Touch panel with non-uniform touch node layout
This relates to a touch sensor panel including: a substrate having a first surface and a second surface; a first touch node formed by a first drive line and a first section of a first sense line both routed on the first surface of the substrate; and a second touch node formed by a second drive line routed on the first surface of the substrate and a second section of the first sense line routed on the second surface of the substrate.
1. A touch sensor panel comprising:
a substrate having a first surface and a second surface;
a first touch node formed by a first drive line and a first section of a first sense line both routed on the first surface of the substrate; and
a second touch node formed by a second drive line routed on the first surface of the substrate and a second section of the first sense line at a terminal end of the first sense line routed on the second surface of the substrate.
2. The touch sensor panel of claim 1 , comprising:
a via configured for routing the sense line from the first surface to the second surface.
3. The touch sensor panel of claim 1 , comprising:
a surface-mounted (SMT) component mounted on the first surface of the substrate, wherein the second touch node is located adjacent to the SMT component.
4. The touch sensor panel of claim 1 , comprising a second sense line routed entirely on the first surface of the substrate and forming touch nodes with the first and second drive lines.
5. The touch sensor panel of claim 4 , wherein the second sense line and the first and second drive lines are routed in an interdigitated pattern.
6. The touch sensor panel of claim 1 , comprising:
at least a plurality of routing traces each connecting one of the drive lines to a touch controller,
wherein the routing traces are routed on the second surface of the substrate.
7. The touch sensor panel of claim 6 , wherein an end of each of the routing traces is connected to one of the drive lines on the first surface through a via in the substrate.
8. The touch sensor panel of claim 6 , wherein the routing traces are electrically shielded from the first sense line.