Touch sensing electrode structure and touch sensor including the same
A touch sensing electrode structure includes sensing electrodes, each of which including a plurality of unit patterns, and traces electrically connected to the sensing electrodes. The traces include at least two trace lines and trace bridges connecting the at least two trace lines to each other. An electrode visibility due to a pattern deviation is reduced and a reliability of the trace is improved by the trace bridge.
1. A touch sensing electrode structure, comprising:
sensing electrodes, each of which including a plurality of unit patterns; and
traces electrically connected to the sensing electrodes, the trace including:
at least two trace lines; and
trace bridges connecting the at least two trace lines to each other; and
dummy bridges disposed between neighboring ones of the traces,
wherein each of the sensing electrodes include electrode lines and connecting electrodes connecting the electrode lines to each other, the electrode lines extend in a column direction and a plurality of the electrode lines are arranged along a row direction that is perpendicular to the column direction in each of the sensing electrodes;
the number of the electrode lines neighboring in the row direction in each of the sensing electrode is greater than the number of the trace lines connected to each of the sensing electrode;
the electrode lines and the trace lines have a zigzag line shape extending in the column direction including inflected portions, and the connecting electrodes and the trace bridges are formed at the inflected portions; and
the dummy bridges extend only in the row direction between the inflected portions facing only in the row direction of the trace lines included in the neighboring ones of the traces, the dummy bridges are positioned on an imaginary line between inflected points of the inflected portions neighboring each other, and the dummy bridges are physically and electrically separated from at least one of the inflected portions.
2. The touch sensing electrode structure according to claim 1 , wherein the trace includes a trace unit pattern having a shape the same as that of the unit pattern included in the sensing electrode.
3. The touch sensing electrode structure according to claim 2 , wherein the unit pattern and the trace unit pattern have a concave polygonal shape.
4. The touch sensing electrode structure according to claim 2 , wherein the unit pattern and the trace unit pattern have a parallelogram shape or a rhombus shape.
5. The touch sensing electrode structure according to claim 1 , wherein the traces include a first trace and a second trace neighboring each other, and
the dummy bridges are alternately connected to the first trace and the second trace along an extending direction of the trace.
6. The touch sensing electrode structure according to claim 1 , wherein the dummy bridges include an island pattern isolated between the neighboring ones of the traces.
7. The touch sensing electrode structure according to claim 1 , wherein a dummy unit pattern is defined by the dummy bridges and the trace lines adjacent to the dummy bridges.
8. The touch sensing electrode structure according to claim 7 , wherein the dummy unit pattern has a shape the same as that of the unit pattern included in the sensing electrode except that the dummy unit pattern has a cut portion in at least a portion thereof.
9. The touch sensing electrode structure according to claim 1 , wherein the trace line and the electrode line have the same shape.
10. The touch sensing electrode structure according to claim 1 , wherein the sensing electrode and the trace include the same transparent conductive oxide or the same metal.
11. A touch sensor, comprising:
a substrate layer; and
the touch sensing electrode structure of claim 1 on the substrate layer.
12. An image display device including the touch sensor of claim 11 .