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首页> 外文会议>2014 International Conference on Advances in Energy Conversion Technologies : Intelligent Energy Management: Technologies and Challenges >Hardware implementation of digitaly controlled colour temperature tuneable white light
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Hardware implementation of digitaly controlled colour temperature tuneable white light

机译：数控色温可调白光的硬件实现

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Light Emitting Diodes have fundamentally altered several of the dynamics within the industry itself and the technology has been touted as fourth generation lighting technology. With LED lighting controllers, the coloured LEDs have launched a new dimension in architectural lighting. RGB LED lighting fixtures offer endless colour changing possibilities to enhance environment in an interior. The forward characteristics of Red, Green and Blue LEDs indicate the region of control to produce acceptable level of light intensities because the intensity of light produced by an LED is proportional to its forward current. In this paper, a digital controller based RGB driver was designedto enable the operation of the LED cluster for various shades of white. The proposed LED driver system is also able to adjust duty cycle of each individual LED through a digital controller circuit. The proposed driver maintains the minimum drive voltage across the RGB LEDs and current controllers required to keep it in regulation by selecting the minimum drain voltage of the MOSFETs. The developed system is tested for its photometric characteristics. The Lumen output of the source developed remained same when operated at different colour temperatures of white shades.
机译：发光二极管从根本上改变了行业本身的几种动力，该技术被誉为第四代照明技术。借助LED照明控制器，彩色LED已在建筑照明领域掀起了新的一页。 RGB LED照明灯具提供了无限的变色可能性，以改善室内环境。红色，绿色和蓝色LED的正向特性指示产生光强度可接受水平的控制区域，因为LED产生的光的强度与其正向电流成正比。在本文中，设计了一种基于数字控制器的RGB驱动器，以使LED群集能够针对各种白色阴影进行操作。所提出的LED驱动器系统还能够通过数字控制器电路来调节每个单独的LED的占空比。建议的驱动器通过选择MOSFET的最小漏极电压来保持RGB LED和电流控制器两端保持其稳定所需的最小驱动电压。所开发的系统已经过光度学特性测试。当在白色阴影的不同色温下工作时，光源的流明输出保持不变。

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