Electroluminescent lamp
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Solid-state, light-emitting devices. Allows keyboards to be used in low ambient light conditions.

Electroluminence (EL) is the emission of light under electric-field excitation: the conversion of electrical energy into light energy in the form of photons.

In electrical terms, an EL lamp is a light emitting capacitor and is driven from an AC power supply.

Advantages over conventional back-lighting:

* Effective, economical means of back-lighting
* Low power consumption
* Low heat and infra-red emissions
* Flexible
* Uniform light source
* Ultra-thin
* High Life
* Low tooling cost
* Range of colours