Patent ID: 9597869
Date: 2017-03-21
CPC Classifications: B41J

Claim:
1. A liquid discharge apparatus comprising: a first head that is driven by a first drive signal and a second drive signal and that is capable of discharging a liquid; a second head that is driven by a third drive signal and a fourth drive signal and that is capable of discharging a liquid; a circuit substrate; a first generator that is provided on the circuit substrate and that generates the first drive signal; a second generator that is provided on the circuit substrate and that generates the second drive signal; a third generator that is provided on the circuit substrate and that generates the third drive signal; and a fourth generator that is provided on the circuit substrate and that generates the fourth drive signal, wherein: the first generator includes a first modulator that generates a first modulated signal by pulse-modulating a first definition signal that defines a waveform of the first drive signal, a first amplifier that includes a first transistor and that generates a first amplified signal by amplifying the first modulated signal by using the first transistor, and a first smoother that generates the first drive signal by smoothing the first amplified signal; the second generator includes a second modulator that generates a second modulated signal by pulse-modulating a second definition signal that defines a waveform of the second drive signal, a second amplifier that includes a second transistor and that generates a second amplified signal by amplifying the second modulated signal by using the second transistor, and a second smoother that generates the second drive signal by smoothing the second amplified signal; the third generator includes a third modulator that generates a third modulated signal by pulse-modulating a third definition signal that defines a waveform of the third drive signal, a third amplifier that includes a third transistor and that generates a third amplified signal by amplifying the third modulated signal by using the third transistor, and a third smoother that generates the third drive signal by smoothing the third amplified signal; the fourth generator includes a fourth modulator that generates a fourth modulated signal by pulse-modulating a fourth definition signal that defines a waveform of the fourth drive signal, a fourth amplifier that includes a fourth transistor and that generates a fourth amplified signal by amplifying the fourth modulated signal by using the fourth transistor, and a fourth smoother that generates the fourth drive signal by smoothing the fourth amplified signal; an amount of heat that the first transistor produces when generating the first amplified signal is larger than an amount of heat that the second transistor produces when generating the second amplified signal; an amount of heat that the third transistor produces when generating the third amplified signal is larger than an amount of heat that the fourth transistor produces when generating the fourth amplified signal; and distance between the first transistor and the third transistor is longer than at least one of distance between the first transistor and the second transistor and distance between the first transistor and the fourth transistor.