LIGHT GUIDE PIPE AND LIGHT EMITTING MODULE COMPRISING THE SAME
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United States of America Patent
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Jun 28, 2016
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Jun 28, 2016
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Abstract
A light guide pipe includes: a first light guide section formed at a first end of the light guide pipe, wherein the first light guide section is straightly extended along a longitudinal axis of the light guide pipe; a second light guide section formed at a second end of the light guide pipe, wherein an outer surface of the second light guide section is a convex curved surface, an outer diameter of the second light guide section is gradually increased along a direction from the second to the first ends, and a cavity is formed at a bottom of the second light guide section; and a third light guide section formed between the first and second light guide sections, wherein an outer surface of the third light guide section is a concave curved surface, and an outer diameter of the third light guide section is gradually decreased along the direction.
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