US5585940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Facsimile apparatus with recording density control
Assignee: Ricoh Co Ltd
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Filing: 1995-10-31
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Granted: 1996-12-17
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Expires: 2015-10-31
Abstract
Abstract In a facsimile apparatus, record density data associated with received data is used to control record density on a paper. At the same time, the emission intensity or pixel-by-pixel emission interval of a light emitting device is controlled to change tonality on a paper pixel by pixel in association with the record density. Hence, even when the record density of received data changes, the present invention prevents the density of a reproduced image from changing and prevents discontinuous lines from being undesirably exaggerated.
Inventors
- 👤 Toshio Seto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:37
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/40; H04N1/40025; H04N1/40037; H04N1/407
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
106 words
A facsimile apparatus comprising: receiving means for receiving facsimile data via an external channel; detecting means for detecting a record density of the received facsimile data; a register for storing data of an intensity and a pulse width of an image to be recorded based on the detected record density of the received facsimile data; recording means for recording on a recording medium the image represented by the data received by said receiving means, said recording means having an intensity and a pulse width of an emission level controlled based on the data stored in the register, to thereby control a tonality on said recording medium.
Claim 2
Dependent Claim
106 words
A facsimile apparatus comprising: receiving means for receiving facsimile data via an external channel; detecting means for detecting a record density of the received facsimile data; a register for storing data of an intensity and a pulse width of an image to be recorded based on the detected record density of the received facsimile data; recording means for recording on a recording medium the image represented by the data received by said receiving means, said recording means having an intensity and a pulse width of an emission level controlled based on the data stored in the register, to thereby control a tonality on said recording medium.
Claim 3
Dependent Claim
70 words
An apparatus as claimed in claim 1, wherein said recording means comprises: a light emitting device for emitting light on the basis of the data received by said receiving means; and a photoconductive element having a surface thereof scanned by the light issuing from said light emitting device; said recording means further controlling at least one of an emission intensity and a pixel-by-pixel emission interval of said light emitting device.
Claim 4
Dependent Claim
59 words
An apparatus as claimed in claim 1, said recording means further comprises a rotatable polygon motor for steering the light issuing from said light emitting device toward said photoconductive element, said recording means changing a rotation speed of said polygon motor and a frequency of a pixel synchronization signal to thereby control the recording density on the recording medium.
Claim 5
Dependent Claim
126 words
A facsimile apparatus comprising: receiving means for receiving facsimile data via an external channel; detecting means for detecting a record density of the received facsimile data; determining means for determining data of an intensity and a pulse width of an image to be recorded based on the detected record density of the received facsimile data; a register for storing said determined data of the intensity and pulse width of the image to be recorded; recording means for recording on a recording medium the image represented by the data received by said receiving means, said recording means having an intensity and a pulse width of an emission level controlled based on said determined data stored in the register, to thereby control a tonality on said recording medium.
Claim 6
Dependent Claim
126 words
A facsimile apparatus comprising: receiving means for receiving facsimile data via an external channel; detecting means for detecting a record density of the received facsimile data; determining means for determining data of an intensity and a pulse width of an image to be recorded based on the detected record density of the received facsimile data; a register for storing said determined data of the intensity and pulse width of the image to be recorded; recording means for recording on a recording medium the image represented by the data received by said receiving means, said recording means having an intensity and a pulse width of an emission level controlled based on said determined data stored in the register, to thereby control a tonality on said recording medium.
Claim 7
Dependent Claim
69 words
An apparatus as claimed in claim 4, wherein said recording means comprises: a light emitting device for emitting light based on the facsimile data received by said receiving means; and a photoconductive element having a surface thereof scanned by the light issuing from said light emitting device; said recording means further controlling at least one of an emission intensity and a pixel-by-pixel emission interval of said light emitting device.
Claim 8
Dependent Claim
60 words
An apparatus as claimed in claim 4, wherein said recording means further comprises a rotatable polygon motor for steering the light issuing from said light emitting device toward said photoconductive element, said recording means changing a rotation speed of said polygon motor and a frequency of a pixel synchronization signal to thereby control the recording density on the recording medium.
Claim 9
Dependent Claim
205 words
A facsimile apparatus comprising: receiving means for receiving facsimile data via an external channel; detecting means for detecting a record density of the received facsimile data; a register for storing data of an intensity and a pulse width of an image to be recorded based on the detected record density of the received facsimile data; recording means for recording on a recording medium the image represented by the data received by said receiving means, said recording means having an intensity and a pulse width of an emission level controlled based on the data stored in said register to thereby control a tonality on said recording medium; a variable oscillator for generating, in accordance with a set magnification change ratio, a first clock for pixel synchronization and a second clock for driving a polygon motor; a motor drive circuit for feeding a drive current to the polygon motor in response to said second clock; and an LD modulating circuit for controlling a record density on said recording medium based on the record density of the received facsimile data, and for outputting, in response to said first clock and image data, a modulated drive signal for causing an LD to emit with a variable intensity or intermittently.
Claim 10
Dependent Claim
205 words
A facsimile apparatus comprising: receiving means for receiving facsimile data via an external channel; detecting means for detecting a record density of the received facsimile data; a register for storing data of an intensity and a pulse width of an image to be recorded based on the detected record density of the received facsimile data; recording means for recording on a recording medium the image represented by the data received by said receiving means, said recording means having an intensity and a pulse width of an emission level controlled based on the data stored in said register to thereby control a tonality on said recording medium; a variable oscillator for generating, in accordance with a set magnification change ratio, a first clock for pixel synchronization and a second clock for driving a polygon motor; a motor drive circuit for feeding a drive current to the polygon motor in response to said second clock; and an LD modulating circuit for controlling a record density on said recording medium based on the record density of the received facsimile data, and for outputting, in response to said first clock and image data, a modulated drive signal for causing an LD to emit with a variable intensity or intermittently.
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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) | 1999-12-17 | 2000-06-17 | 2000-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-17 | 2004-06-17 | 2004-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-17 | 2008-06-17 | 2008-12-17 | $7700.00 | Window Closed / Lapsed |