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以正六棱锥型图形化蓝宝石衬底GaN基LED为研究对象,设计并探讨了正六棱锥图案在排布过程中旋转角的变化对LED出光效率的影响,得出各面光通量随旋转角变化的规律:在0°～30°范围,随着旋转角的增大,总光通量与顶部光通量有下降趋势,底部光通量有增长趋势。当六棱锥旋转角在0°～6°范围内时,LED芯片的总光通量和顶部光通量均有最优值。综合考虑,旋转角为0°～6°的六棱锥型图形衬底对正装LED的出光效率有最佳的优化效果。
Taking the hexagonal pyramid-shaped sapphire substrate as a research object, the influence of the change of the rotation angle of the regular hexagonal pyramid pattern on the LED light-emitting efficiency was studied and the law of the luminous flux variation with the rotation angle was obtained : In the range of 0 ° ~ 30 °, the total luminous flux and the top luminous flux have a downward trend with the increase of the rotational angle, and the bottom luminous flux has a tendency of increasing. When the hexagonal cone rotation angle is within the range of 0 ° ~ 6 °, the total luminous flux and the top luminous flux of the LED chip have the optimal values. Taken together, the rotation angle of 0 ° ~ 6 ° hexagonal pyramid-shaped graphics substrate is installed LED has the best light extraction efficiency.