JPS5795764A - Protecting device for television receiver - Google Patents

Protecting device for television receiver

Info

Publication number
JPS5795764A
JPS5795764A JP17189380A JP17189380A JPS5795764A JP S5795764 A JPS5795764 A JP S5795764A JP 17189380 A JP17189380 A JP 17189380A JP 17189380 A JP17189380 A JP 17189380A JP S5795764 A JPS5795764 A JP S5795764A
Authority
JP
Japan
Prior art keywords
horizontal
circuit
trs
current
oscillation
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
JP17189380A
Other languages
Japanese (ja)
Other versions
JPS6113427B2 (en
Inventor
Masaki Hosono
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP17189380A priority Critical patent/JPS5795764A/en
Publication of JPS5795764A publication Critical patent/JPS5795764A/en
Publication of JPS6113427B2 publication Critical patent/JPS6113427B2/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
    • H04N3/20—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)

Abstract

PURPOSE:To prevent the production of X-rays, by stopping the operation of a horizontal oscillation circuit, when a power supply voltage increases to a specified voltage. CONSTITUTION:When a power supply voltage Vcc is increased abnormally and is higher than an operation start voltage of an X-ray protection circuit 14, the X-ray protection circuit 14 is momentarily activated since it consists of a positive feedback switching circuit, and a current supplying to a horizontal oscillation circuit 11 is zero to stop horizontal oscillation. Since a current applying to a horizontal driving circuit 13 with a current mirror circuit consisting of transistors (TR)Q3, Q4, Q7 is zero, TRs Q8, Q9, Q10 are all cut off, and no current flows to a horizontal driving transformers connected to the horizontal driving circuit 13, and furthermore, since horizontal output TRs are cut off, no excessive current flows to horizontal oscillation TRs and the horizontal output TRs.
JP17189380A 1980-12-04 1980-12-04 Protecting device for television receiver Granted JPS5795764A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17189380A JPS5795764A (en) 1980-12-04 1980-12-04 Protecting device for television receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17189380A JPS5795764A (en) 1980-12-04 1980-12-04 Protecting device for television receiver

Publications (2)

Publication Number Publication Date
JPS5795764A true JPS5795764A (en) 1982-06-14
JPS6113427B2 JPS6113427B2 (en) 1986-04-14

Family

ID=15931755

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17189380A Granted JPS5795764A (en) 1980-12-04 1980-12-04 Protecting device for television receiver

Country Status (1)

Country Link
JP (1) JPS5795764A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH671480A5 (en) * 1986-06-20 1989-08-31 Wilfried Duenki

Also Published As

Publication number Publication date
JPS6113427B2 (en) 1986-04-14

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