Display device

Patent metadata

Field	Value
Publication number	US-10078243-B2
Application number	US-201715605396-A
Country	US
Kind code	B2
Filing date	May 25, 2017
Priority date	Jun 3, 2016
Publication date	Sep 18, 2018
Grant date	Sep 18, 2018

Abstract

A display device that is suitable for high definition and a method for manufacturing thereof are provided. The display device includes a reflective liquid crystal element. A liquid crystal layer has a first portion overlapping with a reflective electrode that reflects visible light and blocks ultraviolet light, and a second portion overlapping with a region between two adjacent reflective electrodes. The first portion contains a monomer and liquid crystal and the second portion contains a polymer obtained by polymerization of the monomer. In the second portion, the polymer constitutes the framework of a columnar partition wall which bonds a pair of substrates to each other. The partition wall can be formed in a self-aligned manner by using the reflective electrode as a light-blocking mask at the irradiation with light. The polymer is positioned to fit a depression portion of an insulating layer over which the reflective electrode is provided.

First claim

What is claimed is:

1. A display device comprising:
an insulating layer;
a first electrode over the insulating layer;
a liquid crystal layer over the first electrode, the liquid crystal layer comprising a first portion and a second portion;
a light-blocking layer over the liquid crystal layer;
a structure body in contact with the second portion; and
a first alignment film and a second alignment film which are in contact with the second portion,
wherein the first electrode is configured to reflect visible light and block ultraviolet light,
wherein the first portion overlaps with the first electrode,
wherein the second portion, the light-blocking layer, and the structure body overlap with each other,
wherein the first portion comprises a monomer and a liquid crystal,
wherein the second portion comprises a polymer, and
wherein the first portion and the second portion are horizontally adjacent to each other.

2. The display device according to claim 1 , wherein the second portion is surrounded by part of the first portion.

3. The display device according to claim 1 , wherein the polymer is obtained by polymerization of the monomer.

4. The display device according to claim 1 ,
wherein the structure body is in contact with at least one of the first alignment film and the second alignment film.

5. A display device comprising:
an insulating layer comprising a depression portion;
a first electrode and a second electrode over the insulating layer;
a liquid crystal layer over the first electrode and the second electrode, the liquid crystal layer comprising a first portion and a second portion;
a light-blocking layer over the liquid crystal layer;
a structure body in contact with the second portion; and
a first alignment film and a second alignment film which are in contact with the second portion,
wherein each of the first electrode and the second electrode is configured to reflect visible light and block ultraviolet light,
wherein the first portion overlaps with the first electrode,
wherein the second portion, the light-blocking layer, the depression portion, and the structure body overlap with each other,
wherein the first portion comprises a monomer and a liquid crystal,
wherein the second portion comprises a polymer,
wherein the first electrode and the second electrode do not overlap with the depression portion, and
wherein the first portion and the second portion are horizontally adjacent to each other.

6. The display device according to claim 5 , wherein the second portion is surrounded by part of the first portion.

7. The display device according to claim 5 , wherein the polymer is obtained by polymerization of the monomer.

8. The display device according to claim 5 ,
wherein the structure body is in contact with at least one of the first alignment film and the second alignment film.

9. A display device comprising:
an insulating layer over a first substrate, the insulating layer comprising a depression portion;
a first electrode and a second electrode over the insulating layer;
a liquid crystal layer over the first electrode and the second electrode, the liquid crystal layer comprising a first portion and a second portion;
a third electrode over the liquid crystal layer;
a light-blocking layer over the third electrode;
a second substrate over the light-blocking layer; and
a structure body in contact with the second portion; and
a first alignment film and a second alignment film which are in contact with the second portion,
wherein each of the first electrode and the second electrode is configured to reflect visible light and block ultraviolet light,
wherein the first portion overlaps with the first electrode,
wherein the second portion, the light-blocking layer, the depression portion, and the structure body overlap with each other,
wherein the first portion comprises a monomer and a liquid crystal,
wherein the second portion comprises a polymer,
wherein the first electrode and the second electrode do not overlap with the depression portion,
wherein each of the first substrate and the second substrate has flexibility, and
wherein the first portion and the second portion are horizontally adjacent to each other.

10. The display device according to claim 9 , wherein the second portion is surrounded by part of the first portion.

11. The display device according to claim 9 , wherein the polymer is obtained by polymerization of the monomer.

12. The display device according to claim 9 ,
wherein the structure body is in contact with at least one of the first alignment film and the second alignment film.

13. The display device according to claim 9 , further comprising:
a light-emitting element comprising a fourth electrode transmitting visible light, a layer containing a light-emitting substance, and a fifth electrode,
wherein the insulating layer is positioned between the light-emitting element and the liquid crystal layer, and
wherein the light-emitting element is configured to emit light to the insulating layer side.

14. The display device according to claim 9 , further comprising:
a light-emitting element comprising a fourth electrode transmitting visible light, a layer containing a light-emitting substance, and a fifth electrode;
a first transistor electrically connected to the first electrode; and
a second transistor electrically connected to the fourth electrode.

Assignees

• Semiconductor Energy Lab

Inventors

• Kubota Daisuke
• Nakano Masaru

Classifications

• G02F1/1368

  in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} · CPC title

• G02F1/1339 Primary

  Gaskets; Spacers; Sealing of cells · CPC title

• G02F1/133345

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

• G02F1/133711

  by organic films, e.g. polymeric films · CPC title

• G02F1/133305

  Flexible substrates, e.g. plastics, organic film · CPC title