US Patent No. 10,190,042

SILICONE PRODUCT, A LIGHTING UNIT COMPRISING THE SILICONE PRODUCT AND METHOD OF MANUFACTURING A SILICONE PRODUCT


Patent No. 10,190,042
Issue Date January 29, 2019
Title Silicone Product, A Lighting Unit Comprising The Silicone Product And Method Of Manufacturing A Silicone Product
Inventorship Antonius Wilhelmus Maria Delaat, Eindhoven (NL)
Roelof Koole, Eindhoven (NL)
Marcel Rene Bohmer, Eindhoven (NL)
Assignee Lumileds LLC, San, CA (US)

Claim of US Patent No. 10,190,042

1. A method of manufacturing a silicone product comprising immobilized luminescent material, the method comprises the steps of:obtaining a first mixture comprising a homogeneous mixture of (1) filler particles of a light transmitting inert material and (2) a luminescent material comprising luminescent particles showing quantum confinement and having at least in one dimension a size in the nanometer range,
obtaining a second mixture from the first mixture by flocculating the luminescent particles on surfaces of the filler particles, wherein the filler particles are distributed in the second mixture so at least 60% of the luminescent particles are separated from other luminescence particles by at least a distance of 7 nanometers, and
obtaining a third mixture by mixing the second mixture with a polymeric material comprising a material of the group of polysiloxanes.