Patent ID: 11860029
Assignee: BEIJING BOE SENSOR TECHNOLOGY CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. The light intensity detection circuit of claim 1, wherein the photoelectric conversion sub-circuit comprises a photodiode; the source follower sub-circuit comprises a second transistor; the reset sub-circuit comprises a third transistor; the light intensity detection circuit further comprises a multiplexing sub-circuit, and the multiplexing sub-circuit comprises a first transistor located inside a pixel unit and a multiplexer located outside the pixel unit, and the sense sub-circuit is an external sense circuit located outside the pixel unit; the read sub-circuit is an external read integrated circuit located outside the pixel unit,
wherein an anode terminal of the photodiode is connected to a bias voltage terminal, and a cathode terminal of the photodiode is connected to the first node;
a control electrode of the second transistor is connected to the first node, a first electrode of the second transistor is connected to a first voltage terminal, and a second electrode of the second transistor is connected to the second node;
a control electrode of the third transistor is connected to a reset control terminal, a first electrode of the third transistor is connected to the offset voltage terminal, and a second electrode of the third transistor is connected to the first node;
a control electrode of the first transistor is connected to a read control terminal, a first electrode of the first transistor is connected to the second node, and a second electrode of the first transistor is connected to an input channel of the multiplexer; and
an output channel of the multiplexer is connected to the read sub-circuit, and the other output channel of the multiplexer is connected to the sense sub-circuit.