JPS5255425A - Focus voltage control system - Google Patents

Focus voltage control system

Info

Publication number
JPS5255425A
JPS5255425A JP50131591A JP13159175A JPS5255425A JP S5255425 A JPS5255425 A JP S5255425A JP 50131591 A JP50131591 A JP 50131591A JP 13159175 A JP13159175 A JP 13159175A JP S5255425 A JPS5255425 A JP S5255425A
Authority
JP
Japan
Prior art keywords
focus voltage
control system
voltage control
luminance
cathode
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
JP50131591A
Other languages
Japanese (ja)
Inventor
Norio Kawaguchi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP50131591A priority Critical patent/JPS5255425A/en
Publication of JPS5255425A publication Critical patent/JPS5255425A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE:The focus voltage is controlled to the most appropriate value with use of luminance measurement instrument which is installed symmetrically to the picture area of cathode-ray tube. Thus, the luminance dispersion of TV receiver can be effectively prevented in the case of mass production.
JP50131591A 1975-10-31 1975-10-31 Focus voltage control system Pending JPS5255425A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP50131591A JPS5255425A (en) 1975-10-31 1975-10-31 Focus voltage control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50131591A JPS5255425A (en) 1975-10-31 1975-10-31 Focus voltage control system

Publications (1)

Publication Number Publication Date
JPS5255425A true JPS5255425A (en) 1977-05-06

Family

ID=15061622

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50131591A Pending JPS5255425A (en) 1975-10-31 1975-10-31 Focus voltage control system

Country Status (1)

Country Link
JP (1) JPS5255425A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4387394A (en) * 1980-12-31 1983-06-07 Rca Corporation Sensing focus of a color kinescope
JPH0334681A (en) * 1989-06-30 1991-02-14 Sony Corp Focus detection system and focus adjustor for cathode-ray tube

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5034125A (en) * 1973-07-27 1975-04-02

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5034125A (en) * 1973-07-27 1975-04-02

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4387394A (en) * 1980-12-31 1983-06-07 Rca Corporation Sensing focus of a color kinescope
JPH0334681A (en) * 1989-06-30 1991-02-14 Sony Corp Focus detection system and focus adjustor for cathode-ray tube

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