Patent ID: 7270389

Claim:
An ink jet recording apparatus comprising: a plurality of heater elements for heating ink upon driving the heater elements to eject the ink; control means for controlling driving of the same heater elements for recording by providing a pulse different from a preceding pulse for each ejection operation, independently of image data; and ink-amount averaging means arranged to select pulses to be used by said control means so that the average of ink amounts based on the pulses becomes a predetermined ink amount, wherein said control means controls the driving by using the pulses selected through said ink-amount averaging means, wherein said ink-amount averaging means is arranged to select the pulses based on a ratio of Pw 1 :Pw 2 =α:(1−α) by which ratio Vdref=α·Vd 1 +(1−α)·Vd 2 is valid, where Pw 1 is a driving pulse by which an ink amount Vd 1 less than a predetermined ink amount Vdref is ejected, and Pw 2 is a driving pulse by which an ink amount Vd 1 exceeding the predetermined ink amount is ejected, wherein α is a variable from 0 to 1.