3D force sensing enables true edge-to-edge mobile displays

3D force sensing enables true edge-to-edge mobile displays

Technology News |
By Christoph Hammerschmidt

A key aim within mobile handset design is to extend the screen to the very edge of the case, even curving around to the side, to maximize the useable display area. While technologies like flexible OLED displays can support this, it presents challenges for designers who need to incorporate legacy features such as the home button into ever-smaller spaces.

QTC technology from Peratech enables a home button based on force sensing to be fully integrated below the glass screen of the phone, without the need for a bezel of any kind. This enables the implementation of a home button that offers users an important positive force action, but without taking up any of the phone’s displayable area.

Based on patented Quantum Tunnelling Composite (QTC®) technology, force sensors from Peratech bring a new dimension to tactile or force-touch controls by being able to sense force from under 10 grams to over 10 kilograms in a sensor as thin as 50 microns. QTC-based sensors are very robust and resilient, so that changes in resistance due to even the slightest pressure are both predictable and repeatable over millions of cycles. These thin and flexible QTC sensors come in single-point, 3D single-touch, and 3D multi-touch versions and can be used above, below or around rigid or flexible displays, or under metal, plastic, wood, or glass surfaces.


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Capacitive sensing alone is unable to deliver that realistic home button experience and is also prone to false triggering. Combining capacitive and force sensing eliminates false triggering and also supports new design paradigms such as the finger print sensor becoming the power button. QTC technology enables this entirely new approach to handset design, giving the best possible user experience.


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