IP Library Granted Patent US 8,934,069
Granted Patent B2
US 8,934,069 · App. 13/086,431 · Granted Jan 13, 2015

Liquid crystal display device

Inventor: Shigeki Nishizawa (Mobara, JP)
Assignees: Japan Display Inc.; Panasonic Liquid Crystal Display Co., Ltd.
G02F1/136209G02F1/133553G02F1/134363
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Quick Facts
Patent No.
US 8,934,069
App. No.
13/086,431
Granted
Jan 13, 2015
Kind
B2
Abstract

Provided is a liquid crystal display device which includes: a pair of transparent substrates which are arranged to face each other in an opposed manner with a liquid crystal layer sandwiched therebetween; a non-self-luminous display part having at least a light transmitting region which allows light to pass therethrough and a light shielding region which shields light; and a backlight part, wherein the transparent substrate arranged on a backlight part side includes a reflection film formed of a metal thin film in which an opening region corresponding to the light transmitting region is formed on a liquid crystal layer side of the transparent substrate on the backlight part side, and the backlight light incident on the opening region passes through the opening region, and the backlight light incident on a region where the reflection film is formed is reflected toward the backlight part side.

Claims (17)

1. A liquid crystal display device comprising:

a pair of transparent substrates which are arranged to face each other in an opposed manner with a liquid crystal layer sandwiched therebetween;

a non-self-luminous display part having at least light transmitting regions which allow light to pass therethrough and a light shielding region which shields light; and

a backlight part which irradiates backlight light from a back surface side of the non-self-luminous display part; wherein

the pair of transparent substrates comprises a first substrate which is arranged on a backlight part side and a second substrate which faces the first substrate,

the first substrate includes a reflection film formed of a metal thin film, the reflection film being formed on a liquid crystal layer side of the first substrate,

opening regions corresponding to the light transmitting regions are formed in the reflection film,

the backlight light which is incident on the opening region passes through the opening region and reaches the liquid crystal layer side, and the backlight light which is incident on a region where the reflection film is formed is reflected toward the backlight part side, and

the first substrate has polarization members for reflecting or absorbing an S-wave component of the backlight light and for allowing the transmission of a P-wave component therethrough in the opening regions, the polarization members being respectively arranged inside of the opening regions so as not to overlap the reflection film.

2. The liquid crystal display device according to claim 1 , wherein the opening regions where the polarizer members are formed and the region where the reflection film is formed are formed alternately and adjacent to each other.

3. The liquid crystal display device according to claim 1 , wherein the polarization members include a plurality of columnar bodies which are formed using a non-transmitting thin film material and have a predetermined thickness, and the columnar bodies are formed at predetermined intervals by in-print printing.

4. The liquid crystal display device according to claim 1 , wherein at least one of a silicon-oxide based protective film and a silicon-nitride based protective film is provided between the first substrate and the reflection film.

5. The liquid crystal display device according to claim 1 , wherein the reflection film is fixed to a predetermined potential.

6. The liquid crystal display device according to claim 1 , wherein the reflection film is directly formed over a liquid-crystal-layer-side surface of the first substrate.

7. The liquid crystal display device according to claim 1 , wherein the first substrate includes a plurality of drain lines and a plurality of gate lines intersecting the drain lines and define regions surrounded by the drain lines and the gate lines as regions of pixels, and the second substrate has color filters of red, green and blue corresponding to regions of the pixels formed thereon.

8. The liquid crystal display device according to claim 1 , wherein the first substrate has wire grid polarization members in the opening regions, and

the wire grid polarizers have a polarization function.

Assignments (5)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 10, 2025
From: JAPAN DISPLAY INC
To: MAGNOLIA PURPLE CORPORATION
Reel/Frame 071890/0202 →
NUNC PRO TUNC ASSIGNMENT Recorded Nov 17, 2023
From: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
To: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
Reel/Frame 065615/0327 →
CHANGE OF NAME Recorded Feb 3, 2014
From: HITACHI DISPLAYS, LTD.
To: JAPAN DISPLAY EAST, INC.
Reel/Frame 032151/0797 →
CHANGE OF NAME Recorded Feb 3, 2014
From: JAPAN DISPLAY EAST, INC.
To: JAPAN DISPLAY INC.
Reel/Frame 032152/0133 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 28, 2011
From: NISHIZAWA, SHIGEKI
To: HITACHI DISPLAYS, LTD.; PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
Reel/Frame 026511/0996 →
Priority Claims (1)
JP 2010-095109 · Apr 16, 2010 · national
Continuity (1)
Related Publication 20110255028A1 · Oct 20, 2011