ES255529A1 - Improvements in or relating to circuit arrangements for the prevention of screen burning in cathode ray tubes - Google Patents

Improvements in or relating to circuit arrangements for the prevention of screen burning in cathode ray tubes

Info

Publication number
ES255529A1
ES255529A1 ES0255529A ES255529A ES255529A1 ES 255529 A1 ES255529 A1 ES 255529A1 ES 0255529 A ES0255529 A ES 0255529A ES 255529 A ES255529 A ES 255529A ES 255529 A1 ES255529 A1 ES 255529A1
Authority
ES
Spain
Prior art keywords
receiver
relating
prevention
cathode ray
ray tubes
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
ES0255529A
Other languages
Spanish (es)
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
Publication of ES255529A1 publication Critical patent/ES255529A1/en
Expired 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)
  • Transforming Electric Information Into Light Information (AREA)
  • Details Of Television Scanning (AREA)

Abstract

Provision of circuits to prevent burns of the screen in the image tube of a television receiver, when the latter is disconnected, the receiver being provided with an anode voltage supply, while, due to the resistors and capacitors included in the receiver, the supply voltages supplied by the anode power supply decrease only gradually when the receiver is switched off; said arrangement characterized by the fact that the negative polarization voltage applied between the Wehnelt cylinder and the cathode of the presentation tube is obtained by means of a rectifier circuit fed from an auxiliary alternating voltage source arranged in the receiver, while qeu, when turning off or disconnecting the receiver, the rectifier associated with this rectifier circuit stops driving, said negative polarization voltage being suppressed. (Machine-translation by Google Translate, not legally binding)
ES0255529A 1959-02-07 1960-02-04 Improvements in or relating to circuit arrangements for the prevention of screen burning in cathode ray tubes Expired ES255529A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL235893 1959-02-07

Publications (1)

Publication Number Publication Date
ES255529A1 true ES255529A1 (en) 1960-04-16

Family

ID=19751559

Family Applications (1)

Application Number Title Priority Date Filing Date
ES0255529A Expired ES255529A1 (en) 1959-02-07 1960-02-04 Improvements in or relating to circuit arrangements for the prevention of screen burning in cathode ray tubes

Country Status (8)

Country Link
BE (1) BE587350A (en)
CH (1) CH381277A (en)
DE (1) DE1412420B1 (en)
DK (1) DK103682C (en)
ES (1) ES255529A1 (en)
FR (1) FR1247213A (en)
GB (1) GB925448A (en)
NL (2) NL113859C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1055628B (en) * 1975-10-09 1982-01-11 Indesit CIRCUIT TO PREVENT THE FORMATION OF THE LIGHT POINT IN A TELEVISION

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2248815A (en) * 1938-08-04 1941-07-08 Lorenz C Ag Television receiver
DE1012955B (en) * 1953-12-14 1957-08-01 Lorenz C Ag Arrangement to prevent the afterglow of the stationary light spot after switching off devices with cathode ray tubes, especially in television sets

Also Published As

Publication number Publication date
GB925448A (en) 1963-05-08
BE587350A (en) 1960-08-05
FR1247213A (en) 1960-11-25
NL113859C (en)
CH381277A (en) 1964-08-31
NL235893A (en)
DK103682C (en) 1966-02-07
DE1412420B1 (en) 1970-05-14

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