US4533928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color image processing apparatus
Assignee: Canon Inc
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Filing: 1983-04-20
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Granted: 1985-08-06
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Expires: 2003-04-20
Abstract
Abstract A color image processing apparatus, such as a color ink jet printer capable of avoiding aberration in the images formed in the forward and reverse motions of the recording carriage, by effecting different image processings in the forward and in the reverse motions.
Inventors
- 👤 Susumu Sugiura
- 👤 Yasuo Kohzato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:13
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/60; H04N1/50; H04N1/506; H04N1/6016; H04N1/6019; H04N1/64; H04N1/648
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
125 words
Color image forming apparatus for forming a color image on a recording member, comprising: dot forming means for forming colored dots in at least three colors during reciprocating relative movement of said dot forming means and the recording member in more than one direction; color signal processing means for converting input signals representing at least three colors into recording signals for forming the dots; timing control means for changing the recording sequence of said dot forming means depending on the direction of the relative movement of said dot forming means and the recording member; and control means for causing said color signal processing means to provide different processing depending on the direction of the relative movement of said dot forming means and the recording member.
Claim 2
Dependent Claim
125 words
Color image forming apparatus for forming a color image on a recording member, comprising: dot forming means for forming colored dots in at least three colors during reciprocating relative movement of said dot forming means and the recording member in more than one direction; color signal processing means for converting input signals representing at least three colors into recording signals for forming the dots; timing control means for changing the recording sequence of said dot forming means depending on the direction of the relative movement of said dot forming means and the recording member; and control means for causing said color signal processing means to provide different processing depending on the direction of the relative movement of said dot forming means and the recording member.
Claim 3
Dependent Claim
55 words
Color image forming apparatus according to claim 1, wherein said color signal processing means is adapted to correct aberrations in the color of the color image caused by the change in the recording sequence of said dot forming means in the different directions of relative movement of said dot forming means and the recording member.
Claim 4
Dependent Claim
21 words
Color image forming apparatus according to claim 2, wherein said color signal processing means is adapted to mask the input signals.
Claim 5
Dependent Claim
38 words
Color image forming apparatus according to claim 3, wherein said color signal processing means effects said masking by adopting different masking coefficients for the different directions of relative movement of said dot forming means and the recording member.
Claim 6
Dependent Claim
37 words
Color image forming apparatus according to claim 3, wherein said color signal processing means includes a memory for storing data for masking and access to said memory is provided by using the input signals as address signals.
Claim 7
Dependent Claim
60 words
Color image forming apparatus according to claim 5, wherein said color signal processing means includes a first memory device for storing data for one direction of relative movement of said dot forming means and the recording member and a second memory device for storing data for another direction of relative movement of said dot forming means and the recording member.
Claim 8
Dependent Claim
52 words
Color image forming apparatus according to claim 5, wherein data supplied to said memory in one direction of relative movement of said dot forming means and the recording member are different from data supplied to said memory in another direction of relative movement of said dot forming means and the recording member.
Claim 9
Dependent Claim
15 words
Color image forming apparatus according to claim 5, wherein said memory includes random access memories.
Claim 10
Dependent Claim
19 words
Color image forming apparatus according to claim 1, wherein said dot forming means forms cyan, magenta and yellow dots.
Claim 11
Dependent Claim
44 words
Color image forming apparatus according to claim 1, wherein said dot forming means includes dot forming members associated with respective colors and said dot forming members are disposed along a direction of reciprocating relative movement of said dot forming means and the recording member.
Claim 12
Dependent Claim
20 words
Color image forming apparatus according to claim 1, wherein said dot forming means forms cyan, magenta, yellow and black dots.
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) | 1988-08-05 | 1989-02-04 | 1989-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-05 | 1993-02-04 | 1993-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-05 | 1997-02-04 | 1997-08-06 | $7700.00 | Window Closed / Lapsed |