Display device

• US 8,089,432 B2
• Filed: 04/26/2006
• Issued: 01/03/2012
• Est. Priority Date: 07/29/2005
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Itoh, Ryoki, Hisada, Yuhko
• Primary Examiner(s): Eisen, Alexander
• Assistant Examiner(s): PHAM, VIET DAVID
• Application Number:
  US11/994,657
• Publication Number:
  US 20090225015A1
• Time in Patent Office: 2,078 Days
• Field of Search: 345 76-100, 345/690
• US Class Current: 345/84
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• 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 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2340/06 Colour space transformation
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/351 comprising more than three subpixels, e.g. red-green-blue-white [RGBW]

Abstract

A display device that can prevent linear unevenness (uneven line) generated in one direction of a display image and can provide excellent display qualities includes a pixel including sub-pixels of n-colors (where n is an integer of 4 or more), and a signal line arranged to drive sub-pixels, the pixel and the signal line arranged to drive sub-pixels being disposed in a display region. The signal line arranged to drive sub-pixels is disposed on a display region center side of a sub-pixel positioned at least one terminal of the display region. The signal line arranged to drive sub-pixels is not disposed on a non-display region side of the sub-pixel positioned at the at least one terminal. The sub-pixel positioned at the at least one terminal has a color other than a color with the highest luminance of the n-colors.

Claims

1. A display device comprising:

a plurality of pixels, each including an array of a plurality of sub-pixels of n-colors where n is an integer equal to at least 4; and

a plurality of signal lines arranged to drive the plurality of sub-pixels;

wherein

the plurality of pixels and the plurality of signal lines are arranged in a display region of the display device;

one of the plurality of the signal lines arranged to drive a first one of the plurality of sub-pixels that is disposed at a first lateral end of the display region is arranged on a side of the first one of the plurality of sub-pixels, the side of the first one of the plurality of sub-pixels being positioned furthest from a non-display region of the display device;

none of the plurality of signal lines are arranged on another side of the first one of the plurality of sub-pixels that is positioned closest to the non-display region of the display device;

a color of the first one of the plurality of sub-pixels is a color with the lowest luminance of the n-colors;

the first one of the plurality of sub-pixels is disposed at a first lateral end of each of the plurality of pixels and a second one of the plurality of sub-pixels having a color with the highest luminance of the n-colors is disposed at a second lateral end of each of the plurality of pixels such that the remaining ones of the plurality of sub-pixels are provided between the first one of the plurality of sub-pixels and the second one of the plurality of sub-pixels; and

the array of the plurality of sub-pixels in a first one of the plurality of pixels that is arranged at the first lateral end of the display region has same arrangement of sub-pixels as a second one of the plurality of pixels that is arranged at a second lateral end of the display region.

2. The display device according to claim 1, wherein the second one of the plurality of sub-pixels is not adjacent to a sub-pixel having a color with the second-highest luminance of the n-colors.

3. The display device according to claim 1, wherein each of the plurality of pixels includes sub-pixels of four colors, and the sub-pixels are arrayed in order of the highest-luminance color, the third-highest-luminance color, the second-highest-luminance color, the lowest-luminance color.

4. The display device according to claim 1, wherein each of the plurality of pixels includes sub-pixels of four colors and the sub-pixels are arrayed in order of white, red, green, blue.

5. The display device according to claim 1, wherein each of the plurality of pixels includes sub-pixels of five colors, and the sub-pixels are arrayed:

in order of the highest-luminance color, the fourth-highest-luminance color, the third-highest-luminance color, the second-highest-luminance color, the lowest-luminance color;

or

in order of the highest-luminance color, the third-highest-luminance color, the fourth-highest-luminance color, the second-highest-luminance color, the lowest-luminance color.

6. The display device according to claim 1, wherein each of the plurality of pixels includes sub-pixels of six colors, and the sub-pixels are arrayed:

in order of the highest-luminance color, the fifth-highest-luminance color, the third-highest-luminance color, the fourth-highest-luminance color, the second-highest-luminance color, the lowest-luminance color;

in order of the highest-luminance color, the fourth-highest-luminance color, the fifth-highest-luminance color, the second-highest-luminance color, the third-highest-luminance color, the lowest-luminance color;

in order of the highest-luminance color, the fourth-highest-luminance color, the second-highest-luminance color, the fifth-highest-luminance color, the third-highest luminance color, the lowest-luminance color;

or

in order of the highest-luminance color, the third-highest-luminance color, the fifth-highest-luminance color, the second-highest-luminance color, the fourth-highest-luminance color, the lowest-luminance color.

7. The display device according to claim 1, wherein the display device includes a dummy signal line arranged on the another side of the first one of the plurality of sub-pixels of the first one of the plurality of pixels that is positioned closest to the non-display region.

8. The display device according to claim 7, wherein the display device includes a dummy sub-pixel in the non-display region;

and

the dummy sub-pixel is adjacent to the first one of the plurality of sub-pixels of the first one of the plurality of pixels that is disposed at the first lateral end of the display region.

9. The display device according to claim 1, wherein the plurality of sub-pixels in each of the plurality of pixels is arrayed in accordance with a stripe array.

10. The display device according to claim 1, wherein the display device is a liquid crystal display device and includes color filters.

11. The display device according to claim 10, wherein the color filters have substantially the same film thickness and are disposed in the plurality of sub-pixels, respectively.

12. The display device according to claim 1, wherein the n-colors include red, green, blue, and yellow.

13. The display device according to claim 12, wherein the second one of the plurality of sub-pixels is not adjacent to a sub-pixel having a color with the second-highest luminance of the n-colors.

14. The display device according to claim 12, wherein each of the plurality of pixels includes sub-pixels of four colors, and the sub-pixels are arrayed in order of the highest-luminance color, the third-highest-luminance color, the second-highest-luminance color, the lowest-luminance color.

15. The display device according to claim 12, wherein each of the plurality of pixels includes sub-pixels of four colors, and the sub-pixels are arrayed in order of yellow, red, green, blue.

16. The display device according to claim 12, wherein the display device includes a dummy signal line arranged on the another side of the first one of the plurality of sub-pixels of the first one of the plurality of pixels that is positioned closest to the non-display region.

17. The display device according to claim 16, wherein the display device includes a dummy sub-pixel in the non-display region;

and

the dummy sub-pixel is adjacent to the first one of the plurality of sub-pixels of the first one of the plurality of pixels that is disposed at the first lateral end of the display region.

18. The display device according to claim 12, wherein the plurality of sub-pixels in each of the plurality of pixels is arrayed in accordance with a stripe array.

19. The display device according to claim 12, wherein the display device is a liquid crystal display device and includes color filters.

20. The display device according to claim 19, wherein the color filters have substantially the same film thickness and are disposed in the plurality of sub-pixels, respectively.