US5751310A
Expired / Lapsed
US
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Ink jet recording apparatus capable of preventing blotting at boundary of colors and recording method therefor
Assignee: Canon Inc
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Filing: 1994-10-27
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Granted: 1998-05-12
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Expires: 2014-10-27
Abstract
Abstract In image recording by discharging plural inks of different characteristics onto a recording medium, recording pixels to be recorded by at least one of the inks of either yellow, magenta or cyan color subjected to pixel expansion are expanded in four direction, then a logic product is calculated between the expanded pixels and the pixels to be recorded with an ink which is black not subjected to pixel expansion, and the recording pixels to be recorded by the ink which is black not subjected to pixel expansion are replaced by the pixels formed by the inks (Y, M, C) subjected to pixel expansion. Thus high-quality image recording is made possible even in case the inks of different properties are brought into mutual contact.
Inventors
- 👤 Kentaro Yano
- 👤 Naoji Otsuka
- 👤 Jiro Moriyama
- 👤 Nobuyuki Kuwabara
- 👤 Isao Ebisawa
- 👤 Atsushi Arai
- 👤 Hisao Yaegashi
- 👤 Toshiharu Inui
- 👤 Kiichiro Takahashi
- 👤 Osamu Iwasaki
- 👤 Daigoro Kanematsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:20
CPC Classifications
G; G06; G06K; G06K15/00; G06K15/02; G06K15/10; G06K15/102; H; H04; H04N; H04N1/00; H04N1/46; H04N1/56; H04N1/58; H04N1/60; H04N1/6016; H04N1/6022; G06K2215/00; G06K2215/0082; G06K2215/0094
Claims Analysis
Total Claims: 48
Claim 1
Independent Claim
154 words
An ink jet recording apparatus for image recording by discharging a plurality of inks of different characteristics onto a recording medium, comprising: expansion means for expanding a recording pixel, the recording pixel to be recorded with at least an ink subjected to pixel expansion, in four directions to a peripheral area; logic product means for calculating a logic product of the pixel expanded by said expansion means and an other recording pixel to be recorded by an ink not subjected to pixel expansion to obtain a result of calculation; and replacement means for replacing the other recording pixel to be recorded by said ink not subjected to pixel expansion with the pixel to be recorded by said plurality of inks, according to the result of calculation by said logic product means, wherein said ink subjected to pixel expansion and said ink not subjected to pixel expansion are different in penetration characteristics from each other.
Claim 2
Dependent Claim
154 words
An ink jet recording apparatus for image recording by discharging a plurality of inks of different characteristics onto a recording medium, comprising: expansion means for expanding a recording pixel, the recording pixel to be recorded with at least an ink subjected to pixel expansion, in four directions to a peripheral area; logic product means for calculating a logic product of the pixel expanded by said expansion means and an other recording pixel to be recorded by an ink not subjected to pixel expansion to obtain a result of calculation; and replacement means for replacing the other recording pixel to be recorded by said ink not subjected to pixel expansion with the pixel to be recorded by said plurality of inks, according to the result of calculation by said logic product means, wherein said ink subjected to pixel expansion and said ink not subjected to pixel expansion are different in penetration characteristics from each other.
Claim 3
Dependent Claim
46 words
An ink jet recording apparatus according to claim 1, wherein said replacement means includes a replacement mask pattern for each said ink, and effects said replacement by calculating a logic product of said replacement mask pattern and the result of calculation by said logic product means.
Claim 4
Dependent Claim
47 words
An ink jet recording apparatus according to claim 1, further comprising reception means for receiving signals indicating the presence or absence of said recording pixels in binary recording data; wherein said expansion means, logic product means and replacement means are adapted to process said binary recording data.
Claim 5
Dependent Claim
36 words
An ink jet recording apparatus according to claim 1, wherein said ink subjected to pixel expansion is an ink of penetration type, while said ink not subjected to pixel expansion is an ink of evaporation type.
Claim 6
Dependent Claim
29 words
An ink jet recording apparatus according to claim 4, wherein said ink of penetration type is a color ink while the ink of evaporation type is a black ink.
Claim 7
Dependent Claim
21 words
An ink jet recording apparatus according to claim 5, wherein said color ink is inks of cyan, magenta and yellow colors.
Claim 8
Dependent Claim
22 words
An ink jet recording apparatus according to claim 1, wherein said plural inks of different characteristics are discharged from a recording head.
Claim 9
Dependent Claim
18 words
An ink jet recording apparatus according to claim 7, further comprising a carriage for supporting said recording head.
Claim 10
Dependent Claim
25 words
An ink jet recording apparatus according to claim 7, further comprising transport means for transporting the recording medium to be recorded by said recording head.
Claim 11
Dependent Claim
17 words
An ink jet recording apparatus according to claim 1, adapted to be applied to a copying apparatus.
Claim 12
Dependent Claim
17 words
An ink jet recording apparatus according to claim 1, adapted to be applied to a facsimile apparatus.
Claim 13
Dependent Claim
17 words
An ink jet recording apparatus according to claim 1, adapted to be applied to a computer terminal.
Claim 14
Dependent Claim
20 words
An ink jet recording apparatus according to claim 1, wherein each of said plural inks is discharged by thermal energy.
Claim 15
Dependent Claim
99 words
An ink jet recording apparatus for image recording by discharging a plurality of inks of different characteristics onto a recording medium, comprising: boundary detection means for detecting a boundary around an object pixel by detecting a presence of a pixel to be formed by a given said ink of different characteristics within a distance of 1 mm, on the recording medium; and replacement means for replacing said object pixel with a pixel to be formed by a plurality of inks including said ink of different characteristics, according to the detection of the boundary pixel by said boundary detection means.
Claim 16
Dependent Claim
99 words
An ink jet recording apparatus for image recording by discharging a plurality of inks of different characteristics onto a recording medium, comprising: boundary detection means for detecting a boundary around an object pixel by detecting a presence of a pixel to be formed by a given said ink of different characteristics within a distance of 1 mm, on the recording medium; and replacement means for replacing said object pixel with a pixel to be formed by a plurality of inks including said ink of different characteristics, according to the detection of the boundary pixel by said boundary detection means.
Claim 17
Dependent Claim
35 words
An ink jet recording apparatus according to claim 14, wherein the ink for forming said object pixel is an ink of evaporation type, while said ink of different characteristics is an ink of penetration type.
Claim 18
Dependent Claim
29 words
An ink jet recording apparatus according to claim 15, wherein said ink of penetration type is a color ink, and said ink of evaporation type is a black ink.
Claim 19
Dependent Claim
21 words
An ink jet recording apparatus according to claim 16, wherein said color ink is inks of cyan, magenta and yellow colors.
Claim 20
Dependent Claim
22 words
An ink jet recording apparatus according to claim 14, wherein said plural inks of different characteristics are discharged from a recording head.
Claim 21
Dependent Claim
18 words
An ink jet recording apparatus according to claim 18, further comprising a carriage for supporting said recording head.
Claim 22
Dependent Claim
25 words
An ink jet recording apparatus according to claim 18, further comprising transport means for transporting the recording medium to be recorded by said recording head.
Claim 23
Dependent Claim
17 words
An ink jet recording apparatus according to claim 14, adapted to be applied to a copying apparatus.
Claim 24
Dependent Claim
17 words
An ink jet recording apparatus according to claim 14, adapted to be applied to a facsimile apparatus.
Claim 25
Dependent Claim
17 words
An ink jet recording apparatus according to claim 14, adapted to be applied to a computer terminal.
Claim 26
Dependent Claim
20 words
An ink jet recording apparatus according to claim 14, wherein each of said plural inks is discharged by thermal energy.
Claim 27
Dependent Claim
137 words
An ink jet recording apparatus for image recording by discharging a black ink and at least a color ink onto a recording medium, comprising: a black memory and a color memory for two-dimensionally storing, respectively, a recording data, corresponding to a plurality of pixels where black and color inks are respectively to be discharged; expansion means for two-dimensionally expanding the recording data of said color memory; logic product means for calculating a logic product, for each said pixel, of the recording data, expanded by said expansion means, of said color memory and the recording data of said black memory, to obtain a result of calculation; and replacement means for replacing the recording data of said black memory with the corresponding recording data of said color memory, according to the result of calculation of said logic product means.
Claim 28
Dependent Claim
137 words
An ink jet recording apparatus for image recording by discharging a black ink and at least a color ink onto a recording medium, comprising: a black memory and a color memory for two-dimensionally storing, respectively, a recording data, corresponding to a plurality of pixels where black and color inks are respectively to be discharged; expansion means for two-dimensionally expanding the recording data of said color memory; logic product means for calculating a logic product, for each said pixel, of the recording data, expanded by said expansion means, of said color memory and the recording data of said black memory, to obtain a result of calculation; and replacement means for replacing the recording data of said black memory with the corresponding recording data of said color memory, according to the result of calculation of said logic product means.
Claim 29
Dependent Claim
21 words
An ink jet recording apparatus according to claim 25, wherein said color ink is inks of cyan, magenta and yellow colors.
Claim 30
Dependent Claim
62 words
An ink jet recording apparatus according to claim 26, wherein said color memory includes cyan, magenta and yellow memories, and said replacement means includes replacement mask patterns respectively corresponding to each color and effects replacement to said cyan, magenta and yellow memories by calculating the logic products of said replacement mask patterns and the result of calculation by said logic product means.
Claim 31
Dependent Claim
29 words
An ink jet recording apparatus according to claim 25, wherein said color ink is an ink of penetration type, and said black ink is an ink of evaporation type.
Claim 32
Dependent Claim
22 words
An ink jet recording apparatus according to claim 25, wherein said black ink and color ink are discharged from a recording head.
Claim 33
Dependent Claim
18 words
An ink jet recording apparatus according to claim 29, further comprising a carriage for supporting said recording head.
Claim 34
Dependent Claim
25 words
An ink jet recording apparatus according to claim 29, further comprising transport means for transporting the recording medium to be recorded by said recording head.
Claim 35
Dependent Claim
17 words
An ink jet recording apparatus according to claim 25, adapted to be applied to a copying apparatus.
Claim 36
Dependent Claim
17 words
An ink jet recording apparatus according to claim 25, adapted to be applied to a facsimile apparatus.
Claim 37
Dependent Claim
17 words
An ink jet recording apparatus according to claim 25, adapted to be applied to a computer terminal.
Claim 38
Dependent Claim
19 words
An ink jet recording apparatus according to claim 25, wherein each of said inks is discharged by thermal energy.
Claim 39
Dependent Claim
132 words
An ink jet recording method for image recording by discharging a plurality of inks of different characteristics onto a recording medium, comprising steps of: expanding a pixel to be recorded by at least an ink subjected to pixel expansion in four directions to a peripheral; calculating a logic product of the expanded pixel and an other recording pixel to be recorded by an ink not subjected to pixel expansion to obtain a result of calculation; replacing the other recording pixel to be recorded by said the ink not subjected to pixel expansion with the pixel to be recorded by said plurality of inks subjected to pixel expansion, according to the result of calculation of said logic product; and discharging the inks corresponding to the replacement of the pixels onto the recording medium.
Claim 40
Dependent Claim
132 words
An ink jet recording method for image recording by discharging a plurality of inks of different characteristics onto a recording medium, comprising steps of: expanding a pixel to be recorded by at least an ink subjected to pixel expansion in four directions to a peripheral; calculating a logic product of the expanded pixel and an other recording pixel to be recorded by an ink not subjected to pixel expansion to obtain a result of calculation; replacing the other recording pixel to be recorded by said the ink not subjected to pixel expansion with the pixel to be recorded by said plurality of inks subjected to pixel expansion, according to the result of calculation of said logic product; and discharging the inks corresponding to the replacement of the pixels onto the recording medium.
Claim 41
Dependent Claim
106 words
An ink jet recording method for image recording by discharging a plurality of inks of different characteristics onto a recording medium, comprising steps of: detecting a boundary around an object pixel by detecting a presence of a pixel to be formed by a given said ink of different characteristics within a distance of 1 mm on the recording medium; replacing said object pixel with a pixel to be formed by a plurality of inks including said ink of different characteristics according to a result of detection in said detecting step; and discharging those of the inks corresponding to the replacement of pixels onto the recording medium.
Claim 42
Dependent Claim
106 words
An ink jet recording method for image recording by discharging a plurality of inks of different characteristics onto a recording medium, comprising steps of: detecting a boundary around an object pixel by detecting a presence of a pixel to be formed by a given said ink of different characteristics within a distance of 1 mm on the recording medium; replacing said object pixel with a pixel to be formed by a plurality of inks including said ink of different characteristics according to a result of detection in said detecting step; and discharging those of the inks corresponding to the replacement of pixels onto the recording medium.
Claim 43
Dependent Claim
140 words
An ink jet recording method for image recording by discharging a black ink and at least a color ink onto a recording medium, comprising steps of: two-dimensionally storing a recording data, corresponding to a plurality of pixels where black ink and color ink are to be respectively discharged, in a black memory and a color memory, respectively; two-dimensionally expanding the recording data of said color memory; calculating a logic product, for each said pixel, of the expanded recording data of the color memory and the recording data of the black memory, to obtain a result of calculation; replacing the recording data of said black memory with the corresponding recording data of said color memory according to the result of calculation of the logic product; and discharging those of the inks corresponding to the replacement of pixels onto the recording medium.
Claim 44
Dependent Claim
140 words
An ink jet recording method for image recording by discharging a black ink and at least a color ink onto a recording medium, comprising steps of: two-dimensionally storing a recording data, corresponding to a plurality of pixels where black ink and color ink are to be respectively discharged, in a black memory and a color memory, respectively; two-dimensionally expanding the recording data of said color memory; calculating a logic product, for each said pixel, of the expanded recording data of the color memory and the recording data of the black memory, to obtain a result of calculation; replacing the recording data of said black memory with the corresponding recording data of said color memory according to the result of calculation of the logic product; and discharging those of the inks corresponding to the replacement of pixels onto the recording medium.
Claim 45
Dependent Claim
28 words
An ink jet recording apparatus according to claim 5, wherein pixel expansion by said expansion means is expanded for a pixel to be recorded in the color ink.
Claim 46
Dependent Claim
23 words
An ink jet recording apparatus as in claim 25, further comprising changing means for changing an amount of expansion by said expansion means.
Claim 47
Dependent Claim
23 words
An ink jet recording method as in claim 36, further comprising the step of changing an amount of expansion in said expanding step.
Claim 48
Dependent Claim
24 words
An ink jet recording method as in claim 38, further comprising the step of changing an amount of expansion in said two-dimensionally expanding step.
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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) | 2001-05-11 | 2001-11-10 | 2002-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-05-11 | 2005-11-10 | 2006-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-05-11 | 2009-11-10 | 2010-05-12 | $7700.00 | Window Closed / Lapsed |