Image sensor and method of controlling the same
By using a single-frequency signal and photodiode group difference calculation in an indirect ToF image sensor, the power consumption and frame rate issues were resolved, achieving a performance improvement in low-power, high-frame-rate image sensors.
CN122249745APending Publication Date: 2026-06-19LX SEMICON CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- LX SEMICON CO LTD
- Filing Date
- 2024-08-27
- Publication Date
- 2026-06-19
AI Technical Summary
Technical Problem
Indirect ToF image sensors suffer from increased power consumption and decreased depth frame rate when using multi-frequency modulation, especially when the camera or object is moving, the performance degrades further.
Method used
It uses a single-frequency signal transmission and receives signals through multiple photodiodes. It calculates the object position by utilizing the differences in a specific group of signals, thereby reducing the number of subframes, lowering power consumption, and increasing the frame rate.
Benefits of technology
It effectively reduces power consumption, increases frame rate, and reduces motion blur and depth error, maintaining high performance, especially when the camera or object is moving.
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Figure CN122249745A_ABST
Abstract
An image sensor according to one embodiment of the present invention includes: a light-emitting unit that emits a signal of a single frequency; a lens and a plurality of photodiodes that receive signals reflected from an object; and a controller. For example, the controller groups the signals received by the plurality of photodiodes and calculates the position of the object using the difference between the signals of the first group and the signals of the second group.
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