US4439504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic photosensitive member and color electrophotographic process
Assignee: Canon Inc
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Filing: 1981-09-14
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Granted: 1984-03-27
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Expires: 2001-09-14
Abstract
Abstract A color electrophotographic process comprises applying voltage between a non-transparent electrode and a color filter electrode of an electrophotographic photosensitive member comprising isolated conductive members forming picture elements, a photoconductive layer, non-transparent electrodes and color filter electrodes, conducting imagewise exposure from the side where color filter electrodes are arranged, resulting in formation of a difference in distribution voltage between the area wherein light passes through the color filter electrode and the area wherein light does not pass through the color filter electrode with regard to the voltage distribution between the non-transparent electrode and the isolated conductive member and between the color filter electrode and the isolated conductive member, thereby forming a voltage image depending upon the change of the voltage of the isolated conductive member caused corresponding to a difference in distribution voltage, and developing said voltage image with a color toner corresponding to a color light passing through the color filter electrode. Further there is disclosed an electrophotographic photosensitive member for a color electrophotographic process as mentioned above.
Inventors
- 👤 Shunichi Ishihara
- 👤 Nobuo Kitajima
- 👤 Yuji Nishigaki
- 👤 Nobuko Kitahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:46
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/01; G03G5/00; G03G5/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
154 words
A color electrophotographic process which comprises: applying voltage between a non-transparent electrode and a color filter electrode of an electrophotographic photosensitive member comprising isolated conductive members forming picture elements, a photoconductive layer, non-transparent electrodes and color filter electrodes; conducting imagewise exposure from the side where color filter electrodes are arranged, resulting in formation of a difference in distribution voltage between the area wherein light passes through the color filter electrode and the area wherein light does not pass through the color filter electrode with regard to the voltage distribution between the non-transparent electrode and the isolated conductive member and between the color filter electrode and the isolated conductive member; thereby forming a voltage image depending upon the change of the voltage of the isolated conductive member caused corresponding to a difference in distribution voltage; and developing said voltage image with a color toner corresponding to a color light passing through the color filter electrode.
Claim 2
Dependent Claim
154 words
A color electrophotographic process which comprises: applying voltage between a non-transparent electrode and a color filter electrode of an electrophotographic photosensitive member comprising isolated conductive members forming picture elements, a photoconductive layer, non-transparent electrodes and color filter electrodes; conducting imagewise exposure from the side where color filter electrodes are arranged, resulting in formation of a difference in distribution voltage between the area wherein light passes through the color filter electrode and the area wherein light does not pass through the color filter electrode with regard to the voltage distribution between the non-transparent electrode and the isolated conductive member and between the color filter electrode and the isolated conductive member; thereby forming a voltage image depending upon the change of the voltage of the isolated conductive member caused corresponding to a difference in distribution voltage; and developing said voltage image with a color toner corresponding to a color light passing through the color filter electrode.
Claim 3
Dependent Claim
274 words
A color electrophotographic process which comprises: a step comprising applying voltage between a non-transparent electrode and a color filter electrode of an electrophotographic photosensitive member comprising isolated conductive members forming picture elements, a photoconductive layer, transparent electrodes, non-transparent electrodes and color filter electrodes, conducting imagewise exposure from the side where color filter electrodes are arranged, resulting in formation of a difference in distribution voltage between the area wherein light passes through the color filter electrode and the area wherein light does not pass through the color filter electrode with regard to the voltage distribution between the non-transparent electrode and the isolated conductive member and between the color filter electrode and the isolated conductive member, thereby forming a voltage image depending upon the change of the voltage of the isolated conductive member caused corresponding to a difference in distribution voltage, and developing said voltage image with a color toner corresponding to a color light passing through the color filter electrode; and a step comprising applying voltage between a transparent electrode and a non-transparent electrode, conducting imagewise exposure from the side where non-transparent electrodes are arranged, resulting in formation of a difference in distribution voltage between the area wherein light passes through the transparent electrode and the area wherein light does not pass through the transparent electrode with regard to the voltage distribution between the non-transparent electrode and the isolated conductive member and between the transparent electrode and the isolated conductive member, thereby forming a voltage image depending upon the change of the voltage of the isolated conductive member caused corresponding to a difference in distribution voltage, and developing said voltage image with a black toner.
Claim 4
Dependent Claim
274 words
A color electrophotographic process which comprises: a step comprising applying voltage between a non-transparent electrode and a color filter electrode of an electrophotographic photosensitive member comprising isolated conductive members forming picture elements, a photoconductive layer, transparent electrodes, non-transparent electrodes and color filter electrodes, conducting imagewise exposure from the side where color filter electrodes are arranged, resulting in formation of a difference in distribution voltage between the area wherein light passes through the color filter electrode and the area wherein light does not pass through the color filter electrode with regard to the voltage distribution between the non-transparent electrode and the isolated conductive member and between the color filter electrode and the isolated conductive member, thereby forming a voltage image depending upon the change of the voltage of the isolated conductive member caused corresponding to a difference in distribution voltage, and developing said voltage image with a color toner corresponding to a color light passing through the color filter electrode; and a step comprising applying voltage between a transparent electrode and a non-transparent electrode, conducting imagewise exposure from the side where non-transparent electrodes are arranged, resulting in formation of a difference in distribution voltage between the area wherein light passes through the transparent electrode and the area wherein light does not pass through the transparent electrode with regard to the voltage distribution between the non-transparent electrode and the isolated conductive member and between the transparent electrode and the isolated conductive member, thereby forming a voltage image depending upon the change of the voltage of the isolated conductive member caused corresponding to a difference in distribution voltage, and developing said voltage image with a black toner.
Claim 5
Dependent Claim
33 words
An electrophotographic photosensitive member for the color electrophotographic process as defined in claim 1 or 2 which comprises isolated conductive members forming picture elements, a photoconductive layer, non-transparent electrodes and color filter electrodes.
Claim 6
Dependent Claim
13 words
An electrophotographic photosensitive member according to claim 3 wherein transparent electrodes are provided.
Claim 7
Dependent Claim
23 words
An electrophotographic photosensitive member which essentially consists of isolated conductive members forming picture elements, a photoconductive layer, non-transparent electrodes and color filter electrodes.
Claim 8
Dependent Claim
23 words
An electrophotographic photosensitive member which essentially consists of isolated conductive members forming picture elements, a photoconductive layer, non-transparent electrodes and color filter electrodes.
Claim 9
Dependent Claim
40 words
An electrophotographic photosensitive member which comprises isolated conductive members forming picture elements, a photoconductive layer, non-transparent electrodes and color filter electrodes, one non-transparent electrode and one color filter electrode being combined as a pair and the pairs being repeatedly arranged.
Claim 10
Dependent Claim
40 words
An electrophotographic photosensitive member which comprises isolated conductive members forming picture elements, a photoconductive layer, non-transparent electrodes and color filter electrodes, one non-transparent electrode and one color filter electrode being combined as a pair and the pairs being repeatedly arranged.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |