Manufacturing principle of led lamp

LED is a solid state semiconductor device that can convert electric energy into visible light, namely, light emitting diode, which can directly convert electricity into light. The heart of LED is a semiconductor chip. One end of the chip is attached to a bracket, one end is a 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 chip is composed of two parts. One part is a P-type semiconductor, in which holes are dominant, and the other end is an N-type semiconductor, in which electrons are dominant. When the two semiconductors are connected, a P-N 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 will recombine with holes, and then emit energy in the form of photons. This is the principle of LED light emission. The wavelength of light, that is, the color of light, is determined by the material that forms the P-N junction.

A single LED lamp bead can only work under low voltage (about 3V) and low current (about a few mA), and the light emitted is very weak. Many LED lamp beads need to be connected in series or parallel; At the same time, a single LED lamp bead is unidirectional conductive. In order to make full use of the positive and negative half cycle currents of AC, an integrated circuit chip is required to convert the AC 220V power supply into DC power with voltage and current matching the LED assembly, so as to meet the requirements of the LED lamp bead assembly and enable it to light normally.

The LED lamp breaks through the design concept of traditional lamps, aiming to create a gorgeous and colorful lighting environment to set off the living environment and achieve the desired style and scene atmosphere. Another LED lighting design scheme is more humanized. In the design, the product is designed according to the needs of people. The lighting design scheme is mostly based on personal preferences. The latest design concepts of the above two LED lamps fully demonstrate the contemporary design concepts of energy conservation, environmental protection, safety and health, scientific intelligence, and humanization.