Hermetically sealed illumination device with luminescent material and manufacturing method therefor

Patent metadata

Field	Value
Publication number	US-2016013374-A1
Application number	US-201414764216-A
Country	US
Kind code	A1
Filing date	Mar 26, 2014
Priority date	Mar 26, 2013
Publication date	Jan 14, 2016
Grant date	—

Abstract

An illumination device is manufactured by providing ( 101 ) a substrate ( 1 ) having a first side ( 1 a ), sealingly coupling ( 106 ) an at least partially light transmitting cover ( 2 ) to the substrate ( 1 ) such that an enclosed space ( 3 ) is defined by at least the first side ( 1 a ) of the substrate ( 1 ) and the cover ( 2 ), providing a through-hole ( 4 ) into the enclosed space ( 3 ), and introducing ( 107 ) a luminescent material into the enclosed space ( 3 ) via the through-hole ( 4 ). By hermetically sealing ( 108 ) the through-hole ( 4 ) after the introduction of the luminescent material, the enclosed space ( 3 ) becomes sealed and hence luminescent materials being relatively sensitive to e.g. water and/or oxygen become protected from exposure to the environment.

First claim

1 . A method for manufacturing an illumination device, the method comprising:
providing a substrate having a first side provided with a light source; providing an at least partially light transmitting cover sealingly coupled to the substrate such that a chamber is defined by at least the first side of the substrate and the cover; providing a through-hole into the chamber; introducing a luminescent material into the chamber via the through-hole such that a layer of luminescent material is provided on at least a portion of an inner surface of the cover; and sealing the through-hole after the introduction of the luminescent material.

2 . The method according to claim 1 , further comprising forming capillary grooves on the inner surface of the cover prior to introducing the luminescent material into the chamber.

3 . The method according to claim 1 , wherein providing the at least partially light transmitting cover sealingly coupled to the substrate comprises sealingly coupling the at least partially light transmitting cover to a thermally conductive element which is sealingly coupled to the substrate, wherein the chamber is further defined by the thermally conductive element.

4 . The method according to claim 1 , wherein providing an at least partially light transmitting cover sealingly coupled to the substrate comprises sealingly coupling a thermally conductive element integrally formed with the at least partially light transmitting cover to the substrate, wherein the chamber is further defined by the thermally conductive element.

5 . The method according to claim 1 , wherein providing an at least partially light transmitting cover sealingly coupled to the substrate comprises sealingly coupling a thermally conductive element integrally formed with the substrate to the at least partially light transmitting cover, wherein the chamber is further defined by the thermally conductive element.

6 . The method according to claim 1 , further comprising providing an at least partially light transmitting envelope sealingly coupled to the substrate such that the at least partially light transmitting cover is at least partially enclosed by the at least partially light transmitting envelope.

7 . The method according to claim 1 , wherein the substrate further has a second side, wherein the through-hole is provided in the substrate so as to extend from the first side of the substrate to the second side of the substrate.

8 . The method according to claim 3 , wherein the through-hole is provided in the thermally conductive element.

9 . A device comprising:
a substrate having a first side provided with a light source; an at least partially light transmitting cover sealingly coupled to the substrate such that an chamber is defined by at least the first side of the substrate and the cover; and a sealed through-hole into the chamber, the through-hole arranged to permit introduction of a luminescent material into the chamber, before the through-hole is sealed.

10 . An illumination device comprising:
a substrate having a first side provided with a light source; an at least partially light transmitting cover sealingly coupled to the substrate such that an chamber is defined by at least the first side of the substrate and the cover; and a luminescent material included within the wherein the luminescent material is provided in a layer on at least a portion of an inner surface of the at least partially light transmitting cover; wherein the illumination device further comprises a sealed through-hole into the, wherein the is sealed by the through-hole, the through-hole arranged to permit introduction of the luminescent material into the chamber before the through-hole is sealed.

11 . The illumination device according to claim 10 , wherein a phosphor layer is provided on the at least partially light transmitting cover.

12 . The illumination device according to claim 10 , wherein at least one of the layers comprising the luminescent material and the phosphor layer is arranged such that the illumination device emits light of different colors via different regions of the at least partially light transmitting cover.

13 . The illumination device according to claim 11 , wherein the phosphor layer is provided on an outer surface of the at least partially light transmitting cover.

14 . The method according to claim 1 , wherein the substrate further has a second side, wherein the through-hole is provided in the substrate so as to extend from the second side of the substrate to the first side of the substrate.

Assignees

• Koninkl Philips Nv

Inventors

• Dijken Durandus Kornelius
• Lunz Manuela
• Jagt Hendrik Johannes Boudewijn

Classifications

• H10W90/00

  Package configurations · CPC title

• F21K9/64

  using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer · CPC title

• F21K9/90

  Methods of manufacture · CPC title

• H10H20/8583

  not being in contact with the bodies · CPC title

• H10H20/8516

  having a non-uniform spatial arrangement or non-uniform concentration, e.g. patterned wavelength conversion layer or wavelength conversion layer with a concentration gradient · CPC title