JPS5478013A - Screen position detector - Google Patents

Screen position detector

Info

Publication number
JPS5478013A
JPS5478013A JP14495577A JP14495577A JPS5478013A JP S5478013 A JPS5478013 A JP S5478013A JP 14495577 A JP14495577 A JP 14495577A JP 14495577 A JP14495577 A JP 14495577A JP S5478013 A JPS5478013 A JP S5478013A
Authority
JP
Japan
Prior art keywords
white
receiver
horizontal
screen
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
JP14495577A
Other languages
Japanese (ja)
Inventor
Tatsuo Sudo
Junichi Ogawa
Makoto Komaba
Hideyuki Maki
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 JP14495577A priority Critical patent/JPS5478013A/en
Publication of JPS5478013A publication Critical patent/JPS5478013A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To automatize quantitative measurement at a production time and improve precision by using a black-and-white TV camera to pick up the screen of a receiver and comparing left and right size marker signal positions with each other in respect to time. CONSTITUTION:White signal 5, which projects white raster throughout the available picture area, and signals 6 and 7, which project horizontal and vertical size markers in horizontal and vertical symmetrical positions in respect to the center of horizontal and vertical scanning periods respectively, are supplied to adjusted TV receiver 10 while being switched to pick up the screen by black-and-white TV camera 11. Then, times corresponding to the available picture area and size marker positions in picked-up output waveforms are measured by 16 to operate the time difference corresponding to the distance in 17, and the difference signal is outputted to detect the screen position by 20. Then, the difference signal is used to drive screen position adjustment mechanism 18 of receiver 10, thereby controlling so that the difference signal may be zero.
JP14495577A 1977-12-05 1977-12-05 Screen position detector Pending JPS5478013A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14495577A JPS5478013A (en) 1977-12-05 1977-12-05 Screen position detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14495577A JPS5478013A (en) 1977-12-05 1977-12-05 Screen position detector

Publications (1)

Publication Number Publication Date
JPS5478013A true JPS5478013A (en) 1979-06-21

Family

ID=15374070

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14495577A Pending JPS5478013A (en) 1977-12-05 1977-12-05 Screen position detector

Country Status (1)

Country Link
JP (1) JPS5478013A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008144748A (en) * 2006-12-08 2008-06-26 Taida Electronic Ind Co Ltd Airflow rectifying device and serial fan

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008144748A (en) * 2006-12-08 2008-06-26 Taida Electronic Ind Co Ltd Airflow rectifying device and serial fan

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