Light detection circuit and method, lidar and storage medium, and detection system

A LiDAR comprising:

• an array of light emitter units configured to output an emitted signal;
• a light detector comprising:
• an array of photodetectors configured to receive an echo signal reflected after the emitted signal collides with an obstacle, receive light signals, and generate electrical signals corresponding to the light signals;
• an array of switches comprising a plurality of first switches, each of the plurality of first switches couples to a respective one of the array of photodetectors, and each of the plurality of first switches is configured to control an operating state of the respective one of the array of photodetectors for a signal output terminal of the respective one of the array of photodetectors to output the electrical signals;
• and
• a selector configured to select the respective one of the array of photodetectors in the operating state to output the electrical signals;
• and
• a controller module coupled with the light emitter and the light detector, and configured to transmit switch signals to an array of switches to:
• set switch states of a portion of the array of switches to drive a plurality of photodetectors of the light detector coupled to the portion of the array of switches to activate detection of light signals, and
• set switch states of a remainder of the array of switches to deactivate photodetectors coupled to the remainder of the array of switches.