| 摘要 |
The printing apparatus includes a reference drive signal generation section that generates a reference drive signal, a signal modulation section that modulates the reference drive signal to generate a modulation reference drive signal, a signal amplification section that amplifies the modulation reference drive signal using switching elements to generate a modulation drive signal, a signal conversion section that converts the modulation drive signal to a drive signal, a piezoelectric element that deforms in response to the drive signal, a pressure chamber that expands or contracts due to the deformation of the piezoelectric element, a nozzle opening portion that communicates with the pressure chamber, and a frequency control section which limits a switching frequency to be less than a predetermined value in a case where a product of the printing resolution and the printing speed is equal to or larger than a threshold value. |
