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Title:
COLOR DISPLAY DEVICE, COLOR COMPENSATION METHOD, AND COLOR COMPENSATION PROGRAM
Document Type and Number:
Japanese Patent JP2005134866
Kind Code:
A
Abstract:

To solve the problems with the conventional color compensation technology that, as a result of color compensation, the upper limit values of saturation and luminance of a certain component are exceeded and the conduction of the desired color compensation is heretofore not possible in some cases.

The color display device determines a size relationship between three components of an input color image signal in terms of their gradation levels, and carries out a different calculation for each input color image signal depending on which of six patterns of the size relationship that the input color image signal belongs to. Further, the color display device carries out the calculation for each of the two components excluding a component with a smallest gradation level of the three components, by using variables that vary depending on the sizes of respective gradation levels of the three components.


Inventors:
TOMIZAWA KAZUNARI
MIYAJI KOICHI
Application Number:
JP2004119574A
Publication Date:
May 26, 2005
Filing Date:
April 14, 2004
Export Citation:
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Assignee:
SHARP KK
International Classes:
H04N9/64; G09G5/02; H04N1/46; H04N1/60; (IPC1-7): G09G5/02; H04N1/46; H04N1/60; H04N9/64
Domestic Patent References:
JPH07274021A1995-10-20
JP2001147666A2001-05-29
JP2002229531A2002-08-16
JPH03266586A1991-11-27
JPH01237144A1989-09-21
JPH04304775A1992-10-28
JPH04335771A1992-11-24
JPH05205039A1993-08-13
JPH1169181A1999-03-09
JP2001169125A2001-06-22
JP2000032267A2000-01-28
JP2001111854A2001-04-20
Foreign References:
US5412433A1995-05-02
WO2002019307A12002-03-07
Attorney, Agent or Firm:
Kenzo Hara
Ryuichi Kijima
Ichiro Kaneko



 
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