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Reducing the variation of far-field radiation patterns of flipchip light emitting diodes
Reducing the variation of far-field radiation patterns of flipchip light emitting diodes
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机译:减少倒装芯片发光二极管远场辐射方向图的变化
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摘要
The present invention relates to reducing the spatial variation in light output from flipchip LEDs and increasing the consistency in light output from LED to LED in a practical manufacturing process. The present invention introduce appropriate texture into the surface of reflective layer to reduce spatial variation in far-field intensity. At least two reflective planes are provided in the reflective contact parallel to the light emitting region such that at least two interference patterns occur in the light exiting from the LED. The reflective planes are separated by an odd integral multiple of (&lgr;n/4) where &lgr;n is the wavelength of the light in the layer between the active region and the reflective contact, resulting in compensating interference maxima and minima, a more uniform distribution of light, and increased consistency in light output from LED to LED.
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机译:本发明涉及在实际制造过程中减少从倒装芯片LED输出的光的空间变化并增加从LED到LED的光输出的一致性。本发明将适当的纹理引入反射层的表面以减小远场强度的空间变化。在与光发射区域平行的反射触点中设置至少两个反射平面,从而在从LED射出的光中出现至少两个干涉图案。反射平面被(&lgr; n Sub> / 4)的奇数整数倍分隔,其中&lgr; n Sub>是有源区域和有源区域之间的层中的光的波长。反射触点,可以补偿最大和最小的干扰,使光的分布更均匀,并提高从LED到LED的光输出的一致性。
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