| 发明名称 | Liquid discharging apparatus, head unit, capacitive load driving circuit, and control method of capacitive load driving circuit | ||
| 摘要 | A liquid discharging apparatus includes a modulation portion that generates a modulation signal obtained by pulse-modulating a source signal; a switching element that generates an amplification modulation signal obtained by amplifying the modulation signal; a low-pass filter that generates a driving signal by demodulating the amplification modulation signal; a piezoelectric element that is displaced by applying the driving signal; a selection portion that is configured to include a transistor and selects whether or not the driving signal is applied to the piezoelectric element; and a detection portion that detects lowering of a power source voltage supplied to the selection portion. The detection portion performs control for lowering a voltage of the driving signal if lowering of the power source voltage is detected. | ||
| 申请公布号 | US9555624(B2) | 申请公布日期 | 2017.01.31 |
| 申请号 | US201615000130 | 申请日期 | 2016.01.19 |
| 申请人 | Seiko Epson Corporation | 发明人 | Sano Takafumi |
| 分类号 | B41J2/045 | 主分类号 | B41J2/045 |
| 代理机构 | Harness, Dickey & Pierce, P.L.C. | 代理人 | Harness, Dickey & Pierce, P.L.C. |
| 主权项 | 1. A liquid discharging apparatus comprising: a modulation portion that generates a modulation signal obtained by pulse-modulating a source signal; a switching element that generates an amplification modulation signal obtained by amplifying the modulation signal; a low-pass filter that generates a driving signal by demodulating the amplification modulation signal; a piezoelectric element that is displaced by applying the driving signal; a selection portion that is configured to include a transistor and selects whether or not the driving signal is applied to the piezoelectric element; a detection portion that detects lowering of a power source voltage supplied to the selection portion; a cavity of which an inside is filled with a liquid and an internal volume is changed by displacement of the piezoelectric element; and a nozzle that communicates with the cavity and discharges the liquid on the inside of the cavity as liquid droplets in accordance with the change in the internal volume of the cavity, wherein the detection portion performs control for lowering a voltage of the driving signal if lowering of the power source voltage is detected. | ||
| 地址 | JP | ||