Abstract:
In one embodiment, a touch sensor includes a first electrode and a second electrode. At least a portion of the second electrode is interdigitated with the first electrode. The first electrode includes a base portion, a digit and an extent. The digit includes a first end and a second end, connects to the base portion at the first end, and extends from the base portion in a first direction along a first axis. The extent connects to the digit at the second end and extends from the digit along a second axis that is substantially perpendicular to the first axis.
Abstract:
In one embodiment, a touch sensor includes a first electrode and a second electrode. At least a portion of the second electrode is interdigitated with the first electrode. The first electrode includes a base portion, a digit and an extent. The digit includes a first end and a second end, connects to the base portion at the first end, and extends from the base portion in a first direction along a first axis. The extent connects to the digit at the second end and extends from the digit along a second axis that is substantially perpendicular to the first axis.
Abstract:
According to one embodiment, a touch sensor has a first edge and a second edge approximately perpendicular to the first edge. The touch sensor includes a first plurality of electrodes approximately parallel to the first edge, a second plurality of electrodes approximately parallel to the second edge, and a first plurality of nodes. Each of the first plurality of nodes are formed by a capacitive coupling between an electrode of the first plurality of electrodes and an electrode of the second plurality of electrodes. The touch sensor further includes a third plurality of electrodes and a second node formed by the third plurality of electrodes. Each of the third plurality of electrodes form a portion of the second node by a self-capacitance coupling. At least one of the portions of the second node is positioned in-between at least two of the first plurality of nodes.
Abstract:
In one embodiment, a touch sensor includes multiple first electrode lines along a first direction. Each of the first electrode lines includes multiple first electrodes. The touch sensor also includes multiple second electrode lines along a second direction substantially perpendicular to the first direction. Each of the second electrode lines includes one second electrode. The second electrode of each of the second electrode lines is interdigitated with one of the first electrodes of each of the first electrode lines. The first and second electrodes are disposed on one side of a substrate.
Abstract:
A device includes a plurality of drive electrodes and a plurality of sense electrodes. The drive electrodes run generally in a first direction and have multiple projections along their length. The sense electrodes run generally in a second direction transverse to the drive electrodes. The sense electrodes have multiple projections interleaved with the multiple projections of the drive electrodes.
Abstract:
A capacitive position sensor has a two-layer electrode structure. Drive electrodes extending in a first direction on a first plane on one side of a substrate. Sense electrodes extend in a second direction on a second plane on the other side of the substrate so that the sense electrodes cross the drive electrodes at a plurality of intersections which collectively form a position sensing array. The sense electrodes are provided with branches extending in the first direction part of the way towards each adjacent sense electrode so that end portions of the branches of adjacent sense electrodes co-extend with each other in the first direction separated by a distance sufficiently small that capacitive coupling to the drive electrode adjacent to the co-extending portion is reduced. Providing sense electrode branches allow a sensor to be made which has a greater extent in the first direction for a given number of sense channels, since the co-extending portions provide an interpolating effect. The number of sense electrode branches per drive electrode can be increased which allows a sensor to be made which has ever greater extent in the first direction without having to increase the number of sense channels.
Abstract:
A capacitive touch sensor wherein the touch sensitive panel has drive electrodes arranged on the lower side of a substrate and sense electrodes arranged on the upper side. The drive electrodes are shaped and dimensioned to substantially entirely cover the touch sensitive area with individual drive electrodes being separated from each other by small gaps, the gaps being so small as to be practically invisible. The near blanket coverage by the drive electrodes also serves to screen out interference from noise sources below the drive electrode layer, such as drive signals for an underlying display, thereby suppressing noise pick-up by the sense electrodes that are positioned above the drive electrodes.