Liquid crystal display device

• US 20010040658A1
• Filed: 04/09/2001
• Published: 11/15/2001
• Est. Priority Date: 05/15/2000
• Status: Active Grant

• Current Assignee: Panasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Hitachi Displays Limited (Japan Display Incorporated)
• Inventors: Nakamura, Yoshiaki, Uehara, Masao, Hiraga, Koji, Fujieda, Masayoshi, Yoshida, Kazutoshi, Hoshino, Noboru, Nemoto, Souta
• Granted Patent: US 6,697,137 B2
• Time in Patent Office: Days
• US Class Current: 349/113
• CPC Class Codes: G02F 1/133553 Reflecting elements associated to illuminating devices G02F1/133605
• CPC Class Codes: G02F 1/133555 Transflectors

Abstract

A liquid crystal is interposed between a first transparent substrate having one electrodes and a second transparent substrate having the other electrodes. Pixel regions are formed at portions where the one electrodes and the other electrodes are opposed to each other. A semitransparent reflecting film is formed between the first transparent substrate and the one electrodes. The semitransparent reflecting film is formed with light transmission apertures in each pixel region. The semitransparent reflecting film also occupies portions corresponding to the gaps between the adjacent pixel regions. Alternatively, in addition to the light transmission apertures, the semitransparent reflecting film is formed with slits at positions corresponding to the gaps between the adjacent pixel regions. A light absorption film is formed between the first transparent substrate and the semitransparent reflecting film at positions corresponding to the slits, or the slits are charged with a light absorption film.

Claims

1. A liquid crystal display device comprising:

a first transparent substrate having a plurality of first electrodes;

a second transparent substrate having a plurality of second electrodes that are opposed to the first electrodes;

a liquid crystal interposed between the first transparent substrate and the second transparent substrate;

an illumination light source disposed on the back side of the first transparent substrate;

pixel regions formed at portions where the first electrodes and the second electrodes are opposed to each other; and

a reflecting film formed between the first transparent substrate and the first electrodes, the reflecting film having one or a plurality of light transmission apertures in each pixel region and not having slits at positions corresponding to gaps between adjacent ones of the pixel regions.

2. A liquid crystal display device according to

claim 1

, wherein the reflecting film is an opaque reflecting film.

3. A liquid crystal display device according to

claim 1

, wherein the reflecting film is a semitransparent reflecting film.

4. A liquid crystal display device according to

claim 1

, further comprising color filter layers between the second transparent substrate and the second electrodes, wherein peripheral portions of adjacent ones of the color filter layers overlap with each other at positions corresponding to the gaps between adjacent ones of the pixel regions.

5. A liquid crystal display device comprising:

a first transparent substrate having a plurality of first electrodes;

a second transparent substrate having a plurality of second electrodes that are opposed to the first electrodes;

a liquid crystal interposed between the first transparent substrate and the second transparent substrate;

an illumination light source disposed on the back side of the first transparent substrate;

pixel regions formed at portions where the first electrodes and the second electrodes are opposed to each other;

a reflecting film formed between the first transparent substrate and the first electrodes, the reflecting film having one or a plurality of light transmission apertures in each pixel region and slits at positions corresponding to gaps between adjacent ones of the pixel regions; and

a light absorption film formed between the first transparent substrate and the reflecting film at positions corresponding to the slits.

6. A liquid crystal display device according to

claim 5

, wherein the reflecting film is an opaque reflecting film.

7. A liquid crystal display device according to

claim 5

, wherein the reflecting film is a semitransparent reflecting film.

8. A liquid crystal display device comprising:

a first transparent substrate having a plurality of first electrodes;

a second transparent substrate having a plurality of second electrodes that are opposed to the first electrodes;

a liquid crystal interposed between the first transparent substrate and the second transparent substrate;

an illumination light source disposed on the back side of the first transparent substrate;

pixel regions formed at portions where the first electrodes and the second electrodes are opposed to each other;

a reflecting film formed between the first transparent substrate and the first electrodes, the reflecting film having one or a plurality of light transmission apertures in each pixel region and slits at positions corresponding to gaps between adjacent ones of the pixel regions; and

a light absorption film with which the slits are charged.

9. A liquid crystal display device according to

claim 8

, wherein the reflecting film is an opaque reflecting film.

10. A liquid crystal display device according to

claim 8

, wherein the reflecting film is a semitransparent reflecting film.