ELECTRO-OPTICAL DEVICE, COLOR FILTER SUBSTRATE AND ELECTRONIC APPARATUS

• US 20100053512A1
• Filed: 07/01/2009
• Published: 03/04/2010
• Est. Priority Date: 09/01/2008
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Taniguchi, Yoshio, Mochizuki, Hiroaki, Kawata, Hirotaka, Ushiyama, Hidetoshi
• Granted Patent: US 8,189,142 B2
• Time in Patent Office: Days
• US Class Current: 349/106
• CPC Class Codes: G02F 1/133368 Cells having two substrates with different characteristics, e.g. different thickness or material
• CPC Class Codes: G02F 1/133371 Cells with varying thickness of the liquid crystal layer
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells

Abstract

Provided is an electro-optical device including: a pair of substrates; an electro-optical material sandwiched between the pair of substrates; a seal material disposed in a seal region located at the periphery of a region in which the electro-optical material is provided on the pair of substrates so as to bond the pair of substrate to each other, between the pair of substrates; and a coloring layer provided in a concave portion formed in the region in which the electro-optical material is provided on one substrate, wherein a upper surface of a coloring layer facing the electro-optical material is formed nearer to the other substrate than a seal region surface overlapping with the seal material on one substrate.

Claims

1. An electro-optical device comprising:

a pair of substrates;

an electro-optical material sandwiched between the pair of substrates;

a seal material disposed in a seal region located at the periphery of a region in which the electro-optical material is provided on the pair of substrates so as to bond the pair of substrate to each other, between the pair of substrates;

a concave portion provided on one substrate;

a coloring layer provided in the concave portion formed in the region in which the electro-optical material is provided, an upper surface of the coloring layer facing the electro-optical material being formed nearer to the other substrate than a seal region surface overlapping with the seal material on one substrate.

2. The electro-optical device according to claim 1, wherein:

the seal material includes a gap material which controls a gap between the pair of substrates, and

when the thickness of the electro-optical material is G [μ

m] and the size of a step difference between the coloring layer upper surface and the seal region surface is d [μ

m], the following equation is satisfied;

G+d≧

2.0.

3. The electro-optical device according to claim 1, wherein the concave portion is formed by removing at least one of one substrate and an insulating film formed on one substrate.

4. The electro-optical device according to claim 1, further comprising a step difference reduction film provided so as to define the concave portion in a region including the seal region of one substrate and to reduce a step difference between the coloring layer upper surface and the seal region surface.

5. The electro-optical device according to claim 4, wherein the step difference reduction film is formed of any one of an insulating film, a metal film and photoresist.

8. An electronic apparatus comprising the electro-optical device according to claim 1.

6. A color filter substrate comprising:

a substrate;

a concave portion provided in the substrate; and

a coloring layer provided in the concave portion and more protruding than a substrate surface in which the concave portion is not formed.

7. A color filter substrate comprising:

a substrate;

an insulating film provided on the substrate;

a concave portion formed by removing a portion of the insulating film; and

a coloring layer provided in the concave portion and more protruding than an insulating film upper surface in which the concave portion is not formed.