Introduction: Wanjia Lights is the best adjective we describe in urban landscapes. When night falls, our life is like a day, and the bulb that makes a great contribution to this comfortable life. The theme we want to talk about is the classification of LED bulbs. Since the invention of electric lights by Edison in the United States in the last century, the types of electric lights have also come out with many types due to the advancement of technology and people's actual needs. So what are the classifications of LED bulbs, and what is the principle of LED bulbs? Let's learn together!
LED bulb
What are the classifications of LED bulbs?
What are the classifications of LED bulbs, divided into three categories, spherical and pointed, lamp cup type
What are the classifications of LED bulbs? Spherical:
1. Single-sided illumination, the lower part is a plastic case or an aluminum case (some spherical surfaces have a small curvature and look like an inverted trapezoid);
2, ring + top light, commonly known as corn foam, because the shape of the small yellow dot structure is very much like corn and named;
3, three-fork shape, can also be regarded as the way of corn bubble lighting, but more scientific structure than corn bubble, so it is more popular at present;
What are the classifications of LED bulbs?
Basically, they are old-fashioned products, just like the spotlight cups, they have a lot of limitations, so they are close to being eliminated;
What are the classifications of LED bulbs?
1, single-sided illumination (similar to the spherical shape, is the sharp + lens only);
2, three-fork shape (same as above);
3, chrome three-sided light, this is very high-grade, the light is also good, but there is no light point at the top;
4, the candle type, is the tip bubble plus a tail, basically the same as the tip bubble.
LED light bulb principle
LED bulb
LED (Light Emitting Diode), a solid-state semiconductor device that converts electrical energy into visible light, can directly convert electricity into light. The heart of the LED is a semiconductor wafer. One end of the wafer is attached to a holder, one end is the negative pole, and the other end is connected to the positive pole of the power supply, so that the entire wafer is encapsulated by epoxy resin. The semiconductor wafer consists of two parts, one part is a P-type semiconductor, in which the hole dominates, and the other end is an N-type semiconductor, which is mainly electrons here. But when the two semiconductors are connected, they form a PN junction. When a current is applied to the wafer through the wire, the electrons are pushed toward the P region. In the P region, electrons recombine with the holes, and then the energy is emitted in the form of photons. This is the principle of illumination of the LED bulb. The wavelength of light, which is the color of light, is determined by the material that forms the PN junction.
Why does the light bulb shine?
The main device that can illuminate in a light bulb is a filament that is wound with a fine tungsten wire. In a light bulb made of glass, the air is pumped away, and a non-combustible gas such as nitrogen or nitrogen is charged, and then sealed. When the current is transmitted from the wire to the filament, because the resistance of the filament is very large, high heat is generated, and the heat is initiated to a certain extent.
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