JPS6471280A - On-screen display circuit - Google Patents

On-screen display circuit

Info

Publication number
JPS6471280A
JPS6471280A JP62226276A JP22627687A JPS6471280A JP S6471280 A JPS6471280 A JP S6471280A JP 62226276 A JP62226276 A JP 62226276A JP 22627687 A JP22627687 A JP 22627687A JP S6471280 A JPS6471280 A JP S6471280A
Authority
JP
Japan
Prior art keywords
circuit
signal
horizontal synchronizing
phase
synchronizing signal
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
JP62226276A
Other languages
Japanese (ja)
Inventor
Tomoyuki Hanai
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.)
NEC Home Electronics Ltd
NEC Corp
Original Assignee
NEC Home Electronics Ltd
Nippon Electric 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 NEC Home Electronics Ltd, Nippon Electric Co Ltd filed Critical NEC Home Electronics Ltd
Priority to JP62226276A priority Critical patent/JPS6471280A/en
Publication of JPS6471280A publication Critical patent/JPS6471280A/en
Pending legal-status Critical Current

Links

Landscapes

  • Studio Circuits (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

PURPOSE:To make the display stable by using an automatic frequency control circuit so as to change a horizontal synchronizing signal separated from a reproduced video signal into a horizontal signal without excess of synchronization or missing of it so as to supply the result onto an on-screen display means. CONSTITUTION:A phase locked loop circuit 5 changes a horizontal synchronizing signal separated from a reproduced video signal by a synchronizing separator circuit into a horizontal synchronizing signal without excess or missing of synchronization and supplies the result to a character signal generating circuit 3. The phase locked loop circuit 5 compares the phase of an output horizontal synchronizing signal with that of the oscillated output from a voltage controlled oscillator 7 by a phase comparator 6 and feeds back the obtained phase comparison error to the voltage controlled oscillator 7 via a low pass filter circuit 8.
JP62226276A 1987-09-11 1987-09-11 On-screen display circuit Pending JPS6471280A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62226276A JPS6471280A (en) 1987-09-11 1987-09-11 On-screen display circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62226276A JPS6471280A (en) 1987-09-11 1987-09-11 On-screen display circuit

Publications (1)

Publication Number Publication Date
JPS6471280A true JPS6471280A (en) 1989-03-16

Family

ID=16842673

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62226276A Pending JPS6471280A (en) 1987-09-11 1987-09-11 On-screen display circuit

Country Status (1)

Country Link
JP (1) JPS6471280A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7199834B2 (en) 2001-06-29 2007-04-03 Matsushita Electric Industrial Co., Ltd. Vertical synchronizing signal generation apparatus and video signal processing apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7199834B2 (en) 2001-06-29 2007-04-03 Matsushita Electric Industrial Co., Ltd. Vertical synchronizing signal generation apparatus and video signal processing apparatus

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