Patent US4734787A successfully refreshed from Google Patents.
US4734787A
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US
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Original reader
Assignee: Canon Inc
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Filing: 1987-03-10
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Granted: 1988-03-29
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Expires: 2007-03-10
Abstract
Abstract There is disclosed an original reader capable of reading original image with a high fidelity. The original reader has a plurality of line sensors each having a plurality of photosensor elements, said line sensors being so arranged that the read lines of adjacent line sensors differ. Said plurality of line sensors and an original are relatively moved in scanning direction and vertical direction of said plurality of line sensors. An analog output of the line sensor which scans the original before others of said plurality of line sensors is delayed by a predetermined time.
Inventors
- 👤 Kimiyoshi Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:14
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/19; H04N1/195; H04N1/19505; H04N1/19515; H04N1/19521; H04N1/19568; H04N1/19584
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
150 words
An original reader comprising: a plurality of line sensor chips provided on a substrate and each having a plurality of photosensor elements, said line sensor chips being arranged such that lines read by adjacent line sensor chips mutually differ, said chips being arranged to read an original image on a division basis and image reading areas of the adjacent line sensor chips being partially overlapped; means for causing relative movement of said plurality of line sensor chips and an original, for reading the original image, in a direction perpendicular to a scanning direction of said plurality of line sensor chips; delay means for delaying an analog output of the line sensor chip which scans the original before others of said plurality of line sensor chips by a predetermined time; and means for eliminating, from outputs of said plurality of line sensor chips, outputs corresponding to said overlapped image reading areas.
Claim 2
Dependent Claim
150 words
An original reader comprising: a plurality of line sensor chips provided on a substrate and each having a plurality of photosensor elements, said line sensor chips being arranged such that lines read by adjacent line sensor chips mutually differ, said chips being arranged to read an original image on a division basis and image reading areas of the adjacent line sensor chips being partially overlapped; means for causing relative movement of said plurality of line sensor chips and an original, for reading the original image, in a direction perpendicular to a scanning direction of said plurality of line sensor chips; delay means for delaying an analog output of the line sensor chip which scans the original before others of said plurality of line sensor chips by a predetermined time; and means for eliminating, from outputs of said plurality of line sensor chips, outputs corresponding to said overlapped image reading areas.
Claim 3
Dependent Claim
29 words
An original reader according to claim 1 wherein said delay means performs delay operation by time corresponding to the difference in the read position of adjacent line sensor chips.
Claim 4
Dependent Claim
30 words
An original reader according to claim 1 wherein said delay means is memory means for storing the analog output of the line sensor chip which scans the original before others.
Claim 5
Dependent Claim
33 words
An original reader according to claim 3 wherein said memory means is a parallel register for parallel shifting the analog output which is extracted parallelly from each photosensor elements of said line sensor.
Claim 6
Dependent Claim
37 words
An original reader according to claim 1 further comprising selection means for selectively outputting the output of said delay means and the output of the line chip which scans the original later on the time division basis.
Claim 7
Dependent Claim
58 words
An original reader according to claim 1 further comprising a moving member operable to move together with said plurality of line sensor chips, said moving member being provided with a light source for exposure of the original and optical means for causing an optical image from the original to be introduced into said plurality of line sensor chips.
Claim 8
Dependent Claim
144 words
An image reading device comprising: a substrate; a plurality of line sensor chips provided on said substrate and each having a plurality of photosensor elements, said line sensor chips being arranged in a zigzag fashion on first and second lines which are spaced with a predetermined interval, and being arranged to read an image on a division basis; a plurality of parallel registers provided on said substrate each for shifting in parallel analog signals outputted in parallel from each of the photosensor elements of the line sensor chips associated with at least one of the first and second lines, in synchronism with an externally provided shift signal; and a plurality of serial registers provided on said substrate each for serially outputting the analog signals outputted in parallel from each of said parallel registers or each of said photosensor elements of said line sensor chips.
Claim 9
Dependent Claim
144 words
An image reading device comprising: a substrate; a plurality of line sensor chips provided on said substrate and each having a plurality of photosensor elements, said line sensor chips being arranged in a zigzag fashion on first and second lines which are spaced with a predetermined interval, and being arranged to read an image on a division basis; a plurality of parallel registers provided on said substrate each for shifting in parallel analog signals outputted in parallel from each of the photosensor elements of the line sensor chips associated with at least one of the first and second lines, in synchronism with an externally provided shift signal; and a plurality of serial registers provided on said substrate each for serially outputting the analog signals outputted in parallel from each of said parallel registers or each of said photosensor elements of said line sensor chips.
Claim 10
Dependent Claim
28 words
An image reading device according to claim 7 further comprising drive means for outputting the analog signals from said plurality of serial registers on a time division basis.
Claim 11
Dependent Claim
23 words
An image reading device according to claim 7 wherein each of said parallel registers performs shift operation synchronized with a line sync signal.
Claim 12
Dependent Claim
25 words
An image reading device according to claim 7 wherein said plurality of line sensors are arranged throughout the width of the original to be read.
Claim 13
Dependent Claim
35 words
An image reading device according to claim 7 wherein each of said parallel registers is operable to delay the analog signals in accordance with the spatial interval between the first line and the second line.
Claim 14
Dependent Claim
28 words
An image reading device according to claim 7 wherein said plurality of serial registers are provided in a corresponding relation with said plurality of line sensor chips, respectively.
Claim 15
Dependent Claim
53 words
An image reading device according to claim 7 wherein each of said plurality of parallel registers is operable to delay the analog signals from each of the photosensor elements of the line sensor chips and to supply in parallel the delayed analog signals to the associated one of said plurality of serial registers.
Claim 16
Dependent Claim
147 words
An original reader comprising: reading means having a plurality of 2n+1 (where n is an integer) line sensors for reading an original image on a division basis, respective image reading areas of adjacent line sensors being partially overlapped, wherein n said line sensors are arranged on a first line which read an original in advance, and n+1 said line sensors are arranged on a second line which read the original following said first line; means for causing relative movement of said plurality of line sensors and an original, for reading the original image, in a direction perpendicular to a scanning direction of said plurality of line sensors; delay means for outputting analog signals from n line sensors of the first line delayed by a predetermined time; and means for eliminating, from outputs of said plurality of line sensors, the outputs corresponding to said overlapped image reading areas.
Claim 17
Dependent Claim
147 words
An original reader comprising: reading means having a plurality of 2n+1 (where n is an integer) line sensors for reading an original image on a division basis, respective image reading areas of adjacent line sensors being partially overlapped, wherein n said line sensors are arranged on a first line which read an original in advance, and n+1 said line sensors are arranged on a second line which read the original following said first line; means for causing relative movement of said plurality of line sensors and an original, for reading the original image, in a direction perpendicular to a scanning direction of said plurality of line sensors; delay means for outputting analog signals from n line sensors of the first line delayed by a predetermined time; and means for eliminating, from outputs of said plurality of line sensors, the outputs corresponding to said overlapped image reading areas.
Claim 18
Dependent Claim
26 words
An original reader according to claim 14 wherein said delay means is memory means for storing analog outputs from n line sensors of the first line.
Claim 19
Dependent Claim
30 words
An original reader according to claim 15 wherein said memory means outputs stored analog output after a time corresponding to the interval between the first line and the second line.
Claim 20
Dependent Claim
33 words
An original reader according to claim 15 wherein said memory means is a parallel register for shifting in parallel the output of each photosensor element of n line sensors of the first line.
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) | 1991-03-29 | 1991-09-28 | 1992-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-29 | 1995-09-28 | 1996-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-29 | 1999-09-28 | 2000-03-29 | $7700.00 | Window Closed / Lapsed |