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JPS539416A - Contrast control unit - Google Patents

Contrast control unit

Info

Publication number
JPS539416A
JPS539416A JP8363276A JP8363276A JPS539416A JP S539416 A JPS539416 A JP S539416A JP 8363276 A JP8363276 A JP 8363276A JP 8363276 A JP8363276 A JP 8363276A JP S539416 A JPS539416 A JP S539416A
Authority
JP
Japan
Prior art keywords
control unit
contrast control
contrast
chaning
always keep
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
JP8363276A
Other languages
Japanese (ja)
Other versions
JPS5711542B2 (en
Inventor
Namio Yamaguchi
Sukeyuki Sato
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 JP8363276A priority Critical patent/JPS539416A/en
Publication of JPS539416A publication Critical patent/JPS539416A/en
Publication of JPS5711542B2 publication Critical patent/JPS5711542B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Picture Signal Circuits (AREA)
  • Television Receiver Circuits (AREA)

Abstract

PURPOSE: To always keep suitable brightness, by chaning the pedestal level with the contrast varied.
COPYRIGHT: (C)1978,JPO&Japio
JP8363276A 1976-07-13 1976-07-13 Contrast control unit Granted JPS539416A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8363276A JPS539416A (en) 1976-07-13 1976-07-13 Contrast control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8363276A JPS539416A (en) 1976-07-13 1976-07-13 Contrast control unit

Publications (2)

Publication Number Publication Date
JPS539416A true JPS539416A (en) 1978-01-27
JPS5711542B2 JPS5711542B2 (en) 1982-03-04

Family

ID=13807831

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8363276A Granted JPS539416A (en) 1976-07-13 1976-07-13 Contrast control unit

Country Status (1)

Country Link
JP (1) JPS539416A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6239835A (en) * 1985-08-14 1987-02-20 Shinko Electric Co Ltd Zoom lens system driving device for copying machine
JPH01170928A (en) * 1987-12-25 1989-07-06 Sharp Corp Optical system moving device for copying machine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5054941U (en) * 1973-09-20 1975-05-24

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5054941U (en) * 1973-09-20 1975-05-24

Also Published As

Publication number Publication date
JPS5711542B2 (en) 1982-03-04

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