Patent ID: 7530654

Claim:
A liquid ejection apparatus comprising: a head having a plurality of nozzles each for ejecting a liquid droplet, and a plurality of elements each provided in correspondence with a respective one of the nozzles; a drive signal generation section that generates a first drive signal including a plurality of waveform sections, and a second drive signal that is different from the first drive signal and that includes a plurality of waveform sections; and a controlling section that drives the element to cause the liquid droplet to be ejected from the nozzle, by selecting one of the first drive signal and the second drive signal, further selecting a predetermined waveform section from among the plurality of waveform sections included in the drive signal that has been selected, and applying, to the element, the predetermined waveform section that has been selected, wherein the controlling section comprises: a first switch for controlling application of the waveform section included in the first drive signal to the element, a second switch for controlling application of the waveform section included in the second drive signal to the element, a memory that stores drive signal selection data for selecting one drive signal of the first drive signal and the second drive signal, waveform section selection data for selecting the waveform section from the drive signal that has been selected, and a first AND gate and a second AND gate, the first AND gate and the second AND gate each having input therein a signal according to the waveform section selection data, one of the first AND gate and the second AND gate having input therein a signal according to the drive signal selection data, and the other of the first AND gate and the second AND gate having input therein an inverted signal of the signal according to the drive signal selection data, wherein the controlling section, by controlling the first switch with the use of an output of the first AND gate and controlling the second switch with the use of an output of the second AND gate, puts one switch, of the first switch and the second switch corresponding to the drive signal, that is not selected in an OFF state based on the drive signal selection data, when the first switch is in the OFF state based on the drive signal selection data, the second switch is controlled based on the waveform section selection data, and when the second switch is in the OFF state based on the drive signal selection data, the first switch is controlled based on the waveform section selection data.