Light emitting device including reflective optic housing at least partially filled with reflective material

• US 8,513,691 B2
• Filed: 10/08/2009
• Issued: 08/20/2013
• Est. Priority Date: 10/17/2008
• Status: Expired due to Fees

• Current Assignee: Koninklijke Philips N.V.
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: De Graaf, Jan, Sikkens, Marten, Schug, Josef A.
• Primary Examiner(s): Jahan, Bilkis
• Application Number:
  US13/124,401
• Publication Number:
  US 20110198655A1
• Time in Patent Office: 1,412 Days
• Field of Search: 257/98, 257/99, 257/100, 257/E33.001, 257/E33.072
• 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,

a reflective optic housing disposed on said substrate at least partly laterally surrounding said at least one light emitter, and

at least one channel formed between said substrate and said reflective optic housing, said channel connecting a space formed between said reflective optic housing and said at least one light emitter with an exterior of the reflective optic housing,

wherein said space is at least partially filled a suspension of reflective material, and

wherein said channel is shaped and dimensioned for delivering said suspension to said space by a capillary force.

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

3. 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.

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

5. 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.

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