Liquid crystal panel substrate with light-shielding film in a periphery region, liquid crystal panel, and electronic equipment and projection type display device both using the same

• US 8,208,101 B2
• Filed: 03/17/2011
• Issued: 06/26/2012
• Est. Priority Date: 10/22/1996
• Status: Expired due to Fees

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Yasukawa, Masahiro
• Primary Examiner(s): NGO, HUYEN LE
• Application Number:
  US13/050,376
• Publication Number:
  US 20110170025A1
• Time in Patent Office: 467 Days
• Field of Search: 349/110, 349/113, 349139-141
• US Class Current: 349/113
• CPC Class Codes: G02F 1/133345 Insulating layers G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/133502 Antiglare, refractive index matching layers
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/133553 Reflecting elements associated to illuminating devices G02F1/133605
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
• CPC Class Codes: G02F 1/136209 Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element
• CPC Class Codes: G02F 1/136227 Through-hole connection of the pixel electrode to the active element through an insulation layer
• CPC Class Codes: G02F 1/136277 formed on a semiconductor substrate, e.g. of silicon
• CPC Class Codes: G02F 2203/02 reflective
• CPC Class Codes: H01L 27/12 the substrate being other than a semiconductor body, e.g. an insulating body
• CPC Class Codes: H04N 9/3141 Constructional details thereof details not peculiar to the presence of an electronic spatial light modulator G03B21/14

Abstract

A substrate is provided having a pixel region including a pixel electrode and a switching element. A periphery region in the periphery of the pixel region includes a first light-shielding film, the first light-shielding film being formed from the same layer as the pixel electrode. A passivation film that covers the pixel electrode and the first light-shielding film is provided.

Claims

1. A substrate comprising:

a pixel region including a pixel electrode and a switching element;

a periphery region in the periphery of the pixel region, the periphery region including a first light-shielding film, the first light-shielding film being formed from the same layer as the pixel electrode;

a passivation film that covers the pixel electrode and the first light-shielding film.

2. The substrate as set forth in claim 1, further comprising a periphery circuit disposed in the periphery region, wherein the passivation film includes a silicon nitride film in the periphery region.

3. The substrate as set forth in claim 1, wherein the passivation film includes a silicon oxide film in the periphery region.

4. The substrate as set forth in claim 1, further comprising a second light-shielding film disposed between the pixel electrode and the switching element in the pixel region.

5. A liquid crystal panel comprising:

a substrate as set forth in claim 1;

a light-incident-side substrate positioned opposing said substrate with a space therebetween; and

a liquid crystal encapsulated in said space.

6. Electronic equipment comprising the liquid crystal panel as set forth in claim 5 as a display portion.

7. A projection type display device comprising:

a light source;

the liquid crystal panel as set forth in claim 5 for reflecting and modulating light emerging from said light source; and

projection optical means for collecting and projecting light modulated by said liquid crystal panel.

8. A substrate comprising:

a pixel region including a pixel electrode and a switching element;

a periphery region in the periphery of the pixel region, the periphery region including a first light-shielding film, the first light-shielding film being formed from the same layer as the pixel electrode;

an inorganic film that covers the pixel electrode and the first light-shielding film.

9. The substrate as set forth in claim 8, wherein the inorganic film includes a silicon oxide film.

10. The substrate as set forth in claim 8, wherein the inorganic film includes a silicon nitride film.

11. A liquid crystal panel comprising:

a substrate as set forth in claim 8;

a light-incident-side substrate positioned opposing said substrate with a space therebetween; and

a liquid crystal encapsulated in said space.

12. Electronic equipment comprising the liquid crystal panel as set forth in claim 11 as a display portion.

13. A projection type display device comprising:

a light source;

the liquid crystal panel as set forth in claim 11 for reflecting and modulating light emerging from said light source; and

projection optical means for collecting and projecting light modulated by said liquid crystal panel.