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US 2014/0152974 A1Published application
Method for time of flight modulation frequency detection and illumination modulation frequency adjustment
AssigneeTexas Instruments Incorporated
InventorDong-Ik KO
Life of this patent
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Abstract
A method removing adjecent frequency interference from a Time Of Flight sensor system by adaptively adjusting the infrared illumination frequency of the TOF sensor by measuring the interfering infrared illuminating frequencies and dynamicaly adjusting the illuminating infrared frequency of the TOF sensor to eliminate the interference.
Claims3
A method of interference rejection in a Time of Flight (TOF) measurement system comprising the steps of:
- receiving all ambient infrared illumination;
- measuring the modulation frequencies of said received infrared illumination;
- comparing duration of said measured modulation frequencies to a preset threshold;
- adjusting the infrared illumination modulating frequency of the Time of Flight measurement system if the preset threshold is exceeded.
1 more element
Dependencies are inferred from the claim text.