Capacitive sensor
First Claim
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1. A capacitive sensor comprising:
- a base material provided with a pattern of a light-transmissive conductive film, whereinthe light-transmissive conductive film has a structure in which metal nanowires are dispersed in a binder; and
the pattern includes;
a detection pattern of a plurality of detection electrodes arranged with intervals; and
a plurality of lead-out wirings linearly extending in a first direction from corresponding ones of the plurality of the detection electrodes, whereinat least one of the detection electrodes of the detection pattern includes a current path-setting section for elongating a linear path length of a current from the detection electrode toward the lead-out wiring;
the current path-setting section includes a slit pattern disposed to obstruct the linear path length of the current;
the current path-setting section includes a plurality of slit patterns having a length of a half or more of the length of the detection electrode and restricting the current path;
the plurality of the slit patterns are disposed parallel to each other;
at least a part of the plurality of the slit patterns inward extends from the end of the detection electrode; and
adjacent ones of the slit patterns restrict the current path at positions different from each other;
the current path-setting section includes a wiring path that allows the path of current flowing from the detection electrode toward the lead-out wiring to meander;
at least one of the detection electrodes including the current path-setting section and the lead-out wiring extending therefrom have a structure in which the metal nanowires are dispersed in a binder and are formed in a detection region;
the plurality of the detection electrodes are arranged in the first direction;
a plurality of pair of one of the detection electrodes and one of the lead-out wirings extending from corresponding one of the detection electrodes are formed so as to be separated from each other;
the plurality of the lead-out wirings in the detection region include an equal-interval region where the lead-out wirings are arrayed with a constant first pitch in a second direction orthogonal to the first direction;
the plurality of the slit patterns have widths equal to the intervals of the plurality of the lead-out wirings; and
the pitch of the plurality of the slit patterns is equal to the first pitch.
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Abstract
A capacitive sensor includes a base material provided with a pattern of a light-transmissive conductive film. The light-transmissive conductive film contains metal nanowires. The pattern includes a detection pattern formed of a plurality of detection electrodes arranged with intervals and a plurality of lead-out wirings linearly extending in a first direction from the corresponding ones of the plurality of the detection electrodes. At least one of the detection electrodes of the detection pattern includes a current path-setting section for elongating the linear path length of the current from the detection electrode toward the lead-out wiring.
15 Citations
9 Claims
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1. A capacitive sensor comprising:
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a base material provided with a pattern of a light-transmissive conductive film, wherein the light-transmissive conductive film has a structure in which metal nanowires are dispersed in a binder; and the pattern includes; a detection pattern of a plurality of detection electrodes arranged with intervals; and a plurality of lead-out wirings linearly extending in a first direction from corresponding ones of the plurality of the detection electrodes, wherein at least one of the detection electrodes of the detection pattern includes a current path-setting section for elongating a linear path length of a current from the detection electrode toward the lead-out wiring; the current path-setting section includes a slit pattern disposed to obstruct the linear path length of the current; the current path-setting section includes a plurality of slit patterns having a length of a half or more of the length of the detection electrode and restricting the current path; the plurality of the slit patterns are disposed parallel to each other; at least a part of the plurality of the slit patterns inward extends from the end of the detection electrode; and adjacent ones of the slit patterns restrict the current path at positions different from each other; the current path-setting section includes a wiring path that allows the path of current flowing from the detection electrode toward the lead-out wiring to meander; at least one of the detection electrodes including the current path-setting section and the lead-out wiring extending therefrom have a structure in which the metal nanowires are dispersed in a binder and are formed in a detection region; the plurality of the detection electrodes are arranged in the first direction; a plurality of pair of one of the detection electrodes and one of the lead-out wirings extending from corresponding one of the detection electrodes are formed so as to be separated from each other; the plurality of the lead-out wirings in the detection region include an equal-interval region where the lead-out wirings are arrayed with a constant first pitch in a second direction orthogonal to the first direction; the plurality of the slit patterns have widths equal to the intervals of the plurality of the lead-out wirings; and the pitch of the plurality of the slit patterns is equal to the first pitch. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
the current path-setting section is at least disposed to the detection electrode closest to the external terminal region.
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3. The capacitive sensor according to claim 2, wherein the current path-setting section is disposed to each of the plurality of the detection electrodes.
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4. The capacitive sensor according to claim 3, wherein the metal nanowires include silver nanowires.
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5. The capacitive sensor according to claim 2, wherein the metal nanowires include silver nanowires.
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6. The capacitive sensor according to claim 1, wherein the current path-setting section is disposed to each of the plurality of the detection electrodes.
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7. The capacitive sensor according to claim 6, wherein the metal nanowires include silver nanowires.
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8. The capacitive sensor according to claim 1, wherein the metal nanowires include silver nanowires.
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9. A capacitive sensor comprising:
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a base material provided with a pattern of a light-transmissive conductive film, wherein the light-transmissive conductive film contains metal nanowires; and the pattern includes; a detection pattern of a plurality of detection electrodes arranged with intervals; and a plurality of lead-out wirings linearly extending in a first direction from corresponding ones of the plurality of the detection electrodes, wherein at least one of the detection electrodes of the detection pattern includes a current path-setting section for elongating a linear path length of a current from the detection electrode toward the lead-out wiring; the current path-setting section includes a slit pattern disposed for obstructing the linear path length of the current; and the current path-setting section includes a plurality of slit patterns having a length of a half or more of the length of the detection electrode and restricting the current path; the plurality of the slit patterns are disposed parallel to each other; at least a part of the plurality of the slit patterns inward extends from the end of the detection electrode; adjacent ones of the slit patterns restrict the current path at positions different from each other; the current path-setting section includes a wiring path that allows the path of current flowing from the detection electrode toward the lead-out wiring to meander; the plurality of the detection electrodes are arranged in the first direction; a plurality of pair of one of the detection electrodes and one of the lead-out wirings extending from corresponding one of the detection electrodes are formed so as to be separated from each other, the plurality of the lead-out wirings in the detection region include an equal-interval region where the lead-out wirings are arrayed with a constant first pitch in a second direction orthogonal to the first direction; the plurality of the slit patterns have widths equal to the intervals of the plurality of the lead-out wirings; and the pitch of the plurality of the slit patterns is equal to the first pitch.
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Specification