Patent ID: 9552115
Date: 2017-01-24
CPC Classifications: G06F

Claim:
1. A method of deriving touch information from a touch sensitive surface, the touch sensitive surface comprising a plurality of sensing points, a sensing point being located at a crossing of a drive line and a sense line, the method comprising: performing a first scan in a first region of the touch sensitive surface to determine whether a touch is present within the first region, the first region corresponding to a first plurality of drive lines, wherein the first scan in the first region comprises: simultaneously stimulating a plurality of drive lines corresponding to the first region with one or more first drive signals; sensing first sense signals on a plurality of sense lines, wherein the first sense signals are related to the one or more first drive signals by touch or proximity of one or more objects to one or more sensing points located at a crossing of the plurality of drive lines and the at least one sense line; and determining whether a touch is present within the first region based on the first sense signals; when the touch is present in the first region, performing a second scan in the first region, wherein performing the second scan in the first region comprises: when the touch is not present in the first region, performing the first scan in a second region of the touch sensitive surface, wherein the second region corresponds to a second plurality of drive lines.