A Wide-Input-Voltage-Range Multi-Segmented LED Driver for Illumination and Visible Light Communication
Chen Yi1, 2, Zhang Zhiyi3, Bao Yugang1
1. College of Information Engineering Zhejiang University of Technology Hangzhou 310023 China; 2. College of Automation Hangzhou Dianzi University Hangzhou 310018 China; 3. Center of Engineering Training Zhejiang University of Science & Technology Hangzhou 310023 China
Abstract：When illumination is combined with visible light communication (VLC), the light emitting diodes (LEDs) and their drivers gain a broader application chance than before. The LED drivers for illumination and VLC need to meet both lighting electrical standards and communication requirements. Based on an input-voltage-adaptive constant-power illumination scheme, a partial return-to-zero on-off-keying (RZ-OOK) modulation scheme is proposed for a multi-segmented LED driver to have dual functions of illumination and VLC within a wide input voltage range. A prototype LED driver was implemented for experiments. Some test results show that under the illumination mode, both power factor (PF) and total harmonic distortion (THD) values satisfy the electrical standards for lighting, and the output power could keep constant. Under the continuous few-frame VLC mode, the PF and THD values still satisfy the electrical standards for lighting, and the output power regulation is tight. Under the continuous multi-frame VLC mode, although the PF values could satisfy the electrical standards for lighting, the output power regulation is poor. Therefore, the prototype under the continuous few-frame VLC mode is suitable for both illumination and VLC applications, while the prototype under the continuous multi-frame VLC mode is more suitable for VLC applications.
陈怡, 张志义, 包宇刚. 适用于照明和可见光通信的宽输入电压范围的分段式LED驱动电路[J]. 电工技术学报, 2018, 33(12): 2812-2820.
Chen Yi, Zhang Zhiyi, Bao Yugang. A Wide-Input-Voltage-Range Multi-Segmented LED Driver for Illumination and Visible Light Communication. Transactions of China Electrotechnical Society, 2018, 33(12): 2812-2820.
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2018, Vol. 33 
