IR EMITTER

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IR EMITTER

• Generates infrared (IR) light beams in specific
  patterns in order to transmit information and
  commands from one device to another.

• Are solid-state gallium arsenide devices that
  emits a beam of radiant flux when forward-biased.

• When the junction is forward-biased, electrons
  from the n-region will recombine with excess
  holes of the p-material in a specially designed
  recombination region sandwiched between the p-
  and n- type materials.

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IR EMITTER

• During this recombination process, energy is
  radiated away from the device in the form of
  photons.The generated photons will either be
  reabsorbed in the structure or leave the surface
  of the device as radiant energy.

• Photons
• A quantum of electromagnetic radiation.
• An elementary particle that is its own
  antiparticle

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IR EMITTER

• The most common use of an IR emitter is in a
  remote control. The clear plastic window at the
  front of most remote controls contains the IR
  emitter. This device sends out or emits the light
  beams (which are invisible to the human eye), and
  they are picked up and read by the IR receivers
  in the devices the remotes control.

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• There are also IR emitters that attach to the
  glass or plastic windows on audio/video
  components and connect to a central control
  center allowing one remote control (usually a
  radio frequency remote) to control many IR
  devices. In such a situation, the remote control
  sends a radio frequency signal to the central
  control box, which translates the signals into IR
  signals and sends them to the components using
  the IR emitters attached to the components.