Patent ID: 8704812
Filing Date: 2014-04-22
Classification: G01J,G06F

Abstract:
1. A method of controlling a light sensing circuit, the method comprising: sensing light incident on a photodiode; generating current corresponding to a brightness of the sensed light; amplifying the current using a driving transistor; outputting the amplified current using a switching transistor; sensing an ambient temperature; and controlling a time period during which light is sensed by the photodiode by controlling the timing at which the switching transistor turns on without changing a length of time during which the switching transistor turns on, or controlling a time period during which the amplified current is output by controlling the length of time during which the switching transistor turns on, according to the sensed ambient temperature, wherein the switching transistor is turned on either earlier or later to control the length of time during which the switching transistor turns on according to the sensed ambient temperature.