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LED is a special diode, when the electric connections will be issued when the light is often used in electronic devices to show whether or not to close or open the circuit of the light, transparent epoxy epoxy LED semiconductor chips out under the enclosed That the two lines or "light" LED shows how to connect to the Canadian circuit, LED wire is negative in two ways:

Is a light bulb from the plane;

The second is the two lines that were short of the line, negative electrode wire should be connected to the negative battery terminal, LED operating voltage relatively low at only about 1-4 V voltage, current draw of approximately 10-40 mA. Luminescence Diode is the most important part of the light bulb in the central semiconductor chip, the chip has two separate interfaces from the region, P region is controlled by the positive charge, and n is a region controlled by the negative charge, to act as the interface of P and the flow of e-n Tailgate, and only when sufficient voltage semiconductor chips, the only open when the current flows and through the electronic interface into the P region.

What makes issued by the LED light and what determines the color of LED

When sufficient voltage across the LED chip to reach the wire, electronic very easy N and P in the region through the separation, P in the region than the positive charge a lot more negative charge in the area of e-n than positive charge , When the voltage and current began to flow in the region of the e-N have enough energy moving through the Department separated into the P region, as a result of a total of Coulomb force between the positive and negative charge each other to attract regional e-P immediately attracted to the positively charged When enough e-P move to the region close to the positive charge, both on the charge of "reintegration"

Every time the electronics and combined with positive charge, the potential for electromagnetic energy can change every time the re-combination of positive and negative charge, the quantum of electromagnetic energy to the frequency of semiconductor material characteristics optoelectronic issued in the form of (usually gallium, arsenic and phosphorus Combination of chemical elements) only if the photons in a very narrow frequency range can launch a different light so that the light-emitting diodes semiconductor materials of different colors and different needs of energy to enable them to become bright.

LED issued by the energy of the number of
The voltage required to cause the electronic flow through Pn Department and the separation of power is constant with the different colors of light-emitting diode issued by the monochrome obvious perspective, LED light to issue energy (E) is the electronic charge (q) and the relevant The required voltage (V) so that the light-emitting diode light-emitting J E = qV, this simple formula illustrates the voltage and power with the constant. Q constant is the charge of a single electron Coulomb -1.6 x 10-19 (power units)

To find out from the voltage of energy
If the flow measurement of light-emitting diode voltage wire, so you want to find out LED light to issue the necessary energy accordingly. For example, red light-emitting diodes and the measured voltage of 1.7 volts and is the lead, then make the necessary light-emitting diode Energy is E = qV or E = -1.6 x 10-19 (1.71) J

To find out from the wavelength of the frequency
Optical frequency and wavelength of light associated spectrometer can be used to check issued by the LED light and issued estimate by the LED light of the peak value. But we prefer to detection by the LED light intensity

,.C is representative of the speed of light (3 x 108 meters per second) and
On behalf of the spectrometer is read by the optical wavelength (or 10-9 to nano-meters). If you are from the observation made by instruments in the red light emitting diode, LED, you will find the strength to issue the maximum and scope of the color from the spectrometer Read the wavelength is consistent with the

= 660 nm or 660 x 10-9 m.