Split sense lines for negative pixel compensation

摘要

A touch panel configured to compensate for negative pixel effect is disclosed. The panel can be configured to increase a capacitive sense signal, indicative of a touching or hovering object, in order to compensate for an increase in negative capacitance when the object is poorly grounded. To perform the compensation, the panel can be configured to have split sense lines so as to increase the number of electric fringe fields forming the sense signal, thereby providing a sense signal that is substantially stronger than the negative capacitance signal. Each sense line can be split into two or more strips.

主权项

1. A touch panel comprising: a sense line split into multiple strips, the strips configured to form a first capacitance indicative of a proximity of an object to the panel and a second capacitance indicative of a grounding condition of the object, the first capacitance being substantially larger than the second capacitance so as to compensate for negative pixel effect at the panel, wherein the strips of the sense line are directly coupled together at distal ends.