Force sensitive sensor adds functionality to mobile devices
Peratech’s proprietary quantum tunnelling composite (QTC) technology is used in the distributed force array (DFA) sensor. The force touch sensor is designed for use with mobile devices.
The DFA sensor uses QTC technology to provide an array of single point sensors that can be used in conjunction with a position sensor (such as capacitive) to measure force and correlate it with position.
The sensor’s variable input force allows for additional, or new, functionality, such as the ability to navigate device menus and perform other operations via single-finger touch. The DFA sensor also allows for correct haptic feedback when the force reaches a pre-selected activation point, a feature that obviates false touch situations.
In multi-touch applications, the DFA’s proportional force sensing feature can determine the ratio of forces between presses (i.e. harder press to left or right), which can have benefits in improved control, especially in gaming applications.
The DFA sensors are customisable, cost-effective, low power in operation for human machine interfacing (HMI).
The patented QTC technology enables Peratech’s force sensors bring a new dimension to tactile, or force-touch controls. QTC materials change from being an almost perfect insulator to becoming increasingly conductive in proportion to the amount of force applied to them. The materials are robust and resilient, so that changes in resistance due to even the slightest pressure are both predictable and repeatable over more than a million cycles.
Peratech’s thin and flexible QTC sensors come in single-point, 3D single-touch, and 3D multi-touch versions. They can be used above, below or around rigid or flexible displays, or under metal, plastic, wood, or glass surfaces. The QTC touch experience is intuitive, consistent, precise, durable and reliable, whatever the environment, even when using gloved fingers or in the presence of moisture.
Applications for QTC force sensors include consumer and automotive electronics, smart home systems and appliances, and industrial controls.
Peratech’s custom design and integration service minimises both cost and time-to-market, says the company.