Electro-optical device, projection-type display device, electronic device, and manufacturing method of the electro-optical device

Patent metadata

Field	Value
Publication number	US-9529220-B2
Application number	US-201514794735-A
Country	US
Kind code	B2
Filing date	Jul 8, 2015
Priority date	Jul 21, 2011
Publication date	Dec 27, 2016
Grant date	Dec 27, 2016

Abstract

In the electro-optical device, a pillar-shaped protrusion is formed on an insulating film (a first insulating film) provided below a pixel electrode in the downward direction, and thus a conduction section of a second electrode layer (a conductive layer) overlaps the highest surface of the pillar-shaped protrusion. An inter-layer insulating film (a second insulating film) is provided between the second electrode layer and the pixel electrode, but the conduction section is exposed on a surface of the inter-layer insulating film. For this reason, the pixel electrode is electrically connected to the conduction section, when the pixel electrode is laminated on the inter-layer insulating film.

First claim

What is claimed is:

1. An electro-optical device comprising:
a pixel electrode provided over one side of a substrate;
a conductive layer provided between the substrate and the pixel electrode, the conductive layer including a conduction section protruding toward the pixel electrode;
a relay electrode provided between the substrate and the conductive layer;
a first insulating film provided between the substrate and the pixel electrode, the first insulating film having a protrusion protruding toward the pixel electrode and an opening overlapping the relay electrode; and
a second insulating film provided between the conductive layer and the pixel electrode;
wherein the pixel electrode is electrically connected to the conduction section, and the conduction section is electrically connected to the relay electrode,
wherein the protrusion of the first insulating film is pillar-shaped having an upper surface nearest to the pixel electrode, and a pair of side surfaces sloping from the upper surface away from the pixel electrode, and
wherein the conduction section of the conductive layer covers the upper surface and the pair of side surfaces of the protrusion.

2. The electro-optical device according to claim 1 , wherein a surface of the conduction section facing the pixel electrode and a surface of the second insulating film facing the pixel electrode make up a continuous surface.

3. A projection-type display device comprising:
the electro-optical device according to claim 2 ;
a light source unit emitting light to be incident on the electro-optical device; and
a projection optical system projecting light modulated by the electro-optical device.

4. The electro-optical device according to claim 1 , further comprising:
a capacity electrode layer provided between the conductive layer and the substrate; and
a dielectric layer provided between the capacity electrode layer and the conductive layer;
wherein a storage capacitance is formed by the capacity electrode layer, the dielectric layer, and the conductive layer.

5. The electro-optical device according to claim 4 , wherein the first insulating film is provided between the capacity electrode layer and the conductive layer, and an opening is provided in an area where the capacity electrode layer and the conductive layer overlap each other when viewed from above the one side of the substrate.

6. The electro-optical device according to claim 5 , wherein the conductive layer and capacity electrode layer are provided in an area that overlaps an area between the pixel electrode and another pixel electrode that is adjacent to the pixel electrode when viewed from above the one side of the substrate.

7. A projection-type display device comprising:
the electro-optical device according to claim 5 ;
a light source unit emitting light to be incident on the electro-optical device; and
a projection optical system projecting light modulated by the electro-optical device.

8. A projection-type display device comprising:
the electro-optical device according to claim 6 ;
a light source unit emitting light to be incident on the electro-optical device; and
a projection optical system projecting light modulated by the electro-optical device.

9. The electro-optical device according to claim 4 , wherein the protrusion is provided in a position that overlaps the capacity electrode layer when viewed from above the one side of the substrate.

10. A projection-type display device comprising:
the electro-optical device according to claim 9 ;
a light source unit emitting light to be incident on the electro-optical device; and
a projection optical system projecting light modulated by the electro-optical device.

11. A projection-type display device comprising:
the electro-optical device according to claim 4 ;
a light source unit emitting light to be incident on the electro-optical device; and
a projection optical system projecting light modulated by the electro-optical device.

12. The electro-optical device according to claim 1 , wherein a liquid crystal layer is provided between the substrate and an opposite substrate that is disposed opposite to the substrate.

13. A projection-type display device comprising:
the electro-optical device according to claim 12 ;
a light source unit emitting light to be incident on the electro-optical device; and
a projection optical system projecting light modulated by the electro-optical device.

14. A projection-type display device comprising:
the electro-optical device according to claim 1 ;
a light source unit emitting light to be incident on the electro-optical device; and
a projection optical system projecting light modulated by the electro-optical device.

15. An electronic device comprising the electro-optical device according to claim 1 .

16. An electro-optical device comprising:
a pixel electrode provided over one side of a substrate;
a conductive layer provided between the substrate and the pixel electrode, the conductive layer including a conduction section protruding toward the pixel electrode;
a relay electrode provided between the substrate and the conductive layer;
a first insulating film provided between the substrate and the pixel electrode, the first insulating film having a protrusion protruding toward the pixel electrode and an opening overlapping the relay electrode; and
a second insulating film provided between the conductive layer and the pixel electrode;
wherein the pixel electrode is electrically connected to the conduction section, and the conduction section is electrically connected to the relay electrode, and
a surface of the conduction section facing the pixel electrode and a surface of the second insulating film facing the pixel electrode make up a continuous surface.

17. An electro-optical device comprising:
a pixel electrode provided over one side of a substrate;
a conductive layer provided between the substrate and the pixel electrode, the conductive layer including a conduction section in contact with the pixel electrode;
a relay electrode provided between the substrate and the conductive layer;
a first insulating film provided between the substrate and the pixel electrode, the first insulating film having a protrusion protruding toward the pixel electrode and an opening overlapping the relay electrode; and
a second insulating film provided between the conductive layer and the pixel electrode;
wherein
the pixel electrode is electrically connected to the conductive layer, and the conductive layer is electrically connected to the relay electrode,
the conduction section overlaps the protrusion of the first insulating film, and
the conduction section contacts the pixel electrode in a region between the protrusion of the first insulating film and the pixel electrode.

Assignees

• Seiko Epson Corp

Inventors

• Ito Satoshi
• Egami Takafumi
• Sokabe Hidenori

Classifications

• H04N9/3102

  using two-dimensional electronic spatial light modulators (micromechanical modulators as such G02B26/0833; liquid crystal modulators as such G02F1/13) · CPC title

• G02F1/134309 Primary

  characterised by their geometrical arrangement · CPC title

• G02F2001/133357

  Physics · mapped topic

• G02F2001/13685

  Physics · mapped topic

• G02F1/133345 Primary

  Insulating layers (G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence) · CPC title