Speaking of LED beads believe that many people know what they are used for, LED beads, to put it bluntly, is a light-emitting diode made of semiconductor materials, in order to directly convert electrical energy into light energy, electrical signal into light signal light-emitting devices, SMD lamp beads in the use of the most important is heat dissipation, according to different manufacturers of lamp beads, with different packaging glue, pre-baking to pay attention to the time and temperature, and later to pay attention to SMD temperature, but many people do not know the principle of LED light-emitting beads, the following analysis of the principle of LED light-emitting beads for everyone.
LED lamp beads light principle: PN junction terminal voltage constitutes a certain potential barrier, when the positive bias voltage is added the potential barrier drops, P area and N area of most carriers to each other diffusion, due to electron mobility than hole mobility is much larger, so there will be a large number of electrons to the P area diffusion, constitute the injection of a few carriers in the P area, these electrons and the valence band holes compound, compound the energy obtained in the form of light energy Release out, this is the principle of LED lamp beads light.
When the current acts on this wafer through the wire, electrons and holes will be pushed to the quantum well, in the quantum well electrons and holes compound, and then the energy will be released in the form of photons, which is the principle of LED light-emitting, and the wavelength of light is also the color of light, is determined by the formation of the P-N junction material, in addition to the LED beads currently have two latest design concepts.
1, mood lighting: is to design lamps with human needs. Mood lighting is to human emotion as the starting point, from the human point of view to create a mood-like lighting environment, mood lighting contains four aspects: one is environmental protection and energy saving, two is health, three is intelligent, four is human.
2, situational lighting: is to design lamps and lanterns to the needs of the environment, situational lighting to the place as the starting point, aimed at creating a beautiful, gorgeous light environment, to accentuate the effect of the scene, so that people feel the atmosphere of the scene.
Of course, we should pay attention to the time and temperature, and later to pay attention to the temperature of the patch, which is the principle of LED lamp beads luminous, and the wavelength of light is also the color of light.