Abstract
A light-emitting diode (LED) display manifests itself as a flat panel
display that uses LEDs to display video. An LED is a particular solid-state
p-n junction diode that gives out light upon the
application of a bias voltage. The luminescence process in this case is
electroluminescence, which is associated with emission wavelengths in the
visible and infrared regions of the spectrum. When a forward bias is applied
to the p-n junction diode, carriers are injected into the
depletion region in large numbers. Because of their physical proximity, the
electron-hole pairs undergo a recombination that is associated with the
emission of energy. Depending on the semiconductor band-gap characteristics,
this emitted energy can be in the form of heat (as phonons) or light (as
photons).