Unambiguous capacitance sensing using shared inputs

Details Unambiguous capacitance sensing using shared inputs Unambiguous capacitance sensing using shared inputs

2011-06-21

2011-06-21

Liang, Regina (Department: 2629)

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

C178S018060

Reexamination Certificate

active

07965281

ABSTRACT:
Capacitance sensing apparatuses are described. The apparatus includes capacitance sensor elements that traverse a sensing region. The apparatus also includes sensor circuitry that has multiple inputs. More than one of the capacitance sensor elements are electrically coupled to the same input. A position of an object along an axis of the sensing region is unambiguously identified according to which subset of the inputs senses a change in capacitance that is induced when the object is proximate to the sensing region.

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ISA/US, International Search Report and Written Opinion for International Application No. PCT/US2007/079594, 8 pages, Feb. 12, 2008.

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