Organic light emitting diode display and method for driving display panel thereof

• US 9,305,487 B2
• Filed: 11/28/2011
• Issued: 04/05/2016
• Est. Priority Date: 12/06/2010
• Status: Active Grant

• Current Assignee: AUO Corp.
• Original Assignee: AU Optronics Corporation
• Inventors: Yang, Hsueh-Yen, Tsai, Tze-Chien
• Primary Examiner(s): Moon, Seokyun
• Application Number:
  US13/304,694
• Publication Number:
  US 20120139965A1
• Time in Patent Office: 1,590 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2340/0457 Improvement of perceived resolution by subpixel rendering
• CPC Class Codes: G09G 3/3208 organic, e.g. using organic light-emitting diodes [OLED]
• CPC Class Codes: G09G 3/3225 using an active matrix
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers
• CPC Class Codes: G09G 5/026 Control of mixing and/or overlay of colours in general G09G5/022 and G09G5/024 take precedence

Abstract

An OLED display and a method for driving a display panel thereof are provided. The layout area of each pixel of the OLED display panel is specially designed to be a rectangle in shape, and the pixels are driven in such a manner that each two sub-pixels are taken as a unit to be driven. As such, according to the interaction manner among sub-pixels of the pixels, two sub-pixels can be viewed as one pixel to achieve more pixels within 1 inch in comparison with the conventional panels, which enables the current AMOLED driving circuit designs to be used in specific high resolution applications.

Claims

1. An organic light emitting diode display comprising:

an organic light emitting diode display panel comprising a plurality of pixels arranged in array, each pixel comprising a plurality of sub-pixels, wherein each of the sub-pixels is merely used for displaying a single color; and

a driving device coupled to the organic light emitting diode display panel to drive each of the pixels in a manner that at least one sub-pixel adjacent to the pixel and the pixel are driven for color mixing according to data signals of at least one pixel within at most three rows,

wherein the driving device drives the at least one sub-pixel adjacent to the pixel and the pixel for color mixing in response to determining that a luminance difference between the data signals of each of the pixels and the data signals of each of the adjacent pixels is within a predetermined range.

2. The organic light emitting diode display according to claim 1, wherein the sub-pixels include red, green and blue sub-pixels.

3. The organic light emitting diode display according to claim 2, wherein the sub-pixels of the i^th row of pixels of the organic light emitting device display panel are arranged in order of red-green-blue, where i is a positive integer.

4. The organic light emitting diode display according to claim 2, wherein

the sub-pixels of the i^th row of pixels of the organic light emitting device display panel are arranged in order of red-green-blue, where i is an odd positive integer;

and

the sub-pixels of the (i+1)^th row of pixels of the organic light emitting device display panel are arranged in order of blue-green-red.

5. The organic light emitting diode display according to claim 2, wherein

the sub-pixels of the (3i+1)^th row of pixels of the organic light emitting device display panel are arranged in order of red-green-blue, where i is zero or a positive integer;

the sub-pixels of the (3i+2)^th row of pixels of the organic light emitting device display panel are arranged in order of blue-red-green; and

the sub-pixels of the (3i+3)^th row of pixels of the organic light emitting device display panel are arranged in order of green-blue-red.

6. The organic light emitting diode display according to claim 2, wherein

the sub-pixels of the i^th row of pixels of the organic light emitting device display panel are arranged in order of red-green-blue, where i is an odd positive integer;

and

the sub-pixels of the (i+1)^th row of pixels of the organic light emitting device display panel are arranged in order of blue-red-green.

7. The organic light emitting diode display according to claim 1, wherein the sub-pixels include red, green, dark blue and light blue sub-pixels.

8. The organic light emitting diode display according to claim 7, wherein

the sub-pixels of the i^th row of pixels of the organic light emitting device display panel are arranged in order of light blue-red-green-dark blue, where i is an odd positive integer;

and

the sub-pixels of the (i+1)^th row of pixels of the organic light emitting device display panel are arranged in order of green-dark blue-light blue-red.

9. The organic light emitting diode display according to claim 7, wherein

the sub-pixels of the i^th row of pixels of the organic light emitting device display panel are arranged in order of green-red-light blue-dark blue, where i is an odd positive integer;

and

the sub-pixels of the (i+1)^th row of pixels of the organic light emitting device display panel are arranged in order of light blue-dark blue-green-red.

10. The organic light emitting diode display according to claim 1, wherein the sub-pixels include red, first green, second green, and blue sub-pixels.

11. The organic light emitting diode display according to claim 10, wherein

the sub-pixels of the i^th row of pixels of the organic light emitting device display panel are arranged in order of first green-red-second green-blue, where i is an odd positive integer, the red sub-pixel is L-shaped which partly encloses the first green sub-pixel, and the blue sub-pixel is L-shaped which partly encloses the second green sub-pixel;

and

the sub-pixels of the (i+1)^th row of pixels of the organic light emitting device display panel are arranged in order of first green-blue-second green-red, the blue sub-pixel is L-shaped which partly encloses the first green sub-pixel, and the red sub-pixel is L-shaped which partly encloses the second green sub-pixel.

12. The organic light emitting diode display according to claim 1, wherein each 3*3 pixel array of the pixels are taken as a unit, and the driving device drives the at least one sub-pixel adjacent to the pixel and the pixel for color mixing according to a relationship between the data signals of a center pixel of each 3*3 pixel array and the data signals of the adjacent pixels of each 3*3 pixel array around the center pixel.

13. The organic light emitting diode display according to claim 12, wherein when the relationship comprises that the center pixel and a left upper pixel have connection, or the center pixel and a left pixel have connection, or the center pixel and a left lower pixel have connection, and the center pixel has no connection with the remaining pixels, then the driving device correspondingly drives two sub-pixel of the center (x, y) pixel and one sub-pixel of the (x+1, y) pixel adjacent the (x, y) pixel for color mixing, where x represents a position in row, y represents a position in column, wherein the connection means that the luminance of the data signals of each of the pixels and the data signals of each of the adjacent pixels has the similarity when the luminance difference between the data signals of each of the pixels and the data signals of each of the adjacent pixels is within the predetermined range.

14. The organic light emitting diode display according to claim 12, wherein when the relationship comprises that the center pixel and a right lower pixel have connection, or the center pixel and a right pixel have connection, or the center pixel and a right upper pixel have connection, and the center pixel has no connection with the remaining pixels, then the driving device correspondingly drives two sub-pixels of the center (x, y) pixel and one sub-pixel of the (x−

1, y) pixel adjacent the (x, y) pixel for color mixing, where x represents a position in row, y represents a position in column, wherein the connection means that the luminance of the data signals of each of the pixels and the data signals of each of the adjacent pixels has the similarity when the luminance difference between the data signals of each of the pixels and the data signals of each of the adjacent pixels is within the predetermined range.

15. The organic light emitting diode display according to claim 12, wherein when the relationship comprises that the center pixel has connection with both left upper and right lower pixels, or the center pixel has connection with both right upper and left lower pixels, or the center pixel has connection with both right and left pixels, or the center pixel has connection with both upper and lower pixels, and the center pixel has no connection with the remaining pixels, then the driving device correspondingly drives two sub-pixels of the center (x, y) pixel without combining with sub-pixel of the adjacent pixel for color mixing, where x represents a position in row, y represents a position in column, wherein the connection means that the luminance of the data signals of each of the pixels and the data signals of each of the adjacent pixels has the similarity when the luminance difference between the data signals of each of the pixels and the data signals of each of the adjacent pixels is within the predeteimined range.

16. The organic light emitting diode display according to claim 12, wherein when the relationship comprises that the center pixel has no connection with any adjacent pixel around thereof, then the driving device correspondingly drives two sub-pixels of the center (x, y) pixel, one sub-pixel of the (x+1, y) pixel adjacent the (x, y) pixel, and one sub-pixel of the (x−

1, y) pixel adjacent the (x, y) pixel for color mixing, where x represents a position in row, y represents a position in column, wherein the connection means that the luminance of the data signals of each of the pixels and the data signals of each of the adjacent pixels has the similarity when the luminance difference between the data signals of each of the pixels and the data signals of each of the adjacent pixels is within the predetermined range.

17. A driving method for an organic light emitting diode display panel, wherein the organic light emitting diode display panel comprises a plurality of pixels arranged in array, each pixel comprises a plurality of sub-pixels, each of the sub-pixels is merely used for displaying a single color, and the driving method comprises:

performing an analysis of point, line and plane on each 3*3 pixel array according to data signals of at least one pixel within at most three rows of each 3*3 pixel array; and

driving each of the pixels of the organic light emitting diode display panel in a manner that at least one sub-pixel adjacent to the pixel and the pixel are driven for color mixing in response to determining that a luminance difference between the data signals of a center pixel of each 3*3 pixel array and the data signals of a plurality of adjacent pixels of each 3*3 pixel array around the center pixel is within a predetermined range.

18. The driving method according to claim 17, wherein when a relationship between the data signals of the center pixel of each 3*3 pixel array and the data signals of the adjacent pixels of each 3*3 pixel array around the center pixel comprises that the center pixel and a left upper pixel have connection, or the center pixel and a left pixel have connection, or the center pixel and a left lower pixel have connection, and the center pixel has no connection with the remaining pixels, then the driving device correspondingly drives two sub-pixel of the center (x, y) pixel and one sub-pixel of the (x+1, y) pixel adjacent the (x, y) pixel for color mixing, where x represents a position in row, y represents a position in column, wherein the connection means that the luminance of the data signals of each of the pixels and the data signals of each of the adjacent pixels has the similarity when the luminance difference between the data signals of each of the pixels and the data signals of each of the adjacent pixels is within the predetermined range.

19. The driving method according to claim 17, wherein when a relationship between the data signals of the center pixel of each 3*3 pixel array and the data signals of the adjacent pixels of each 3*3 pixel array around the center pixel comprises that the center pixel and a right lower pixel have connection, or the center pixel and a right pixel have connection, or the center pixel and a right upper pixel have connection, and the center pixel has no connection with the remaining pixels, then the driving device correspondingly drives two sub-pixels of the center (x, y) pixel and one sub-pixel of the (x−

1, y) pixel adjacent the (x, y) pixel for color mixing, where x represents a position in row, y represents a position in column, wherein the connection means that the luminance of the data signals of each of the pixels and the data signals of each of the adjacent pixels has the similarity when the luminance difference between the data signals of each of the pixels and the data signals of each of the adjacent pixels is within the predetermined range.

20. The driving method according to claim 17, wherein when a relationship between the data signals of the center pixel of each 3*3 pixel array and the data signals of the adjacent pixels of each 3*3 pixel array around the center pixel comprises that the center pixel has connection with both left upper and right lower pixels, or the center pixel has connection with both right upper and left lower pixels, or the center pixel has connection with both right and left pixels, or the center pixel has connection with both upper and lower pixels, and the center pixel has no connection with the remaining pixels, then the driving device correspondingly drives two sub-pixels of the center (x, y) pixel without combining with sub-pixel of the adjacent pixel for color mixing, where x represents a position in row, y represents a position in column, wherein the connection means that the luminance of the data signals of each of the pixels and the data signals of each of the adjacent pixels has the similarity when the luminance difference between the data signals of each of the pixels and the data signals of each of the adjacent pixels is within the predetermined range.

21. The driving method according to claim 17, wherein when a relationship between the data signals of the center pixel of each 3*3 pixel array and the data signals of the adjacent pixels of each 3*3 pixel array around the center pixel comprises that the center pixel has no connection with any pixel around thereof, then the driving device correspondingly drives two sub-pixels of the center (x, y) pixel, one sub-pixel of the (x+1, y) pixel adjacent the (x, y) pixel, and one sub-pixel of the (x−

1, y) pixel adjacent the (x, y) pixel for color mixing, where x represents a position in row, y represents a position in column, wherein the connection means that the luminance of the data signals of each of the pixels and the data signals of each of the adjacent pixels has the similarity when the luminance difference between the data signals of each of the pixels and the data signals of each of the adjacent pixels is within the predetermined range.