ELECTRO-OPTICAL DEVICE, PROJECTION-TYPE DISPLAY DEVICE, AND ELECTRONIC APPARATUS

• US 20120249905A1
• Filed: 03/27/2012
• Published: 10/04/2012
• Est. Priority Date: 04/01/2011
• Status: Active Grant

• Current Assignee: 138 East LCD Advancements Limited (Vector Capital Corporation)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Ito, Satoshi, Tateno, Yoshitake
• Granted Patent: US 9,299,729 B2
• Time in Patent Office: Days
• US Class Current: 349/38
• CPC Class Codes: G02F 1/136213 Storage capacitors associated with the pixel electrode
• CPC Class Codes: G02F 1/13629 Multilayer wirings
• CPC Class Codes: H01L 27/1255 integrated with passive devices, e.g. auxiliary capacitors
• CPC Class Codes: H01L 28/60 Electrodes

Abstract

An electro-optical device includes a substrate; a translucent pixel electrode installed at one side of the substrate; and a storage capacitor which is installed between the pixel electrode and the substrate, and in which a translucent first electrode layer overlapping with the pixel electrode in a plane view, a translucent second electrode layer electrically connected to the pixel electrode, and a translucent dielectric layer interposed between the first electrode layer and the second electrode layer are laminated.

Claims

1. An electro-optical device, comprising:

a substrate;

a translucent pixel electrode installed at one side of the substrate; and

a storage capacitor which is installed between the pixel electrode and the substrate, and in which a translucent first electrode layer overlapping with the pixel electrode in a plane view, a translucent second electrode layer electrically connected to the pixel electrode, and a translucent dielectric layer interposed between the first electrode layer and the second electrode layer are laminated.

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

wherein the first electrode layer has an opening in a region overlapping the space between adjacent pixel electrodes, and

wherein, in a region overlapping with the opening in a plane view, a first relay electrode electrically connecting the pixel electrode and the second electrode layer is installed.

3. The electro-optical device according to claim 2,

wherein the first relay electrode includes an extended portion extending in a first direction in a region overlapping the space between adjacent pixel electrodes in a plane view, and a curved portion curved from the extended portion in a second direction crossing the first direction and,

wherein a first contact hole for electrically connecting the first relay electrode and the second electrode layer is installed in a region overlapping with the extended portion, and

wherein a second contact hole for electrically connecting the first relay electrode and the pixel electrode is installed in a region overlapping with the curved portion.

4. The electro-optical device according to claim 2, further comprising:

a transistor installed to correspond to the pixel electrode; and

a second relay electrode for electrically connecting the transistor and the first relay electrode,

wherein the second relay electrode is disposed to overlap with the transistor in a plane view and disposed to extend in the first direction in the region overlapping the space between adjacent pixel electrodes,

wherein the first relay electrode includes, in a plane view, an overlapping portion extending in the first direction in the region overlapping the space between adjacent pixel electrodes to overlap with the second relay electrode in a plane view, and a protruding portion protruding in the first direction from the end of the second relay electrode in the region overlapping the space between adjacent pixel electrodes in a plane view,

wherein the second electrode layer is electrically connected to the overlapping portion through the first contact hole, and

wherein the pixel electrode is electrically connected to the protruding portion through the second contact hole.

5. The electro-optical device according to claim 1,

wherein the first electrode layer is installed to the dielectric layer at the substrate side, and

wherein the second electrode layer is installed to the dielectric layer at the pixel electrode side.

6. The electro-optical device according to claim 1,

wherein the first electrode layer is installed to the dielectric layer at the pixel electrode side, and

wherein the second electrode layer is installed to the dielectric layer at the substrate side.

7. The electro-optical device according to claim 1, wherein the surface of an interlayer insulating film installed between the storage capacitor and the pixel electrode has a flat side.

8. The electro-optical device according to claim 1, wherein the first electrode layer is installed at the entire surface of a pixel arrangement region where a plurality of the pixel electrodes are arranged.

9. The electro-optical device according to claim 1,

wherein a light-shielding layer is installed in the region overlapping the space between adjacent pixel electrodes in a plane view, and

wherein the storage capacitor is at least installed within the region overlapping a translucent region surrounded by the light-shielding layer in a plane view.

10. The electro-optical device according to claim 1,

wherein the substrate retains the liquid crystal layer between the substrate and a translucent opposite substrate arranged to face each other at one surface side of the substrate.

11. A projection-type display device, comprising:

the electro-optical device according to claim 1;

a light source unit for outputting the illumination light radiated to the electro-optical device; and

an optical projecting system for projecting the light modulated by the electro-optical device.

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