Patent ID: 11933924
Assignee: BOE TECHNOLOGY GROUP CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. An active pixel sensor, comprising:
a light sensing device configured to convert light sensed by the light sensing device into charges and supply the charges to a floating diffusion node;
an amplification sub-circuit having an input terminal coupled to the floating diffusion node, a bias terminal coupled to a first power supply voltage terminal for supplying a first power supply voltage, and an output terminal, and configured to amplify a signal according to a potential at the floating diffusion node and output the amplified signal through the output terminal;
an adjustment sub-circuit comprising an amorphous metal nonlinear resistor (AMNR) that has a first electrode coupled to the floating diffusion node, an insulating layer on a side of the first electrode, and second and third electrodes arranged side by side and spaced apart from each other on a side of the insulating layer away from the first electrode and coupled to the second power supply voltage terminal and the first control signal terminal, respectively, and is configured to change a capacitance value between the first electrode and the second electrode in response to a first control signal provided by the first control signal terminal, such that the conversion gain from the amount of the light sensed by the light sensing device to the potential at the floating diffusion node is changed; and
a read sub-circuit having a control terminal coupled to a scan line, an input terminal coupled to the output terminal of the amplification sub-circuit, and an output terminal, and configured to transmit a voltage of the input terminal of the read sub-circuit to the output terminal of the read sub-circuit according to a scan signal provided by the scan line.