Patent US2928448A successfully refreshed from Google Patents.
US7229166B2
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Image-forming method, image-forming apparatus, ink set, and ink
Assignee: Canon Inc
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Filing: 2004-08-10
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Granted: 2007-06-12
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Expires: 2024-08-10
Abstract
Abstract Disclosed herein is an image-forming method, including performing image formation on the basis of pixel data by using at least a yellow recording agent, a magenta recording agent, and a third recording agent. A color represented on a recording medium by the third recording agent on a color space of CIE-L*a*b* has lightness higher than lightness of a color reproduction region represented on the recording medium by a combination of the yellow recording agent and the magenta recording agent, and has a hue angle in the color reproduction region. A difference in hue angle on the color space between a color represented by the yellow recording agent and a color represented by the magenta recording agent is in a range of 60 to 113°.
Inventors
- 👤 Hiroshi Tomioka
- 👤 Hiroyuki Takuhara
- 👤 Shin-ichi Tochihara
- 👤 Tsuyoshi Kanke
- 👤 Yutaka Kurabayashi
- 👤 Hiromichi Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:49
CPC Classifications
G; G01; G01D; G01D11/00; C; C09; C09D; C09D11/00; C09D11/30; C09D11/40; H; H04; H04N; H04N1/00; H04N1/46; H04N1/54
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
137 words
An image-forming method, comprising performing image formation on the basis of pixel data by using at least a yellow recording agent, a magenta recording agent, and a third recording agent, wherein a color represented on a recording medium by the third recording agent on a color space of CIE-L*a*b* has a higher lightness than a lightness of a color that is represented on the recording medium by a combination of the yellow recording agent and the magenta recording agent, and that has the same hue as that of the color represented on the recording medium by the third recording agent, and wherein a difference in hue angle on the color space between a color represented by the yellow recording agent and a color represented by the magenta recording agent is in a range of 60 to 113°.
Claim 2
Dependent Claim
137 words
An image-forming method, comprising performing image formation on the basis of pixel data by using at least a yellow recording agent, a magenta recording agent, and a third recording agent, wherein a color represented on a recording medium by the third recording agent on a color space of CIE-L*a*b* has a higher lightness than a lightness of a color that is represented on the recording medium by a combination of the yellow recording agent and the magenta recording agent, and that has the same hue as that of the color represented on the recording medium by the third recording agent, and wherein a difference in hue angle on the color space between a color represented by the yellow recording agent and a color represented by the magenta recording agent is in a range of 60 to 113°.
Claim 3
Dependent Claim
37 words
An image-forming method according to claim 1 , wherein a hue angle on the color space of the color represented on the recording medium by the third recording agent is in a range of 50 to 65°.
Claim 4
Dependent Claim
66 words
An image-forming method according to claim 1 , wherein a hue angle on the color space of the color represented on the recording medium by the yellow recording agent is in a range of 70 to 100°, and a hue angle on the color space of the color represented on the recording medium by the magenta recording agent is in a range of 25 to 30°.
Claim 5
Dependent Claim
74 words
An image-forming method according to claim 1 , wherein a hue angle between the color represented by the yellow recording agent and the color represented by the third recording agent is in a range of 10 to 45°, and a difference in hue angle on the color space between the color represented by the magenta recording agent and the color represented by the third recording agent is in a range of 35 to 85°.
Claim 6
Dependent Claim
20 words
An image-forming method according to claim 1 , wherein a cyan recording agent is additionally used as the recording agent.
Claim 7
Dependent Claim
143 words
An image-forming method according to claim 5 , wherein at least one of a fifth recording agent and a sixth recording agent is used as the recording agent; wherein a color represented on the recording medium by the fifth recording agent on the color space has a higher lightness than a lightness of a color reproduction region represented on the recording medium by a combination of the yellow recording agent and the cyan recording agent, and has a hue angle in the color reproduction region; and wherein a color represented on the recording medium by the sixth recording agent on the color space has a higher lightness than a lightness of a color reproduction region represented on the recording medium by a combination of the magenta recording agent and the cyan recording agent, and has a hue angle in the color reproduction region.
Claim 8
Dependent Claim
33 words
An image-forming method according to claim 1 , wherein an ink is used as the recording agent and a dot of the ink is formed on the recording medium to perform image formation.
Claim 9
Dependent Claim
47 words
An image-forming method according to claim 1 , wherein, when pixel data corresponding to colors in gamuts of yellow and magenta is outputted, the pixel data is allowed to contain data for at least one of yellow and magenta as well as data for the third ink.
Claim 10
Dependent Claim
137 words
An image-forming apparatus for performing image formation on the basis of pixel data by using at least a yellow recording agent, a magenta recording agent, and a third recording agent, wherein a color represented on a recording medium by the third recording agent on a color space of CIE-L*a*b* has a higher lightness than a lightness of a color that is represented on the recording medium by a combination of the yellow recording agent and the magenta recording agent, and that has the same hue as that of the color represented on the recording medium by the third recording agent, and wherein a difference in hue angle on the color space between a color represented by the yellow recording agent and a color represented by the magenta recording agent is in a range of 60 to 113°.
Claim 11
Dependent Claim
137 words
An image-forming apparatus for performing image formation on the basis of pixel data by using at least a yellow recording agent, a magenta recording agent, and a third recording agent, wherein a color represented on a recording medium by the third recording agent on a color space of CIE-L*a*b* has a higher lightness than a lightness of a color that is represented on the recording medium by a combination of the yellow recording agent and the magenta recording agent, and that has the same hue as that of the color represented on the recording medium by the third recording agent, and wherein a difference in hue angle on the color space between a color represented by the yellow recording agent and a color represented by the magenta recording agent is in a range of 60 to 113°.
Claim 12
Dependent Claim
115 words
An ink set, comprising a yellow ink, a magenta ink, and a third ink, wherein a color represented on a recording medium by the third ink on a color space of CIE-L*a*b* has a higher lightness than a lightness of a color that is represented on the recording medium by a combination of the yellow ink and the magenta ink, and that has the same hue as that of the color represented on the recording medium by the third ink, and wherein a difference in hue angle on the color space between a color represented by the yellow ink and a color represented by the magenta ink is in a range of 60 to 113°.
Claim 13
Dependent Claim
115 words
An ink set, comprising a yellow ink, a magenta ink, and a third ink, wherein a color represented on a recording medium by the third ink on a color space of CIE-L*a*b* has a higher lightness than a lightness of a color that is represented on the recording medium by a combination of the yellow ink and the magenta ink, and that has the same hue as that of the color represented on the recording medium by the third ink, and wherein a difference in hue angle on the color space between a color represented by the yellow ink and a color represented by the magenta ink is in a range of 60 to 113°.
Claim 14
Dependent Claim
117 words
A third ink to be used with at least a yellow ink and a magenta ink, wherein a color represented on a recording medium by the third ink on a color space of CIE-L*a*b* has a higher lightness than a lightness of a color that is represented on the recording medium by a combination of the yellow ink and the magenta ink, and that has the same hue as that of the color represented on the recording medium by the third ink, and wherein a difference in hue angle on the color space between a color represented by the yellow ink and a color represented by the magenta ink is in a range of 60 to 113°.
Claim 15
Dependent Claim
117 words
A third ink to be used with at least a yellow ink and a magenta ink, wherein a color represented on a recording medium by the third ink on a color space of CIE-L*a*b* has a higher lightness than a lightness of a color that is represented on the recording medium by a combination of the yellow ink and the magenta ink, and that has the same hue as that of the color represented on the recording medium by the third ink, and wherein a difference in hue angle on the color space between a color represented by the yellow ink and a color represented by the magenta ink is in a range of 60 to 113°.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2010-06-11 | 2010-12-11 | 2011-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2014-06-11 | 2014-12-11 | 2015-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2018-06-11 | 2018-12-11 | 2019-06-12 | $7700.00 | Window Closed / Lapsed |