What are the characteristics of led lamp beads?
l LED lamp beads introduction
LED is called light emitting diode. The terminal voltage of the PN junction constitutes a certain barrier. When the forward bias voltage is applied, the barrier decreases, and the majority carriers in the P and N regions diffuse toward each other. Since the electron mobility is much larger than the hole mobility, a large amount of electrons diffuse into the P region, which constitutes injection of minority carriers in 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 PN junction illumination.
l LED lamp bead characteristics
1. Voltage: LED lamp bead uses low voltage power supply, the supply voltage is between 2-4V, depending on the product, so it is driven by a higher voltage than the high voltage power supply; it is especially suitable for public places;
2. Current: The working current is between 0 and 15 mA, and the brightness becomes brighter as the current increases.
3. Performance: Energy consumption is reduced by 80% compared to incandescent lamps with the same efficacy.
4. Applicability: Very small, each unit LED small piece is 3-5mm square, so it can be made into various shapes and suitable for variable environment.
6. Response time: The response time of the incandescent lamp is millisecond, and the response time of the LED is nanosecond.
7. Environmental pollution: no harmful metal mercury.
8. Color: Change the current to change color. The LED can easily adjust the energy band structure and band gap of the material by chemical modification method to realize multi-color luminescence of red, yellow, green and blue. For example, a red LED with a small current can turn orange, yellow, and finally green as the current increases.
l LED lamp bead application range
LED lamp beads are widely used in lighting production, LED large screen display, traffic lights, decoration, computers, electronic toy gifts, switches, telephones, advertising, urban glory engineering and many other production areas.
If you want to know more, our website has product specifications for LED, you can go to ALLICDATA ELECTRONICS LIMITED to get more information