Incandescent light may be reborn?

The incandescent lamp to die right now, who would buy the incandescent light bulb, incandescent lamp with a leg approach death has entered the coffin, but in the microscopic field, an incandescent, is likely to be reborn.

Dr. Yue Kuo of Texas State University of agriculture and Chi-Chou, a doctoral student he had previously developed, is developing a new solid-state device based on the principle of incandescent light bulbs.

The device, like an incandescent lamp, is heated by a filament. Unlike ordinary incandescent lamps, however, the diameter of the filament is only 20-150 nm - and the bulbs are small, and they need to be manufactured in a semiconductor manufacturing facility.

To put it simply, this is a solid-state version of Edison's incandescent light bulb, which, according to inventors, can work more than 7 thousand hours without a break.

Kuo named the light bulb "solid incandescent LED", where the D is not the meaning of the diode, but the meaning of device equipment. In fact, the device can be viewed as a metal oxide semiconductor capacitor, the conductor and P type silicon sandwich made of a thin layer of amorphous insulating dielectric material. The upper part of the conductor is made of a transparent sheet (usually indium tin oxide) that allows light to pass through.

In order to make the equipment capable of emitting light, the researchers give equipment with high voltage, high voltage to dielectric materials can be decomposed in the middle, high voltage under the effect of dielectric material is transformed into a large number of small and long conductive filaments. Once the dielectric material is broken down, the current can flow through the filaments. Because the filament also has some resistance, the current flows through the heat, to a certain temperature began to shine, light and then through the transparent film to the outside world. Different from ordinary incandescent bulbs, these light sources come from thousands of small light spots.

Like incandescent lamps, incandescent LED is emitted by white light, the spectrum is very broad. This is very different with the traditional LED, because the wavelength of the light emitted from the LED range is very narrow, if you want LED to emit white light, you need a collocation coated fluorescent powder blue LED, or through the three RGB light bulbs emit white light mixed up.

When it comes to lighting, the most important factor to consider is the energy of the team, through the preliminary measurements show that less than 1% of the electricity was used to power the light emitting efficiency is very low, but Kuo hopes the luminous efficiency can exceed the traditional incandescent bulbs final equipment.

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