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Control knob with multi-color indicator

  • US 20050236263A1
  • Filed: 06/29/2005
  • Published: 10/27/2005
  • Est. Priority Date: 01/12/2004
  • Status: Active Grant
First Claim
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1. A control knob, including:

  • a control device for controlling a level of a signal in response to a position of said knob;

    a light emitting device which emits light of a color chosen from at least two colors dependent upon said level of said signal; and

    a portion of said knob receiving and passing said emitted light for viewing by a user.

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