EP0400680A2
Expired / Lapsed
EP
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Recording apparatus, and method for forming plural dots in a pixel, for use therein
Assignee: Canon Inc
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Filing: 1990-06-01
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Granted: —
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Expires: 2010-06-01
Abstract
Abstract There is disclosed a dot forming method and a recording apparatus, suitable for unprocessed recording medium, such as plain paper showing fluctuation in the ink absorbing ability, or a plastic sheet with low ink absorbing ability. At the formation of each pixel with plural dots, said dots are so distributed that they are not continuously but are mutually complementary in the transverse and longitudinal directions of the pixel and also at least in the boundary area of adjacent pixels.
Inventors
- 👤 Koji C/O Canon Kabushiki Kaisha Terasawa
- 👤 Makoto C/O Canon Kabushiki Kaisha Takemura
- 👤 Katsuyuki C/O Canon Kabushiki Kaisha Yokoi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 09:43
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/46; H04N1/52; H04N1/40; H04N1/405; H04N1/4051
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
114 words
A recording apparatus for forming a pixel a matrix of plural dots formed on a recording medium, comprising: a recording mechanism having plural discharge units for discharging a droplet of recording liquid; a recording mode for recording on an unprocessed recording medium with said recording mechanism; and recording control means for causing, in said recording mode, said recording mechanism to arrange plural dots constituting a pixel in such a manner that said dots are not continuous but separated in the transverse and longitudinal directions of the pixel, and to arrange plural dots in the boundary area of adjacent pixels in such a manner that said dots are not continuous but separated in said directions.
Claim 2
Dependent Claim
114 words
A recording apparatus for forming a pixel a matrix of plural dots formed on a recording medium, comprising: a recording mechanism having plural discharge units for discharging a droplet of recording liquid; a recording mode for recording on an unprocessed recording medium with said recording mechanism; and recording control means for causing, in said recording mode, said recording mechanism to arrange plural dots constituting a pixel in such a manner that said dots are not continuous but separated in the transverse and longitudinal directions of the pixel, and to arrange plural dots in the boundary area of adjacent pixels in such a manner that said dots are not continuous but separated in said directions.
Claim 3
Dependent Claim
45 words
An apparatus according to claim 1, wherein said control means is adapted, for formation of said plural dots with the maximum density within a pixel, to form said dots in mutually complementary positions in the horizontal and vertical directions of the matrix constituting a pixel.
Claim 4
Dependent Claim
50 words
An apparatus according to claim 1, wherein said recording mechanism is provided with plural recording heads, and is adapted, for forming said plural dots in different densities or in different colors, to overlay liquid droplets discharged from at least two of said plural recording heads in a substantially same position.
Claim 5
Dependent Claim
87 words
An apparatus according to claim 2, wherein said recording mechanism is provided with plural recording heads, and is adapted, for forming said plural dots in different densities or in different colors, to overlay liquid droplets discharged from at least two of said plural recording heads in a substantially same position, and each of said recording heads is provided with an electrothermal converting element for liquid droplets formation corresponding to each discharge unit and is adapted to form a liquid droplet by causing film boiling in recording liquid.
Claim 6
Dependent Claim
58 words
An apparatus according to claim 1, having a second recording mode for recording on a processed recording medium of high liquid droplet absorbing ability, different from said unprocessed recording medium, and said recording control means is adapted, in said second recording mode, to form dots in a pixel with a higher density than in the first-mentioned recording mode.
Claim 7
Dependent Claim
43 words
An apparatus according to claim 5, wherein each of the recording heads is provided with an electrothermal converting element for liquid droplet formation corresponding to each discharge unit and is adapted to form a liquid droplet by causing membrane boiling in recording liquid.
Claim 8
Dependent Claim
43 words
An apparatus according to claim 1, wherein each of the recording heads is provided with an electrothermal converting element for liquid droplet formation corresponding to each discharge unit and is adapted to form a liquid droplet by causing membrane boiling in recording liquid.
Claim 9
Dependent Claim
85 words
A recording method for forming plural dots in a pixel on an unprocessed recording medium, comprising steps of: forming plural dots of a matrix arrangement constituting a pixel on a recording medium in such a manner that said dots are not continuous but separated in the transverse and longitudinal directions thereof; and forming dots in the boundary of adjacent pixels on the recording medium in such a manner that the pixels of said pixels are not continuous but separated in said transverse and longitudinal directions.
Claim 10
Dependent Claim
85 words
A recording method for forming plural dots in a pixel on an unprocessed recording medium, comprising steps of: forming plural dots of a matrix arrangement constituting a pixel on a recording medium in such a manner that said dots are not continuous but separated in the transverse and longitudinal directions thereof; and forming dots in the boundary of adjacent pixels on the recording medium in such a manner that the pixels of said pixels are not continuous but separated in said transverse and longitudinal directions.
Claim 11
Dependent Claim
44 words
A method according to claim 8, wherein said dots are formed by ink droplets discharged from plural recording heads corresponding respectively to discharge units, and at least one of color dots is formed by overlaid depositions of liquid droplets from the plural recording heads.
Claim 12
Dependent Claim
60 words
A method according to claim 6, adapted to form pixels in the course of a scanning motion of the recording head relative to the recording medium, wherein said adjacent pixels include those arranged in the direction of said scanning motion, and those adjacent between a line formed by said scanning motion and other line formed by a next scanning motion.
Claim 13
Dependent Claim
51 words
A recording apparatus for effecting recording by forming a pixel with a dot matrix of ink dots deposited onto a recording medium according to dot data, comprising: dot data supply means for supplying dot data in such a manner as to maximize the distance of adjacent dots in said dot matrix.
Claim 14
Dependent Claim
51 words
A recording apparatus for effecting recording by forming a pixel with a dot matrix of ink dots deposited onto a recording medium according to dot data, comprising: dot data supply means for supplying dot data in such a manner as to maximize the distance of adjacent dots in said dot matrix.
Claim 15
Dependent Claim
37 words
An apparatus according to claim 11, comprising mode setting means for selecting, according to the recording medium employed, a recording mode for effecting recording by a pixel consisting of the dot matrix based on said dot data.
Claim 16
Dependent Claim
20 words
An apparatus according to claim 12, wherein said ink dot is deposited by an ink droplet discharged by thermal energy.
Claim 17
Dependent Claim
79 words
A recording apparatus for effecting recording by forming a pixel with a dot pattern of ink dots deposited onto a recording medium according to dot data, comprising: dot data supply means for supplying dot data in such a manner as to maximize the distance of adjacent dots in said dot pattern and to maximize the distance between the dots of a pixel constituting boundary thereof to an adjacent pixel and the dots of said adjacent pixel, constituting boundary thereof.
Claim 18
Dependent Claim
79 words
A recording apparatus for effecting recording by forming a pixel with a dot pattern of ink dots deposited onto a recording medium according to dot data, comprising: dot data supply means for supplying dot data in such a manner as to maximize the distance of adjacent dots in said dot pattern and to maximize the distance between the dots of a pixel constituting boundary thereof to an adjacent pixel and the dots of said adjacent pixel, constituting boundary thereof.
Claim 19
Dependent Claim
37 words
An apparatus according to claim 14, comprising mode setting means for selecting, according to the recording medium employed, a recording mode for effecting recording by a pixel consisting of the dot pattern based on said dot data.
Claim 20
Dependent Claim
20 words
An apparatus according to claim 14, wherein said ink dot is deposited by an ink droplet discharged by thermal energy.
References Cited (Backward Citations)
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