Short-distance communication method and apparatus using...

Details Short-distance communication method and apparatus using... Short-distance communication method and apparatus using...

2007-10-19

2010-10-19

Pascal, Leslie (Department: 2613)

Optical communications

Transmitter and receiver system

Including visible light modulation

C398S034000, C398S038000, C398S094000, C398S120000

Reexamination Certificate

active

07817920

ABSTRACT:
Disclosed is a short-distance communication method and an apparatus using visible light. The apparatus scans ambient light, measures optical power of visible light, among visible light included in the ambient light, having a wavelength corresponding to a transmission wavelength used for the visible light communication, compares a minimum transmission optical power of transmitted light, a real transmission optical power, and the measured optical power of the ambient light, selects a transmission wavelength of the transmitted light on which noises caused by the ambient light have little effect, and performs the visible light communication using the visible light of the selected transmission wavelength.

REFERENCES:
patent: 5051768 (1991-09-01), Harrison
patent: 2001-71931 (2001-07-01), None

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