Time of flight system capable of increasing measurement accuracy, saving power and/or increasing motion detection rate and method thereof
First Claim
1. A method of time of flight capable of increasing motion detection rate, comprising:
- transmitting invisible light to detect an object;
recording a time interval of the invisible light traveling to the object, being reflected from the object, and traveling to a sensor; and
dynamically adjusting a main sensing portion of the sensor according to the time interval;
wherein a size in pixels of the main sensing portion is smaller than a size in pixels of the sensor.
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Accused Products
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.
21 Citations
11 Claims
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1. A method of time of flight capable of increasing motion detection rate, comprising:
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transmitting invisible light to detect an object; recording a time interval of the invisible light traveling to the object, being reflected from the object, and traveling to a sensor; and dynamically adjusting a main sensing portion of the sensor according to the time interval; wherein a size in pixels of the main sensing portion is smaller than a size in pixels of the sensor. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A time of flight system capable of increasing motion detection rate, comprising:
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a light source for transmitting invisible light toward an object; a sensor for receiving reflected light reflected by the object; and a processor coupled to the sensor for recording a time interval of the invisible light traveling to the object, being reflected from the object, and traveling to the sensor, and dynamically adjusting a main sensing portion of the sensor according to the time interval; wherein a size in pixels of the main sensing portion is smaller than a size in pixels of the sensor. - View Dependent Claims (8, 9, 10, 11)
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Specification