LED spotlight having a funnel-shaped lens

• US 7,985,015 B2
• Filed: 05/25/2005
• Issued: 07/26/2011
• Est. Priority Date: 07/14/2004
• Status: Active Grant

• Current Assignee: Tridonic Optoelectronics GmbH
• Original Assignee: Tridonic Optoelectronics GmbH
• Inventors: Pachler, Peter, Hoschopf, Hans, Tasch, Stefan
• Primary Examiner(s): Lee; Jong-Suk (James)
• Assistant Examiner(s): Neils; Peggy A.
• Application Number:
  US11/632,096
• Publication Number:
  US 20070279904A1
• Time in Patent Office: 2,253 Days
• Field of Search: 362/555, 362/558, 362/247, 362/327, 362/309, 362/299, 362/310, 362/296.09, 362/311.02, 362/311.06, 362/311.11, 257/98
• US Class Current: 362/555
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 33/54 having a particular shape
• CPC Class Codes: H01L 33/58 Optical field-shaping elements
• CPC Class Codes: H01L 33/60 Reflective elements

Abstract

An LED spotlight has an arrangement having at least one LED, above which there is arranged a color conversion substance, and an optical system of a substantially transparent material, which directs incident light from the LED arrangement in the direction of an exit surface by means of total internal reflection. The base surface of the conical optical system may thereby have the shape of a polygon. The outer wall of the conical optical system may have at least in partial regions planar facets. The color conversion material may be provided in the shape of a cuboid above the LED arrangement.

Claims

1. LED spotlight, comprising;

an LED arrangement having at least one LED, above which there is arranged a color conversion substance, and

a conical optical system of a substantially transparent material, said conical optical system having an outer surface and an exit surface, and said conical optical system defining an axis of symmetry,

wherein the LED arrangement is so arranged with reference to the conical optical system that a part of light emitted from the LED arrangement is incident directly on the outer surface of the conical optical system and from there is directed in the direction of the exit surface by means of total internal reflection, which another part of the light from the LED arrangement passes directly to the exit surface without reflection, and

wherein the outer surface forms an angle with the axis of symmetry that decreases in value while the distance from the LED arrangement increases.

2. LED spotlight according to claim 1, wherein the base surface of the conical optical system has the shape of a polygon.

3. LED spotlight according to claim 1, wherein the outer wall of the conical optical system has at least in partial regions planar facets.

4. LED spotlight according to claim 1, wherein the color conversion material is provided in the shape of a cuboid above the LED arrangement.

5. LED spotlight according to claim 1, wherein the LED arrangement has a plurality of LEDs of the same color.

6. LED spotlight according to claim 1, wherein the LED arrangement is emplaced flush in a carrier which forms a base surface of the conical optical system.

7. LED spotlight according to claim 1, wherein the outer wall of the conical optical system has at least two circular arc regions which in each case comprises planar facets inclined with respect to the axis of symmetry of the conical optical system.

8. LED spotlight according to claim 1, wherein the outer surface of the conical optical system is at least partially mirrored.

9. LED spotlight according to claim 8, wherein, the conical optical system is mounted in the region of the mirroring.