US4996606A
Expired / Lapsed
US
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Light emitting device and original reading apparatus having the device
Assignee: Canon Inc
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Filing: 1988-11-14
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Granted: 1991-02-26
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Expires: 2008-11-14
Abstract
Abstract An image reading apparatus comprises a light emitting device for illuminating an original including information to be read; image sensor for inputting an optical information and converting it into an electric signal; and wherein the light emitting device has a xeron glow lamp and a light source which can illuminate a vicinity of a main electrode of the glow lamp.
Inventors
- 👤 Tatsundo Kawai
- 👤 Makoto Ogura
- 👤 Koji Tomoda
- 👤 Hiroo Ichihashi
- 👤 Shinichi Seitoh
- 👤 Yasuo Kuroda
- 👤 Hiroyuki Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:36
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/024; H04N1/028; H04N1/02815; H04N1/02845; H04N1/0287; H01; H01J; H01J61/00; H01J61/02; H01J61/54; H04N1/40; H04N1/40056; H05; H05B; H05B41/00; H05B41/14; H05B41/36; H05B41/38; H05B41/39; H05B41/392; H04N1/04; H04N1/12
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
85 words
An image reading apparatus comprising: a light emitting device for illuminating an original, said light emitting device having a xenon glow lamp and a light source for illuminating a vicinity of a main electrode of the glow lamp; an image sensor for converting optical information from the original into an electric signal; a controller for controlling an operation of reading an image of the original; and a driven for driving the xenon glow lamp and the light source, said driver being operated by said controller.
Claim 2
Dependent Claim
85 words
An image reading apparatus comprising: a light emitting device for illuminating an original, said light emitting device having a xenon glow lamp and a light source for illuminating a vicinity of a main electrode of the glow lamp; an image sensor for converting optical information from the original into an electric signal; a controller for controlling an operation of reading an image of the original; and a driven for driving the xenon glow lamp and the light source, said driver being operated by said controller.
Claim 3
Dependent Claim
17 words
An apparatus of claim 1, wherein said light source comprises fixed within a holder holding said lamp.
Claim 4
Dependent Claim
13 words
An apparatus of claim 1, wherein said light source is an incandescent lamp.
Claim 5
Dependent Claim
14 words
An apparatus of claim 1, wherein said light source comprises a light emitting diode.
Claim 6
Dependent Claim
21 words
An apparatus of claim 1, wherein said light source emits an electromagnetic wave having a wave length less than 605 nm.
Claim 7
Dependent Claim
38 words
An apparatus of claim 1, wherein said driver includes a circuit for controlling said xenon lamp and said light source so that a lighting timing of said light source is before a lighting timing of said xenon lamp.
Claim 8
Dependent Claim
33 words
An apparatus of claim 1, wherein said driver includes a circuit for applying a voltage to an electrode of said xenon glow lamp, and simultaneously applying gradually increasing voltage to said light source.
Claim 9
Dependent Claim
38 words
An apparatus of claim 1, wherein said driver includes a circuit for lighting said light source at a first brightness for a desired time period, and for lighting it at a second brightness after the desired time period.
Claim 10
Dependent Claim
38 words
An apparatus of claim 1, wherein said driver includes a circuit for simultaneously applying a voltage to said xenon glow lamp and to said light source, and for putting out said light source before said xenon glow lamp.
Claim 11
Dependent Claim
44 words
An apparatus of claim 1, wherein said driver includes a semiconductor switch provided at a primary circuit in a starting circuit of said xenon glow lamp, for turning on and off said light source according to an on and off operation of said switch.
Claim 12
Dependent Claim
19 words
An apparatus of claim 1, wherein said xenon glow lamp has a auxiliary electrode provided between the main electrodes.
Claim 13
Dependent Claim
14 words
An apparatus of claim 1, wherein a plurality of said light sources are provided.
Claim 14
Dependent Claim
22 words
An apparatus of claim 1, wherein at least a portion of lead wiring relating to said light emitting device is electromagnetically shielded.
Claim 15
Dependent Claim
32 words
An apparatus of claim 1, wherein said light source is arranged so that a main light flux of the light source is incident on the main electrode of said xenon glow lamp.
Claim 16
Dependent Claim
18 words
An apparatus of claim 1, wherein said driver puts out the light source before the xenon glow lamp.
Claim 17
Dependent Claim
19 words
An apparatus of claim 1, wherein said driver includes a circuit for gradually increasing voltage to the light source.
Claim 18
Dependent Claim
16 words
An apparatus of claim 1, further comprising means for transporting said original into a reading position.
Claim 19
Dependent Claim
21 words
An apparatus of claim 17, further comprising means for transmitting an electric signal corresponding to the image information of the original.
Claim 20
Dependent Claim
22 words
An apparatus of claim 1, further comprising means for transporting said original into a reading portion, and means for recording the image.
Claim 21
Dependent Claim
20 words
An apparatus of claim 19, further comprising means for transmitting an electric signal corresponding to image information of the original.
Claim 22
Dependent Claim
45 words
A light emitting device comprising: a xenon glow lamp; and a light source arranged so as to illuminate a vicinity of a main electrode of said xenon glow lamp so that a main light flux of said light source is incident on the main electrode.
Claim 23
Dependent Claim
45 words
A light emitting device comprising: a xenon glow lamp; and a light source arranged so as to illuminate a vicinity of a main electrode of said xenon glow lamp so that a main light flux of said light source is incident on the main electrode.
Claim 24
Dependent Claim
22 words
A device of claim 21, wherein said light source has a light timing before a light timing of said xenon glow lamp.
Claim 25
Dependent Claim
46 words
A device of claim 21, further comprising a semiconductor switch, provided at a primary circuit in an inverter starting circuit of said xenon glow lamp, for turning on and off said xenon glow lamp and said light source by on and off operation of said switch.
Claim 26
Dependent Claim
33 words
A device of claim 21, wherein said switch, simultaneously with applying a voltage to an electrode of said xenon glow lamp for lighting, applies a gradually increasing voltage to said auxiliary light source.
Claim 27
Dependent Claim
18 words
A device of claim 21, wherein said switch turns off said light source before said zenon glow lamp.
Claim 28
Dependent Claim
21 words
A device of claim 21, wherein said light source has at least two lighting states providing first and second brightnesses respectively.
Claim 29
Dependent Claim
19 words
A device of claim 21, wherein said light source is fixed within a border holding said xenon glow lamp.
Claim 30
Dependent Claim
13 words
A device of claim 27, wherein said light source comprises an incandescent lamp.
Claim 31
Dependent Claim
14 words
A device of claim 27, wherein said light source comprises a light emitting diode.
Claim 32
Independent Claim
56 words
A method for driving a light emitting device provided with a xenon glow lamp and a light source capable of illuminating at least a vicinity of a main electrode of the xenon glow lamp, comprising the step of simultaneously applying a voltage between electrodes of the xenon glow lamp, and a voltage to the light source.
Claim 33
Independent Claim
56 words
A method for driving a light emitting device provided with a xenon glow lamp and a light source capable of illuminating at least a vicinity of a main electrode of the xenon glow lamp, comprising the step of simultaneously applying a voltage between electrodes of the xenon glow lamp, and a voltage to the light source.
Claim 34
Dependent Claim
22 words
A method of claim 30, wherein the voltage applied to the light source is gradually increased during a time of its application.
Claim 35
Dependent Claim
32 words
A method of claim 30, wherein the voltage to be applied to the light source has, upon its applications, a level lower than a level just before an end of its application.
Claim 36
Dependent Claim
29 words
A method of claim 30, wherein an end of the voltage application to the light source is before an end of the voltage application to the xenon glow lamp.
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) | 1994-02-25 | 1994-08-27 | 1995-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-25 | 1998-08-27 | 1999-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-25 | 2002-08-27 | 2003-02-26 | $7700.00 | Window Closed / Lapsed |