Liquid crystal display device

Patent metadata

Field	Value
Publication number	US-2016161801-A1
Application number	US-201615015664-A
Country	US
Kind code	A1
Filing date	Feb 4, 2016
Priority date	Aug 12, 2013
Publication date	Jun 9, 2016
Grant date	—

Abstract

Provided is a liquid crystal display device including a viewer-side polarizing plate 1 , a liquid crystal cell 11 , a backlight-side polarizing plate 21 , and a backlight unit 31 ; in which a three-wavelength (RGB) backlight light source having a narrow half bandwidth of the light emission intensity spectrum is used, and the viewer-side polarizing plate includes, for example, a first absorption material which has a maximum value of absorbance in a wavelength range of 470 nm to 510 nm and has a peak of the absorbance full width at half maximum of which is 50 nm or lower.

First claim

What is claimed is:

1 . A liquid crystal display device comprising:
a viewer-side polarizing plate; a liquid crystal cell; a backlight-side polarizing plate; and a backlight unit, wherein the backlight unit emits blue light which has a light emission central wavelength in a wavelength range of 430 nm to 470 nm and has a full width at half maximum of a light emission intensity of 50 nm or lower, green light which has a light emission central wavelength in a wavelength range of 510 nm to 560 nm and has full width at half maximum of a light emission intensity of 50 nm or lower, and red light which has a light emission central wavelength in a wavelength range of 610 nm to 660 nm and has a full width at half maximum of a light emission intensity of 50 nm or lower, and the viewer-side polarizing plate includes at least one of a first absorption material which has a maximum value of absorbance in a wavelength range of 470 nm to 510 nm and has a peak of the absorbance a full width at half maximum of which is 50 nm or lower, and a second absorption material which has a maximum value of absorbance in a wavelength range of 560 nm to 610 nm and has a peak of the absorbance a full width at half maximum of which is 50 nm or lower.

2 . The liquid crystal display device according to claim 1 ,
wherein the viewer-side polarizing plate preferably includes both the first absorption material and the second absorption material.

3 . The liquid crystal display device according to claim 1 ,
wherein the viewer-side polarizing plate includes at least a polarizer and a surface film disposed on a surface of the polarizer on a side opposite to the liquid crystal cell, and at least one of the surface film and the polarizer includes at least one of the first absorption material and the second absorption material.

4 . The liquid crystal display device according to claim 3 , further comprising:
at least one of the first absorption material and the second absorption material on the surface film.

5 . The liquid crystal display device according to claim 1 ,
wherein the backlight unit includes a blue light-emitting diode that emits the blue light and a quantum dot member that emits the green light and the red light when the blue light from the blue light-emitting diode enters.

6 . The liquid crystal display device according to claim 1 ,
wherein the backlight unit includes a blue light laser that emits the blue light, a green light laser that emits the green light, and a red light laser that emits the red light.

Assignees

• Fujifilm Corp

Inventors

• Watano Akiko
• Saitoh Yukito
• Ohmuro Katsufumi
• Ichihashi Mitsuyoshi

Classifications

• G02F1/133603

  with LEDs · CPC title

• G02F1/133621

  providing coloured light (G02F1/133617, G02F1/133533 take precedence) · CPC title

• G02F2001/133567

  Physics · mapped topic

• G02F1/133533 Primary

  Colour selective polarisers (G02F1/1347 takes precedence) · CPC title

• G02F2001/133614

  Physics · mapped topic