The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 14, 2019
Filed:
Sep. 24, 2013
Lumileds Llc, San Jose, CA (US);
Marcel Rene Bohmer, Eindhoven, NL;
Roelof Koole, Eindhoven, NL;
Patrick John Baesjou, Eindhoven, NL;
Rifat Ata Mustafa Hikmet, Eindhoven, NL;
LUMILEDS LLC, San Jose, CA (US);
Abstract
The invention provides a process for the production of a wavelength converter containing a siloxane polymer matrix with wavelength converter nano particles embedded therein, the process containing (a) mixing (i) a first liquid containing (i1) short chain siloxane polymers and (i2) wavelength converter nano particles having an outer surface grafted with siloxane grafting ligands and (ii) curable siloxane polymers, and (b) curing the curable siloxane polymers, thereby producing the wavelength converter (); wherein the short chain siloxane polymers have s1 Si backbone elements, wherein the siloxane grafting ligands comprise siloxane grafting ligands having x1 Si backbone elements, wherein at least one Si backbone element of each siloxane grafting ligand comprises a group having a grafting functionality; and wherein the curable siloxane polymers have y1 Si backbone elements, wherein x1/s1≥0.8, s1<y1 and wherein x1<y1.