Patent ID: 9697766
Date: 2017-07-04
CPC Classifications: G09G

Claim:
1. A comparator unit comprising: comparison circuitry configured to compare a control pulse with an electric potential based on a signal voltage; and control circuitry configured to control, based on the control pulse, operation and non-operation of the comparison circuitry, wherein the comparison circuitry includes a signal writing transistor configured to receive the signal voltage, an inverter circuit, and a capacitor configured to include an input point and an output point, and compares a voltage of the output point with a predetermined voltage, the control circuitry is configured to receive the control pulse, and to perform ON-OFF operation based on a signal of a phase opposite to a phase of a signal used by the signal writing transistor, and the capacitor is configured to retain, based on operation of the signal writing transistor, the electric potential based on the signal voltage, the input point being connected to the signal writing transistor and the control-pulse transistor, and the output point being connected to the inverter circuit.