Ink jet recording method and apparatus using time-shared interlaced recording

An ink jet recording method comprising:

• providing a recording head having a plurality of ink ejecting nozzles each having an ink ejection outlet, with the plurality of nozzles grouped into a number (i) of blocks of nozzles;
• supplying driving signals in a time-shared manner to the nozzles in each nozzle block, wherein each driving signal is variable and comprises, for each one ejection of the ink, a first signal period P1 for heating the ink, a second signal period P3 for generating a bubble for ejecting the ink using heat, and a rest period P2 therebetween, for each driving of the nozzle blocks,
• wherein a first signal period P1 of a second block of nozzles is in a rest period P2 of a first block of nozzles after a first signal period P1 of the first block, a second signal period P3 of the first block is in a rest period P2 of a third block of nozzles, and these operations are repeated up to an i-th numbered block, and even if the driving signals are varied, P2>P1+P3 is satisfied.

An ink jet recording apparatus comprising:

• a recording head having at least a first group of ejection parts and a second group of ejection parts, the first group and the second group being independently drivable;
• and
• driving signal supplying means for supplying driving signals to the first group and to the second group, in a time-shared manner, each driving signal is variable and comprising, for each one ejection of the ink, at least a first signal period P1 for heating ink, a second signal period P2 for generating a bubble for ejecting the ink using heat, and a rest period P3 therebetween, to effect each one ejection of the ink, wherein the first signal period of the driving signal for the second group is in a rest period of the driving signal for the first group, and even if the driving signals are varied, P2>P1+P3 is satisfied.

An ink jet recording apparatus comprising:

• a recording head having at least a first group of ejection parts and a second group of ejection parts, the first group and the second group being independently drivable;
• and
• driving signal supplying means for supplying a first driving signal to the first group and a second driving signal to the second group, in a time-shared manner, the first and the second driving signals each comprising, for each one ejection of the ink, at least a first signal period for heating the ink, a second signal period for generating a bubble for ejecting the ink using heat and a rest period therebetween, wherein the second signal period of the second driving signal for the second group and a first signal period of a subsequent second driving signal are in a rest period of a subsequent first driving signal for the first group, and the second signal period of the first driving signal for the first group and a first signal period of a subsequent first driving signal are in the rest period of the second driving signal for the second group.