US4449151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid-state scanning apparatus
Assignee: Ricoh Co Ltd
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Filing: 1982-12-23
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Granted: 1984-05-15
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Expires: 2002-12-23
Abstract
Abstract A solid-state scanning apparatus for scanning the surface of an original to convert light information into electrical signals suitable for application to a facsimile system is provided. The scanning apparatus comprises a stationary original holder, on which an original to be scanned is placed, a stationary optical system including a solid-state line sensor comprised of at least two CCD image sensing devices arranged in a line to carry out the split scanning with a predetermined overlapping scanning section between the two adjacent scanning sections, a pair of first and second storing devices provided for each of said CCD image sensing devices, a control circuit for controlling the operation of the CCD image sensing devices and the storing devices, and a reciprocatingly movable mirror system for leading the light information of the original to the solid-state line sensor.
Inventors
- 👤 Takashi Yokota
- 👤 Shigeru Yamazaki
- 👤 Yoshiaki Kanmoto
- 👤 Motoaki Kawazu
- 👤 Noboru Murayama
- 👤 Daisuke Abe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:49
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/10; H04N1/1013; H04N1/1039; H04N1/1052; H04N1/1056; H04N1/19; H04N1/1903; H04N1/191; H04N1/192; H04N1/193; H04N1/1934
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
259 words
A solid-state scanning apparatus for scanning the surface of an original to convert light information into an electrical image signal comprising: a housing; holding means fixedly mounted to said housing for holding said original stationarily; an optical system fixedly mounted on said housing including a solid-state line sensor and focusing means disposed in alignment with said solid-state line sensor which includes a plurality of image sensing devices arranged such that an overlapping scanning section is defined between the two adjacent scanning segments in a full single scanning line scanned by said plurality of image sensing devices; a plurality of paired first and second storing means, each pair of which is connected to receive image data from the corresponding one of said plurality of image sensing devices; control means for controlling the mode of operation of said first and second storing means such that while one of said first and second storing means is set is a write-in mode, the other is set in a read-out mode, said control means also controlling the operation of said plurality of image sensing devices and said plurality of paired first and second storing means in a predetermined manner in order to prevent the image information of said overlapping sections from appearing twice in a resulting output image signal; a mirror system provided to reciprocate along a predetermined path for leading the light information of said original to said solid-state line sensor of said optical system; and driving means for driving to move said mirror system along said predetermined path in a reciprocating manner.
Claim 2
Dependent Claim
259 words
A solid-state scanning apparatus for scanning the surface of an original to convert light information into an electrical image signal comprising: a housing; holding means fixedly mounted to said housing for holding said original stationarily; an optical system fixedly mounted on said housing including a solid-state line sensor and focusing means disposed in alignment with said solid-state line sensor which includes a plurality of image sensing devices arranged such that an overlapping scanning section is defined between the two adjacent scanning segments in a full single scanning line scanned by said plurality of image sensing devices; a plurality of paired first and second storing means, each pair of which is connected to receive image data from the corresponding one of said plurality of image sensing devices; control means for controlling the mode of operation of said first and second storing means such that while one of said first and second storing means is set is a write-in mode, the other is set in a read-out mode, said control means also controlling the operation of said plurality of image sensing devices and said plurality of paired first and second storing means in a predetermined manner in order to prevent the image information of said overlapping sections from appearing twice in a resulting output image signal; a mirror system provided to reciprocate along a predetermined path for leading the light information of said original to said solid-state line sensor of said optical system; and driving means for driving to move said mirror system along said predetermined path in a reciprocating manner.
Claim 3
Dependent Claim
35 words
Apparatus of claim 1 wherein said each of said image sensing devices is comprised of a Charge Coupled Device (CCD) having a predetermined number of photo-electric converting elements each of which constitutes a picture element.
Claim 4
Dependent Claim
127 words
Apparatus of claim 2 wherein said plurality of CCD image sensing devices include first and second CCD image sensing devices which are arranged in a line and driven to operate staggered in time in response to first and second start pulses applied to said first and second CCD image sensing devices, respectively, from said control means with a time lag corresponding in length to said overlapping scanning section, and one of said first and second storing means of each of said paired first and second storing means is set in the write-in mode in response to said second start pulse whereby the image information read by said CCD image sensing devices is fed into the other of each of said first and second storing means in parallel.
Claim 5
Dependent Claim
47 words
Apparatus of claim 3 wherein while all of said ones of said first and second storing means are in the write-in mode, the data stored in said all of the other of said first and second storing means are read out in sequence from one after another.
Claim 6
Dependent Claim
21 words
Apparatus of claim 4 wherein the frequency of the read-out mode is twice or higher than the frequency of write-in mode.
Claim 7
Dependent Claim
135 words
Apparatus of claim 2 wherein said plurality of CCD image sensing devices include first and second CCD image sensing devices arranged in a line to define a predetermined overlapping scanning section between the two scanning sections covered by said first and second CCD image sensing devices, and said first and second CCD image sensing devices are driven to operate at the same time in response to start pulses applied from said control means to store the sensed image data to the corresponding ones of said paired first and second storing means in parallel, during which the data stored in the others of said paired first and second storing means are read out in sequence from one storing means after another thereby skipping the data of said overlapping scanning section in one of said the others.
Claim 8
Dependent Claim
66 words
Apparatus of claim 6 wherein said control means includes an address counter provided for addressing data to be stored in each pair of said first and second storing means and count skipping means connected to said address counter for skipping the count of said address counter from a first predetermined value to a second predetermined value when said address counter has reached said first predetermined value.
Claim 9
Dependent Claim
22 words
Apparatus of claim 7 wherein the difference between said first and second predetermined values corresponds in length to said overlapping scanning section.
Claim 10
Dependent Claim
22 words
Apparatus of claim 1 further comprising a guide rod which defines said predetermined path and means for carrying thereon said mirror system.
Claim 11
Dependent Claim
65 words
Apparatus of claim 9 wherein said means for carrying includes a first carriage mounted thereon a first mirror and a second carriage mounted thereon a second mirror, said first carriage moving twice as fast as said second carriage thereby the light information of said original is first reflected by said first mirror and then reflected by said second mirror to reach said solid-state line sensor.
Claim 12
Dependent Claim
14 words
Apparatus of claim 10 wherein an illumination means is mounted on said first carriage.
Claim 13
Dependent Claim
17 words
Apparatus of claim 1 further comprising control means for controlling the driving condition of said driving means.
Claim 14
Dependent Claim
41 words
Apparatus of claim 12 wherein said driving means includes a driving motor, and feed-back signals from said motor are fed to said control means to compare with a reference signal thereby insuring to move said mirror system at a constant velocity.
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) | 1987-05-15 | 1987-11-14 | 1988-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-15 | 1991-11-14 | 1992-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-15 | 1995-11-14 | 1996-05-15 | $7700.00 | Window Closed / Lapsed |