Display apparatus with color pixels

• US 8,022,422 B2
• Filed: 07/19/2010
• Issued: 09/20/2011
• 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:
  US12/838,735
• Publication Number:
  US 20100276707A1
• Time in Patent Office: 428 Days
• Field of Search: 257 89- 90, 257/440, 257/E31.121, 257/88
• 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;

a plurality of pixel areas disposed in a matrix on the first base substrate, each of the pixel areas including a pixel electrode receiving a pixel voltage;

a second base substrate which faces the first base substrate;

a color filter layer disposed on the second base substrate, the color filter layer comprising a plurality of color pixels which correspond to the pixel areas in a one-to-one correspondence and having a plurality of holes; and

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

wherein at least one of the holes is disposed between the two adjacent color pixels, gray scales of the pixel areas are formed by electric fields between the pixel electrodes and the common electrode, and each of areas where the holes are disposed displays a white or a black color according to the gray scale of the corresponding pixel area.

2. The display apparatus as claimed in claim 1, further comprising a black matrix disposed on the second base substrate.

3. The display apparatus as claimed in claim 1, wherein each of the color pixels comprises one of red, green and blue pixels.

4. The display apparatus as claimed in claim 3, wherein the red, green and blue pixels have different area sizes than each other.

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

6. The display apparatus as claimed in claim 4, wherein the red, green and blue pixels have different widths each other in a cross sectional view.

7. The display apparatus as claimed in claim 3, the red, green and blue pixels have a same thickness.

8. The display apparatus as claimed in claim 1, wherein each of the color pixels is positioned at a central portion of an area of the corresponding pixel area and the holes are positioned at an area adjacent to the color pixels.