• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Sixth International Conference on Solid State Lighting >Lighting simulations using smoothed LED profiles compared with measured profiles
【24h】

Lighting simulations using smoothed LED profiles compared with measured profiles

机译：使用平滑的LED轮廓和实测轮廓进行照明模拟

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Ray tracing simulations of LED lighting systems typically use the smooth angular intensity profiles supplied by the LED manufacturer. However, measurements of a range of 5 mm LEDs presented in this paper show bright regions in the LEDs' angular distributions. The intensity patterns and bright regions vary between different LEDs, even when the measured angle for 50% integrated light output (as measured using an integrating sphere) is similar. When non-diffuse or partially diffuse optical elements such as clear light guides are part of a lighting system design, this source profile unevenness is intensified, so that bright caustic rings are formed. We have performed lighting simulations using coloured LEDs coupled into a clear light guide, and compared the light output using smoothed LED profiles with that using actual measured profiles. The simulated light patterns projected from the end of a light guide onto a screen are compared with that obtained by experiment. It is shown that the uniqueness of individual LED beam patterns needs to be taken into account for simulation accuracy. This is particularly important when the lighting system combines the output from several LEDs. It is also shown to be crucial in optimising the amount and type of diffusion required for homogenising the light distribution.
机译：LED照明系统的光线跟踪模拟通常使用LED制造商提供的平滑角强度曲线。但是，对本文介绍的5 mm LED范围进行的测量显示，LED的角度分布中存在明亮区域。即使在50％积分光输出的测量角度（使用积分球测量）相似的情况下，不同LED之间的强度模式和亮区也会有所不同。当非漫射或部分漫射的光学元件（例如透明光导）成为照明系统设计的一部分时，这种光源轮廓不均匀性会加剧，从而形成明亮的苛性环。我们使用耦合到透明光导的彩色LED进行了照明模拟，并将使用平滑LED轮廓的光输出与使用实际测量轮廓的光输出进行了比较。从光导末端投影到屏幕上的模拟光图案与通过实验获得的光图案进行了比较。结果表明，为了提高仿真精度，需要考虑单个LED光束图案的唯一性。当照明系统组合多个LED的输出时，这一点尤其重要。在优化均匀化光分布所需的漫射的数量和类型方面，它也显示出至关重要的作用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号