Touch sensing device

Details Touch sensing device Touch sensing device

G - Physics

08

B

340/124

G08B 1/08 (2006.01) H03K 17/96 (2006.01)

Patent

CA 1202397

ASTRACT OF THE DISCLOSURE A see-through type finger touch sensing device provides a resonator and an oscillator which supplies an AC signal to the resonator as the sensing circuit. Moreover, a buffer circuit is provided which isolates an output of the oscillator from the selected touch electrodes and supplies it to all remaining non-selected touch electrodes when such sensing circuits are sequ- entially connected to the plurality of touch sensing electrodes. Thereby, the selected touch electrodes and non-selected touch electrodes are maintained at voltages in the same phase and the same level and inter-electrode impedance is substantially negligible.

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