A led full-color led display business analytic principle - related
Full color LED screen - knowledge
Full color led display production businesses tell everyone what led to the?
According to urinate, LED is a semiconductor diode, can convert electrical energy to light energy.
Light-emitting diodes (leds) as the development of the common diode LED chip tube is composed of a p-n junction, also has unidirectional conductivity.
When adding forward voltage to light emitting diode, from P area into N the holes and by N area into P area electronic, near the p-n junction several micrometers respectively with the hole recombination of electrons and P N area area, produce the spontaneous emission fluorescence.
Different of electrons and holes in semiconductor materials of different energy states.
When the electrons and holes of composite release how much energy is different, the more energy release, the shorter the wavelength of light.
Commonly used are red, green or yellow light diode.
Light emitting diode reverse breakdown voltage is greater than 5 v.
Positive volt-ampere characteristic curve is very steep, it must be series current limiting resistor to control through the diode current.
Current limiting resistor R type under the available computing: R = (
/ IF the type of E for the power supply voltage, UF positive pressure drop for the LED, IF for the normal work of the LED current.
Light-emitting diodes (leds) core part is composed of p-type and n-type semiconductor semiconductor chips, between the p-type and n-type semiconductor semiconductor has a transition layer, called the PN junction.
In some of the semiconductor PN junction, the minority carrier injection with majority carrier compound will release excess energy in the form of light, so as to directly convert the electric energy to light energy.
PN junction to add reverse voltage, minority carrier injection, so the light.
Principle of the use of injection electroluminescent diode called light-emitting diodes (leds), known as the LED.
When it is in a state of positive work (
The combined with forward voltage on both ends)
, when the current is flowing from the LED anode to cathode, semiconductor crystal gives different colors of light from ultraviolet to infrared, the strength of the light associated with current.
We now have no more thoroughly and understanding of LED?
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