DE3774295D1 - Gamma-korrekturschaltung. - Google Patents

Gamma-korrekturschaltung.

Info

Publication number
DE3774295D1
DE3774295D1 DE8787200312T DE3774295T DE3774295D1 DE 3774295 D1 DE3774295 D1 DE 3774295D1 DE 8787200312 T DE8787200312 T DE 8787200312T DE 3774295 T DE3774295 T DE 3774295T DE 3774295 D1 DE3774295 D1 DE 3774295D1
Authority
DE
Germany
Prior art keywords
gamma correction
gamma
correction
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.)
Expired - Lifetime
Application number
DE8787200312T
Other languages
English (en)
Inventor
Rooy Johannes Henricus Joz Van
Johannes Marinus Menting
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of DE3774295D1 publication Critical patent/DE3774295D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/20—Circuitry for controlling amplitude response
    • H04N5/202—Gamma control
DE8787200312T 1986-03-07 1987-02-25 Gamma-korrekturschaltung. Expired - Lifetime DE3774295D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL8600593 1986-03-07

Publications (1)

Publication Number Publication Date
DE3774295D1 true DE3774295D1 (de) 1991-12-12

Family

ID=19847674

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8787200312T Expired - Lifetime DE3774295D1 (de) 1986-03-07 1987-02-25 Gamma-korrekturschaltung.

Country Status (5)

Country Link
US (1) US4847524A (de)
EP (1) EP0235862B1 (de)
JP (1) JPS62219777A (de)
CA (1) CA1272797A (de)
DE (1) DE3774295D1 (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01196978A (ja) * 1988-01-30 1989-08-08 Fuji Photo Film Co Ltd 書類撮影用ビデオカメラ
FI87860C (fi) * 1988-04-05 1993-02-25 Nokia Mobira Oy Differentialutgaongens koppling som enpolig
DE4203092A1 (de) * 1992-02-04 1993-08-05 Philips Patentverwaltung Verfahren zur kontrastkorrektur
US5461430A (en) * 1992-12-04 1995-10-24 Hughes Jvc Tech Corp Dynamic gamma correction circuit for use in image projectors
JP3071590B2 (ja) * 1993-01-05 2000-07-31 日本電気株式会社 液晶ディスプレイ装置
WO1995006999A1 (en) * 1993-09-03 1995-03-09 Hughes-Jvc Technology Corporation Dynamic gamma correction circuit for use in image projectors
WO1998046028A1 (en) * 1997-04-07 1998-10-15 Koninklijke Philips Electronics N.V. Gamma correction
US5900918A (en) * 1997-07-30 1999-05-04 Hughes-Jvc Technology Corporation Adjustable video gamma circuit
JP2000022988A (ja) * 1998-07-06 2000-01-21 Sony Corp ガンマ補正回路
JP2000134507A (ja) * 1998-10-21 2000-05-12 Sony Corp ガンマ補正回路
KR20020006019A (ko) * 1998-12-14 2002-01-18 도날드 피. 게일 휴대용 마이크로디스플레이 시스템
JP4670172B2 (ja) * 2001-04-20 2011-04-13 ソニー株式会社 画像表示装置
CA2443206A1 (en) 2003-09-23 2005-03-23 Ignis Innovation Inc. Amoled display backplanes - pixel driver circuits, array architecture, and external compensation
JP2009124514A (ja) 2007-11-15 2009-06-04 Sony Corp 固体撮像素子、およびカメラシステム

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3708693A (en) * 1971-05-19 1973-01-02 Ferrex Corp Gamma corrector
US3793480A (en) * 1971-12-29 1974-02-19 United Aircraft Corp Exponential transconductance multiplier and integrated video processor
JPS57124972A (en) * 1981-01-27 1982-08-04 Sony Corp Gamma compensation circuit
JPS57199371A (en) * 1981-06-03 1982-12-07 Hitachi Ltd Gamma correcting circuit
JPS58130676A (ja) * 1982-01-29 1983-08-04 Toshiba Corp ガンマ補正回路
JPS58206977A (ja) * 1982-05-27 1983-12-02 Toshiba Corp 電圧比較回路
CA1204853A (en) * 1983-01-07 1986-05-20 Joichi Sato Gamma compensating circuit
JPS59126374A (ja) * 1983-01-07 1984-07-20 Sony Corp 非直線回路
US4651210A (en) * 1984-12-24 1987-03-17 Rca Corporation Adjustable gamma controller

Also Published As

Publication number Publication date
EP0235862B1 (de) 1991-11-06
EP0235862A1 (de) 1987-09-09
US4847524A (en) 1989-07-11
JPS62219777A (ja) 1987-09-28
CA1272797A (en) 1990-08-14

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: PHILIPS ELECTRONICS N.V., EINDHOVEN, NL

8339 Ceased/non-payment of the annual fee