Rotary Actuator Assembly

A rotary actuator assembly comprising:

• a touch panel having a capacitively-sensing detection surface;
• a rotary actuator including a stator, a rotary body, a sensor ring, and a sliding contact, the stator being situated on the detection surface of the touch panel, the rotary body being rotatably mounted on the stator, the sensor ring being coupled to the rotary body to be rotatable with the rotary body relative to the stator, the sensor ring including a first ring surface and a second ring surface, the first ring surface having contact surfaces and insulating surfaces alternately arranged over the circumference thereof and the second ring surface having a circumferential metal surface that is electrically connected to the contact surfaces of the first ring surface, the sliding contact being connected to the stator and having a contact pad and a contact spring connected together, the contact pad resting against a position of the detection surface of the touch panel and forming an electrical contact point fixed at the position, and the contact spring resting against the first ring surface of the sensor ring and contacting the contact surfaces and the insulating surfaces of the first ring surface in alternation as the sensor ring rotates relative to the stator with rotation of the rotary body whereby a variable electrical signal is generated at the electrical contact point;
• and
• wherein the variable electrical signal is detectable by the touch panel and the touch panel includes a mutual capacitance touch sensor assembly.