Invention Grant
US08876325B2 Reverse total internal reflection features in linear profile for lighting applications
有权
用于照明应用的线性轮廓中的反向全内反射特征
- Patent Title: Reverse total internal reflection features in linear profile for lighting applications
- Patent Title (中): 用于照明应用的线性轮廓中的反向全内反射特征
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Application No.: US13175377Application Date: 2011-07-01
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Publication No.: US08876325B2Publication Date: 2014-11-04
- Inventor: Dong Lu , Paul Kenneth Pickard
- Applicant: Dong Lu , Paul Kenneth Pickard
- Applicant Address: US NC Durham
- Assignee: Cree, Inc.
- Current Assignee: Cree, Inc.
- Current Assignee Address: US NC Durham
- Agency: Koppel, Patrick, Heybl & Philpott
- Main IPC: F21S4/00
- IPC: F21S4/00 ; G02B19/00 ; F21V5/04 ; F21V7/00 ; F21V29/00 ; F21S8/02 ; F21Y103/00 ; F21Y113/00 ; F21Y101/02

Abstract:
An elongated lens profile having reverse total internal reflection (TIR) features that improve light extraction when the lens is used in conjunction with a plurality of light emitters. Solid state light emitters, such as LEDs, are arranged proximate to the elongated lens along a longitudinal axis of the lens body. The emitters, which may be grouped in clusters, emit toward a receiving surface of the lens. The receiving surface includes a plurality of reverse TIR features, also disposed along the longitudinal axis. These features may be defined by a series of recessed areas spaced along the longitudinal axis to correspond with the light emitters which can protrude into the negative space created by the recessed features. The recessed features may have more than one shape. The reverse TIR features improve light output uniformity, reducing hot spots along the lens, and improve output efficiency.
Public/Granted literature
- US20130003363A1 REVERSE TOTAL INTERNAL REFLECTION FEATURES IN LINEAR PROFILE FOR LIGHTING APPLICATIONS Public/Granted day:2013-01-03
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