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

Claim 4:
5. The light intensity detection circuit of claim 1, wherein the sense sub-circuit comprises a fourth transistor located inside a pixel unit and an external sense circuit located outside the pixel unit, wherein the external sense circuit comprises a capacitor and a differential amplifier,
wherein a control electrode of the fourth transistor is connected to a sense control terminal, a first electrode of the fourth transistor is connected to the second node, and a second electrode of the fourth transistor is connected to an end of the capacitor; and
the end of the capacitor is further connected to a negative input terminal of the differential amplifier, and the other end of the capacitor is grounded; a positive input terminal of the differential amplifier is connected to a reference voltage terminal, and an output terminal of the differential amplifier is connected to an sense end.