Single-layer touch sensor
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.
1. A touch sensor comprising:
a first electrode that comprises:
a first base portion;
a second base portion that connects to the first base portion and extends from the first base portion in a first direction;
a third base portion that connects to the second base portion and extends from the second based portion in a second direction;
a digit that comprises a first end and a second end, connects to the first base portion at the first end of the digit, and extends from the first base portion in the first direction along a first axis, wherein the first base portion extends along a second axis; and
an extent that connects to the digit at the second end and extends from the digit along a third axis that is substantially perpendicular to the first axis; and
a second electrode comprising:
a base portion extending along the second axis; and
a digit that comprises a first end having a first width and a second end having a second width, the first width being different than the second width, wherein the digit of the second electrode:
connects to the base portion of the second electrode at the first end of the digit of the second electrode;
extends from the base portion of the second electrode; and
is at least partially interdigitated with the digit of the first electrode.
2. The touch sensor of claim 1 , wherein the first electrode is a drive electrode and the second electrode is a sense electrode.
3. The touch sensor of claim 1 ,
wherein
the digit of the first electrode extends substantially perpendicular to the first base portion of the first electrode.
4. The touch sensor of claim 1 , wherein the third base portion extends along the third axis.
5. The touch sensor of claim 1 , wherein:
the first electrode composes a first electrode line extending along the second axis; and
the second electrode is one of a plurality of second electrodes composing a second electrode line extending along the first axis.
6. The touch sensor of claim 5 , wherein the first electrode:
comprises a plurality of base portions that are each connected to at least one adjacent base portion; and
extends along the second axis in a serpentine pattern.
7. The touch sensor of claim 1 , wherein the first electrode comprises a plurality of digits that extend from the base portion in the first direction along the first axis.
8. The touch sensor of claim 1 , wherein the first width of the digit of the second electrode is smaller than the second width of digit of the second electrode.
9. The touch sensor of claim 1 , wherein the first and second electrodes are each made of a mesh of fine lines of conductive material.
10. The touch sensor of claim 1 , wherein the first and second electrodes are each made of indium tin oxide (ITO).
11. A device comprising:
a touch sensor comprising:
a first electrode that comprises:
a first base portion;
a second base portion that connects to the first base portion and extends from the first base portion in a first direction;
a third base portion that connects to the second base portion and extends from the second based portion in a second direction;
a digit that comprises a first end and a second end, connects to the first base portion at the first end of the digit, and extends from the first base portion in the first direction along a first axis, wherein the first base portion extends along a second axis; and
an extent that connects to the digit at the second end and extends from the digit along a third axis that is substantially perpendicular to the first axis; and
a second electrode comprising:
a base portion extending along the second axis; and
a digit that comprises a first end having a first width and a second end having a second width, the first width being different than the second width, wherein the digit of the second electrode:
connects to the base portion of the second electrode at the first end of the digit of the second electrode;
extends from the base portion of the second electrode; and
is at least partially interdigitated with the digit of the first electrode; and
one or more computer-readable non-transitory storage media comprising logic that is configured when executed to control the touch sensor.
12. The device of claim 11 , wherein the first electrode is a drive electrode and the second electrode is a sense electrode.
13. The device of claim 11 ,
wherein
the digit of the first electrode extends substantially perpendicular to the first base portion of the first electrode.
14. The device of claim 11 , wherein the third base portion extends along the third axis.
15. The device of claim 11 , wherein:
the first electrode composes a first electrode line extending along the second axis; and
the second electrode is one of a plurality of second electrodes composing a second electrode line extending along the first axis.
16. The device of claim 15 , wherein the first electrode:
comprises a plurality of base portions that are each connected to at least one adjacent base portion; and
extends along the second axis in a serpentine pattern.
17. The device of claim 11 , wherein the first electrode comprises a plurality of digits that extend from the base portion in the first direction along the first axis.
18. The device of claim 11 , wherein the first width of the digit of the second electrode is smaller than the second width of digit of the second electrode.
19. The device of claim 11 , wherein the first and second electrodes are each made of a mesh of fine lines of conductive material.
20. The device of claim 11 , wherein the first and second electrodes are each made of indium tin oxide (ITO).