Patent ID: 7663501
Filing Date: 2010-02-16
Classification: H04B,H04M,Y10S

Abstract:
1. An apparatus for controlling an emitted color of visible light in a visible light communication (VLC) device according to a current communication state, said apparatus comprising: a memory for storing data identifying one or more communication states and an associated plurality of emitting colors that are correspondingly matched to the one or more communication states to indicate each respective communication state; a pulse generator for generating a pulse signal corresponding to data to be transmitted; a modulator for modulating the pulse signal output from said pulse generator into a signal suitable for optical wireless communication; a VLC transmitter for outputting a visible light signal having a particular corresponding emitting color based on a color control signal; and a controller for determining a current communication state of the VLC device and an associated emitting color corresponding to the current communication state stored in the memory, and for providing the VLC transmitter with the color control signal to output a visible light signal having a particular corresponding emitting color based on the current communication state.