Patent ID: 8643635

Claim:
A display device comprising: a display portion; a pixel circuit in the display portion, the pixel circuit including an SRAM circuit; a signal line control circuit; a scanning line control circuit; a first circuit configured to control the pixel circuit; an antenna circuit; a second circuit configured to generate a demodulation signal from a wireless signal received by the antenna circuit; a third circuit configured to rectify the wireless signal received by the antenna circuit; a fourth circuit configured to generate a first voltage from a voltage rectified by the third circuit; a charge circuit configured to store a second voltage from the voltage rectified by the third circuit; a charge control circuit configured to control charging of the second voltage to the charge circuit; a voltage supply control circuit connected to the charge circuit; a fifth circuit configured to control the charge control circuit and the voltage supply control circuit; and a sixth circuit configured to determine whether the first voltage and the second voltage are supplied, compare levels of the first voltage and the second voltage with each other when the first voltage and the second voltage are supplied, and select the higher of the first voltage and the second voltage as a selected voltage, wherein the voltage supply control circuit is configured to supply the second voltage to the sixth circuit, wherein one of the first voltage and the second voltage selected in the sixth circuit is supplied to the signal line control circuit and the scanning line control circuit, and wherein the sixth circuit comprises a storage capacitor and the storage capacitor is configured to compensate voltage supply to the first circuit in a period when voltage is not supplied to the first circuit which occurs when voltage selected in the sixth circuit is supplied to the first circuit.