Remote control systems that can distinguish stray light sources
First Claim
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1. A method for distinguishing at least one predetermined light source from stray light sources, the method comprising:
- continuously modulating an output waveform of the at least one predetermined light source in accordance with at least one signature modulation characteristic;
detecting light from light sources using a photodetector;
generating photodetector data representative of the detected light; and
identifying at least one light source from the photodetector data that exhibits the at least one signature modulation characteristic.
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Abstract
Remote control systems that can distinguish predetermined light sources from stray light sources, e.g., environmental light sources and/or reflections are provided. The predetermined light sources can be disposed in asymmetric substantially linear or two-dimensional patterns. The predetermined light sources also can output waveforms modulated in accordance with one or more signature modulation characteristics. The predetermined light sources also can output light at different signature wavelengths.
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Citations
19 Claims
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1. A method for distinguishing at least one predetermined light source from stray light sources, the method comprising:
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continuously modulating an output waveform of the at least one predetermined light source in accordance with at least one signature modulation characteristic; detecting light from light sources using a photodetector; generating photodetector data representative of the detected light; and identifying at least one light source from the photodetector data that exhibits the at least one signature modulation characteristic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system comprising:
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a first predetermined light source configured to emit light at a first signature wavelength; a second predetermined light source configured to emit light at a second signature wavelength, wherein the first signature wavelength is different than the second signature wavelength; and a remote control having a photodetector module, wherein the photodetector module is configured to detect the first and second signature wavelengths of light. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification