Liquid crystal display device and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-9280017-B2
Application number	US-201314093361-A
Country	US
Kind code	B2
Filing date	Nov 29, 2013
Priority date	Nov 29, 2012
Publication date	Mar 8, 2016
Grant date	Mar 8, 2016

Abstract

Embodiments of the present invention provide a liquid crystal display device and a producing method thereof, and relate to the field of liquid crystal display. The liquid crystal display device of the present invention comprises a liquid crystal panel and a first optical compensation structure and a second optical compensation structure located at two sides of the liquid crystal panel, and the second optical compensation structure comprises: a polarizing film layer, a compensation film layer and a biaxial film layer, wherein, the polarizing film layer is located between the compensation film layer and the biaxial film layer; and the biaxial film layer is located between the polarizing film layer and the liquid crystal panel. Through providing the biaxial film layer in the second optical compensation structure, the present invention can effectively correct the color shift generated in the diagonal direction of the liquid crystal panel and improve the product quality.

First claim

What is claimed is:

1. A liquid crystal display device, comprising: a liquid crystal panel and a first optical compensation structure and a second optical compensation structure located at two sides of the liquid crystal panel respectively, the first optical compensation structure comprises a first compensation film layer, a second compensation film layer and a first polarizing film layer located between the first compensation film layer and the second compensation film layer, wherein, the second optical compensation structure comprises: a polarizing film layer, a compensation film layer and a biaxial film layer, wherein,
the polarizing film layer is located between the compensation film layer and the biaxial film layer;
the biaxial film layer is located between the polarizing film layer and the liquid crystal panel;
wherein the second compensation film layer is located between the first polarizing film layer and the liquid crystal panel and
wherein the in-plane direction phase difference of the second compensation film layer and the thickness direction phase difference of the second compensation film layer are both 0 nm.

2. The liquid crystal display device according to claim 1 , wherein, at least one of the first polarizing film layer and the polarizing film layer is a polyvinyl alcohol thin film; and at least one of the first compensation film layer, the second compensation film layer and the compensation film layer is a cellulose triacetate thin film.

3. The liquid crystal display device according to claim 1 , wherein, the in-plane direction phase difference of the biaxial film layer is within the ranges from 200 nm to 300 nm; and
the thickness direction phase difference of the biaxial film layer is within the ranges from 100 nm to 150 nm.

4. The liquid crystal display device according to claim 3 , wherein, the in-plane direction phase difference of the biaxial film layer is 274 nm, and the thickness direction phase difference of the biaxial film layer is 138 nm.

5. The liquid crystal display device according to claim 1 , wherein, the in-plane direction phase difference of the biaxial film layer is 274 nm, and the thickness direction phase difference of the biaxial film layer is 138 nm.

6. A method for manufacturing a liquid crystal display device, comprising:
forming a first polarizing film layer between a first compensation film layer and a second compensation film layer arranged opposite to each other, to obtain a first optical compensation structure;
forming a polarizing film layer between a compensation film layer and a biaxial film layer arranged opposite to each other, to obtain a second optical compensation structure; and
disposing the first optical compensation structure and the second optical compensation structure at two sides of a liquid crystal panel respectively, so that the biaxial film layer is located between the polarizing film layer and the liquid crystal panel,
wherein the first optical compensation structure is disposed so that the second compensation film layer is located between the first polarizing film layer and the liquid crystal panel, and
wherein the in-plane direction phase difference of the second compensation film layer and the thickness direction phase difference of the second compensation film layer are both 0 nm.

7. The method according to claim 6 , wherein, the in-plane direction phase difference of the biaxial film layer is within the ranges from 200 nm to 300 nm; and
the thickness direction phase difference of the biaxial film layer is within the ranges from 100 nm to 150 nm.

8. The method according to claim 7 , wherein, the in-plane direction phase difference of the biaxial film layer is 274 nm, and the thickness direction phase difference of the biaxial film layer is 138 nm.

9. The method according to claim 6 , wherein, at least one of the first polarizing film layer and the polarizing film layer is a polyvinyl alcohol thin film; and at least one of the first compensation film layer, the second compensation film layer and the compensation film layer is a cellulose triacetate thin film.

Assignees

• Boe Technology Group Co Ltd
• Hefei Boe Optoelectronics Tech

Inventors

• Park Kuhyun

Classifications

• Y10T29/49904

  Assembling a subassembly, then assembling with a second subassembly · CPC title

• G02F1/134363

  for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS] · CPC title

• G02F2001/134372

  Physics · mapped topic

• G02F2413/12

  Biaxial compensators · CPC title

• G02F2413/04

  Number of plates greater than or equal to 4 · CPC title