Patent ID: 7618108

Claim:
An inkjet recording apparatus, comprising: a recording head which is movable in a main scanning direction, and includes: an ink passage with ink therein; a nozzle in communication with the ink passage; and an actuator for applying energy to the ink in the ink passage to eject the ink in the form of a droplet from the nozzle; a control device which outputs a drive waveform signal while the recording head is moved in the main scanning direction, in order to drive the actuator to eject the ink droplet, the control device including: a temperature detecting portion which detects a temperature of an environment in which the apparatus is situated; and an outputting portion which makes at least one of the following two determinations, with respect to each particular one of dots printed in series at least in the main scanning direction: (a) a first determination whether there is a dot to be printed immediately before the particular dot, and (b) a second determination whether there is a dot to be printed immediately after the particular dot, and which outputs, to the actuator and for the particular dot, (i) a first one of a plurality of kinds of the drive waveform signals, which is for ejecting a first number of the ink droplets, when a result of the determination is affirmative, (ii) a second one of the plurality of kinds of the drive waveform signals, which is for ejecting a second number of the ink droplets, when the result of the determination is negative and the temperature detected by the temperature detecting portion is higher than a threshold, and (iii) a third one of the plurality of kinds of the drive waveform signals which is for ejecting a third number of the ink droplet or droplets, which third number is smaller than the second number, when the result of the determination is negative and the temperature detected by the detecting portion is not higher than the threshold.