JPS5722271A - Electrophotographic method - Google Patents

Electrophotographic method

Info

Publication number
JPS5722271A
JPS5722271A JP9802080A JP9802080A JPS5722271A JP S5722271 A JPS5722271 A JP S5722271A JP 9802080 A JP9802080 A JP 9802080A JP 9802080 A JP9802080 A JP 9802080A JP S5722271 A JPS5722271 A JP S5722271A
Authority
JP
Japan
Prior art keywords
exposure
potential
lamp
photoreceptor
detected
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
JP9802080A
Other languages
Japanese (ja)
Other versions
JPH0368388B2 (en
Inventor
Hiroaki Tsuchiya
Shinkichi Takahashi
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 JP9802080A priority Critical patent/JPS5722271A/en
Publication of JPS5722271A publication Critical patent/JPS5722271A/en
Publication of JPH0368388B2 publication Critical patent/JPH0368388B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/04—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material
    • G03G15/043—Apparatus for electrographic processes using a charge pattern for exposing, i.e. imagewise exposure by optically projecting the original image on a photoconductive recording material with means for controlling illumination or exposure

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To obtain the image quality having proper densities free from any photographic fog by determining the exposure at the image exposing based on the inclination of the characteristics of the exposure surface potential of a photoreceptor. CONSTITUTION:The potential on a photoreceptor 1 is detected with a potential sensor 7 between a full surface exposure lamp 4 and a developing electrode 5, and the output of a high voltage transformer 9 is regulated. Next,exposure is performed by changing the exposure of an original exposure lamp 11 irradiating a standard white plate 10 other than an image area. The reflected light from the white plate 10 is conducted via mirrors 12, 13 onto the photoreceptor 1, and the potentials corresponding to the respective exposure thereof are detected respectively with the sensor 7. A circuit 8 controls a lamp lighting circuit 14 based on the detection signals thereof in such a way that the white ground potential attains a target value. Again the white 10 is irradiated by the lamp 11 lighted by the output of the circuit 14, and the formed potential is detected. The voltge adequate for prevention of photographic fogs is applied to a developing electrode 5.
JP9802080A 1980-07-17 1980-07-17 Electrophotographic method Granted JPS5722271A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9802080A JPS5722271A (en) 1980-07-17 1980-07-17 Electrophotographic method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9802080A JPS5722271A (en) 1980-07-17 1980-07-17 Electrophotographic method

Publications (2)

Publication Number Publication Date
JPS5722271A true JPS5722271A (en) 1982-02-05
JPH0368388B2 JPH0368388B2 (en) 1991-10-28

Family

ID=14208181

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9802080A Granted JPS5722271A (en) 1980-07-17 1980-07-17 Electrophotographic method

Country Status (1)

Country Link
JP (1) JPS5722271A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS543540A (en) * 1977-06-10 1979-01-11 Canon Inc Automatic exposure device
JPS5410743A (en) * 1977-06-27 1979-01-26 Canon Inc Image forming apparatus
JPS5529861A (en) * 1978-08-24 1980-03-03 Canon Inc Electrostatic recorder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS543540A (en) * 1977-06-10 1979-01-11 Canon Inc Automatic exposure device
JPS5410743A (en) * 1977-06-27 1979-01-26 Canon Inc Image forming apparatus
JPS5529861A (en) * 1978-08-24 1980-03-03 Canon Inc Electrostatic recorder

Also Published As

Publication number Publication date
JPH0368388B2 (en) 1991-10-28

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