APPARATUS AND METHOD FOR CONTROLLING EMITTED VISIBLE LIGHT COLOR ACCORDING TO CURRENT STATE IN VISIBLE LIGHT OPTICAL COMMUNICATION

摘要

An apparatus for controlling a colour of visible light emitted according to a current state in a visible light communication device and a method thereof are provided to enable a user to notify which communication is performed at the predetermined time. An apparatus for controlling a colour of visible light emitted according to a current state in a visible light communication device comprises a memory(240), a pulse generator(222), a modulator(232), a visible light communication transmitter(212) and a controller(200). The memory(240) matches communication states with colours of emitted light for expressing each communication state and stores the matched communication states. The pulse generator(222) generates a pulse signal matched with data for transmission and outputs the generated pulse signal. The modulator(232) modulates the inputted pulse signal into a signal proper for wireless optical communications. The visible light communication transmitter(212) outputs a visible light signal with a corresponding colour according to a colour control signal. The controller(200) checks a current communication state and the colour of the emitted light according to the current communication state when the user selects the visible light communication mode, and outputs the control signal of the colour of the emitted light to the visible light communication transmitter(212) for outputting the visible light signal with the checked colour of the emitted light.