First, LED energy-saving application theory
(1) LED structure
The Chinese name for LED is called LED, and its diode is made of various compounds such as phosphorus, arsenic and nitrogen. When electrons and holes are combined, it can radiate visible light. For the LED lamp, the core part is a semiconductor wafer fixed on the wedge bracket and two lead ends connected to the positive pole of the power supply and one end connected to the negative pole of the power supply.
The semiconductor wafer consists of three parts:
(1) a P-type semiconductor component, that is, the component is usually soldered to a lead frame that is connected to the positive electrode of the power supply;
(2) an N-type semiconductor component, that is, the component is usually soldered to a lead frame that is connected to a negative pole of the power supply;
(3) A PN section, that is, a transition layer between a P-type semiconductor component and an N-type semiconductor component. Further, the above three portions are sealed by using an epoxy resin having two or more epoxy groups in the molecule, whereby an LED lamp can be constructed.
(two) LED lighting principle
LEDs are actually part of semiconductor diodes, which enable the conversion of electrical energy into light energy. Light-emitting diodes also have the unidirectional conductivity of ordinary diodes. When a forward voltage is introduced into the light emitting diode, holes injected from the P region to the N region and electrons injected into the P region from the N region are respectively within a few micrometers near the PN junction and the electrons of the N region and the holes of the P region, respectively. After compounding, spontaneous fluorescence will appear. It is particularly noted that the semiconductor materials are different, and the energy states of electrons and holes are quite different. The amount of energy released when electrons and holes recombine exhibit a negative correlation with the wavelength of the emitted light, that is, electrons and air. The less energy released during the recombination, the longer the wavelength of the emitted light; conversely, the more energy is released when the electrons recombine with the holes, the shorter the wavelength of the emitted light.
(3) Characteristics of LED
Compared with ordinary diodes, the characteristics of LEDs are more significant, which are embodied as: low operating current and low operating voltage; relatively long service life; good impact and shock resistance. LEDs exist for the above-mentioned series of features to be used as light sources or signal displays.
(four) classification of LED
LEDs can be divided into various categories based on relevant standards, including ordinary monochromatic light-emitting diodes, high-brightness light-emitting diodes, color-changing light-emitting diodes, ultra-high-brightness light-emitting diodes, voltage-controlled light-emitting diodes, and negative-resistance light-emitting diodes. Among them, ordinary monochromatic light-emitting diodes are most commonly used. The reason is that ordinary monochromatic light-emitting diodes are used as current-controlled semiconductor devices, which have low operating current, low operating voltage, small volume, fast response speed, and relatively uniform and stable illumination. At the same time, the wavelength of the light determines the color of the ordinary monochromatic light-emitting diode, and the wavelength of the light is closely related to the semiconductor material used for manufacturing the light-emitting diode.
Second, LED energy-saving application status
Affected by many advantages of LED, it is widely used in various industries around the world. Up to now, LED has been applied more maturely in many industries in China, and has played a vital positive effect. Take the application of LED in the display and the lamp as an example. The specific performance is as follows:
(1) Application of LED in display
Driven by the rapid development of digital information, the lag of the past display technology has become increasingly prominent. To this end, effective measures need to be taken to gradually increase the innovation and improvement of display technology, that is, by introducing LED into the display industry, the display screen Optimized and upgraded, it has a series of advantages: one is light and thin, portability is enhanced; the other is to increase screen brightness and color expression to make it more uniform; its three-digit power consumption is reduced, luminous efficiency is high, and battery life The ability is significantly improved; the air is environmentally friendly and pollution-free.
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