Display device and its data processing method

Abstract

This improves the problem of reduced sharpness that occurs when displaying 2D images on a display panel with a pixel structure for 3D implementation. [Solution] The display device includes a display panel having a pixel shift structure for three-dimensional (3D) mounting, a parallax film located on the display panel and including a plurality of lenses, and a bypass circuit that outputs the clear type edge image data in two-dimensional (2D) mode when the edge image data representing the edge area of ​​the 2D input image is of the clear type, without applying the color map conversion corresponding to the pixel shift structure of the display panel.

Description

Technical Field

[0001] This disclosure relates to a display device and a data processing method thereof.

Background Art

[0002] An LFD (Light field 3D display) that displays 3D images without glasses is known. The LFD gives a user a stereoscopic feeling by forming a parallax between a left-eye image and a right-eye image using a parallax film attached to a display panel.

[0003] By the way, since this display device includes a pixel structure optimized for 3D implementation, the sharpness of a 2D image may decrease when displaying a 2D image.

Summary of the Invention

Problems to be Solved by the Invention

[0004] Therefore, this disclosure provides a display device and a data processing method thereof that can improve the problem of sharpness degradation that occurs when displaying a 2D image on a display panel having a pixel structure for 3D implementation.

Means for Solving the Problems

[0005] The display device according to this embodiment includes: a display panel having a pixel shift structure for 3D implementation; a parallax film located on the display panel and including a plurality of lenses; and a bypass circuit that outputs the clear-type edge image data in a state where color map conversion corresponding to the pixel shift structure of the display panel is not applied when edge image data for embodying an edge area of a 2D input image is of a clear type in a 2D mode.

[0006] This disclosure skips the color map conversion operation only for clear-type edge image data included in 2D input images, while performing the color map conversion operation for other non-clear-type edge image data and non-edge image data in accordance with the pixel shift structure of the display panel. As a result, this disclosure can improve the sharpness reduction problem that occurs when displaying 2D images on a display panel having a pixel structure for 3D implementation, which is a problem that occurs with clear-type data.

[0007] This disclosure describes a method for improving line jagging that occurs in pixel-shift structures by subpixel rendering to minimize the range of variation in positional luminance peaks for non-clear type edge image data, i.e., by increasing or decreasing the luminance of the target pixel and surrounding subpixels.

[0008] The effects of this disclosure are not limited to those exemplified above, and a variety of other effects are included in this disclosure. [Brief explanation of the drawing]

[0009] [Figure 1] This is a schematic cross-sectional view showing the display device relating to this embodiment. [Figure 2] This figure shows one manifestation of a parallax film that is attached to a display panel. [Figure 3] This figure shows the alignment relationship between a display panel with a pixel shift structure and a parallax film. [Figure 4] This is a functional block diagram showing the display device in this embodiment. [Figure 5] This figure shows the configuration of the data processing circuit for the display device in this embodiment. [Figure 6] This diagram shows the operation of the data processing circuit in Figure 5. [Figure 7] This figure shows an example of the result obtained by applying a clear-type subpixel rendering technique. [Figure 8]This figure shows the subpixel rendering operation for anti-aliasing processing using this embodiment. [Figure 9] This figure shows the subpixel rendering operation for anti-aliasing processing using this embodiment. [Figure 10] This figure shows that a color map conversion has been applied to non-clear type edge image data. [Figure 11] This figure shows that no color map conversion has been applied to the clear type edge image data. Forms for embodying an invention

[0010] The advantages and features of this disclosure, and the methods for achieving them, will become apparent by referring to the embodiments described below in detail with the accompanying drawings. However, this disclosure is not limited to the embodiments disclosed below and may be embodied in various forms, and these embodiments are provided merely to complete the disclosure and to fully inform those ordinary skill in the art to which this disclosure pertains of the scope of the invention, and this disclosure is defined solely by the claims.

[0011] The shapes, sizes, proportions, angles, numbers, etc. disclosed in the drawings used to illustrate the embodiment of this disclosure are illustrative and not limited to what is shown in this disclosure. The same reference number throughout the disclosure refers to the same component. Wherever “includes,” “has,” “achieved,” etc., are used herein, other parts may be added unless “only” is used. When a component is expressed singularly, it includes cases where it includes multiple components unless otherwise explicitly stated.

[0012] When interpreting the constituent elements, they shall be interpreted as including a margin of error, even if not explicitly stated otherwise.

[0013] When describing a spatial relationship, for example, when the positional relationship between two parts is described using phrases like "above," "above," "below," or "next to," one or more other parts may be located between the two parts unless "to the right" or "directly" is used.

[0014] The terms "First," "Second," etc., may be used to describe various components, but these components are not limited by these terms. These terms are used only to distinguish one component from others. Therefore, the first component referred to below may be the second component within the technical concept of this disclosure.

[0015] The embodiment of this disclosure will be described in detail below with reference to the attached drawings. In the following description, if a specific description of a known function or configuration related to this disclosure is deemed to potentially obscure the gist of this disclosure, such detailed description will be omitted.

[0016] Figure 1 shows a display device relating to this embodiment. Figure 2 shows one embodiment of a parallax film that is attached to a display panel.

[0017] Referring to Figure 1, the display device according to this embodiment may include a display panel PNL that displays 2D images in 2D mode and 3D images in 3D mode, and a parallax film 30 located on the display panel PNL and containing multiple lenses.

[0018] The display panel PNL may be implemented as a liquid crystal panel including a pixel array 10, first and second polarizing plates 11 and 12, and a light source unit 20. The pixel array 10 includes a lower plate and an upper plate facing each other, a liquid crystal layer filled therebetween, a thin film transistor (TFT) array provided on the lower plate, and a color filter array provided on the upper plate. The pixel array 10 may include a plurality of liquid crystal cells that are light receiving elements. The light source unit 20 supplies light to the pixel array 10. The light source used in the light source unit 20 may be a fluorescent lamp array, a light emitting diode (LED) array, a laser light source array, or the like. In order to induce uniform surface light emission, the light source unit 20 may include a light guide plate and a plurality of optical sheets. On the other hand, when the display panel PNL includes a self-emitting element, the light source unit 20 may be omitted. The display panel PNL may be implemented as an electrophoretic panel, a quantum dot panel, an organic light emitting panel, or the like.

[0019] The first polarizing plate 11 and the second polarizing plate 12 may have transmission axes intersecting each other. The first polarizing plate 11 and the second polarizing plate 12 may be omitted from one side or both sides depending on the type of the display panel PNL.

[0020] The parallax film 30 separates images into a plurality of viewpoints (views, hereinafter referred to as "views") in 3D mode. The parallax film 右0 may be implemented as a lenticular lens array in which lenses having a constant curvature and a constant pitch are regularly arranged. As shown in FIG. 2, the lenticular lens array may be a switchable lens array SLA that is turned on / off by a control voltage and whose refractive index change is adjusted. By turning on / off the switchable lens array SLA, either 3D mode or 2D mode may be selectively implemented.

[0021] The switchable lens array SLA may include a first substrate SUB1 and a second substrate SUB2 facing each other, a liquid crystal layer LC between the first substrate SUB1 and the second substrate SUB2, a second electrode E2 on the second substrate SUB2, and a plurality of first electrodes E1 provided on the first substrate SUB1 corresponding to lens regions corresponding to one pitch.

[0022] The switchable lens array SLA can output a 2D video or a 3D video according to whether a voltage is applied or not. The switchable lens array SLA can output a 3D video corresponding to voltage application in 3D mode and a 2D video corresponding to no voltage application in 2D mode.

[0023] In 3D mode, the largest voltage is applied to the first electrode E1 located at the center of the lens region, and the voltage gradually decreases as it moves away from the center of the lens region. The lowest voltage among the voltages applied to the first electrode E1 is applied to the second electrode E2. At this time, the refractive index is the smallest at the center of the lens region, and gradually increases as it moves away from the center, and an optical refractive index difference corresponding to multiple viewpoints can be obtained. As a result, the left-eye image L of the display panel PNL can enter only the left eye LE of the viewer (or user) through the switchable lens array SLA, and the right-eye image R can enter only the right eye RE of the viewer through the switchable lens array SLA.

[0024] In 2D mode, corresponding to no voltage application, the refractive index difference between the first electrode E1 and the second electrode E2 disappears, and the switchable lens array SLA can function like a transparent film. As a result, the 2D image of the display panel PNL can enter both eyes of the user through the switchable lens array SLA.

[0025] FIG. 3 is a diagram showing the alignment relationship between a display panel having a pixel shift structure and a parallax film.

[0026] Referring to Figure 3, the display panel PNL has a pixel shift structure for 3D implementation. In other words, the display panel PNL includes a first pixel row consisting of a first pixel and a second pixel row consisting of a second pixel adjacent to the first pixel. Based on the position of the first pixel, the position of the second pixel can be shifted by a predetermined interval DD in the pixel row direction. The shift interval DD may be 1 / 4 of the subpixel width PW. As a result, RGB pixels, BRG pixels, and GBR pixels can be arranged repeatedly and continuously within the same pixel row.

[0027] In this case, the arrangement direction of the lenses provided on the parallax film 30 may be perpendicular to the pixel row direction. That is, the parallax film 30 can be attached to the display panel PNL in a direction perpendicular to the pixel row direction without being tilted.

[0028] Because adjacent pixel rows are arranged in a zigzag pattern with a shift of 1 / 4 subpixel width PW, and the parallax film 30 adheres to the display panel PNL perpendicular to the pixel row direction, the reduction in brightness of 2D images is minimized, and the viewpoint division of 3D images is made easier without overlapping views.

[0029] Figure 4 is a functional block diagram showing the display device according to this embodiment. The display device according to this embodiment includes the parallax film 30 described above, but it is omitted in Figure 4 for convenience.

[0030] Referring to Figure 4, the display device according to this embodiment may include a host system STM, a timing controller TCON, a data driver DRV that drives the data line DL of the display panel PNL, and a gate driver GRV that drives the gate line GL of the display panel PNL.

[0031] The liquid crystal cell Clc of the display panel PNL becomes the R, G, or B subpixel SP. The position of the subpixel SP is shifted by a predetermined interval on a pixel row basis.

[0032] The liquid crystal cell Clc is driven by the voltage difference between the pixel electrode 1, which charges the data voltage via the TFT, and the common electrode 2, to which the common voltage Vcom is applied. The common voltage Vcom is supplied to the common electrode 2 via a common voltage supply line. A storage capacitor Cst is connected to the liquid crystal cell Clc, which maintains the voltage of the liquid crystal cell for one frame period.

[0033] The host system (STM) can be implemented as a television system, set-top box, navigation system, DVD player, Blu-ray player, personal computer (PC), home theater system, or phone system. The host system (STM) converts the digital video data of the input image into a format suitable for the display panel (PNL). Along with the digital video data of the input image, the host system (STM) can transmit timing signals Vsync, Hsync, DE, and MCLK to the timing controller (TCON).

[0034] The timing controller TCON receives timing signals from the host system STM, including the vertical sync signal Vsync, the horizontal sync signal Hsync, the data enable signals Data Enable and DE, and the main clock CLK. These timing signals are synchronized with the digital video data of the input image. The timing controller TCON can use the timing signals Vsync, Hsync, DE, and CLK to generate source timing control signals to control the operating timing of the data driver DRV and gate timing control signals to control the operating timing of the gate driver GRV.

[0035] The timing controller TCON can activate a 2D mode for realizing a 2D image or a 3D mode for realizing a 3D image in response to an external input.

[0036] The timing controller TCON can transmit digital video data of the input image received from the host system STM to the data driver DRV. To improve the sharpness degradation of 2D images caused by pixel shift structures, the timing controller TCON may include data processing circuitry that is activated in 2D mode. In 2D mode, the timing controller TCON can transmit the output of the data processing circuitry to the data driver DRV.

[0037] Based on the source timing control signal, the data driver DRV can sample and latch video data and convert it into data for a parallel data scheme. The data driver DRV can then convert the latched data into an analog gamma-compensated voltage to generate a data voltage, which it can then supply to the data line DL.

[0038] Based on the gate timing control signal, the gate driver GRV can generate and supply gate pulses (or scan pulses) synchronized with the data voltage to the gate line GL.

[0039] Figure 5 shows the configuration of the data processing circuit of the display device according to this embodiment. Figure 6 shows the operation of the data processing circuit in Figure 5. Figures 7 to 9 are diagrams necessary to explain the data processing operation in Figure 6.

[0040] Referring to Figures 5 and 6, this embodiment of the DSP data processing circuit is intended to improve the sharpness reduction problem that occurs when displaying a 2D image on a display panel having a pixel structure for 3D implementation. Therefore, the DSP data processing circuit is activated in 2D mode, and at least some of its components do not need to operate in 3D mode.

[0041] The DSP data processing circuit may include an input circuit 100, a detection circuit 102, a color map conversion circuit 104, a subpixel rendering circuit 106, a bypass circuit 108, and an output circuit 110.

[0042] In 2D mode, the input circuit 100 receives video data from an external video source circuit (such as a host system) to realize a 2D input video.

[0043] The detection circuit 102 searches for characters in the 2D input video data and detects whether the characters are of the clear type or the non-clear type.

[0044] The detection circuit 102 can detect edge regions of 2D input image data using a predetermined operator (e.g., the Sobel operator) to find the position of characters within the 2D input image data. The Sobel operator is a typical first derivative slope operator. Characters generally show a large difference in pixel values ​​from the surrounding background, and since the pixel values ​​within characters are similar to each other, a large slope value appears at the edges of characters. The detection circuit 102 can use the image showing the character position obtained via the Sobel operator as a mask to detect edge regions corresponding to the character portion from the input image.

[0045] The detection circuit 102 can detect whether the edge image data is of the clear type or the non-clear type based on the amount of change in the color difference component (Cb, Cr) or the amount of change in the luminance component (Y) of the edge image data that realizes the edge region.

[0046] The detection circuit 102 can detect edge image data in a clear type if the amount of change in the chromatic difference components (Cb, Cr) of the edge image data exceeds a predetermined threshold, or if the amount of change in the luminance component (Y) of the edge image data exceeds a predetermined threshold. The detection circuit 102 can detect edge image data in a non-clear type if the amount of change in the chromatic difference components (Cb, Cr) of the edge image data does not exceed a predetermined threshold, and the amount of change in the luminance component (Y) of the edge image data does not exceed a predetermined threshold.

[0047] Clear Type is a font rendering technique used in Microsoft Windows to improve the appearance of text on computer display screens in a specific way. As shown in Figure 7(C), the Clear Type rendering method uses anti-aliasing to further smooth text at the subpixel level and reduce aliasing. While the grayscale rendering method (Figure 7(B)) uses pixel-level grayscale anti-aliasing, the Clear Type rendering method (Figure 7(C)) uses subpixel-level anti-aliasing. The human eye is sensitive to changes in brightness but less sensitive to changes in color, so it doesn't perceive color changes well within a narrow range. Taking this into account, Clear Type rendering actually sacrifices one aspect of image quality (color) for the sake of brightness differences. When black grayscale text is displayed on a white grayscale background, Clear Type rendering uses a method of decreasing or increasing the grayscale in RGB subpixel order to reduce abrupt brightness changes between the background and the text. However, because ClearType rendering was developed only for RGB Stripe standards, it is difficult to achieve the desired anti-aliasing effect when the pixel structure is a mix of RGB / GBR / BRG.

[0048] ClearType rendering can only be applied to TrueType or OpenType fonts used to represent user and system applications. For example, text entered in Microsoft Word can be represented using ClearType rendering technology. In other words, ClearType rendering technology can only be applied to text displayed on certain types of computer displays.

[0049] Because display panels have pixel shift structures such as RGB, BRG, and GBR for 3D implementation, a color map conversion process is necessary to convert the color map of the input video data to match the pixel shift structure. However, if the input video contains clear-type video data, problems such as unintended blurring of character boundaries or reduced sharpness may occur after the color map conversion process. As mentioned above, this is because clear-type video data is optimized for an RGB stripe structure.

[0050] The bypass circuit 108 receives the detection result from the detection circuit 102. When the edge image data that realizes the edge area of ​​the 2D input image is of the clear type, the bypass circuit 108 can output the clear type edge image data without applying the color map conversion corresponding to the pixel shift structure of the display panel. By bypassing the edge image data that constitutes clear type characters without color map conversion in this way, side effects such as sharpness reduction can be minimized in the image at that location. In other words, by bypassing the edge image data that constitutes clear type characters without color map conversion, an anti-aliasing effect equivalent to that of applying the clear type can be obtained.

[0051] The color map conversion circuit 104 receives the detection result from the detection circuit 102. The color map conversion circuit 104 can convert and output the color map of non-clear type edge image data and the color map of non-edge image data to match the pixel shift structure of the display panel. Non-edge image data is image data that represents the remaining area of ​​the input image excluding the edge region.

[0052] The color map conversion operation of the color map conversion circuit 104 can be explained as follows, referring to the pixel shift structure in Figure 3.

[0053] For the 4k-3 (where k is a natural number) pixel row in an RGB repeat, the colormap shift is omitted. The colormap for the 4k-2 pixel row in a BRG repeat is shifted to the right by 1 / 4 subpixel width PW compared to the 4k-3 pixel row. The colormap for the 4k-1 pixel row in a GBR repeat is shifted to the right by 1 / 4 subpixel width PW compared to the 4k-2 pixel row. The colormap for the 4k pixel row in an RGB repeat is shifted to the right by 1 / 4 subpixel width PW compared to the 4k-1 pixel row.

[0054] The subpixel rendering circuit 106 receives the detection results from the detection circuit 102, and further receives the color map conversion results from the color map conversion circuit 104.

[0055] The subpixel rendering circuit 106 can improve line zagging that occurs in non-clear type edge image data by performing anti-aliasing on the converted non-clear type edge image data and outputting it. The reason line zagging is perceived is that the RGB arrangement order differs depending on the position when pixel shift is applied, resulting in a large variation in the luminance peak depending on the vertical position when representing a straight line.

[0056] The subpixel rendering circuit 106 improves line jaggedness through subpixel rendering, taking into account the G subpixel position and surrounding subpixels, in order to minimize the variation in brightness peaks for each position.

[0057] In a typical RGB stripe structure, the brightest G subpixel is located in the center, and the R / B subpixels are located to the left and right of the G subpixel. Since the order of these subpixels is the same regardless of their position, there are no sharpness issues. However, pixel shift structures are designed with 3D image quality in mind, and because the RGB order is shifted by a fixed unit in the direction of the pixel column, a decrease in sharpness can occur. The reasons for this decrease in sharpness are, firstly, that the position of the brightest G subpixel changes, altering the brightness profile, and secondly, that the RGB order differs between adjacent pixel rows.

[0058] To solve this, the subpixel rendering circuit 106 can modify the brightness of the first edge image data displayed in the subpixel of the target pixel and the brightness of the second edge image data displayed in any one of the surrounding pixels adjacent to the target pixel, so that the brightness peak of the brightness profile of each pixel corresponding to the non-clear type edge image data is located in the center of each pixel.

[0059] The subpixel rendering circuit 106 uses subpixels around a target pixel so that the luminance peak of the luminance profile of that pixel may be located in the center of that pixel.

[0060] For example, as shown in Figure 8, in the non-shifted luminance profile (L-Profile 1) of the (2) BRG pixel (target pixel), the luminance peak is biased towards the right G subpixel. Therefore, if the luminance of the G subpixel is reduced by a first value through subpixel rendering, and the luminance of the left G subpixel belonging to the adjacent pixel is increased by a first value, the luminance peak of the target pixel's luminance profile (L-Profile 2) will be shifted to the center of the target pixel (see (2)'GBRG).

[0061] (3) In the non-shifted luminance profile (L-Profile 1) of a GBR pixel (target pixel), the luminance peak will be biased towards the left G subpixel. Therefore, if the luminance of the R subpixel is reduced by 1 value through subpixel rendering, and the luminance of the left R subpixel belonging to the adjacent pixel is increased by 1 value, the luminance peak of the target pixel's luminance profile (L-Profile 2) will be shifted to the center of the target pixel (see (3)'RGBR).

[0062] The subpixel rendering operation performed by the subpixel rendering circuit 106 can be described in more detail with reference to Figure 9 as follows.

[0063] Referring to Figure 9, the subpixel rendering circuit 106 lowers the B luminance of the target pixel and increases the B luminance of the left adjacent pixel in the RGB values ​​at the 4th, 6th, and 11th pixel rows, thereby shifting the luminance peak of the target pixel's luminance profile towards the center of the target pixel.

[0064] The subpixel rendering circuit 106 lowers the G luminance of the target pixel and increases the G luminance of the pixel to its left in the BRG at the positions of pixel rows 2, 7, 9, and 12, thereby shifting the luminance peak of the target pixel's luminance profile towards the center of the target pixel.

[0065] The subpixel rendering circuit 106, in the GBR at the 5th and 10th pixel rows, lowers the G luminance of the target pixel and increases the G luminance of the pixel to its right, shifting the luminance peak of the target pixel's luminance profile towards the center of the target pixel.

[0066] The subpixel rendering circuit 106, in the GBR at the 3rd and 8th pixel row positions, lowers the R luminance of the target pixel, increases the R luminance of the pixel to its left, and shifts the luminance peak of the target pixel's luminance profile toward the center of the target pixel.

[0067] In this way, the subpixel rendering circuit 106 performs subpixel rendering based on the luminance profile and the degree of pixel shift to minimize fluctuations in the luminance peak. At this time, the rendering weights for luminance adjustment can be adjusted differently depending on the luminance profile and the degree of pixel shift.

[0068] The output circuit 110 receives the outputs of the color map conversion circuit 104, the subpixel rendering circuit 106, and the bypass circuit 108, and sends them to the date driver.

[0069] Figure 10 shows the result of applying a color map conversion to non-clear type edge image data.

[0070] As shown in Figure 10, if non-clear edge image data is not color-mapped according to the pixel shift structure, a color mismatch will occur. To prevent such a color mismatch, it is necessary to perform a color-map conversion according to the pixel shift structure in the case of non-clear edge image data.

[0071] Figure 11 shows that no color map conversion has been applied to the clear type edge image data.

[0072] As shown in Figure 11, when clear-type edge image data is color-mapped to match a pixel-shift structure, the edge data becomes abnormally mixed, the anti-aliasing effect of the clear type cannot be expected, and the image sharpness is also significantly reduced.

[0073] Therefore, by skipping and bypassing the color map conversion operation for clear-type edge video data, it becomes possible to improve the sharpness reduction problem of the image while still expecting some degree of anti-aliasing effect from the clear-type.

[0074] From the above description, those skilled in the art will understand that various changes and modifications are possible without departing from the technical concept of the present invention. Therefore, the technical scope of the present invention is not limited to what is described in the detailed description of the disclosure, but should be defined by the claims. [Explanation of symbols]

[0075] PNL Display Panel 30 Parallax Film 102 Detection Circuit 104 Color Map Conversion Circuit 106 subpixel rendering circuit 108 Bypass Circuit

Claims

1. Display panel having a pixel shift structure for three-dimensional (3D) implementation, A parallax film located on the display panel, which includes multiple lenses, and In two-dimensional (2D) mode, if the edge image data representing the edge area of ​​the 2D input image is of the clear type, a bypass circuit outputs the clear type edge image data without applying the color map conversion corresponding to the pixel shift structure of the display panel. A display device that includes a display device.

2. The display device according to claim 1, further comprising a detection circuit that detects edge regions of 2D input image data by applying a predetermined operator to the 2D input image data, and detects whether the edge image data is of the clear type or the non-clear type based on the amount of change in the color difference component or the amount of change in the luminance component of the edge image data representing the edge region.

3. A color map conversion circuit that converts and outputs the color map for the non-clear type edge image data and the color map for the non-edge image data to match the pixel shift structure of the display panel, and A subpixel rendering circuit that performs anti-aliasing on the non-clear type edge image data, which has been converted using the aforementioned color map, and outputs anti-aliased edge image data. The display device according to claim 2, further comprising:

4. The aforementioned subpixel rendering circuit is The display device according to claim 3, wherein the brightness of the first edge image data displayed on a subpixel of a target pixel and the brightness of the second edge image data displayed on any one subpixel of a surrounding pixel adjacent to the target pixel are changed so that the brightness peak of the brightness profile of each pixel corresponding to the non-clear type edge image data is located in the center of each pixel.

5. The display panel includes a first pixel row containing a first pixel and a second pixel row containing a second pixel adjacent to the first pixel, The position of the second pixel is shifted relative to the position of the first pixel by a predetermined interval in the pixel row direction. The display device according to claim 1, wherein the arrangement direction of the plurality of lenses is perpendicular to the pixel row direction.

6. The display device according to claim 5, wherein the predetermined interval is 1 / 4 of the width of one subpixel.

7. A data processing method for a display device having a display panel having a pixel shift structure for three-dimensional (3D) mounting, and a parallax film located on the display panel and including a plurality of lenses, A data processing method for a display device, which includes outputting the clear type edge image data in a two-dimensional (2D) mode, when the edge image data representing the edge area of ​​the input image is of the clear type, without applying a color map conversion corresponding to the pixel shift structure of the display panel.

8. A data processing method for a display device according to claim 7, further comprising: applying a predetermined operator to two-dimensional (2D) input image data to detect edge regions of the 2D input image data; and detecting whether the edge image data is of the clear type or the non-clear type based on the amount of change in the color difference component or the amount of change in the luminance component of the edge image data that embodies the edge region.

9. The color map for the non-clear type edge image data and the color map for the non-edge image data are converted and output to match the pixel shift structure of the display panel. The aforementioned color map is converted to non-clear type edge image data, which is then subjected to anti-aliasing to output anti-aliased edge image data. A data processing method for a display device according to claim 8, further comprising:

10. The aforementioned non-clear type edge image data is subjected to anti-aliasing. A data processing method for a display device according to claim 9, comprising changing the brightness of a first edge image data displayed on a subpixel of a target pixel and the brightness of a second edge image data displayed on one subpixel of any of the surrounding pixels adjacent to the target pixel, such that the brightness peak of the brightness profile of each pixel corresponding to the non-clear type edge image data is located in the center of each pixel.

Images