The secret of light-emitting diodes (leds) have to say!
a jumped out of light-emitting diodes (leds) are always a lot of topics, such as light-emitting diodes (leds) what are the basic characteristics of, what is the volt-ampere characteristics of light emitting diode, light emitting diode of the electric power is how to calculate and so on. Small make up today under the combined share light-emitting diodes (leds) what are the unique performance.
first from its role, its role is mainly used for rectification, rectification, voltage regulator, clamping clipped, transfiguration, etc. , how it glowing? When on the leds p-n junction and the forward voltage, p-n junction barrier is reduced, carrier is greater than the drift motion of the spread of the games, lead to the hole injection of P area to N, N the electronic injection to P, such mutual injection hole after an encounter with the electronic produce compound, compound produced when much of the energy in the form of light, thus formed the glow.
the commonly used there are four leds its application circuit, dc drive circuit, ac drive circuit, pulse driving circuit and color changing light driver circuit. We are using the LED indication circuit, should be concatenated current-limiting resistor, and the resistance value should be used according to different voltage and LED the work current to select.
the last is the lights, the light efficiency light-emitting diodes (leds), as a general rule, be 50 lm/W, and there are certain gaps when compared with the efficiency of the fluorescent lamp, but white LED light-emitting diodes (leds) used for local lighting, energy-saving effect is limited.
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