US 12,452,552 B2
Image sensor and image processing system
Shoushun Chen, Shanghai (CN); and Menghan Guo, Shanghai (CN)
Assigned to OmniVision Sensor Solution (Shanghai) Co., Ltd, Shanghai (CN)
Filed by OmniVision Sensor Solution (Shanghai) Co., Ltd, Shanghai (CN)
Filed on Oct. 18, 2023, as Appl. No. 18/381,244.
Application 18/381,244 is a continuation of application No. PCT/CN2021/090429, filed on Apr. 28, 2021.
Claims priority of application No. 202110425391.1 (CN), filed on Apr. 20, 2021.
Prior Publication US 2024/0048859 A1, Feb. 8, 2024
Int. Cl. H04N 25/47 (2023.01); H04N 25/709 (2023.01)
CPC H04N 25/47 (2023.01) [H04N 25/709 (2023.01)] 15 Claims
OG exemplary drawing
 
1. An image sensor, comprising:
a pixel collection circuit array composed of a plurality of pixel collection circuits, wherein the pixel collection circuits are suitable for monitoring a light intensity change in a field of view and entering a trigger state when the light intensity change satisfies a certain conditions;
an activity detection unit coupled to the pixel collection circuit array via a global activity detection signal line, and suitable for monitoring a current value on the global activity detection signal line and setting a low-activity enable signal to be valid when the current value is smaller than an activity threshold, wherein the current value is positively correlated to the number of the pixel collection circuits in the trigger state in the pixel collection circuit array;
a low-power control unit having one end coupled to the pixel collection circuit array and a reading unit via a global low-power enable signal line and the other end coupled to the activity detection unit, and suitable for setting the global low-power enable signal to be valid when the low-activity enable signal is valid; and
the reading unit coupled to the pixel collection circuit array and the low-power control unit separately and suitable for being reset when the global low-power enable signal is valid.