Unlike traditional mechanical rotary encoders, this technology enables the mounting of the knob directly onto the display without an opening in the panel or any customisation of the touch pattern, increasing both design flexibility and system cost savings. Why capacitive knob? Until now, the mainstream of devices integrated for vehicle air conditioning and volume controls are mechanical switches and rotary knobs that provide mechanical feel in order to provide the certainty of operation. In recent years, differentiation by interior design is becoming more popular, and an increasing number of vehicles are adopting flat capacitive touch switches for their interiors for seamless and high design. As various operation devices are being studied to achieve both “reliable operability” and “high design“, the need to combine an electrostatic touch switch and a rotary knob has emerged. Furthermore, in automotive displays such as car navigation systems, there are need to place mechanical knobs directly on the display for space restrictions due to the increase in screen / display sizes. Expecting adoption of a capacitive knob that can operate on a capacitive touch display will provide both operability and design.