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The Light Source of LED Panel Light From:www.lgiled.com   Reporter:pamela   Date:2013/10/24 19:58:16   Tags:led-emergency-downlight

LED is an abbreviated name of light emitting diode (LED). The led panel light basic structure is an electroluminescent semiconductor materials, placed on a wire rack, then sealed with epoxy resin around, protect the internal core wire role, so the LED's seismic performance.

LED light-emitting diode is the core of a p-type semiconductor and n-type semiconductor chip formed in the p-type semiconductor and an n-type semiconductor between a transition layer, called the pn junction. In some semiconductor materials, PN junction, the injection of minority carrier and majority carrier recombination, when will the excess energy released in the form of light, which converts electrical energy directly into light energy. PN junction reverse voltage, minority carrier injection is difficult, it is not light.

This use of injection electroluminescent diodes called the principle of making light-emitting diodes, commonly known as LED. When it is working, current flows from the LED anode to the cathode, the semiconductor crystals from the ultraviolet to the infrared light of different colors. Light intensity was related with the current.

Second, LED light source characteristics

1. Voltage: LED using low voltage power supply, power supply voltage between 6-24V, varies depending on the product, so it is a more secure than using a high voltage power supply, especially for public places.

2. Performance: consumption of energy compared with incandescent light efficiency 80% reduction

3. Applicability: small, small piece of each unit LED 3-5mm square, it can be prepared into various shapes of devices, and for the environment variable

4. Stability: 100,000 hours, the light fades to the initial 50%

5. Response time: the incandescent millisecond response time, LED lights nanosecond response time

6. Environmental pollution: no harmful metal mercury

7 Color: change the current color, light-emitting diodes by chemical modification methods to easily adjust the material's band structure and band gap, to achieve multi-color light, orange, red, yellow and blue. Such as small current when the red LED, as the current increases, you can turn to orange, yellow, and finally to green 8 Price: LED's price is expensive, compared to incandescent lamps, the price of a few with LED The price is quite an incandescent lamp, and often each signal to be 300 ~ 500 diodes.

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