LIGHT EMITTING DEVICE

• US 20110198655A1
• Filed: 10/08/2009
• Published: 08/18/2011
• Est. Priority Date: 10/17/2008
• Status: Active Grant

• Current Assignee: Koninklijke Philips N.V.
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Schug, Josef A., Sikkens, Marten, De Graaf, Jan
• Granted Patent: US 8,513,691 B2
• Time in Patent Office: Days
• US Class Current: 257/98
• CPC Class Codes: H01L 33/60 Reflective elements

Abstract

The present invention relates to a light emitting device (100) comprising at least one light emitter (101), a substrate (102) and a reflective optic housing (103,108), the space between the reflective optic housing (103,108) and the one or more light emitters (101) being filled at least partly by a suspension of a reflective material (104), in order to increase the light output from the light emitter(s) (101).

Claims

1. A light emitting device comprising at least one light emitter arranged on a substrate and a reflective optic housing at least partly laterally surrounding said at least one light emitter, wherein a space between said reflective optic housing and said at least one light emitter is filled at least partly by a suspension of a reflective material.

2. A light emitting device according to claim 1, further comprising at least one channel suitable for application of said reflective material.

3. A light emitting device according to claim 2, wherein said channel is formed in said reflective optic housing, said substrate or an intersection between an interface of the substrate and the reflective optic housing.

4. A light emitting device according to claim 1, wherein said reflective optic housing is white-reflective, specularly reflective or any combinations thereof.

5. A light emitting device according to claim 1, wherein said reflective optic housing constitutes a collimator, a concentrator, a color and/or light mixer or any combinations thereof.

6. A light emitting device according to claim 1, wherein said reflective material comprises TiO₂.

7. A light emitting device according to claim 1, wherein said reflective material extends from said substrate to at least 50% of a height of said light emitter.

8. A light emitting device according to claim 1, wherein said light emitting device comprises at least one thin film flip chip (TFFC) die.

9. A method for the manufacture of a light emitting device, comprising:

providing a substrate on which at least one light emitter is arranged;

arranging a reflective optic housing at least partly laterally surrounding said at least one light emitter;

filling a space between said reflective optic housing and said at least one light emitter at least partly with a suspension of a reflective material.

10. A method according to claim 9, further comprising curing of said reflective material.

11. A method according to claim 9, wherein the filling is performed by injecting said reflective material through a channel in said reflective optic housing.

12. A method according to claim 9, wherein said reflective material is dispersed into the space between said reflective optic housing and said at least one light emitter by capillary force.