高效率窄光谱LED模组技术研究

Research on High Efficiency Narrow Luminous Spectrum LED Module Technology

研究了不同的集成封装窄光谱LED技术方案,获得光谱半宽10 nm左右的LED模组。实验表明,集成滤光片的模组光谱半宽显著减小,但是峰值波长随着光出射角偏离轴线而增加,在积分测试条件下经过滤光片的积分光谱半宽比单一方向的光谱半宽增加。利用不同的封装结构研究了其内部光场分布对发光效率的影响,实验表明TIR透镜可以有效的将LED器件发出的光集中到小的光束角内,而小的LED光分布角可以有效地提高窄光谱模组在轴线方向的能量分布,进而提高其总发光效率。实验证实经过内部准直的集成滤光片LED模组具有更高的整体效率和光谱半宽性能,可以通过在窄光谱模组的滤光片器件之前整合窄光束角的透镜有助于获得更好的积分光谱半宽,这对于进一步改善用于通信、生物等超越照明领域LED器件的发光效率具有指导意义。

Different technical solutions of integrated packaged narrow-spectrum LEDs were investigated to obtain LED modules with spectral half-widths of about 10 nm.The experiments show that the spectral half-width of the module with integrated filter decreases significantly,but the peak wavelength increases with the light exit angle off-axis,and the integrated spectral half-width after the filter under the integration test conditions increases than the spectral half-width in a single direction.The effect of the internal light field distribution on the luminous efficiency was investigated using different package structures.The experiments showed that a small LED light distribution angle can effectively improve the energy distribution of the narrow-spectrum module in the axial direction,which in turn improves its total luminous efficiency.It is confirmed that a narrow beam angle lens can be integrated before the filter device of the narrow spectral module to help obtain a better integrated spectral half-width,which is a guideline for further improving the luminous efficiency of LED devices for biological applications.