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.
The KoD technology eliminates the need for custom touch sensor patterns, providing designers with the ability to implement a different knob count, shape and position to accommodate a variety of end-user products. The customised configurations are adjustable without changing the embedded firmware of the maXTouch KoD touch controller, leading to a more flexible development cycle.
The maXTouch KoD controller allows designers to keep a rotary encoder input device but combine it with innovative interior design using smart surfaces and multi-touch displays.
An added benefit is that designers can also expect to experience is the ease of building a sealed Human Machine Interface (HMI) module, which is increasingly popular for in-home appliance and industrial applications. Using a knob on a display will also increase safety for the end user, for example, they won’t need to look at the display while driving to adjust their sound or air conditioning.
“Modern user interfaces commonly use multi-touch displays, removing mechanical keys for cutting-edge designs. Yet, functions like temperature or audio volume remain best controlled though a rotary encoder,” said Clayton Pillion, vice president of the Human Machine Interface business unit at Microchip Technology.
“The maXTouch KoD technology offers the benefits of both worlds by providing the support of a capacitive rotary encoder with a turn-key touch controller family and a comprehensive suite of dedicated tools for a fast implementation.”
Microchip is offering two variants. The KD variant enables customers to choose their knob design partner and create their own solution using a reference design jointly developed with BNL Bearings - offering the option to fully customise the design for specific applications.
The MK variant supports the Magic Knob developed by Panasonic Industry. While keeping the flexibility to be mounted on standard touch sensor patterns, the Microchip Panasonic Magic Knob (MPMK) solution provides a high level of customisation for rotation and push haptic feedback, as well as for the top cover material selection.
Microchip is also providing a comprehensive suite of both hardware and software development tools to shorten the development cycle with a capacitive rotary knob.
