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 changeInfo
- 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
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.
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) |
-
1977
- 1977-10-11 FR FR7730547A patent/FR2406361A1/en active Granted
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 |