Patent ID: 7926964

Claim:
An illuminated dial control comprising: a dial operator rotating about an axis; switch circuitry communicating with the dial operator to produce switched electrical signals with rotation of the dial operator; arcuate internally reflective chambers positioned concentrically about the axis and around the dial operator; light diffusers positioned on front surfaces of the reflective chambers together with the reflective chambers to define sectors of a ring about the axis; light-emitting diodes positioned at a back surface of the reflective chambers and receiving the switched electrical signals to evenly illuminate different sectors of the ring with rotation of the dial operator; and a printed circuit board supporting the light diffusers and light emitting diodes on a first surface surrounding the axis and having a hole allowing an operator shaft to pass through the printed circuit board to communicate with a wiper configured to rotate with the dial operator such that the wiper interengages with a contact set on a second surface of the printed circuit board opposite the first surface forming a portion of the switch circuitry, wherein the contact set includes a set of concentric traces having outermost traces at a first radius and corresponding in angular extent generally to the arcuate extent of the chambers with adjacent ends of the outermost traces being electrically separate on the printed circuit board, and an inner trace positioned continuously within the outermost traces such that the inner trace can be selectively joined to one of the outermost traces by the wiper.