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 PDFInfo
- 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
- correction
- screen
- 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
Links
- 238000012937 correction Methods 0.000 title claims abstract description 63
- 230000000007 visual effect Effects 0.000 title abstract 3
- 230000006870 function Effects 0.000 claims description 6
- 230000002401 inhibitory effect Effects 0.000 claims 1
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 12
- 230000005540 biological transmission Effects 0.000 description 6
- 230000003044 adaptive effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000012886 linear function Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 235000012431 wafers Nutrition 0.000 description 1
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)
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 (un) | 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 (un) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0545412A2 (en) * | 1991-12-05 | 1993-06-09 | Texas Instruments Incorporated | Method and apparatus to improve a video signal |
EP0614321A2 (en) * | 1993-03-02 | 1994-09-07 | Fujitsu General Limited | Color display unit with plasma display panel |
EP0619595A1 (en) * | 1993-04-05 | 1994-10-12 | Canon Kabushiki Kaisha | Image forming device and method |
WO1995001047A2 (en) * | 1993-06-10 | 1995-01-05 | Barco | A method and a device for converting a picture |
WO1996008940A2 (en) * | 1994-09-16 | 1996-03-21 | Ionica International Limited | Call handoff in digital radio telephony |
WO1996008920A1 (de) * | 1994-09-15 | 1996-03-21 | Philips Electronics N.V. | Schaltungsanordnung zur ansteuerung einer bildröhre |
EP0831643A2 (en) * | 1996-09-18 | 1998-03-25 | Matsushita Electric Industrial Co., Ltd. | Plasma display panel and method of controlling brightness of the same |
EP1571592A2 (en) * | 2004-03-05 | 2005-09-07 | Canon Kabushiki Kaisha | Image signal processor and image signal processing method |
Citations (3)
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 |
-
1989
- 1989-12-22 FR FR8917083A patent/FR2656484A1/fr active Granted
Patent Citations (3)
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)
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 (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0841810A1 (en) * | 1991-12-05 | 1998-05-13 | Texas Instruments Incorporated | Method to improve a video signal |
EP0545412A3 (en) * | 1991-12-05 | 1993-11-03 | Texas Instruments Inc | Method and apparatus to improve a video signal |
EP0545412A2 (en) * | 1991-12-05 | 1993-06-09 | Texas Instruments Incorporated | Method and apparatus to improve a video signal |
EP0614321A2 (en) * | 1993-03-02 | 1994-09-07 | Fujitsu General Limited | Color display unit with plasma display panel |
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 |
WO1995001047A2 (en) * | 1993-06-10 | 1995-01-05 | Barco | A 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 |
US5801780A (en) * | 1993-06-10 | 1998-09-01 | Barco | 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 |
WO1996008940A2 (en) * | 1994-09-16 | 1996-03-21 | Ionica International Limited | Call handoff in digital radio telephony |
EP0831643A2 (en) * | 1996-09-18 | 1998-03-25 | Matsushita Electric Industrial Co., Ltd. | Plasma display panel and method of controlling brightness of the same |
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 |
EP1231779A2 (en) * | 1996-09-18 | 2002-08-14 | 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 |
EP1571592A2 (en) * | 2004-03-05 | 2005-09-07 | Canon Kabushiki Kaisha | Image signal processor and image signal processing method |
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 (un) | 1997-02-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TP | Transmission of property | ||
ST | Notification of lapse |
Effective date: 20060831 |