JPS559546A - Device having light source for exposure - Google Patents

Device having light source for exposure

Info

Publication number
JPS559546A
JPS559546A JP8227578A JP8227578A JPS559546A JP S559546 A JPS559546 A JP S559546A JP 8227578 A JP8227578 A JP 8227578A JP 8227578 A JP8227578 A JP 8227578A JP S559546 A JPS559546 A JP S559546A
Authority
JP
Japan
Prior art keywords
variable resistor
light source
exposure
voltage
controlling
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
JP8227578A
Other languages
Japanese (ja)
Inventor
Masahito Ishida
Katsuyoshi Maejima
Hisashi Sakamaki
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP8227578A priority Critical patent/JPS559546A/en
Priority to GB7922040A priority patent/GB2024438B/en
Priority to US06/053,088 priority patent/US4320964A/en
Priority to DE2954647A priority patent/DE2954647C2/en
Priority to DE19792926360 priority patent/DE2926360A1/en
Publication of JPS559546A publication Critical patent/JPS559546A/en
Priority to GB08137971A priority patent/GB2108687B/en
Priority to GB08137972A priority patent/GB2108688B/en
Pending legal-status Critical Current

Links

Landscapes

  • Exposure Or Original Feeding In Electrophotography (AREA)

Abstract

PURPOSE:To prevent uneven exposure in lighting, by providing means for controlling the voltage to be applied to a light source in accordance with the control amount of light source light quantity to compensate the time from start of light source lighting to arrival at the predetermined light quantity. CONSTITUTION:As means for controlling the light quantity of an exposure light source, variable resistor VR2; variable resistor VR3 for finely controlling the exposure set with variable resistor VR2; variable resistor VR1 for defining the control range by variable resistor VR2; capacity C1 for composing a delay circuit; resistors R8 to R10; and variable resistor VR4, etc. are provided, and the voltage defined with variable resistors VR1, VR2, and VR3 is applied to operation amplifier Q3, and its voltage is produced from therminal T3.
JP8227578A 1978-06-30 1978-07-06 Device having light source for exposure Pending JPS559546A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
JP8227578A JPS559546A (en) 1978-07-06 1978-07-06 Device having light source for exposure
GB7922040A GB2024438B (en) 1978-06-30 1979-06-25 Electrophotographic copier
US06/053,088 US4320964A (en) 1978-06-30 1979-06-28 Image formation apparatus
DE2954647A DE2954647C2 (en) 1978-06-30 1979-06-29 Electrophotographic copier with lamp control circuit
DE19792926360 DE2926360A1 (en) 1978-06-30 1979-06-29 IMAGE GENERATION DEVICE
GB08137971A GB2108687B (en) 1978-06-30 1981-12-16 Electrophotographic copier
GB08137972A GB2108688B (en) 1978-06-30 1981-12-16 Electrophotographic copier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8227578A JPS559546A (en) 1978-07-06 1978-07-06 Device having light source for exposure

Publications (1)

Publication Number Publication Date
JPS559546A true JPS559546A (en) 1980-01-23

Family

ID=13769934

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8227578A Pending JPS559546A (en) 1978-06-30 1978-07-06 Device having light source for exposure

Country Status (1)

Country Link
JP (1) JPS559546A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57181539A (en) * 1981-04-30 1982-11-09 Ricoh Co Ltd Exposure controller for copying machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57181539A (en) * 1981-04-30 1982-11-09 Ricoh Co Ltd Exposure controller for copying machine

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