Optical disk for lighting module

• US 8,188,486 B2
• Filed: 09/16/2008
• Issued: 05/29/2012
• Est. Priority Date: 09/16/2008
• Status: Expired due to Fees

• Current Assignee: OSRAM Sylvania Inc. (Ams-Osram AG)
• Original Assignee: OSRAM Sylvania Inc. (Ams-Osram AG)
• Inventors: Lapatovich, Walter P., Hamby, David, Scotch, Adam, Selverian, John
• Primary Examiner(s): Ho, Anthony
• Application Number:
  US12/211,325
• Publication Number:
  US 20100067241A1
• Time in Patent Office: 1,351 Days
• Field of Search: 257/79, 257/98, 257/99, 257/100
• US Class Current: 257/79
• CPC Class Codes: C09K 11/02 Use of particular materials as binders, particle coatings or suspension media therefor
• CPC Class Codes: C09K 11/08 containing inorganic luminescent materials
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 33/501 characterised by the materials, e.g. binder
• CPC Class Codes: H01L 33/505 characterised by the shape, e.g. plate or foil
• CPC Class Codes: H01L 33/507 the elements being in intimate contact with parts other than the semiconductor body or integrated with parts other than the semiconductor body
• CPC Class Codes: Y02B 20/00 Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Abstract

An optical disk for use in converting light emitted from a light-emitting diode chip to white light. The optical disk includes a tapered surface such that a center area of the disk has a width greater than a width of an outer area of the disk. The optical disk is formed of a silicone having at least one weight percent mix of phosphor. Various embodiments of this generally described optical disk are also presented.

Claims

1. An optical disk for use in converting light emitted from a light-emitting diode chip to white light, comprising:

an upper surface, a lower surface, and a perimeter surface;

wherein the perimeter surface defines a diameter of the optical disk and an end thickness of the disk;

wherein the end thickness is about 1.0 mm;

wherein the diameter of the disk is about 3.0 mm; and

wherein the upper surface has a radius of curvature of about 9.0 mm.

2. The optical disk of claim 1, wherein the silicone is LSR-70.

3. The optical disk of claim 1, wherein the disk has a phosphor mix of between 1-10 weight percent.

4. An optical disk for use in converting light emitted from a light-emitting diode chip to white light, comprising:

an upper surface, a lower surface, and a perimeter surface;

wherein the perimeter surface defines a diameter of the optical disk and an end thickness of the disk;

wherein the end thickness is about 0.5 mm;

wherein the diameter of the disk is about 3.0 mm; and

wherein the upper surface has a radius of curvature of about 13 mm.

5. The optical disk of claim 4, wherein the silicone is LSR-70.

6. The optical disk of claim 4, wherein the disk has a phosphor mix of between 1-10 weight percent.

7. An optical disk for use in converting light emitted from an LED chip to white light, comprising:

an upper surface, a lower surface, and a perimeter surface;

wherein the perimeter surface defines a diameter of the optical disk and an end thickness of the disk;

wherein the end thickness is about 2.0 mm;

wherein the diameter of the disk is about 3.0 mm; and

wherein the upper surface has a radius of curvature of about 8.5 mm.

8. The optical disk of claim 7, wherein the silicone is LSR-70.

9. The optical disk of claim 7, wherein the disk has a phosphor mix of between 1-10 weight percent.