[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

JPS5722269A - Electrophotographic method - Google Patents

Electrophotographic method

Info

Publication number
JPS5722269A
JPS5722269A JP9801880A JP9801880A JPS5722269A JP S5722269 A JPS5722269 A JP S5722269A JP 9801880 A JP9801880 A JP 9801880A JP 9801880 A JP9801880 A JP 9801880A JP S5722269 A JPS5722269 A JP S5722269A
Authority
JP
Japan
Prior art keywords
light
photoreceptor
surface potential
time
prescribed value
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
JP9801880A
Other languages
Japanese (ja)
Inventor
Hiroaki Tsuchiya
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 JP9801880A priority Critical patent/JPS5722269A/en
Publication of JPS5722269A publication Critical patent/JPS5722269A/en
Pending 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 stable image quality by adjusting the contrast of the saturated potentials of a bright part and dark part, then measuring the surface potential of a photoreceptor and determining the exposure of the original. CONSTITUTION:While voltage is being outputted to primary and secondary charger, the quantity of light of an exposure lamp 11 is set at an initial value. This is outputted to a D/A converter 24, and detection of surface potential and checking of whether the potential is a prescribed value or not are repeated. At this time, a CPU23 is kept ready to accept interruption, and in every time when a clock pulses enters, that is, in every time when a photoreceptor rotates by 1 deg., the quantity of light of an exposure lamp is lowered. When the surface potential attains a prescribed value, the clock pulses CK of the quantity equal to the photoreceptor angle between an electrometer and a secondary charger are applied to an initial value of the quantity of light. Thereby, the same quantity of light as the quantity of light irradiated to the part where the surface potential attained the prescribed value is irradiated to the photoreceptor.
JP9801880A 1980-07-17 1980-07-17 Electrophotographic method Pending JPS5722269A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9801880A JPS5722269A (en) 1980-07-17 1980-07-17 Electrophotographic method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9801880A JPS5722269A (en) 1980-07-17 1980-07-17 Electrophotographic method

Publications (1)

Publication Number Publication Date
JPS5722269A true JPS5722269A (en) 1982-02-05

Family

ID=14208103

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9801880A Pending JPS5722269A (en) 1980-07-17 1980-07-17 Electrophotographic method

Country Status (1)

Country Link
JP (1) JPS5722269A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58224355A (en) * 1982-06-24 1983-12-26 Ricoh Co Ltd Method for correcting surface potential of photoreceptor of electrophotographic copying machine
JPS6290671A (en) * 1985-10-17 1987-04-25 Fuji Xerox Co Ltd Exposure level control for copying machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58224355A (en) * 1982-06-24 1983-12-26 Ricoh Co Ltd Method for correcting surface potential of photoreceptor of electrophotographic copying machine
JPS6290671A (en) * 1985-10-17 1987-04-25 Fuji Xerox Co Ltd Exposure level control for copying machine

Similar Documents

Publication Publication Date Title
JPS55157756A (en) Surface potential control unit
JPS5518667A (en) Stabilization method of image density
JPS53136838A (en) Automatic controlling method of image quality in transfer type electrostatic copier
JPS5486347A (en) Development stabilizing system
JPS5363020A (en) Image control method
JPS5722269A (en) Electrophotographic method
JPS5740279A (en) Image stabilization method
ES8607577A1 (en) Method and device for getting a predetermined value of potential by the illumination of electrostatically charged photoconductive layers.
EP0098509A3 (en) Electrostatic field control method and apparatus
JPS57164739A (en) Copying apparatus
JPS5589885A (en) Photoreceptor replacing method
JPS5688142A (en) Image density control device
JPS5511226A (en) Electrostatic latent image developing method
JPS55117163A (en) Image forming device
FR2241101A2 (en) Electrophotographic reproduction using charged photoconductive film - uses simultaneous light and charge metering to obtain balanced optimum conditions
JPS57100445A (en) Image forming method of electrophotography
JPS5742056A (en) Electrostatic printing control method
JPS5735872A (en) Electrophotographic device
JPS5770555A (en) Copying machine
JPS5699357A (en) Charging voltage stabilization method for copying machine
JPS5517174A (en) Image stabilizing method
JPS5776564A (en) Control system of copy surface image
JPS5395042A (en) Method and apparatus for detecting toner quantity on photosensitive element
GB1485157A (en) Image recording method and apparatus for electrophotographic film
JPS5553365A (en) Electrophotographic apparatus