Patent US5140445A successfully refreshed from Google Patents.
US5140445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Imaging reading apparatus having a preheating system
Assignee: Fujifilm Business Innovation Corp
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Filing: 1990-06-06
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Granted: 1992-08-18
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Expires: 2010-06-06
Abstract
Abstract An image sensor is operable in a read state, a rest state, and a stand-by state. Control signal generating means generate a control signal. The control signal has a first constant preset level during the read state, a second preset level during the rest state, and alternates between the first and second levels at a duty ratio during the stand-by state. Drive circuit means transfer current to the image sensor in response to the control signal. Therefore, current is continuously transferred to the image sensor during the read state, no current is transferred during the rest state, and current is intermittently transferred to the image sensor at the duty ratio during the stand-by state.
Inventors
- 👤 Izumi Takashima
- 👤 Shinichiro Taga
- 👤 Mitsuo Ohtaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:45
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/00885; H04N1/00888; H04N1/00891; H04N1/00896; H04N1/00912
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
112 words
An image reading apparatus operable in a read state and a stand-by state, comprising: an image sensor; drive circuit means for transferring current to said image sensor in response to a control signal; means for generating said control signal, said control signal having a constant preset level during the read state and said control signal having alternate first and second levels alternating at a duty ratio during the stand-by state; wherein current is continuously transferred to said image sensor during the read state and current is intermittently transferred to said image sensor at said duty ratio during the stand-by state, and wherein said duty ratio is altered in accordance with room temperature.
Claim 2
Dependent Claim
112 words
An image reading apparatus operable in a read state and a stand-by state, comprising: an image sensor; drive circuit means for transferring current to said image sensor in response to a control signal; means for generating said control signal, said control signal having a constant preset level during the read state and said control signal having alternate first and second levels alternating at a duty ratio during the stand-by state; wherein current is continuously transferred to said image sensor during the read state and current is intermittently transferred to said image sensor at said duty ratio during the stand-by state, and wherein said duty ratio is altered in accordance with room temperature.
Claim 3
Dependent Claim
17 words
An image reading apparatus as claimed in claim 1, wherein said image sensor is a charge-coupled device.
Claim 4
Dependent Claim
18 words
An image reading apparatus as claimed in claim 2, wherein said duty ratio is at least 30 percent.
Claim 5
Dependent Claim
19 words
An image reading apparatus as claimed in claim 1 wherein said duty ratio decreases as the room temperature increases.
Claim 6
Dependent Claim
131 words
An image reading apparatus operable in a read state, a rest state, and a stand-by state, comprising: an image sensor; drive circuit means for transferring current to said image sensor in response to a control signal; means for generating said control signal, said control signal having a constant preset first level during the read state, said control signal having a constant preset second level during the rest state, and said control signal alternating between said first level and said second level at a duty ratio during the stand-by state; wherein current is continuously transferred to said image sensor during the read state, no current is transferred to said image sensor during the rest state, and current is intermittently transferred to said image sensor at said duty rate during the stand-by state.
Claim 7
Dependent Claim
131 words
An image reading apparatus operable in a read state, a rest state, and a stand-by state, comprising: an image sensor; drive circuit means for transferring current to said image sensor in response to a control signal; means for generating said control signal, said control signal having a constant preset first level during the read state, said control signal having a constant preset second level during the rest state, and said control signal alternating between said first level and said second level at a duty ratio during the stand-by state; wherein current is continuously transferred to said image sensor during the read state, no current is transferred to said image sensor during the rest state, and current is intermittently transferred to said image sensor at said duty rate during the stand-by state.
Claim 8
Dependent Claim
17 words
An image reading apparatus as claimed in claim 5, wherein said image sensor is a charge-coupled device.
Claim 9
Dependent Claim
18 words
An image reading apparatus as claimed in claim 6, wherein said duty ratio is at least 30 percent.
Claim 10
Dependent Claim
20 words
An image reading apparatus as claimed in claim 7, wherein said duty ratio is altered in accordance with room temperature.
Claim 11
Dependent Claim
19 words
An image reading apparatus as claimed in claim 8 wherein said duty ratio decreases as the room temperature increases.
Claim 12
Dependent Claim
20 words
An image reading apparatus as claimed in claim 5 or 9 wherein the duration of the rest state is preset.
Claim 13
Dependent Claim
30 words
An image reading apparatus as claimed in claim 5 or 9 wherein the duration of said the rest state is altered in accordance with the duration of the read state.
Claim 14
Dependent Claim
27 words
An image reading apparatus as claimed in claim 11 wherein the duration of the rest state is increased as the duration of the read state is increased.
Claim 15
Dependent Claim
28 words
An image reading apparatus as claimed in claim 5 or 11 wherein the duration of the rest state is altered in accordance a number of images previously read.
Claim 16
Dependent Claim
27 words
An image reading apparatus as claimed in claim 13 wherein the duration of the rest state is increased as the number of images previously read is increased.
Claim 17
Dependent Claim
122 words
An image reading apparatus operable in a read state and a stand-by state, comprising: an image sensor; a heater formed in proximity to said image sensor for heating said image sensor, said heater generating heat when said heater receives a current; drive circuit means for transferring current to said heater in response to a control signal; means for generating a control signal, said control signal having said constant preset level during the read state and said control signal having alternate first and second levels alternating at a duty ratio during the stand-by state; wherein current is continuously transferred to said heater during the read state and current is intermittently transferred to said image sensor at said duty ratio during the stand-by state.
Claim 18
Dependent Claim
122 words
An image reading apparatus operable in a read state and a stand-by state, comprising: an image sensor; a heater formed in proximity to said image sensor for heating said image sensor, said heater generating heat when said heater receives a current; drive circuit means for transferring current to said heater in response to a control signal; means for generating a control signal, said control signal having said constant preset level during the read state and said control signal having alternate first and second levels alternating at a duty ratio during the stand-by state; wherein current is continuously transferred to said heater during the read state and current is intermittently transferred to said image sensor at said duty ratio during the stand-by state.
Claim 19
Dependent Claim
17 words
An image reading apparatus as claimed in claim 15, wherein said image sensor is a charge-coupled device.
Claim 20
Dependent Claim
18 words
An image reading apparatus as claimed in claim 16, wherein said duty ratio is at least 30 percent.
Claim 21
Dependent Claim
20 words
An image reading apparatus as claimed in claim 17, wherein said duty ratio is altered in accordance with room temperature.
Claim 22
Dependent Claim
19 words
An image reading apparatus as claimed in claim 18 wherein said duty ratio decreases as the room temperature increases.
Claim 23
Dependent Claim
151 words
An image reading apparatus operable in a read state, a rest state, and a stand-by state, comprising: an image sensor; a heater formed in proximity to said image sensor for heating said image sensor, said heater generating heat when said heater receives a current; drive circuit means for transferring current to said heater in response to a control signal; means for generating said control signal, said control signal having a constant preset first level during the read state, said control signal having a constant preset second level during the rest state, and said control signal alternating between said first level and said second level at a duty ratio during the stand-by state; wherein current is continuously transferred to said heater during the read state, no current is transferred to said heater during the rest state, and current is intermittently transferred to said heater at said duty rate during the stand-by state.
Claim 24
Dependent Claim
151 words
An image reading apparatus operable in a read state, a rest state, and a stand-by state, comprising: an image sensor; a heater formed in proximity to said image sensor for heating said image sensor, said heater generating heat when said heater receives a current; drive circuit means for transferring current to said heater in response to a control signal; means for generating said control signal, said control signal having a constant preset first level during the read state, said control signal having a constant preset second level during the rest state, and said control signal alternating between said first level and said second level at a duty ratio during the stand-by state; wherein current is continuously transferred to said heater during the read state, no current is transferred to said heater during the rest state, and current is intermittently transferred to said heater at said duty rate during the stand-by state.
Claim 25
Dependent Claim
17 words
An image reading apparatus as claimed in claim 20, wherein said image sensor is a charge-coupled device.
Claim 26
Dependent Claim
18 words
An image reading apparatus as claimed in claim 21, wherein said duty ratio is at least 30 percent.
Claim 27
Dependent Claim
20 words
An image reading apparatus as claimed in claim 22, wherein said duty ratio is altered in accordance with room temperature.
Claim 28
Dependent Claim
19 words
An image reading apparatus as claimed in claim 23 wherein said duty ratio decreases as the room temperature increases.
Claim 29
Dependent Claim
20 words
An image reading apparatus as claimed in claim 20 or 24 wherein the duration of the rest state is preset.
Claim 30
Dependent Claim
29 words
An image reading apparatus as claimed in claim 20 or 24 wherein the duration of the rest state is altered in accordance with the duration of the read state.
Claim 31
Dependent Claim
28 words
An image reading apparatus as claimed in claim 26 wherein the duration of said the rest state is increased as the duration of the read state is increased.
Claim 32
Dependent Claim
28 words
An image reading apparatus as claimed in claim 20 or 24 wherein the duration of the rest state is altered in accordance a number of images previously read.
Claim 33
Dependent Claim
27 words
An image reading apparatus as claimed in claim 28 wherein the duration of the rest state is increased as the number of images previously read is increased.
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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) | 1995-08-18 | 1996-02-17 | 1996-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-18 | 2000-02-17 | 2000-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-18 | 2004-02-17 | 2004-08-18 | $7700.00 | Window Closed / Lapsed |