FR2656484A1 - Dispositif de correction de gamma des signaux video destines a un ecran de visualisation et recepteur de television comportant un ecran recevant des signaux d'un tel dispositif. - Google Patents

Dispositif de correction de gamma des signaux video destines a un ecran de visualisation et recepteur de television comportant un ecran recevant des signaux d'un tel dispositif. Download PDF

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Publication number
FR2656484A1
FR2656484A1 FR8917083A FR8917083A FR2656484A1 FR 2656484 A1 FR2656484 A1 FR 2656484A1 FR 8917083 A FR8917083 A FR 8917083A FR 8917083 A FR8917083 A FR 8917083A FR 2656484 A1 FR2656484 A1 FR 2656484A1
Authority
FR
France
Prior art keywords
screen
correction
gamma
screens
circuit
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
FR8917083A
Other languages
English (en)
French (fr)
Other versions
FR2656484B1 (enrdf_load_stackoverflow
Inventor
Eouzan Jean-Yves
Auffret Eric
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thales SA
Original Assignee
Thomson CSF SA
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
Application filed by Thomson CSF SA filed Critical Thomson CSF SA
Priority to FR8917083A priority Critical patent/FR2656484A1/fr
Publication of FR2656484A1 publication Critical patent/FR2656484A1/fr
Application granted granted Critical
Publication of FR2656484B1 publication Critical patent/FR2656484B1/fr
Granted legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/68—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits
    • H04N9/69—Circuits for processing colour signals for controlling the amplitude of colour signals, e.g. automatic chroma control circuits for modifying the colour signals by gamma correction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
  • Processing Of Color Television Signals (AREA)
  • Transforming Electric Information Into Light Information (AREA)
FR8917083A 1989-12-22 1989-12-22 Dispositif de correction de gamma des signaux video destines a un ecran de visualisation et recepteur de television comportant un ecran recevant des signaux d'un tel dispositif. Granted FR2656484A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8917083A FR2656484A1 (fr) 1989-12-22 1989-12-22 Dispositif de correction de gamma des signaux video destines a un ecran de visualisation et recepteur de television comportant un ecran recevant des signaux d'un tel dispositif.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8917083A FR2656484A1 (fr) 1989-12-22 1989-12-22 Dispositif de correction de gamma des signaux video destines a un ecran de visualisation et recepteur de television comportant un ecran recevant des signaux d'un tel dispositif.

Publications (2)

Publication Number Publication Date
FR2656484A1 true FR2656484A1 (fr) 1991-06-28
FR2656484B1 FR2656484B1 (enrdf_load_stackoverflow) 1997-02-21

Family

ID=9388886

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8917083A Granted FR2656484A1 (fr) 1989-12-22 1989-12-22 Dispositif de correction de gamma des signaux video destines a un ecran de visualisation et recepteur de television comportant un ecran recevant des signaux d'un tel dispositif.

Country Status (1)

Country Link
FR (1) FR2656484A1 (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0545412A3 (en) * 1991-12-05 1993-11-03 Texas Instruments Inc Method and apparatus to improve a video signal
EP0619595A1 (en) * 1993-04-05 1994-10-12 Canon Kabushiki Kaisha Image forming device and method
WO1995001047A3 (en) * 1993-06-10 1995-03-02 Barco A method and a device for converting a picture
WO1996008920A1 (de) * 1994-09-15 1996-03-21 Philips Electronics N.V. Schaltungsanordnung zur ansteuerung einer bildröhre
EP0614321A3 (en) * 1993-03-02 1996-10-16 Fujitsu General Ltd Color display unit with plasma display panel.
EP0831643A3 (en) * 1996-09-18 1998-04-01 Matsushita Electric Industrial Co., Ltd. Plasma display panel and method of controlling brightness of the same
EP1571592A3 (en) * 2004-03-05 2005-12-21 Canon Kabushiki Kaisha Image signal processor and image signal processing method

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57124972A (en) * 1981-01-27 1982-08-04 Sony Corp Gamma compensation circuit
JPS57188182A (en) * 1981-05-14 1982-11-19 Seiko Epson Corp Gamma compensation circut for liquid crystal video display
EP0145966A2 (en) * 1983-11-28 1985-06-26 General Electric Company Brightness control system for CRT video display

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57124972A (en) * 1981-01-27 1982-08-04 Sony Corp Gamma compensation circuit
JPS57188182A (en) * 1981-05-14 1982-11-19 Seiko Epson Corp Gamma compensation circut for liquid crystal video display
EP0145966A2 (en) * 1983-11-28 1985-06-26 General Electric Company Brightness control system for CRT video display

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
ELECTRONIC ENGINEERING, vol. 42, no. 511, septembre 1970, pages 90-93; K.G. FREEMAN et al.: "Variable gamma corrector improves television video signals" *
PATENT ABSTRACTS OF JAPAN, vol. 6, no. 222 (E-140)[1100], 6 novembre 1982; & JP-A-57 124 972 (SONY K.K.) 04-08-1982 *
PATENT ABSTRACTS OF JAPAN, vol. 7, no. 36 (E-158)[1181], 15 février 1983; & JP-A-57 188 182 (SUWA SEIKOSHA K.K.) 19-11-1982 *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0545412A3 (en) * 1991-12-05 1993-11-03 Texas Instruments Inc Method and apparatus to improve a video signal
EP0841810A1 (en) * 1991-12-05 1998-05-13 Texas Instruments Incorporated Method to improve a video signal
EP0614321A3 (en) * 1993-03-02 1996-10-16 Fujitsu General Ltd Color display unit with plasma display panel.
EP0619595A1 (en) * 1993-04-05 1994-10-12 Canon Kabushiki Kaisha Image forming device and method
US5654607A (en) * 1993-04-05 1997-08-05 Canon Kabushiki Kaisha Image forming device and method including surface-conduction electron emitting devices and an electrode array for generating an electron beam
US5801780A (en) * 1993-06-10 1998-09-01 Barco Method and a device for converting a picture
WO1995001047A3 (en) * 1993-06-10 1995-03-02 Barco A method and a device for converting a picture
WO1996008920A1 (de) * 1994-09-15 1996-03-21 Philips Electronics N.V. Schaltungsanordnung zur ansteuerung einer bildröhre
EP0831643A3 (en) * 1996-09-18 1998-04-01 Matsushita Electric Industrial Co., Ltd. Plasma display panel and method of controlling brightness of the same
US6034656A (en) * 1996-09-18 2000-03-07 Matsushita Electric Industrial Co., Ltd. Plasma display panel and method of controlling brightness of the same
EP1231779A3 (en) * 1996-09-18 2002-11-27 Matsushita Electric Industrial Co., Ltd. Plasma display panel and method of controlling brightness of the same
EP1571592A3 (en) * 2004-03-05 2005-12-21 Canon Kabushiki Kaisha Image signal processor and image signal processing method
US7606438B2 (en) 2004-03-05 2009-10-20 Canon Kabushiki Kaisha Image signal processor and image signal processing method

Also Published As

Publication number Publication date
FR2656484B1 (enrdf_load_stackoverflow) 1997-02-21

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Effective date: 20060831