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What's the working principle of the LED light by floodlights lsd





What's the working principle of the LED light by
Article Posted: 08/19/2013
Article Views: 167
Articles Written: 370
Word Count: 432
Article Votes: 0
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What's the working principle of the LED light


 
Advice,Electronics,Writing
LED light-emitting principle and main arguments

1. LED light-emitting principle

The LED is a kind of the electron diode, the main structure is a PN junction. Figure 1, when the voltage is applied to the both end of the LED, electrons absorb the energy to turn to the valence electron band, and then release the energy absorbed, the energy released is light. The wavelength of light emitted and the color is determined by the electric potential difference between the semiconductor decision.

The LED has similar characteristics of the general silicon diode, a voltage is applied between the positive and negative. When the applied voltage reaches a critical value, LED current is generated, start emitting light. When the voltage exceeds this threshold, the current increases dramatically. The threshold voltage of the white LED approximately 3.5V. the threshold voltage values of the Red, green, and blue LED is shown in Table 1.

We use circuit simulation to illustrate the electrical properties and the drive circuit of the LED. The circuit simulation is a simple method that the electronic design of the LED and resistance is modeled and the computer simulates the operation of the circuit. Here is Cadence's circuit simulation PSpiceA / D. While using the Philips Lighting Company's LUXEON series LX3-PW71.

First, using the circuit of Figure 2 to verify the electronic properties of the LED. To get the voltage - current characteristics, the need for direct analysis.

Verify LXM3-PM71 voltage - current characteristic results showed that: in the case of 354mA,the current is about 3.0V

Meanwhile,there are a large number of excellent manufacturer engaging in manufacturing and researching the LED light,of which the lead lighting is just one,lead Lighting adopts high brightness SMD as the light source of the LED tube and highly integrated and high brightness COB as the light source of the LED flood light, which fully guaranteed stability and soft light of the LED tube light and octahedron breadth and brightness irradiation range of the LED flood light, while the low voltage constant current driver convert the AC into DC so that improve energy efficiency of the LED tube light and LED flood light and reduce the waste heat energy and stroboscopic effect exciting the human eye, the most important is that the LED lighting without adding mercury and other heavy metals harmful to our body and pollution the environment, that’s why the LED light is famous for energy-saving and environmental protection ,login www.ledclan.com to learn more features and uses of the LED tube light and surf www.lead-lighting.com to know more awesome LED floodlights and other LED lighting.

Related Articles - difference, circuit simulation, electric potential, LED flood light, Philips, PN junction, silicon diode, threshold voltage, tube light, voltage - cur,

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