Touch sensor panels with reduced static capacitance

摘要

Capacitive touch panels may include a plurality of positive voltage lines that are driven at a first phase. These positive voltage lines may be used to provide the drive capacitance signal sensed by one or more sense regions. The touch panels may also include a plurality of negative phase voltage lines that are driven at a phase that is different than the first phase. Both the positive and negative voltage lines may cross-under one or more sense regions. The negative phase voltage lines are able to counter act and reduce the static capacitance in the sense regions.

主权项

1. A touch sensitive panel comprising:
a plurality of pixels; a plurality of first voltage lines that are driven at a first phase; a plurality of second voltage lines that are driven at a second phase that is different than the first phase; a plurality of drive regions comprising some of the plurality of pixels arranged in a matrix, each drive region coupled at least to one of the plurality of first voltage lines; and at least one sense region comprising others of the plurality of pixels, arranged in a matrix and disposed between at least a first and a second drive regions of the plurality of drive regions, the plurality of first voltage lines and the plurality of second voltage lines crossing the at least one sense region and electrically isolated therefrom; and wherein the second phase is opposite the first phase and wherein the first phase of the plurality of first voltage lines and the second phase of the plurality of second voltage lines reduce static capacitance in the at least one sense region as compared to a configuration in which the second voltage lines are not utilized.