US5392098A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic apparatus with amorphous silicon-carbon photosensitive member driven relative to light source
Assignee: Canon Inc
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Filing: 1992-05-29
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Granted: 1995-02-21
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Expires: 2012-05-29
Abstract
Abstract An electrophotographic apparatus includes an amorphous silicon electrophotographic photosensitive member thereon having a conductive base, a photoconductive layer thereon containing carbon atoms, a content of which is minimum adjacent a position closest to the surface layer and/or other atoms, and a surface layer thereon containing 40-90 atomic % of carbon atoms and/or other atoms; a light source for electric discharge driven through a pulse width modulation using a reference wave having a frequency of not higher than 10 kHz; a device for projecting information light onto the photosensitive member; and a driver for driving the photosensitive member relative to the light source at such a speed that a peripheral speed of the photosensitive member divided by the frequency of the reference wave is not more than 1 mm.
Inventors
- 👤 Toshiyuki Ehara
- 👤 Koji Yamazaki
- 👤 Shigenori Ueda
- 👤 Hitoshi Murayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:59
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/50; G03G15/5008; G03G21/00; G03G21/06; G03G21/08; G03G5/00; G03G5/02; G03G5/04; G03G5/08; G03G5/082; G03G5/08214; G03G5/08221; G03G5/08228
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
173 words
An electrophotographic apparatus comprising: an amorphous silicon electrophotographic photosensitive member having a conductive base, a photoconductive layer thereon and a surface layer thereon, wherein said photoconductive layer contains carbon atoms, a content of which is minimum adjacent a position closest to the surface layer, and the surface layer contains 40-90 atomic % of carbon atoms; a discharging light source for electric discharge driven through a pulse width modulation using a reference wave having a frequency of not higher than 10 kHz; charging means for charging said photosensitive member at a position downstream of said light source with respect to a movement direction of said photosensitive member; means for projecting information light onto said photosensitive member; and at a position downstream of said charging means with respect to the moving direction of said photosensitive member; and driving means for driving said photosensitive member relative to the light source at such a speed that a peripheral speed of said photosensitive member divided by the frequency of the reference wave is not more than 1 mm.
Claim 2
Dependent Claim
173 words
An electrophotographic apparatus comprising: an amorphous silicon electrophotographic photosensitive member having a conductive base, a photoconductive layer thereon and a surface layer thereon, wherein said photoconductive layer contains carbon atoms, a content of which is minimum adjacent a position closest to the surface layer, and the surface layer contains 40-90 atomic % of carbon atoms; a discharging light source for electric discharge driven through a pulse width modulation using a reference wave having a frequency of not higher than 10 kHz; charging means for charging said photosensitive member at a position downstream of said light source with respect to a movement direction of said photosensitive member; means for projecting information light onto said photosensitive member; and at a position downstream of said charging means with respect to the moving direction of said photosensitive member; and driving means for driving said photosensitive member relative to the light source at such a speed that a peripheral speed of said photosensitive member divided by the frequency of the reference wave is not more than 1 mm.
Claim 3
Dependent Claim
183 words
An electrophotographic apparatus comprising: an amorphous silicon electrophotographic photosensitive member having a conductive base, a photoconductive layer thereon and a surface layer thereon, wherein said photoconductive layer contains carbon atoms, a content of which is minimum adjacent a position closest to the surface layer, and the surface layer contains carbon atoms, nitrogen atoms and oxygen atoms, a sum of contents of which is 40-90 atomic %; a discharging light source for electric discharge driven through a pulse width modulation using a reference wave having a frequency of not higher than 10 kHz; charging means for charging said photosensitive member at a position downstream of said light source with respect to a movement direction of said photosensitive member; means for projecting information light onto said photosensitive member at a position downstream of said charging means with respect to the moving direction of said photosensitive member; and driving means for driving said photosensitive member relative to the light source at such a speed that a peripheral speed of said photosensitive member divided by the frequency of the reference wave is not more than 1 mm.
Claim 4
Dependent Claim
183 words
An electrophotographic apparatus comprising: an amorphous silicon electrophotographic photosensitive member having a conductive base, a photoconductive layer thereon and a surface layer thereon, wherein said photoconductive layer contains carbon atoms, a content of which is minimum adjacent a position closest to the surface layer, and the surface layer contains carbon atoms, nitrogen atoms and oxygen atoms, a sum of contents of which is 40-90 atomic %; a discharging light source for electric discharge driven through a pulse width modulation using a reference wave having a frequency of not higher than 10 kHz; charging means for charging said photosensitive member at a position downstream of said light source with respect to a movement direction of said photosensitive member; means for projecting information light onto said photosensitive member at a position downstream of said charging means with respect to the moving direction of said photosensitive member; and driving means for driving said photosensitive member relative to the light source at such a speed that a peripheral speed of said photosensitive member divided by the frequency of the reference wave is not more than 1 mm.
Claim 5
Dependent Claim
189 words
An electrophotographic apparatus comprising: an amorphous silicon electrophotographic photosensitive member having a conductive base, a photoconductive layer thereon and a surface layer thereon, wherein said photoconductive layer contains carbon atoms, a content of which is minimum adjacent a position closest to the surface layer and fluorine atoms, a content of which is maximum adjacent the position closest to the surface layer, and the surface layer contains 40-90 atomic % of carbon atoms; a discharging light source for electric discharge driven through a pulse width modulation using a reference wave having a frequency of not higher than 10 kHz; charging means for charging said photosensitive member at a position downstream of said light source with respect to a movement direction of said photosensitive member; means for projecting information light onto said photosensitive member at a position downstream of said charging means with respect to the moving direction of said photosensitive member; and driving means for driving said photosensitive member relative to the light source at such a speed that a peripheral speed of said photosensitive member divided by the frequency of the reference wave is not more than 1 mm.
Claim 6
Dependent Claim
189 words
An electrophotographic apparatus comprising: an amorphous silicon electrophotographic photosensitive member having a conductive base, a photoconductive layer thereon and a surface layer thereon, wherein said photoconductive layer contains carbon atoms, a content of which is minimum adjacent a position closest to the surface layer and fluorine atoms, a content of which is maximum adjacent the position closest to the surface layer, and the surface layer contains 40-90 atomic % of carbon atoms; a discharging light source for electric discharge driven through a pulse width modulation using a reference wave having a frequency of not higher than 10 kHz; charging means for charging said photosensitive member at a position downstream of said light source with respect to a movement direction of said photosensitive member; means for projecting information light onto said photosensitive member at a position downstream of said charging means with respect to the moving direction of said photosensitive member; and driving means for driving said photosensitive member relative to the light source at such a speed that a peripheral speed of said photosensitive member divided by the frequency of the reference wave is not more than 1 mm.
Claim 7
Dependent Claim
198 words
An electrophotographic apparatus comprising: an amorphous silicon electrophotographic photosensitive member having a conductive base, a photoconductive layer and a surface layer, wherein the photoconductive layer contains carbon atoms, a content of which is minimum adjacent a position closest to the surface layer and fluorine atoms, a content of which is maximum adjacent a position closest to the surface layer, and the surface layer contains carbon atoms; nitrogen atoms and oxygen atoms, a sum of contents of which is 40-90% atomic %; a discharging light source for electric discharge driven through a pulse width modulation using a reference wave having a frequency of not higher than 10 kHz; charging means for charging said photosensitive member at a position downstream of said light source with respect to a movement direction of said photosensitive member; means for projecting information light onto said photosensitive member at a position downstream of said charging means with respect to the moving direction of said photosensitive member; and driving means for driving said photosensitive member relative to the light source at such a speed that a peripheral speed of said photosensitive member divided by the frequency of the reference wave is not more than 1 mm.
Claim 8
Dependent Claim
198 words
An electrophotographic apparatus comprising: an amorphous silicon electrophotographic photosensitive member having a conductive base, a photoconductive layer and a surface layer, wherein the photoconductive layer contains carbon atoms, a content of which is minimum adjacent a position closest to the surface layer and fluorine atoms, a content of which is maximum adjacent a position closest to the surface layer, and the surface layer contains carbon atoms; nitrogen atoms and oxygen atoms, a sum of contents of which is 40-90% atomic %; a discharging light source for electric discharge driven through a pulse width modulation using a reference wave having a frequency of not higher than 10 kHz; charging means for charging said photosensitive member at a position downstream of said light source with respect to a movement direction of said photosensitive member; means for projecting information light onto said photosensitive member at a position downstream of said charging means with respect to the moving direction of said photosensitive member; and driving means for driving said photosensitive member relative to the light source at such a speed that a peripheral speed of said photosensitive member divided by the frequency of the reference wave is not more than 1 mm.
Claim 9
Dependent Claim
186 words
An electrophotographic apparatus comprising: an amorphous silicon electrophotographic photosensitive member having a conductive base, a photoconductive layer and a surface layer, the photoconductive layer contains carbon atoms, a content of which is minimum adjacent a position closest to the surface layer and 10-5000 atomic ppm of oxygen atoms, the surface layer contains carbon atoms, nitrogen atoms and oxygen atoms, a sum of contents of which is 40-90 atomic %; a discharging light source for electric discharge driven through a pulse width modulation using a reference wave having a frequency of not higher than 10 kHz; charging means for charging said photosensitive member at a position downstream of said light source with respect to a movement direction of said photosensitive member; means for projecting information light onto said photosensitive member at a position downstream of said charging means with respect to the moving direction of said photosensitive member; and driving means for driving said photosensitive member relative to the light source at such a speed that a peripheral speed of said photosensitive member divided by the frequency of the reference wave is not more than 1 mm.
Claim 10
Dependent Claim
186 words
An electrophotographic apparatus comprising: an amorphous silicon electrophotographic photosensitive member having a conductive base, a photoconductive layer and a surface layer, the photoconductive layer contains carbon atoms, a content of which is minimum adjacent a position closest to the surface layer and 10-5000 atomic ppm of oxygen atoms, the surface layer contains carbon atoms, nitrogen atoms and oxygen atoms, a sum of contents of which is 40-90 atomic %; a discharging light source for electric discharge driven through a pulse width modulation using a reference wave having a frequency of not higher than 10 kHz; charging means for charging said photosensitive member at a position downstream of said light source with respect to a movement direction of said photosensitive member; means for projecting information light onto said photosensitive member at a position downstream of said charging means with respect to the moving direction of said photosensitive member; and driving means for driving said photosensitive member relative to the light source at such a speed that a peripheral speed of said photosensitive member divided by the frequency of the reference wave is not more than 1 mm.
Claim 11
Dependent Claim
204 words
An electrophotographic apparatus comprising: an amorphous silicon electrophotographic photosensitive member having a conductive base, a photoconductive layer and a surface layer, wherein the photoconductive layer contains carbon atoms, a content of which is minimum adjacent a position closest to the surface layer, 10-5000 atomic ppm of oxygen atoms and fluorine atoms, a content of which is maximum adjacent a position closest to the surface layer, and the surface layer contains carbon atoms, nitrogen atoms and oxygen atoms, a sum of contents of which is 40-90% atomic %; a discharging light source for electric discharge driven through a pulse width modulation using a reference wave having a frequency of not higher than 10 kHz; charging means for charging said photosensitive member at a position downstream of said light source with respect to a movement direction of said photosensitive member; means for projecting information light onto said photosensitive member at a position downstream of said charging means with respect to the moving direction of said photosensitive member; and driving means for driving said photosensitive member relative to the light source at such a speed that a peripheral speed of said photosensitive member divided by the frequency of the reference wave is not more than 1 mm.
Claim 12
Dependent Claim
204 words
An electrophotographic apparatus comprising: an amorphous silicon electrophotographic photosensitive member having a conductive base, a photoconductive layer and a surface layer, wherein the photoconductive layer contains carbon atoms, a content of which is minimum adjacent a position closest to the surface layer, 10-5000 atomic ppm of oxygen atoms and fluorine atoms, a content of which is maximum adjacent a position closest to the surface layer, and the surface layer contains carbon atoms, nitrogen atoms and oxygen atoms, a sum of contents of which is 40-90% atomic %; a discharging light source for electric discharge driven through a pulse width modulation using a reference wave having a frequency of not higher than 10 kHz; charging means for charging said photosensitive member at a position downstream of said light source with respect to a movement direction of said photosensitive member; means for projecting information light onto said photosensitive member at a position downstream of said charging means with respect to the moving direction of said photosensitive member; and driving means for driving said photosensitive member relative to the light source at such a speed that a peripheral speed of said photosensitive member divided by the frequency of the reference wave is not more than 1 mm.
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