LYCOS RETRIEVER 
Light-Emitting Diode: Light Emitting Diode
built 636 days ago
Light emitting diode (LED) lights have three public lighting applications: traffic lights, park and carpark lighting, and street lights. LEDs have been used in traffic lighting for some time, but their application to park, carpark and street lighting is a recent development.
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LumaLite, Inc. of Spring Valley Calif. has invented a Light Emitting Diode curing light, brand named the LumaCure. This light is comprised of 7 Light Emitting Diodes which produce, in ideal circumstances, 35 milliwatts of optical curing energy which is insufficient to hit the threshold of 100 milliwatts and as a result does not cure dental composites. Dental/Medical Diagnostic Systems, Inc. of Wookland Hills, Calif. has invented a Light Emitting Diode curing light that contains over 60 Light Emitting Diodes... the device is incapable of dissipating the 4500 milliwatts of thermal energy produced for more than a few seconds, therefore, the device has been found in dentistry to be of little clinical value. Inventor John Kennedy has invented several designs (U.S. Pat. Nos.: 5,420,768, / 5,420,768 / 5,233,283) of Light Emitting Diode dental curing lights.
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In an electronics circuit a light emitting diode behaves very much like any other diode. As they are often used to indicate the presence of a voltage at a particular point, often being used as a supply rail indicator. When used in this fashion there must be a current limiting resistor placed in the circuit. This should be calculated to give the required level of current. For many devices a current of around 20 mA is suitable, although it is often possible to run them at a lower current. If less current is drawn the device will obviously be dimmer.
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Light Emitting Diode Light Sources for Dental Curing are disclosed. Some embodiments of the invention include structures such as Light Emitting Diode Array(s), heat sink, heat dissipation, heat pipe, and control circuitry are disclosed.
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An LED (light emitting diode) is an electro–chemical light source. When the diode is forward–biased, light is generated. The light is monochromatic; the colour is dependent on the materials used. White light can be produced by using phosphors similar to those used in fluorescent and coated HID lamps.
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As light emitting diode (LED) technology becomes more advanced, products deploying it are becoming more visible in the truck market. Major LED lighting manufacturers for commercial vehicles such as Grote, Peterson, and Truck-Lite are releaseing more products using the technology than ever before. They attribute LED lamps’ longer life, durability, and light quality as reasons they will displace incandescent lights in many applications as time goes on.
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Light Emitting Diode