JPS6462084A - Spot killer circuit for crt - Google Patents

Spot killer circuit for crt

Info

Publication number
JPS6462084A
JPS6462084A JP21804087A JP21804087A JPS6462084A JP S6462084 A JPS6462084 A JP S6462084A JP 21804087 A JP21804087 A JP 21804087A JP 21804087 A JP21804087 A JP 21804087A JP S6462084 A JPS6462084 A JP S6462084A
Authority
JP
Japan
Prior art keywords
cathode
grid
outputted
crt
spot
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.)
Pending
Application number
JP21804087A
Other languages
Japanese (ja)
Inventor
Chiharu Arai
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.)
Anritsu Corp
Original Assignee
Anritsu 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 Anritsu Corp filed Critical Anritsu Corp
Priority to JP21804087A priority Critical patent/JPS6462084A/en
Publication of JPS6462084A publication Critical patent/JPS6462084A/en
Pending legal-status Critical Current

Links

Landscapes

  • Details Of Television Scanning (AREA)

Abstract

PURPOSE:To prevent surely residual spot by changing a grid voltage in response to the power supply interruption so as to prevent an electron beam from being outputted from the cathode. CONSTITUTION:When the power is turned off, a switching element 29 is interrupted and almost no current flows to a voltage division resistor 27 and a brightness adjusting variable resistor 28 and a prescribed negative voltage outputted from the rectifier smoothing circuit 23 is fed directly to a grid terminal G1. Thus, the negative potential of the grid terminal G1 is reduced remarkably and the potential difference between the cathode 30 and the grid 36 is increased to interrupt the electron beam outputted from the cathode 30. Thus, the spot residual is prevented surely to extend the service life of the CRT 22.
JP21804087A 1987-09-02 1987-09-02 Spot killer circuit for crt Pending JPS6462084A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21804087A JPS6462084A (en) 1987-09-02 1987-09-02 Spot killer circuit for crt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21804087A JPS6462084A (en) 1987-09-02 1987-09-02 Spot killer circuit for crt

Publications (1)

Publication Number Publication Date
JPS6462084A true JPS6462084A (en) 1989-03-08

Family

ID=16713702

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21804087A Pending JPS6462084A (en) 1987-09-02 1987-09-02 Spot killer circuit for crt

Country Status (1)

Country Link
JP (1) JPS6462084A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007301925A (en) * 2006-05-15 2007-11-22 King Jim Co Ltd Document holder
JP2010069736A (en) * 2008-09-18 2010-04-02 Lihit Lab Inc File and binder

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57103472A (en) * 1981-10-30 1982-06-28 Matsushita Electric Ind Co Ltd Spot killer device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57103472A (en) * 1981-10-30 1982-06-28 Matsushita Electric Ind Co Ltd Spot killer device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007301925A (en) * 2006-05-15 2007-11-22 King Jim Co Ltd Document holder
JP2010069736A (en) * 2008-09-18 2010-04-02 Lihit Lab Inc File and binder

Similar Documents

Publication Publication Date Title
EP1057377B1 (en) Circuit arrangement
JPS57187849A (en) Electron gun
JPS6462084A (en) Spot killer circuit for crt
JPS55137837A (en) Wire cut type electric discharge machining
TW263594B (en) CRT driving circuit
UST961002I4 (en) Electron current regulator for an electron discharge device
JPS57152020A (en) Power supply circuit for device with small sized printer
KR930001704Y1 (en) Protecting circuit for crt
JPS6432766A (en) Spot killer circuit for cathode ray tube
JPS5711772A (en) Controller for output of welding power source
KR900009575Y1 (en) High voltage control circuit
US6956335B1 (en) Circuit arrangement
JPS57175261A (en) Detecting circuit for fluctuation of power supply
JPS6450720A (en) Controller for charging of secondary cell
JPS5467655A (en) Distribution line shortage protector
JPS57210550A (en) Power supply for electron gun
JPS5696450A (en) Direct current discharge lamp
KR960006098Y1 (en) Fbt for high voltage-discharge
JPS6444991A (en) Discharged lamp lighting circuit
JPS57202634A (en) Electron beam generator
JPH0755585Y2 (en) Fluorescent display tube drive circuit
JPS577270A (en) Electric dust catcher
JPS57103472A (en) Spot killer device
JPS54156362A (en) Discharge lamp lighting apparatus
JPS5763987A (en) Controller of white balance