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    • 1. 发明授权
    • Lighting fixture for visible light communication and visible-light-communication system with same
    • 可见光通讯照明灯具及可见光通讯系统
    • US09564969B2
    • 2017-02-07
    • US14356476
    • 2012-11-05
    • Panasonic Corporation
    • Shojirou KidoEiji Shiohama
    • H04B10/116H05B33/08
    • H04B10/116H05B33/0818
    • A lighting fixture for visible light communication is configured to modulate light intensity of a light source (11) comprising a light-emitting device (2) to superpose a communication signal on illumination light. The lighting fixture includes: a power supply circuit (3) configured to control light output of the light source (11) based on a dimming signal; a switch device (Q1) for modulating an output current from the power supply circuit (3) to the light source (11); an impedance element (Rx); a communication circuit (4); and an ON circuit (6). The communication circuit (4) is configured to supply a modulation signal to a side of the switch device (Q1) to superpose the communication signal on the illumination light. The ON circuit (6) is configured to turn on the switch device (Q1) by supply power from the power supply circuit (3) when the communication circuit (4) is inactivated.
    • 用于可见光通信的照明器件被配置为调制包括发光器件(2)的光源(11)的光强度,以在照明光上叠加通信信号。 照明灯具包括:电源电路(3),被配置为基于调光信号控制光源(11)的光输出; 用于调制从电源电路(3)到光源(11)的输出电流的开关装置(Q1); 阻抗元件(Rx); 通信电路(4); 和ON电路(6)。 通信电路(4)被配置为向开关装置(Q1)的一侧提供调制信号,以将通信信号叠加在照明光上。 ON电路(6)被配置为当通信电路(4)失活时通过来自电源电路(3)的供电来接通开关装置(Q1)。