Led encapsulant

Patent metadata

Field	Value
Publication number	US-2016254425-A1
Application number	US-201415030079-A
Country	US
Kind code	A1
Filing date	Oct 24, 2014
Priority date	Oct 24, 2013
Publication date	Sep 1, 2016
Grant date	—

Abstract

An LED encapsulant comprises a scattering particle mixture, which includes:
(i) a linear polymer including a dimethylsiloxane group which has a vinyl end substituent and/or a linear polymer including a methylphenylsiloxane group which has a vinyl end substituent; and (ii) at least one vinyl-based resin selected from the group consisting of a vinyl-based ViMQ resin. An LED package comprising the encapsulant is also disclosed.

First claim

1 .- 14 . (canceled)

15 . An LED encapsulant comprising a scattering particle mixture, which comprises components (i) and (ii):
(i) a linear polymer including a dimethylsiloxane group and/or a linear polymer including a methylphenylsiloxane group and/or a diphenylsiloxane group, the linear polymers having at least one vinyl end substituent; and (ii) at least one silicone resin of one of structures M Vi D H D Ph T Ph , M Vi M H D Ph T Ph , M Vi D H T Ph , M Vi M H T Ph , or M Vi (D)T Ph
wherein if (i) acts as silicone matrix then (ii) acts as scattering particles and if (ii) acts as silicone matrix then (i) acts as scattering particles.

16 . The LED encapsulant comprising a scattering particle mixture of claim 15 , wherein at least one of the components is included as scattering particles while another one or more components is included as a silicone matrix.

17 . The LED encapsulant of claim 15 , further comprising a surfactant having a (CH 3 ) 2 Si—O structure and a (CH 3 )PhSi—O structure.

18 . The LED encapsulant of claim 17 , wherein, when a portion of the surfactant having a (CH 3 ) 2 Si—O structure is defined as A and a portion of the surfactant having a (CH 3 )PhSi—O structure is defined as B, the surfactant has an ABA, BAB, or AB structure.

19 . The LED encapsulant of claim 15 , further comprising a crosslinking agent.

20 . The LED encapsulant of claim 15 , further comprising a curing inhibitor, a catalyst and a fluorescent substance.

21 . The LED encapsulant of claim 15 , which further comprises nanoparticles.

22 . The LED encapsulant of claim 20 , which further comprises at least one particulate selected from the group consisting of TiO 2 , ZnO, and silica.

23 . The LED encapsulant of claim 22 , wherein the sum of the contents of TiO 2 , ZnO, and silica particulates is from 0.05 to 5 wt % based on the total weight of scattering particles.

24 . The LED encapsulant of claim 23 , wherein the average particle size of the TiO 2 , ZnO, and silica particulates is between 1 and 50 nm.

25 . The LED encapsulant of claim 17 , wherein the surfactant comprises at least one compound selected from the group consisting of vinyltrimethoxysilane, methacryloxymethylmethyldimethoxysilane, methacryloxymethyltriethoxysilane, 3-methacryloxypropyltrimethoxysilane, methyltriethoxysilane, allyltriethoxysilane, octyltriethoxysilane and tetraethoxysilane.

26 . An LED package comprising:
an LED chip; and the LED encapsulant of claim 15 .

27 . The LED package of claim 26 , wherein the LED chip emits blue light when current is applied.

28 . The LED package of claim 26 , which further comprises a yellow fluorescent substance.

29 . The LED package of claim 27 , which further comprises a yellow fluorescent substance.

Assignees

• Wacker Chemie Ag

Inventors

• Chung Kyuha
• Kang Doo Jin
• Kim Chang Sic
• Kim Kyung-Hak
• Park Jihye
• Kim Youngjin

Classifications

• C08K5/56

  Organo-metallic compounds, i.e. organic compounds containing a metal-to-carbon bond · CPC title

• C08K3/013

  Fillers, pigments or reinforcing additives · CPC title

• C08L83/00

  Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers · CPC title

• C08L83/04 Primary

  Polysiloxanes · CPC title

• H10H20/8512

  Wavelength conversion materials · CPC title