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. Two particular LED designs are popular: surface emitters and edge emitters. In the former, the direction of major emission is normal to the plane of the active region, whereas in the latter the direction of major emission is in the plane of the active region. The emission pattern of the surface emitters is very much isotropic, whereas that of the edge emitters is highly directional.
