FR2390842A1 - Circuit de protection contre les hautes tensions - Google Patents

Circuit de protection contre les hautes tensions

Info

Publication number
FR2390842A1
FR2390842A1 FR7814279A FR7814279A FR2390842A1 FR 2390842 A1 FR2390842 A1 FR 2390842A1 FR 7814279 A FR7814279 A FR 7814279A FR 7814279 A FR7814279 A FR 7814279A FR 2390842 A1 FR2390842 A1 FR 2390842A1
Authority
FR
France
Prior art keywords
voltage
high voltage
producing
representative
protection 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.)
Withdrawn
Application number
FR7814279A
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.)
RCA Corp
Original Assignee
RCA Corp
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 RCA Corp filed Critical RCA Corp
Publication of FR2390842A1 publication Critical patent/FR2390842A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Details Of Television Scanning (AREA)
  • Television Receiver Circuits (AREA)

Abstract

L'invention concerne un appareil de protection contre les hautes tensions qui comprend un transformateur sensible à une première tension alternative pour produire un potentiel d'accélération à haute tension pour un courant de faisceaux; un premier enroulement couplé au transformateur et produisant une seconde tension alternative représentative du potentiel d'accélération; un circuit de protection couplé au premier enroulement et sensible à la seconde tension pour produire un signal empêchant le fonctionnement du récepteur quand le potentiel d'accélération dépasse une première valeur; un moyen de détection de courant de faisceaux produisant une tension représentative de la grandeur de ce courant. Selon l'invention, un moyen 54 est couplé à des bornes A et B pour bloquer la borne A à la tension représentative pendant une partie d'un intervalle d'intervalle de la seconde tension alternative quand le courant des faisceaux est égal ou inférieur à une certaine valeur pour changer la première valeur. L'invention s'applique notamment aux téléviseurs couleurs.
FR7814279A 1977-05-13 1978-05-12 Circuit de protection contre les hautes tensions Withdrawn FR2390842A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/796,669 US4126816A (en) 1977-05-13 1977-05-13 High voltage protection circuit

Publications (1)

Publication Number Publication Date
FR2390842A1 true FR2390842A1 (fr) 1978-12-08

Family

ID=25168755

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7814279A Withdrawn FR2390842A1 (fr) 1977-05-13 1978-05-12 Circuit de protection contre les hautes tensions

Country Status (14)

Country Link
US (1) US4126816A (fr)
JP (1) JPS53141537A (fr)
AU (1) AU3586178A (fr)
BE (1) BE867041A (fr)
CA (1) CA1096492A (fr)
DE (1) DE2820995A1 (fr)
ES (1) ES469798A1 (fr)
FI (1) FI781415A (fr)
FR (1) FR2390842A1 (fr)
GB (1) GB1600563A (fr)
IT (1) IT7823300A0 (fr)
NZ (1) NZ187261A (fr)
PL (1) PL116502B1 (fr)
SE (1) SE7805157L (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2475816A1 (fr) * 1980-02-11 1981-08-14 Rca Corp Circuit de protection contre les hautes tensions pour televiseur

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6031297B2 (ja) * 1977-04-18 1985-07-22 株式会社日立製作所 高圧保護装置
JPS6022694Y2 (ja) * 1977-12-07 1985-07-05 ソニー株式会社 テレビ受像機の高圧制限回路
US4323826A (en) * 1978-04-17 1982-04-06 Cpt Corporation Drive circuits for a high resolution cathode ray tube display
US4176304A (en) * 1978-05-09 1979-11-27 Rca Corporation Regulating television horizontal deflection arrangement
JPS596488B2 (ja) * 1978-12-15 1984-02-13 三洋電機株式会社 フライバツクトランス
US4343028A (en) * 1981-01-21 1982-08-03 Rca Corporation Television receiver high voltage generator protection circuit
US4335335A (en) * 1980-02-11 1982-06-15 Rca Corporation Television receiver high voltage protection circuit
US4321513A (en) * 1980-09-08 1982-03-23 Rca Corporation Television receiver high voltage protection circuit
US4345275A (en) * 1981-01-16 1982-08-17 Rca Corporation High voltage protection circuit for a television receiver
US4749919A (en) * 1982-05-10 1988-06-07 Zenith Electronics Corporation Shutdown circuit for video monitor
US4639785A (en) * 1984-03-26 1987-01-27 Rca Corporation Non-saturating video output amplifier
JPH07114453B2 (ja) * 1984-09-25 1995-12-06 ソニー株式会社 偏平形陰極線管
US4797771A (en) * 1987-06-30 1989-01-10 Rca Licensing Corporation Television fault detection and protection apparatus
US4841406A (en) * 1987-09-28 1989-06-20 North American Philips Consumer Electronics Corp. X-radiation protection circuit
EP0600352B1 (fr) * 1992-12-01 1999-05-12 Thomson Consumer Electronics, Inc. Système de protection contre la surtension pour téléviseurs
JPH06217158A (ja) * 1993-01-13 1994-08-05 Sony Corp Ｃｒｔ保護回路
DE19616272A1 (de) * 1996-04-24 1997-10-30 Thomson Brandt Gmbh Schaltung zur Begrenzung des Strahlstroms einer Bildröhre
US6847404B1 (en) 1998-09-29 2005-01-25 Thomson Licensing S.A. Video display protection circuit

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3692932A (en) * 1971-05-18 1972-09-19 Rca Corp Horizontal oscillator disabling circuit control apparatus
DE2252973A1 (de) * 1972-10-28 1974-05-16 Loewe Opta Gmbh Schaltungsanordnung zur unterbrechung der energieversorgung einer thyristorhorizontalablenkschaltung in fernsehempfangsgeraeten bei leistungsueberlastung der bildroehre und/oder in abhaengigkeit des ablenkstromes

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3535445A (en) * 1967-08-18 1970-10-20 Motorola Inc Cathode ray tube protection circuit
US3879649A (en) * 1974-02-11 1975-04-22 Tektronix Inc Selectable rectified alternating voltage power supply
US4047078A (en) * 1976-06-01 1977-09-06 Zenith Radio Corporation Pulse differentiating high voltage shutdown circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3692932A (en) * 1971-05-18 1972-09-19 Rca Corp Horizontal oscillator disabling circuit control apparatus
DE2252973A1 (de) * 1972-10-28 1974-05-16 Loewe Opta Gmbh Schaltungsanordnung zur unterbrechung der energieversorgung einer thyristorhorizontalablenkschaltung in fernsehempfangsgeraeten bei leistungsueberlastung der bildroehre und/oder in abhaengigkeit des ablenkstromes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2475816A1 (fr) * 1980-02-11 1981-08-14 Rca Corp Circuit de protection contre les hautes tensions pour televiseur

Also Published As

Publication number Publication date
PL206729A1 (pl) 1979-02-12
JPS53141537A (en) 1978-12-09
ES469798A1 (es) 1979-01-16
PL116502B1 (en) 1981-06-30
CA1096492A (fr) 1981-02-24
GB1600563A (en) 1981-10-21
US4126816A (en) 1978-11-21
AU3586178A (en) 1979-11-15
SE7805157L (sv) 1978-11-14
BE867041A (fr) 1978-09-01
FI781415A (fi) 1978-11-14
DE2820995A1 (de) 1978-11-23
IT7823300A0 (it) 1978-05-11
NZ187261A (en) 1981-04-24

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Legal Events

Date Code Title Description
ST Notification of lapse