Substrate for electro-optical apparatus, electro-optical apparatus, and electronic equipment with improved light efficiency and contrast

Patent metadata

Field	Value
Publication number	US-9331099-B2
Application number	US-201414450641-A
Country	US
Kind code	B2
Filing date	Aug 4, 2014
Priority date	Aug 8, 2013
Publication date	May 3, 2016
Grant date	May 3, 2016

Abstract

An element substrate is provided with a substrate; a pixel electrode; a light shielding layer which is disposed between the substrate and the pixel electrode and has an opening in an area overlapping with the pixel electrode; a TFT that is disposed between the light shielding layer and the pixel electrode has a channel area which is disposed in an area overlapping with the light shielding layer; a light shielding layer that is disposed between the TFT and the pixel electrode and has an opening in an area overlapping with the pixel electrode; a micro lens that is disposed between the substrate and the light shielding layer and disposed in an area overlapping with the pixel electrode; and a micro lens that is disposed between the light shielding layer and the pixel electrode and disposed in an area overlapping with the pixel electrode.

First claim

What is claimed is:

1. A substrate for electro-optical apparatus comprising:
a first substrate;
a pixel electrode;
a switching element that is provided between the first substrate and the pixel electrode so as to correspond to the pixel electrode, and includes a semiconductor layer having a channel area;
a first light shielding layer that is provided between the first substrate and the switching element, has an opening in an area overlapping with the pixel electrode in planar view, and is disposed in an area overlapping with the channel area;
a second light shielding layer that is provided between the switching element and the pixel electrode, has an opening in an area overlapping with the pixel electrode in planar view, and is disposed in the area overlapping with the channel area;
a first lens that is disposed between the first substrate and the first light shielding layer, and is disposed in an area overlapping with the pixel electrode in planar view; and
a second lens that is disposed between the second light shielding layer and the pixel electrode, and is disposed in an area overlapping with the pixel electrode in planar view,
wherein
the first lens has positive refractive power, and
the second lens has positive refractive power when a focus of the first lens is positioned closer to a first substrate side than the second lens and has negative refractive power when the focus of the first lens is positioned closer to a pixel electrode side than the second lens.

2. The substrate for electro-optical apparatus according to claim 1 ,
wherein the pixel electrode in a planar shape is formed into a substantially rectangular shape, and
a contact portion for electrically connecting the pixel electrode to the switching element is disposed in a corner of the pixel electrode in planar view.

3. The substrate for electro-optical apparatus according to claim 2 , further comprising:
a relay electrode that is provided between the contact portion and the switching element,
wherein the relay electrode is disposed on the same layer as the second lens or disposed closer to the pixel electrode side than the second lens.

4. The substrate for electro-optical apparatus according to claim 3 ,
wherein the relay electrode is disposed in the corner of the pixel electrode in planar view.

5. The substrate for electro-optical apparatus according to claim 2 ,
wherein the second lens is thinner than the first lens.

6. The substrate for electro-optical apparatus according to claim 2 ,
wherein a distance between the second light shielding layer and the second lens is smaller than a distance between the first light shielding layer and the first lens.

7. The substrate for electro-optical apparatus according to claim 2 ,
wherein a diameter of the first lens is equal to or larger than that of the second lens.

8. The substrate for electro-optical apparatus according to claim 1 , further comprising:
a second substrate,
wherein the first lens is provided on the first substrate,
the first light shielding layer, the switching element, the second light shielding layer, and the second lens are disposed on the second substrate, and
the first substrate and the second substrate are joined to each other via an adhesive layer which is disposed between the first lens and the second substrate.

9. An electro-optical apparatus including the substrate for the electro-optical apparatus as an element substrate according to claim 1 , the apparatus comprising:
the element substrate disposed on a light incident side;
a counter substrate disposed to face the element substrate and provided with a common electrode on a surface of the element substrate side; and
an electro-optical layer disposed between the element substrate and the counter substrate.

10. Electronic equipment including the electro-optical apparatus according to claim 9 .

11. The substrate for electro-optical apparatus according to claim 1 ,
wherein a focus of the second lens is positioned closer to the pixel electrode side than the first lens when the second lens has positive refractive power.

12. An electro-optical apparatus comprising:
a pixel electrode;
a switching element that is provided to correspond to the pixel electrode and includes a semiconductor film having a channel area;
a first light shielding layer that is provided on a side of the switching element opposite to the pixel electrode and disposed so as to overlap with the channel area;
a second light shielding layer that is provided between the switching element and the pixel electrode and disposed so as to overlap with the channel area in planar view;
a first lens that is provided on a side of the first light shielding layer opposite to the switching element and disposed so as to overlap with the pixel electrode in planar view; and
a second lens that is provided between the second light shielding layer and the pixel electrode and disposed so as to overlap with the pixel electrode in planar view,
wherein
the first lens has positive refractive power, and
the second lens has positive refractive power when a focus of the first lens is positioned closer to a switching element side than the second lens and has negative refractive power when the focus of the first lens is positioned closer to a pixel electrode side than the second lens.

Assignees

• Seiko Epson Corp

Inventors

• Nimura Toru

Classifications

• G02F1/136227

  Through-hole connection of the pixel electrode to the active element through an insulation layer · CPC title

• G02F1/133526

  Lenses, e.g. microlenses or Fresnel lenses · CPC title

• G02F1/136209

  Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element · CPC title

• H10D86/441

  Interconnections, e.g. scanning lines · CPC title

• H10D86/411

  characterised by materials, geometry or structure of the substrates · CPC title