A light source created by a light emitting diode (LED). For decades, LEDs have been used as indicator lights on myriad products; however, starting in the 2000s, they began to replace incandescent, ...

DEFINITION: A semi-conductor device that emits light energy when an electrical current is passed through it. LED lights are an environmentally-friendly alternative to traditionally incandescent ...

An electrophotographic printer that uses a matrix of LEDs as its light source. The LED mechanism is much simpler than its laser printer counterpart. A stationary array of LEDs is used instead of ...