LIGHT-EMITTING DIODE WITH MOULDED BI-DIRECTIONAL OPTICS Russian patent published in 2014 - IPC H01L33/00 

Abstract RU 2512110 C2

FIELD: physics, optics.

SUBSTANCE: invention can be used for light applications other than backlights, where the vertical beam pattern (collimation pattern) and the side-light emission pattern can be substantially independently specified. A double-moulded lens for a LED includes an outer lens moulded around the periphery of a LED chip and a collimating inner lens moulded over the top surface of the LED chip and partially defined by a central opening in the outer lens. The outer lens is formed using silicone having a relatively low refraction index such as n=1.33-1.47, and the inner lens is formed from silicon with a higher refraction index, such as n=1.54-1.76, to cause total internal reflection within the inner lens.

EFFECT: shorter mixing region, thinner LED without loss of efficiency.

15 cl, 15 dwg

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RU 2 512 110 C2

Authors

Birkhehjzen Serzh

Battervort Mark

Dates

2014-04-10Published

2009-10-29Filed