SINGLE OR MULTITOUCH-CAPABLE TOUCHSCREENS OR TOUCHPADS COMPRISING AN ARRAY OF PRESSURE SENSORS AND THE PRODUCTION OF SUCH SENSORS
First Claim
1. Touchscreen with a display, wherein the position of the contact of a finger or other object on a flexible surface is determined by an array of pressure sensors that are located not only on the edge of the surface but that being distributed over the entire surface measure the pressure acting on the relevant point, wherein the deformation sensors are attached directly to the rear or are printed to the rear of the flexible display.
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Accused Products
Abstract
A multitouch-capable touchscreen is realized in that a large number of pressure sensors are attached under a flexible surface and thus both the pressure distribution and also the deformation of the surface is measured. Local pressure maxima occur due to the flexibility of the surface material with associated deformation on contact. As several local pressure maxima can exist, it is thus also possible to identify a plurality of contacts simultaneously. It is possible from the strength of pressure and pressure distribution to determine the force that is used for pressing such that this information can also be used in the user interface. Such sensors can be produced very efficiently and inexpensively by printing an ink that changes its resistance under pressure onto PCB tracks designed as sensor surfaces. The PCB tracks and the sensor surfaces can also be printed out using an ink with as low a resistance as possible.
181 Citations
23 Claims
- 1. Touchscreen with a display, wherein the position of the contact of a finger or other object on a flexible surface is determined by an array of pressure sensors that are located not only on the edge of the surface but that being distributed over the entire surface measure the pressure acting on the relevant point, wherein the deformation sensors are attached directly to the rear or are printed to the rear of the flexible display.
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15. (canceled)
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19. (canceled)
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23. (canceled)
Specification