JPS5483721A - Automatic regulator for tri-color luminance of color television - Google Patents

Automatic regulator for tri-color luminance of color television

Info

Publication number
JPS5483721A
JPS5483721A JP15120877A JP15120877A JPS5483721A JP S5483721 A JPS5483721 A JP S5483721A JP 15120877 A JP15120877 A JP 15120877A JP 15120877 A JP15120877 A JP 15120877A JP S5483721 A JPS5483721 A JP S5483721A
Authority
JP
Japan
Prior art keywords
color
luminance
tri
output
regulator
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
JP15120877A
Other languages
Japanese (ja)
Inventor
Ikuo Kawaguchi
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 JP15120877A priority Critical patent/JPS5483721A/en
Publication of JPS5483721A publication Critical patent/JPS5483721A/en
Pending legal-status Critical Current

Links

Landscapes

  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)

Abstract

PURPOSE: To automize the tri-color adjustment of a color cathode-ray tube by providing an automatic luminance regulator.
CONSTITUTION: Screen luminance signal 7, the output of an ITV camera picture- taking the screen luminance of a color cathode-ray tube is supplied to buffer amplifier 11 of automatic regulator 3 for tri-color luminance. The output of amplifier 11 is compared with upper and lower-limit set levels by level comparators 16 and 17 of tri-color regulator circuits 12, 13 and 14 for red, green and blue colors. A positive rotary signal with the detection above the upper limit level or negative rotary signal with it below the lower limit level is supplied to pulse motor driver circuit 21 via gate 20. Depending upon the output of driver circuit 21, pulse motor 22 rotates positively or negatively to rotate adjustment volume 5, thereby adjusting a luminance current flowing to transistor 6.
COPYRIGHT: (C)1979,JPO&Japio
JP15120877A 1977-12-17 1977-12-17 Automatic regulator for tri-color luminance of color television Pending JPS5483721A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15120877A JPS5483721A (en) 1977-12-17 1977-12-17 Automatic regulator for tri-color luminance of color television

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15120877A JPS5483721A (en) 1977-12-17 1977-12-17 Automatic regulator for tri-color luminance of color television

Publications (1)

Publication Number Publication Date
JPS5483721A true JPS5483721A (en) 1979-07-04

Family

ID=15513590

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15120877A Pending JPS5483721A (en) 1977-12-17 1977-12-17 Automatic regulator for tri-color luminance of color television

Country Status (1)

Country Link
JP (1) JPS5483721A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0385990A (en) * 1989-08-30 1991-04-11 Pioneer Electron Corp Picture quality adjustment system and picture quality adjusting device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5171729A (en) * 1974-12-19 1976-06-21 Matsushita Electric Ind Co Ltd HOWAITOBARANSUCHOSEISOCHI

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5171729A (en) * 1974-12-19 1976-06-21 Matsushita Electric Ind Co Ltd HOWAITOBARANSUCHOSEISOCHI

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0385990A (en) * 1989-08-30 1991-04-11 Pioneer Electron Corp Picture quality adjustment system and picture quality adjusting device

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