Analysis of LED energy saving application theory

(I) LED structure

LED is the full name of the light-emitting diode, which is made of phosphorus, arsenic, nitrogen and other compounds of the diode, when the electrons and holes can be combined when exposed to visible light. For the LED lamp, the core part of the utility model is a semiconductor chip which is fixed on the wedge bracket, and the two ends of the wedge bracket are connected with the positive pole of the power supply, and the lead frame is connected with the negative pole of the power supply.

The semiconductor chip is made up of three parts:

(1) type P semiconductor component, which is usually welded on the lead frame connected to the positive pole of the power supply;

(2) type N semiconductor component, which is usually welded on the lead frame connected to the negative pole of the power supply;

(3) section PN, the transition layer between the P type semiconductor module and the N type semiconductor component.

In addition, the use of epoxy resin containing two or more epoxy groups on the above three parts are closed, which can constitute a LED lamp.

Analysis of LED energy saving application theory

(two) LED luminescence principle

LED is actually part of the semiconductor diode, relying on its ability to achieve the conversion of electric energy to light energy. Light emitting diodes also have a common diode unidirectional conductivity. When the light emitting diode forward voltage is introduced after injected into the N region from the P area of the hole and from area N to area P injected electrons in the PN junction near a few microns in electronic and P zone N of the composite hole will appear, after the spontaneous emission of fluorescence. Special attention is paid to different semiconductor materials, there is a great difference between the electron and hole energy state, the combination of electron and hole energy released during the number of wavelengths of light emitted by the negative correlation, namely the combination of electron and hole release less energy is emitted light wavelength is longer; the more energy and the recombination of electrons and holes when released, then the light emitted by the wavelength is shorter.

(three) characteristics of LED

Compared with the common diode, the characteristic of LED is more obvious, which is as follows: the working current is small and the working voltage is low, the service life is relatively long, and the shock resistance and the seismic performance are good. LED is the existence of these characteristics are used as a light source or signal display.

(four) classification of LED

On the standard basis of LED can be divided into many kinds, including ordinary monochromatic light emitting diode, high brightness light-emitting diodes, light emitting diode, color high brightness light-emitting diodes, light emitting diodes and voltage controlled negative resistance light emitting diode. The ordinary monochromatic light emitting diode is most commonly used, the reason is that the ordinary monochromatic light emitting diode as the current control type semiconductor device, not only small current and low voltage, small volume, and fast response speed, stable luminescence is relatively uniform. At the same time, the luminous wavelength determines the luminous color of the ordinary monochromatic light-emitting diode, and the luminous wavelength is closely related to the semiconductor material used in the manufacture of the light-emitting diode.