Patent ID: 8723096

Claim:
An active photosensing pixel, comprising: a two-terminal photosensing transistor, having a first terminal coupled to a first node, a second terminal coupled to a first selection line and a control terminal connected to the second terminal; a driving transistor, having a first terminal coupled to a first reference voltage, a second terminal coupled to an output line and a control terminal connected to the first node; and a reset transistor, having a first terminal connected to the first node, a second terminal coupled to a second reference voltage and a control terminal coupled to a second selection line, wherein, during an exposure and readout cycle, a level of the first selection line is pulled up to be higher than that of the first node and the level of the second selection line is maintained at a low driving voltage, and the two-terminal photosensing transistor is served as a diode to produce a diode current according to an incident light, wherein the first node is charged by the diode current, such that the driving transistor generates an output current to the output line.