Patent ID: 8836676

Claim:
A sensing circuit comprising: a sensor array having a plurality of sensors are simultaneously charged by a sensing signal corresponding to an external light in response to a driving signal during a first time period and discharged in response to respective switching signals during a second time period after the first time period in response to a control signal; a first controller which provides the driving signal to the sensor array; and a second controller which provides the switching signals to the sensor array, wherein each of the sensors comprises, a light receiving part which outputs the sensing signal corresponding to the external light in response to the driving signal received during a frame time period which includes the first time period and the second time period; a charging part which charges the sensing signal; a charging control part connecting between the light receiving part and the charging part and which is turned on during the first time period and turned off during the second time period in response to the control signal; and a switching part connected to the charging part and which reads out the sensing signal charged at the charging part during the second time period of the frame time period.