FR1247855A - Perfectionnements aux circuits de réglage automatique de la luminance et du contraste dans un récepteur de télévision - Google Patents

Perfectionnements aux circuits de réglage automatique de la luminance et du contraste dans un récepteur de télévision

Info

Publication number
FR1247855A
FR1247855A FR818338A FR818338A FR1247855A FR 1247855 A FR1247855 A FR 1247855A FR 818338 A FR818338 A FR 818338A FR 818338 A FR818338 A FR 818338A FR 1247855 A FR1247855 A FR 1247855A
Authority
FR
France
Prior art keywords
television receiver
control circuits
contrast control
automatic luminance
luminance
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
Application number
FR818338A
Other languages
English (en)
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 FR1247855A publication Critical patent/FR1247855A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/44—Receiver circuitry for the reception of television signals according to analogue transmission standards
    • H04N5/57—Control of contrast or brightness
    • H04N5/58—Control of contrast or brightness in dependence upon ambient light

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Receiver Circuits (AREA)
  • Gas-Filled Discharge Tubes (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Picture Signal Circuits (AREA)
  • Transforming Electric Information Into Light Information (AREA)
FR818338A 1959-02-14 1960-02-12 Perfectionnements aux circuits de réglage automatique de la luminance et du contraste dans un récepteur de télévision Expired FR1247855A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL236140 1959-02-14

Publications (1)

Publication Number Publication Date
FR1247855A true FR1247855A (fr) 1960-12-02

Family

ID=19751579

Family Applications (1)

Application Number Title Priority Date Filing Date
FR818338A Expired FR1247855A (fr) 1959-02-14 1960-02-12 Perfectionnements aux circuits de réglage automatique de la luminance et du contraste dans un récepteur de télévision

Country Status (4)

Country Link
US (1) US3027421A (fr)
DE (1) DE1112543B (fr)
FR (1) FR1247855A (fr)
GB (1) GB919286A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1254179B (de) * 1961-04-24 1967-11-16 Philips Patentverwaltung Schaltungsanordnung zum Steuern eines Wechselstrom-Spannungsteilers durch Licht

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1093814B (de) * 1959-04-07 1960-12-01 Standard Elektrik Lorenz Ag Verfahren zur automatischen Kontrastregelung von Fernsehgeraeten
DE1100683B (de) * 1959-09-04 1961-03-02 Philips Patentverwaltung Fernsehempfaenger-Schaltungsanordnung zur Steuerung der Grundhelligkeit und des Kontrastes in Abhaengigkeit von der Raumhelligkeit
DE1201398B (de) 1959-11-27 1965-09-23 Nordmende Einrichtung zur kombinierten selbsttaetigen raum-lichtabhaengigen und fernbedienbaren Einstellung des Kontrastes und/oder der Helligkeit der Bildes bei einem Fernsehempfaenger
GB958588A (en) * 1960-12-08 1964-05-21 Gen Electric Co Ltd Improvements in or relating to colour television receivers
DE1249325B (de) * 1960-12-30 1967-09-07 Radio Corporation Of America, New York, N. Y. (V. St. A.) Schaltungsanordnung :ur raumlichtabhängigen Steuerung des Contrastes und der Helligkeit in einem ernsehempfänger
US3147341A (en) * 1961-04-24 1964-09-01 Gen Electric Automatic brightness-contrast control using photoresistive element to control brightness and agc voltages in response to ambinent light
DE1254181B (de) * 1961-09-14 1967-11-16 Philips Patentverwaltung Schaltungsanordnung in einem gleichstromgekoppelten Transistorverstaerker fuer Fernsehsignale
US3164673A (en) * 1961-12-05 1965-01-05 Gen Electric Automatic brightness and contrast control circuit
BE636525A (fr) * 1962-09-07 1900-01-01
DE1207431B (de) * 1963-10-18 1965-12-23 Philips Patentverwaltung Geraet zur Wiedergabe farbiger Bilder
US3622696A (en) * 1969-04-01 1971-11-23 Motorola Inc Automatic contrast control for a television receiver
US3813686A (en) * 1972-11-27 1974-05-28 Magnovox Co Ambient light responsive control of brightness, contrast and color saturation
JP2752309B2 (ja) * 1993-01-19 1998-05-18 松下電器産業株式会社 表示装置
US20040070565A1 (en) * 2001-12-05 2004-04-15 Nayar Shree K Method and apparatus for displaying images
US7663640B2 (en) * 2003-07-02 2010-02-16 The Trustees Of Columbia University In The City Of New York Methods and systems for compensating an image projected onto a surface having spatially varying photometric properties
WO2006047488A2 (fr) * 2004-10-25 2006-05-04 The Trustees Of Columbia University In The City Of New York Systemes et procedes d'affichage d'images tridimensionnelles
US8817002B2 (en) 2011-09-01 2014-08-26 Blackberry Limited Data display adapted for bright ambient light

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2264172A (en) * 1939-08-25 1941-11-25 John C Batchelor Television receiver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1254179B (de) * 1961-04-24 1967-11-16 Philips Patentverwaltung Schaltungsanordnung zum Steuern eines Wechselstrom-Spannungsteilers durch Licht

Also Published As

Publication number Publication date
DE1112543B (de) 1961-08-10
GB919286A (en) 1963-02-20
US3027421A (en) 1962-03-27

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