Wavelength Conversion Body And Method For Manufacturing Same

• US 20140166902A1
• Filed: 06/25/2012
• Published: 06/19/2014
• Est. Priority Date: 08/01/2011
• Status: Abandoned Application

• Current Assignee: OSRAM GmbH (Ams-Osram AG)
• Original Assignee: OSRAM GmbH (Ams-Osram AG)
• Inventors: Berben, Dirk, Hartwig, Ulrich, Jermann, Frank, Morgenbrod, Nico
• Application Number:
  US14/236,593
• Publication Number:
  US 20140166902A1
• Time in Patent Office: Days
• US Class Current: 250/458.1
• CPC Class Codes: F21K 9/64 using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
• CPC Class Codes: F21V 13/08 the elements being filters or photoluminescent elements and reflectors
• CPC Class Codes: F21V 9/30 Elements containing photoluminescent material distinct from or spaced from the light source shades F21V1/17; globes, bowls or cover glasses F21V3/08, F21V3/12; refractors F21V5/10; reflectors F21V7/26, F21V7/30; elements with provision for controlling the spectral properties or intensity F21V9/40
• CPC Class Codes: Y10T 29/49826 Assembling or joining

Abstract

A wavelength conversion body (1; 11) for generating wavelength-converted light (S) from primary light (P) shone into the wavelength conversion body (1; 11), comprising: a light guide body (2; 12) which is optically transmissive for the primary light (P) and the wavelength-converted light; (S), and at least one phosphor body (6; 16) having a phosphor, wherein the light guide body (2; 12) is monolithically connected to the at least one phosphor body (6; 16).

Claims

1. A wavelength conversion body for generating wavelength-converted light from primary light shone into the wavelength conversion body, comprising:

a light guide body which is optically transmissive for the primary light and the wavelength-converted light; and

at least one phosphor body having a phosphor,

wherein the light guide body is monolithically connected to the at least one phosphor body.

2. The wavelength conversion body as claimed in claim 1, wherein:

the light guide body has a light entry surface for entry of the primary light and a light exit surface for exit at least of the wavelength-converted light, and

the at least one phosphor body is arranged optically downstream of the light entry surface.

3. The wavelength conversion body as claimed in claim 2, wherein the light entry surface and the light exit surface coincide at least in regions, and at least one phosphor body is arranged opposite the light entry surface.

4. The wavelength conversion body as claimed in claim 1, wherein the at least one phosphor body is covered with a specularly or diffusely reflective cover.

5. The wavelength conversion body as claimed in claim 1, wherein the light guide body and the at least one phosphor body are or contain garnet-based bodies.

6. The wavelength conversion body as claimed in claim 1, wherein the light guide body is a ceramic light guide body, and the at least one phosphor body comprises at least one ceramic phosphor body.

7. The wavelength conversion body as claimed in claim 6, wherein the light guide body and the at least one phosphor body are bodies cleaved to one another.

8. The wavelength conversion body as claimed in claim 6, wherein the light guide body and the at least one phosphor body are sintered bodies sintered together.

9. The wavelength conversion body as claimed in claim 6, wherein the light guide body and the at least one phosphor body are or contain nitride-based bodies.

10. The wavelength conversion body as claimed in claim 9, wherein at least the light guide body consists of or contains sialon.

11. The wavelength conversion body as claimed in claim 1, wherein at least one phosphor comprises Eu, Ce, Yb, Mn and/or Nd.

12. A method for producing a wavelength conversion body as claimed in claim 7, wherein the method comprises the following steps:

producing the light guide body;

producing the at least one phosphor body;

smoothing a respective contact surface of the light guide body and of the at least one phosphor body; and

bringing the light guide body and the one phosphor body together on their contact surfaces.

13. A method for producing a wavelength conversion body as claimed in claim 8, wherein the method comprises the following steps:

introducing a slip of a green body of the light guide body or of the phosphor body into a mold;

subsequently introducing a slip of a green body of the respective other body (6, 2;

16, 12) into the mold; and

sintering the combined green body.