LIQUID CRYSTAL PANEL SUBSTRATE, LIQUID CRYSTAL PANEL, AND ELECTRONIC EQUIPMENT AND PROJECTION TYPE DISPLAY DEVICE BOTH USING THE SAME

• US 20110170025A1
• Filed: 03/17/2011
• Published: 07/14/2011
• Est. Priority Date: 10/22/1996
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: YASUKAWA, Masahiro
• Granted Patent: US 8,208,101 B2
• Time in Patent Office: Days
• US Class Current: 349/5
• 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

The present invention is a liquid crystal panel substrate that comprises: pixel units each having a pixel electrode, to be used as a reflective electrode and arranged in a matrix pattern on a substrate, and a switching element controlling a voltage applied to the pixel electrode; wherein between the pixel electrode and a conductive layer forming a terminal electrode of the switching element, a contact hole is provided for connecting the pixel electrode and the terminal electrode. A light-shielding layer, having an opening surrounding the portion in which the contact hole is formed, and having no opening in regions between a plurality of adjacent pixel electrodes, is formed between the pixel electrode and the conductive layer. Harmful effects due to light leaking through a space between the pixel electrodes can thereby be prevented.

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, the second light-shielding film being formed from the same layer as the first light-shielding film.

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.