SUBSTRATE FOR LIQUID CRYSTAL DISPLAY DEVICE, LIQUID CRYSTAL DISPLAY ELEMENT, AND LIQUID CRYSTAL DISPLAY DEVICE

• US 20090122242A1
• Filed: 11/27/2006
• Published: 05/14/2009
• Est. Priority Date: 11/29/2005
• Status: Active Grant

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Inventors: Nakamura, Hideyuki
• Granted Patent: US 7,804,563 B2
• Time in Patent Office: Days
• US Class Current: 349/110
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133707 Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes
• CPC Class Codes: G02F 1/13394 spacers regularly patterned on the cell subtrate, e.g. walls, pillars G02F1/133377 takes precedence

Abstract

A substrate for liquid crystal display includes at least: at least two substrates (a glass substrate and a TFT substrate); a liquid crystal layer disposed between the substrates; an ITO film that applies an electric field to the liquid crystal layer; a photospacer that regulates cell thickness (a thickness of a liquid crystal layer) between the substrates; a light-shielding film; and a colored layer, in which at least a part of the photospacer is formed on the light-shielding film or at a portion where the light-shielding film and the colored layer overlap; and the light-shielding film includes at least one of a resin and a precursor thereof and also includes metal particles having a silver-tin alloy portion.

Claims

1. A substrate for liquid crystal display comprising at least:

at least two substrates;

a liquid crystal layer disposed between the substrates;

an electrode that applies an electric field to the liquid crystal layer;

a photospacer that regulates cell thickness between the substrates;

a light-shielding film; and

a colored layer, wherein

at least a part of the photospacer is formed on the light-shielding film or at a portion where the light-shielding film and the colored layer overlap; and

the light-shielding film includes at least one of a resin and a precursor thereof and also includes metal particles having a silver-tin alloy portion.

2. The substrate for liquid crystal display of claim 1, wherein the ratio of silver in the metal particles having a silver-tin alloy portion is in a range of 30 to 80% by mole.

3. The substrate for liquid crystal display device of claim 1, wherein an in-plane height variation of the light-shielding film is within 0.2 μ

m in terms of 3σ

(σ

;

a standard deviation among measurement points taken every 1 cm on a 1 m×

1 m substrate).

4. The substrate for liquid crystal display of claim 1, wherein the amount of the metal particles in the light-shielding film is in a range of 5 to 20% by volume with respect to the total solid content of the light-shielding film.

5. The substrate for liquid crystal display device of claim 1, wherein the light-shielding film is formed by a coating process.

6. The substrate for liquid crystal display device of claim 1, wherein the light-shielding film is formed by a transfer process.

7. The substrate for liquid crystal display device of claim 1, wherein the metal particles have a number average particle size in a range of 20 to 700 mm.

8. A liquid crystal display element, comprising the substrate for liquid crystal display of claim 1.

9. A liquid crystal display device, comprising the liquid crystal display element of claim 8.