Now when it comes to LED lamp beads, I believe many people know what they are used for. LED lamp beads, to put it bluntly, are light-emitting diodes made of semiconductor materials to directly convert electrical energy into light energy, and electrical signals into light signals. The most important thing in the use of devices and SMD lamp beads is heat dissipation. According to the lamp beads produced by different manufacturers, the packaging glue used is different. Pay attention to the time and temperature in the early stage of baking, and pay attention to the temperature of the SMD in the later stage, but many people I don't know the principle of LED lamp bead luminescence, let's analyze the principle of LED lamp bead luminescence:

   The principle of led lamp bead light emission: the terminal voltage of the PN junction constitutes a certain potential barrier. When the forward bias voltage is applied, the potential barrier drops, and the majority carriers in the P region and the N region diffuse to each other. Since the electron mobility is higher than the hole migration The rate is much higher, so a large number of electrons will diffuse to the P region, which constitutes the injection of minority carriers into the P region. These electrons recombine with the holes in the valence band, and the energy obtained during the recombination is released in the form of light energy. This is the principle of LED lamp beads.

   When the current acts on the wafer through the wire, the electrons and holes will be pushed into the quantum well, 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 that forms the PN junction. In addition, there are two latest design concepts for LED lamp beads:

  1. Mood lighting: lamps are designed according to the needs of people. Mood lighting is based on human emotions and creates a mood-like lighting environment from the perspective of people. Mood lighting includes four aspects: one is environmental protection and energy saving, the other is health, the third is intelligence, and the fourth is humanization.

  2. Scenario lighting: Lamps are designed based on the needs of the environment. Scenario lighting takes the place as the starting point, and aims to create a beautiful and gorgeous lighting environment to enhance the scene effect and make people feel the atmosphere of the scene.