Lens, LED module and illumination system having same
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United States of America Patent
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Jun 28, 2016
Grant Date -
May 7, 2015
app pub date -
Oct 17, 2014
filing date -
Nov 5, 2013
priority date (Note) -
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Abstract
A lens, LED module and an illumination system includes an illuminated area; and at least an LED module for illuminating the illuminated area. The LED module includes an LED, and a lens mounted in the light path of the LED. The lens includes an optical axis, a light source recess arranged through the optical axis, a light emitting surface crossing through the optical axis, and a critical reflection surface arranged between the light source recess and the light emitting surface, wherein the light source recess is a rectangular hole in a section view which is vertical to the optical axis and has a center axis which overlaps with the optical axis, the light source recess has a wedge-shaped hole in a section view along the optical axis, the wedge-shaped hole has a top wall which crosses through the optical axis, the top wall has a convex surface.
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