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

Claim 0:
1. A light intensity detection circuit, comprising:
a photoelectric conversion sub-circuit, a source follower sub-circuit, a reset sub-circuit, a read sub-circuit and a sense sub-circuit, wherein
the photoelectric conversion sub-circuit is configured to generate a corresponding electrical signal according to an incident light signal and output the corresponding electrical signal to a first node;
the source follower sub-circuit is configured to generate a corresponding voltage signal or current signal according to the electrical signal of the first node and output the corresponding voltage signal or current signal to a second node;
the read sub-circuit is configured to read the voltage signal or the current signal of the second node to determine an incident light intensity;
the reset sub-circuit is configured to provide a voltage from an offset voltage terminal to the first node, wherein the voltage from the offset voltage terminal comprises a reference voltage and an offset voltage, and the offset voltage is equal to a difference between a reset voltage and a voltage of the second node sensed by the sense sub-circuit; and
the sense sub-circuit is configured to sense the voltage of the second node when the voltage of the first node is the reference voltage.