Lighting device for projecting a beam of light

• US 20080101062A1
• Filed: 07/24/2007
• Published: 05/01/2008
• Est. Priority Date: 10/27/2006
• Status: Abandoned Application

• Current Assignee: Hong Kong Applied Science And Technology Research Institute Co., Ltd.
• Original Assignee: Hong Kong Applied Science And Technology Research Institute Co., Ltd.
• Inventors: Cai, Yong, Zheng, Shengmei, Feng, Jian, Chu, Hung-Shen
• Application Number:
  US11/881,039
• Publication Number:
  US 20080101062A1
• Time in Patent Office: Days
• US Class Current: 362/231
• CPC Class Codes: F21K 9/68 Details of reflectors forming part of the light source
• CPC Class Codes: F21V 7/005 with an elongated shape to cooperate with linear light sources
• 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 33/38 with a particular shape
• CPC Class Codes: H01L 33/486 adapted for surface mounting
• CPC Class Codes: H01L 33/60 Reflective elements
• CPC Class Codes: H01L 33/62 Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls

Abstract

A light source for a lighting device has a reflector for receiving one or more light emitting diode devices. The reflector has reflective sides and a light exit. There is a side emitting LED device located in the reflector such that its primary light emitting direction towards the reflective sides such that light emitted from the LED device are reflected towards the light exit.

Claims

1. A light source for a lighting device comprising:

a reflector for receiving one or more light emitting diode devices, said reflector having reflective sides and a light exit, and

a side emitting LED device located in the reflector and having its primary light emitting directions towards the reflective sides such that light emitted from the LED device are reflected towards the light exit.

2. The light source of claim 1 wherein the reflector is selected from a group consisting of a cup, dish, cone, or channel.

3. The light source of claim 2 wherein the reflector is a reflective channel for receiving an array of the side emitting LED devices.

4. The light source of claim 3 wherein the array of the side emitting LED devices comprises successive red, green and blue side emitting LED devices.

5. The light source of claim 3 further comprising a plurality of adjacent reflective channels, each channel receiving only a plurality of red or green or blue side emitting LED devices, wherein adjacent reflective channels have successive pluralities of red, green and blue side emitting LED devices.

6. The light source of claim 2 wherein the cup, dish, cone, or channel has a parabolic shaped inner surface having a reflective finish.

7. The light source of claim 1 wherein the reflector has a focal point and the side emitting LED device is mounted on a mounting device such that the light emitting region center is located adjacent the focal point.

8. The light source of claim 1 when used in a device for projecting a bean of light from the device.

9. A lighting device for projecting a bean of light, comprising:

a light reflector having a mounting surface surrounded by parabolic shaped reflective sides and a light exit, and

a light emitting diode devices fabricated for mounting to the mounting surface with a plane occupied by light emitting regions of the devices substantially perpendicular to a plane occupied by the mounting surface such that light emissions of the light emitting regions are projected towards the parabolic sides of the reflector are reflected towards the light exit.

10. The lighting assemble of claim 9 wherein the light reflector has a focal point and the light emitting diode is located adjacent the focal point so that light projected towards the parabolic sides of the reflector is reflected towards the light exit in a highly collimated light beam.

11. A light source for a lighting device, comprising:

a light reflector having a mounting surface surrounded by reflective sides and a light exit, for receiving one or more light emitting diode device, and

light emitting diode devices fabricated for mounting to the mounting surface with the plane occupied by light emitting regions of the devices substantially perpendicular to the plane occupied by the mounting surface such that light emissions of the light emitting regions are projected towards the reflective sides of the reflector are reflected towards the light exit.