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LED headlight cold knowledge

Views:8     Author:Author:Shuomeixing editor     Publish Time: 2021-08-14      Origin:Site

LED headlight cold knowledge

  Compared with traditional car halogen bulbs, LED car lights consume only 1/10 of the power, which can better save energy and protect the car's circuit from being burned by the excessive load current.

   Advantage:

  ·High brightness, low energy consumption, long life, small size

  ·Lighting without delay

  ·Simple structure, good stability, and shock resistance

  ·High light quality, it is basically a non-radiative "green" light source.

  The light-emitting diode is a solid-state semiconductor device that can directly convert electricity into light. The heart of the LED is a semiconductor chip, one end of the chip is attached to a support, one end is the negative pole, and the other end is connected to the positive pole of the power supply so that the entire chip is encapsulated by epoxy resin. The semiconductor wafer is composed of two parts, one part is a P-type semiconductor, in which holes dominate, and the other end is an N-type semiconductor, which is mainly electrons.

  But when these two semiconductors are connected, a "junction" is formed between them. When the current acts on the chip through the wire, the electrons will be pushed to the P area, where the electrons and holes recombine and then emit energy in the form of photons. This is the principle of LED light emission. The wavelength of light is also the color of light, which is determined by the material forming the P-N junction.

  Matrix LED is to arrange and control the LED light source in a matrix manner.

  In each matrix LED headlight of the new Audi A8 family, 5 reflecting units are arranged into a high beam lighting assembly.

  On top of each reflecting unit, there are 5 small LED light sources, and each small LED light source can point independently On, off, or dimming, 5 groups of 25 small LED light sources can be combined together to achieve variable and precise illumination of .

  In theory, a pair of matrix LED high beams can achieve more than 960 million combinations of lighting forms.


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