- Patent Title: Light guide illumination device for direct-indirect illumination
-
Application No.: US15415722Application Date: 2017-01-25
-
Publication No.: US09891371B2Publication Date: 2018-02-13
- Inventor: Allan Brent York , Ferdinand Schinagl , Wilson Dau , Louis Lerman , Hans Peter Stormberg
- Applicant: Quarkstar LLC
- Applicant Address: US NV Las Vegas
- Assignee: Quarkstar LLC
- Current Assignee: Quarkstar LLC
- Current Assignee Address: US NV Las Vegas
- Agency: Fish & Richardson P.C.
- Main IPC: F21V7/04
- IPC: F21V7/04 ; F21V8/00 ; F21K9/61 ; F21V7/00 ; F21S8/02 ; G02B19/00 ; F21Y103/10 ; F21Y101/00 ; F21Y115/10

Abstract:
An illumination device includes light-emitting elements (LEEs); a light guide extending in a forward direction from a first end to a second end, the light guide being positioned to receive at the first end light emitted by the LEEs and to guide the received light to the second end; and an optical extractor coupled to the second end to receive the guided light. The optical extractor is formed from a transparent, solid material and includes a first output surface including a transmissive portion arranged and shaped to transmit a first portion of the guided light to the ambient in a forward angular range and a reflective portion arranged and shaped to reflect via TIR all the guided light incident on the reflective portion; and a second output surface arranged to transmit, to the ambient in a backward angular range, light reflected by the reflective portion of the first output surface.
Public/Granted literature
- US20170357048A1 Light Guide Illumination Device for Direct-Indirect Illumination Public/Granted day:2017-12-14
Information query