LEDs are available in a
wide range of shapes, colours and various sizes with different light output
intensities available, with the most common (and cheapest to produce) being the
standard 5mm Red Gallium Arsenide Phosphide (GaAsP) LED.
LED’s are also available
in various “packages” arranged to produce both letters and numbers with the
most common being that of the “seven segment display” arrangement.
Nowadays, full colour
flat screen LED displays, hand held devices and TV’s are available which use a
vast number of multicoloured LED’s all been driven directly by their own
dedicated IC.
Most light emitting
diodes produce just a single output of coloured light however, multi-coloured
LEDs are now available that can produce a range of different colours from within
a single device. Most of these are actually two or three LEDs fabricated within
a single package.
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