Title:
LIQUID CRYSTAL DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2007/055131
Kind Code:
A1
Abstract:
Provided is a display device capable of realizing an appropriate screen display luminance
in accordance with a video characteristic amount and brightness around and sufficiently
reducing power consumption. A liquid crystal display device (1) includes: a
liquid crystal panel (20) for displaying a video by an input video signal; a backlight
unit (17) as a light source for irradiating the liquid crystal panel (20); and
a brightness sensor (24) for detecting the brightness around the liquid crystal
display device (1). According to the brightness detected by the brightness sensor
(24), luminance conversion characteristic defining the light emission luminance
of the backlight for the characteristic amount (such as APL) of the input video
signal is changed. Here, the luminance conversion characteristic is changed
so that the light emission luminance is reduced as the brightness around the liquid
crystal display device becomes darker and the position of the characteristic
modification point as the point where the inclination of the luminance conversion
characteristic is changed is shifted in the direction of the characteristic
amount change. According to the obtained luminance conversion characteristic,
the light emission luminance of the backlight is controlled.
Inventors:
FUJINE TOSHIYUKI
KOHASHIKAWA SEIJI
SEKIGUCHI YUHYA
YAMAGUCHI YUHICHIRO
KOHASHIKAWA SEIJI
SEKIGUCHI YUHYA
YAMAGUCHI YUHICHIRO
Application Number:
PCT/JP2006/321847
Publication Date:
May 18, 2007
Filing Date:
November 01, 2006
Export Citation:
Assignee:
SHARP KK (JP)
FUJINE TOSHIYUKI
KOHASHIKAWA SEIJI
SEKIGUCHI YUHYA
YAMAGUCHI YUHICHIRO
FUJINE TOSHIYUKI
KOHASHIKAWA SEIJI
SEKIGUCHI YUHYA
YAMAGUCHI YUHICHIRO
International Classes:
G09G3/36; G02F1/133; G09G3/20; G09G3/34; H04N5/66
Foreign References:
| JP2004177547A | 2004-06-24 | |||
| JPH11327454A | 1999-11-26 | |||
| JP2001350134A | 2001-12-21 | |||
| JP2004294767A | 2004-10-21 | |||
| JPS6315226A | 1988-01-22 |
Other References:
None
See also references of EP 1950731A4
See also references of EP 1950731A4
Attorney, Agent or Firm:
TAKANO, Akichika (9th Floor Salute Bldg., 72, Yoshida-cho, Naka-k, Yokohama-shi Kanagawa 41, JP)
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