Liquid crystal display

• US 20040169793A1
• Filed: 04/05/2004
• Published: 09/02/2004
• Est. Priority Date: 04/04/2002
• Status: Abandoned Application

• Current Assignee: Japan Display West Incorporated (Japan Display Incorporated)
• Original Assignee: Japan Display West Incorporated (Japan Display Incorporated)
• Inventors: Tanaka, Tsutomu, Yamaguchi, Hidemasa, Nakamura, Shinji, Ino, Masumitsu, Fukunaga, Yoko
• Application Number:
  US10/479,673
• Publication Number:
  US 20040169793A1
• 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 1/136222 Colour filters incorporated in the active matrix substrate
• CPC Class Codes: G02F 2203/09 transflective

Abstract

A liquid crystal display improving luminance etc. in a reflection type display without being accompanied by an increase of production steps, and able to secure a luminance etc. in a transmission type display at an equivalent level to that of a display device for only a transmission type display, having a display panel comprising a TFT substrate 1 formed with a pixel region 4 having a reflection region A for reflection type display and a transmission region B for transmission type display and a color filter substrate 2 formed with color filters 29 located corresponding to the pixel region 4 arranged facing each other across a liquid crystal layer 3, the color filters 29 located corresponding to the reflection region A being formed under the same conditions as those for the color filters 29a located corresponding to the transmission region B, specifically by the same thickness and the same material. Further, the color filters 29 located corresponding to the reflection region A are formed with at least one opening 33.

Claims

1. An liquid crystal display having a display panel comprised of a substrate formed with a pixel region having a reflection region for reflection type display and a transmission region for transmission type display and a substrate formed with a color filter located corresponding to the pixel region arranged facing each other across a liquid crystal layer, wherein

the color filter located corresponding to the reflection region is formed under the same condition as that for the color filter located corresponding to the transmission region, and is formed with one or more uncolored regions.

2. A liquid crystal display as set forth in claim 1, wherein a reflectance of light at said display panel due to said reflection region is at least 1 percent and not more than 30 percent and a transmittance of light at said display panel due to said transmission region is at least 4 percent and not more than 10 percent.

3. A liquid crystal display as set forth in claim 1, wherein said uncolored region includes an opening.

4. A liquid crystal display as set forth in claim 1, wherein said uncolored region is formed at a location corresponding to substantially the center of said reflection region.

5. A liquid crystal display as set forth in claim 1, wherein said uncolored region is formed to at least a 1 μ

m of an opening width and not more than the area of said reflection region.

6. A liquid crystal display as set forth in claim 1, wherein said uncolored region is polygonal in shape.

7. A liquid crystal display as set forth in claim 1, wherein said uncolored region is circular in shape.

8. A liquid crystal display including a plurality of pixel regions arranged in a matrix between a first substrate and a second substrate, a plurality of gate lines connecting the plurality of pixel regions and selecting a pixel region for display, and a plurality of data signal lines connecting the plurality of pixel regions and transmitting image data to said pixel region to perform the display, wherein:

each pixel region has a reflection region for display by reflecting light from the outside and a transmission region for display by passing light from an internal light source arranged in parallel;

in each pixel region, color filters are provided on said first substrate at locations corresponding to said reflection region and said transmission region;

color filters of adjacent pixel regions are superimposed at a boundary region; and

an uncolored region is formed at part of the corresponding region of said reflection region.

9. A liquid crystal display as set forth in claim 8, wherein a data signal line has formed on it between said first and second substrates a spacer for controlling a gap between said first and second substrates.

10. A liquid crystal display as set forth in claim 9, wherein said uncolored region is formed at a location of said color filters corresponding to a portion other than the regions where said spacers of said reflection region are formed and said superimposed regions.

11. A liquid crystal display as set forth in claim 10, wherein said uncolored region is formed at a location of said color filters corresponding to substantially the center of said reflection region.

12. A liquid crystal display as set forth in claim 11, wherein said uncolored region includes an opening.

13. A liquid crystal display as set forth in claim 8, wherein a region where a data signal line and a gate line intersect has formed at it between said first and second substrates a spacer for controlling a gap between said first and second substrates.

14. A liquid crystal display as set forth in claim 13, wherein said uncolored region is formed at a location of said color filters corresponding to a portion other than a region where said spacer of said reflection region is formed.

15. A liquid crystal display as set forth in claim 14, wherein said uncolored region includes an opening.

16. A liquid crystal display including a plurality of pixel regions arranged in a matrix between a first substrate and a second substrate, a plurality of gate lines connecting the plurality of pixel regions and selecting a pixel region for display, and a plurality of data signal lines connecting the plurality of pixel regions and transmitting image data to said pixel region for display, wherein

each pixel region has a reflection region for display by reflecting light from the outside and a transmission region for display by passing the light from an internal light source arranged in parallel;

each pixel region is provided with color filters at locations on said first substrate corresponding to said reflection region and said transmission region;

said first substrate is provided between said color filters of adjacent pixel regions with a light blocking film for blocking the light from the outside; and

an uncolored region is formed at part of the corresponding regions of said reflection region.

17. A liquid crystal display as set forth in claim 16, wherein a data signal line has formed on it between said first and second substrates a spacer for controlling a gap between said first and second substrates.

18. A liquid crystal display as set forth in claim 17, wherein said uncolored region is formed at a location of said color filters corresponding to a portion other than a region where said spacer of said reflection region is formed.

19. A liquid crystal display as set forth in claim 18, wherein said uncolored region includes an opening.

20. A liquid crystal display as set forth in claim 16, wherein a region where a data signal line and a gate line intersect has formed at it between said first and second substrates a spacer for controlling a gap between said first and second substrates.

21. A liquid crystal display as set forth in claim 20, wherein said color filters are provided with a light blocking film at a location corresponding to a region of said reflection region where said spacer is formed.

22. A liquid crystal display as set forth in claim 21, wherein said uncolored region is formed at a location of said color filters corresponding to a portion other than a region where said spacer of said reflection region is formed.

23. A liquid crystal display as set forth in claim 22, wherein said uncolored region includes an opening.