Patent ID: 10964282

Abstract:
A power supply circuit includes a voltage boosting circuit for boosting a supplied first power supply voltage to a second power supply voltage used in a drive circuit of a display device, a capacitor provided between a power supply wiring for outputting the second power supply voltage and a ground, a logic circuit for outputting a high-level signal when the first power supply voltage and a supplied first control signal are at a high level, a delay circuit for outputting a signal obtained by delaying an output signal of the logic circuit as a second control signal used for an operation control of the drive circuit, and a resistor provided between an input terminal of the delay circuit and the ground. The power supply circuit may include a first diode on the power supply wiring, or may include a second diode having an anode terminal connected to an output terminal of the second control signal and a cathode terminal connected to the input terminal of the delay circuit.