EP0750995A1
Expired / Lapsed
EP
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A method for ink-jet recording and an ink-jet recording apparatus
Assignee: Canon Inc
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Filing: 1996-06-28
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Granted: —
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Expires: 2016-06-28
Abstract
Abstract A method for making a record with multiple levels of a gradation on a recording medium, has the following steps: preparing a device for ejecting inks of different densities in a plurality of ejection amounts, respectively; linearizing a relationship between gradation and image density so that levels of the gradation of each of said inks of different densities can be interpolated with others; and making a record on a recording medium in response to multiple-level recording data in accordance with the relationship between gray scale and image density.
Inventors
- 👤 Hiroyuki C/O Canon K.K. Ishinaga
- 👤 Masami C/O Canon K.K. Ikeda
- 👤 Tsutomu C/O Canon K.K. Abe
- 👤 Toshio C/O Canon K.K. Kashino
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 15:28
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/015; B41J2/04; B41J2/045; B41J2/04501; B41J2/04595; B41J2/04533; B41J2/0458; B41J2/04593; B41J2/205; B41J2/2056; B41J2/21; B41J2/2107; B41J2/2121; B41J2/2128
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
90 words
A method for making a record with multiple levels of a gradation on a recording medium, characterized by comprising the steps of: preparing a means for ejecting inks of different densities in a plurality of ejection amounts, respectively; linearizing a relationship between gradation and image density so that levels of said gradation of each of said inks of different densities can be interpolated with others; and making a record on a recording medium in response to multiple-level recording data in accordance with said relationship between gray scale and image density.
Claim 2
Dependent Claim
74 words
A gradation recording method for forming pixels of different image densities by ejecting liquid droplets on a recording medium, characterized by comprising the step of making a record on said recording medium by using: a plurality of image densities obtained by a plurality of types of inks having different ink densities; and at least one image density between two of said plurality of image densities, obtained by changing an ejection amount of said ink.
Claim 3
Dependent Claim
34 words
A method as claimed in claim 1, characterized in that said means for ejecting inks of different densities in a plurality of ejection amounts is a plurality of energy-generating means arranged in one nozzle.
Claim 4
Dependent Claim
27 words
A method as claimed in claim 1 or 2, characterized in that a line of nozzles that constitutes one recording head has said inks of different densities.
Claim 5
Dependent Claim
31 words
A method as claimed in claim 1 or 2, characterized in that a plurality of recording heads includes at least one recording head having at least said inks of different densities.
Claim 6
Dependent Claim
91 words
An ink-jet recording apparatus for making a record with multiple levels of a gradation on a recording medium, characterized by comprising means for ejecting inks of different densities in a plurality of ejection amounts, respectively; means for linearizing a relationship between gradation and image density so that levels of said gradation of each of said inks of different densities can be interpolated with others; and means for making a record on a recording medium in response to multiple-level recording data in accordance with said relationship between gray scale and image density.
Claim 7
Dependent Claim
66 words
An ink-jet recording apparatus for forming pixels of different image densities by ejecting liquid droplets on a recording medium, characterized by comprising: means for obtaining a plurality of image densities by a plurality of types of inks having different ink densities; and means for obtaining at least one image density between two of said plurality of image densities by changing an ejection amount of said ink.
Claim 8
Dependent Claim
23 words
A method as claimed in claim 2, characterised in that said image densities are non-linearly changed by changing said ejection amounts of inks.
Claim 9
Dependent Claim
25 words
An ink-jet recording apparatus as claimed in claim 7, characterised in that said image densities are non-linearly changed by changing said ejection amounts of inks.
Claim 10
Dependent Claim
146 words
A recording apparatus or process for recording an image on a recording medium using an ejection means capable of recording a number of gradations and/or colors by, for each pixel of an image, using any one or more of the following options: (1) selecting one or a combination of ink ejection nozzle types; (2) selecting one or a combination of any one or more of the amount of ink, concentration, viscosity and color for an ink type or each of a number of ink types; (3) controlling drive pulses to at least one ink ejection nozzle; (4) selecting one or a combination of different drive heaters for at least one ink ejection nozzle; and (5) using the available ones of options (1) to (4) above to interpolate between gradations and/or colors for example by linearising or adjusting the relationship between gradation and/or color and image densities.
References Cited (Backward Citations)
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