Patent ID: 8658957
Filing Date: 2014-02-25
Classification: G02F,G06F,G09G,H01L

Abstract:
1. A sensor circuit comprising: a photodetecting element that receives incident light; an accumulation part that is connected to the photodetecting element via an accumulation node and accumulates charges according to an electric current having flown through the photodetecting element; a reset signal line to which a reset signal for initializing a potential of the accumulation node is supplied; a readout signal line to which a readout signal for outputting the potential of the accumulation node is supplied; a sensor switching element that is connected to between the accumulation node and an output line, so as to make the accumulation node and the output line conductive with each other in response to the readout signal, and to output an output signal according to the potential of the accumulation node to the output line; a variable capacitor that is provided between the accumulation node and an input electrode to which a voltage is input, and whose capacitance varies when a pressure is applied; and a control switching element that is connected to the variable capacitor and the accumulation node, and has a control electrode to which a control signal for switching conduction and non-conduction between the variable capacitor and the accumulation node is input.