| CPC H04N 25/709 (2023.01) [H01L 27/14614 (2013.01); H04N 25/745 (2023.01); H04N 25/75 (2023.01)] | 12 Claims |
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1. A light detection element, comprising:
a first light detection unit, comprising a first transistor and a first light sensing unit, wherein the first transistor and the first light sensing unit are electrically connected;
a second light detection unit, electrically connected to the first light detection unit, comprising a second light sensing unit and a second transistor, wherein the second light sensing unit and the second transistor are electrically connected;
a driving transistor, having a gate terminal, wherein the gate terminal is electrically connected to the first light sensing unit and the second light sensing unit,
wherein in a time interval, the first transistor is not turned on and the second transistor is turned on, wherein the first transistor is controlled by a first signal, and the second transistor is controlled by a second signal;
a control circuit, configured to determine whether to allow the second signal to control the second transistor; and
a feedback circuit, configured to determine that a direct light is detected by the light detection element when a voltage at the gate terminal is a third voltage, or configured to determine that a reflected light is detected by the light detection element when a voltage at the gate terminal is a fourth voltage.
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