Touch screen, touch panel, display device, and electronic apparatus
It is an object of the present invention to reduce an offset of an electrostatic capacitance and suppress a bias of detection sensitivity in a touch screen having a narrowed frame. A touch screen of the present invention includes a plurality of detection row wirings extending in a row direction, a plurality of detection column wirings, a plurality of lead wirings electrically connecting the plurality of detection row wirings and the plurality of detection column wirings to a terminal and being disposed to be drawn close to each other, and an outermost peripheral shielded wiring which surrounds the detection area along a further outer side of the outermost lead wirings and is connected to the terminal. There is a region which does not include an interlayer insulating film in a region between the detection area or the plurality of lead wirings and the outermost peripheral shielded wiring.
1. A touch screen, comprising:
a substrate;
a plurality of detection row wirings extending in a row direction on the substrate, every part of a respective row wiring is extending in a longitudinal direction of the respective row wiring;
a plurality of detection column wirings extending in a column direction on the substrate, every part of a respective column wiring is extending in a longitudinal direction of the respective column wiring, which is substantially perpendicular to the longitudinal direction of the respective row wiring, and the respective column wiring includes an intersection portion that is three-dimensionally overlapping with an intersection portion of the respective detection row wiring of the plurality of detection row wirings in a plan view, a range of the intersection portions of the plurality of detection row wirings and the plurality of detection column wirings defines a detection area;
a terminal configured to be electrically connected to an external device;
a plurality of lead wirings electrically connecting the plurality of detection row wirings and the plurality of detection column wirings to the terminal and being disposed to be drawn close to each other;
a shielded wiring which surrounds the detection area along a further outer side of an outermost lead wirings in the plurality of lead wirings and is connected to the terminal; and
an interlayer insulating film insulating the plurality of detection row wirings, the plurality of detection column wirings, the plurality of lead wirings, and the shielded wiring, from each other, wherein
a region between the detection area and the shielded wiring, or a region between the outermost lead wiring and the shielded wiring includes a region which does not have the interlayer insulating film, the region which does not have the interlayer insulating film includes a region where the lead wiring is not formed.
2. The touch screen according to claim 1 , wherein
the plurality of lead wirings are connected to first ends of the plurality of detection row wirings and first ends of the plurality of detection column wirings, and
the region which does not have the interlayer insulating film is included at least in one of
a region between an outermost lead wiring in the plurality of lead wirings being connected to the plurality of detection row wirings and the shielded wiring,
a region between an outermost lead wiring in the plurality of lead wirings being connected to the plurality of detection column wirings and the shielded wiring,
a region between second ends of the plurality of detection row wirings to which the lead wirings are not connected and the shielded wiring, and
a region between second ends of the plurality of detection column wirings to which the lead wirings are not connected and the shielded wiring.
3. The touch screen according to claim 2 , wherein
each of the detection row wirings and each of the detection column wirings are arranged in a meshed pattern.
4. A touch panel, comprising:
the touch screen according to claim 3 ; and
a touch position detection circuit which detects a position on the touch screen indicated by an indicator, which performs indication on the touch screen, based on an electrostatic capacitance between the indicator and the detection row wirings and detection column wirings.
5. A display device, comprising:
the touch panel according to claim 4 ; and
a display module being disposed on an opposite side of the touch screen of the touch panel on which the indication is performed.
6. An electronic apparatus, comprising:
the touch panel according to claim 4 ; and
an electronic processing unit electrically performing processing being predetermined for information of the position detected by the touch position detection circuit of the touch panel.
7. A touch panel, comprising:
the touch screen according to claim 2 ; and
a touch position detection circuit which detects a position on the touch screen indicated by an indicator, which performs indication on the touch screen, based on an electrostatic capacitance between the indicator and the detection row wirings and detection column wirings.
8. A display device, comprising:
the touch panel according to claim 7 ; and
a display module being disposed on an opposite side of the touch screen of the touch panel on which the indication is performed.
9. An electronic apparatus, comprising:
the touch panel according to claim 7 ; and
an electronic processing unit electrically performing processing being predetermined for information of the position detected by the touch position detection circuit of the touch panel.
10. The touch screen according to claim 1 , wherein
each of the detection row wirings and each of the detection column wirings are arranged in a meshed pattern.
11. A touch panel, comprising:
the touch screen according to claim 10 ; and
a touch position detection circuit which detects a position on the touch screen indicated by an indicator, which performs indication on the touch screen, based on an electrostatic capacitance between the indicator and the detection row wirings and detection column wirings.
12. A display device, comprising:
the touch panel according to claim 11 ; and
a display module being disposed on an opposite side of the touch screen of the touch panel on which the indication is performed.
13. An electronic apparatus, comprising:
the touch panel according to claim 11 ; and
an electronic processing unit electrically performing processing being predetermined for information of the position detected by the touch position detection circuit of the touch panel.
14. A touch panel, comprising:
the touch screen according to claim 1 ; and
a touch position detection circuit which detects a position on the touch screen indicated by an indicator, which performs indication on the touch screen, based on an electrostatic capacitance between the indicator and the detection row wirings and detection column wirings.
15. A display device, comprising:
the touch panel according to claim 14 ; and
a display module being disposed on an opposite side of the touch screen of the touch panel on which the indication is performed.
16. An electronic apparatus, comprising:
the touch panel according to claim 14 ; and
an electronic processing unit electrically performing processing being predetermined for information of the position detected by the touch position detection circuit of the touch panel.