JPS6432768A - Fly-back line erasing circuit for cathode ray tube - Google Patents

Fly-back line erasing circuit for cathode ray tube

Info

Publication number
JPS6432768A
JPS6432768A JP18769387A JP18769387A JPS6432768A JP S6432768 A JPS6432768 A JP S6432768A JP 18769387 A JP18769387 A JP 18769387A JP 18769387 A JP18769387 A JP 18769387A JP S6432768 A JPS6432768 A JP S6432768A
Authority
JP
Japan
Prior art keywords
voltage
blanking pulse
condition
fly
ray tube
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
JP18769387A
Other languages
Japanese (ja)
Other versions
JPH0436629B2 (en
Inventor
Keiichi Kawamura
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.)
Nippon Chemi Con Corp
Original Assignee
Nippon Chemi Con 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 Nippon Chemi Con Corp filed Critical Nippon Chemi Con Corp
Priority to JP18769387A priority Critical patent/JPS6432768A/en
Publication of JPS6432768A publication Critical patent/JPS6432768A/en
Publication of JPH0436629B2 publication Critical patent/JPH0436629B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Transforming Electric Information Into Light Information (AREA)
  • Details Of Television Scanning (AREA)

Abstract

PURPOSE:To make proper and easy a fly-back line erasure based on the input of a blanking pulse by providing a switching circuit to change the division ratio of voltage divided circuit in accordance with the impressing of the blanking pulse so that an electric beam may not be discharged from the cathode of a cathode ray tube at the time of the generation of the blanking pulse. CONSTITUTION:In a condition in which the blanking pulse is not inputted to a transistor (TR)3, since a TR 2 is in an OFF-condition, a first grid G1 of a CRT is held at a prescribed bias voltage. Next, when the blanking pulse is inputted to the base of the TR 3, the TR 3 goes to an ON-condition, and its collector voltage V5 is reduced. A base voltage V4 of the TR 2 goes to a negative voltage, and sets the TR 2 to the ON-condition. As this result, a bias voltage V2 to the first grid G1 is increased to a negative direction, held at the cut-off voltage of the CRT or below, and a back-line erasing action can be attained stably and without fail.
JP18769387A 1987-07-29 1987-07-29 Fly-back line erasing circuit for cathode ray tube Granted JPS6432768A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18769387A JPS6432768A (en) 1987-07-29 1987-07-29 Fly-back line erasing circuit for cathode ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18769387A JPS6432768A (en) 1987-07-29 1987-07-29 Fly-back line erasing circuit for cathode ray tube

Publications (2)

Publication Number Publication Date
JPS6432768A true JPS6432768A (en) 1989-02-02
JPH0436629B2 JPH0436629B2 (en) 1992-06-16

Family

ID=16210498

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18769387A Granted JPS6432768A (en) 1987-07-29 1987-07-29 Fly-back line erasing circuit for cathode ray tube

Country Status (1)

Country Link
JP (1) JPS6432768A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53136026U (en) * 1977-04-01 1978-10-27
JPS5446079A (en) * 1977-09-20 1979-04-11 Leader Electronics Braun tube driving circuit
JPS583431A (en) * 1981-06-30 1983-01-10 Nec Corp Optical transmitter and receiver

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53136026U (en) * 1977-04-01 1978-10-27
JPS5446079A (en) * 1977-09-20 1979-04-11 Leader Electronics Braun tube driving circuit
JPS583431A (en) * 1981-06-30 1983-01-10 Nec Corp Optical transmitter and receiver

Also Published As

Publication number Publication date
JPH0436629B2 (en) 1992-06-16

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