US4463284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for controlling luminous intensity of fluorescent lamp of reproducing apparatus
Assignee: Konica Minolta Inc
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Filing: 1982-07-21
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Granted: 1984-07-31
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Expires: 2002-07-21
Abstract
Abstract A method of controlling the luminous intensity of a fluorescent lamp of the reproducing apparatus characterized in that a first stage for detecting the amount of light from the fluorescent lamp is linked with a second stage for controlling the lamp current of the fluorescent lamp by use of an output corresponding to the detection output of the first stage as the input. A luminous intensity controlling apparatus for fluorescent lamp of the reproducing apparatus characterized in that the fluorescent lamp is a cold cathode type fluorescent lamp, and luminosity detection device for detecting the amount of light from the cold cathode type fluorescent lamp and lamp current control device for controlling the lamp current of the cold cathode type fluorescent lamp using an output corresponding to the detection output of the luminosity detection device as the input are linked with each other.
Inventors
- 👤 Akihiko Tamura
- 👤 Katsuhiro Shukuri
- 👤 Kiyoaki Kawamoto
- 👤 Haruo Iwahashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:48
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/04; G03G15/04036; G03G15/043
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
130 words
In a reproducing apparatus, in combination: a photoconductive photosensitive member; a cold cathode type fluorescent lamp for illuminating said member to produce an effect thereon; and a luminous intensity controlling apparatus for maintaining the luminous intensity of said lamp at some predetermined level comprising: detecting means for detecting the luminous intensity of said lamp and for providing an electric output signal related thereto; reference means for receiving said output signal and for comparing it to a reference signal representative of some predetermined luminous intensity and for providing a reference output signal based on the comparison; and lamp current control means for receiving said reference output signal and for controlling the lamp current of said lamp in accordance therewith to maintain the luminous intensity of said lamp at said predetermined level.
Claim 2
Dependent Claim
130 words
In a reproducing apparatus, in combination: a photoconductive photosensitive member; a cold cathode type fluorescent lamp for illuminating said member to produce an effect thereon; and a luminous intensity controlling apparatus for maintaining the luminous intensity of said lamp at some predetermined level comprising: detecting means for detecting the luminous intensity of said lamp and for providing an electric output signal related thereto; reference means for receiving said output signal and for comparing it to a reference signal representative of some predetermined luminous intensity and for providing a reference output signal based on the comparison; and lamp current control means for receiving said reference output signal and for controlling the lamp current of said lamp in accordance therewith to maintain the luminous intensity of said lamp at said predetermined level.
Claim 3
Dependent Claim
22 words
Reproducing apparatus according to claim 1 wherein said detecting means comprises light receiving means for detecting the luminous intensity of said lamp.
Claim 4
Dependent Claim
33 words
Reproducing apparatus according to claim 1 wherein said detecting means comprises temperature responsive means for detecting the ambient temperature to which said lamp is exposed to ascertain the luminous intensity of said lamp.
Claim 5
Dependent Claim
32 words
Reproducing apparatus according to claim 1 or 2 or 3 wherein reference means is adjustable so as to vary said reference signal and thereby change the level of said predetermined luminous intensity.
Claim 6
Dependent Claim
28 words
Reproducing apparatus according to claim 1 or 2 or 3 wherein said effect produced by said lamp is to expose an original being processed in said reproducing apparatus.
Claim 7
Dependent Claim
24 words
Reproducing apparatus according to claim 4 wherein said effect produced by said lamp is to expose an original being processed in said reproducing apparatus.
Claim 8
Dependent Claim
31 words
Reproducing apparatus according to claim 1 or 2 or 3 wherein said effect produced by said lamp is to eliminate an electrostatic charge on the surface of said photoconductive photosensitive member.
Claim 9
Dependent Claim
27 words
Reproducing apparatus according to claim 4 wherein said effect produced by said lamp is to eliminate an electrostatic charge on the surface of said photoconductive photosensitive member.
Claim 10
Independent Claim
117 words
A method of operating a reproducing apparatus comprising a photoconductive photosensitive member; a cold cathode type fluorescent lamp for illuminating said member to produce an effect thereon; and a luminous intensity controlling apparatus to maintain the luminous intensity of said lamp at some predetermined level, said method comprising the steps of: detecting the luminous intensity of said lamp and providing an electric output signal related thereto; comparing said output signal to a reference signal representative of some predetermined luminous intensity to obtain a reference output signal based on the comparison; and controlling the lamp current of said lamp in accordance with said reference output signal to maintain the luminous intensity of said lamp at said predetermined level.
Claim 11
Independent Claim
117 words
A method of operating a reproducing apparatus comprising a photoconductive photosensitive member; a cold cathode type fluorescent lamp for illuminating said member to produce an effect thereon; and a luminous intensity controlling apparatus to maintain the luminous intensity of said lamp at some predetermined level, said method comprising the steps of: detecting the luminous intensity of said lamp and providing an electric output signal related thereto; comparing said output signal to a reference signal representative of some predetermined luminous intensity to obtain a reference output signal based on the comparison; and controlling the lamp current of said lamp in accordance with said reference output signal to maintain the luminous intensity of said lamp at said predetermined level.
Claim 12
Dependent Claim
27 words
A method of operating reproducing apparatus according to claim 9 wherein the step of detecting the luminous intensity of said lamp comprises the step of detecting light.
Claim 13
Dependent Claim
37 words
A method of operating reproducing apparatus according to claim 9 wherein the step of detecting comprises the step of detecting the ambient temperature to which said lamp is exposed to ascertain the luminous intensity of said lamp.
Claim 14
Dependent Claim
32 words
A method of operating reproducing apparatus according to claim 9 or 10 or 11 including the step of adjusting said reference signal to thereby change the level of said predetermined luminous intensity.
Claim 15
Dependent Claim
32 words
A method of operating reproducing apparatus according to claim 9 or 10 or 11 wherein said effect produced by said lamp is to expose an original being processed in said reproducing apparatus.
Claim 16
Dependent Claim
28 words
A method of operating reproducing apparatus according to claim 12 wherein said effect produced by said lamp is to expose an original being processed in said reproducing apparatus.
Claim 17
Dependent Claim
35 words
A method of operating reproducing apparatus according to claim 9 or 10 or 11 wherein said effect produced by said lamp is to eliminate an electrostatic charge on the surface of said photoconductive photosensitive member.
Claim 18
Dependent Claim
31 words
A method of operating reproducing apparatus according to claim 12 wherein said effect produced by said lamp is to eliminate an electrostatic charge on the surface of said photoconductive photosensitive member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-31 | 1988-01-30 | 1988-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-31 | 1992-01-30 | 1992-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-31 | 1996-01-30 | 1996-07-31 | $7700.00 | Window Closed / Lapsed |