JPS572164A - High voltage limiting circuit of television receiver - Google Patents

High voltage limiting circuit of television receiver

Info

Publication number
JPS572164A
JPS572164A JP7421280A JP7421280A JPS572164A JP S572164 A JPS572164 A JP S572164A JP 7421280 A JP7421280 A JP 7421280A JP 7421280 A JP7421280 A JP 7421280A JP S572164 A JPS572164 A JP S572164A
Authority
JP
Japan
Prior art keywords
high voltage
circuit
voltage
limiting circuit
resistances
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
JP7421280A
Other languages
Japanese (ja)
Other versions
JPS639713B2 (en
Inventor
Kenichi Fujiwara
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7421280A priority Critical patent/JPS572164A/en
Publication of JPS572164A publication Critical patent/JPS572164A/en
Publication of JPS639713B2 publication Critical patent/JPS639713B2/ja
Granted 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
    • H04N3/18—Generation of supply voltages, in combination with electron beam deflecting

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Details Of Television Scanning (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

PURPOSE:To avoid a leakage of X-rays when a resonance capacitor is opened, by installing a switch means with which the DC voltage to be supplied to a deflecting circuit and the high voltage detection voltage of a CRT vary in a forward bias and thus actuating a high voltage limiting circuit in accordance with a change of the above-mentioned voltages. CONSTITUTION:An input terminal 8 at the control part of a high voltage limiting circuit is connected to a high voltage detection winding 2 of an FBT1 of a TV picture receiver via a rectifying diode 3 plus partial voltage resistances 5 and 6. The DC voltage to be supplied to a horizontal oscillating circuit 7 is monitored at the control part 12 of the high voltage limiting circuit to be prevented from becoming more than a prescribed level. A switching circuit S, containing resistances 19 and 20 that divide the high voltage detection voltage V2, resistances 17 and 18 that divide the DC voltage +V3 plus a switching transistor TR22, is provided to the circuit 7. Then an adverse bias is usually given to the voltages +V3 and V2, and the voltages V3 and V2 are changed to an adverse bias when a horizontal resonance capacitor 4 is opened. The control part 12 is controlled by a conduction of the TR22. Thus a leakage of X-rays can be avoided.
JP7421280A 1980-06-04 1980-06-04 High voltage limiting circuit of television receiver Granted JPS572164A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7421280A JPS572164A (en) 1980-06-04 1980-06-04 High voltage limiting circuit of television receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7421280A JPS572164A (en) 1980-06-04 1980-06-04 High voltage limiting circuit of television receiver

Publications (2)

Publication Number Publication Date
JPS572164A true JPS572164A (en) 1982-01-07
JPS639713B2 JPS639713B2 (en) 1988-03-01

Family

ID=13540650

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7421280A Granted JPS572164A (en) 1980-06-04 1980-06-04 High voltage limiting circuit of television receiver

Country Status (1)

Country Link
JP (1) JPS572164A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6458175A (en) * 1987-08-28 1989-03-06 Matsushita Electric Ind Co Ltd Protective circuit for television receiver

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6458175A (en) * 1987-08-28 1989-03-06 Matsushita Electric Ind Co Ltd Protective circuit for television receiver

Also Published As

Publication number Publication date
JPS639713B2 (en) 1988-03-01

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