# US 7,609,352 B2 · Liquid crystal device, projection type display and electronic equipment

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- Number: US 7,609,352 B2
- Document ID: US7609352B2
- Status: Granted
- Kind: B2
- Application number: 12/216,035
- Filed: 2008-06-27
- Published: 2008-11-06
- Granted: 2009-10-27
- Earliest claimed: 2001-03-06
- Assignees: Seiko Epson Corporation
- Inventors: Tsuyoshi Maeda; Kinya Ozawa; Osamu Okumura; Eiji Okamoto; Hirotaka Kawata; Toshiharu Matsushima; Takumi Seki; Kimitaka Kamijo
- Web page: https://patentgrep.com/patent/US7609352B2

## CPC

- G02F 1/134363: {for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]}
- G03B 21/006: {using LCD's}
- G02F 1/133553: {Reflecting elements (associated to illuminating devices G02F1/133605)}
- G02F 1/13373: {Disclination line; Reverse tilt}
- G02F 1/136227: {Through-hole connection of the pixel electrode to the active element through an insulation layer}
- G02F 2201/40: Arrangements for improving the aperture ratio
- 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
- G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D)

## Abstract

The invention provides a reflection type liquid crystal device, and a projection type display and electronic equipment in which display defects caused by disclination are reduced, minimized or prevented from being produced for a highly fine liquid crystal display with a space between pixels made to be narrow to make it possible to provide a high-contrast and bright display. A liquid crystal device includes a liquid crystal layer sandwiched between a first substrate and a second substrate, and a first electrode and a second electrode formed on a face of the above-described second substrate on a side of the above-described liquid crystal layer. The above-described first electrode and the above-described second electrode are formed so that an electric field substantially parallel to the surface of the substrate with respect to the above-described liquid crystal layer can be applied thereto. The above-described first electrode is formed in a linear shape having a specified line width on the above-described second electrode with a second insulation film interposed therebetween. The above-described second electrode is formed in a rectangular shape, and at least one of the above-described first electrode and the above-described second electrode is a reflecting electrode that causes incident light coming from a direction of the above-described first substrate.

## Claims

### Claim 1

A liquid crystal device comprising:
a first substrate;
a second substrate;
a liquid crystal between the first substrate and the second substrate;
a common electrode located at the first-substrate side of the liquid crystal;
an insulating film; and
a pixel electrode located at the first-substrate side of the liquid crystal, the pixel electrode completely overlapping with the common electrode in plan view and separated from the common electrode by the insulating film, the pixel electrode including:
a first linear pixel segments extending in a first direction, and
a second linear pixel segments extending in a second direction that is different from the first direction, one of the first linear pixel segments being coupled to one of the second linear pixel segments and forming a chevron shape with the one of the second linear pixel segments.

### Claim 2 (depends on 1)

The liquid crystal device according to claim 1, further comprising an active element at the first-substrate side of the liquid crystal, the pixel electrode being electrically connected to the active element at a position substantially corresponding to where one of the first linear pixel segments is coupled to one of the second linear pixel segments.

### Claim 3 (depends on 2)

The liquid crystal device according to claim 2, the pixel electrode being electrically connected to the active element through an opening in the common electrode.

### Claim 4 (depends on 1)

The liquid crystal device according to claim 1, further comprising an active element at the first-substrate side of the liquid crystal, the pixel electrode being electrically connected to the active element through an opening in the common electrode.