Ultraviolet radiation light emitting diode device

a light-emitting diode and ultra-violet radiation technology, which is applied in the field of ultra-violet radiation light-emitting diodes (leds), can solve the problems of low possible flow rate of disinfecting water, low uv power density of individual light sources, and difficulty in heat extraction from leds arranged in their respective geometries

Inactive Publication Date: 2011-04-21
TROJAN TECH
View PDF13 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This configuration enhances UV power density, improves heat extraction, and simplifies cleaning, achieving higher disinfection efficiency and longer device lifespan by maximizing light escape and heat dissipation, comparable to traditional mercury lamps.

Problems solved by technology

The disadvantage of the approaches taught by Jensen, Maiden and Betterly is the difficulty in achieving heat extraction from the individual LEDs arranged in their respective geometries.
A further disadvantage of the approaches taught by Jensen, Maiden and Betterly is the low UV power densities possible with individual light sources.
The low power density possible in a practical disinfection device such as that of Maiden results in low possible flow rates for disinfecting water.
Epoxy encapsulation for a UV LED is not feasible due to the fact that a conventional epoxy encapsulant is susceptible to degradation over time upon prolonged exposure to UV radiation.
No practical demonstration of these lamps is presented.
However, there are two problems with this statement.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Ultraviolet radiation light emitting diode device
  • Ultraviolet radiation light emitting diode device
  • Ultraviolet radiation light emitting diode device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031]A schematic for the basic structure of an ultraviolet (UV) light emitting diode (LED) 100 is illustrated in FIG. 1. It consists of layers 105,110 of a semiconductor material that are grown on an insulating substrate 115 that is transparent to emitted ultraviolet radiation. An active layer 107 is interposed between layers 105,110 of the semiconductor material.

[0032]The nature of the semiconductor material is not particularly restricted. Non-limiting examples of suitable semiconductor materials include GaN, InN, InGaN, AlInGaN, AlN, AlGaN and mixtures thereof. Throughout this specification, when reference is made to a specific semiconductor material, it is to be understood that this is for illustrative purposes only and should not be used to construe or limit the scope of the invention.

[0033]Typically, the insulating substrate may be constructed from sapphire (aluminum oxide). Metallic (or other electrically conductive) contacts are made for the negative (n) terminal 120, and th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

There is disclosed an ultraviolet radiation device. The device comprises a base portion, a plurality of semiconductor structures connected to the base portion and an ultraviolet radiation transparent element connected to the plurality of semiconductor structures. Preferably: (i) the at least one light emitting diode is in direct contact with the ultraviolet radiation transparent element, or (ii) there is a spacing between the at least one light emitting diode and the ultraviolet radiation transparent element, the spacing being substantially completely free of air. There is also disclosed a fluid treatment system incorporating the ultraviolet radiation device.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]The present application is a continuation of U.S. patent application Ser. No. 12 / 131,485, filed Jun. 2, 2008, now U.S. Pat. No. 7,842,932, issued Nov. 30, 2010, which claims the benefit under 35 U.S.C. ยง119(e) of provisional patent application Ser. No. 60 / 924,849, filed Jun. 1, 2007, the contents of all incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]In one of its aspects, the present invention relates to an ultraviolet radiation light emitting diode (LED) device. In another of its aspects, the present invention relates to a fluid treatment system comprising an ultraviolet radiation LED device.[0004]2. Description of the Prior Art[0005]Fluid treatment systems are known generally in the art.[0006]For example, U.S. Pat. Nos. 4,482,809, 4,872,980, 5,006,244, 5,418,370, 5,539,210 and Re:36,896 (all in the name of Maarschalkerweerd and all assigned to the assignee of the present invention) all de...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityApplications(United States)
IPC IPC(8): G21K5/00H01L33/40
CPCA23C3/076H01L33/405A61L2/10H01L2224/14
InventorKNIGHT, DOUGLAS G.FRASER, JIMSASGES, MICHAEL
OwnerTROJAN TECH