US5696542A
Expired / Lapsed
US
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Ink jet recording method
Assignee: Canon Inc
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Filing: 1993-11-10
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Granted: 1997-12-09
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Expires: 2013-11-10
Abstract
Abstract A recording head having a plurality of ink discharge element lines arranged thereon is moved in a direction different from the direction of arrangement of the ink discharge elements to conduct a main scan, and at the end of the main scan, a recording medium is moved by a predetermined width in a direction different from the main scan direction to record an image. A record area of the recording head is divided into a plurality (n) of areas and each unit image area on the recording medium is main scanned n times by using the n divided areas of the recording head and thinned images with a print factor of 1/n are sequentially recorded to complete the record of the unit image area. The print factor for the pixels in the boundary area of adjacent unit image areas is lower than the print factor to the entire unit image area in at least one of the n main scans. Thus, the number of pixels recorded by the same main scan in the boundary area is increased. A high quality image without a joint stripe is attained even for a recording medium having a relatively high ink absorption speed.
Inventors
- 👤 Miyuki Matsubara
- 👤 Hiromitsu Hirabayashi
- 👤 Shigeyasu Nagoshi
- 👤 Noribumi Koitabashi
- 👤 Hitoshi Sugimoto
- 👤 Fumihiro Gotoh
- 👤 Masaya Uetuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:21
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/19; H04N1/191; H04N1/1911; H04N1/1913; H04N1/1915; G; G06; G06K; G06K15/00; G06K15/02; G06K15/10; G06K15/102; G06K15/105; H04N1/12; H04N2201/00; H04N2201/04; H04N2201/0402; H04N2201/0466; H04N2201/0468
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
190 words
an ink jet recording method for recording an image on a recording medium by main scanning a recording head having a plurality of ink discharge elements arranged thereon in a direction other than the direction of arrangement of said ink discharge elements and relatively moving said recording head and said recording medium in a sub-scan direction different from the main scan direction, said method comprising the steps of: dividing a record area of a recording head into a plurality of divided record areas; main scanning an image area on the recording medium a plurality of times by using different divided record areas of the recording head; and sequentially recording thinned images of a predetermined print factor to form to form image area portions in each main scan to complete an image of the image area, with a boundary area being formed at each juncture of adjacent image area portions; wherein a number of pixels recorded in a boundary area of adjacent image area portions of the image area in at least one main scan is less than a number of pixels recorded in the boundary area in another main scan.
Claim 2
Dependent Claim
190 words
an ink jet recording method for recording an image on a recording medium by main scanning a recording head having a plurality of ink discharge elements arranged thereon in a direction other than the direction of arrangement of said ink discharge elements and relatively moving said recording head and said recording medium in a sub-scan direction different from the main scan direction, said method comprising the steps of: dividing a record area of a recording head into a plurality of divided record areas; main scanning an image area on the recording medium a plurality of times by using different divided record areas of the recording head; and sequentially recording thinned images of a predetermined print factor to form to form image area portions in each main scan to complete an image of the image area, with a boundary area being formed at each juncture of adjacent image area portions; wherein a number of pixels recorded in a boundary area of adjacent image area portions of the image area in at least one main scan is less than a number of pixels recorded in the boundary area in another main scan.
Claim 3
Dependent Claim
33 words
An ink jet recording method according to claim 1, wherein a sub-scan of a width of the divided record areas of the recording head is conducted at each end of the main scan.
Claim 4
Dependent Claim
29 words
An ink jet recording method according to claim 1, wherein a color image is recorded on the recording medium by using a plurality of recording heads of different colors.
Claim 5
Dependent Claim
21 words
An ink jet recording method according to claim 3, wherein the plurality of heads are arranged in the main scan direction.
Claim 6
Dependent Claim
32 words
An ink recording method according to claim 1, wherein the recording head discharges an ink droplet from a discharge port by causing a change in an ink state by using thermal energy.
Claim 7
Dependent Claim
33 words
An ink jet recording method according to claim 2, wherein the recording head discharges an ink droplet from a discharge port by causing a change in an ink state by using thermal energy.
Claim 8
Dependent Claim
37 words
An ink jet recording method according to claim 3, wherein each of the plurality of recording heads discharges an ink droplet from a discharge port by causing a change in an ink state by using thermal energy.
Claim 9
Dependent Claim
35 words
An ink jet recording method according to claim 4, wherein each of the plurality of recording heads discharges an ink droplet from a discharge port by causing in an ink state by using thermal energy.
Claim 10
Dependent Claim
48 words
An ink jet recording method according to claim 1, wherein a print factor for pixels in the boundary area of adjacent image area portions of the image area in a first main scan is different from a print factor in the boundary area in a second main scan.
Claim 11
Dependent Claim
41 words
An ink jet recording method according to claim 1, wherein a print factor for pixels in the boundary area of adjacent image area portions of the image area in at least one main scan is different from the predetermined print factor.
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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) | 2000-12-08 | 2001-06-09 | 2001-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-12-08 | 2005-06-09 | 2005-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-12-08 | 2009-06-09 | 2009-12-09 | $7700.00 | Window Closed / Lapsed |