What Is The Working Principle Of In-depth Analysis Of LED Light Bar?
What is the working principle of led light bar? From the light emitting level of the LED light bar, the LED light is made by packaging GaN chips and yttrium aluminum garnet (YAG). The GaN chip emits blue light (λp=465nm, Wd=30nm), and the YAG phosphor powder containing Ce3+ produced by high-temperature sintering is excited by the blue light and emits yellow light with a peak value of 550nm. The blue LED lamp substrate is installed in a bowl-shaped reflective cavity, covered with a thin layer of resin mixed with YAG, about 200-500nm. Part of the blue light emitted by the LED lamp substrate is absorbed by the phosphor, and the other part of the blue light is mixed with the yellow light emitted by the phosphor to obtain white light. Now, for InGaN/YAG white LED lamps, by changing the chemical composition of the YAG phosphor and adjusting the thickness of the phosphor layer, white light of various colors with a color temperature of 3500-10000K can be obtained. This method of obtaining white light through blue LED lamps has a simple structure, low cost, and high technical maturity, so it is most widely used. This is one of the principles of LED light strips.
What is the working principle of LED light bar_Electronic physics level
What is the working principle of led light bar? From a physical point of view, electrons in an atom have many energy levels. When an electron jumps from a high energy level to a low energy level, the energy of the electron decreases, and the reduced energy is converted into photons and emitted. A large number of these photons is the laser. But the difference is that the LED does not emit light through the electronic transition inside the atom, but by applying a voltage across the PN junction of the LED, so that the PN junction itself forms an energy level (in fact, a series of energy levels) level), and then electrons jump at this energy level and produce photons to emit light. When electric current acts on this chip by wire time, electron will be pushed to P district, and in P district, electron is recombined with hole, then will send energy with the form of photon, the principle of LED light that Here it is. And the wavelength of light i.e. the color of light, be determined by the material forming P-N junction. This is also one of the principles of LED light strips.
