Compensation structure for liquid crystal panels and the liquid crystal displays

Patent metadata

Field	Value
Publication number	US-2016124264-A1
Application number	US-201414399944-A
Country	US
Kind code	A1
Filing date	Nov 5, 2014
Priority date	Nov 5, 2014
Publication date	May 5, 2016
Grant date	—

Abstract

A compensation structure of liquid crystal panels is disclosed. The compensation structure includes a liquid crystal panel and a first polarizing film and a second polarizing film arranged on two opposite surfaces of the liquid crystal panel. The liquid crystal panel comprises a liquid crystal layer having a plurality of liquid crystal molecules. An anisotropy reflective index of the liquid crystal layer is Δn, the thickness of the liquid crystal layer is d, and a pretilt angle of the liquid crystal molecules is θ. The first compensation film is a biaxial compensation film, and an in-plane retardation value and a thickness retardation value of the first compensation film are respectively Ro1 and Rth1. The second compensation film is the single-axial compensation film, and the thickness retardation value of the second compensation film is Rth2, wherein: 324.3 nm≦Δn×d≦342.7 nm; 85°≦θ<90°; 55 nm≦Ro1≦78 nm; 208 nm≦Rth1≦293 nm; Y1 nm≦Rth2≦Y2 nm; Y1=0.001897×(Rth1) 2 −2.01×Rth1+438.7; and Y2=−0.005756×(Rth1) 2 +1.654×Rth1+55.7. In addition, a liquid crystal device including the above compensation structure is also disclosed.

First claim

What is claimed is:

1 . A compensation structure of liquid crystal panels, comprising:
a liquid crystal panel and a first polarizing film and a second polarizing film arranged on two opposite surfaces of the liquid crystal panel, the liquid crystal panel comprises a liquid crystal layer having a plurality of liquid crystal molecules, an anisotropy reflective index of the liquid crystal layer is Δn, the thickness of the liquid crystal layer is d, a pretilt angle of the liquid crystal molecules is θ, the first compensation film is a biaxial compensation film, an in-plane retardation value and a thickness retardation value of the first compensation film are respectively Ro1 and Rth1, the second compensation film is the single-axial compensation film, and the thickness retardation value of the second compensation film is Rth2, wherein:
324.3 nm≦Δ n×d≦ 342.7 nm;

85°≦θ<90°;

55 nm≦ Ro 1≦78 nm;

208 nm≦ Rth 1≦293 nm;

Y 1 nm≦ Rth 2≦ Y 2 nm;

Y 1=0.001897×( Rth 1) 2 −2.01× Rth 1+438.7;

Y 2=−0.005756×( Rth 1) 2 +1.654× Rth 1+55.7.

2 . The compensation structure as claimed in claim 1 , wherein 58 nm≦Ro1≦71 nm, and 220 nm≦Rth1≦269 nm.

3 . The compensation structure as claimed in claim 2 , wherein 44 nm≦Rth2≦139 nm.

4 . The compensation structure as claimed in claim 1 , wherein a first polarizing film and a first protection film are arranged on the first compensation film in turn, and a second polarizing film and a second protection film are arranged on the second compensation film in turn.

5 . The compensation structure as claimed in claim 4 , wherein the first polarizing film and the second polarizing film are made by Polyvinyl alcohol (PVA).

6 . The compensation structure as claimed in claim 4 , wherein the first protection film and the second protection film are made by Triacetyl Cellulose (TAC).

7 . The compensation structure as claimed in claim 4 , wherein an included angle between a light absorbing axis of the first polarizing film and a slow axis of the first compensation film is 90 degrees, and the included angle between the light absorbing axis of the second polarizing film and the slow axis of the second biaxial compensation film is 90 degrees.

8 . The compensation structure as claimed in claim 1 , wherein a first adhesive layer is arranged between the liquid crystal panel and the first compensation film, and a second adhesive layer is arranged between the liquid crystal panel and the second compensation film, and the first adhesive layer and the second adhesive layer are made by pressure sensitive adhesive (PSA).

9 . The compensation structure as claimed in claim 1 , wherein the liquid crystal panel is a vertical alignment mode.

10 . A liquid crystal device, comprising:
a liquid crystal panel and a backlight module arranged opposite to the liquid crystal display panel, the backlight module provides a light source to the liquid crystal display panel such that the liquid crystal display panel is capable of displaying images, the liquid crystal panel comprises a compensation structure, and the compensation structure comprises: a first polarizing film and a second polarizing film arranged on two opposite surfaces of the liquid crystal panel, the liquid crystal panel comprises a liquid crystal layer having a plurality of liquid crystal molecules, an anisotropy reflective index of the liquid crystal layer is Δn, the thickness of the liquid crystal layer is d, a pretilt angle of the liquid crystal molecules is θ, the first compensation film is a biaxial compensation film, an in-plane retardation value and a thickness retardation value of the first compensation film are respectively Ro1 and Rth1, the second compensation film is the single-axial compensation film, and the thickness retardation value of the second compensation film is Rth2, wherein:
324.3 nm≦Δ n×d≦ 342.7 nm;

85°≦θ<90°;

55 nm≦ Ro 1≦78 nm;

208 nm≦ Rth 1≦293 nm;

Y 1 nm≦ Rth 2≦ Y 2 nm;

Y 1=0.001897×( Rth 1) 2 −2.01× Rth 1+438.7;

Y 2=−0.005756×( Rth 1) 2 +1.654× Rth 1+55.7.

11 . The liquid crystal device as claimed in claim 10 , wherein 58 nm≦Ro1≦71 nm, and 220 nm≦Rth1≦269 nm.

12 . The liquid crystal device as claimed in claim 11 , wherein 44 nm≦Rth2≦139 nm.

13 . The liquid crystal device as claimed in claim 10 , wherein Ro1=Ro2 and Rth1=Rth2.

14 . The liquid crystal device as claimed in claim 13 , wherein the first polarizing film and the second polarizing film are made by Polyvinyl alcohol (PVA).

15 . The liquid crystal device as claimed in claim 13 , wherein the first protection film and the second protection film are made by Triacetyl Cellulose (TAC).

16 . The liquid crystal device as claimed in claim 13 , wherein an included angle between a light absorbing axis of the first polarizing film and a slow axis of the first compensation film is 90 degrees, and the included angle between the light absorbing axis of the second polarizing film and the slow axis of the second biaxial compensation film is 90 degrees.

17 . The liquid crystal device as claimed in claim 10 , wherein a first adhesive layer is arranged between the liquid crystal panel and the first compensation film, and a second adhesive layer is arranged between the liquid crystal panel and the second compensation film, and the first adhesive layer and the second adhesive layer are made by pressure sensitive adhesive (PSA).

18 . The liquid crystal device as claimed in claim 10 , wherein the liquid crystal panel is a vertical alignment mode.

Assignees

• Shenzhen China Star Optoelect

Inventors

• Hai Bo
• Kang Chih-Tsung

Classifications

• G02F1/13363 Primary

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

• G02F1/133528 Primary

  Polarisers · CPC title

• G02F2413/02

  Number of plates being 2 · CPC title

• G02F2202/40

  Materials having a particular birefringence, retardation · CPC title

• G02F2413/08

  with a particular optical axis orientation · CPC title