The so-called led lamp beads are one of the important components of led lamps. According to the different luminous colors, the materials are different, and the product styles, quality or specifications that consumers can choose for reference are also diverse. And if you want to ensure that led light beads can play their role to the greatest extent, Bian Xiao suggested that in addition to the word-of-mouth evaluation of the product itself, you should also learn the classification, principle and replacement method of LED light beads introduced below, or you can learn selectively.

First, how to change the led lamp beads?

1, remove the screen and backlight assembly. 2. Heat the back of the light bar until the tin is open, and take out the lamp beads with tweezers.

3. Clean the solder joint with flux, put the removed lamp bead back to its original position and continue heating until the lamp bead and the solder joint fuse, and then stop heating to clean the solder joint.

4. As long as the power is on, the test light bar works normally.

Secondly, there are three types of LED bulbs:

1. Direct-inserted low-power specifications include: straw hat/helmet, round head, concave, oval, square (2*3*4) bullet, flat head, (3/5/ flat head/bread type) piranha, etc.

2. Patches are generally divided into (3020/3528/5050)/1016/1024, etc. These are side lights.

3. High-power LED cannot be classified as SMD series. Their power and current usage are different, and their photoelectric parameters are also very different. If a single high-power LED light source is not equipped with a heat dissipation base (generally hexagonal aluminum base), its appearance is not much different from that of ordinary patches. The high-power LED light source is round, and the packaging method is basically the same as that of patch-to-patch, but it is essentially different from patch-to-patch in terms of use conditions/environment/effect.

Three. The luminous principle of LED lamp beads;

LED English is (light? Distribute Diode)? LED lamp bead is the abbreviation of light emitting diode, which is a popular name.

The terminal voltage of PN junction constitutes a certain barrier. When forward bias is applied, the barrier drops and most carriers in the P and N regions diffuse with each other. Because the electron mobility is much greater than the hole mobility, a large number of electrons will diffuse to the P region, forming a minority carrier injection P region. These electrons recombine with holes in the valence band, and the energy obtained in the recombination process is released in the form of light energy. This is the principle of PN junction luminescence.

The replacement method of led lamp beads is not very complicated. Even friends who have no professional knowledge in this field can generally achieve satisfactory results as long as they refer to the steps described above and follow the corresponding methods and precautions. Of course, before the replacement operation, it is necessary to know other aspects of led light beads, such as classification, lighting principle, etc., which can describe a more comprehensive image of led light beads for us and let us better understand the product.