RECORDING APPARATUS AND RECORDING METHOD

• US 20170120642A1
• Filed: 10/25/2016
• Published: 05/04/2017
• Est. Priority Date: 10/30/2015
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Yamagata, Mayuko, Seki, Satoshi, Tanaka, Hirokazu, Sasaki, Gou, Doi, Tsukasa, Suzuki, Fumiko, Takahashi, Kiichiro
• Granted Patent: US 9,962,950 B2
• Time in Patent Office: Days
• CPC Class Codes: B41J 19/145 Dot misalignment correction
• CPC Class Codes: B41J 2/2125 by means of nozzle diameter selection
• CPC Class Codes: B41J 2/2132 Print quality control characterised by dot disposition, e.g. for reducing white stripes or banding methods for local corrections by dot omission, image edge enhancement, or multi-pass mask selection G06K15/102; colour conversion H04N1/40

Abstract

Driving orders of driving blocks are controlled with regard to each of multiple types of ink so that landing positions of ink from the driving blocks differ in multiple scans, and in the mask patterns used, there is a relatively small number of superimposed pixels among pixels regarding which a large number of discharge permitted has been stipulated regarding a mask pattern corresponding to one type of ink and one scan and pixels regarding which a large number of discharge permitted has been stipulated regarding a mask pattern corresponding to another type of ink and the one scan.

Claims

1. A recording apparatus comprising:

a recording head including

a first recording element row where a plurality of recording elements configured to generate energy to discharge a first type of ink are arrayed in a predetermined direction, and

a second recording element row where a plurality of recording elements configured to generate energy to discharge a second type of ink, that is different from the first type of ink, are arrayed in the predetermined direction;

a scanning unit configured to execute

a first scan of the recording head over a unit region on a recording medium, K (K≧

1) times in a first direction following an intersecting direction intersecting the predetermined direction, and

a second scan of the recording head over the unit region, L (L≧

1) times in a second direction opposite to the first direction;

a first generating unit configured to generate K+L sets of first recording data stipulating discharge or non-discharge of the first type of ink, as to each of a plurality of pixels, corresponding to the K+L scans by the scanning unit, based on first image data that corresponds to an image to be recorded in the unit region and stipulates a plurality of combinations of number of times of discharge of the first type of ink to each of the plurality of pixel regions, and K+L first mask patterns corresponding to the K+L scans by the scanning unit and stipulating a plurality of combinations of number of times of discharge of the first type ink to each of the plurality of pixel regions;

a second generating unit configured to generate K+L sets of second recording data stipulating discharge or non-discharge of the second type of ink, as to each of a plurality of pixels, corresponding to the K+L scans by the scanning unit, based on second image data that corresponds to an image to be recorded in the unit region and stipulates a plurality of combinations of number of times of discharge of the second type of ink to each of the plurality of pixel regions, and K+L second mask patterns corresponding to the K+L scans by the scanning unit and stipulating a plurality of combinations of number of times of discharge of the second type ink to each of the plurality of pixel regions;

a driving unit configured to

drive a plurality of first recording elements corresponding to the unit region the K first scans within the first and second recording element rows, at a first driving order, and

drive a plurality of second recording elements corresponding to the unit region the L second scans within the first and second recording element rows, at a second driving order that is different from the opposite order from the first driving order; and

a control unit configured to effect control to discharge the first and second types of ink to a plurality of pixel regions equivalent to the plurality of pixels within the unit region by driving the plurality of recording elements within the first and second recording element rows, based on the K+L sets of first and second recording data, in the K+L scans by the scanning unit,

wherein

(i) an array of pixels regarding which an M (M≧

1) number of ink discharge permitted is stipulated by one of the K first mask patterns corresponding to the K first scans, and an array of pixels regarding which an N (N>

M) number of ink discharge permitted is stipulated by one of the L first mask patterns corresponding to the L second scans, correspond to each other,

(ii) an array of pixels regarding which an M number of ink discharge permitted is stipulated by one of the K second mask patterns corresponding to the K first scans, and an array of pixels regarding which an N number of ink discharge permitted is stipulated by one of the L second mask patterns corresponding to the L second scans, correspond to each other, and

(iii) an array of pixels regarding which an N number of ink discharge permitted is stipulated by one of the K first mask patterns corresponding to the K first scans, and an array of pixels regarding which an N number of ink discharge permitted is stipulated by one of the K second mask patterns corresponding to the K first scans, are different from each other.

2. The recording apparatus according to claim 1,

wherein the second driving order is different from an opposite order of the first driving order that has been offset.

3. The recording apparatus according to claim 2,

wherein the second driving order is the same driving order as the first driving order.

4. The recording apparatus according to claim 1,

wherein an array of pixels regarding which an M number of ink discharge permitted is stipulated by one of the K first mask patterns corresponding to the K first scans, and an array of pixels regarding which an M number of ink discharge permitted is stipulated by one of the K second mask patterns corresponding to the K first scans, are different from each other.

5. The recording apparatus according to claim 1,

wherein an array of pixels regarding which an N number of ink discharge permitted is stipulated by one of the K first mask patterns corresponding to the K first scans, and an array of pixels regarding which an N number of ink discharge permitted is stipulated by one of the K second mask patterns corresponding to the K first scans, are not superimposed on each other.

6. The recording apparatus according to claim 1,

wherein an array of pixels regarding which an M number of ink discharge permitted is stipulated by one of the K first mask patterns corresponding to the K first scans, and an array of pixels regarding which an N number of ink discharge permitted is stipulated by one of the L second mask patterns corresponding to the L second scans, are different from each other.

7. The recording apparatus according to claim 1,

wherein an array of pixels regarding which an N number of ink discharge permitted is stipulated by one of the K first mask patterns corresponding to the K first scans, and an array of pixels regarding which an M number of ink discharge permitted is stipulated by one of the L second mask patterns corresponding to the L second scans, correspond each other.

8. The recording apparatus according to claim 1,

wherein, of the pixels regarding which an N number of ink discharge permitted is stipulated by one of the L first mask patterns corresponding to the L times of second scans, the number of pixels adjacent on both sides in the intersecting direction to pixels regarding which an N number of ink discharge permitted is stipulated by one of the K first mask patterns corresponding to the K times of first scans, is larger than the number of pixels not adjacent on both sides in the intersecting direction to pixels regarding which an N number of ink discharge permitted is stipulated by one of the K first mask patterns corresponding to the K times of first scans.

9. The recording apparatus according to claim 1,

wherein pixels, regarding which an N number of ink discharge permitted is stipulated by one of the K first mask patterns corresponding to the K times of first scans, have an N number of ink discharge permitted stipulated by one first mask pattern of the K first mask patterns, and have zero ink discharge permitted stipulated by the other K−

1 first mask pattern of the K first mask patterns.

10. The recording apparatus according to claim 1,

wherein pixels, regarding which an M number of ink discharge permitted is stipulated by one of the K first mask patterns corresponding to the K times of first scans, have an M number of ink discharge permitted stipulated by one first mask pattern of the K first mask patterns, and have zero ink discharge permitted stipulated by the other K−

1 first mask pattern of the K first mask patterns.

11. The recording apparatus according to claim 1, further comprising:

a conveying unit configured to convey the recording medium in the predetermined direction, between consecutive scans if the K+L scans by the scanning unit,

wherein the plurality of first recording elements and the plurality of second recording elements are positioned at different positions in the predetermined direction.

12. The recording apparatus according to claim 1,

wherein the scanning unit alternately performs the first scan and the second scan as to the unit region.

13. The recording apparatus according to claim 1,

wherein M=1 and N=2.

14. The recording apparatus according to claim 1,

wherein K=L.

15. The recording apparatus according to claim 1,

wherein the first type of ink is ink of a first color,

and wherein the second type of ink is ink of a second color that is different from the first color.

16. The recording apparatus according to claim 1,

wherein the first type of ink is ink of a first dot size,

and wherein the second type of ink is ink of a second dot size that is different from the first dot size.

17. A recording apparatus comprising:

a recording head including

a first recording element row where a plurality of recording elements configured to generate energy to discharge a first type of ink are arrayed in a predetermined direction, and

a second recording element row where a plurality of recording elements configured to generate energy to discharge a second type of ink, that is different from the first type of ink, are arrayed in the predetermined direction;

a scanning unit configured to execute

a first scan of the recording head over a unit region on a recording medium, K (K≧

1) times in a first direction following an intersecting direction intersecting the predetermined direction, and

a second scan of the recording head over the unit region, L (L≧

1) times in the first direction;

a first generating unit configured to generate K+L sets of first recording data stipulating discharge or non-discharge of the first type of ink, as to each of a plurality of pixels, corresponding to the K+L scans by the scanning unit, based on first image data that corresponds to an image to be recorded in the unit region and stipulates a plurality of combinations of number of times of discharge of the first type of ink to each of the plurality of pixel regions, and K+L first mask patterns corresponding to the K+L scans by the scanning unit and stipulating a plurality of combinations of number of times of discharge of the first type ink to each of the plurality of pixel regions;

a second generating unit configured to generate K+L sets of second recording data stipulating discharge or non-discharge of the second type of ink, as to each of a plurality of pixels, corresponding to the K+L scans by the scanning unit, based on second image data that corresponds to an image to be recorded in the unit region and stipulates a plurality of combinations of number of times of discharge of the second type of ink to each of the plurality of pixel regions, and K+L second mask patterns corresponding to the K+L scans by the scanning unit and stipulating a plurality of combinations of number of times of discharge of the second type ink to each of the plurality of pixel regions;

a driving unit configured to

drive a plurality of first recording elements corresponding to the unit region the K first scans within the first and second recording element rows, at a first driving order, and

drive a plurality of second recording elements corresponding to the unit region the L second scans within the first and second recording element rows, at a second driving order that is different from the opposite order from the first driving order; and

a control unit configured to effect control to discharge the first and second types of ink to a plurality of pixel regions equivalent to the plurality of pixels within the unit region by driving the plurality of recording elements within the first and second recording element rows, based on the K+L sets of first and second recording data, in the K+L scans by the scanning unit,

wherein

(i) an array of pixels regarding which an N (N≧

1) number of ink discharge permitted is stipulated by one of the K first mask patterns corresponding to the K first scans, and an array of pixels regarding which an M (M>

N) number of ink discharge permitted is stipulated by one of the L first mask patterns corresponding to the L second scans, correspond to each other,

(ii) an array of pixels regarding which an M number of ink discharge permitted is stipulated by one of the K second mask patterns corresponding to the K first scans, and an array of pixels regarding which an N number of ink discharge permitted is stipulated by one of the L second mask patterns corresponding to the L second scans, correspond to each other, and

(iii) an array of pixels regarding which an N number of ink discharge permitted is stipulated by one of the K first mask patterns corresponding to the K first scans, and an array of pixels regarding which an N number of ink discharge permitted is stipulated by one of the K second mask patterns corresponding to the K first scans, are different from each other.

18. The recording apparatus according to claim 17,

wherein the second driving order is different from an order where the first driving order has been offset.

19. The recording apparatus according to claim 18,

wherein the second driving order is an opposite order from the first driving order.

20. A recording method of performing recording using a recording head including a first recording element row where a plurality of recording elements configured to generate energy to discharge a first type of ink are arrayed in a predetermined direction, and a second recording element row where a plurality of recording elements configured to generate energy to discharge a second type of ink, that is different from the first type of ink, are arrayed in the predetermined direction, the method comprising:

executing scanning of

a first scan of the recording head over a unit region on a recording medium, K (K≧

1) times in a first direction following an intersecting direction intersecting the predetermined direction, and

a second scan of the recording head over the unit region, L (L≧

1) times in a second direction opposite to the first direction;

first generating of K+L sets of first recording data stipulating discharge or non-discharge of the first type of ink, as to each of a plurality of pixels, corresponding to the K+L scans in the scanning, based on first image data that corresponds to an image to be recorded in the unit region and stipulates a plurality of combinations of number of times of discharge of the first type of ink to each of the plurality of pixel regions, and K+L first mask patterns corresponding to the K+L scans in the scanning and stipulating a plurality of combinations of number of times of discharge of the first type ink to each of the plurality of pixel regions;

second generating of K+L sets of second recording data stipulating discharge or non-discharge of the second type of ink, as to each of a plurality of pixels, corresponding to the K+L scans in the scanning, based on second image data that corresponds to an image to be recorded in the unit region and stipulates a plurality of combinations of number of times of discharge of the second type of ink to each of the plurality of pixel regions, and K+L second mask patterns corresponding to the K+L scans in the scanning and stipulating a plurality of combinations of number of times of discharge of the second type ink to each of the plurality of pixel regions;

driving of

a plurality of first recording elements corresponding to the unit region the K first scans within the first and second recording element rows, at a first driving order, and

a plurality of second recording elements corresponding to the unit region the L second scans within the first and second recording element rows, at a second driving order that is different from the opposite order from the first driving order; and

effecting control to discharge the first and second types of ink to a plurality of pixel regions equivalent to the plurality of pixels within the unit region by driving, in the driving, the plurality of recording elements within the first and second recording element rows, based on the K+L sets of first and second recording data generated in the first and second generating, in the K+L scans in the scanning,

wherein

(i) an array of pixels regarding which an M (M≧

1) number of ink discharge permitted is stipulated by one of the K first mask patterns corresponding to the K first scans, and an array of pixels regarding which an N (N>

M) number of ink discharge permitted is stipulated by one of the L first mask patterns corresponding to the L second scans, correspond to each other,

(ii) an array of pixels regarding which an M number of ink discharge permitted is stipulated by one of the K second mask patterns corresponding to the K first scans, and an array of pixels regarding which an N number of ink discharge permitted is stipulated by one of the L second mask patterns corresponding to the L second scans, correspond to each other, and

(iii) an array of pixels regarding which an N number of ink discharge permitted is stipulated by one of the K first mask patterns corresponding to the K first scans, and an array of pixels regarding which an N number of ink discharge permitted is stipulated by one of the K second mask patterns corresponding to the K first scans, are different from each other.

21. A recording method of performing recording using a recording head including a first recording element row where a plurality of recording elements configured to generate energy to discharge a first type of ink are arrayed in a predetermined direction, and a second recording element row where a plurality of recording elements configured to generate energy to discharge a second type of ink, that is different from the first type of ink, are arrayed in the predetermined direction, the method comprising:

executing scanning of

a first scan of the recording head over a unit region on a recording medium, K (K≧

1) times in a first direction following an intersecting direction intersecting the predetermined direction, and

a second scan of the recording head over the unit region, L (L≧

1) times in the first direction;

first generating of K+L sets of first recording data stipulating discharge or non-discharge of the first type of ink, as to each of a plurality of pixels, corresponding to the K+L scans in the scanning, based on first image data that corresponds to an image to be recorded in the unit region and stipulates a plurality of combinations of number of times of discharge of the first type of ink to each of the plurality of pixel regions, and K+L first mask patterns corresponding to the K+L scans in the scanning and stipulating a plurality of combinations of number of times of discharge of the first type ink to each of the plurality of pixel regions;

second generating of K+L sets of second recording data stipulating discharge or non-discharge of the second type of ink, as to each of a plurality of pixels, corresponding to the K+L scans in the scanning, based on second image data that corresponds to an image to be recorded in the unit region and stipulates a plurality of combinations of number of times of discharge of the second type of ink to each of the plurality of pixel regions, and K+L second mask patterns corresponding to the K+L scans in the scanning and stipulating a plurality of combinations of number of times of discharge of the second type ink to each of the plurality of pixel regions;

driving of

a plurality of first recording elements corresponding to the unit region the K first scans within the first and second recording element rows, at a first driving order, and

a plurality of second recording elements corresponding to the unit region the L second scans within the first and second recording element rows, at a second driving order that is different from the opposite order from the first driving order; and

effecting control to discharge the first and second types of ink to a plurality of pixel regions equivalent to the plurality of pixels within the unit region by driving, in the driving, the plurality of recording elements within the first and second recording element rows, based on the K+L sets of first and second recording data generated in the first and second generating, in the K+L scans in the scanning,

wherein

(i) an array of pixels regarding which an N (N≧

1) number of ink discharge permitted is stipulated by one of the K first mask patterns corresponding to the K first scans, and an array of pixels regarding which an M (M>

N) number of ink discharge permitted is stipulated by one of the L first mask patterns corresponding to the L second scans, correspond to each other,

(ii) an array of pixels regarding which an M number of ink discharge permitted is stipulated by one of the K second mask patterns corresponding to the K first scans, and an array of pixels regarding which an N number of ink discharge permitted is stipulated by one of the L second mask patterns corresponding to the L second scans, correspond to each other, and

(iii) an array of pixels regarding which an N number of ink discharge permitted is stipulated by one of the K first mask patterns corresponding to the K first scans, and an array of pixels regarding which an N number of ink discharge permitted is stipulated by one of the K second mask patterns corresponding to the K first scans, are different from each other.