How Do Downlights Emit Light?

The reason why the downlight is luminous is naturally due to its principle, what is the principle of downlight? Today we will explore it.

How do downlights emit light?

LED downlight is the application of new LED lighting source in the traditional downlight based on the improved development of products, and traditional downlight comparison has the following advantages: energy saving, low carbon, long life, good color rendering, fast response time.

The light-emitting principle of downlight: the terminal voltage of PN junction constitutes a certain potential barrier, and when the positive bias voltage is added the potential barrier drops, and most carriers in P and N regions diffuse to each other. As the electron mobility than the hole mobility is much larger, so there will be a large number of electrons to the P region diffusion, constituting a minority of the P region carrier injection. These electrons and the valence band of the hole complex, complex energy obtained in the form of light energy released. This is the principle of PN junction luminescence.

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