Patent ID: 9056456
Filing Date: 2015-06-16
Classification: B41J

Abstract:
1. A recording apparatus that records an image, comprising: a recording head including at least first, second, and third discharge port arrays each having a plurality of discharge ports for discharging inks having the same color arranged in a predetermined direction, the first, second, and third discharge port arrays being displaced from one another in the predetermined direction so that N number of first discharge ports arranged at an end on the first side in the predetermined direction of the first discharge port array and N number of second discharge ports arranged at an end on the second side opposite to the first side in the predetermined direction of the second discharge port array are arranged in a direction intersecting the predetermined direction to form a first overlap portion for discharging the inks to the same area on a recording medium, and N number of third discharge ports arranged at an end on the first side in the predetermined direction of the second discharge port array and N number of fourth discharge ports arranged at an end on the second side in the predetermined direction of the third discharge port array are arranged in the intersecting direction to form a second overlap portion for discharging the inks to the same area on the recording medium; and a control unit configured to performs control to discharge the inks to the recording medium from the recording head according to recording ratios respectively determined for the N number of first discharge ports, the N number of second discharge ports, the N number of third discharge ports, and the N number of fourth discharge ports while relatively scanning in the intersecting direction of the recording head and the recording medium, wherein the control unit controls the discharge of the inks in each of pixel columns including a plurality of pixels arranged in the predetermined direction on the recording medium so that (i) the inks are not discharged, among the N number of first discharge ports, from M (0≦M≦N) number of discharge ports on the first side in the predetermined direction and are discharged according to the first recording ratio from L (0≦L≦N−M) number of discharge ports on the second side in the predetermined direction, (ii) the inks are not discharged, among the N number of second discharge ports, from the L number of discharge ports on the second side in the predetermined direction and are discharged according to the first recording ratio from the M number of discharge ports on the first side in the predetermined direction, (iii) the inks are not discharged, among the N number of third discharge ports, from K (0≦K≦N) number of discharge ports on the first side in the predetermined direction and are discharged according to the second recording ratio from J (0≦J≦N−K) number of discharge ports on the second side in the predetermined direction, and (iv) the inks are not discharged, among the N number of fourth discharge ports, from the J number of discharge ports on the second side in the predetermined direction and are discharged according to the second recording ratio from the K number of discharge ports on the first side in the predetermined direction, and wherein respective values in at least one of a first set of the M and the K and a second set of the L and the J continuously increase or decrease as a position of the pixel column in the intersecting direction on the recording medium changes, and the respective values differ from each other when the position of the pixel column in the intersecting direction on the recording medium is a predetermined position.