Photoelectric conversion device, photoelectric conversion method, and computer program
The photoelectric conversion device addresses count omissions and color shifts by adjusting recharge periods for each color filter, ensuring accurate color representation under flashing or moving light sources.
JP2026109657APending Publication Date: 2026-07-02CANON KK
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- CANON KK
- Filing Date
- 2024-12-20
- Publication Date
- 2026-07-02
AI Technical Summary
Technical Problem
Photoelectric conversion devices using avalanche photodiodes experience significant count omissions and accuracy loss when illuminated by flashing or moving light sources, leading to color shifts in the output.
Method used
A photoelectric conversion device with an avalanche photodiode that adjusts recharge periods based on color filters, using control signals to manage recharge frequency and reduce count omissions.
Benefits of technology
The device effectively suppresses color changes under flashing or moving light sources by controlling recharge periods for each color filter, maintaining accurate color representation.
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Smart Images
Figure 2026109657000001_ABST
Abstract
The present invention provides a photoelectric conversion device that can suppress color changes even in environments where flashing light sources or light sources moving within a frame are used as illumination. [Solution] The photoelectric conversion device includes an avalanche photodiode that receives light corresponding to each color of a plurality of color filters, a counter that counts and outputs the number of output signals from the avalanche photodiode, and a control unit that makes the recharge period of the avalanche photodiode corresponding to each color different for each color.
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