Invention Grant
- Patent Title: LED lighting device
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Application No.: US15266325Application Date: 2016-09-15
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Publication No.: US10261230B2Publication Date: 2019-04-16
- Inventor: Ekkehard Gaydoul , Armin Plichta , Juergen Meinl , Bjoern Bleisinger , Martin Cramer , Thomas Reichert , Marc Timon Sprzagala , Sandra Mattheis
- Applicant: Schott AG
- Applicant Address: DE Mainz
- Assignee: Schott AG
- Current Assignee: Schott AG
- Current Assignee Address: DE Mainz
- Agency: Ohlandt, Greeley, Ruggiero & Perle, LLP
- Priority: DE102011015161 20110326; DE102011084062 20111006
- Main IPC: F21S41/24
- IPC: F21S41/24 ; F21V8/00 ; F21S43/13 ; F21S43/237 ; F21S41/14 ; F21S43/245 ; G02B5/04 ; G02B6/02 ; B60Q3/64 ; B60Q3/43 ; F21S2/00 ; F21W106/00 ; F21W107/30 ; F21S41/141 ; F21Y115/10 ; B64D11/00 ; B60Q3/62 ; F21W121/00

Abstract:
LED lighting devices are provided that include two optical waveguides and at least one LED in an intermediate region between end faces of the optical waveguides so that radiation from the LED is coupled into the optical waveguides through the end faces. A de-coupler is on outer circumferential surface regions of each of the two separate optical waveguides. The de-coupler reflects the radiation guided in the optical waveguides so that the radiation passes through the optical waveguides and is coupled out of the optical waveguides laterally. The intermediate region has a length that is selected so that a brightness difference, measured perpendicular to an axis of the optical waveguides in the center of the intermediate region, at a distance of 10 mm perpendicular to the axis of the optical waveguides is at most 25% based on a maximum value of brightness along the axis of the optical waveguides.
Public/Granted literature
- US20170031077A1 LED LIGHTING DEVICE Public/Granted day:2017-02-02
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