Liquid-crystal display device

Patent metadata

Field	Value
Publication number	US-9019451-B2
Application number	US-201013499999-A
Country	US
Kind code	B2
Filing date	May 20, 2010
Priority date	Oct 7, 2009
Publication date	Apr 28, 2015
Grant date	Apr 28, 2015

Abstract

A liquid crystal display (LCD) device includes a birefringent layer that satisfies the relationship nx>ny≧nz and may be considered a first-class birefringent layer, a birefringent layer that satisfies the relationship nx<ny≦nz may be considered a second-class birefringent layer, and a birefringent layer that satisfies the relationship nx≅ny≧nz may be considered a third-class birefringent layer. The LCD may include a first polarizer, a first first-class birefringent layer whose in-plane phase difference is adjusted to a quarter wave, an LC cell, a second first-class birefringent layer whose Nz factor is substantially the same as the first first-class birefringent layer and whose in-plane phase difference is adjusted to a quarter wave, a second-class birefringent layer, and a second polarizer which may be stacked in this order.

First claim

The invention claimed is:

1. A liquid-crystal display device,
in which a birefringent layer that satisfies the relationship nx>ny≧nz is defined as a first-class birefringent layer,
a birefringent layer that satisfies the relationship nx<ny≦nz is defined as a second-class birefringent layer, and
a birefringent layer that satisfies the relationship nx≅ny≧nz is defined as a third-class birefringent layer, the liquid-crystal display device comprising:
a first polarizer;
a firs…

Assignees

• Sakai Akira
• Sakuragi Kazuyoshi
• Hasegawa Masahiro
• Sharp Kk

Inventors

• Sakai Akira
• Sakuragi Kazuyoshi
• Hasegawa Masahiro

Classifications

• G02F2413/04

  Physics · mapped topic

• G02F2413/13

  Physics · mapped topic

• G02F2413/14

  Physics · mapped topic

• G02F1/133371 Primary

  Physics · mapped topic

• G02F1/13363 Primary

  Physics · mapped topic