Light Emitting Diode - acronym LED
A Light Emitting Diode is a semiconductor emitting visible light when a electric current is passed through it. The colour spectrum emitted is dependent on the material used. Typically colours produced are RED, Green, Blue (3 primary colours used in LED screen production), Amber/Yellow, Warm & Cool White.
White light contains all colors and cannot be directly created by a single LED. The most common form of "white" LED really isn't white. Its a Gallium Nitride blue LED coated with a phosphor that, when excited by the blue LED light, emits a broad range spectrum that in addition to the blue emission, makes a white light.

Technical
A Light Emitting Diode (LED) is a p-n junction diode that is capable of emitting light. An LED operates just like a regular p-n junction diode. Diodes must be forward biased for current conduction.

The difference between a LED and a regular diode is the semiconductor material used to form the p-n junction - regular diodes are made of semiconductor materials like Silicon or Germanium; whereas LEDs are made of materials like GaAs compounds and InP compounds.

In a regular diode, when current flows, energy is thrown off in the form of heat. In a light emitting diode, an electric current passing through the diode causes light in the visible portion of the electromagnetic spectrum to be emitted. This phenomenon is called electroluminescence and is responsible for the emission of incoherent light from the semiconductor material.

LEDs can emit light of different colors. In fact, the radiation emitted may not be in the visible region at all. LEDs can emit light in the Infrared and Ultraviolet region too. The color of the light emitted depends on the semiconductor used to fabricate the p-n junction in the diode. For example, GaAsP is used to make LEDs that emit red light and InGaN for blue LEDs.

Using LEDs for providing visual indication in displays is very common, typically used for power 'on' indicators as in a single red LED,  packaged together to form numeric displays. Such displays are called seven segment displays. You may have seen these displays on your microwave or similar appliance.

LEDs emit a narrow beam of light and require additional focusing optical devices to generate a desired radiation pattern. As LEDs of higher power are developed and optics for LEDs evolves, LEDs are being used increasingly to replace incandescent lamps and area lighting.




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Projects - "The Mean Fiddler Story"

LEDAVISION ROTA360
ROTA360 LED Screen.  Indoor and Outdoor version.
Full details Click Here
Download the full A3 PDF brochure  Click here

LEDAVISION Net Effect
(LEDACURTIAN)
Outdoor/Indoor Touring IP65
P18.75 (18.75mm Dot Pitch)
Lightweightt 4.5kgs per panel
h.600 x w.600 x d.85mm
RGB SMD LED
Pixel matrix 32 x 32
Options;
ID P37.5    h.600 x w.1200mm
ID P37.5    h.600  x  w.600mm
OD P37.5  h.600 x w.600m


     LEDAVISION FPS
Permanent/temporary installs
Indoor, Semi-Outdoor
Modular panels
Media Server, PC, Scaler
Options;
ID P6, P7.62
(SMD 3in1, 3x3)




     LEDAVISION FPS
Permanent/temporary installs
Outdoor
Modular panels
Media Server, PC, Scaler
Options;
OD P10, P12, P16, P20....







   LEDAVISION FPS
The Mean Fiddler Hotel
Rouse Hill, Sydney
Comissioned July 2008
Outdoor P10 1R,1G,1B

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The Mean Fiddler Hotel
Screen commissioned on deadline for the
2008 Beijing Olympic Games Aug 8-24

www.meanfiddler.com.au