In visible light communication, it is difficult to control dimming of LED lamp or flicker occurs due to changes in luminous flux according to the data. In this paper, to solve this problem, we proposed a new correction scheme for dimming level in which the dimming level of an LED lamp is corrected in real time by considering the data transmission status. A non-linear correction scheme was applied for red and green LEDs because of the non-linear characteristics of the luminous flux according to the dimming level. Since the blue LED’s luminous flux can be assumed to be linear, a linear correction scheme using two-stage current was applied for blue LED in order to lower the minimum possible dimming level. A downscaled model of the visible light communication system was created to verify the validity of the proposed correction scheme for the dimming level. The luminous flux of red, green, and blue LEDs was also measured according to the dimming level. As a result, the dimming range of 9–100% was obtained regardless of the transmitted data condition. Also, transmitting the data of three sensors through red, green, and blue LEDs and constantly maintaining the entire lighting of the LED lamp are possible by applying the proposed dimming scheme.

中文翻译：

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可见光通信中考虑R、G、B LED发光特性的调光校正方案

在可见光通信中，很难根据数据控制LED灯的调光或因光通量变化而发生的闪烁。在本文中，为了解决这个问题，我们提出了一种新的调光水平校正方案，该方案通过考虑数据传输状态实时校正 LED 灯的调光水平。由于根据调光级别的光通量的非线性特性，对红色和绿色 LED 应用了非线性校正方案。由于可以假设蓝色 LED 的光通量是线性的，因此对蓝色 LED 应用了使用两级电流的线性校正方案，以降低可能的最小调光水平。创建了可见光通信系统的缩小模型，以验证所提出的调光水平校正方案的有效性。红色、绿色和蓝色 LED 的光通量也根据调光级别进行测量。结果，无论传输的数据条件如何，都获得了 9-100% 的调光范围。此外，通过应用所提出的调光方案，可以通过红色、绿色和蓝色 LED 传输三个传感器的数据并持续保持 LED 灯的整体照明。