Micro lens array substrate, electro-optical device, and electronic apparatus

Patent metadata

Field	Value
Publication number	US-9983334-B2
Application number	US-201715795004-A
Country	US
Kind code	B2
Filing date	Oct 26, 2017
Priority date	Nov 1, 2012
Publication date	May 29, 2018
Grant date	May 29, 2018

Abstract

A micro lens array substrate includes a substrate including a plurality of concave portions arranged in a first direction and a second direction intersecting the first direction on one surface of the substrate, and a lens layer having a different refractive index from the substrate. The lens layer is formed on the one surface of the substrate to fill in the plurality of concave portions. The plurality of concave portions is continuous in at least one of the first direction and the second direction and is arranged to have a discontinuous part in the lens layer between two adjacent concave portions in a third direction intersecting the first and second directions. A first depth of a center of one concave portion from the discontinuous part is greater than a second depth of the discontinuous part from a surface of the lens layer.

First claim

What is claimed is:

1. A micro lens array substrate comprising:
a substrate having optical transparency, the substrate having a plurality of concave portions arranged in a first direction and a second direction intersecting the first direction on one surface of the substrate; and
a lens layer having optical transparency, the lens layer having a different refractive index from that of the substrate, and the lens layer being formed on the one surface of the substrate so as to fill in the plurality of concave portions and to cover a region where the plurality of concave portions is formed,
wherein the plurality of concave portions is arranged so as to be continuous in at least one of the first direction and the second direction,
wherein the plurality of concave portions is arranged so as to have a discontinuous part in the lens layer between two adjacent concave portions of the plurality of concave portions in a third direction, the third direction intersecting the first direction and the second direction, and
wherein a first depth of a center of one concave portion of the plurality of concave portions from the discontinuous part is greater than a second depth of the discontinuous part from a surface of the lens layer.

2. The micro lens array substrate according to claim 1 , wherein
a third depth of the lens layer at a border between the two adjacent concave portions from the surface of the lens layer is greater than a fourth depth of a center of one concave portion from the border between the two adjacent concave portions.

3. The micro lens array substrate according to claim 1 , further comprising:
a transistor having a channel region that is provided over the one surface of the substrate; and
a light blocking layer that is provided between the lens layer and the transistor so as to overlap at least the channel region of the transistor when viewed in plan view,
wherein the discontinuous part is provided so as to overlap the light blocking layer when viewed in plan view.

4. The micro lens array substrate according to claim 1 ,
wherein the lens layer has a through-hole in the discontinuous part, when viewed in plan view, the through-hole extending to the substrate.

5. The micro lens array substrate according to claim 1 ,
wherein the lens layer includes a groove portion between two adjacent concave portions of the plurality of concave portions, a part of the groove portion extending to the substrate in the discontinuous part when viewed in plan view.

6. The micro lens array substrate according to claim 4 , further comprising:
a transparent layer having optical transparency,
wherein
the transparent layer is formed so as to fill in the through-hole,
the transparent layer is formed so as to have a same refractive index as the lens layer, and
a heat resistance of the transparent layer is higher than a heat resistance of the lens layer.

7. An electro-optical device comprising:
the micro lens array substrate according to claim 1 .

8. An electronic apparatus comprising:
the electro-optical device according to claim 7 .

9. The micro lens array substrate according to claim 5 , further comprising:
a transparent layer having optical transparency,
wherein
the transparent layer is formed so as to fill in the groove portion,
the transparent layer is formed so as to have a same refractive index as the lens layer, and
a heat resistance of the transparent layer is higher than a heat resistance of the lens layer.

Assignees

• Seiko Epson Corp

Inventors

• Nimura Toru

Classifications

• G02F2001/133565

  Physics · mapped topic

• G02F1/136286

  Wiring, e.g. gate line, drain line · CPC title

• G03B21/006

  using LCD's · CPC title

• G02B3/0056

  arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses (G02B3/0043 takes precedence; miniaturised objectives for electronic devices employing wafer level optics G02B13/0085) · CPC title

• G02B27/149

  using crossed beamsplitting surfaces, e.g. cross-dichroic cubes or X-cubes · CPC title