Pixel and image sensor
By designing a pixel structure that supports both global exposure and drum exposure, switching exposure modes and conversion gain, the problem of insufficient dynamic range in CMOS image sensors under global exposure was solved, thus realizing a high dynamic range image sensor.
WO2026103005A1 Publication Date: 2026-05-21CHENGDU LIGHT COLLECTOR TECH
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Patent Information
- Application Number
- PCT/CN2025/087914
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-11-12
- Filing Date
- 2025-04-09
- Publication Date
- 2026-05-21
AI Technical Summary
Technical Problem
Existing CMOS image sensors struggle to achieve high dynamic range in global exposure mode, and multi-frame synthesis algorithms cannot be used, resulting in motion artifacts and insufficient dynamic range.
Method used
Design a pixel structure that includes a photosensitive unit, a transmission unit, a reset unit, an amplification unit, a storage unit, a switching unit, and an output unit. The switching unit switches the exposure mode and conversion gain, supports global exposure and drum exposure, and achieves high dynamic range.
Benefits of technology
It achieves high dynamic range in both global exposure mode and drum exposure mode, solves the problems of motion artifacts and insufficient dynamic range, and supports switching of conversion gain in different exposure modes.
✦ Generated by Eureka AI based on patent content.
Abstract
A pixel and an image sensor, relating to the technical field of image sensors. The pixel comprises: a photosensitive unit for generating electric charges in response to light; a transmission unit for transmitting the electric charges generated by the photosensitive unit to a floating diffusion node; a reset unit for resetting the pixel; an amplification unit for amplifying a voltage at the floating diffusion node and outputting the amplified voltage to a storage unit; the storage unit for storing a reset voltage and a signal voltage; a switching unit for switching an exposure mode of the pixel and switching a conversion gain of the pixel in the exposure mode, wherein the exposure mode comprises a global shutter mode and a rolling shutter mode; and an output unit for outputting the reset voltage and the signal voltage. The pixel supports global shutter and rolling shutter, and supports a high dynamic range in both a global shutter mode and a rolling shutter mode.
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