LIGHT EMITTING DEVICES AND APPLICATIONS THEREOF

• US 20100321953A1
• Filed: 05/03/2010
• Published: 12/23/2010
• Est. Priority Date: 05/01/2009
• Status: Active Grant

• Current Assignee: ABL IP Holding LLC (Acuity Brands, Inc.), Fusion Optix Inc.
• Original Assignee: Massachusetts Development Finance Agency (STATE OF MASSACHUSETTS)
• Inventors: Yi Yan Ngai, Peter, Zhang, John X., Coleman, Zane
• Granted Patent: US 8,794,812 B2
• Time in Patent Office: Days
• US Class Current: 362/607
• CPC Class Codes: F21S 8/04 intended only for mounting on a ceiling or the like overhead structures F21S8/02 takes precedence; details of ceiling bases F21V21/03
• CPC Class Codes: F21S 8/06 by suspension
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G02B 6/0035 provided on the surface of the light guide or in the bulk of it
• CPC Class Codes: G02B 6/0061 to provide homogeneous light output intensity
• CPC Class Codes: G02B 6/0063 for extracting light out both the major surfaces of the light guide

Abstract

In one aspect, the present invention provides light emitting devices, including light fixtures and luminaires. In some embodiments, a light emitting device comprises at least one light source, a lightguide operable to receive light from the at least one light source at a first location on the lightguide, at least one light extraction region optically coupled to the lightguide and a substantially non-scattering region along a portion of the lightguide.

Claims