"What is a light emitting diode" is a question that may occur to you as you go electronics shopping.
Nearly every electronic device these days features a light emitting diode, something that you probably know better as an LED. While you know that the LED display panels and LED televisions are nice and that if given a choice you always want LED, you probably don’t know what LED really means.
A light emitting diode or LED is simply a semiconductor light source. When power is introduced to the diode, electrons fill holes in the device to releases photon energy. LED’s are generally less than 1 mm in size and are arranged in patterns and masses to created lighted displays such as those you see on cell phones, digital clocks and even microwave displays.