Display substrate and display apparatus having the same

• US 20080231779A1
• Filed: 02/20/2008
• Published: 09/25/2008
• Est. Priority Date: 03/23/2007
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Shi-Yul, Kim, Jang-Soo, Shin, Kyoung-Ju
• Application Number:
  US12/070,919
• Publication Number:
  US 20080231779A1
• Time in Patent Office: Days
• US Class Current: 349/106
• CPC Class Codes: G02F 1/136213 Storage capacitors associated with the pixel electrode
• CPC Class Codes: G02F 1/136222 Colour filters incorporated in the active matrix substrate
• CPC Class Codes: G02F 2203/30 Gray scale
• CPC Class Codes: G09G 2320/0242 Compensation of deficiencies in the appearance of colours

Abstract

A display substrate includes a pixel layer, a color filter layer and a pixel electrode. The pixel layer includes a first storage electrode, a second storage electrode and a third storage electrode respectively associated with a red pixel, a green pixel and a blue pixel. At least one of the first, second and third storage electrodes has a different area from a remainder of the storage electrodes. The color filter layer includes a red color filter, a green color filter and a blue color filter formed on the pixel layer. The red, green and blue color filters respectively correspond to the red pixel, the green pixel and the blue pixel. Pixel electrodes are formed on the color filter layer. The pixel electrodes correspond to the red, green and blue pixels.

Claims

1. A display substrate comprising:

a pixel layer including a first storage electrode, a second storage electrode and a third storage electrode respectively formed in a red pixel region, a green pixel region and a blue pixel region, at least one of the first, second and third storage electrodes having an area different from a remainder of the storage electrodes;

a color filter layer including a red color filter, a green color filter and a blue color filter formed on the pixel layer, the red, green and blue color filters respectively corresponding to the red pixel, the green pixel and the blue pixel; and

a pixel electrode formed on the color filter layer, the pixel electrode corresponding to each of the red, green and blue pixels.

2. The display substrate of claim 1, wherein areas of the first, second and third storage electrodes are defined such that kickback voltages of the red, green and blue pixels are substantially identical.

3. The display substrate of claim 1, wherein a first storage hole, a second storage hole and a third storage hole respectively corresponding to the first, second and third storage electrodes respectively are formed through the red, green and blue color filters.

4. The display substrate of claim 3, wherein areas of the first, second and third storage electrodes and opening areas of the first, second and third storage electrodes are controlled so that kickback voltages of the red, green and blue pixels are substantially identical to one another.

5. The display substrate of claim 1, wherein the pixel layer further comprises:

a gate wire comprising a gate line and a gate electrode connected to the gate line; and

a data wire insulated from the gate wire by a gate insulation layer, the data wire including a data line crossing the gate line, a drain (source) electrode connected to the data line and a source electrode spaced apart from the drain electrode.

6. The display substrate of claim 5, wherein the storage electrode is formed from a same layer as the gate wire.

7. A display substrate comprising:

a pixel layer including a first storage electrode, a second storage electrode and a third storage electrode associated with respectively a red pixel, a green pixel and a blue pixel;

a color filter layer formed on the pixel layer, the color filter layer comprising;

a red color filter having a first storage hole formed through the red color filter and associated with the first storage electrode, a green color filter having a second storage hole, formed through the green color filter and associated with the second storage electrode, and a blue color filter having a third storage hole formed through the blue color filter, and associated with the third storage electrode, wherein each of the first, second and third storage holes has an area associated with the respective storage electrodes and further wherein the area of at least one of the first, second and third storage holes is different than an area of remainder of the storage holes; and

first, second and third pixel electrodes formed on the color filter layer, the first, second and third pixel electrodes being associated with red, green and blue pixels.

8. The display substrate of claim 7, wherein opening areas of the first, second and third storage holes established such that kickback voltages of the red, green and blue pixels are substantially identical to one another.

9. A display substrate comprising:

a pixel layer including a first source electrode, a second source electrode and a third source electrode, which overlap with gate electrodes, respectively formed in a red pixel, a green pixel and a blue pixel, at least one of portions of the first, second and third source electrodes overlapping with the gate electrode having a different area from a remainder of the source electrodes;

a color filter layer including a red color filter, a green color filter and a blue color filter, which respectively correspond to the red, green and blue pixels, formed in the pixel layer; and

first, second and third pixel electrodes formed on the color filter layer, the first, second and third pixel electrodes being associated with red, green and blue pixels.

10. The display substrate of claim 9, wherein areas of the portions of the first, second and third source electrodes overlapping with the gate electrodes are controlled so that kickback voltages of the red, green and blue pixels are substantially identical to one another.

11. The display substrate of claim 10, wherein the pixel layer further comprises a first storage electrode, a second storage electrode and a third storage electrode respectively formed in the red, green and blue pixels, and a first storage hole, a second storage hole and a third storage hole respectively corresponding to the first, second and third storage electrodes are respectively formed through the red, green and blue color filters.

12. A display substrate comprising:

a pixel layer including a first source extension portion, a second source extension portion and a third source extension portion respectively extending from source electrodes respectively formed in a red pixel, a green pixel and a blue pixel, wherein the first, second and third source extension portions overlap a gate line, at least one of the first, second and third source extension portions having an area of a size different from a size of remaining ones of the drain extension portions;

a color filter layer including a red color filter, a green color filter and a blue color filter, which correspond to the red, green and blue pixels, formed on the pixel layer; and

first, second and third pixel electrodes formed on the color filter layer, the first, second and third pixel electrodes being associated with red, green and blue pixels.

13. The display substrate of claim 12, wherein areas of the portions of the first, second and third source extension portions are controlled so that kickback voltages of the red, green and blue pixels are substantially identical to one another.

14. The display substrate of claim 13, wherein the pixel layer further comprises a first storage electrode, a second storage electrode and a third storage electrode respectively formed in the red, green and blue pixels, and a first storage hole, a second storage hole and a third storage hole respectively corresponding to the first, second and third storage electrodes are respectively formed through the red, green and blue color filters.

15. A display apparatus comprising:

a display substrate comprising;

a pixel layer including a first storage electrode, a second storage electrode and a third storage electrode associated with respectively a red pixel, a green pixel and a blue pixel;

a color filter layer including a red color filter having a first storage hole formed therethrough, a green color filter having a second storage hole formed therethrough and a blue color filter having a third storage hole formed therethrough, the first, second and third storage holes respectively corresponding to the first, second and third storage electrodes, at least one of the first, second and third storage electrodes having a different area from a remainder of the storage electrodes or at least one of the first, second and third storage holes having a different area from a remainder of the storage holes; and

a pixel electrode formed on the color filter layer, the pixel electrode corresponding to the red, green and blue pixels;

an opposing substrate opposite to the display substrate, the opposing substrate including a common electrode formed thereon; and

a liquid crystal layer disposed between the display substrate and the opposing substrate.

16. The display apparatus of claim 15, wherein areas of the first, second and third storage electrodes and opening areas of the first, second and third storage holes are controlled so that kickback voltages of the red, green and blue pixels are substantially identical to one another.

17. A display apparatus comprising:

a display substrate comprising;

a pixel layer including a first source electrode, a second source electrode and a third source electrode, which overlap with gate electrodes, respectively formed in a red pixel, a green pixel and a blue pixel, at least one of portions of the first, second and third source electrodes overlapping with the gate electrode having a different area from a remainder of the source electrodes;

a color filter layer including a red color filter, a green color filter and a blue color filter, which respectively correspond to the red, green and blue pixels, formed in the pixel layer; and

first, second and third pixel electrodes formed on the color filter layer, the first, second and third pixel electrodes being associated with red, green and blue pixels;

an opposing substrate opposite to the display substrate, the opposing substrate including a common electrode formed thereon; and

a liquid crystal layer disposed between the display substrate and the opposing substrate.

18. The display apparatus of claim 17, wherein areas of portions of the first, second and third source electrodes overlapping with the gate electrode are controlled so that kickback voltages of the red, green and blue pixels are substantially identical to one another.

19. A display apparatus comprising:

a display substrate comprising;

a pixel layer including a first source extension portion, a second source extension portion and a third source extension portion respectively extending from source electrodes respectively formed in a red pixel, a green pixel and a blue pixel, wherein the first, second and third source extension portions overlap a gate line, at least one of the first, second and third source extension portions having an area of a size different from a size of remaining ones of the source extension portions;

a color filter layer including a red color filter, a green color filter and a blue color filter, which correspond to the red, green and blue pixels, formed on the pixel layer; and

first, second and third pixel electrodes formed on the color filter layer, the first, second and third pixel electrodes being associated with red, green and blue pixels;

an opposing substrate opposite to the display substrate, the opposing substrate including a common electrode formed thereon; and

a liquid crystal layer disposed between the display substrate and the opposing substrate.

20. The display substrate of claim 19, wherein areas of the portions of the first, second and third source extension portions are controlled so that kickback voltages of the red, green and blue pixels are substantially identical to one another.