ELECTRO-OPTICAL DEVICE AND ELECTRONIC EQUIPMENT

• US 20120099067A1
• Filed: 10/10/2011
• Published: 04/26/2012
• Est. Priority Date: 10/25/2010
• Status: Active Grant

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Hara, Hiroyuki, Yokota, Tomoki
• Granted Patent: US 8,896,793 B2
• Time in Patent Office: Days
• US Class Current: 349/139
• CPC Class Codes: G02F 1/133388 with constructional differences between the display region and the peripheral region
• CPC Class Codes: G02F 1/13454 Drivers integrated on the active matrix substrate G02F1/136277 takes precedence
• CPC Class Codes: G02F 1/13456 Cell terminals located on one side of the display only
• 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 1/136213 Storage capacitors associated with the pixel electrode
• 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 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/13629 Multilayer wirings
• CPC Class Codes: G02F 2201/48 Flattening arrangements
• CPC Class Codes: H04N 9/3105 for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators simultaneous projection in colour photography G03B33/10; beam splitting or combining systems per se G02B27/10

Abstract

In a display region, pixel electrodes are arranged with a predetermined pitch in a matrix. Dummy pixel electrodes provided in a dummy display region surrounding the display region are formed from the same layer as the pixel electrodes, and are arranged in an island shape so as to have the same size and pitch as the pixel electrodes. The dummy pixel electrodes are connected to each other via a wire positioned under the pixel electrodes.

Claims

1. An electro-optical device comprising:

an element substrate; and

an opposite substrate disposed to face the element substrate,

wherein the element substrate includes

a plurality of pixel electrodes formed at a side facing the opposite substrate and arranged with a predetermined pitch for each pixel;

a driving circuit that is located between the plurality of pixel electrodes and a edge of the element substrate in the plan view and drives the plurality of pixels;

a plurality of dummy pixel electrodes provided between the plurality of pixel electrodes and the edge of the element substrate, formed from the same layer as the plurality of pixel electrodes, and arranged so as to have substantially the same density as the plurality of pixel electrodes in the plan view; and

a wire disposed on a layer different from the plurality of pixel electrodes and electrically connecting the plurality of dummy pixel electrodes, which are adjacent to each other in at least one direction among the plurality of dummy pixel electrodes, to each other.

2. The electro-optical device according to claim 1, wherein the element substrate includes

a plurality of scan lines;

a plurality of data lines intersecting the plurality of scan lines in the plan view; and

a shield electrode provided between the data line and the pixel electrode in the cross-sectional view, formed to cover the data line in the plan view, and applied with a predetermined voltage,

wherein the pixel electrode is provided at each of intersections of the plurality of scan lines and the plurality of data lines in the plan view, and

wherein the wire is formed from the same layer as the shield electrode and is applied with the predetermined voltage.

3. The electro-optical device according to claim 2, wherein the common electrode is applied with a predetermined common voltage, and

wherein the predetermined voltage is the common voltage.

4. The electro-optical device according to claim 1, wherein the element substrate includes

a plurality of scan lines;

and

a plurality of data lines intersecting the plurality of scan lines in the plan view,

wherein the pixel electrode is provided at each of intersections of the plurality of scan lines and the plurality of data lines in the plan view, and

wherein the driving circuit includes

two scan line driving circuits respectively driving each of the plurality of scan lines from both end sides of the plurality of scan lines; and

a data line driving circuit driving each of the plurality of data lines from one end side of the plurality of data lines.

5. The electro-optical device according to claim 4, wherein the wire is a first wire formed from an electrode layer different from the data line, and

wherein the dummy pixel electrodes located between the data line driving circuit and the plurality of pixel electrodes among the plurality of dummy pixel electrodes are connected to each other via the first wire.

6. The electro-optical device according to claim 4, wherein the wire is a second wire formed from the same electrode layer as the data line, and

wherein the dummy pixel electrodes located between the scan line driving circuit and the plurality of pixel electrodes among the plurality of dummy pixel electrodes are connected to each other via the second wire.

7. The electro-optical device according to claim 4, wherein a voltage higher than the common voltage by a predetermined value and a voltage lower than the common voltage by the predetermined value are alternately applied to the dummy pixel electrode at a predetermined period.

8. The electro-optical device according to claim 1, wherein an insulating material is buried in a gap between the pixel electrodes and a gap between the dummy pixel electrodes in the plan view.

9. The electro-optical device according to claim 1, further comprising a conductive pattern provided at a position surrounding the dummy pixel electrode in the plan view, formed from the same layer as the pixel electrode, and not connected to the dummy pixel electrode.

10. The electro-optical device according to claim 1, wherein the dummy pixel electrodes are arranged so as to have substantially the same size and pitch as the pixel electrodes in the plan view.

11. Electrode equipment comprising the electro-optical device according to claim 1.