Display apparatus with color pixels

• US 7,781,784 B2
• Filed: 05/07/2008
• Issued: 08/24/2010
• Est. Priority Date: 05/07/2007
• Status: Expired due to Fees

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Roh, Nam-Seok, Lee, Jeong-Kuk, Lee, Son-Uk, Kim, Sang-Il
• Primary Examiner(s): Soward; Ida M
• Application Number:
  US12/116,312
• Publication Number:
  US 20080277664A1
• Time in Patent Office: 839 Days
• Field of Search: 257/59, 257/72, 257/222, 257/258, 257/291, 257/E31.001, 257/E33.001, 257 89- 90, 257/440
• US Class Current: 257/89
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/167 by electrophoresis
• CPC Class Codes: G02F 1/1677 Structural association of cells with optical devices, e.g. reflectors or illuminating devices
• CPC Class Codes: G02F 2201/52 RGB geometrical arrangements

Abstract

A display apparatus includes pixel electrodes disposed on a first base substrate, a second base substrate which faces the first base substrate, color pixels disposed on the second base substrate, the color pixels correspond to the pixel electrodes in a one-to-one correspondence, each color pixel partially covers the corresponding pixel electrode, a common electrode disposed on the second base substrate to cover the pixel electrodes and an electrophoretic layer including a plurality of electrophoretic particles, the electrophoretic layer being interposed between the pixel electrodes and the common electrode.

Claims

1. A display apparatus comprising:

a first base substrate;

pixel electrodes disposed on the first base substrate;

a second base substrate which faces the first base substrate;

color pixels disposed on the second base substrate;

a common electrode disposed on the second base substrate to cover the color pixels; and

an electrophoretic layer including a plurality of electrophoretic particles, the electrophoretic layer being interposed between the pixel electrodes and the common electrode,

wherein each of the color pixels comprises one of a red pixel, a green pixel and a blue pixel, and the red pixel, the green pixel, and the blue pixel have different area sizes and are spaced apart from one another at the different distances.

2. The display apparatus as claimed in claim 1, wherein the red pixel, the green pixel, and the blue pixel have different widths when viewed from a cross-sectional view.

3. The display apparatus as claimed in claim 1, wherein the color pixels correspond to the pixel electrodes in a one-to-one correspondence and each color pixel partially covers the corresponding pixel electrode.

4. The display apparatus as claimed in claim 1, wherein the red, green and blue pixels have a same thickness.

5. The display apparatus as claimed in claim 4, wherein the green pixel has a smaller area than an area of each of the red and blue pixels, and the blue pixel has a larger area than an area of each of the red and green pixels.

6. The display apparatus as claimed in claim 5, wherein first, second and third holes are respectively formed in the red, green and blue pixels.

7. The display apparatus as claimed in claim 6, wherein sizes of the first to third holes are inversely proportional to the areas of the color pixel.

8. The display apparatus as claimed in claim 7, wherein the red, green and blue pixels intersect centers of the corresponding pixel electrodes and the red, green and blue pixels are spaced apart from one another.

9. The display apparatus as claimed in claim 5, wherein each color pixel includes a smaller cross-sectional width than the corresponding pixel electrode.

10. The display apparatus as claimed in claim 9, wherein the plurality of electrophoretic particles comprise a plurality of black particles and a plurality of white particles having a different polarity than a polarity of the plurality of black particles.

11. The display apparatus as claimed in claim 10, wherein each of the color pixels is positioned within an area of a corresponding pixel electrode when viewed from a plan view.

12. The display apparatus as claimed in claim 11, wherein each of the color pixels is positioned at a central portion of the area of the corresponding pixel electrode.

13. A display apparatus comprising:

a first base substrate;

pixel electrodes disposed on the first base substrate;

a second base substrate which faces the first base substrate;

a plurality of color pixels disposed on the second base substrate; and

a common electrode disposed on the second base substrate to cover the color pixels,

wherein each of the color pixels comprises one of a red pixel, a green pixel and a blue pixel, and the red pixel, the green pixel, and the blue pixel have different area sizes and are spaced apart from one another at the different distances.

14. The display apparatus as claimed in claim 13, wherein the red pixel, the green pixel, and the blue pixel have different widths when viewed from a cross-sectional view.

15. The display apparatus as claimed in claim 13, wherein the color pixels correspond to the pixel electrodes in a one-to-one correspondence and each color pixel partially covers the corresponding pixel electrode.

16. The display apparatus as claimed in claim 13, wherein a region between two adjacent color pixels is opened so as to expose the second base substrate.

17. The display apparatus as claimed in claim 16, wherein the red, green and blue pixels have a same thickness.

18. The display apparatus as claimed in claim 17, wherein the green pixel has a smaller area than an area of each of the red and blue pixels, and the blue pixel has a larger area than an area of each of the red and green pixels.

19. The display apparatus as claimed in claim 17, further comprising an electrophoretic layer including a plurality of electrophoretic particles, the electrophoretic layer being interposed between the pixel electrodes and the common electrode.

20. The display apparatus as claimed in claim 19, wherein the plurality of electrophoretic particles comprise a plurality of black particles and a plurality of white particles having a different polarity than a polarity of the plurality of black particles.

21. The display apparatus as claimed in claim 20, further comprising a liquid crystal layer interposed between the common electrode and the pixel electrodes.

22. The display apparatus as claimed in claim 21, further comprising an overcoat layer disposed between the color pixels and the common electrode.