Title:
TOUCH SENSOR WITH IMPROVED ELECTRODE PATTERN
Document Type and Number:
WIPO Patent Application WO2003090156
Kind Code:
A9
Abstract:
A touch sensor includes a substrate with a touch region, and a series resistor chain for creating electrical fields across the touch region. The resistor chain comprises a plurality of conductive electrodes that to form overlap resistors there between. The electrodes have inner portions that are separated by junctions. The touch sensor also includes insulating regions between the touch region and the resistor chain. The insulating regions are separated by gaps to provide a plurality of conductive pathways to the touch region, thereby minimizing non-linear ripple along the sourcing sides of the substrate. Some of the gaps are junction gaps that are formed between the touch region and junctions. Electrically conductive islands are placed within the junction gaps to provide an electrical node within each junction gap, thereby preventing bunching of equipotential lines within the junction, and minimizing non-linear ripple along the non-sourcing sides of the substrate.
Inventors:
AROYAN JAMES L
SCHARFF DANIEL H
SCHARFF DANIEL H
Application Number:
PCT/US2003/011543
Publication Date:
March 25, 2004
Filing Date:
April 15, 2003
Export Citation:
Assignee:
ELO TOUCHSYSTEMS INC (US)
International Classes:
G06F3/045; G06F3/041; (IPC1-7): G06K11/12; G06F3/033
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