Dual LED point-source assembly

a point-source assembly and led technology, applied in semiconductor devices for light sources, lighting and heating apparatus, lighting applications, etc., can solve the problems of insufficient lumens or candlepower to meet the 3-4 mile visibility requirement, leds are not without problems, and are not easy to damag

Inactive Publication Date: 2006-06-08
AUTOMATIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0018] One aspect of the present invention is a lighting device comprising: (a) a single stack of two LED modules; (b) each LED module having an LED, an LED lens and an LED mount made of a thermally conductive material to conduct heat away

Problems solved by technology

As a result, they are highly susceptible to damage due to temperature variations and vibrations.
LEDs, however, are not without their problems.
A first problem is that typical, low-output, 5 millimeter LEDs (currently available in lighting devices such as those used for marine and airport safety lights) only have a driving current ranging from about 50 to 70 milliwatts and produce insufficient lumens or candlepower to meet the 3-4 mile visibility requirement.
Although it is possible to increase the optical output considerably by increasing the forward current above the nominal rated value, s

Method used

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Examples

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Embodiment Construction

[0035] Several embodiments of the lighting device of the present invention are described in detail below. One embodiment of the present invention relates to a lighting device using high-flux light emitting diodes (LEDs) mounted on heat sinks facing each other and located in a conventional fresnel lens. High flux LEDs are defined herein as LEDs with driving current of about 1-5 Watts and having a high output of lumens. This embodiment is described below.

[0036] Referring now to the drawings, it is noted that like reference characters designate like or similar parts throughout the drawings. The figures, or drawings, are not intended to be to scale. For example, purely for the sake of greater clarity in the drawings, wall thicknesses and spacings are not dimensioned as they actually exist in the assembled embodiments.

[0037] As shown in FIG. 2,4,6, the preferred embodiment has two, side-emitting LEDs 91a,b facing each other with only LED lenses 99a,b between them. By having this orient...

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PUM

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Abstract

A lighting device having a dual LED point-source assembly containing two high flux LEDs mounted facing each other with LED lenses positioned between the LEDs. At least one heat sink is attached to one of the LEDs. The heat sinks serve to transfer heat from the LEDs to the outside environment. In one embodiment the lighting device is positioned within a fresnel lens to produce a horizontally uniform distribution of light.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application claims priority to pending U.S. Patent Application Ser. No. 60 / 634,306 (Attorney Docket Number APWR-P004V), filed Dec. 8, 2004 by inventors Alan Trojanowski and Jonathan Nickel and entitled “Dual LED Point-Source Assembly.”BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates generally to a light emitting diode (LED) lighting device. The present invention further relates to an LED assembly having a point-source of light to simulate an incandescent lamp. [0004] 2. Description of the Related Art [0005] Reliable safety lights are critical for the safety of boats to prevent accidental collisions during darkness and inclement weather. The vast majority of marine safety lights, such as the one disclosed in U.S. Pat. No. 5,711,591 issued to Jordan use incandescent light bulbs as the light source. [0006] A number of attempts have been made to replace marine filament bulbs with LEDs in...

Claims

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Application Information

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IPC IPC(8): F21V29/02F21V5/00
CPCB60Q1/2611B63B45/04B63B51/00F21V5/045F21V5/046F21W2111/04F21W2111/043F21W2111/06F21Y2101/02F21Y2115/10Y10S362/80
Inventor TROJANOWSKI, ALANNICKEL, JONATHAN
Owner AUTOMATIC POWER
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