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Light emitting diode lamp with light pipes

A light guide and hollow tube technology, applied in the field of light sources, can solve problems such as increasing installation costs

Active Publication Date: 2005-12-28
OSRAM SYLVANIA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these LED sources are hardwired into their proper locations, which increases installation cost

Method used

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  • Light emitting diode lamp with light pipes
  • Light emitting diode lamp with light pipes
  • Light emitting diode lamp with light pipes

Examples

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Embodiment Construction

[0013] For a better understanding of the present invention and its other and further objects, advantages and capabilities, reference is made to the following description and appended claims taken in conjunction with the accompanying drawings.

[0014] Referring now to the drawings in more detail, FIG. 1 shows an LED light source 10 including a housing 12 having a base 14 . A hollow core 16 protrudes from the base 14 and is generally cylindrical and surrounded by a plurality of elongated hollow tubes 18 . The hollow core 16 and the bottom 14 are arranged around a longitudinal axis 19 . In the preferred embodiment of the invention, there are eight tubes 18; however, the actual number of tubes may depend on the light output of the individual LEDs, and the number of tubes may be reduced as the light output increases. printed circuit board 20 (see figure 2 ) is positioned within the base 14 and has a plurality of LEDs 22 operatively secured thereto. Each of the plurality of LEDs...

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Abstract

An LED light source has a housing with a bottom. A core protrudes from the bottom and is generally cylindrical and surrounded by a tube. The core and base are arranged about the longitudinal axis. The circuit board in the bottom supports the LEDs. Each LED and a tube are optically positioned one by one on one end of the core. A heat sink is positioned in thermally conductive relationship with the printed circuit board and a first reflector is attached to the other end of the core. To guide the light emitted by the LEDs from the light source to the reflector, the inside of the tube can be coated with a highly reflective material. In one embodiment, each tube mounts a light guide, each light guide extending from a location above one LED to a location near the reflector.

Description

technical field [0001] The present invention relates to light sources, and in particular to light sources employing light emitting diodes (one or more LEDs), and more particularly to light sources for the vehicular field such as headlights, taillights, parking lights, fog lights, cornering lights and the like. More particularly, the present invention relates to light sources packaged for industrially acceptable interchangeability. Background technique [0002] In the past, most vehicle light sources involved the use of incandescent bulb bodies. While operating well and at low cost, these bulbs have a relatively short life, and of course the thin filaments employed are always susceptible to damage due to vibrations. [0003] In recent years, certain applications in particular for parking lights have been replaced by LEDs. These solid state light sources have incredible lifetimes in the range of 100,000 hours and are not prone to vibration failures. However, these LED sourc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S8/10F21V29/503F21V29/74F21Y115/10
CPCF21S43/14F21S45/48
Inventor C·M·库谢恩M·塔克T·特斯诺
Owner OSRAM SYLVANIA INC
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