Liquid crystal display panel and liquid crystal display device

Patent metadata

Field	Value
Publication number	US-9740049-B2
Application number	US-201314362014-A
Country	US
Kind code	B2
Filing date	Aug 22, 2013
Priority date	Mar 22, 2013
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

A liquid crystal display panel and a liquid crystal display device, the liquid crystal panel including a color filter sheet and a liquid crystal layer, an optical compensation film layer being disposed between the color filter sheet and the liquid crystal layer. With the optical compensation film layer inside the liquid crystal panel, contrast ratio is increased in a full-viewing-angle direction, and color shift in a diagonal direction of the liquid crystal pane is alleviated; further, the optical compensation film layer is provided on the color filter sheet of the liquid crystal panel, leading to a compact structure of the liquid crystal panel, reducing production costs and decreasing light leakage and mura phenomenon that are caused by light reflection and refraction; gray level, contrast ratio, color phase or the like of an LCD can be also improved.

First claim

The invention claimed is:

1. A liquid crystal panel, comprising a color filter sheet and a liquid crystal layer, wherein an optical compensation film layer is disposed between the color filter sheet and the liquid crystal layer;
wherein the optical compensation film layer comprises a C-plate compensation film and an A-plate compensation film, and the optical compensation film layer is provided on a lower surface of the color filter sheet, the C-plate compensation film being provided between the color filter sheet and the A-plate compensation film;
the vertical phase delay Rth of the C-plate compensation film is 138 nm; and the horizontal phase delay Re of the A-plate compensation film is 274 nm;
wherein the liquid crystal panel further comprises an upper polarizer and a lower polarizer respectively provided on two sides of the liquid crystal layer;
the upper polarizer comprises an upper polarizer polarizing thin film and an upper polarizer inner cellulose triacetate thin film, the upper polarizer inner cellulose triacetate thin film being provided between the upper polarizer polarizing thin film and the color filter sheet, a vertical phase delay Rth of the upper polarizer inner cellulose triacetate thin film being 0 nm, a horizontal phase delay Re of the upper polarizer inner cellulose triacetate thin film being 0 nm;
the lower polarizer comprises a lower polarizer polarizing thin film and a lower polarizer inner cellulose triacetate thin film, the lower polarizer inner cellulose triacetate thin film being provided between the lower polarizer polarizing thin film and the liquid crystal layer, a vertical phase delay Rth of the lower polarizer inner cellulose triacetate thin film being 0 nm, a horizontal phase delay of the lower polarizer inner cellulose triacetate thin film being 0 nm;
a range of a phase delay Δnd of the liquid crystal layer is from 320 to 420 nm.

2. The liquid crystal panel as claimed in claim 1 , wherein the phase delay Δnd of the liquid crystal layer is 392.7 nm.

3. A liquid crystal display device, comprising a liquid crystal panel according to claim 1 .

4. The liquid crystal device as claimed in claim 3 , wherein the phase delay Δnd of the liquid crystal layer is 392.7 nm.

Assignees

• Boe Technology Group Co Ltd
• Hefei Boe Optoelectronics Tech

Inventors

• Jin Ji
• Park Ku Hyun

Classifications

• G02F2001/133565

  Physics · mapped topic

• G02F2001/133631

  Physics · mapped topic

• G02F1/133634

  the refractive index Nz perpendicular to the element surface being different from in-plane refractive indices Nx and Ny, e.g. biaxial or with normal optical axis · CPC title

• G02B5/3041

  comprising multiple thin layers, e.g. multilayer stacks · CPC title

• G02B5/3083 Primary

  Birefringent or phase retarding elements (G02B5/3008, G02B5/3016 take precedence; systems for polarisation control G02B27/286; manufacturing phase modulating patterns by lithographic processes G03F7/001) · CPC title