Display device having a polarizer absorption axis which is parallel to a direction of initial alignment of liquid crystal molecules

Patent metadata

Field	Value
Publication number	US-9874781-B2
Application number	US-201514838573-A
Country	US
Kind code	B2
Filing date	Aug 28, 2015
Priority date	Sep 1, 2014
Publication date	Jan 23, 2018
Grant date	Jan 23, 2018

Abstract

According to one embodiment, a liquid crystal display device includes an array substrate, a counter-substrate, a negative liquid crystal layer including liquid crystal molecules, a retardation film attached to a surface of the array substrate, a first polarizer attached to the retardation film and having a first absorption axis, a second polarizer attached to a surface of the counter-substrate, and having a second absorption axis which is parallel to a direction of initial alignment of the liquid crystal molecules and perpendicular to the first absorption axis, a cover member located opposite to the second polarizer, and ultraviolet curing resin which bonds the second polarizer and the cover member to each other.

First claim

What is claimed is:

1. A liquid crystal display device comprising:
an array substrate;
a counter-substrate located opposite to the array substrate;
a negative liquid crystal layer including liquid crystal molecules and held between the array substrate and the counter-substrate;
a retardation film attached to a surface of the array substrate;
a first polarizer attached to the retardation film and having a first absorption axis;
a second polarizer attached to a surface of the counter-substrate, and having a second absorption axis which is parallel to a direction of initial alignment of the liquid crystal molecules and perpendicular to the first absorption axis;
a cover member located opposite to the second polarizer; and
ultraviolet curing resin bonding the second polarizer and the cover member to each other,
the array substrate further comprising a gate line extending parallel to the second absorption axis, a first electrode, an insulating film covering the first electrode, and a second electrode located on the insulating film and opposite to the first electrode, the second electrode including a first slit extending in a first extension direction crossing the direction of the initial alignment.

2. The liquid crystal display device of claim 1 , wherein the ultraviolet curing resin is in contact with a surface and side surfaces of the second polarizer.

3. The liquid crystal display device of claim 2 , wherein the ultraviolet curing resin is in contact with part of the counter-substrate which is exposed from the second polarizer to an outside thereof.

4. The liquid crystal display device of claim 1 , wherein the second absorption axis is parallel to short sides of an active area for use in displaying an image.

5. The liquid crystal display device of claim 1 , wherein the cover member comprises a touch sensor located on the ultraviolet curing resin.

6. The liquid crystal display device of claim 1 , wherein the array substrate further comprises a third electrode which is located adjacent to the second electrode and opposite to the first electrode, and which includes a second slit extending in a second extension direction different from the first extension direction, and the second electrode and the third electrode are disposed in adjacent pixels which take on the same color.

7. The liquid crystal display device of claim 6 , wherein an angle between the first extension direction and the direction of the initial alignment is equal to that between the second extension direction and the direction of the initial alignment.

8. The liquid crystal display device of claim 7 , wherein the angle between the first extension direction and the direction of the initial alignment is greater than 45° and less than 90°.

Assignees

• Japan Display Inc

Inventors

• Tago Keiji

Classifications

• G02F2001/133331

  Physics · mapped topic

• G02F2413/05

  Single plate on one side of the LC cell · CPC title

• G02F2202/28

  Adhesive materials or arrangements · CPC title

• G02F1/13363 Primary

  Birefringent elements, e.g. for optical compensation · CPC title

• G02F1/133308

  Support structures for LCD panels, e.g. frames or bezels · CPC title