TOUCH SCREEN ELEMENT
First Claim
1. A device comprising:
- a plurality of first electrodes, each extending in a first direction;
a resistive voltage divider coupled to each of the plurality of electrodes to provide a stepwise progression in voltage reduction between a first one of the first electrodes and each succeeding electrode along a second direction to provide second direction touch position information;
a plurality of co-extending pairs of second and third electrodes having complimentary varying area over their distance of co-extension, each pair disposed between adjacent first electrodes, and each of the second and third electrodes respectively electrically coupled to each other to provide first direction touch position information.
18 Assignments
0 Petitions
Accused Products
Abstract
A capacitive two-dimensional (2D) touch panel has three sets of interleaved electrodes. A first set of electrodes is spaced apart along the y-direction and these are galvanically connected to each other by a resistive strip connected at either end to a connection line. A second set of electrodes is also arrayed along the y-direction and these are galvanically connected to each other via a notionally non-resistive first connection. A third set of electrodes is also arrayed along the y-direction and these are galvanically connected to each other via a notionally non-resistive second connection. The second and third sets of electrodes are interleaved without galvanic cross-conduction to provide a gradient along the x-direction to resolve touch position in the x-direction. The first set of electrodes resolves touch position along the y-direction. Passive or active capacitive sensing techniques may be used to acquire the position information from the 2D touch panel.
197 Citations
20 Claims
-
1. A device comprising:
-
a plurality of first electrodes, each extending in a first direction; a resistive voltage divider coupled to each of the plurality of electrodes to provide a stepwise progression in voltage reduction between a first one of the first electrodes and each succeeding electrode along a second direction to provide second direction touch position information; a plurality of co-extending pairs of second and third electrodes having complimentary varying area over their distance of co-extension, each pair disposed between adjacent first electrodes, and each of the second and third electrodes respectively electrically coupled to each other to provide first direction touch position information. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A device comprising:
-
a plurality of first substantially parallel electrodes, each extending along a first axis; a resistive voltage divider coupled to each of the plurality of electrodes to provide a reduction in accumulated charge between a first one of the first electrodes and each succeeding electrode along a second axis substantially perpendicular to the first axis to provide second axis position information as a function of touch position along the second axis; a plurality of second electrodes, each disposed between adjacent ones of the first electrodes, the second electrodes having first axis gradient field generating shaped electrodes and being coupled to each other by a conductive wiring trace; a plurality of third electrodes, each disposed between adjacent ones of the first electrodes, the third electrodes having first axis gradient field generating shaped electrodes and being coupled to each other by a conductive wiring trace, wherein the first and second electrodes are arranged in co-extending pairs to provide ratiometric capacitive signals as a function of touch position along the first axis. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification