×

Engineered-phosphor LED packages and related methods

  • US 9,425,368 B2
  • Filed: 08/13/2015
  • Issued: 08/23/2016
  • Est. Priority Date: 02/19/2013
  • Status: Active Grant
First Claim
Patent Images

1. A light-emitting device comprising:

  • a bare light-emitting die having an emission surface;

    a binder disposed over at least a portion of the emission surface; and

    disposed within a first portion of the binder, a first plurality of wavelength-conversion particles for absorbing at least a portion of light emitted from the light-emitting die and emitting converted light having a different wavelength, wherein;

    (i) converted light and unconverted light emitted by the light-emitting die combine to form substantially white light,(ii) a concentration of the first plurality of wavelength-conversion particles varies in a direction substantially perpendicular to the emission surface to result in a divergence of color temperature of the substantially white light emitted from the binder that varies, over an angular range of 0°

    to 70°

    , no more than 0.01 in terms of a Δ

    u′

    v′

    deviation from a spatially weighted averaged chromaticity,(iii) u′ and

    v′

    are chromaticity coordinates on a chromaticity diagram, and(iv) a second portion of the binder is substantially free of wavelength-conversion particles.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×