JPS639208B2 - - Google Patents

Info

Publication number
JPS639208B2
JPS639208B2 JP55097202A JP9720280A JPS639208B2 JP S639208 B2 JPS639208 B2 JP S639208B2 JP 55097202 A JP55097202 A JP 55097202A JP 9720280 A JP9720280 A JP 9720280A JP S639208 B2 JPS639208 B2 JP S639208B2
Authority
JP
Japan
Prior art keywords
voltage
circuit
output
exposure lamp
transistor
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.)
Expired
Application number
JP55097202A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5722266A (en
Inventor
Takeshi Nozaki
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.)
Toshiba Corp
Original Assignee
Tokyo Shibaura Electric 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 Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Priority to JP9720280A priority Critical patent/JPS5722266A/ja
Publication of JPS5722266A publication Critical patent/JPS5722266A/ja
Publication of JPS639208B2 publication Critical patent/JPS639208B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Control Of Exposure In Printing And Copying (AREA)
  • Control Or Security For Electrophotography (AREA)
JP9720280A 1980-07-16 1980-07-16 Exposure control device for copying machine Granted JPS5722266A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9720280A JPS5722266A (en) 1980-07-16 1980-07-16 Exposure control device for copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9720280A JPS5722266A (en) 1980-07-16 1980-07-16 Exposure control device for copying machine

Publications (2)

Publication Number Publication Date
JPS5722266A JPS5722266A (en) 1982-02-05
JPS639208B2 true JPS639208B2 (de) 1988-02-26

Family

ID=14186016

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9720280A Granted JPS5722266A (en) 1980-07-16 1980-07-16 Exposure control device for copying machine

Country Status (1)

Country Link
JP (1) JPS5722266A (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0722843A (ja) * 1993-06-30 1995-01-24 Nec Corp 変調度制御回路

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5182630A (de) * 1975-01-16 1976-07-20 Minolta Camera Kk

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5182630A (de) * 1975-01-16 1976-07-20 Minolta Camera Kk

Also Published As

Publication number Publication date
JPS5722266A (en) 1982-02-05

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