Double-sided touch-sensitive panel with shield and drive combined layer
First Claim
1. A touch sensor panel, comprising:
- a first set of co-planar traces of conductive material, a total surface area of the first set of co-planar traces defining a first surface area; and
a second set of co-planar traces of the conductive material formed on a different plane from the first set of co-planar traces, the total surface area of the second set of co-planar traces defining a second surface area;
wherein the second surface area is substantially greater than the first surface area to provide shielding from display interference for the first set of co-planar traces.
0 Assignments
0 Petitions
Accused Products
Abstract
A multi-touch capacitive touch sensor panel can be created using a substrate with column and row traces formed on either side of the substrate. To shield the column (sense) traces from the effects of capacitive coupling from a modulated Vcom layer in an adjacent liquid crystal display (LCD) or any source of capacitive coupling, the row traces can be widened to shield the column traces, and the row traces can be placed closer to the LCD. In particular, the rows can be widened so that there is spacing of about 30 microns between adjacent row traces. In this manner, the row traces can serve the dual functions of driving the touch sensor panel, and also the function of shielding the more sensitive column (sense) traces from the effects of capacitive coupling.
108 Citations
21 Claims
-
1. A touch sensor panel, comprising:
-
a first set of co-planar traces of conductive material, a total surface area of the first set of co-planar traces defining a first surface area; and a second set of co-planar traces of the conductive material formed on a different plane from the first set of co-planar traces, the total surface area of the second set of co-planar traces defining a second surface area; wherein the second surface area is substantially greater than the first surface area to provide shielding from display interference for the first set of co-planar traces. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A touch sensor panel, comprising:
-
a plurality of sense traces of conductive material having a total surface area defining a first surface area; and a plurality of drive traces of the conductive material spatially separated from the plurality of sense traces, the plurality of drive traces having a total surface area defining a second surface area; wherein the second surface area is substantially greater than the first surface area to provide shielding from display interference for the plurality of sense traces. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
-
15. A method for shielding a touch sensor panel, comprising:
-
interposing a second layer of conductive material including a plurality of second traces between a first layer of the conductive material including a plurality of first traces and a noise source, the plurality of second traces having a total surface area defining a second surface area and the plurality of first traces having a total surface area defining a first surface area; and configuring the plurality of second traces such that the second surface area is substantially greater than the first surface area to provide shielding from display interference for the plurality of first traces. - View Dependent Claims (16, 17, 18)
-
-
19. A computing device, comprising:
-
a circuit capable of emitting electromagnetic interference; a touch sensor panel coupled to the circuit, the touch sensor panel including a plurality of sense traces of conductive material having a total surface area defining a first surface area, and a plurality of drive traces of the conductive material spatially separated from the plurality of sense traces, the plurality of drive traces having a total surface area defining a second surface area, wherein the second surface area is substantially greater than the first surface area to provide shielding from display interference for the plurality of sense traces; and a panel subsystem controller coupled to the touch sensor panel, the panel subsystem controller configured for sending stimulation signals to the plurality of drive traces and receiving sense signals from the plurality of sense traces. - View Dependent Claims (20, 21)
-
Specification