JPS5697356A - Latent image stabilizing method - Google Patents
Latent image stabilizing methodInfo
- Publication number
- JPS5697356A JPS5697356A JP17320879A JP17320879A JPS5697356A JP S5697356 A JPS5697356 A JP S5697356A JP 17320879 A JP17320879 A JP 17320879A JP 17320879 A JP17320879 A JP 17320879A JP S5697356 A JPS5697356 A JP S5697356A
- Authority
- JP
- Japan
- Prior art keywords
- latent image
- surface potential
- image
- comparator
- output
- 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
Links
Landscapes
- Electrophotography Using Other Than Carlson'S Method (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
PURPOSE: To stabilize deepness of a latent image and to enhance image quality, by controlling a driver for forming a latent image by output of a comparator.
CONSTITUTION: Surface potential due to uniform charging of photoconductive layer 1 is measured with first potential measuring sensor 14, and area occupied by an image is obtained by adding with adder 18 the dot number of a dot pattern produced with character generating device 15. Drop ratio of the surface potential is computed from this image area. The mean surface potential of layer 1 after formation of a latent image is measured with second potential measuring sensor 21, and the measured mean surface potential is divided by the drop ratio of the surface potential with divider 20. The output of sensor 14 are compared with that of divider 20 by means of comparator 22, and driver 16 for forming the latent image is controlled with the output of this comparator 22, thus permitting deepness of the latent image to be stabilized.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17320879A JPS5697356A (en) | 1979-12-30 | 1979-12-30 | Latent image stabilizing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17320879A JPS5697356A (en) | 1979-12-30 | 1979-12-30 | Latent image stabilizing method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5697356A true JPS5697356A (en) | 1981-08-06 |
Family
ID=15956111
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17320879A Pending JPS5697356A (en) | 1979-12-30 | 1979-12-30 | Latent image stabilizing method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5697356A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01315773A (en) * | 1988-03-25 | 1989-12-20 | Ricoh Co Ltd | Copying machine |
US5182596A (en) * | 1990-07-20 | 1993-01-26 | Hitachi Koki Co., Ltd. | Device for measuring surface potentials at photosensitive body and electrostatic recording apparatus using said device |
US6285385B1 (en) * | 1998-12-25 | 2001-09-04 | Canon Kabushiki Kaisha | Electrophotographic method and apparatus which employs light beam irradiation to form an electrostatic image on a surface of a photosensitive member |
-
1979
- 1979-12-30 JP JP17320879A patent/JPS5697356A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01315773A (en) * | 1988-03-25 | 1989-12-20 | Ricoh Co Ltd | Copying machine |
US5182596A (en) * | 1990-07-20 | 1993-01-26 | Hitachi Koki Co., Ltd. | Device for measuring surface potentials at photosensitive body and electrostatic recording apparatus using said device |
US6285385B1 (en) * | 1998-12-25 | 2001-09-04 | Canon Kabushiki Kaisha | Electrophotographic method and apparatus which employs light beam irradiation to form an electrostatic image on a surface of a photosensitive member |
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