Design a LED coupler to collocate with a light guide plate for illumination

Tun-Chien Teng; Li-Wei Tseng

doi:10.1117/12.2062966

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25 September 2014 Design a LED coupler to collocate with a light guide plate for illumination

Tun-Chien Teng; Li-Wei Tseng

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Proceedings Volume 9190, Thirteenth International Conference on Solid State Lighting; 91900L (2014) https://doi.org/10.1117/12.2062966
Event: SPIE Optical Engineering + Applications, 2014, San Diego, California, United States

Abstract

With progress in the LED luminous efficiency, the LED gradually expands the scope of application from the backlight to general lighting. In the application of the backlight, a light guide plate (LGP) is used to guide the LED light and emits the light uniformly from its surface to achieve a uniform planar light source. Except for the merit of slim volume, the LGP can prevent the LED light from directly entering the eyes resulting in glare; thereby the LGP is also used for general lighting applications, especially for the high-directionality lighting with slim volume. For the illumination, the prescribed distribution of the light emitted from the LGP had better modulated by both the microstructure on the LGP surface and a LED lens/coupler. In general, distribution of the light emitted from the LED is partially adjusted by the LED lens/coupler before the light entering the LGP. In this study we designed a LED coupler to collocate with two types of LGPs so that the LGP can uniformly emits the highly-collimated light or the light with the prescribed intensity distribution, which can be used for the backlight or lighting application, respectively.

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Tun-Chien Teng and Li-Wei Tseng "Design a LED coupler to collocate with a light guide plate for illumination", Proc. SPIE 9190, Thirteenth International Conference on Solid State Lighting, 91900L (25 September 2014); https://doi.org/10.1117/12.2062966

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