Illumination – Light modifier – Refractor
Reexamination Certificate
2009-05-20
2011-10-25
Truong, Bao Q (Department: 2875)
Illumination
Light modifier
Refractor
C362S339000, C362S326000, C359S742000
Reexamination Certificate
active
08042975
ABSTRACT:
A plano-Fresnel LED lens and a LED assembly thereof are revealed. The lens is a Fresnel lens whose optical surface on the forward side thereof is a plano surface having saw teeth with vertical taper (draft with vertical shape) so that the lens in the LED assembly concentrates light emitted from a LED chip to generate light whose peak intensity is an elliptic distribution pattern. Moreover, the lens and the LED assembly thereof satisfy certain conditions. Thereby, light from the LED chip is gathered by a single lens to form a preset specific distribution pattern and is satisfying requirement of the ratio of the luminous flux that is larger than 85%. The plano-Fresnel LED lens and a LED assembly thereof are applied to lights and flashlights in mobile phones or cameras.
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Chen Yi-Min
Shyu San-Woei
E-Pin Optical Industry Co., Ltd.
Muncy Geissler Olds & Lowe, PLLC
Truong Bao Q
LandOfFree
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