Three color LED bulb

• US 7,275,839 B2
• Filed: 04/05/2005
• Issued: 10/02/2007
• Est. Priority Date: 04/05/2005
• Status: Expired due to Fees

• Current Assignee: OSRAM Sylvania Inc. (Ams-Osram AG)
• Original Assignee: OSRAM Sylvania Inc. (Ams-Osram AG)
• Inventors: Tucker, Michael, Tessnow, Thomas, Coushaine, Charles M.
• Primary Examiner(s): Husar; Stephen K.
• Assistant Examiner(s): Dunwiddie; Meghan K.
• Application Number:
  US11/098,812
• Publication Number:
  US 20060220990A1
• Time in Patent Office: 910 Days
• Field of Search: 362/39, 362/227, 362/231, 362/496, 362/500, 362/543, 362/545, 362/800, 362/511, 362/555
• US Class Current: 362/231
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21K 9/61 using light guides
• CPC Class Codes: F21S 43/14 Light emitting diodes [LED]
• CPC Class Codes: F21V 29/70 characterised by passive heat-dissipating elements, e.g. heat-sinks
• CPC Class Codes: F21V 29/89 Metals
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

The multi-color light lamp has a base divided into a plurality of segments. The three segments are spaced at 120 degrees. More or less segments can be used. An LED is positioned in each segment, the LED in each segment emits a color distinct from the light emitted by the LEDs in the other segments. If the lamp is to be used for automotive purposes, the LED in a first segment emits red light as a taillight and a stop light, the LED in a second segment emits yellow light a turn signal lamp, and the LED in the third segment emits white light as a backup light. A light pipe is operatively associated with the LEDs in each segment for directing emitted light away from the base. The LEDs (preferably two per segment) are mounted upon a thermally efficient printed circuit board such as a flex-on aluminum board.

Claims

1. A multi-color light emitting lamp comprising:

a base divided into three segments and including a central mounting aperture having a fastener, said fastener being affixed to a vehicle body;

at least one LED operatively positioned in each segment, the at least one LED in each segment emitting light in a color distinct from the light emitted by the at least one LED in the other segments;

said LEDs being mounted upon a thermally efficient printed circuit board;

a first of said LEDs emitting red light, a second of said LEDs emitting yellow light and a third of said LEDs emitting white light; and

a light pipe operatively associated with the at least one LED in each segment for directing emitted light away from said base.

2. The multi-color light emitting lamp of claim 1 wherein an optical plate is provided over said segments.

3. The multi-color light emitting lamp of claim 1 wherein said base includes a plurality of peripherally located mounting apertures.

4. The multi-color light emitting lamp of claim 3 wherein said base includes a center-mounted infra-red source.