Patent ID: 11972342
Assignee: WAYMO LLC
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 13:
14. A method of forming an image sensor comprising:
forming a first integrated circuit layer comprising pixel sensors that are grouped based on position into pixel sensor groups;
electrically coupling a second integrated circuit layer with the first integrated circuit layer, the second integrated circuit layer comprising image processing circuitry groups that are configured to each receive pixel information from a corresponding pixel sensor group, the image processing circuitry groups further configured to perform image processing operations on the pixel information to provide processed pixel information during operation of the image sensor;
electrically coupling a third integrated circuit layer with the second integrated circuit layer, the third integrated circuit layer comprising neural network circuitry groups that are configured to each receive the processed pixel information from a corresponding image processing circuitry group, the neural network circuitry groups further configured to perform analysis for object detection on detect objects from the processed pixel information during operation of the image sensor, the third integrated circuit layer comprising circuitry configured to implement a recurrent neural network, the recurrent neural network being configured to receive the pixel information regarding the objects detected by all of the neural network circuitry groups and detect objects sensed across multiple ones of the pixel sensor groups; and
electrically coupling circuitry, that outputs information indicating results of the analysis for object detection by the neural network circuitry groups, to the neural network circuitry groups,
wherein the first integrated circuit layer is stacked on the second integrated circuit layer and the second integrated circuit layer is stacked on the third integrated circuit layer.