KR20200003429A - Organic Light Emitting Display Device and Driving Method Thereof - Google Patents

Abstract

The present invention relates to an organic electroluminescent display device capable of improving the image quality. The organic electroluminescent display device of the present invention comprises: a pixel unit having sub-pixels; a scan drive unit driving scan lines connected to the sub-pixels with a line as a unit; a data drive unit driving data lines positioned in a direction crossing the scan lines; and a data processing unit generating second data using first data supplied from the outside. The data processing unit changes the gradation of the first data supplied to sub-pixels positioned at the edge of the pixel unit to generate the second data.

Description

Organic Light Emitting Display Device and Driving Method Thereof}

Embodiments of the present invention relate to an organic light emitting display device and a driving method thereof, and more particularly, to an organic light emitting display device and a driving method thereof for improving image quality.

An organic light emitting display device displays an image using an organic light emitting diode, which is a self-luminous element, and is attracting attention as a next generation display device because of excellent brightness and color purity.

Such an organic light emitting display device configures a plurality of pixels using red subpixels, green subpixels, and blue subpixels, thereby displaying various color images.

The red subpixels, the green subpixels and the blue subpixels may be arranged in various forms, and are generally arranged in a stripe shape. The stripe type is a form in which subpixels of the same color are arranged in columns.

However, when the subpixels are arranged in a stripe shape, the aperture ratio is lowered due to the black matrix positioned between the respective subpixels, and the expressability of the high resolution is deteriorated.

To overcome this problem, "ClairVoyante Laboratories" has proposed a pixel array structure called "The Pentile Matrix color pixel arrangement." In the pentile matrix pixel array structure, red subpixels and blue subpixels are alternately formed in the same column, and green subpixels are formed in adjacent columns. Such a pentile matrix pixel array structure has an advantage that the number of subpixels is reduced to approximately two thirds as compared with the stripe type, thereby securing a high open rate. In addition, the application of the pentile matrix pixel array structure improves the expressive ability of high resolution, and has the advantage of improving the image quality with the structure that the vertical line pattern by the specific pixel is not visible.

However, in the case of the conventional pentile matrix structure, there is a problem in which green and red are recognized in the form of stripes at the edges (greenish and pinkish).

Accordingly, it is an object of an embodiment of the present invention to provide an organic light emitting display device and a driving method thereof for improving image quality.

An organic light emitting display device according to an embodiment of the present invention comprises: a pixel portion including sub-pixels; A scan driver for driving scan lines connected to the sub-pixels in line units; A data driver for driving data lines positioned in a direction crossing the scan lines; A data processor for generating second data using first data supplied from the outside; The data processor generates the second data by changing the gray level of the first data supplied to the subpixels positioned at the edge of the pixel unit.

Preferably, the data processing unit includes a dimming unit for generating the second data. The dimming unit generates the second data by changing the gray level of the first data to be low. The dimming unit generates the second data by changing the first data supplied to the subpixels positioned at the outermost edges of the four sides of the pixel unit. Pixel areas are provided in the pixel portion, and one of the blue and red subpixels and the green subpixel are disposed in each of the pixel areas in a diagonal direction. The red and blue subpixels are repeatedly arranged in a specific column, and the green subpixels are repeatedly arranged in a column adjacent to the specific column.

According to an embodiment of the present invention, there is provided a method of driving an organic light emitting display device, the method comprising: detecting a pattern of data corresponding to a position of a panel, and supplying to a subpixel located at an edge of the panel corresponding to the pattern of data Generating second data by changing a gray level of the first data to be used.

Preferably, the panel includes pixel regions, and one of the blue and red subpixels and the green subpixel are disposed diagonally to each of the pixel regions. The red and blue subpixels are repeatedly arranged in a specific column of the panel, and the green subpixels are repeatedly arranged in a column adjacent to the specific column. Blue subpixels, red subpixels, and two green subpixels arranged in two pixel regions adjacent to each other form a pixel. The second data is generated by lowering the gray level in the first data.

 The generating of the second data may include determining whether the first data is supplied to a first line, a last line, or another line; Generating the second data by changing a gray level of the first data supplied to all sub-pixels located in the first line when the first line corresponds to the first line; Generating the second data by changing a gray level of the first data supplied to all sub-pixels positioned in the last line when the last line corresponds to the last line; The second data may be generated by changing a gray level of the first data supplied to the first subpixel and the last subpixel when the other lines correspond to the other lines.

The generating of the second data corresponding to the first line may include generating the second data corresponding to the pattern of the data and supplying the first data to the outermost subpixels among the subpixels included in the first pixel and the last pixel. Changing the gray level to generate the second data; And generating the second data by changing a gray level of the first data supplied to the outermost subpixels among the subpixels not included in the first pixel and the last pixel.

The generating of the second data corresponding to the last line may include the gray level of the first data supplied to the subpixels positioned at the outermost of the subpixels included in the first pixel and the last pixel corresponding to the pattern of data. Generating the second data by changing a; And generating the second data by changing the gray level of the first data supplied to the subpixels positioned at the outermost of the subpixels not included in the first pixel and the last pixel.

The generating of the second data corresponding to the other lines may include determining whether the first subpixel is the first subpixel or the last subpixel, and when the first subpixel is determined as the first subpixel, corresponding first data corresponding to a pattern of data. Generating second data by changing a gray level of the second data; and generating second data by changing a gray level of the corresponding first data according to a pattern of the data when it is determined as the last sub-pixel. Determining whether the first subpixel and the last subpixel are located in odd or even lines.

According to the organic light emitting display device and the driving method thereof, the luminance of the subpixels positioned at the outermost edge can be lowered, thereby preventing the green and the red from being recognized in the form of a string.

1 is a diagram illustrating a pixel array structure of an organic light emitting display device according to an exemplary embodiment of the present invention.
2A to 2D are diagrams showing patterns of data corresponding to positions of panels.
3A to 3D are diagrams illustrating that a specific color is recognized in the form of a line corresponding to the position of the panel.
4 is a diagram illustrating an organic light emitting display device according to an exemplary embodiment of the present invention.
5 is a diagram illustrating an embodiment of a data processing unit according to an embodiment of the present invention.
6 is a flowchart illustrating an operation process of a dimming unit according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to FIGS. 1 to 6, which are attached to a preferred embodiment for easily carrying out the present invention by those skilled in the art.

1 is a diagram illustrating a pixel array structure of an organic light emitting display device according to an exemplary embodiment of the present invention.

Referring to FIG. 1, in an organic light emitting display according to an exemplary embodiment of the present invention, red (R) and blue (B) subpixels are repeatedly arranged in a specific column, and green (G) subpixels are repeatedly arranged adjacent to a specific column. Is placed. That is, in the present invention, the subpixels R, G, and B are arranged in the form of pen tiles.

Each of the pixel regions 100 includes red (R) and green (G) subpixels or blue (B) and green (G) subpixels. In the pixel area 100, the red (R) and green (G) sub-pixels are positioned diagonally to each other. In this case, the distance between the red (R) and green (G) sub-pixels can be set wider, and thus there is an advantage that can be applied to a high resolution panel. Similarly, the blue (B) and green (G) sub-pixels in the pixel region 100 are also positioned diagonally. Meanwhile, in the organic light emitting display device of the present invention, the sub pixels R, G, B, and G located in two adjacent pixel areas 100 are driven as one pixel.

In the pixel array structure of the present invention, the green (G) sub-pixel may be formed to have a smaller area than the red and blue sub-pixels (R, B) in consideration of light emission efficiency. In addition, the blue subpixel B may have a larger area than the red subpixel corresponding to the luminous efficiency. The area of the sub pixels R, G, and B may be changed in various forms in consideration of light emission efficiency.

On the other hand, when the panel having the pixel array structure of the present invention is used in a portable device, the data is changed and supplied in accordance with the change in the position of the panel.

For example, as shown in FIG. 2A, when the panel is driven at the normal position, data is supplied in the first patterns R, G, B, G,... And, when rotated 90 degrees to the left of the panel, the data is supplied in the second pattern (G, B, G, R, ...) as shown in Figure 2b. In addition, when the panel is rotated 90 degrees to the right, data is supplied in the third patterns B, G, R, G, ... as shown in FIG. 2C. When the panel is inverted up and down, data is supplied to the fourth patterns G, R, G, B, ... as shown in FIG. 2D.

However, in the present invention in which subpixels are arranged in the form of a pen tile, a specific color is recognized at an edge.

In fact, when data is input in the first pattern, as shown in FIG. 3A, pinkish colors are displayed on the upper and left sides, and greenlish colors are strongly displayed on the lower and right sides. Likewise, as shown in FIGS. 3B to 3D, even when data is supplied in the second to fourth patterns, pink and green colors appear strongly at the edges.

In the present invention, in order to overcome such a problem, the data supplied to the subpixels R, G, and B located at the four side edges of the panel are dimmed. Here, dimming means lowering the gradation of data supplied to the four side edges in order to prevent a particular color from being strongly observed in the form of vertical lines and horizontal lines.

4 is a diagram illustrating an organic light emitting display device according to an exemplary embodiment of the present invention.

Referring to FIG. 4, an organic light emitting display device according to an exemplary embodiment of the present invention includes a scan driver 10 for driving scan lines S1 to Sn and a data driver for driving data lines D1 to Dm. (20), the timing controller 50 for controlling the scan driver 10 and the data driver 20, and the first data data1 supplied from the outside are dimmed to generate the second data data2. It has a data processing unit 30 for.

Subpixels R, G, and B of the present invention are disposed in the pixel portion 40 where the scan lines S1 to Sn and the data lines D1 to Dm cross each other.

The scan driver 10 supplies a scan signal to the scan lines S1 to Sn. Here, the scan driver 10 may supply the scan signal in the forward or reverse direction corresponding to the position of the panel.

The data driver 20 generates a data signal using the second data and supplies the data signal to the data lines D1 to Dm to synchronize the generated data signal with the scan signal. Then, the data signal is supplied to the subpixels R, G, and B selected by the scan signal.

The timing controller 50 supplies a control signal (not shown) for controlling the scan driver 10 and the data driver 20. In addition, the timing controller 50 transfers the second data data2 supplied from the data processor 30 to the data driver 20.

The data processor 30 detects patterns of data (first to fourth patterns), and dims the first data data1 corresponding to the detected patterns to generate second data data2. In practice, the data processor 30 generates the second data data2 by lowering the gray level of the first data data1 to be supplied to the outermost subpixels of the panel so that a specific color is not observed at the edge of the panel. Detailed operation will be described later.

5 is a diagram illustrating an embodiment of a data processing unit according to an embodiment of the present invention.

Referring to FIG. 5, the data processor 30 according to an embodiment of the present invention includes an SPR unit 32 and a dimming unit 34.

The sub pixel rendering unit 32 refers to an algorithm for improving readability of letters and the like. Such an SPR unit 32 is associated with a pentile may be applied to any one of various types of algorithms currently known. In addition, the SPR unit 32 may be omitted in the present invention.

The dimming unit 34 generates the second data data2 by controlling the gray level of the first data data1 to be supplied to the subpixels positioned at the outermost edge of the panel in response to the pattern of the data.

6 is a flowchart illustrating an operation process of a dimming unit according to an embodiment of the present invention.

Referring to FIG. 6, the dimming unit 34 checks whether the first data data1 input to the dimming unit 34 is data of the first line or the last line. In fact, as illustrated in FIGS. 3A to 3D, the first data data1 supplied to the first line and the last line should be generated as the second data data2 by dimming on a line basis.

In addition, the dimming unit 34 generates second data data2 by dimming the first data data1 to be supplied to the first subpixel and the last subpixel positioned in the remaining lines except for the first line and the last line. That is, the dimming unit 34 generates the second data data2 by lowering the gray level of the first data data1 to be supplied to the subpixels R, G, and B located at the edge of the panel. 2 data data2 is supplied to the timing control part 50. As shown in FIG.

In detail, the dimming unit 34 first determines whether the first data data1 input from the outside is the data to be supplied to the first line. (S200) In step S200, the first data data1 is determined. If it is determined that the data is to be supplied to the first line, the data pattern is inspected (S202). Here, the data pattern is the first pattern, the second pattern, the third pattern, and the fourth pattern as shown in FIGS. 3A to 3D. Separated by.

If the data is determined as the first pattern in step S202, it is determined whether the first data data1 is supplied to the first pixel (S204).

If it is determined in step S204 that the first data data1 is supplied to the first pixel, it is determined whether the data is the second pattern or the fourth pattern. (S206) Here, since the data is determined as the first pattern in step S202, the color is red. The first data data1 to be supplied to the subpixel R and the blue subpixel B is dimmed to generate the second data data2 (S214) (R located at the top / left of FIG. 3A, B dimming)

If the first data data1 does not correspond to the first pixel in step S204, it is determined whether the first data is input to the last pixel. (S210) If it is determined in step S210 that the first data data1 is supplied to the last pixel, the data is stored. It is determined whether the pattern is the first pattern or the third pattern (S212). Here, since the data is determined as the first pattern in step S202, the data corresponds to the red subpixel R, the blue subpixel B, and the green subpixel G2. One first data data1 is dimmed. (R, B, G dimming processes located on the upper / right side of FIG. 3A) Here, the green subpixels denoted by G2 are the same pixels as the blue subpixels B. FIG. It means to be located in the area 100. For the convenience of explanation, the green subpixel located in the same pixel area 100 as the red subpixel R will be referred to as G1. On the other hand, when it is not determined as the last pixel in step S210, that is, in the case of pixels located between the first pixel and the last pixel, the dimming process is performed corresponding to the red subpixel R and the blue subpixel B (S214). As described above, when the data of the first pattern is input, the first data data1 corresponding to the subpixels located at the upper edge is dimmed through the steps S202 to S214, so that the second data data2 is dimmed. Is generated.

If the data is determined as the second pattern in step S202, it is determined whether the first data data1 is supplied to the first pixel (S204).

If it is determined in step S204 that the first data data1 is supplied to the first pixel, it is determined whether the data is the second pattern or the fourth pattern. (S206) Here, since the data is determined as the second pattern in step S202, Second data data2 is generated by dimming the first data data1 to be supplied to the red subpixel R, the blue subpixel B, and the green subpixel G2 included in the first pixel. (R, B, G dimming process located on the upper / left side of FIG. 3B)

In operation S204, when the first data data1 does not correspond to the first pixel, it is determined whether the first data is input to the last pixel. In operation S210, when it is determined that the first data data1 is supplied to the last pixel, the data is first stored. It is determined whether the pattern is the first pattern or the third pattern (S212). Here, since the data is determined as the second pattern in step S202, the first data data1 corresponding to the red subpixel R and the blue subpixel B is determined. (S214) (R and B dimming processes located at the top / right side of FIG. 3B) On the other hand, when it is not determined as the last pixel in step S210, that is, of pixels located between the first pixel and the last pixel. In this case, dimming is performed in response to the red subpixel R and the blue subpixel B. (S214) As described above, when the data of the second pattern is input, it is positioned at the upper edge through steps S202 to S214. To subpixels One first data data1 is dimmed to generate second data data2.

If the data is determined to be the third pattern in step S202, it is determined whether the first data data1 is supplied to the first pixel (S304).

If it is determined in step S304 that the first data data1 is supplied to the first pixel, it is determined whether the data is the first pattern or the third pattern. (S306) Here, since the data is determined as the third pattern in step S202, the first pattern is determined. The first data data1 to be supplied to the green subpixels G1 and G2 and the blue subpixel B included in the first pixel is dimmed to generate the second data data2 (S308) (FIG. 3C). B, G, G dimming on the top / left side of

In operation S304, if the first data data1 does not correspond to the first pixel, it is determined whether the first data is input to the last pixel. In operation S310, if it is determined that the first data data1 is supplied to the last pixel, the data may be input. In operation S202, the first data data1 corresponding to the green subpixels G1 and G2 is dimmed, since the data is determined as the third pattern in operation S202. (S314) (G, G dimming process located at the top / right side of FIG. 3C) Meanwhile, if it is not determined as the last pixel in step S310, that is, in the case of pixels located between the first pixel and the last pixel, green sub-ization is performed. And the dimming process corresponding to the first and second G1 and G2 (S314). As described above, when data of the third pattern is input, the subpixels located at the upper edges are subjected to steps S202, S304 to S314. Corresponding first data (data1) Is dimmed to generate second data data2.

If it is determined in step S202 that the data is the fourth pattern, it is determined whether the first data data1 is supplied to the first pixel (S304).

If it is determined in step S304 that the first data data1 is supplied to the first pixel, it is determined whether the data is the first pattern or the third pattern (S306). Since the data is determined as the fourth pattern in step S202, the first pattern is determined. The second data data2 is generated by dimming the first data data1 to be supplied to the green subpixels G1 and G2 included in the pixel (S314) (G located at the top / left side of FIG. 3D). , G dimming)

In operation S304, if the first data data1 does not correspond to the first pixel, it is determined whether the first data is input to the last pixel. In operation S310, if it is determined that the first data data1 is supplied to the last pixel, the data may be input. It is determined whether the pattern is the second pattern or the fourth pattern (S312). In this case, since the data is determined as the fourth pattern in step S202, the green subpixels G1 and G2 and the blue subpixel B included in the last pixel are determined. The first data data1 to be supplied is dimmed to generate second data data2 (S308) (G, G, and B dimming processes located on the upper and right sides of FIG. 3D). If it is not determined, that is, the pixels located between the first pixel and the last pixel, the dimming process is performed corresponding to the green subdivisions G1 and G2. (S314) As described above, the data of the fourth pattern is If it is input, the steps S202, S304 to S314 As a result, the first data data1 corresponding to the subpixels positioned at the upper edge is dimmed to generate the second data data2.

On the other hand, if it is determined that the data to be supplied to the first line in step S200, it is determined whether the data to be supplied to the last line (S300). In step S300, the first data (data1) is determined to be the data to be supplied to the last line. If so, the data pattern is checked (S302).

If the data is determined as the first pattern in step S302, it is determined whether the first data data1 is supplied to the first pixel or the last pixel. (S304, S310) In step S304, the first data data1 is the first pixel. If it is determined that the data is supplied to the second data, it is determined whether the first data data1 is the first pattern or the third pattern. (S306) Here, since the data is determined as the first pattern in step S302, the green sub included in the first pixel. The first data data1 to be supplied to the pixels G1 and G2 and the blue subpixel B is dimmed to generate second data data2 (S308) (located at the bottom / left of FIG. 3A). B, G, G Dimming)

When it is determined in step S310 that the first data data1 is supplied to the last pixel, it is determined whether the first data data1 is the second pattern or the fourth pattern (S312). In this case, the data is the first pattern in step S302. Since the first data data1 to be supplied to the green subpixels G1 and G2 included in the last pixel is dimmed, the second data data2 is generated (S314) (lower side in FIG. 3A). G and G dimming processes located on the right) Meanwhile, when it is not determined as the last pixel in operation S310, that is, in the case of pixels located between the first pixel and the last pixel, dimming is performed corresponding to the green subpixels G1 and G2. (S314) As described above, when the data of the first pattern is input, the first data data1 corresponding to the subpixels positioned at the lower edges is dimmed through the steps S302 to S314. 2 data (data2) is generated.

If the data is determined as the second pattern in step S302, it is determined whether the first data data1 is supplied to the first pixel or the last pixel. (S304, S310) In step S304, the first data data1 is the first pixel. If it is determined that the data is supplied to the first data (data1) is determined whether the first pattern or the third pattern (S306) Here, since the data is determined as the second pattern in step S302, the green sub included in the first pixel The second data data2 is generated by dimming the first data data1 to be supplied to the pixels G1 and G2 (S314) (G and G dimming processes located at the bottom / left of FIG. 3B).

If it is determined in step S310 that the first data data1 is supplied to the last pixel, it is determined whether the first data data1 is the second pattern or the fourth pattern (S312). In operation S308, the second data data2 is generated by dimming the first data data1 to be supplied to the green subpixels G1 and G2 and the blue subpixel B included in the last pixel. (G, G, B dimming process located at the bottom / right side of FIG. 3B) Meanwhile, if it is not determined as the last pixel in step S310, that is, in the case of pixels located between the first pixel and the last pixel, green subpixels. Dimming is performed according to (G1, G2). (S314) As described above, when data of the second pattern is input, the first pixel corresponding to the subpixels located at the lower edges is passed through steps S302 to S314. The data data1 is dimmed so that the second data data2 It is generated.

When the data is determined as the third pattern in operation S302, it is determined whether the first data data1 is supplied to the first pixel or the last pixel. (S204, S210) In operation S204, the first data data1 is the first pixel. If it is determined that the first data data1 is the second pattern or the fourth pattern, it is determined whether the data is supplied to the second pattern (S206). In this case, since the data is determined as the third pattern in step S302, the red sub included in the first pixel. The first data data1 to be supplied to the pixel R and the blue subpixel B is dimmed to generate second data data2 (S214) (R and B located at the bottom / left side of FIG. 3C). Dimming)

If it is determined in step S210 that the first data data1 is supplied to the last pixel, it is determined whether the first data data1 is the first pattern or the third pattern (S212). Since the first data data1 to be supplied to the red subpixel R, the blue subpixel B, and the green subpixel G2 included in the last pixel is dimmed, the second data data2 is generated. (S208) (R, B, G dimming process located at the bottom / right side of FIG. 3C) Meanwhile, if it is not determined as the last pixel in step S210, that is, the pixels located between the first pixel and the last pixel. Dimming is performed in response to the red subpixel R and the blue subpixel B. (S214) As described above, when data of the third pattern is input, the lower edge is passed through steps S302, S204, and S214. First data corresponding to sub-pixels located in the 1) is dimmed to generate second data data2.

If the data is determined to be the fourth pattern in step S302, it is determined whether the first data data1 is supplied to the first pixel or the last pixel. (S204, S210) In step S204, the first data data1 is the first pixel. If it is determined that the first data data1 is the second pattern or the fourth pattern, it is determined whether the data is the second pattern or the fourth pattern (S206). Here, since the data is determined as the fourth pattern in step S302, the red sub included in the first pixel is included. The first data data1 to be supplied to the pixel R, the blue subpixel B, and the green subpixel G2 is dimmed to generate the second data data2 (S208) (lower side in FIG. 3D /). G, B, R dimming on the left side)

If it is determined in step S210 that the first data data1 is supplied to the last pixel, it is determined whether the first data data1 is the first pattern or the third pattern (S212). Since it is determined that the first data data1 to be supplied to the red subpixel R and the blue subpixel B included in the last pixel is dimmed, the second data data2 is generated (S214). R and B dimming processes located at the bottom / right side of 3d) On the other hand, when it is not determined as the last pixel in step S210, that is, in the case of pixels located between the first pixel and the last pixel, the red subpixel R and the blue sub As described above, when the data of the fourth pattern is input, the dimming process is performed in correspondence to the pixel B. As described above, the sub-pixels corresponding to the sub-pixels positioned at the lower edges are subjected to steps S302, S204, and S214. The first data data1 is dimmed The second data (data2) are generated.

On the other hand, if it is determined that the data to be supplied to the last line in step S300, that is, if not located in the first line and the last line is checked the pattern of the data (S400).

When it is determined as the first pattern or the second pattern in step S400, it is determined whether the first data data1 is supplied to the first subpixel or the last subpixel. (S402, S411).

If it is determined that the first data (data1) corresponding to the first sub-pixel in step S402 is determined to be the first pattern. (S404) If it is determined as the first pattern in step S404, the first data (data1) is an odd line In operation S406, when it is determined that the first data data1 is supplied to the odd line, it is determined as the first data data1 supplied to the red sub-pixel R, and then dimmed. If it is determined in step S406 that the first data data1 is not supplied to the odd line, it is determined as the first data data1 supplied to the blue subpixel B and is dimmed.

If it is determined in step S404 that the first pattern is not determined, it is determined whether the first data data1 is supplied to the odd lines. (S414) If it is determined in step S414 that the first data data1 is supplied to the odd lines, the green sub It is determined that the first data data1 is supplied to the pixel G2 and is dimmed. (S416) If it is determined in step S414 that the first data data1 is not supplied to the odd line, it is supplied to the green subpixel G1. The first data data1 is determined to be dimmed and processed (S418).

If it is determined in step S411 that the first data data1 corresponding to the last sub-pixel is determined, it is determined whether it is the first pattern. (S412) If it is determined as the first pattern in step S412, the first data data1 is an odd-numbered line. In operation S414, when it is determined that the first data data1 is supplied to the odd-numbered line, the first data data1 supplied to the green sub-pixel G2 is determined and dimmed. If it is determined in step S414 that the first data data1 is not supplied to the odd line, it is determined as the first data data1 supplied to the green subpixel G1 and dimmed.

If it is determined in step S412 that the first pattern is not determined, it is determined whether the first data data1 is supplied to the odd line. (S406) If it is determined in step S406 that the first data data1 is supplied to the odd line, the red sub The first data data1 supplied to the pixel R is determined to be dimmed. (S408) If it is determined in step S406 that the first data data1 is not supplied to the odd line, the first data data1 is supplied to the blue subpixel B. The first data data1 is determined to be dimmed and processed (S410).

In fact, in the case of the present invention, when data is input in the first pattern or the second pattern, the subpixels positioned at the edges of the remaining lines except for the first line and the last line, that is, S400 for the first subpixel and the last subpixel. Dimming is performed using the steps S418 to S418.

If it is determined as the third pattern or the fourth pattern in step S400, it is determined whether the first data data1 is supplied to the first subpixel or the last subpixel. (S421, S425).

If it is determined that the first data (data1) corresponding to the first sub-pixel in step S421 is determined to be a third pattern. (S420) If it is determined as the third pattern in step S420, the first data (data1) is an odd line In operation S422, when it is determined that the first data data1 is supplied to the odd-numbered line, the first data data1 supplied to the blue sub-pixel B is determined and dimmed. If it is determined in step S422 that the first data data1 is not supplied to the odd lines, it is determined as the first data data1 supplied to the red subpixel R and is dimmed.

If it is determined in step S420 that the third pattern is not determined, it is determined whether the first data data1 is supplied to the odd line. (S424) If it is determined in step S424 that the first data data1 is supplied to the odd line, the green sub It is determined that the first data data1 supplied to the pixel G1 is dimmed. (S418) If it is determined in step S424 that the first data data1 is not supplied to the odd line, the first data data1 is supplied to the green subpixel G2. The first data data1 is determined to be dimmed and processed (S416).

If it is determined in step S425 that the first data data1 corresponds to the last sub-pixel, it is determined whether it is the third pattern. (S426) If it is determined in step S426 that it is the third pattern, the first data data1 is an odd line. In operation S424, when it is determined in step S424 that the first data data1 is supplied to the odd line, it is determined as the first data data1 supplied to the green sub-pixel G1 and dimmed. When it is determined in step S424 that the first data data1 is not supplied to the odd line, it is determined as the first data data1 supplied to the green subpixel G2 and dimmed.

If it is determined in step S426 that the third pattern is not determined, it is determined whether the first data data1 is supplied to the odd line. (S422) If it is determined in step S422 that the first data data1 is supplied to the odd line, the blue sub It is determined that the first data data1 supplied to the pixel B is dimmed. (S410) If it is determined in step S422 that the first data data1 is not supplied to the odd line, the first data data1 is supplied to the red subpixel R. The first data data1 is determined to be dimmed and processed (S408).

In fact, in the case of the present invention, when the data is input in the third pattern or the fourth pattern, the subpixels positioned at the edges of the remaining lines except for the first line and the last line, that is, the first subpixel and the last subpixel, are described in detail. Repeat the process and dimming.

As described above, the dimming unit 34 of the present invention is driven as shown in FIG. 6 while dimming the subpixels positioned at the edge of the panel corresponding to the first, second, third, and fourth patterns of data. do. Here, the dimming value corresponding to each subpixel R, B, G1, G2 is determined experimentally in consideration of the resolution, inch, luminous efficiency, etc. of the panel. For example, in a specific panel, the dimming process may be performed so that the luminance is lowered to 1/2 corresponding to the red subpixel R and the blue subpixel B to generate the second data data2. The green sub-pixel G1 is 3/5 and the green sub-pixel G2 is 4/7, so that the dimming process can be performed to generate the second data data2.

That is, the dimming unit 34 of the present invention may be driven as shown in FIG. 5 to detect red subpixels R, blue subpixels B, and green subpixels G1 and G2 positioned at the edges of the panel. In response thereto, various dimming processes are possible.

Although the technical idea of the present invention has been described in detail according to the above preferred embodiment, it should be noted that the above-described embodiment is for the purpose of description and not of limitation. In addition, those skilled in the art will understand that various modifications are possible within the scope of the technical idea of the present invention.

10: scan driver 20: data driver
30: data processing unit 32: SPR unit
34: dimming part 40: pixel part
50: timing controller 100: pixel area

Claims (18)

First color subpixels and second color subpixels arranged in only odd-numbered rows and odd-numbered columns and alternately arranged in each odd-numbered row and each odd-numbered column;
An organic light emitting display panel comprising third color subpixels arranged in even-numbered rows and even-numbered columns. According to claim 1,
The size of any one of the third color sub-pixels is smaller than the size of any one of the first color or the second color sub-pixels. The method of claim 2,
The first color subpixels emit red light, the second color subpixels emit blue light, and the third color subpixels emit green light. According to claim 1,
Each of the third color sub-pixels is positioned in a diagonal direction with respect to one sub-pixel of the first color or second color sub-pixels. According to claim 1,
And the third color sub-pixels are arranged only in the even-numbered rows and the even-numbered columns. First color subpixels and second color subpixels arranged in odd-numbered rows and odd-numbered columns and alternately arranged in at least one of each of the odd-numbered rows and the odd-numbered columns;
Third color sub-pixels arranged in even-numbered rows and even-numbered columns,
And each of the odd-numbered rows and the odd-numbered columns does not include a third color sub-pixel. First and second color subpixels arranged in odd-numbered rows and odd-numbered columns and alternately arranged in each odd-numbered row and each odd-numbered column, and in only even-numbered rows and even-numbered columns A display panel having the third color sub-pixels;
A scan driver for driving scan lines connected to the first, second and third color sub-pixels;
A data processor for receiving first data and generating second data based on the first data;
A data driver connected to the first color, second color, and third color sub-pixels to drive data lines driven by the first or second data;
The data processor may generate the second data by changing a gray level of first data corresponding to subpixels positioned at an edge of the display panel among the first, second and third color subpixels. , Display device. The method of claim 7, wherein
The data processor includes a dimming unit for generating the second data,
And the dimming unit determines whether the first data is data for a first line, a last line, or another line of the display panel. The method of claim 8,
The dimming unit generates the second data by lowering the gray level of the first data. The method of claim 9,
The dimming unit may include gray levels of first data corresponding to subpixels positioned in the first and last lines, and first data corresponding to a first subpixel and a last subpixel among subpixels positioned in the other lines. And lowering the second data to generate the second data. The method of claim 8,
The dimming unit generates the second data by changing a gray level of the first data corresponding to the subpixels selected according to the determination of the dimming unit among the subpixels located in each column of the display panel. The method of claim 7, wherein
The size of any one of the third color sub pixels is smaller than the size of any one of the first color or second color sub pixels. The method of claim 12,
And the first color sub pixels emit red light, the second color sub pixels emit blue light, and the third color sub pixels emit green light. The method of claim 7, wherein
The display panel operates at a plurality of positions,
Each of the plurality of positions has a sub-pixel color pattern based on the arrangement of the first, second and third color sub-pixels. The method of claim 14,
And the first data is supplied according to a sub pixel color pattern corresponding to each position of the display panel. The method of claim 15,
And the data processor detects the pattern of the first data and executes a dimming process on the first data based on the detected pattern of the first data. The method of claim 7, wherein
Each of the third color subpixels is positioned in a diagonal direction with respect to any one of the first and second color subpixels. The method of claim 7, wherein
Each of the odd-numbered rows and the odd-numbered columns includes at least one of the first color subpixels and at least one of the second color subpixels, but does not include a third color subpixel.

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