Touch sensor and touch panel
A thin touch panel is provided. A touch panel with a simple structure is provided. The number of components of a touch panel is reduced. Each of a pair of wirings of a touch sensor is positioned closer to a substrate supporting light-emitting elements than a common electrode is, and includes a portion positioned between two adjacent pixel electrodes in a plan view. Furthermore, an island-like structure body with an inverse tapered shape is provided over each of the pair of wirings. A conductive layer in an electrically floating state is provided over the structure body. Each conductive layer has a portion overlapping with one of the pair of wirings. Moreover, the conductive layer and the common electrode are formed using the same conductive film.
1. A touch sensor comprising:
a first wiring and a second wiring;
a structure body above the first wiring;
a conductive layer above the structure body; and
a light-emitting element comprising a first electrode, an EL layer above the first electrode, and a second electrode above the EL layer,
wherein the structure body has an inverse tapered shape,
wherein the conductive layer overlaps with the structure body and the first wiring,
wherein the conductive layer, the first wiring, and the second wiring have capacitive coupling, and
wherein the first wiring and the second wiring function as a pair of electrodes of the touch sensor.
2. The touch panel according to claim 1 ,
wherein the conductive layer is in a floating state.
3. The touch panel according to claim 1 ,
wherein a taper angle of a side surface of the structure body is greater than 90 degrees.
4. The touch panel according to claim 1 ,
wherein the structure body has an insulating property.
5. The touch panel according to claim 1 ,
wherein the structure body has conductivity.
6. A touch sensor comprising:
a first wiring;
a second wiring;
a first structure body over the first wiring;
a second structure body over the second wiring;
a first conductive layer above the first structure body;
a second conductive layer above the second structure body; and
a light-emitting element comprising a first electrode, an EL layer over the first electrode, and a second electrode over the EL layer,
wherein the first structure body has a portion overlapping with the first wiring and has an inverse tapered shape,
wherein the second structure body has a portion overlapping with the second wiring and has an inverse tapered shape,
wherein the first conductive layer has a portion overlapping with the first structure body and the first wiring and is in a floating state,
wherein the second conductive layer has a portion overlapping with the second structure body and the second wiring and is in a floating state,
wherein the first conductive layer and the first wiring have capacitive coupling, the second conductive layer and the second wiring have capacitive coupling, and the first conductive layer and the second conductive layer have capacitive coupling,
wherein the first conductive layer, the second conductive layer, and the second electrode are formed from a same layer,
wherein the second electrode is between the first structure body and the second structure body, and
wherein the first wiring and the second wiring function as a pair of electrodes of the touch sensor.
7. The touch panel according to claim 6 ,
wherein a taper angle of a side surface of the first structure body and a taper angle of a side surface of the second structure body are greater than 90 degrees.
8. The touch panel according to claim 6 ,
wherein the first structure body and the second structure body have an insulating property.
9. The touch panel according to claim 6 ,
wherein the first structure body and the second structure body have conductivity.