US Patent No. 10,276,763

LIGHT EMITTING DEVICE WITH PHASE CHANGING OFF STATE WHITE MATERIAL AND METHODS OF MANUFACTURE


Patent No. 10,276,763
Issue Date April 30, 2019
Title Light Emitting Device With Phase Changing Off State White Material And Methods Of Manufacture
Inventorship Daniel Estrada, San Jose, CA (US)
Ken Shimizu, San Jose, CA (US)
Daniel Roitman, San Jose, CA (US)
Marcel Rene Bohmer, Eindhoven (NL)
Edward Kang, San Jose, CA (US)
Assignee Lumileds LLC, San Jose, CA (US)

Claim of US Patent No. 10,276,763

1. A light emitting device (LED) comprising:a light emitting semiconductor structure comprising a light-emitting active layer disposed between an n-layer and a p-layer;
a wavelength converting material having a first surface adjacent the light emitting semiconductor structure and a second surface opposite the first surface; and
an off state white material in direct contact with the second surface of the wavelength converting material, the off state white material comprising a plurality of core-shell particles disposed in an optically functional material, each of the core shell particles comprising a core material that includes a phase change material encased in a polymer or inorganic shell.