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User interface for a controller

  • US 8,813,676 B2
  • Filed: 05/07/2010
  • Issued: 08/26/2014
  • Est. Priority Date: 05/07/2010
  • Status: Active Grant
First Claim
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1. A user interface for a controller, comprising:

  • a panel having multiple indicia representing a user-selectable parameter;

    a knob configured to protrude from the panel and movable about a central axis relative to the multiple indicia; and

    a light projector comprising;

    an illuminating device below the panel;

    a light conduit located along the central axis and optically coupled to the illumination device to carry light from the light source along the central axis;

    a reflector located within the knob and optically coupled to the light conduit to reflect the carried light; and

    a lens located on the knob and optically coupled to the reflector to project the reflected carried light as converging beam of light downwardly onto the panel to form a discrete spot of light on the panel;

    wherein the discrete spot of light is in physical proximity with the multiple indicia such that movement of the knob relative to the multiple indicia causes a corresponding movement of the discrete spot of light, and the spot of light indicates which of the multiple indicia is selected by the knob.

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