JPS5516507A - Detector for vertical center position on television picture screen - Google Patents

Detector for vertical center position on television picture screen

Info

Publication number
JPS5516507A
JPS5516507A JP8777778A JP8777778A JPS5516507A JP S5516507 A JPS5516507 A JP S5516507A JP 8777778 A JP8777778 A JP 8777778A JP 8777778 A JP8777778 A JP 8777778A JP S5516507 A JPS5516507 A JP S5516507A
Authority
JP
Japan
Prior art keywords
center position
screen
vertical center
vertical
detected
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
JP8777778A
Other languages
Japanese (ja)
Inventor
Mitsuzo Nakahata
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 JP8777778A priority Critical patent/JPS5516507A/en
Publication of JPS5516507A publication Critical patent/JPS5516507A/en
Pending legal-status Critical Current

Links

Landscapes

  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Details Of Television Scanning (AREA)

Abstract

PURPOSE: To detect and adjust the vertical center position of a picture screen at a high speed and with high precision.
CONSTITUTION: While no video signal arrives from the antenna terminal after the vertically-synchronous tuning of a TV screen to be tested, the vertical free oscillation frequency of the TV chassis circuit is detected by the deflecting-yoke leakage magnetic field detection coil to obtain a difference with the center value of a vertically-synchronous tunable frequency. Next, center-position variation value Δl1 in the vertical direction of the screen corresponding to this difference is calculated through conversion. Next, a horizontal-light pattern inserted at the vertical center position of a signal is displayed on the screen and then detected by using a TV camera to obtain shift value Δl0 from the geometric center position of the screen and this is corrected by using Δl1, thereby deciding on and displaying whether the vertical center position has been adjusted into a fixed range or not.
COPYRIGHT: (C)1980,JPO&Japio
JP8777778A 1978-07-20 1978-07-20 Detector for vertical center position on television picture screen Pending JPS5516507A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8777778A JPS5516507A (en) 1978-07-20 1978-07-20 Detector for vertical center position on television picture screen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8777778A JPS5516507A (en) 1978-07-20 1978-07-20 Detector for vertical center position on television picture screen

Publications (1)

Publication Number Publication Date
JPS5516507A true JPS5516507A (en) 1980-02-05

Family

ID=13924403

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8777778A Pending JPS5516507A (en) 1978-07-20 1978-07-20 Detector for vertical center position on television picture screen

Country Status (1)

Country Link
JP (1) JPS5516507A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61278275A (en) * 1985-06-03 1986-12-09 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Automatic display screen adjustor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61278275A (en) * 1985-06-03 1986-12-09 インタ−ナショナル　ビジネス　マシ−ンズ　コ−ポレ−ション Automatic display screen adjustor

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