US4507685A
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Image recording device
Assignee: Canon Inc
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Filing: 1982-06-25
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Granted: 1985-03-26
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Expires: 2002-06-25
Abstract
Abstract An image recording apparatus capable of arbitrarily setting a screen angle for recording a screen dot image is disclosed. The apparatus is constructed with an image signal output device; a level signal output device to produce a plurality of output level signals as a group, and to change the sequence of output of said group of signals; a quantized signal generator to generate quantized signals in accordance with the image signals and the level signals; and image recording signal generator to generate image recording signals for image recording by an output from the quantized signal generator.
Inventors
- 👤 Naoto Kawamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:49
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/52; H04N1/40; H04N1/405; H04N1/4055; H04N1/4058
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
130 words
An image recording device, comprising: image signal generating means for generating an image signal representing image data; means for generating a clock signal; binary signal generating means for receiving said image signal and for generating a binary signal from the image data represented thereby, said binary signal generating means generating said binary signal as a binary representation of the image data by sequentially utilizing predetermined parameters each corresponding to a plurality of values; selecting means, having count means, for selectively arranging the predetermined parameters in accordance with a count by said count means, said count means counting the clock signal generated by said clock signal generating means in synchronism with said binary signal; and recording means for recording an image in accordance with image data represented by said binary signal.
Claim 2
Dependent Claim
130 words
An image recording device, comprising: image signal generating means for generating an image signal representing image data; means for generating a clock signal; binary signal generating means for receiving said image signal and for generating a binary signal from the image data represented thereby, said binary signal generating means generating said binary signal as a binary representation of the image data by sequentially utilizing predetermined parameters each corresponding to a plurality of values; selecting means, having count means, for selectively arranging the predetermined parameters in accordance with a count by said count means, said count means counting the clock signal generated by said clock signal generating means in synchronism with said binary signal; and recording means for recording an image in accordance with image data represented by said binary signal.
Claim 3
Dependent Claim
31 words
An image recording device as set forth in claim 1, wherein said binary signal generating means includes memory means for storing the predetermined parameters each corresponding to a plurality of values.
Claim 4
Dependent Claim
33 words
An image recording device as set forth in claim 2, wherein said count means includes an address counter for selecting a reading start position of said plurality of values from said memory means.
Claim 5
Dependent Claim
27 words
An image recording device as set forth in claim 3, wherein said clock signal generating means includes a clock generator for reading out said plurality of values.
Claim 6
Dependent Claim
52 words
An image recording device as set forth in claim 1, wherein said clock signal generating means generates first and second clock signals and wherein said count means counts said first clock signal in synchronism with said binary signal and said second clock signal in correspondence to a line of said binary signal.
Claim 7
Dependent Claim
27 words
An image recording device as set forth in claim 1, wherein said count means includes dividing means for dividing said clock signal synchronized with the binary signal.
Claim 8
Dependent Claim
45 words
An image recording device as set forth in claim 1, wherein said binary signal generating means includes a plurality of memory means for storing an image signal for each of a plurality of colors and switching means for switching between the plurality of memory means.
Claim 9
Dependent Claim
122 words
An image recording device, comprising: image signal output means for producing output image signals in units of an image element; means for generating a clock signal; binary signal generating means for receiving said image signal and generating a binary signal therefrom, said binary signal generating means forming a threshold matrix corresponding to at least one image element unit in order to generate said binary signal; selecting means, having count means, for selectively arranging the thresholds of said threshold matrix in accordance with a count value of said count means, said count means counting the clock signal generated by said clock signal generating means in synchronism with said binary signal; and recording means for recording an image in accordance with said binary signal.
Claim 10
Dependent Claim
122 words
An image recording device, comprising: image signal output means for producing output image signals in units of an image element; means for generating a clock signal; binary signal generating means for receiving said image signal and generating a binary signal therefrom, said binary signal generating means forming a threshold matrix corresponding to at least one image element unit in order to generate said binary signal; selecting means, having count means, for selectively arranging the thresholds of said threshold matrix in accordance with a count value of said count means, said count means counting the clock signal generated by said clock signal generating means in synchronism with said binary signal; and recording means for recording an image in accordance with said binary signal.
Claim 11
Dependent Claim
28 words
An image recording device as set forth in claim 8, wherein said binary signal generating means includes a memory for storing therein threshold data for said threshold matrix.
Claim 12
Dependent Claim
79 words
An image recording device as set forth in claim 9, wherein said count means includes an address counter for changing a read-out start position for reading said threshold matrix out of said memory by M positions in both principal and auxiliary scanning directions, in sequence, with respect to said threshold matrix in the principal direction, and by -M positions in both principal and auxiliary scanning directions, in sequence, with respect to said threshold matrix in the auxiliary scanning direction.
Claim 13
Dependent Claim
52 words
An image recording device as set forth in claim 9, wherein said clock signal generating means generates first and second clock signals and wherein said count means counts said first clock signal in synchronism with said binary signal and said second clock signal in correspondence to a line of said binary signal.
Claim 14
Dependent Claim
45 words
An image recording device as set forth in claim 9, wherein said image signal output means includes a plurality of memory means for storing an image signal for each of a plurality of colors and switching means for switching between the plurality of memory means.
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) | 1988-03-25 | 1988-09-24 | 1989-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-25 | 1992-09-24 | 1993-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-25 | 1996-09-24 | 1997-03-26 | $7700.00 | Window Closed / Lapsed |