electroluminescent lamp
Quick Summary
An electroluminescent lamp is a type of lamp that produces light through electroluminescence, which is the emission of light from a material when an electric current flows through it. This process is a direct conversion of electrical energy into visible light without generating heat, unlike incandescent lamps.1
There are two main ways electroluminescence occurs:
* Intrinsic electroluminescence: Electrons are freed by an electric field and collide with luminescent centers, causing light emission as electrons recombine with ionized atoms. This often requires an alternating voltage for sustained light.1
* Charge injection: This happens when an electrode contacts a crystal to allow electron flow, or when a voltage across a p-n junction causes current. Light is emitted as electrons lose energy by recombining with centers or holes.1
Electroluminescent panels are used for signal indicators and display devices rather than general lighting. They are a type of semiconductor lamp, often used for night-lights and instrument panels.23
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