Invention Grant
- Patent Title: Bat-wing lens design with multi-die
- Patent Title (中): 蝙蝠翼透镜设计与多模
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Application No.: US14303628Application Date: 2014-06-13
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Publication No.: US09306136B2Publication Date: 2016-04-05
- Inventor: Ching-Yi Chen , Hao-Yu Yang
- Applicant: TSMC Solid State Lighting Ltd.
- Applicant Address: TW Hsinchu
- Assignee: EPISTAR CORPORATION
- Current Assignee: EPISTAR CORPORATION
- Current Assignee Address: TW Hsinchu
- Agency: Muncy, Geissler, Olds & Lowe, P.C.
- Main IPC: H01L21/00
- IPC: H01L21/00 ; H01L33/58 ; H01L25/075 ; H01L33/00 ; H01L33/54

Abstract:
A batwing beam is produced from an optical emitter having a primary LED lens over a number of LED dies on a package substrate. The LED lens includes a batwing surface formed by rotating a parabolic arc about an end of the parabolic arc over a center of the optical emitter. A center of each of the LED dies is mounted to the package substrate about the focus of a parabola whose arc forms the batwing surface, for example, between about 0.5 to 1.5 of a focal distance from the vertex of the parabola. The batwing surface reflects light from the number of LED dies through total internal reflection (TIR) or through a reflectivity gel coating.
Public/Granted literature
- US20140295592A1 BAT-WING LENS DESIGN WITH MULTI-DI Public/Granted day:2014-10-02
Information query
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