Display device

Patent metadata

Field	Value
Publication number	US-2015234215-A1
Application number	US-201414459463-A
Country	US
Kind code	A1
Filing date	Aug 14, 2014
Priority date	Feb 18, 2014
Publication date	Aug 20, 2015
Grant date	—

Abstract

Provided is a display device capable of preventing a liquid crystal from being left outside a microcavity. The display device includes: a substrate; a pixel electrode formed on the substrate; a roof layer formed on the pixel electrode so as to be spaced apart from the pixel electrode with a plurality of microcavities therebetween; a light blocking member positioned between two microcavities of the plurality of microcavities, overlapping with a first edge of one microcavity of the two microcavities, and not overlapping with a second edge of the other microcavity; an injection hole exposing a part of the microcavity; a liquid crystal layer filling the microcavity; and an encapsulation layer formed on the roof layer so as to cover the injection hole to seal the microcavity.

First claim

What is claimed is:

1 . A display device, comprising:
a substrate; a pixel electrode on the substrate; a roof layer on the pixel electrode and spaced apart from the pixel electrode, a plurality of microcavities defined between the pixel electrode and the roof layer, each of which comprises a first edge opposite to a second edge thereof; a light blocking member between two adjacent microcavities of the plurality of microcavities, overlapping the first edge of one microcavity of the two microcavities, and not overlapping the second edge of the other microcavity of the two microcavities; an injection hole exposing an inner area of a microcavity; a liquid crystal layer in the microcavity; and an encapsulation layer on the roof layer, which covers the injection hole and seals the microcavity.

2 . The display device of claim 1 , wherein:
the light blocking member is between the pixel electrode and the roof layer.

3 . The display device of claim 2 , further comprising:
a first alignment layer on the pixel electrode; a second alignment layer below the roof layer; and an alignment material column connecting the first alignment layer and the second alignment layer to each other.

4 . The display device of claim 3 , further comprising
a first injection hole at a side of the first edge of the microcavity, and a second injection hole at a side of the second edge of the microcavity.

5 . The display device of claim 4 , wherein:
the alignment material column is adjacent to the second injection hole.

6 . The display device of claim 5 , wherein:
the light blocking member overlaps the first injection hole.

7 . The display device of claim 6 , wherein:
the light blocking member does not overlap the second injection hole.

8 . The display device of claim 7 , wherein:
the light blocking member is spaced apart from the alignment material column in a plan view.

9 . The display device of claim 2 , wherein:
the light blocking member comprises a material having higher surface energy than that of the pixel electrode.

10 . The display device of claim 2 , further comprising:
a first insulating layer below the pixel electrode and the light blocking member.

11 . The display device of claim 10 , wherein:
the light blocking member comprises a material having higher surface energy than that of the first insulating layer.

12 . The display device of claim 1 , wherein:
the plurality of microcavities is in a matrix form in a plan view.

13 . The display device of claim 12 , wherein:
the two adjacent microcavities are vertically adjacent to each other.

14 . The display device of claim 1 , further comprising:
a thin film transistor connected with the pixel electrode, and between the two adjacent microcavities.

15 . The display device of claim 14 , wherein:
the light blocking member overlaps the thin film transistor.

16 . The display device of claim 1 , further comprising:
a common electrode below the roof layer.

17 . The display device of claim 1 , wherein:
the light blocking member contacts the liquid crystal layer.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Si Kwang
• Kim Tae Gyun
• Lee Hyoung Sub
• Sung Woo Yong
• Cha Tae Woon
• Choi Sang Gun

Classifications

• G02F1/1337

  Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers · CPC title

• G02F1/133512

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• G02F1/1341 Primary

  Filling or closing of cells · CPC title

• G02F1/133345

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

• G02F1/1368

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