Influence of supporting structures on illumination performances of LED lenses

초록

In this paper, a total internal reflecting-type LED lens without any supporting structures was optimally designed for forming a uniform illuminance distribution within an illumination area, and its performance degradation due to an auxiliary supporting structure attached to its outer boundary was investigated with varying the thickness of the supporting structure. It was known that the luminous flux efficiency and the illuminance uniformity of the lens could be reduced up to 1.0% and 0.8% for the supporting structure with a thickness of 0.3 mm. However, this performance degradation could be resolved by either designing the lens including a supporting structure directly or reducing the thickness of the supporting structure locally.