JPS5588470A - Correction circuit for vertical line distortion - Google Patents

Correction circuit for vertical line distortion

Info

Publication number
JPS5588470A
JPS5588470A JP16406778A JP16406778A JPS5588470A JP S5588470 A JPS5588470 A JP S5588470A JP 16406778 A JP16406778 A JP 16406778A JP 16406778 A JP16406778 A JP 16406778A JP S5588470 A JPS5588470 A JP S5588470A
Authority
JP
Japan
Prior art keywords
distortion
vertical line
correction
signal
correction 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.)
Granted
Application number
JP16406778A
Other languages
Japanese (ja)
Other versions
JPS6243390B2 (en
Inventor
Masao Kako
Kunio Ando
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 JP16406778A priority Critical patent/JPS5588470A/en
Publication of JPS5588470A publication Critical patent/JPS5588470A/en
Publication of JPS6243390B2 publication Critical patent/JPS6243390B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Details Of Television Scanning (AREA)

Abstract

PURPOSE:To reduce greatly the residual distortion by detecting the distortion amount of the vertical line with every scanning line and then giving the correction via the correction signal according to the detected distortion amount. CONSTITUTION:In case the vertical line distortion features the form of code 19, the phase difference is detected through time interval detector 15 between the horizontal synchronous signal and the first index signal within the same cycle starting at the horizontal synchronous signal and in repetition for the vertical cycle in order to detect the distortion amount of the vertical line. And now if the distortion amount at a-a', b-b' and c-c' are supposed to time tau1, tau2 and tau3 each after conversion of the time interval, these detection time are converted via pulse duration/amplitude converter 16 into the distortion correction signal featuring the amplitude variation with form 19 set as the envelope curve. Then this distortion correction signal is supplied to the base of transistor 10 of correction transformer 11 to carry out the vertical line distortion correction. The inverting circuit 17 is added to secure the reverse polarity since the polarity of the distortion correction signal is inverted. As a result, the residual distortion can be reduced greatly.
JP16406778A 1978-12-26 1978-12-26 Correction circuit for vertical line distortion Granted JPS5588470A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16406778A JPS5588470A (en) 1978-12-26 1978-12-26 Correction circuit for vertical line distortion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16406778A JPS5588470A (en) 1978-12-26 1978-12-26 Correction circuit for vertical line distortion

Publications (2)

Publication Number Publication Date
JPS5588470A true JPS5588470A (en) 1980-07-04
JPS6243390B2 JPS6243390B2 (en) 1987-09-14

Family

ID=15786144

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16406778A Granted JPS5588470A (en) 1978-12-26 1978-12-26 Correction circuit for vertical line distortion

Country Status (1)

Country Link
JP (1) JPS5588470A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55176664U (en) * 1979-06-01 1980-12-18
JPS55163949A (en) * 1979-06-08 1980-12-20 Sony Corp Stabilizing circuit for screen size

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55176664U (en) * 1979-06-01 1980-12-18
JPS55163949A (en) * 1979-06-08 1980-12-20 Sony Corp Stabilizing circuit for screen size

Also Published As

Publication number Publication date
JPS6243390B2 (en) 1987-09-14

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