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 US12/675,330 priority Critical patent/US8594421B2/en
Priority to CN2008801059109A priority patent/CN101796572B/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
US12/675,330 US8594421B2 (en) 2007-09-06 2008-09-05 Color correction circuit and image display apparatus using same
CN2008801059109A CN101796572B (en) 2007-09-06 2008-09-05 Color correction circuit and image display device using same

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2007-230953 2007-09-06
JP2007230953 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

Similar Documents

Publication Publication Date Title
JP2007150379A5 (en)
TW200721806A (en) Image processing apparatus, image display and image processing method
WO2007044842A3 (en) Automatic white point adjustment during video display
TW200614825A (en) Methods and systems for color image processing
US8447363B2 (en) Mobile phone terminal, image display control method, program thereof and program recording medium
JP4468467B2 (en) Video signal control device, video display system, and video signal control method
WO2008058244A3 (en) Method and apparatus for color image correction
WO2009001467A1 (en) Electronic device for improving brightness of recorded image in low luminance environment
WO2007145373A3 (en) Solid-state image sensor
EP1347654A3 (en) Video correction apparatus and method, video correction program, and recording medium on which the program is recorded
JP2015179253A5 (en)
EP2579574A4 (en) Imaging device
TW200701761A (en) Method for processing color signal
TW200520559A (en) Image pickup apparatus
JP2012039271A5 (en)
TW200733740A (en) Method and apparatus for removing color noise in image signal
WO2006091584A3 (en) Local saturation adjustment for images
JP2012027547A5 (en)
TW200614802A (en) Image input apparatus that resolves color difference
WO2006094265A3 (en) Sharpness filtering for picture-smoothing architectures
WO2009018494A3 (en) Scene-dependent auto exposure control
WO2009031661A1 (en) Color correction circuit and image display device using same
CN101510955A (en) Image pickup device
JP2008242330A5 (en)
US20070188661A1 (en) Image processing method capable of adjusting hue and saturation of specific colors and related image processing apparatus thereof

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200880105910.9

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08829402

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 12675330

Country of ref document: US

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08829402

Country of ref document: EP

Kind code of ref document: A1