US5237344A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ink jet recording apparatus and method with dot thinning
Assignee: Canon Inc
•
Filing: 1992-04-15
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Granted: 1993-08-17
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Expires: 2012-04-15
Abstract
Abstract This specification discloses an ink jet recording method and apparatus for printing thinning print dots based upon a printing mode or the printing dot density of the characters.
Inventors
- 👤 Shigemitsu Tasaki
- 👤 Mikio Shiga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:29
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/485; B41J2/505; B41J2/5056; B41J2/5058; B41J2/005; B41J2/01; B41J2/17; B41J2/195
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
130 words
An ink jet recording apparatus comprising: a recording head having plural discharge openings for discharging ink onto a recording medium in accordance with data supplied to said recording head, said plural discharge openings being arranged in a direction different from a direction in which said recording head and the recording medium are relatively scanned; recognizing means for recognizing a recording dot density of recording data to be recorded on the recording medium; thinning means for calculating thinned data based on the recording dot density of the recording data corresponding to said plural discharge openings; and supply means for supplying the thinned data to said recording head during the relative scanning of said recording head and the recording medium to improve fixing properties of the ink discharged onto the recording medium.
Claim 2
Dependent Claim
130 words
An ink jet recording apparatus comprising: a recording head having plural discharge openings for discharging ink onto a recording medium in accordance with data supplied to said recording head, said plural discharge openings being arranged in a direction different from a direction in which said recording head and the recording medium are relatively scanned; recognizing means for recognizing a recording dot density of recording data to be recorded on the recording medium; thinning means for calculating thinned data based on the recording dot density of the recording data corresponding to said plural discharge openings; and supply means for supplying the thinned data to said recording head during the relative scanning of said recording head and the recording medium to improve fixing properties of the ink discharged onto the recording medium.
Claim 3
Dependent Claim
29 words
An ink jet recording apparatus according to claim 1, wherein the thinned data is produced in response to a type of recording data that represents high recording dot density.
Claim 4
Dependent Claim
28 words
An ink jet recording apparatus according to claim 1, wherein the thinned data is produced in response to a type of recording data that represents a bit image.
Claim 5
Dependent Claim
28 words
An ink jet recording apparatus according to claim 1, wherein the thinned data is produced in response to a type of recording data that is a reverse image.
Claim 6
Dependent Claim
28 words
An ink jet recording apparatus according to claim 1, wherein said thinning means calculates thinned data by performing an AND calculation of the recording data and thinning data.
Claim 7
Dependent Claim
21 words
An ink jet recording apparatus according to claim 1, wherein the thinned data is calculated in response to the relative scanning.
Claim 8
Dependent Claim
24 words
An ink jet recording apparatus according to claim 6, wherein the thinning data is subjected to a bit-shift in response to the relative scanning.
Claim 9
Dependent Claim
24 words
An ink jet recording apparatus according to claim 1, further comprising a mode selection means for selecting a thinning mode for calculating thinned data.
Claim 10
Dependent Claim
25 words
An ink jet recording apparatus according to claim 8, wherein said thinning means calculates thinned data when said mode selection means selects the thinning mode.
Claim 11
Dependent Claim
24 words
An ink jet recording apparatus according to claim 1, further comprising thinning rate selection means for selecting a thinning rate for calculating thinned data.
Claim 12
Dependent Claim
28 words
An ink jet recording apparatus according to claim 10, wherein the thinning data is determined in response to the thinning rate selected by said thinning rate selection means.
Claim 13
Dependent Claim
22 words
An ink jet recording apparatus according to claim 1, wherein said thinning means has a print buffer for storing the thinned data.
Claim 14
Dependent Claim
24 words
An ink jet recording apparatus according to claim 1, wherein said recording means includes thermal energy discharge means for discharging ink to effect recording.
Claim 15
Dependent Claim
111 words
An ink jet recording method comprising the steps of: providing a recording head having plural discharge openings for discharging ink onto a recording medium in accordance with data supplied to said recording head; recognizing a recording dot density of recording data to be recorded on the recording medium; calculating thinned data based on the recording dot density of the recording data corresponding to said plural discharge openings; supplying the thinned data to said recording head for recording; causing said recording head to relatively scan in a direction different from a direction in which said plural discharge openings are arranged; and repeating said recognizing step, calculating step, supplying step and scanning step.
Claim 16
Dependent Claim
111 words
An ink jet recording method comprising the steps of: providing a recording head having plural discharge openings for discharging ink onto a recording medium in accordance with data supplied to said recording head; recognizing a recording dot density of recording data to be recorded on the recording medium; calculating thinned data based on the recording dot density of the recording data corresponding to said plural discharge openings; supplying the thinned data to said recording head for recording; causing said recording head to relatively scan in a direction different from a direction in which said plural discharge openings are arranged; and repeating said recognizing step, calculating step, supplying step and scanning step.
Claim 17
Dependent Claim
22 words
An ink jet recording method according to claim 14, wherein said recognizing step recognizes whether the recording data is a bit image.
Claim 18
Dependent Claim
22 words
An ink jet recording method according to claim 14, wherein said recognizing step recognizes whether the recording data is a reverse image.
Claim 19
Dependent Claim
28 words
An ink jet recording method according to claim 14, wherein said calculating step calculates thinned data by performing an AND calculation of the recording data and thinning data.
Claim 20
Dependent Claim
22 words
An ink jet recording method according to claim 14, wherein the thinning data is subjected to bit-shifting in every said repeating step.
Claim 21
Dependent Claim
24 words
An ink jet recording method according to claim 14, further comprising a selection step for selecting a thinning rate calculated in said calculating step.
Claim 22
Dependent Claim
26 words
An ink jet recording method according to claim 19, wherein a thinning rate is determined in response to the thinning rate selection in said selected step.
Claim 23
Dependent Claim
23 words
An ink jet recording method according to claim 14, wherein said supplying step includes discharging ink to effect recording by using thermal energy.
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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) | 1996-08-16 | 1997-02-15 | 1997-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-16 | 2001-02-15 | 2001-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-16 | 2005-02-15 | 2005-08-17 | $7700.00 | Window Closed / Lapsed |