Patent ID: 7021158

Claim:
A surface-pressure distribution sensor alternating between an operation mode and a standby mode, comprising: an insulating substrate; unit detection elements disposed on the insulating substrate in a matrix form; a flexible conductive film facing the unit detection elements; drain wires connected to corresponding terminals of the unit detection elements; gate wires connected to corresponding terminals of the unit detection elements; a horizontal scanning circuit selecting the drain wires sequentially; a vertical scanning circuit sending a scanning signal to the gate wires sequentially; a sensor control circuit connected to the horizontal scanning circuit and the vertical scanning circuit; and a sensor actuation signal wire connected to the sensor control circuit, wherein the sensor control circuit is configured to receive a sensor actuation signal through the sensor actuation signal wire and configured to switch off the unit detection elements operational under the operation mode and to switch on the unit detection elements not operational under the standby mode in response to the sensor actuation signal, and the sensor control circuit is configured so that during the standby mode the horizontal and vertical scanning circuits do not receive a clock that is supplied to the horizontal and vertical scanning circuits during the operation mode.