IP Library Granted Patent US 7,554,632
Granted Patent B2
US 7,554,632 · App. 11/906,976 · Granted Jun 30, 2009

Liquid crystal device and electronic apparatus provided with the same

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Quick Facts
Patent No.
US 7,554,632
App. No.
11/906,976
Filed
Oct 4, 2007
Granted
Jun 30, 2009
Kind
B2
Art Unit
2871
USPC
349/113
Abstract

Reflective display and transmissive display are performed by driving liquid crystal in a predetermined area (region b) in a non-crossing region by using an oblique electric field. Light passed through the region b when a voltage is applied is shaded since the liquid crystal in the region b is driven. Accordingly, at a position of a second substrate 2 b corresponding to the region b, it is not necessary to provide a shading film 22 . Consequently, a line width S 1 of the shading film 22 can be designed to be smaller compared to that of a conventional one, and hence, a high aperture ratio can be obtained.

Claims (29)

1. A liquid crystal device comprising:

a pair of substrates;

a liquid crystal layer between the substrates;

an electrode;

a reflector that overlaps the electrode in plan view at an overlapping region;

a shading film laterally spaced from the overlapping region in plan view so that an edge of the shading film is separated from an edge of the overlapping region by a gap,

wherein the electrode serves as a common electrode and the reflector serves as a pixel electrode.

2. A liquid crystal device comprising:

a pair of substrates;

a liquid crystal layer between the substrates;

an electrode;

a reflector that overlaps the electrode in plan view at an overlapping region;

a shading film laterally spaced from the overlapping region in plan view so that an edge of the shading film is separated from an edge of the overlapping region by a gap; and

a thin-film transistor that controls application of voltage to the reflector,

wherein the electrode serves as a common electrode and the reflector serves as a pixel electrode.

3. A liquid crystal device comprising:

a pair of substrates;

a liquid crystal layer between the substrates;

an electrode;

a reflector that overlaps the electrode in plan view at an overlapping region;

a shading film laterally spaced from the overlapping region in plan view so that an edge of the shading film is separated from an edge of the overlapping region by a gap; and

another reflector adjacent to the reflector, the reflector and the another reflector serving as pixel electrodes of adjacent pixels in a pixel matrix, the shading film being laterally positioned between the reflector and the another reflector in plan view.

4. A liquid crystal device comprising:

a pair of substrates;

a liquid crystal layer between the substrates;

an electrode;

a reflector that overlaps the electrode in plan view at an overlapping region;

a shading film laterally spaced from the overlapping region in plan view so that an edge of the shading film is separated from an edge of the overlapping region by a gap,

wherein the electrode and the reflector are disposed on opposite sides of the liquid crystal layer.