Capacitive position sensor

Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters

Reexamination Certificate

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C324S658000

Reexamination Certificate

active

07821274

ABSTRACT:
A sensor includes a substrate with a sensitive area defined by a pattern of electrodes. The pattern of electrodes includes a first group of drive elements interconnected to form a plurality of row electrodes extending along a first direction, a second group of drive elements interconnected to form a plurality of column electrodes extending along a second direction, and a group of sense elements interconnected to form a sense electrode extending along both the first and second directions. The sensor may be coupled to a controller that includes a drive unit for applying drive signals to the row and column electrodes, and a sense unit for measuring sense signals representing a degree of coupling of the drive signals applied to the row and column electrodes to the sense electrode.

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International Search Report (ISR) and Written Opinion of International Searching Authority in corresponding application PCT/GB2008/001425.

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