ELECTRO-OPTICAL DEVICE AND ELECTRONIC APPARATUS

• US 20070008461A1
• Filed: 07/07/2006
• Published: 01/11/2007
• Est. Priority Date: 07/07/2005
• Status: Active Grant

• Current Assignee: Japan Display West Incorporated (Japan Display Incorporated)
• Original Assignee: Sanyo Epson Imaging Devices Corporation (Seiko Group)
• Inventors: HORIGUCHI, Masahiro, TANAKA, Chihiro, TANAKA, Shinichiro, KANEKO, Hideki, UEHARA, Toshinori, KOBAYASHI, Kazu
• Granted Patent: US 7,701,533 B2
• Time in Patent Office: Days
• US Class Current: 349/106
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133555 Transflectors
• CPC Class Codes: G02F 2201/52 RGB geometrical arrangements

Abstract

An electro-optical device includes: a plurality of display pixels each of which has two Red sub-pixels, two Green sub-pixels, one Blue sub-pixel, and one transparent sub-pixel; and a colored layer which is partially formed on the Red, Green, and Blue sub-pixels. In the electro-optical device, uncolored portions are formed in parts of the Red and Green sub-pixels where the colored layer is not formed.

Claims

1. An electro-optical device comprising:

a plurality of display pixels each of which has two Red sub-pixels, two Green sub-pixels, one Blue sub-pixel, and one transparent sub-pixel; and

a colored layer which is partially formed on the Red, Green, and Blue sub-pixels,

wherein uncolored portions are formed in parts of the Red and Green sub-pixels where the colored layer is not formed.

2. The electro-optical device according to claim 1,

wherein, in each display pixel, the total area of the Blue sub-pixel and the transparent sub-pixel is substantially equal to the area of the two Red sub-pixels and is substantially equal to the area of the two Green sub-pixels.

3. The electro-optical device according to claim 1,

wherein each of the Red, Green, and Blue sub-pixels has a transmissive region and a reflective region, and

the uncolored portion is formed in the transmissive region of each of the Red and Green sub-pixels.

4. The electro-optical device according to claim 1,

wherein each of the Red, Green, and Blue sub-pixels has a transmissive region and a reflective region, and

the uncolored portion is formed in the reflective region of each of the Red and Green sub-pixels.

5. The electro-optical device according to claim 4,

wherein the uncolored portion is formed in the transmissive region of each of the Red and Green sub-pixels.

6. The electro-optical device according to claim 3,

wherein the area of the uncolored portion of the transmissive region of each of the Green sub-pixels is larger than the area of the uncolored portion of the transmissive region of each of the Red sub-pixels.

7. The electro-optical device according to claim 4,

wherein the area of the uncolored portion of the reflective region of each of the Green sub-pixels is larger than the area of the uncolored portion of the reflective region of each of the Red sub-pixels.

8. The electro-optical device according to claim 1,

wherein the chromaticity of white displayed by using the Red, Green, Blue, and transparent sub-pixels is in a coordinate range expressed by (X, Y)=(0.3 to 0.4, 0.3 to 0.4) in a CIE (International Commission on Illumination) chromaticity diagram.

9. The electro-optical device according to claim 1,

wherein the uncolored portion of each of the Red sub-pixels has an area larger than 10% of the area of the Red sub-pixel.

10. The electro-optical device according to claim 1,

wherein the uncolored portion of each of the Green sub-pixels has an area larger than 30% of the area of the Green sub-pixel.

11. The electro-optical device according to claim 1,

wherein each of the Red, Green, and Blue sub-pixels of one of the plurality of display pixels performs display by superimposing a gray-scale signal which is applied for display of the sub-pixels in one display pixel to sub-pixels having the same color with the one display pixel around the one display pixel.

13. An electronic apparatus comprising the electro-optical device according to claim 1 as a display unit.

12. An electro-optical device comprising:

a plurality of display pixels each of which has at least a transparent sub-pixel and one color sub-pixel; and

a colored layer which is formed on the one color sub-pixel,

wherein an uncolored portion is provided in a part of the one color sub-pixel where the colored layer is not formed.