Patent ID: 9186888
Filing Date: 2015-11-17
Classification: B41J

Abstract:
1. A liquid discharging apparatus comprising: an original drive signal generation unit that generates an original drive signal; a signal modulation unit that modulates the original drive signal to generate a modulation signal; a first signal amplifying unit that amplifies the modulation signal to generate a first amplified modulation signal; a second signal amplifying unit that amplifies the modulation signal to generate a second amplified modulation signal; an amplification control unit that controls operations of the first signal amplifying unit and the second signal amplifying unit; a signal conversion unit that converts the first amplified modulation signal and the second amplified modulation signal into a drive signal, wherein the signal conversion unit includes a first signal conversion unit and a second signal conversion unit, the drive signal includes a first drive signal and a second drive signal, the first signal conversion unit converts the first amplified modulation signal into the first drive signal, and the second signal conversion unit converts the second amplified modulation signal into the second drive signal; a first piezoelectric element that is deformed by the first drive signal; a first cavity that expands or contracts in accordance with the deformation of the first piezoelectric element; a first nozzle that communicates with the first cavity and discharges liquid in accordance with an increase or a decrease in pressure in the first cavity; a second piezoelectric element that is deformed by the second drive signal; a second cavity that expands or contracts in accordance with the deformation of the second piezoelectric element; a second nozzle that communicates with the second cavity and discharges the liquid in accordance with an increase or a decrease in pressure in the second cavity; a third piezoelectric element that is deformed by the first drive signal; a third cavity that expands or contracts in accordance with the deformation of the third piezoelectric element; and a third nozzle that communicates with the third cavity and discharges the liquid in accordance with an increase or a decrease in pressure in the third cavity, wherein the first nozzle is provided at one end of a nozzle array, the third nozzle is provided at the other end of the nozzle array, and the second nozzle is provided at a center of the nozzle array between the first nozzle and the second nozzle.