Time of flight system capable of increasing measurement accuracy, saving power and/or increasing motion detection rate and method thereof
US9618610B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2011 |
| Grant date | Apr 11, 2017 |
| Priority date | — |
| Expiry date | May 3, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/894
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.