Patent EP0517519A2 successfully refreshed from Google Patents.
EP0517519A2
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Recording apparatus and recording method
Assignee: Canon Inc
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Filing: 1992-06-04
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Granted: —
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Expires: 2012-06-04
Abstract
Abstract Each of pixels (No. 1 to N) of recorded image is formed by a plurality of dots composed with ink droplets ejected from a plurality of different orifices (No. 1 to M) at individual different main-scannings (No. 1, 2, 3 and so on). With this recording process, the variation of ink ejection characteristics between a plurality of orifices in a recording head can be reduced in forming pixels.
Inventors
- 👤 Hideki c/o Canon Kabushiki Kaisha Tanaka
- 👤 Yasuyuki C/O Canon Kabushiki Kaisha Tamura
- 👤 Hiroto c/o Canon Kabushiki Kaisha Takahashi
- 👤 Shinji c/o Canon Kabushiki Kaisha Takagi
- 👤 Makoto C/O Canon Kabushiki Kaisha Shioya
- 👤 Masayoshi C/O Canon Kabushiki Kaisha Tachihara
- 👤 Tatsuo c/o Canon Kabushiki Kaisha Kimura
- 👤 Jun c/o Canon Kabushiki Kaisha Ashiwa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 15:47
CPC Classifications
B; B41; B41J; B41J2/00; B41J2/005; B41J2/01; B41J2/21; B41J2/2132; B41J19/00; B41J19/16
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
131 words
A recording method for recording an image with a set of pixels composed of a dot, characterized by comprising the steps of: providing for a recording head having a plurality of recording elements for forming the dot on a recording medium; allowing a first relative movement between said recording head and said recording medium; allowing a second relative movement between said recording head and said recording medium, said second relative movement being different from said first relative movement in a direction; and forming a plurality of dots in each of said pixels, said plurality of dots being formed by using an individual different recording element of said plurality of recording elements every said first relative movement so that said plurality of dots are formed in individual different positions in said pixel.
Claim 2
Dependent Claim
38 words
A recording method as claimed in claim 1, characterized in that said plurality of dots are formed in individual different positions in a direction of said first relative movement and/or in a direction of said second relative movement.
Claim 3
Dependent Claim
153 words
A recording method as claimed in claim 2, characterized in that a condition including { (N - 1)b + 1}/a ≧ 2; NK/a ≧ m; and both of a/b and b/a are not integers, is satisfied with a set of N, K, m, a and b, where p is a width of said pixel in the direction of said second relative movement; s is a displacement of said second relative movement; q is a pitch of said plurality of recording elements in the direction of said second relative movement; N is the number of said plurality of recording elements; K is the maximum number of said plurality of dots being able to be formed in said pixel by using said individual different recording element every said first relative movement; m is the maximum number of said plurality of dots to be formed in said pixel; and s = ap and q = bp.
Claim 4
Dependent Claim
153 words
A recording method as claimed in claim 2, characterized in that a condition including { (N - 1)b + 1}/a ≧ 2; NK/a = m; both of a/b and b/a are not integers; and Nb/a is not an integer, is satisfied with a set of N, K, m, a and b, where p is a width of said pixel in the direction of said second mode; s is a displacement of said second relative movement; q is a pitch of said plurality of recording elements in the direction of said second mode; N is the number of said plurality of recording elements; K is the maximum number of said plurality of dots being able to be formed in said pixel by using said individual different recording element every said first relative movement; m is the maximum number of said dots to be formed in said pixel; and s =ap and q = bp.
Claim 5
Dependent Claim
151 words
A recording method as claimed in claim 2, characterized in that a condition including that β and η are a relatively prime numbers, N = α′η > 1, gα′ξ′ > 1 and β ξ′ > 1, is satisfied by a set of α′, β, η, ξ′, N, a, b, s, p and q, where p is a width of said pixel in the direction of said second mode; s is a displacement of said second relative movement; q is a pitch of said plurality of recording elements in the direction of said second mode; N is the number of said plurality of recording elements; s = ap and q = bp α′ = α/g and ξ′ = ξ/g, a = η/ξ with η and ξ being relatively prime numbers, b = β/η with β and α being relatively prime numbers, and g is the greatest common measure of α and β.
Claim 6
Dependent Claim
28 words
A recording method as claimed in claim 2, characterized in that adjacent recording elements of said plurality of recording elements are not used concurrently in forming the dots.
Claim 7
Dependent Claim
114 words
A recording method as claimed in claim 6, characterized in that a condition b/g > (N/s) - 1 is satisfied with a set of b, g, N and s, where N is the number of said plurality of recording elements of said recording head; q is a pitch of said plurality of recording elements ; a plurality of recording elements forming dots concurrently is arranged with a periodical distance bq where b is a natural number greater than or equal to 2; a displacement of said second relative movement is sq, where s is a natural number greater than or equal to 2; and g is the greatest common measure of s and b.
Claim 8
Dependent Claim
34 words
A recording method as claimed in claim 7, characterized in that each distance between adjacent dots of said plurality of dots is different from each other in the direction of said first relative movement.
Claim 9
Dependent Claim
37 words
A recording method as claimed in claim 7, characterized in that said plurality of dots are formed in individual different position in responsive to a position of said pixel in the direction of said first relative movement.
Claim 10
Dependent Claim
54 words
A recording method as claimed in claim 2, characterized in that a recording element having no relation with forming said dot is made by shifting each of a plurality of said individual different recording elements in relation to a corresponding pixel, respectively, by each of a plurality of times of said second relative movement.
Claim 11
Dependent Claim
20 words
A recording method as claimed in claim 2, characterized in that a displacement of said second relative movement is variable.
Claim 12
Dependent Claim
75 words
A recording method as claimed in claim 2, characterized in that said recording head, as said recording element, having an orifice for ejecting an ink fluid and a thermal energy generation means for generating thermal energy for ejecting an ink fluid from said orifice, generates a bubble by said thermal energy so as to eject the ink fluid accompanied by generation of said bubble so that said dot is formed with said ejected ink fluid.
Claim 13
Dependent Claim
102 words
A recording method for recording an image with a set of pixels composed of a dot, characterized by comprising the steps of: providing for a recording head having a plurality of recording elements for forming the dot on a recording medium; allowing a relative movement between said recording head and said recording medium; and forming a plurality of dots in each of said pixels, said plurality of dots being formed by using an individual different recording element of said plurality of recording elements every said relative movement so that said plurality of dots are formed in individual different positions in said pixel.
Claim 14
Dependent Claim
154 words
A recording apparatus for recording an image with a set of pixels composed of a dot, characterized by comprising: a recording head having a plurality of recording elements for forming the dot on a recording medium; a first moving means for allowing a first relative movement between said recording head and said recording medium; a second moving means for allowing a second relative movement between said recording head and said recording medium, said second relative movement being different from said first relative movement in a direction; and a control means for controlling said recording head, said first moving means and said second moving means to form a plurality of dots in each of said pixels, said plurality of dots being formed by using an individual different recording element of said plurality of recording elements every said first relative movement so that said plurality of dots are formed in individual different positions in said pixel.
Claim 15
Dependent Claim
38 words
A recording apparatus as claimed in claim 14, characterized in that said plurality of dots are formed in individual different positions in a direction of said first relative movement and/or in a direction of said second relative movement.
Claim 16
Dependent Claim
151 words
A recording apparatus as claimed in claim 15, characterized in that a condition including { (N - 1)b + 1}/a ≧2; NK/a ≧ m; and both of a/b and b/a are not integers, is satisfied with a set of N, K, m, a and b, where p is a width of said pixel in the direction of said second relative movement; s is a displacement of said second relative movement; q is a pitch of said plurality of recording elements in the direction of said second relative movement; N is the number of said plurality of recording elements; K is the maximum number of said plurality dots being able to be formed in said pixel by using said individual different recording element every said first relative movement; m is the maximum number of said plurality of dots to be formed in said pixel; and s = ap and q = bp.
Claim 17
Dependent Claim
153 words
A recording apparatus as claimed in claim 15, characterized in that a condition including {(N - 1)b + 1}/a ≧ 2; NK/a = m; both of a/b and b/a are not integers; and Nb/a is not an integer, is satisfied with a set of N, K, m, a and b, where p is a width of said pixel in the direction of said second mode; s is a displacement of said second relative movement; q is a pitch of said plurality of recording elements in the direction of said second mode; N is the number of said plurality of recording elements; K is the maximum number of said plurality of dots being able to be formed in said pixel by using said individual different recording element every said first relative movement; m is the maximum number of said dots to be formed in said pixel; and s = ap and q = bp.
Claim 18
Dependent Claim
150 words
A recording apparatus as claimed in claim 15, characterized in that a condition including that β and η are relatively prime numbers, N = α′η > 1, gα′ξ′ > 1 and β ξ′ > 1, is satisfied by a set of α′, β, η, ξ′, N, a, b, s, p and q, where p is a width of said pixel in the direction of said second mode; s is a displacement of said second relative movement; q is a pitch of said plurality of recording elements in the direction of said second mode; N is the number of said plurality of recording elements; s = ap and q = bp. α′ = α/g and ξ′ = ξ/g, a = η/ξ with η and ξ being relatively prime numbers, b = β/α with β and a being relatively prime numbers, and g is the greatest common measure of α and β.
Claim 19
Dependent Claim
28 words
A recording apparatus as claimed in claim 15, characterized in that adjacent recording elements of said plurality of recording elements are not used concurrently in forming the dots.
Claim 20
Dependent Claim
114 words
A recording apparatus as claimed in claim 19, characterized in that a condition b/g > (N/s) - 1 is satisfied with a set of b, g, N and s, where N is the number of said plurality of recording elements of said recording head; q is a pitch of said plurality of recording elements ; a plurality of recording elements forming dots concurrently is arranged with a periodical distance bq where b is a natural number greater than or equal to 2; a displacement of said second relative movement is sq, where s is a natural number greater than or equal to 2; and g is the greatest common measure of s and b.
Claim 21
Dependent Claim
34 words
A recording apparatus as claimed in claim 20, characterized in that each distance between adjacent dots of said plurality of dots is different from each other in the direction of said first relative movement.
Claim 22
Dependent Claim
37 words
A recording apparatus as claimed in claim 20, characterized in that said plurality of dots are formed in individual different position in responsive to a position of said pixel in the direction of said first relative movement.
Claim 23
Dependent Claim
54 words
A recording apparatus as claimed in claim 15, characterized in that a recording element having no relation with forming said dot is made by shifting each of a plurality of said individual different recording elements in relative to a corresponding pixel respectively, by each of a plurality of times of said second relative movement.
Claim 24
Dependent Claim
20 words
A recording apparatus as claimed in claim 15, characterized in that a displacement of said second relative movement is variable.
Claim 25
Dependent Claim
75 words
A recording apparatus as claimed in claim 15, characterized in that said recording head, as said recording element, having an orifice for ejecting an ink fluid and a thermal energy generation means for generating thermal energy for ejecting an ink fluid from said orifice, generates a bubble by said thermal energy so as to eject the ink fluid accompanied by generation of said bubble so that said dot is formed with said ejected ink fluid.
Claim 26
Dependent Claim
115 words
A recording apparatus for recording an image with a set of pixels composed of a dot, characterized by comprising: a recording head having a plurality of recording elements for forming the dot on a recording medium; a moving means for allowing a relative movement between said recording head and said recording medium; and a control means for controlling said recording head, and said moving means to form a plurality of dots in each of said pixels, said plurality of dots being formed by using an individual different recording element of said plurality of recording elements every said first relative movement so that said plurality of dots are formed in individual different positions in said pixel.
Claim 27
Dependent Claim
91 words
A recording apparatus as claimed in claim 20, characterized in that a plurality of said recording heads, each of which corresponds to each of 3 or 4 colors of an ink fluid for recording, are included, and said plurality of recording elements in each of at least one couple of said plurality of recording heads are shifted relative to each other, and said plurality of dots composed of said 3 or 4 colors of an ink fluid are placed on each of corners of a triangle or rectangle in said pixel.
Claim 28
Dependent Claim
109 words
A recording apparatus as claimed in claim 15, characterized in that a value of at least one of q₁ is different from a value of at least one of q₂, and said second relative movement is taken to be q₂n/h at every said first relative movement, where h is the number of times of said first relative movement, N is the number of said plurality of recording elements, i is an integer 1 or over and less than or equal to (h - 1), q1 is a pitch between in/h-th recording element and in/(h + 1)-th recording element, and q2 is a pitch between recording elements not defining q1.
Claim 29
Dependent Claim
77 words
A recorded product characterized by comprising: a recording medium; and a plurality of dots formed on said recording medium to record an image, wherein said image is composed of a plurality of pixels in each of which one or more than one dots each size of which is slightly different from each other are disposed in positions, at least one position of said positions being different from other positions so that gray-scale of said pixel is established.
Claim 30
Dependent Claim
79 words
A recorded product characterized by comprising: a recording medium; and a plurality of ink droplets deposited on said recording medium to record an image, wherein said image is composed of a plurality of pixels in each of which one or more than one ink droplets each amount of which is slightly different from each other are disposed in positions, at least one position of said positions being different from other positions so that gray-scale of said pixel is established.
Claim 31
Dependent Claim
80 words
A recorded product characterized by comprising: a recording medium; and a plurality of ink droplets deposited on said recording medium to record an image, wherein said image is composed of a plurality of pixels in each of which one or more than one ink droplets each diameter of which is slightly different from each other are disposed in positions, at least one position of said positions being different from other positions so that a gray-scale of said pixel is established.
Claim 32
Dependent Claim
75 words
A recorded product as claimed in claim 30, characterized in that said recording head, as said recording element, having an orifice for ejecting an ink fluid and a thermal energy generation means for generating thermal energy for ejecting an ink fluid from said orifice, generates a bubble by said thermal energy so as to eject the ink fluid accompanied by generation of said bubble so that said dot is formed with said ejected ink fluid.
Claim 33
Dependent Claim
75 words
A recorded product as claimed in claim 31, characterized in that said recording head, as said recording element, having an orifice for ejecting an ink fluid and a thermal energy generation means for generating thermal energy for ejecting an ink fluid from said orifice, generates a bubble by said thermal energy so as to eject the ink fluid accompanied by generation of said bubble so that said dot is formed with said ejected ink fluid.
Claim 34
Dependent Claim
234 words
An ink jet recording method for performing a recording by allowing a relative movement between a recording head which ejects ink droplets from a plurality of orifices arrayed in a predetermined width and a recording medium in a main-scanning direction, said ink jet recording method characterized by comprising the steps of: ejecting ink droplets from a certain orifice of said plurality of orifices, the number of said ink droplets corresponding to a gray level signal, so as to deposit said ink droplets in a pixel during moving said recording head in said main-scanning direction; allowing a relative movement between said recording head and said recording medium by a displacement amount equal to or less than the half of said predetermined width in a sub-scanning direction; ejecting ink droplets from another orifice of said plurality of orifices, the number of said ink droplets corresponding to the gray level signal, so as to deposit said ink droplets in different positions from the positions in which the ink droplets from said certain orifice is deposited in said pixel during moving said recording head in said main-scanning direction; and repeating said step for allowing a relative movement in said sub-scanning direction and said step for ejecting droplets from another orifice so as to project a plurality of ink droplets in a different positions each other on said pixel so that a gray level of said pixel is established.
Claim 35
Dependent Claim
45 words
An ink jet recording apparatus as claimed in claim 34, characterized in that in at least one step of said step for ejecting ink droplets from said certain orifice and said step for ejecting ink droplets from said another orifice, ink droplets are not ejected.
Claim 36
Dependent Claim
70 words
An ink jet recording apparatus as claimed in claim 34, characterized in that in each step of said step for ejecting ink droplets from said certain orifice and said step for ejecting ink droplets from said another orifice, an ink ejection is performed in accordance with a predetermined driving rule for the ink ejection for each gray level so that ejection frequency of each orifice comes to be substantially even.
Claim 37
Independent Claim
35 words
A method of printing grey scale pixels comprising providing a plurality of dots for each pixel, in which the dots are at different positions, the dot positions being such as to reduce irregular print patterns.
Claim 38
Independent Claim
37 words
A method of printing in which a plurality of dots are provided for each pixel to be printed in which the dot positions are selected responsive to recording conditions, materials of the recording medium and so forth.
Claim 39
Dependent Claim
52 words
An ink jet printer comprising means for receiving a pixel pattern and means for converting the pixel pattern into, for each pixel, a plurality of ink jet orifice timing or position control signals, so that each pixel is represented by a plurality of mutually displaced ink ejections to provide grey level variation.
Claim 40
Dependent Claim
57 words
Color recording apparatus comprising a recording head capable of ejecting ink of a plurality of different colors, in which to form a coloured pixel the apparatus is arranged to eject said different color ink to a plurality of corresponding different dot positions on the page so as to reduce mixture of the colors and improve the chromaticity.
References Cited (Backward Citations)
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