Systems and methods for detecting multiple touch points in surface-capacitance type touch panels

摘要

A multi touch sensing module comprising a plurality of electrically conductive touch surfaces, each connected to at least one trace, wherein the touch surfaces are arranged in more than two columns, each including more than two touch surfaces, wherein touch surfaces in corresponding positions in said columns form staggered rows, and all touch surfaces reside in a single layer of electrically conductive material.

主权项

1. A multi touch sensing module comprising:a plurality of electrically conductive touch surfaces, each connected to at least one trace, wherein the touch surfaces are arranged in more than two columns, each including more than 2 touch surfaces, wherein touch surfaces in corresponding positions in said columns form staggered rows, and all touch surfaces reside in a single layer of electrically conductive material,
the module also comprising: a contact sensing device including touch sensors operative to sense contact between a touching object and at least one of the plurality of electrically conductive touch surfaces; and a processing unit, connected to the co act sensing device, which is operative for: reading self-capacitance measurements generated by the contact sensing device, and resolving the touch sensor measurements into multiple locations of respective multiple objects which have come into contact with the touch surfaces, wherein said resolving comprises compensating for possible distortion caused by staggering between linear arrays of touch surfaces, by converting readings of sensors connected to touch surfaces into a matrix of computed theoretical capacitance readings of virtual surfaces partitioned from the touch surfaces to form non-staggered rows of surfaces.