公开(公告)号：US12120446B2

公开(公告)日：2024-10-15

申请号：US18008302

申请日：2021-07-12

Applicant: Semiconductor Energy Laboratory Co., Ltd.

Inventor： Shunsuke Sato ,  Seiichi Yoneda ,  Yusuke Negoro ,  Takeya Hirose ,  Shunpei Yamazaki

IPC: H04N25/77

CPC classification number: H04N25/77

Abstract: An imaging device that has an image processing function and is capable of operating at high speed is provided. The imaging device has an additional function such as image processing, image data obtained by an imaging operation is binarized in a pixel unit, and a product-sum operation is performed using the binarized data. A memory circuit is provided in the pixel unit and retains a weight coefficient used for the product-sum operation. Thus, an arithmetic operation can be performed without the weight coefficient read from the outside every time, whereby power consumption can be reduced. Furthermore, a pixel circuit, a memory circuit, and the like and a product-sum operation circuit and the like are stacked, so that the lengths of wirings between the circuits can be reduced, and high-speed operation with low power consumption can be performed.

公开(公告)号：US12225314B2

公开(公告)日：2025-02-11

申请号：US17995803

申请日：2021-04-09

Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

Inventor： Seiichi Yoneda ,  Yusuke Negoro ,  Takeya Hirose ,  Shunsuke Sato ,  Shunpei Yamazaki

IPC: H04N25/78 ,  H04N25/771 ,  H04N25/79 ,  H10K39/32

Abstract: An imaging device that has an image processing function and is capable of a high-speed operation is provided. The imaging device has an additional function such as image processing, and can retain analog data obtained by an image capturing operation in pixels and extract data obtained by multiplying the analog data by a given weight coefficient. In the imaging device, the data is stored in a memory cell and pooling processing of data stored in a plurality of memory cells can be performed. The pixels are provided so as to have a region overlapping with at least one of the memory cells, a pooling processing circuit, and a reading circuit of the pixels; thus, an increase in the area of the imaging device can be inhibited even with an additional function.