US Patent No. 10,338,759

SENSE ELECTRODE DESIGN


Patent No. 10,338,759
Issue Date July 02, 2019
Title Sense Electrode Design
Inventorship Esat Yilmaz, Santa Cruz, CA (US)
Assignee

Claim of US Patent No. 10,338,759

1. An apparatus, comprising:a touchscreen display comprising:
a layer containing a plurality of substantially transparent longitudinal drive electrodes separated from each other by a gap;
a layer containing a plurality of substantially transparent sense electrodes formed in the shape of spines running transverse to the drive electrodes; wherein each sense electrode spine comprises an end to couple to drive lines and a plurality of crossbars that generally run in the same direction as the drive electrodes;
a first plurality of conductive drive lines electrically connected to the plurality of drive electrodes;
a second plurality of conductive drive lines electrically connected to the plurality of sense electrodes;
a dielectric layer separating the layer of drive electrodes from the layer of sense electrodes; and
an underlying display configured to produce an image;
wherein the plurality of sense electrodes comprises at least two sense electrode spines wherein a first sense electrode spine is connected to drive lines at a first end of the first sense electrode spine, and a second sense electrode spine is connected to drive lines at a second end of the second sense electrode spine; wherein the first end and second end are on opposite sides;
wherein the first sense electrode spine and the second sense electrode spine are adjacent to each other;
wherein the plurality of crossbars generally increase in width;
wherein the crossbar of the first sense electrode spine that has the largest width runs adjacent to the crossbar of the second sense electrode spine that has the smallest width, and the crossbar of the first sense electrode spine that has the smallest width runs adjacent to the crossbar of the second sense electrode spine that has the largest width;
wherein the crossbar that has the smallest width is located closest to the end to couple to sense circuitry and the crossbar that has the largest width is located furthest away from the end to couple to sense circuitry; and
sense circuitry connected to the first and second plurality of conductive drive lines; the sense circuitry configured to detect and process the change in capacitance at one or more touch-sensor nodes to determine the presence and location of a touch input.