FR2406361A1 - Video circuit generating signals reproducing pictures on screen - has switch which suppresses luminance signal when video signal does not change - Google Patents

Video circuit generating signals reproducing pictures on screen - has switch which suppresses luminance signal when video signal does not change

Info

Publication number
FR2406361A1
FR2406361A1 FR7730547A FR7730547A FR2406361A1 FR 2406361 A1 FR2406361 A1 FR 2406361A1 FR 7730547 A FR7730547 A FR 7730547A FR 7730547 A FR7730547 A FR 7730547A FR 2406361 A1 FR2406361 A1 FR 2406361A1
Authority
FR
France
Prior art keywords
video
switch
signal
screen
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
FR7730547A
Other languages
French (fr)
Other versions
FR2406361B1 (en
Inventor
Jean-Pierre Asmus
Joseph Soto
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.)
Radiotechnique SA
Original Assignee
Radiotechnique 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 Radiotechnique SA filed Critical Radiotechnique SA
Priority to FR7730547A priority Critical patent/FR2406361A1/en
Priority to GB7839892A priority patent/GB2007471B/en
Priority to NL7810170A priority patent/NL7810170A/en
Priority to DE19782844112 priority patent/DE2844112C2/en
Priority to CA313,084A priority patent/CA1114535A/en
Priority to JP12500378A priority patent/JPS5946471B2/en
Priority to IE203078A priority patent/IE47294B1/en
Publication of FR2406361A1 publication Critical patent/FR2406361A1/en
Application granted granted Critical
Publication of FR2406361B1 publication Critical patent/FR2406361B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/66—Transforming electric information into light information
    • H04N5/68—Circuit details for cathode-ray display tubes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/10—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical
    • H04N3/16—Scanning details of television systems; Combination thereof with generation of supply voltages by means not exclusively optical-mechanical by deflecting electron beam in cathode-ray tube, e.g. scanning corrections
    • H04N3/20—Prevention of damage to cathode-ray tubes in the event of failure of scanning
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G09G2330/022—Power management, e.g. power saving in absence of operation, e.g. no data being entered during a predetermined time
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/04—Display protection

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

The circuit has a picture signal source, at least one luminance circuit and a protective circuit protecting the screen from burning out. The protective circuit is connected to a protective switch completely or partly suppressing the luminance signal generated in the video circuit. A detector detects changes in the signal from the picture signal source and a timer start input is connected to the detector, and timer output signal is applied to the protective switch control input, so that the switch is off when the detector has detected no changes during a time interval detrmined by the timer.
FR7730547A 1977-10-11 1977-10-11 Video circuit generating signals reproducing pictures on screen - has switch which suppresses luminance signal when video signal does not change Granted FR2406361A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
FR7730547A FR2406361A1 (en) 1977-10-11 1977-10-11 Video circuit generating signals reproducing pictures on screen - has switch which suppresses luminance signal when video signal does not change
GB7839892A GB2007471B (en) 1977-10-11 1978-10-10 Video circuit with screen burn-in protection
NL7810170A NL7810170A (en) 1977-10-11 1978-10-10 VIDEO SWITCHING WITH BURN-IN PROTECTION.
DE19782844112 DE2844112C2 (en) 1977-10-11 1978-10-10 Video circuit with burn-in protection
CA313,084A CA1114535A (en) 1977-10-11 1978-10-11 Video circuit with screen-burn-in protection
JP12500378A JPS5946471B2 (en) 1977-10-11 1978-10-11 video circuit
IE203078A IE47294B1 (en) 1977-10-11 1978-10-11 Video circuit with screen-burn-in protection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7730547A FR2406361A1 (en) 1977-10-11 1977-10-11 Video circuit generating signals reproducing pictures on screen - has switch which suppresses luminance signal when video signal does not change

Publications (2)

Publication Number Publication Date
FR2406361A1 true FR2406361A1 (en) 1979-05-11
FR2406361B1 FR2406361B1 (en) 1980-04-04

Family

ID=9196358

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7730547A Granted FR2406361A1 (en) 1977-10-11 1977-10-11 Video circuit generating signals reproducing pictures on screen - has switch which suppresses luminance signal when video signal does not change

Country Status (1)

Country Link
FR (1) FR2406361A1 (en)

Also Published As

Publication number Publication date
FR2406361B1 (en) 1980-04-04

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Legal Events

Date Code Title Description
TP Transmission of property
CD Change of name or company name
ST Notification of lapse