Wednesday, August 27, 2008

Wacom announces new capacitive touch sensing technology

Wacom announced that the compnay has new touch sensing technology called Reversing Ramped Field Capacitive (RRFC) touch. From the technical description, it looks like a variation of surface capacitive touch technology


RRFC touch starts by generating an AC voltage which is applied to two adjacent corners and a DC voltage which is applied to the opposite two corners forming a voltage ramp across the sensor and a corresponding ramped electro-static field. The controller repeats this for all four possible corner combinations.. The measurement of the energy in the fields happens at each corner in a way that efficiently removes all capacitance effects except those that are related to a finger touch. In its simplest form, the actual touch point on the X or Y axis is a ratio of the measured results from the two ramped fields that were generated on that axis.

Not so surprisngly, they seems to plan to be a solution provider of dual-mode pen and touch technolgoy. At this time, N-trig and InPlay technologies are major providers of dual-mode pen and touch technolcoy.

For Tablet PC OEMs designing dual-input applications, Wacom RRFC touch technology can be easily integrated with Wacom's market-leading EMR pen-input technology.

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