Patent ID: 8322809

Claim:
A recording head comprising: a plurality of recording elements grouped into a first plural number of groups, wherein the recording elements included in the groups are assigned to a second plural number of different timings for driving the recording elements; driving units configured to drive the recording elements included in the groups at the second plural number of different timings; an input unit configured to receive an enable signal that defines a period during which the driving of the recording elements is enabled at one ink ejection, wherein the enable signal is combined with pulses during the period based on the first plural number; a determining unit configured to detect the pulses during the period defined by the enable signal and determine a start timing and an end timing of a control signal based on a result of detection, wherein the control signal allows the driving units to drive the recording elements in the group; and a generating unit configured to generate the control signal based on the start timing and the end timing.