| 摘要 |
A rotary control for control surface on a processor, like on a large scale audio mixer or other system, includes an illuminated display for angular position, such as lights arranged in an arcuate pattern indicating the value of a parameter by an angular position, on the top of the knob. By placing the display directly on the top of the knob, a crisp illumination is provided allowing an operator to obtain rapid visual feedback concerning the parameters under control. Furthermore, the display allows a variety of display modes, which are suited to the particular parameter under control. The rotary control comprises a stator mounted on the control surface which has a proximal end adjacent to control surface and a distal end. An array of lights is mounted on the distal end of the stator and arranged in an arcuate pattern. A rotor is mounted on the stator, and operable by an operator. The rotor has a shape near the distal end so that the array of lights is visible to the operator. A sensor is coupled with the rotor which senses its relative rotation. Circuitry coupled to the sensor and the array of lights is adapted to connect the sensor and the array of lights to the audio processor so that the audio processor controls illumination of the array of lights in response to the sensor and computer control to indicate a value of a parameter under control by an angular position of illuminated lights in the arcuate pattern.
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