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Light-emitting device with remote scattering element and total internal reflection extractor element

  • US 10,088,618 B2
  • Filed: 03/21/2016
  • Issued: 10/02/2018
  • Est. Priority Date: 09/13/2012
  • Status: Active Grant
First Claim
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1. A light-emitting device comprising:

  • a light-emitting element (LEE);

    a scattering element spaced apart from the LEE, configured to scatter received light and arranged to receive light from the LEE;

    an extractor arranged to form an optical interface with the scattering element through which the extractor receives light, the extractor including a side surface and an exit surface, the extractor being configured to emit light through the exit surface to an ambient environment, whereinthe side surface is shaped such that an angle of incidence of light received directly from the optical interface is reflected via total internal reflection, andthe exit surface is non-planar and comprises multiple differently shaped portions; and

    a reflective surface arranged between the optical interface and the side surface of the extractor, the reflective surface being arranged and configured to reflect light from the optical interface back into the extractor.

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