front of the display screen.

The stereoscopic image display apparatus of the glasses type is typically a polarized glasses system. In the polarizing glasses system, a polarized light separating element such as a pattern retarder is attached to the display panel. The pattern retarder separates the polarized light of the left eye image and the right eye image displayed on the display panel. When a viewer views a stereoscopic image in a polarizing glasses type stereoscopic image display apparatus, polarized glasses are worn to observe the polarization of the left eye image through the left eye filter of the polarized glasses, and the polarization of the right eye image is viewed through the right eye filter of the polarized glasses So you can feel the three-dimensional feeling.

The stereoscopic image display apparatus of the polarizing glasses system can be applied to a display panel having a normal structure as shown in Fig. In the display panel of the normal structure, RGB pixels are arranged along the horizontal direction (extending direction of the gate line) to form horizontal pixel lines. The horizontal pixel lines alternately display the left eye image and the right eye image. In each horizontal pixel line, TFTs (Thin Film Transistors) are arranged in a row along the horizontal direction at the bottom of the RGB pixels, and are connected to the gate line GL and the data line DL. The TFT, the gate line GL and the data line DL formed on the lower glass substrate of the display panel are overlapped with the black matrix BM formed on the upper glass substrate of the display panel. In the stereoscopic image display apparatus having such a display panel of the normal structure, the upper and lower viewing angles thereof are determined by the width of the black matrix (BM) formed between the horizontal pixel lines. The upper and lower viewing angles of the stereoscopic image display device become larger as the width of the black matrix BM formed between the horizontal pixel lines becomes wider. In order to reduce 3D crosstalk, it is necessary to increase the width of the black matrix BM to increase the upper and lower viewing angles. However, in a stereoscopic image display device having a display panel having a normal structure, there is a disadvantage in that the opening area of each pixel line is reduced by increasing the width of the black matrix (BM).

In order to increase the width of the black matrix (BM) arranged between the horizontal pixel line in which the left eye image is displayed and the horizontal pixel line in which the right eye image is displayed without reducing the aperture area of each pixel line, Panel has been proposed.

Referring to FIG. 2, in the display panel of the view angle improving structure, the RGB pixels are arranged along the horizontal direction to form horizontal pixel lines, and the horizontal pixel lines alternately display the left eye image and the right eye image in two lines. In order to improve the upper and lower viewing angles without reducing the aperture area, the TFTs are not arranged between two horizontal pixel lines which display the left eye image (or the right eye image) equally. Instead, the pixel lines and the right eye image Are arranged in two rows along the horizontal direction between the pixel lines to be displayed. To this end, the TFTs are arranged in a row on the upper side of the RGB pixels constituting the upper horizontal pixel line in two horizontal pixel lines which display the left eye image (or the right eye image) equally, And is connected to the gate line GL and the data line DL by being arranged in one row at the bottom of the RGB pixels constituting the lower horizontal pixel line. The display panel of this viewing angle improving structure can not reduce the aperture area compared with the normal structure because it does not arrange the TFTs between two horizontal pixel lines which equally display the left eye image (or the right eye image), and instead Since the TFTs are arranged in two rows along the horizontal direction between the horizontal pixel line in which the left eye image is displayed and the horizontal pixel line in which the right eye image is displayed, the width of the black matrix BM necessary for the improvement of the viewing angle is approximately doubled .

However, in a stereoscopic image display apparatus having a display panel with a viewing angle improving structure, two horizontal pixel lines that display the left eye image (or the right eye image) are adjacent to each other, and distortion of the display image There is a prominent problem.

FIG. 3 shows a monocular image (for example, a left eye image) indicated by an oblique line on the display panel of the normal structure. According to this, the left eye image data L1, L2, Are displayed satisfactorily. This is because the left eye images are displayed at intervals of one horizontal pixel line with one horizontal pixel line in which the right eye image is displayed. In Fig. 3, hatched portions represent right eye image data (R1, R2, ...) blocked by the left eye filter of the polarizing glasses.

On the other hand, FIG. 4 shows a left eye image (for example, a left eye image) displayed in oblique lines on the display panel of the viewing angle improving structure. Can not be displayed as a diagonal line which is originally intended to be expressed, and it can be seen that each line is disconnected. This is because the left eye images are displayed at intervals of two horizontal pixel lines with two horizontal pixel lines in which the right eye image is displayed, thereby increasing the nonlinearity of the pixel structure. In Fig. 4, hatched portions represent right eye image data (R1, R2, ...) blocked by the left eye filter of the polarizing glasses.

Accordingly, it is an object of the present invention to provide a stereoscopic image display device and a data compensation method thereof that can overcome structural nonlinearity of a display panel for improving a viewing angle through data compensation, thereby alleviating distortion of a display image .

In order to achieve the above object, the stereoscopic image display apparatus according to an embodiment of the present invention displays a left eye image and a right eye image alternately in units of two horizontal pixel lines, and the horizontal pixel line in which the left eye image is displayed, TFTs for driving a horizontal pixel line in which the left eye image is displayed and TFTs for driving a horizontal pixel line in which the right eye image is displayed are arranged in two rows adjacent to each other along the horizontal direction between horizontal pixel lines in which an image is displayed Disposed display panel; A 3D data formatter for generating 3D input data by separating left eye image data for realizing the left eye image and right eye image data for realizing the right eye image in units of two horizontal pixel lines from externally input source data; And an input frame is time-divided into a first sub-frame and a second sub-frame, and the 3D input data is shifted by a predetermined unit for each of the left eye image data and the right eye image data to generate 3D shift data, And a data modulation circuit for mapping the 3D input data and mapping the 3D shift data to the second sub-frame.

According to an embodiment of the present invention, a left eye image and a right eye image are alternately displayed in units of two horizontal pixel lines, and between each horizontal pixel line in which the left eye image is displayed and a horizontal pixel line in which the right eye image is displayed, There is provided a stereoscopic image display device having TFTs for driving horizontal pixel lines in which images are displayed and TFTs for driving horizontal pixel lines in which the right-eye images are displayed, the display panels being arranged in two rows adjacent to each other along the horizontal direction The compensation method includes: generating 3D input data by separating left eye image data for realizing the left eye image and right eye image data for realizing the right eye image in units of two horizontal pixel lines from externally input source data; Dividing the input frame into a first sub-frame and a second sub-frame, and shifting the 3D input data by a predetermined unit for each of the left eye image data and the right eye image data to generate 3D shift data; And mapping the 3D input data to the first sub-frame and mapping the 3D shift data to the second sub-frame.

In the stereoscopic image display apparatus and the data compensation method according to the present invention, the input frame is time-divided into the first sub-frame and the second sub-frame, and the 3D input data is mapped as it is in the first sub- The 3D input data is shifted by a predetermined unit for each of the left eye image data and the right eye image data, and then the left eye image data and the right eye image data are mapped to each other. As described above, the present invention overcomes the structural non-linearity of the display panel for improving the viewing angle through data compensation, thereby remarkably alleviating the distortion of the display image.

1 is a view showing a part of a display panel of a normal structure;
2 is a view showing a part of a display panel of a viewing angle improving structure;
3 is a view showing a left eye image displayed in an oblique line on a display panel of a normal structure;
4 is a view showing a left eye image displayed in an oblique line on a display panel of a viewing angle improving structure;
5 is a view schematically showing a stereoscopic image display apparatus according to an embodiment of the present invention.
6 is a view showing driving circuits of the display panel shown in Fig.
7 is a view showing a part of a pixel array formed on a display panel and a pattern retarder adhered to the display panel.
8 is a diagram showing a modulation operation of a data modulation circuit for generating 3D compensation data;
9 is a diagram showing an operation effect by a modulation operation;
10A is a diagram showing an example of a left eye image displayed in an oblique line by 3D input data;
FIG. 10B is a view showing an example of a left eye image displayed in an oblique direction by the compensation data according to the present invention; FIG.
11A is a diagram showing an example of a left eye image displayed in a circular shape by 3D input data;
11B is a view showing an example of a left eye image displayed in a circular form by the compensation data according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 5 to 11B.

5 schematically shows a stereoscopic image display apparatus according to an embodiment of the present invention. Fig. 6 shows the driving circuits of the display panel shown in Fig.

A stereoscopic image display device according to an embodiment of the present invention includes a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP), and an organic light emitting diode A flat panel display device such as an organic light emitting diode (OLED), an electrophoresis (EPD), or the like. Hereinafter, a stereoscopic image display device will be described with reference to a liquid crystal display device, but it should be noted that the technical idea of the present invention is not limited thereto.

2 and 3, the stereoscopic image display apparatus according to the embodiment of the present invention includes a display panel 100, a pattern retarder 300, and polarizing glasses 400.

The display panel 100 alternately displays the left eye image and the right eye image for stereoscopic image implementation in units of two horizontal pixel lines. The display panel 100 includes a liquid crystal layer formed between two glass substrates. The display panel 100 includes pixels arranged in a matrix form by an intersection structure of the data lines DL and the gate lines GL. Each of the pixels includes a liquid crystal cell, and a pixel array is formed by these pixels.

Data lines DL, gate lines GL, TFTs, pixel electrodes, and storage capacitors are formed on a lower glass substrate of the display panel 100. The liquid crystal cells are driven by the electric field between the pixel electrodes connected to the TFT and the common electrode. On the upper glass substrate of the display panel 100, a black matrix, a color filter, a common electrode, and the like are formed. The black matrix divides between the pixels to prevent image interference between the pixels. The common electrode is formed on the upper glass substrate in a vertical electric field driving method such as a TN (Twisted Nematic) mode and a VA (Vertical Alignment) mode, and a horizontal electric field such as IPS (In Plane Switching) mode and FFS (Fringe Field Switching) Is formed on the lower glass substrate together with the pixel electrode in the driving method. A lower polarizer plate is bonded to the lower glass substrate of the display panel 100, and an upper polarizer plate is bonded to the upper glass substrate of the display panel 100. A column spacer for maintaining a cell gap of the liquid crystal cell may be formed between the lower glass substrate and the upper glass substrate.

The stereoscopic image display device according to the embodiment of the present invention can be implemented in any form such as a transmissive type, a transflective type, and a reflective type. In a transmissive display device and a semi-transmissive display device, a backlight unit 200 is required. The backlight unit 200 may be implemented as a direct type backlight unit or an edge type backlight unit.

The pattern retarder 300 is attached to the upper polarizer plate of the display panel 100 and includes a first pattern 300a and a second pattern 300b alternately formed on a line basis. The first pattern 300a of the pattern retarder 300 is opposed to the horizontal pixel lines representing the left eye image in the pixel array and the second pattern 300b is opposed to the horizontal pixel lines representing the right eye image in the pixel array Respectively. The optical axes of the first pattern 300a and the second pattern 300b are different from each other. The first pattern 300a delays the linearly polarized light phase of the left eye image incident through the upper polarizer by a quarter wavelength and passes the first linearly polarized light through the first polarized light (for example, left circularly polarized light). The second pattern 300b delays the linearly polarized light phase of the right eye image incident through the upper polarizer by 3/4 wavelength and transmits the second polarized light (for example, right circularly polarized light).

The polarizing glasses 400 are provided with a left eye and a right eye including a polarizing filter. The left eye polarizing filter of the polarizing glasses 400 passes only the left circularly polarized light and the right eye polarizing filter passes only the right circularly polarized light. When the viewer wears the polarizing glasses 400, only the left eye image is displayed in the left eye of the viewer, and only the right eye image is displayed in the right eye of the viewer. As a result, the viewer can feel the stereoscopic effect through the binocular parallax.

The stereoscopic image display apparatus according to the embodiment of the present invention includes a display panel driving circuit for driving the display panel 100 and a control circuit for controlling the display panel driving circuit. The display panel drive circuit includes a data drive circuit 102 and a gate drive circuit 103. The control circuit includes a timing controller 101, a host system 104, a data modulation circuit 105, and the like.

Each of the source drive ICs of the data driving circuit 102 includes a shift register, a latch, a digital to analog converter (DAC), an output buffer, and the like. The data driving circuit 102 latches the 3D compensation data mDATA of the left eye and right eye images under the control of the timing controller 101. [ The data driving circuit 102 inverts the polarity of the data voltage by converting the 3D compensation data mDATA into an analog positive gamma compensation voltage and a negative gamma compensation voltage in response to the polarity control signal POL. The data driving circuit 102 supplies a positive / negative polarity data voltage to the data lines DL in response to the source output enable signal SOE.

The gate driving circuit 103 includes a shift register, a level shifter, and the like. The gate driving circuit 103 sequentially supplies gate pulses (or scan pulses) to the gate lines GL in synchronization with a data voltage supplied to the data lines DL under the control of the timing controller 101. [ The horizontal pixel lines of the display panel 100 are sequentially scanned from top to bottom by a gate pulse.

The timing controller 101 receives timing signals such as a vertical synchronization signal Vsync, a horizontal synchronization signal Hsync, a data enable signal DE and a dot clock DCLK from the host system 104, And generates timing control signals for controlling the operation timing of the driving circuit 102 and the gate driving circuit 103. [ The timing control signals include a gate timing control signal for controlling the operation timing of the gate drive circuit 103 and a data timing control signal for controlling the operation timing of the data drive circuit 102 and the polarity of the data voltage.

The gate timing control signal includes a gate start pulse (GSP), a gate shift clock (GSC), a gate output enable signal (GOE), and the like. The gate start pulse GSP controls the start operation timing of the gate drive circuit 103. [ The gate shift clock GSC is a clock signal for shifting the gate start pulse GSP. The gate output enable signal GOE controls the output timing of the gate drive circuit 103.

The data timing control signal includes a source start pulse (SSP), a source sampling clock (SSC), a polarity control signal (POL), and a source output enable signal (SOE) . The source start pulse SSP controls the data sampling start timing of the data driving circuit 102. The source sampling clock SSC is a clock signal for shifting the source start pulse SSP, and controls sampling timing of data. The polarity control signal POL controls the polarity of the data voltage output from the data driving circuit 102. [ The source output enable signal SOE controls the data voltage output timing of the data driving circuit 102.

The timing controller 101 aligns the 3D compensation data mDATA of the left eye and right eye images input from the data modulation circuit 105, and supplies the 3D compensation data mDATA to the data driving circuit 102.

The timing controller 101 can control the operation timing of the display panel driving circuit at a frame frequency (100 Hz, 120 Hz, 200 Hz, 240 Hz, etc.) of the input frame frequency x i (i is a positive integer of 2 or more) Hz. The input frame frequency is 60 Hz in the National Television Standards Committee (NTSC) system and 50 Hz in the PAL (Phase-Alternating Line) system.

The host system 104 generates timing signals (Vsync, Hsync, DE, DCLK) to be applied to the timing controller 101. The host system 104 includes a 3D data formatter 104a. The 3D data formatter 104a receives the source data from an external video source and separates the left eye image data and the right eye image data included in the source data into units of two horizontal pixel lines to generate 3D input data iDATA. The host system 104 supplies timing signals (Vsync, Hsync, DE, DCLK) and 3D input data (iDATA) to the data modulation circuit 105.

The data modulation circuit 105 supplies timing signals (Vsync, Hsync, DE, DCLK) input from the host system 104 to the timing controller 101.

The data modulation circuit 105 generates the 3D compensation data mDATA by differently distributing the 3D input data iDATA input from the host system 104 in terms of time. In order to generate the 3D compensation data (mDATA), the data modulation circuit 105 time-divides the input frame into the first sub-frame and the second sub-frame, and maps the 3D input data (iDATA) And the 3D input data (iDATA) is shifted by a predetermined unit for each of the left eye image data and the right eye image data in the second sub frame, and is mapped. The data modulation circuit 105 supplies the 3D compensation data mDATA to the timing controller 101. [

The data modulation circuit 105 may be mounted on the host system 104 together with the 3D data formatter 104a and may be mounted on the timing controller 101 separately from the 3D data formatter 104a.

7 shows a part of the pixel array formed on the display panel 100 and the pattern retarder 300 adhered to the display panel 100. Fig.

The display panel 100 of the present invention is implemented as a display panel of a viewing angle improving structure.

The display panel 100 alternately displays the left eye image and the right eye image in units of two horizontal pixel lines. In this display panel 100, RGB pixels are arranged along the horizontal direction (the extending direction of the gate line GL) to form horizontal pixel lines, and the horizontal pixel lines alternately display the left eye image and the right eye image in two lines do. In order to improve the upper and lower viewing angles without reducing the aperture area, the TFTs are not arranged between two horizontal pixel lines which display the left eye image (or the right eye image) equally. Instead, the horizontal pixel line and the right eye image Are arranged in two rows along the horizontal direction between the displayed horizontal pixel lines. To this end, the TFTs are arranged in a row on the upper side of the RGB pixels constituting the upper horizontal pixel line in two horizontal pixel lines which display the left eye image (or the right eye image) equally, And is connected to the gate line GL and the data line DL by being arranged in one row at the bottom of the RGB pixels constituting the lower horizontal pixel line. Since the display panel 100 of this viewing angle improving structure does not arrange the TFTs between two horizontal pixel lines that display the same left eye image (or right eye image), the same open area Instead of arranging the TFTs in two rows along the horizontal direction between the horizontal pixel line in which the left eye image is displayed and the horizontal pixel line in which the right eye image is displayed, the width of the black matrix BM necessary for improving the viewing angle is It can be increased approximately twice as much as the normal structure.

Each of the pair of horizontal pixel lines displaying the left eye image makes a left eye image enter the first pattern 300a in opposition to the first pattern 300a of the pattern retarder 300. Each of the pairs of horizontal pixel lines arranged between pairs of horizontal pixel lines for displaying a left eye image to oppose the second pattern 300b of the pattern retarder 300 to form a right eye image in the second pattern 300b ).

8 shows the modulation operation of the data modulation circuit 105 for generating the 3D compensation data mDATA. Figure 9 shows the effect of the modulation operation.

The data modulation circuit 105 time-divides the input frame into the first sub-frame SF1 and the second sub-frame SF2 and then shifts the 3D input data iDATA by a predetermined unit for each of the left eye image data and the right eye image data And generates 3D shift data (sDATA). The data modulation circuit 105 maps the 3D input data iDATA to the first subframe SF1 and maps the 3D shift data sDATA to the second subframe SF2 to generate the 3D compensation data mDATA, .

The left eye image data and the right eye image data constituting the 3D input data (iDATA) correspond to the left eye display lines and the right eye display lines which are alternately repeated in units of two horizontal pixel lines, respectively. For example, in the first subframe SF1, the first, second, third, and fourth left eye image data L1, L2, L3, and L4 correspond to the first, Second, third and fourth right eye image data R 1, R 2, R 3, and R 4 respectively corresponding to the first horizontal pixel lines L 1, L # 2, L # R4 correspond to the third, fourth, seventh, and eighth horizontal pixel lines L # 3, L # 4, L # 7, and L # 8 corresponding to the right eye display lines, respectively.

The left eye image data constituting the 3D shift data sDATA is a left eye image data of the 3D input data iDATA shifted from the left eye display lines by one horizontal pixel line from top to bottom (or along the scanning direction of the display panel) . However, the 3D shift data sDATA corresponding to the uppermost line (or the line to be scanned first) among the left eye display lines is selected to have the same value as the 3D input data iDATA to be input to the uppermost line. For example, as shown by the dotted arrow in Fig. 8, in the second sub-frame SF2, corresponding to the second, fifth and sixth horizontal pixel lines L # 2, L # 5 and L # 6 The first left eye image data L1, the second left eye image L3 and the third left eye image L3 are selected as the left eye image data constituting the 3D shift data sDATA, The image data L1 is selected as the left eye image data constituting the 3D shift data sDATA.

The right-eye image data constituting the 3D shift data sDATA includes the right-eye image data of the 3D input data (iDATA) shifted by one horizontal pixel line from top to bottom in the right eye display lines (or along the scanning direction of the display panel) . However, the 3D shift data sDATA corresponding to the top line (or the line to be scanned first) among the right eye display lines is selected to have the same value as the 3D input data iDATA to be inputted to the top line. For example, as shown by the solid line arrows in FIG. 8, in the second sub-frame SF2, the fourth, seventh, and eighth horizontal pixel lines L # 4, L # The first right eye image data R1, R2 and R3 are selected as the right eye image data constituting the 3D shift data sDATA and the first right eye image data R1, The image data R1 is selected as the right eye image data constituting the 3D shift data sDATA.

The data modulation circuit 105 integrates the 3D input data (iDATA) and the 3D shift data (sDATA) temporally within one frame. By this integration effect, the average value of the left eye image data displayed adjacent to each other on the second, fifth, and sixth horizontal pixel lines L # 2, L # 5, and L # 6 corresponding to the left eye display lines (L1 + L2) / 2, (L2 + L3) / 2, and (L3 + L4) / 2, respectively. In the fourth, seventh, and eighth horizontal pixel lines L # 4, L # 7 and L # 8 corresponding to the right eye display lines, the average value of the right eye image data (R1 + R2 ) / 2, (R 2 + R 3) / 2, and (R 3 + R 4) / 2, respectively.

According to the present invention, when the oblique lines are displayed along the vertical direction, the oblique lines are not disconnected every two lines as shown in the left side of Fig. 9, and good oblique lines are obtained as shown in the right side of Fig. As a result, the nonlinearity of the pixel structure, which is problematic in the display panel of the viewing angle improving structure, is greatly alleviated by the temporal integration effect of the present invention, and thereby the image distortion of the monocular (left eye or right eye) reference is drastically reduced.

10A shows an example of a monocular image (for example, a left eye image) displayed in an oblique direction by 3D input data (iDATA). FIG. 10B shows an example of a monocular image (for example, a left eye image) displayed in an oblique direction by the compensation data mDATA according to the present invention. 10A and 10B, hatched portions represent right eye image data (R1, R2, ... R6) blocked by the left eye filter of polarized glasses.

Referring to FIG. 10A, when the left eye image is displayed in an oblique direction with only 3D input data (iDATA), the left eye images are displayed at intervals of two horizontal pixel lines, L2, ..., L6 can not be displayed in a desired slant line and are cut off for every two horizontal pixel lines.

In contrast, according to the present invention, when the left eye image is displayed in an oblique direction as shown in FIG. 10B, the temporal integration effect of the 3D input data iDATA and the 3D shift data sDATA constituting the compensation data mDATA The display position is expanded along the desired oblique line, and as a result, the linearity is ensured and good oblique lines are obtained. The portion where the display position expands due to the temporal integration effect is indicated by a dot pattern in Fig. 10B. The dot pattern is displayed on the left eye display lines L # 2, L # 5, L # 6, L # 9, and L # 10 except for the top left eye display line L #

11A shows an example of a monocular image (e.g., a left eye image) displayed in a circular form by 3D input data (iDATA). 11B shows an example of a monocular image (for example, a left eye image) displayed in a circular form by the compensation data mDATA according to the present invention. 11A and 11B, hatched portions indicate right eye image data (R1, R2, ... R6) blocked by the left eye filter of polarizing glasses.

11A, when a left eye image is displayed in a circular shape using only 3D input data (iDATA), since left eye images are displayed at intervals of two horizontal pixel lines, the nonlinearity of the pixel structure becomes larger, L2, ..., L7 can not be displayed as a desired circle but are displayed for each of the two horizontal pixel lines as a triangle.

In contrast, according to the present invention, when the left eye image is displayed in the circular shape as shown in FIG. 11B, the 3D input data iDATA (represented by a triangle) and the 3D shift data sDATA ) (Indicated by an inverted triangle), the display position is extended along the desired circle, and as a result, the linearity is secured and a good circle is obtained. The portion where the display position expands due to the temporal integration effect is indicated by a dot pattern in Fig. 11B. The dot pattern is displayed on the left eye display lines L # 2, L # 5, L # 6, L # 9, L # 10, and L # 13 other than the top left eye display line L #

As described above, in the stereoscopic image display apparatus and the data compensation method according to the present invention, the input frame is time-divided into the first sub-frame and the second sub-frame, and the 3D input data is mapped as it is in the first sub-frame , And the 3D input data is shifted by a predetermined unit for each of the left eye image data and the right eye image data in the second sub-frame, and then the left and right eye image data are mapped, thereby securing the linearity by expanding the display position through the temporal integration effect. As described above, the present invention overcomes the structural non-linearity of the display panel for improving the viewing angle through data compensation, thereby remarkably alleviating the distortion of the display image.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Therefore, the present invention should not be limited to the details described in the detailed description, but should be defined by the claims.

100: display panel 101: timing controller
102: Data driving circuit 103: Gate driving circuit
104: Host system 105: Data modulation circuit
200: backlight unit 300: pattern retarder
400: polarizing glasses

Claims (10)

The left eye image and the right eye image are alternately displayed in units of two horizontal pixel lines and a horizontal pixel line in which the left eye image is displayed is displayed alternately between a horizontal pixel line in which the left eye image is displayed and a horizontal pixel line in which the right eye image is displayed, And a TFT for driving the horizontal pixel line in which the right-eye image is displayed are arranged in two rows adjacent to each other along the horizontal direction;
A 3D data formatter for generating 3D input data by separating left eye image data for realizing the left eye image and right eye image data for realizing the right eye image in units of two horizontal pixel lines from externally input source data; And
The input frame is time-divided into a first sub-frame and a second sub-frame,
Eye image data and the right-eye image data are shifted by a predetermined unit for each of the left-eye image data and the right-eye image data in units of two horizontal pixel lines to generate 3D shift data,
Frame, mapping the 3D input data to the first sub-
And a data modulation circuit for mapping the 3D shift data to the second sub-frame.
The method according to claim 1,
The left eye image data constituting the 3D shift data is selected as the left eye image data of the 3D input data shifted by one horizontal pixel line along the scan direction of the display panel corresponding to the horizontal pixel lines in which the left eye image is displayed And the three-dimensional image display device. 3. The method of claim 2,
Wherein the 3D shift data corresponding to the top line scanned first among the horizontal pixel lines in which the left eye image is displayed is selected to have the same value as the 3D input data to be input to the top line. The method according to claim 1,
The right eye image data constituting the 3D shift data is selected as right eye image data of the 3D input data shifted by one horizontal pixel line along the scan direction of the display panel corresponding to the horizontal pixel lines in which the right eye image is displayed And the three-dimensional image display device. 5. The method of claim 4,
Wherein the 3D shift data corresponding to the top line scanned first among the horizontal pixel lines in which the right-eye image is displayed is selected to have the same value as the 3D input data to be input to the top line. The left eye image and the right eye image are alternately displayed in units of two horizontal pixel lines and a horizontal pixel line in which the left eye image is displayed is displayed alternately between a horizontal pixel line in which the left eye image is displayed and a horizontal pixel line in which the right eye image is displayed, And a display panel in which TFTs for driving a horizontal pixel line in which the right-eye image is displayed are arranged in two rows adjacent to each other along a horizontal direction, the data compensation method comprising:
Generating 3D input data by separating left eye image data for realizing the left eye image and right eye image data for realizing the right eye image in units of two horizontal pixel lines from externally input source data;
Eye image data and the right eye image data are divided into a first sub-frame and a second sub-frame, and the 3D input data, in which the left eye image data and the right eye image data are separated in units of two horizontal pixel lines, Generating 3D shift data by shifting by unit; And
And mapping the 3D input data to the first sub-frame and mapping the 3D shift data to the second sub-frame.
The method according to claim 6,
In the step of mapping the data,
The left eye image data constituting the 3D shift data is selected as the left eye image data of the 3D input data shifted by one horizontal pixel line along the scan direction of the display panel corresponding to the horizontal pixel lines in which the left eye image is displayed And the data is compensated. 8. The method of claim 7,
In the step of mapping the data,
Wherein the 3D shift data corresponding to the top line scanned first among the horizontal pixel lines in which the left eye image is displayed is selected to have the same value as the 3D input data to be input to the top line. Compensation method. The method according to claim 6,
In the step of mapping the data,
The right eye image data constituting the 3D shift data is selected as right eye image data of the 3D input data shifted by one horizontal pixel line along the scan direction of the display panel corresponding to the horizontal pixel lines in which the right eye image is displayed And the data is compensated. 10. The method of claim 9,
In the step of mapping the data,
The 3D shift data corresponding to the top line scanned first among the horizontal pixel lines in which the right-eye image is displayed is selected to have the same value as the 3D input data to be input to the top line. Compensation method.

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