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The emerging LED lighting technology is developing at a high speed. It is characterized by high efficiency, energy saving, environmental protection and long life. It is very popular in the market. New technologies and new solutions in application are also emerging. LED lighting design can combine light source characteristics, such as light source directivity, cold light source and color change, etc., and will definitely become the mainstream of the lighting market. In recent years, with the continuous progress of LED research in material selection, packaging architecture design technology, etc., a new AC light-emitting diode AC drive-free LED technology has emerged at the historic moment. Through a new idea, LED lighting technology has been promoted. Practical.
 
Compared with traditional DCLEDs, AC free-driving LEDs are LED lighting technologies that can be directly plugged into 220V (or 110V) AC without the need for AC / DC conversion. The key technology of AC drive-free LED is the special arrangement and combination technology of LED die during packaging. At the same time, the diode characteristics of LEDPN junction are used as rectification, and multiple die are integrated on a single chip through the semiconductor manufacturing process, that is, high power Grain technology, and adopt a staggered matrix arrangement process to form a bridge circuit, so that AC current can be bidirectionally conducted to achieve light emission. The arrangement of the die is a schematic diagram of the AC-free drive LED die using a staggered matrix arrangement. The actual AC-free drive LED die arrangement photo. The AC-free drive LED die emits light after being connected to the AC, so only two leads are required Introduce the AC source to work with light.
The working principle of AC drive-free LED light source is composed of 5 micro-arms composed of LED micro-crystals in a staggered matrix arrangement process, which is similar to a rectifier bridge. Dies, the positive half of the AC flows along the solid line, the LED dies of the three bridge arms emit light, the negative half of the flow flows along the dotted line, and the LED dies of the three bridge arms emit light, and the LED dies on the four bridge arms take turns Light emitting, the LED die on the opposite bridge arm emit light at the same time, and the LED die on the middle bridge arm are always emitting light due to sharing.
AC free-drive LEDs are small in size and are generally used in small industrial and civil indicator lights. The advantage of high voltage and low current conduction overcomes the problem of relying on the power supply connection caused by high line loss when using DCLEDs; and bidirectional conduction, blue and green Light LED has no electrostatic breakdown ESD problem; the use of microcrystalline technology greatly improves the luminous efficiency; due to the improvement of power factor and low current control, it is a practical new technology for the general lighting industry and LCD backlight panel industry.
At present, AC-free LEDs are continuously updated and improved in terms of luminous brightness, power, etc., but the characteristics of AC-free LEDs, which are simple in application, low cost, and high efficiency, have gradually emerged. The technical certificate of AC free-driving LED is developing rapidly. I believe that in the near future, high-brightness, high-power, low-cost products will be available in large quantities. It will illuminate the world with greener and more environmentally friendly lighting.