Capacitive sensor

Patent metadata

Field	Value
Publication number	US-10564010-B2
Application number	US-201715642605-A
Country	US
Kind code	B2
Filing date	Jul 6, 2017
Priority date	Jan 16, 2015
Publication date	Feb 18, 2020
Grant date	Feb 18, 2020

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 of a plurality of detection electrodes arranged with intervals, a plurality of lead-out wirings linearly extending in a first direction from corresponding ones of the detection electrodes, and a resistance-setting section connected to at least any one of the lead-out wirings and including a portion extending in a direction not parallel to the first direction.

First claim

What is claimed is:

1. A capacitive sensor comprising:
a base material provided with a pattern of a light-transmissive conductive film, wherein
the pattern includes:
a detection pattern of a plurality of detection electrodes arranged with intervals;
a plurality of lead-out wirings linearly extending in a first direction from corresponding ones of the detection electrodes; and
a resistance-setting section connected to at least any one of the lead-out wirings including a portion extending in a direction not parallel to the first direction;
a plurality of pairs 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, wherein
the light-transmissive conductive film contains metal nanowires,
the resistance-setting section is formed of a single wiring path and has a fold-back pattern,
the plurality of lead-out wirings have an equal-interval region where the plurality of lead-out wirings are arrayed with a constant first pitch in a second direction orthogonal to the first direction,
the fold-back pattern is juxtaposed with the equal-interval region in the second direction,
the fold-back pattern includes a plurality of linear pattern portions linearly extending in the first direction,
the plurality of detection electrodes are arranged at regular intervals in the first direction,
the linear pattern portions have the same widths as those of corresponding ones of the lead-out wirings, and
the pitch of the linear pattern portions in the second direction is equal to the first pitch.

2. The capacitive sensor according to claim 1 , wherein
the first direction is a direction toward an external terminal region from the detection pattern; and
the resistance-setting section is at least connected to the lead-out wiring extending from the detection electrode closest to the external terminal region.

3. The capacitive sensor according to claim 1 , wherein
the wiring patterns including the plurality of lead-out wirings extending from corresponding ones of the plurality of detection electrodes have the same resistance values.

4. The capacitive sensor according to claim 2 , wherein
the wiring patterns including the plurality of lead-out wirings extending from corresponding ones of the plurality of detection electrodes have the same resistance values.

5. The capacitive sensor according to claim 1 , wherein
the metal nanowires include silver nanowires.

6. The capacitive sensor according to claim 2 , wherein
the metal nanowires include silver nanowires.

7. The capacitive sensor according to claim 3 , wherein
the metal nanowires include silver nanowires.

8. The capacitive sensor according to claim 4 , wherein
the metal nanowires include silver nanowires.

Assignees

• Alps Alpine Co Ltd

Inventors

• Yamai Tomoyuki
• Kitamura Yasuyuki
• Hiraki Yuta
• Ishibashi Setsuo
• Bito Mitsuo
• Yazawa Manabu

Classifications

• G06F3/041

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• H01B5/14

  comprising conductive layers or films on insulating-supports · CPC title

• G01R27/2605

  Measuring capacitance (capacitive sensors G01D5/24) · CPC title

• H03K17/962

  Capacitive touch switches · CPC title

• G01D5/24 Primary

  by varying capacitance · CPC title