Package for Side Emitting LED


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A wide angle light-deflected lens combining collimation and total internal reflection (TIR) optical mechanics for LED package is proposed. Utilizing angle-dividing method the angle of emitting distribution of LED chip was cut into several angular zones and then a light-collimating curve surface with corresponding declined plane performing TIR for the collimated incident ray was designed. Thereby, the light-deflected lens, consisting of multi pairs of collimating curve surfaces and declined planes, can achieve wide-angle deflection of light emitting from LED chip. The design rule and experiment results of the lens with optimization optical design are demonstrated and discussed in this paper.



Key Engineering Materials (Volumes 364-366)

Edited by:

Guo Fan JIN, Wing Bun LEE, Chi Fai CHEUNG and Suet TO




Y. N. Pao et al., "Package for Side Emitting LED", Key Engineering Materials, Vols. 364-366, pp. 148-151, 2008

Online since:

December 2007




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DOI: 10.1889/1.1832516

[2] R. S. West, G. D. Sasser, J. W. Stewart: Lens and Lens Cap with Sawtooth Portion for Light Emitting Diode, U.S. Patent 6607286.

[3] R .S. West, Gary D. Sasser, J. W. Stewart: Side Emitting LED and Lens, U.S. Patent 6679621.

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