Invention Grant
- Patent Title: Time of flight system capable of increasing measurement accuracy, saving power and/or increasing motion detection rate and method thereof
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Application No.: US13044563Application Date: 2011-03-10
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Publication No.: US09618610B2Publication Date: 2017-04-11
- Inventor: Ming-Tsan Kao , En-Feng Hsu , Chuan-Wei Wang
- Applicant: Ming-Tsan Kao , En-Feng Hsu , Chuan-Wei Wang
- Applicant Address: TW Hsin-Chu
- Assignee: PixArt Imaging Inc.
- Current Assignee: PixArt Imaging Inc.
- Current Assignee Address: TW Hsin-Chu
- Agent Winston Hsu; Scott Margo
- Priority: TW099119477A 20100615
- Main IPC: G01S17/89
- IPC: G01S17/89 ; G01S7/491
Abstract:
A light source is used for emitting an invisible light toward an object. The object reflects the invisible light and reflected light is formed, and a sensor is used for receiving the reflected light. A processor is coupled to the sensor for recording a time interval of the invisible light traveling from the light source to the object and reflected from the object to the sensor. Then, the processor estimates a measurement distance of the object according to the time interval, and adjusts an emission period of the light source, an exposure period of the sensor, intensity of the invisible light, and/or main sensing range of the sensor according to the measurement distance.
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