# US 9,519,178 B2 · Color filter substrate, electro-optic device, and electronic apparatus

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- Number: US 9,519,178 B2
- Document ID: US9519178B2
- Status: Granted
- Kind: B2
- Application number: 13/446,076
- Filed: 2012-04-13
- Published: 2012-10-18
- Granted: 2016-12-13
- Earliest claimed: 2011-04-18
- Assignees: Seiko Epson Corporation
- Applicants: Minoru Moriwaki
- Inventors: Minoru Moriwaki
- Web page: https://patentgrep.com/patent/US9519178B2

## CPC

- G02F 1/133512: {Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence)}
- G02B 5/201: {in the form of arrays}
- G02F 1/133553: {Reflecting elements (associated to illuminating devices G02F1/133605)}
- G02F 2203/02: reflective
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

A color filter substrate includes a color filter layer, a light-transmissive layer and a light-shielding layer. The light-transmissive layer is disposed between pixels and includes a side surface that forms a reflection surface. The light-shielding layer is laminated on the light-transmissive layer.

## Claims

### Claim 1

A color filter substrate comprising:
a light-transmissive substrate including an incident surface and an outgoing surface with respect to transmitted light;
a plurality of pixels in which a color filter layer is formed;
a protrusion portion that is disposed between the plurality of pixels on the outgoing surface of the light-transmissive substrate and partitions the color filter layer, the protrusion portion including:
a light-transmissive layer comprising a light transmissive material that forms a reflective side surface, the reflective side surface being formed as an inclined surface and partitioning the color filter layer into at least a first color filter having a first color and a second color filter having a second color filter, the first color filter being directly adjacent to the second color filter; and
a light-shielding layer disposed such that the light-transmissive layer is disposed between the light-transmissive substrate and the light-shielding layer,
wherein
the light-transmissive layer is disposed between at least the first color filter and the second color filter,
the light-transmissive layer disposed between the first color filter and the second color filter includes both a first strip-shaped light-transmissive layer and a second strip-shaped light-transmissive layer parallel to the first strip-shaped light-transmissive layer,
the first strip-shaped light-transmissive layer has a first side surface facing the first color filter and a second side surface facing the second strip-shaped light-transmissive layer, and
the second strip-shaped light-transmissive layer has a first side surface facing the second color filter and a second side surface facing the first strip-shaped light-transmissive layer.

### Claim 2 (depends on 1)

The color filter substrate according to claim 1, wherein a side surface of the light-transmissive layer forms the reflective side surface by laminating the light-shielding layer on the side surface.

### Claim 3 (depends on 2)

The color filter substrate according to claim 2,
wherein the reflective side surface is formed by laminating the light-shielding layer on the second side surface of the first strip-shaped light-transmissive layer oriented toward the second strip-shaped light-transmissive layer, and
wherein the reflective side surface is formed by laminating the light-shielding layer on the second side surface of the second strip-shaped light-transmissive layer oriented toward the first strip-shaped light-transmissive layer.

### Claim 4 (depends on 1)

An electro-optic device comprising:
a counter substrate including the color filter substrate according to claim 1;
an element substrate in which a pixel transistor and a pixel electrode are formed; and
a liquid crystal layer interposed between the counter substrate and the element substrate.

### Claim 5 (depends on 4)

An electronic apparatus comprising:
the electro-optic device according to claim 4.