JP2008284849A5 - - Google Patents

Claims (5)

(A) an element that operates to discharge liquid from the nozzle;
(B) a first drive signal generator for generating a first drive signal including a first drive pulse for operating the element,
(B1) a first digital-analog converter that outputs a first analog signal obtained by analog-converting first digital data;
(B2) a current amplification circuit that amplifies the current of the first analog signal;
(B3) a first drive signal generation unit that outputs the first analog signal that has been amplified through the current amplifier circuit as the first drive signal;
(C) Second drive for generating a second drive signal including a second drive pulse for operating the element, the second drive pulse having a voltage amplitude smaller than that of the voltage in the first drive pulse. A signal generator,
(C1) having a second digital-to-analog converter that outputs a second analog signal obtained by analog-converting the second digital data;
(C2) a second drive signal generation unit that outputs the second analog signal as the second drive signal without passing through a current amplifier circuit;
A liquid ejection apparatus having (D). The liquid ejection device according to claim 1,
The first digital-analog converter includes:
A first digital-analog conversion circuit that generates a first pre-amplification analog signal having a voltage lower than that of the first analog signal by performing analog conversion on the first digital data;
A liquid ejecting apparatus comprising: a first voltage amplification circuit configured to generate the first analog signal by performing voltage amplification of the first analog signal before amplification. A liquid ejection apparatus according to any one of claims 1 to 2 ,
A liquid ejection apparatus comprising: an application control unit that selects a necessary pulse from the first drive pulse and the second drive pulse according to a liquid ejection amount and applies the selected pulse to the element. The liquid ejection device according to claim 3 ,
The second drive pulse is
A thickening suppression pulse applied to the element when suppressing the liquid thickening;
The application control unit includes:
A liquid ejection device that applies the thickening suppression pulse to a corresponding element based on a command not to eject liquid. The liquid ejection device according to claim 4 ,
The second drive signal is:
Having a plurality of said thickening suppression pulses,
The application control unit includes:
A liquid ejection apparatus that selects a specific thickening suppression pulse from the plurality of thickening suppression pulses based on a command not to eject liquid, and applies the selected thickening suppression pulse to a corresponding element.