IP Library Granted Patent US 9,058,784
Granted Patent B2
US 9,058,784 · App. 13/699,396 · Granted Jun 16, 2015

Liquid crystal display device

Inventors: Masayuki Takahashi (Osaka, JP); Akihiko Inoue (Osaka, JP); Osamu Teranuma (Osaka, JP)
Assignee: Sharp Kabushiki Kaisha
G09G3/3611G09G3/003G09G2320/0209G09G2320/0252G09G2320/0673H04N13/0438H04N13/0452H04N13/0422
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Quick Facts
Patent No.
US 9,058,784
App. No.
13/699,396
Granted
Jun 16, 2015
Kind
B2
Abstract

A liquid crystal display device for carrying out a 3D display by a frame sequential method as well as a 2D display includes: a digital γ correction section for changing an input gray level to a gamma characteristic corresponding to either the 2D display or the 3D display in accordance with a preset analog gamma value; an overdrive circuit for finding, in accordance with a parameter set according to the gamma characteristic thus corrected by the digital γ correction section, an overdrive value corresponding to the input gray level; and an analog γ correction section for finding a voltage value to be applied to liquid crystal by correcting the overdrive value found by the overdrive circuit. In the digital γ correction section, an analog gamma value for the 3D display is set to be larger than an analog gamma value for the 2D display.

Claims (12)

1. A liquid crystal display device for carrying out a 3D display by a frame sequential method as well as carrying out a 2D display, comprising:

a first gamma correction section for changing an input gray level to a gamma characteristic that corresponds to either the 2D display or the 3D display in accordance with a preset analog gamma value;

a second gamma correction section for correcting a gamma characteristic so that a total gamma characteristic for the 3D display is substantially equal to a total gamma characteristic for the 2D display; and

an overdrive circuit for finding, in accordance with a parameter set according to the gamma characteristic thus corrected by the second gamma correction section, an overdrive value corresponding to the input gray level,

in the first gamma correction section, the analog gamma value for the 3D display being set to be larger than an analog gamma value for the 2D display.

2. The liquid crystal display device according to claim 1 , wherein:

the analog gamma value for the 3D display is set to 2.9; and

the analog gamma value for the 2D display is set to 2.2.

3. A television receiver comprising:

a tuner section for receiving television broadcasting; and

a display device for displaying the television broadcasting received by the tuner section,

the display device being a liquid crystal display device recited in claim 1 .

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 5, 2012
From: TAKAHASHI, MASAYUKI; INOUE, AKIHIKO; TERANUMA, OSAMU
To: SHARP KABUSHIKI KAISHA
Reel/Frame 029406/0416 →
Priority Claims (1)
JP 2010-123459 · May 28, 2010 · national
Continuity (1)
Related Publication 20130076864A1 · Mar 28, 2013