WO2009031661A1 - Color correction circuit and image display device using same - Google Patents

Color correction circuit and image display device using same Download PDF

Info

Publication number
WO2009031661A1
WO2009031661A1 PCT/JP2008/066104 JP2008066104W WO2009031661A1 WO 2009031661 A1 WO2009031661 A1 WO 2009031661A1 JP 2008066104 W JP2008066104 W JP 2008066104W WO 2009031661 A1 WO2009031661 A1 WO 2009031661A1
Authority
WO
WIPO (PCT)
Prior art keywords
color correction
display device
image display
same
correction circuit
Prior art date
Application number
PCT/JP2008/066104
Other languages
French (fr)
Japanese (ja)
Inventor
Takeshi Adachi
Original Assignee
Mitsumi Electric Co., Ltd.
Atrc Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2008225251A external-priority patent/JP5023024B2/en
Application filed by Mitsumi Electric Co., Ltd., Atrc Corporation filed Critical Mitsumi Electric Co., Ltd.
Priority to CN2008801059109A priority Critical patent/CN101796572B/en
Priority to US12/675,330 priority patent/US8594421B2/en
Publication of WO2009031661A1 publication Critical patent/WO2009031661A1/en

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2003—Display of colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • G09G5/06—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed using colour palettes, e.g. look-up tables
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing
    • G09G2340/06—Colour space transformation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00—Aspects of the architecture of display systems
    • G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

It is an object to provide a color correction circuit and an image display device using the same that are configured to carry out an optimum color correction of a video signal by enhancing or suppressing specific hue in response to a characteristic of a video from its brightness information and a chromaticity histogram and to enable a color correction of arbitrary hue thereby correcting a color characteristic of a display device. For this purpose, the present invention is characterized in comprising a detecting unit (11-14) that detects brightness information of an input video signal and a chromaticity histogram including chroma saturation and hue, and a control unit (15, 16) that controls the color reproduction of the video signal in accordance with the brightness information and the chromaticity histogram detected by the detecting unit.
PCT/JP2008/066104 2007-09-06 2008-09-05 Color correction circuit and image display device using same WO2009031661A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2008801059109A CN101796572B (en) 2007-09-06 2008-09-05 Color correction circuit and image display device using same
US12/675,330 US8594421B2 (en) 2007-09-06 2008-09-05 Color correction circuit and image display apparatus using same

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2007230953 2007-09-06
JP2007-230953 2007-09-06
JP2008-225251 2008-09-02
JP2008225251A JP5023024B2 (en) 2007-09-06 2008-09-02 Color correction circuit and image display apparatus using the same

Publications (1)

Publication Number Publication Date
WO2009031661A1 true WO2009031661A1 (en) 2009-03-12

Family

ID=40428973

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/066104 WO2009031661A1 (en) 2007-09-06 2008-09-05 Color correction circuit and image display device using same

Country Status (1)

Country Link
WO (1) WO2009031661A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000316095A (en) * 1999-04-30 2000-11-14 Matsushita Research Institute Tokyo Inc Picture processor and picture processing method
JP2006093753A (en) * 2004-09-21 2006-04-06 Hitachi Ltd Video display
WO2006095496A1 (en) * 2005-03-10 2006-09-14 Sharp Kabushiki Kaisha Color changing device, program, image display, and portable terminal
JP2006267140A (en) * 2005-03-22 2006-10-05 Hitachi Ltd Video processing device and portable terminal apparatus
JP2006311179A (en) * 2005-04-28 2006-11-09 Hitachi Ltd Video display device, video signal processing circuit for use in the same, and method for controlling degree of color saturation of video signal
JP2007017862A (en) * 2005-07-11 2007-01-25 Mitsubishi Electric Corp Image display device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000316095A (en) * 1999-04-30 2000-11-14 Matsushita Research Institute Tokyo Inc Picture processor and picture processing method
JP2006093753A (en) * 2004-09-21 2006-04-06 Hitachi Ltd Video display
WO2006095496A1 (en) * 2005-03-10 2006-09-14 Sharp Kabushiki Kaisha Color changing device, program, image display, and portable terminal
JP2006267140A (en) * 2005-03-22 2006-10-05 Hitachi Ltd Video processing device and portable terminal apparatus
JP2006311179A (en) * 2005-04-28 2006-11-09 Hitachi Ltd Video display device, video signal processing circuit for use in the same, and method for controlling degree of color saturation of video signal
JP2007017862A (en) * 2005-07-11 2007-01-25 Mitsubishi Electric Corp Image display device

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