The effects of DBR reflectivity and well Numbers on threshold current and output power of bottom-emitting VCSELs were analyzed to design an optimal device structure.

分析了腔镜反射率、量子阱数等参数对阈值电流、输出光功率的影响，并根据理论计算对器件参数进行了优化设计。

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The new lens, which is thinner at the bottom than at the top, steers light to a viewer's eyes by switching light-emitting diodes along its bottom edge on and off.

这个新镜头，底部比顶部更薄，通过切换镜头底部边缘的发光二极管的开和关，控制进入到观众的眼睛的光线。

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The study is for diffusely emitting, diffusely and specularly reflecting inner wall of tube and its bottom black body surface of a fictitious circle burner.

圆管壁为漫发射、漫反射镜反射混合分布，管底部为假想的圆形黑体辐射器。

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OLETs rely on three layers of material, with the bottom layers carrying a charge, the middle layer (the meat in this high-tech sandwich) emitting photons when excited by the bottom, and the top layer selectively letting those photos through.

ENGADGET: Organic Light Emitting Transistors might make us forget all about OLED