Solid-state imaging device

By introducing a counter group and a selection unit into the solid-state imaging device, the problems of excessive power consumption and signal transmission bandwidth in event-driven devices are solved, achieving both reduced power consumption and reduced signal transmission bandwidth, making it suitable for sparse imaging objects.

CN120937387APending Publication Date: 2025-11-11HAMAMATSU PHOTONICS KK
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Patent Information

Application Number
CN202480023412.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2023-04-03
Filing Date
2024-02-15
Publication Date
2025-11-11

AI Technical Summary

Technical Problem

In conventional event-driven solid-state cameras, multiple pixels transmit position and event signals to the subsequent processing unit when an event is detected, resulting in excessive power consumption and signal transmission bandwidth.

Method used

A solid-state imaging device is employed, comprising a light-receiving unit, a counter group, and a selection unit. The counter group counts event signals, and the selection unit selects a counter corresponding to the pixel and event type, thereby reducing signal transmission bandwidth and power consumption.

Benefits of technology

It achieves a reduction in signal transmission bandwidth without increasing power consumption, and further reduces the number of counters and improves time resolution when applicable to sparse camera objects.

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Abstract

This solid-state imaging device (1A) is provided with a light receiving unit (10A), a reading unit (20), a selection unit (30), a counter group (40A), a processing unit (50), and a control unit (60A). The light receiving unit (10A) includes N pixels (12A). The counter group (40A) includes M counters. Each pixel (12A) detects an event and outputs an event signal. A selection unit (30) selects a plurality of counters corresponding to the pixel and the event type to which the event signal has been output on the basis of the correspondence between each pixel and each event type and the counter, and inputs the event signal to the selected plurality of counters. As a result, an event-driven solid-state imaging device capable of reducing both power consumption and signal transmission bandwidth is realized.
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Citation Information

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