KR102400654B1 - Organic Light Emitting Display Device and Driving Method Thereof - Google Patents

Abstract

The present invention relates to an organic light emitting display device capable of improving image quality.
An organic light emitting display device of the present invention includes: a pixel unit including sub-pixels; a scan driver for driving scan lines connected to the sub-pixels on a line-by-line basis; a data driver for driving data lines positioned in a direction crossing the scan lines; a data processing unit configured to generate second data using first data supplied from the outside; The data processing unit generates the second data by changing the grayscale of the first data supplied to sub-pixels positioned at the edge of the pixel unit.

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 capable of improving image quality and a driving method thereof.

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

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

The red sub-pixels, the green sub-pixels, and the blue sub-pixels may be arranged in various shapes, and are generally arranged in a stripe shape. The stripe type is a form in which sub-pixels of the same color are arranged in units of columns.

However, when the sub-pixels are arranged in a straight line, there is a problem in that the aperture ratio is lowered due to the black matrix positioned between the respective sub-pixels, and the ability to express high resolution is lowered.

In order to overcome such a problem, "ClairVoyante Laboratories" has proposed a pixel arrangement structure called "The Pentile Matrix color pixel arrangement". In the pentile matrix pixel array structure, red sub-pixels and blue sub-pixels are alternately formed in the same column, and green sub-pixels are formed in adjacent columns. The pentile matrix pixel array structure has an advantage in that the number of sub-pixels is reduced to about 2/3 compared to that of the stripe type, and thus a high rate can be secured. In addition, when the pentile matrix pixel arrangement structure is applied, the high-resolution expression ability is improved, and the image quality can be improved with a structure in which a vertical line pattern by a specific pixel is not visually recognized.

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

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

An organic light emitting display device according to an embodiment of the present invention includes: a pixel unit including sub-pixels; a scan driver for driving scan lines connected to the sub-pixels on a line-by-line basis; a data driver for driving data lines positioned in a direction crossing the scan lines; a data processing unit configured to generate second data using first data supplied from the outside; The data processing unit generates the second data by changing the grayscale of the first data supplied to sub-pixels 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 grayscale of the first data to be lowered. The dimming unit generates the second data by changing the first data supplied to sub-pixels located at the outermost edge of the fourth side of the pixel unit. The pixel unit includes pixel regions, and any one of blue and red sub-pixels and a green sub-pixel are disposed in a diagonal direction in each of the pixel regions. The red and blue sub-pixels are repeatedly disposed in a specific column, and the green sub-pixels are repeatedly disposed in a column adjacent to the specific column.

A method of driving an organic light emitting display device according to an embodiment of the present invention includes detecting a pattern of data corresponding to a position of a panel, and supplying the data to sub-pixels located at an edge of the panel in response to the pattern of data. and generating second data by changing the gradation of the first data to be converted.

Preferably, the panel includes pixel regions, and any one of the blue and red sub-pixels and the green sub-pixel are arranged in a diagonal direction in each of the pixel regions. The red and blue sub-pixels are repeatedly disposed in a specific column of the panel, and the green sub-pixels are repeatedly disposed in a column adjacent to the specific column. A blue sub-pixel, a red sub-pixel, and two green sub-pixels arranged in two pixel areas adjacent to each other constitute a pixel. The second data is generated by lowering a grayscale 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 other lines; generating the second data by changing the grayscale of the first data supplied to all sub-pixels located on the first line when the first line corresponds to the first line; generating the second data by changing the grayscale of the first data supplied to all sub-pixels located in the last line when the last line is the same; and generating the second data by changing the grayscale of the first data supplied to the first sub-pixel and the last sub-pixel when the other lines are applicable.

The generating of the second data corresponding to the first line may include generating the first data supplied to the outermost sub-pixels among the sub-pixels included in the first and last pixels corresponding to the data pattern. generating the second data by changing the gradation; and generating the second data by changing the grayscale of the first data supplied to the outermost sub-pixels among the sub-pixels not included in the first pixel and the last pixel.

In the generating of the second data corresponding to the last line, the gray level of the first data supplied to the outermost sub-pixels among the sub-pixels included in the first and last pixels corresponding to the data pattern generating the second data by changing and generating the second data by changing the grayscale of the first data supplied to the outermost sub-pixels among the sub-pixels not included in the first pixel and the last pixel.

The generating of the second data corresponding to the other lines includes determining whether it is a first sub-pixel or a last sub-pixel, and if it is determined as the first sub-pixel, the first data corresponding to a data pattern generating second data by changing the grayscale of , and generating second data by changing the grayscale of the corresponding first data in response to the data pattern when it is determined as the last sub-pixel. The method further includes determining whether the first sub-pixel and the last sub-pixel are located on odd or even-numbered lines.

According to the organic light emitting display device and the driving method thereof of the present invention, luminance of sub-pixels located at the outermost edge is lowered, and thus green and red colors can be prevented from being recognized as stripes.

1 is a diagram illustrating a pixel arrangement structure of an organic light emitting display device according to an embodiment of the present invention.
2A to 2D are diagrams illustrating data patterns corresponding to panel positions.
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 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, a preferred embodiment in which a person of ordinary skill in the art to which the present invention pertains can easily practice the present invention will be described in detail with reference to the accompanying FIGS. 1 to 6 as follows.

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

Referring to FIG. 1 , in the organic light emitting display device according to an embodiment of the present invention, red (R) and blue (B) sub-pixels are repeatedly arranged in a specific column, and green (G) sub-pixels are repeatedly arranged adjacent to a specific column. is placed as That is, in the present invention, the sub-pixels R, G, and B are arranged in a pen tile shape.

Red (R) and green (G) sub-pixels or blue (B) and green (G) sub-pixels are disposed in each of the pixel regions 100 . In the pixel region 100 , the red (R) and green (G) sub-pixels are positioned in a diagonal direction to each other. In this case, the interval between the red (R) and green (G) sub-pixels can be set to be wide, 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 area 100 are also located in the diagonal direction. Meanwhile, in the organic light emitting display device of the present invention, the sub-pixels R, G, B, and G positioned in two pixel regions 100 adjacent to each other constitute one pixel and are driven.

In addition, in the pixel arrangement 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 and B in consideration of luminous efficiency. In addition, the blue (B) sub-pixel may be formed to have a larger area than the red (R) sub-pixel in response to luminous efficiency. The area of the sub-pixels R, G, and B may be changed into various shapes in consideration of luminous efficiency.

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

For example, as shown in FIG. 2A , when the panel is driven in a normal position, data is supplied in the first pattern (R, G, B, G, ...). And, when the panel is rotated 90 degrees to the left, the data is supplied as a second pattern (G, B, G, R, ...) as shown in FIG. 2B . In addition, when the panel is rotated 90 degrees to the right, data is supplied in a third pattern (B, G, R, G, ...) as shown in FIG. 2C. And, when the panel is inverted vertically, data is supplied in the fourth pattern (G, R, G, B, ...) as shown in FIG. 2D .

However, in the present invention in which sub-pixels are arranged in the form of pen tiles, there is a problem in that a specific color is recognized at the edge.

In fact, when data is input in the first pattern, as shown in FIG. 3A , there is a problem in that pink color is strongly displayed on the upper side and left side, and greenish color appears strongly on the lower side and right side, as shown in FIG. 3A . Similarly, as shown in FIGS. 3B to 3D , even when data is supplied in the second to fourth patterns, there is a problem in that pink and green colors appear strongly at the edges.

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

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

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

In the pixel portion 40 where the scan lines S1 to Sn and the data lines D1 to Dm intersect, the sub-pixels R, G, and B of the present invention are disposed in the structure shown in FIG. 1 .

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

The data driver 20 generates a data signal using the second data data, and supplies the data signal to the data lines D1 to Dm so that the generated data signal is synchronized with the scan signal. Then, the data signal is supplied to the sub-pixels 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 . Also, the timing controller 50 transfers the second data data2 supplied from the data processor 30 to the data driver 20 .

The data processing unit 30 detects a pattern of data (first to fourth patterns), and dims the first data data1 in response to the detected pattern to generate second data data2 . In fact, the data processing unit 30 generates the second data data2 by lowering the grayscale of the first data data1 to be supplied to the outermost sub-pixels of the panel so that a specific color is not observed at the edge of the panel. A detailed operation process for this 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 processing unit 30 according to the embodiment of the present invention includes an SPR unit 32 and a dimming unit 34 .

The sub pixel rendering (SPR) unit 32 refers to an algorithm for improving the readability of characters and the like. The SPR unit 32 is connected to Pentile, and any one of various currently known algorithms may be applied. Additionally, in the present invention, the SPR unit 32 may be omitted.

The dimming unit 34 generates the second data data2 by controlling the grayscale of the first data data1 to be supplied to the sub-pixels located at the outermost edge of the panel in response to the data pattern.

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 shown in FIGS. 3A to 3D , the first data data1 supplied to the first line and the last line must be dimmed in line units to be generated as the second data data2 .

In addition, the dimming unit 34 generates second data data2 by dimming the first data data1 to be supplied to the first and last subpixels positioned in lines other than the first and last lines. That is, the dimming unit 34 generates second data data2 by lowering the grayscale of the first data data1 to be supplied to the sub-pixels R, G, and B located at the edge of the panel, and generates the second data data2. 2 data data2 is supplied to the timing controller 50 .

The operation process will be described in detail. First, the dimming unit 34 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 When it is determined that the data is to be supplied to the first line, the data pattern is checked. (S202) Here, the data pattern is a first pattern, a second pattern, a third pattern, and a fourth pattern as shown in FIGS. 3A to 3D . is divided into

If the data is determined to be 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 a second pattern or a fourth pattern (S206). The first data data1 to be supplied to the sub-pixel R and the blue sub-pixel B are dimmed to generate second data data2. (S214) (R located on the upper/left side of FIG. 3A , B dimming treatment)

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 It is determined whether the pattern is the first pattern or the third pattern (S212). Here, the data corresponds to the red sub-pixel (R), the blue sub-pixel (B), and the green sub-pixel (G2) because the data is determined as the first pattern in step S202. One first data data1 is dimmed. (R, B, and G dimming processing located on the upper side/right side of FIG. 3A ) Here, the green sub-pixel denoted as G2 is the same pixel as the blue sub-pixel (B). It means that it is located in the area 100 . In addition, for convenience of description, the green sub-pixel located in the same pixel region 100 as the red sub-pixel R will be denoted as G1. Meanwhile, when it is not determined as the last pixel in step S210 , that is, pixels positioned between the first pixel and the last pixel are dimmed to correspond to the red sub-pixel R and the blue sub-pixel B ( S214 ). As described above, when the data of the first pattern is input, the first data data1 corresponding to the sub-pixels located at the upper edge are dimmed through steps S202 to S214, and the second data data2 is is created

If the data is determined to be 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 a second pattern or a fourth pattern (S206). The 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 second pixel (S208). ) (R, B, G dimming process located on the upper/left side of FIG. 3B)

If the first data data1 does not correspond to the first pixel in step S204, it is determined whether or not the first data data1 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 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 sub-pixel R and the blue sub-pixel B (S214) (R, B dimming processing located on the upper side/right side of FIG. 3B) On the other hand, when it is not determined as the last pixel in step S210, that is, pixels located between the first pixel and the last pixel In this case, the dimming process is performed corresponding to the red sub-pixel (R) and the blue sub-pixel (B). (S214) As described above, when the data of the second pattern is input, it is located at the upper edge through steps S202 to S214. The first data data1 corresponding to the sub-pixels are 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 a first pattern or a third pattern (S306). The first data data1 to be supplied to the green sub-pixels G1 and G2 and the blue sub-pixel B included in the second pixel are dimmed to generate second data data2. (S308) (FIG. 3C) B, G, G dimming treatment located on the upper/left side of

If the first data data1 does not correspond to the first pixel in step S304, it is determined whether or not the first data is input to the last pixel. (S310) If it is determined in step S310 that the first data data1 is supplied to the last pixel, the data is It is determined whether the pattern is the second pattern or the fourth pattern (S312). Here, since the data is determined as the third pattern in step S202, the first data data1 corresponding to the green sub-pixels G1 and G2 are dimmed. .(S314) (G, G dimming processing located on the upper side/right side of FIG. 3C) On the other hand, when 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, the green sub-pixel Dimming is performed corresponding to the G1 and G2. (S314) As described above, when the data of the third pattern is input, the sub-pixels located at the upper edge are applied through steps S202, S304 to S314. The corresponding first data data1 is dimmed to generate second data data2.

If the data is determined to be the fourth 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 a first pattern or a third pattern (S306). The first data data1 to be supplied to the green sub-pixels G1 and G2 included in the second pixel is dimmed to generate the second data data2 ( S314 ) (located on the upper/left side of FIG. 3D ). G, G dimming treatment)

If the first data data1 does not correspond to the first pixel in step S304, it is determined whether or not the first data is input to the last pixel. (S310) If it is determined in step S310 that the first data data1 is supplied to the last pixel, the data is It is determined whether the pattern is the second pattern or the fourth pattern (S312). Here, since the data is determined as the fourth pattern in step S202, the green sub-pixels G1 and G2 and the blue sub-pixel B included in the last pixel are used. The first data data1 to be supplied is dimmed to generate second data data2. (S308) (G, G, B dimming processing located on the upper/right side of FIG. 3D) Meanwhile, in step S310, the last pixel If it is not determined as , that is, pixels located between the first pixel and the last pixel, the dimming process is performed corresponding to the green sub-pixels G1 and G2 (S314). As described above, the data of the fourth pattern is In the case of input, the first data data1 corresponding to the sub-pixels positioned at the upper edge are dimmed through steps S202, S304 to S314, and the second data data2 is generated.

Meanwhile, if it is not determined in step S200 that the data to be supplied to the first line is data to be supplied to the last line, it is determined whether the data is to be supplied to the last line (S300). In step S300, it is determined that the first data data1 is data to be supplied to the last line. If it is, the data pattern is checked. (S302)

If the data is determined to be 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 first data data1 is the first pattern or the third pattern, it is determined whether the first data data1 is the first pattern or the third pattern ( S306 ). The second data data2 is generated by dimming the first data data1 to be supplied to the pixels G1 and G2 and the blue sub-pixel B (S308) (located on the lower side/left side of FIG. 3A ). B, G, G dimming treatment)

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). Here, the data is the first pattern in step S302. Since it is determined as , the first data data1 to be supplied to the green sub-pixels G1 and G2 included in the last pixel is dimmed to generate second data data2. (S314) (bottom/ G and G dimming processing located on the right) Meanwhile, when it is not determined as the last pixel in step S310, that is, pixels located between the first pixel and the last pixel are dimmed corresponding to the green sub-pixels G1 and G2. (S314) As described above, when the data of the first pattern is input, the first data (data1) corresponding to the sub-pixels located at the lower edge are dimmed through steps S302 to S314, and the 2 data (data2) is generated.

If the data is determined to be 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 first data data1 is the first pattern or the third pattern, it is determined whether the first data data1 is the first pattern or the third pattern ( S306 ). The first data data1 to be supplied to the pixels G1 and G2 is dimmed to generate second data data2. (S314) (G and G dimming processing located on the lower side/left side of FIG. 3B)

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). Here, the data is the second pattern in step S302. Since it is determined as , the first data data1 to be supplied to the green subpixels G1 and G2 and the blue subpixel B included in the last pixel are dimmed to generate second data data2. (S308) ) (G, G, B dimming processing located on the lower side/right side of FIG. 3B ) Meanwhile, when 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-pixels Dimming is performed corresponding to (G1, G2). (S314) As described above, when the data of the second pattern is input, the first corresponding to the sub-pixels located at the lower edge goes through steps S302 to S314. The data data1 is dimmed to generate the second data data2.

If the data is determined to be the third 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 When it is determined that the first data data1 is the second pattern or the fourth pattern, it is determined whether the first data data1 is the second pattern or the fourth pattern ( S206 ). The second data data2 is generated by dimming the first data data1 to be supplied to the pixel R and the blue sub-pixel B (S214) (R, B located on the lower side/left side of FIG. 3C ) dimming treatment)

When 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 a first pattern or a third pattern (S212). , 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 to generate the second data data2. (S208) (R, B, G dimming processing located on the lower side/right side of FIG. 3C) 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 Dimming is performed corresponding to the red sub-pixel (R) and the blue sub-pixel (B). (S214) As described above, when the data of the third pattern is input, the lower edge goes through steps S302, S204 to S214. The first data data1 corresponding to the sub-pixels located in ? are dimmed to generate second data data2.

When it is determined in step S302 that the data is the fourth pattern, 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 first data data1 is the second pattern or the fourth pattern ( S206 ). The first data data1 to be supplied to the pixel R, the blue subpixel B, and the green subpixel G2 are dimmed to generate the second data data2. (S208) (bottom/ G, B, R dimming located on the left)

When 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). Here, the data is the fourth pattern in step S302. , the first data data1 to be supplied to the red sub-pixel R and the blue sub-pixel B included in the last pixel are dimmed to generate second data data2. (S214) (Fig. 3d (R and B dimming processing located on the lower side/right side) Meanwhile, in the case where 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 sub-pixel (R) and the blue sub-pixel (R) Dimming is performed corresponding to the pixel B. (S214) As described above, when the data of the fourth pattern is input, the data corresponding to the sub-pixels located at the lower edge is performed through steps S302, S204 to S214. The first data data1 is dimmed to generate the second data data2.

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

If the first pattern or the second pattern is determined in step S400, it is determined whether the first data data1 is supplied to the first sub-pixel or the last sub-pixel (S402, S411).

When it is determined in step S402 that the first data data1 corresponding to the first sub-pixel is the first pattern, it is determined whether the pattern is the first pattern (S404). (S406) If it is determined in step S406 that the first data data1 is supplied to the odd-numbered line, it is determined as the first data data1 supplied to the red sub-pixel R and dimming is performed. (S408) If it is determined in step S406 that the first data data1 is not supplied to the odd-numbered line, it is determined as the first data data1 supplied to the blue sub-pixel B and dimming is performed (S410).

If the first pattern is not determined in step S404, it is determined whether the first data data1 is supplied to the odd line. (S414) If it is determined in step S414 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 G2 is dimmed. (S416) When it is determined in step S414 that the first data data1 is not supplied to the odd-numbered line, the green sub-pixel G1 is supplied. It is determined as the first data (data1) to be dimmed. (S418)

If it is determined in step S411 that the first data data1 corresponding to the last sub-pixel is the first pattern, it is determined whether the first pattern is (S412). (S414) If it is determined in step S414 that the first data data1 is supplied to the odd-numbered line, it is determined as the first data data1 supplied to the green sub-pixel G2 and dimmed. ( S416) When it is determined in step S414 that the first data data1 is not supplied to the odd-numbered line, it is determined as the first data data1 supplied to the green sub-pixel G1 and dimming is performed (S418).

If it is not determined as the first pattern in step S412, 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 It is determined that the first data data1 supplied to the pixel R is dimmed. (S408) If it is determined in step S406 that the first data data1 is not supplied to the odd-numbered line, the blue sub-pixel B is supplied. It is determined as the first data (data1) to be dimmed. (S410)

In fact, in the present invention, when data is input in the first pattern or the second pattern, S400 for sub-pixels located at the edges of the remaining lines except for the first and last lines, that is, the first and last sub-pixels. Dimming is performed using steps S418 to S418.

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

If it is determined in step S421 that the first data data1 corresponding to the first sub-pixel is the third pattern, it is determined whether it is a third pattern. (S420) If the third pattern is determined in step S420, the first data data1 is an odd line (S422) If it is determined in step S422 that the first data data1 is supplied to the odd-numbered line, it is determined as the first data data1 supplied to the blue sub-pixel B and dimming is performed. (S410) If it is determined in step S422 that the first data data1 is not supplied to the odd line, it is determined as the first data data1 supplied to the red sub-pixel R and dimming is performed (S408).

If the third pattern is not determined in step S420, 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) When it is determined in step S424 that the first data data1 is not supplied to the odd line, the green sub-pixel G2 is supplied. It is determined as the first data (data1) to be dimmed. (S416)

If it is determined in step S425 as the first data data1 corresponding to the last sub-pixel, it is determined whether it is a third pattern. (S426) If it is determined as the third pattern in step S426, the first data data1 is an odd line (S424) If it is determined in step S424 that the first data data1 is supplied to the odd-numbered line, it is determined as the first data data1 supplied to the green sub-pixel G1 and is dimmed. ( S418) When it is determined in step S424 that the first data data1 is not supplied to the odd-numbered line, it is determined as the first data data1 supplied to the green sub-pixel G2 and dimming is performed (S416).

If the third pattern is not determined in step S426, 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) When it is determined in step S422 that the first data data1 is not supplied to the odd-numbered line, the red sub-pixel R is supplied. It is determined as the first data (data1) to be dimmed. (S408)

In fact, in the present invention, when data is input in the third or fourth pattern, sub-pixels located at the edges of the remaining lines except for the first and last lines, that is, the first sub-pixel and the last sub-pixel are described in detail. Dimming by repeating one process.

As described above, the dimming unit 34 of the present invention dims the sub-pixels located at the edge of the panel in response to the first, second, third, and fourth patterns of data while driving as shown in FIG. 6 . do. Here, the dimming value corresponding to each sub-pixel (R, B, G1, G2) is experimentally determined in consideration of the panel resolution, inch, luminous efficiency, and the like. For example, in a specific panel, the second data data2 may be generated by performing a dimming process such that the luminance is reduced to 1/2 corresponding to the red sub-pixel R and the blue sub-pixel B. In addition, the second data data2 may be generated by performing a dimming process such that the luminance of the green sub-pixel G1 is 3/5 and the green sub-pixel G2 is 4/7.

That is, the dimming unit 34 of the present invention can sense the red sub-pixel (R), the blue sub-pixel (B), and the green sub-pixels (G1, G2) positioned at the edge of the panel while being driven as shown in FIG. 5 . , there is an advantage that various dimming processing is possible in response to this.

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

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

Claims (19)

Nth (N is a natural number) to N+3th pixel rows sequentially arranged in the first direction;
Nth to N+3th pixel columns sequentially arranged in a second direction intersecting the first direction;
first color sub-pixels and second color sub-pixels alternately arranged in each of the Nth pixel row, the N+2th pixel row, the Nth pixel column, and the N+2th pixel column; and
third color sub-pixels arranged in the N+1th pixel row, the N+3th pixel row, the N+1th pixel column, and the N+3th pixel column;
Each of the third color sub-pixels has a shape extending in a direction inclined with respect to the first direction and the second direction when viewed in a plan view. According to claim 1,
The first color sub-pixels include two first color sub-pixels disposed at an intersection of the N-th pixel row and the N-th pixel column, and at an intersection of the N+2th pixel row and the N+2th pixel column, respectively. including pixels;
The second color sub-pixels include two second color sub-pixels disposed at an intersection of the N-th pixel row and the N+2th pixel column and at an intersection of the N+2th pixel row and the N-th pixel column, respectively. An organic light emitting display panel comprising pixels. According to claim 1,
The third color sub-pixels are
a first third color sub-pixel disposed at an intersection of the N+1th pixel row and the N+1th pixel column;
a second third color sub-pixel disposed at an intersection of the N+1th pixel row and the N+3th pixel column;
a third third color sub-pixel disposed at an intersection of the N+3th pixel row and the N+1th pixel column; and
and a fourth third color sub-pixel disposed at an intersection of the N+3th pixel row and the N+3th pixel column. 4. The method of claim 3,
and the first third color sub-pixel and the second third color sub-pixel have symmetrical shapes. 4. The method of claim 3,
The first third color sub-pixel and the third third color sub-pixel have symmetrical shapes. 4. The method of claim 3,
and the first third color sub-pixel and the fourth third color sub-pixel have symmetrical shapes. According to claim 1,
Each of the third color sub-pixels has an asymmetric shape with respect to at least one of the first direction and the second direction. According to claim 1,
and a size of any one of the third color sub-pixels is smaller than a size of any one of the first color sub-pixels and the second color sub-pixels. According to claim 1,
the Nth pixel row, the N+2th pixel row, the Nth pixel column, and the N+2th pixel column include only the first color sub-pixels and the second color sub-pixels;
and the N+1th pixel row, the N+3th pixel row, the N+1th pixel column, and the N+3th pixel column include only the third color sub-pixels. . According to claim 1,
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. Nth (N is a natural number) to N+3th pixel rows sequentially arranged in the first direction, Nth to N+3th pixel columns sequentially arranged in a second direction intersecting the first direction; first color sub-pixels and second color sub-pixels alternately arranged in each of the Nth pixel row, the N+2th pixel row, the Nth pixel column, and the N+2th pixel column, and the a display panel including third color sub-pixels arranged in an N+1th pixel row, the N+3th pixel row, the N+1th pixel column, and the N+3th pixel column;
a scan driver configured to drive scan lines connected to the first color sub-pixels, the second color sub-pixels, and the third color sub-pixels;
a data processing unit configured to receive first data and generate second data based on the first data; and
and a data driver connected to the first color sub-pixels, the second color sub-pixels, and the third color sub-pixels, and configured to drive data lines corresponding to the first data or the second data; ,
The data processing unit may change a grayscale of first data corresponding to sub-pixels positioned at an edge of the display panel among the first color sub-pixels, the second color sub-pixels, and the third color sub-pixels and a dimming unit to generate the second data. 12. The method of claim 11,
The dimming unit generates the second data by lowering a grayscale of the first data. 13. The method of claim 12,
The dimming unit may include first data corresponding to the sub-pixels positioned in the first pixel row and the last pixel row, and first data corresponding to the first sub-pixel and the last sub-pixel among the sub-pixels positioned in the other pixel rows. and generating the second data by lowering a grayscale of data. 12. The method of claim 11,
A size of any one of the third color sub-pixels is smaller than a size of any one of the first color sub-pixels and the second color sub-pixels. 12. The method of claim 11,
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. 12. The method of claim 11,
The display panel operates in a plurality of positions,
Each of the plurality of positions has a sub-pixel color pattern based on an arrangement of the first color sub-pixels, the second color sub-pixels, and the third color sub-pixels. 17. The method of claim 16,
and the first data is supplied according to a sub-pixel color pattern corresponding to each position of the display panel. 18. The method of claim 17,
The data processing unit detects a pattern of the first data, and performs a dimming process on the first data based on the sensed pattern of the first data. 12. The method of claim 11,
Each of the third color sub-pixels has a shape extending in a direction inclined with respect to the first direction and the second direction when viewed in a plan view.

Images