US 12,260,045 B2
Architecture for differential drive and sense for touch sensor panel
Sagar R. Vaze, San Jose, CA (US); and Marduke Yousefpor, San Jose, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Sep. 20, 2022, as Appl. No. 17/933,808.
Claims priority of provisional application 63/261,624, filed on Sep. 24, 2021.
Prior Publication US 2023/0099369 A1, Mar. 30, 2023
Int. Cl. G06F 3/041 (2006.01); G06F 3/044 (2006.01)
CPC G06F 3/04182 (2019.05) [G06F 3/0445 (2019.05)] 20 Claims
OG exemplary drawing
 
1. A touch sensor panel comprising:
a plurality of touch electrodes including a plurality of first electrodes and a plurality of second electrodes in a first layer, the plurality of touch electrodes forming a two-axis array of touch nodes;
a plurality of first routing traces in a second layer, different from the first layer, the plurality of first routing traces coupled to the first electrodes using a plurality of first electrical interconnections between the first layer and the second layer; and
a plurality of second routing traces in the second layer, the plurality of the second routing traces coupled to the second electrodes using a plurality of second electrical interconnections between the first layer and the second layer;
wherein the plurality of first routing traces is routed along a first axis of the two-axis array and at least partially overlaps the two-axis array of touch nodes; and
wherein the plurality of second traces is routed along the first axis of the two-axis array and at least partially overlaps the two-axis array of touch nodes,
wherein the first electrodes include column electrodes, the second electrodes include row electrodes, and the two-axis array of touch nodes includes a row-column arrangement of touch nodes, and
wherein row electrodes, of the of the row-column arrangement, are connected by routing between the row electrodes.