Curved liquid crystal display

Patent metadata

Field	Value
Publication number	US-10371988-B2
Application number	US-201715839755-A
Country	US
Kind code	B2
Filing date	Dec 12, 2017
Priority date	Dec 10, 2014
Publication date	Aug 6, 2019
Grant date	Aug 6, 2019

Abstract

A curved liquid crystal display including a first curved substrate; a second curved substrate; a liquid crystal layer including liquid crystal molecules having negative dielectric anisotropy, the liquid crystal layer being interposed between the first and second curved substrates; a first curved liquid crystal alignment layer interposed between the liquid crystal layer and the first curved substrate; and a second curved liquid crystal alignment layer interposed between the liquid crystal layer and the second curved substrate. The second curved liquid crystal alignment layer has an average value of surface roughness values greater than an average value of surface roughness values of the first curved liquid crystal alignment layer.

First claim

What is claimed is:

1. A curved liquid crystal display comprising:
a first curved substrate;
a second curved substrate;
a liquid crystal layer comprising liquid crystal molecules having negative dielectric anisotropy, the liquid crystal layer being interposed between the first curved substrate and the second curved substrate;
a first curved liquid crystal alignment layer interposed between the liquid crystal layer and the first curved substrate; and
a second curved liquid crystal alignment layer which has an average value of surface roughness values greater than an average value of surface roughness values of the first curved liquid crystal alignment layer, the second curved liquid crystal alignment layer being interposed between the liquid crystal layer and the second curved substrate,
wherein each of the first and second curved liquid crystal alignment layers comprises protrusions resulting from a light polymerization reaction of reactive mesogens in various sizes such that an average number of the protrusions protruded from one side of the second curved liquid crystal alignment layer is greater than an average number of the protrusions protruded from one side of the first curved liquid crystal alignment layer.

2. The curved liquid crystal display of claim 1 , further comprising:
a patternless electrode interposed between the first curved substrate and the first curved liquid crystal alignment layer; and
a patterned electrode interposed between the second curved liquid crystal alignment layer and the second curved substrate, the patterned electrode comprising a slit pattern.

3. The curved liquid crystal display of claim 1 , wherein a number of the polymerized reactive mesogens in the second curved liquid crystal alignment layer is greater than a number of the polymerized reactive mesogens in the first curved liquid crystal alignment layer.

4. The curved liquid crystal display of claim 1 , wherein the liquid crystal molecules having negative dielectric anisotropy comprise a first liquid crystal molecule and a second liquid crystal molecule having a pre-tilt angle smaller than a pre-tilt angle of the first liquid crystal molecule.

5. The curved liquid crystal display of claim 1 , wherein a difference (mθ 1 -mθ 2 ) between an average value (mθ 1 ,) of the pre-tilt angle (θ 1 ) of the first liquid crystal molecule and an average value (mθ 2 ) of the pre-tilt angle (θ 2 ) of the second liquid crystal molecule ranges from 0.5° to 1.5°.

Assignees

• Samsung Display Co Ltd

Inventors

• Song Dong Han
• Kwon Oh Jeong
• Kim Su Jin
• Kim Jin Won
• Shin Ki Chul
• Shin Dong Chul
• Yun Sung Jae
• Lee Hyeok Jin

Classifications

• G02F2001/133397

  Physics · mapped topic

• G02F2001/133337

  Physics · mapped topic

• G02F1/133723

  Polyimide, polyamide-imide · CPC title

• G02F1/133707 Primary

  Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes · CPC title

• G02F2001/133773

  Physics · mapped topic