US-20260126879-A1 - INPUT DEVICE

US20260126879A1US 20260126879 A1US20260126879 A1US 20260126879A1US-20260126879-A1

Abstract

An input device is provided and includes substrate; first metal mesh shape electrodes provided on layer of substrate; second metal mesh shape electrodes provided on same layer of the substrate as first metal mesh shape electrodes; second metal connection electrodes each of which connects adjacent two of second metal mesh shape electrodes on same layer as first metal mesh shape electrodes; insulating film covering second metal connection electrodes; first transparent connection electrodes each of which connects adjacent two of first metal mesh shape electrodes on insulating film; and protective film covering first metal mesh shape electrodes, second metal mesh shape electrodes, and first transparent connection electrodes.

Inventors

Koji Ishizaki
Hayato Kurasawa
Hiroshi Mizuhashi

Assignees

MAGNOLIA WHITE CORPORATION

Dates

Publication Date: 20260507
Application Date: 20251107
Priority Date: 20150723

Claims (20)

1 . A display device comprising: a first insulating layer having a first main surface; a second insulating layer having a second main surface and a third main surface on an opposite side of the second main surface; a plurality of pixels which are provided on the first main surface of the first insulating layer; and a plurality of first electrodes and a plurality of second electrodes which are provided on the third main surface of the second insulating layer, wherein the first main surface of the first insulating layer is opposite to the second main surface of the second insulating layer, wherein each of the plurality of first electrodes extends along a first direction and is arranged in a second direction intersecting with the first direction in a planar view, wherein each of the plurality of second electrodes extends along the second direction and is arranged in the first direction in a planar view, wherein each of the plurality of first electrodes includes: a plurality of first electrode portions which are arranged in the first direction in a planar view; and a plurality of first connection portions having a mesh pattern each of which electrically connects the two first electrode portions adjacent to each other in the first direction, wherein each of the plurality of second electrodes includes: a plurality of second electrode portions which are arranged in the second direction in a planar view; and a plurality of second connection portions each of which electrically connects the two second electrode portions adjacent to each other in the second direction, wherein any one of the plurality of first connection portions is overlapped with any one of a plurality of first insulating potions of a third insulating layer, wherein each of the plurality of first insulating potions has tapered side surface, wherein any one of the plurality of second electrode portions is partially overlapped with any one of a plurality of second insulating potions of the third insulating layer, wherein each of the plurality of second insulating potions has a tapered side surface, and a top surface, and wherein any one of the plurality of second connection portions is placed on any one of the plurality of first insulating potions, on the tapered side surface of any one of the plurality of second insulating potions, and on the top surface of any one of the plurality of second insulating potions.
2 . The display device according to claim 1 , wherein each of the plurality of first electrode portions contains metal or alloy, and has a mesh shape, and wherein each of the plurality of second electrode portions contains metal or alloy, and has a mesh shape.
3 . The display device according to claim 1 , wherein each of the first electrode portion and the second electrode portion has a light shielding property.
4 . The display device according to claim 1 , wherein the plurality of first electrode portions, and the plurality of second electrode portions and the plurality of second connection portions are formed on the third main surface of the second insulating layer, wherein the display further includes a first insulating film that covers any one of the plurality of second connection portions, wherein any one of the plurality of first connection portions steps over any one of the second connection portions via a first insulating film, wherein each of the plurality of first connection portions is composed of a first transparent conductive film, and wherein each of the plurality of second connection portions is composed of a first light-shielding film containing metal or alloy.
5 . The display device according to claim 4 , wherein the first light-shielding film includes: a first conductive film which is composed of a first metal film or a first alloy film formed on the third main surface of the second insulating layer; and a first antireflection film which is formed on the first conductive film, and prevents light from being reflected on an upper surface of the first conductive film.
6 . The display device according to claim 4 , further comprising: a second insulating film which covers any one of the plurality of first electrode portions; and a third electrode portion that is formed on any one of the first electrode portions via the second insulating film, wherein the third electrode portion is composed of a second transparent conductive film.
7 . The display device according to claim 1 , wherein the plurality of first electrode portions, second electrode portions, first connection portions and second connection portions are formed on the third main surface of the second insulating layer, wherein the display further includes a third insulating film that covers any one of the plurality of first connection portions, wherein each of the plurality of first connection portions is composed of a third transparent conductive film, wherein each of the plurality of second connection portions is composed of second light-shielding film containing metal or alloy, wherein any one of the plurality of second connection portions steps over any one of the first connection portions via the third insulating film, and wherein the second light-shielding film includes: a second conductive film which is composed of a second metal film or a second alloy film formed on the third main surface of the second insulating layer; and a second antireflection film which is formed on the second conductive film, and prevents light from being reflected on an upper surface of the second conductive film.
8 . The display device according to claim 7 , further comprising: a fourth insulating film which is formed between any one of the plurality of first electrode portions and the third main surface of the second insulating layer; and a fourth electrode portion which is formed between the fourth insulating film and the third main surface of the second insulating layer, wherein the fourth electrode portion is composed of a fourth transparent conductive film.
9 . The display device according to claim 8 , wherein an input position is detected using a detection value of the first electrode based on a third signal which is a drive signal for touch detection, and wherein a fourth signal having a same potential or a same phase as the third signal is input to the fourth electrode portion when the third signal is input to any one of the first electrode portion and the second electrode portion.
10 . The display device according to claim 4 , wherein each of the plurality of first electrodes includes a plurality of first terminal portions each of which is electrically connected to each of the plurality of first electrode portions, wherein each of the plurality of first electrode portions has a mesh shape which is formed of a plurality of first conductive lines and a plurality of second conductive lines intersecting with each other, wherein each of the plurality of first connection portions electrically connects the two first terminal portions which are electrically connected respectively to the two first electrode portions, and wherein a first width of the first terminal portion in the first direction is wider than a second width of the first conductive line in the first direction and a third width of the second conductive line in the first direction.
11 . A touch panel comprising: a first insulating layer having a first main surface; a second insulating layer having a second main surface and a third main surface on an opposite side of the second main surface; a plurality of pixels which are provided on the first main surface of the first insulating layer; and a plurality of first electrodes and a plurality of second electrodes which are provided on the third main surface of the second insulating layer, wherein the first main surface of the first insulating layer is opposite to the second main surface of the second insulating layer, wherein each of the plurality of first electrodes extends along a first direction and is arranged in a second direction intersecting with the first direction in a planar view, wherein each of the plurality of second electrodes extends along the second direction and is arranged in the first direction in a planar view, wherein each of the plurality of first electrodes includes: a plurality of first electrode portions which are arranged in the first direction in a planar view; and a plurality of first connection portions having a mesh pattern each of which electrically connects the two first electrode portions adjacent to each other in the first direction, wherein each of the plurality of second electrodes includes: a plurality of second electrode portions which are arranged in the second direction in a planar view; and a plurality of second connection portions each of which electrically connects the two second electrode portions adjacent to each other in the second direction, wherein any one of the plurality of first connection portions is overlapped with any one of a plurality of first insulating potions of a third insulating layer, wherein each of the plurality of first insulating potions has tapered side surface, wherein any one of the plurality of second electrode portions is partially overlapped with any one of a plurality of second insulating potions of the third insulating layer, wherein each of the plurality of second insulating potions has a tapered side surface, and a top surface, and wherein any one of the plurality of second connection portions is placed on any one of the plurality of first insulating potions, on the tapered side surface of any one of the plurality of second insulating potions, and on the top surface of any one of the plurality of second insulating potions.
12 . The touch panel according to claim 11 , wherein each of the plurality of first electrode portions contains metal or alloy, and has a mesh shape, and wherein each of the plurality of second electrode portions contains metal or alloy, and has a mesh shape.
13 . The touch panel according to claim 11 , wherein each of the first electrode portion and the second electrode portion has a light shielding property.
14 . The touch panel according to claim 11 , wherein the plurality of first electrode portions, and the plurality of second electrode portions and the plurality of second connection portions are formed on the third main surface of the second insulating layer, wherein the display further includes a first insulating film that covers any one of the plurality of second connection portions, wherein any one of the plurality of first connection portions steps over any one of the second connection portions via a first insulating film, wherein each of the plurality of first connection portions is composed of a first transparent conductive film, and wherein each of the plurality of second connection portions is composed of a first light-shielding film containing metal or alloy.
15 . The touch panel according to claim 14 , wherein the first light-shielding film includes: a first conductive film which is composed of a first metal film or a first alloy film formed on the third main surface of the second insulating layer; and a first antireflection film which is formed on the first conductive film, and prevents light from being reflected on an upper surface of the first conductive film.
16 . The touch panel according to claim 14 , further comprising: a second insulating film which covers any one of the plurality of first electrode portions; and a third electrode portion that is formed on any one of the first electrode portions via the second insulating film, wherein the third electrode portion is composed of a second transparent conductive film.
17 . The touch panel according to claim 11 , wherein the plurality of first electrode portions, second electrode portions, first connection portions and second connection portions are formed on the third main surface of the second insulating layer, wherein the display further includes a third insulating film that covers any one of the plurality of first connection portions, wherein each of the plurality of first connection portions is composed of a third transparent conductive film, wherein each of the plurality of second connection portions is composed of second light-shielding film containing metal or alloy, wherein any one of the plurality of second connection portions steps over any one of the first connection portions via the third insulating film, and wherein the second light-shielding film includes: a second conductive film which is composed of a second metal film or a second alloy film formed on the third main surface of the second insulating layer; and a second antireflection film which is formed on the second conductive film, and prevents light from being reflected on an upper surface of the second conductive film.
18 . The touch panel according to claim 17 , further comprising: a fourth insulating film which is formed between any one of the plurality of first electrode portions and the third main surface of the second insulating layer; and a fourth electrode portion which is formed between the fourth insulating film and the third main surface of the second insulating layer, wherein the fourth electrode portion is composed of a fourth transparent conductive film.
19 . The touch panel according to claim 18 , wherein an input position is detected using a detection value of the first electrode based on a third signal which is a drive signal for touch detection, and wherein a fourth signal having a same potential or a same phase as the third signal is input to the fourth electrode portion when the third signal is input to any one of the first electrode portion and the second electrode portion.
20 . The touch panel according to claim 14 , wherein each of the plurality of first electrodes includes a plurality of first terminal portions each of which is electrically connected to each of the plurality of first electrode portions, wherein each of the plurality of first electrode portions has a mesh shape which is formed of a plurality of first conductive lines and a plurality of second conductive lines intersecting with each other, wherein each of the plurality of first connection portions electrically connects the two first terminal portions which are electrically connected respectively to the two first electrode portions, and wherein a first width of the first terminal portion in the first direction is wider than a second width of the first conductive line in the first direction and a third width of the second conductive line in the first direction.

Description

CROSS-REFERENCE TO RELATED APPLICATION The present application is a continuation of U.S. patent application Ser. No. 18/886,394, filed on Sep. 16, 2024, which is a continuation of U.S. patent application Ser. No. 18/220,457, filed on Jul. 11, 2023, and issued as U.S. Pat. No. 12,124,663 on Oct. 22, 2024, which is a continuation of U.S. patent application Ser. No. 17/852,575, filed on Jun. 29, 2022, and issued as U.S. Pat. No. 11,803,282 on Oct. 31, 2023, which is a continuation of U.S. patent application Ser. No. 17/009,387, filed on Sep. 1, 2020, and issued as U.S. Pat. No. 11,409,398 on Aug. 9, 2022, which is a continuation of U.S. application Ser. No. 16/571,754, filed on Sep. 16, 2019, and issued as U.S. Pat. No. 10,788,942 on Sep. 29, 2020, which application is a continuation of U.S. patent application Ser. No. 16/020,331, filed on Jun. 27, 2018, and issued as U.S. Pat. No. 10,416,827 on Sep. 17, 2019, which application is a continuation of U.S. patent application Ser. No. 15/187,065, filed on Jun. 20, 2016, and issued as U.S. Pat. No. 10,031,630 on Jul. 24, 2018, which application claims priority from Japanese Patent Application No. 2015-145778 filed on Jul. 23, 2015, the content of which is hereby incorporated by reference into this application. BACKGROUND The invention relates to a display, an input device, and a method of manufacturing the display. Recently, there is a technique in which an input device called a touch panel or a touch sensor is mounted to a display plane side of a display, and an input position is detected and output when an input tool such as a finger or a touch pen is in contact with the touch panel to perform an input operation. In addition, an electrostatic capacitance system is one of detection systems to detect a contact position at which the finger or the like is in contact with the touch panel. In a touch panel using the electrostatic capacitance system, a pair of electrodes oppositely arranged with a dielectric layer interposed therebetween, that is, a plurality of capacitive elements formed of a drive electrode and a detection electrode are provided inside a plane of the touch panel. Further, the input position is detected using a fact that electrostatic capacitance of the capacitive element changes when the input tool such as the finger and the touch pen is in contact with the capacitive element to perform the input operation. There is a touch panel in which a plurality of drive electrodes and a plurality of detection electrodes are formed on the same plane in order to reduce a thickness, for example, of the display provided with such a touch panel. Each of the plurality of drive electrodes includes a plurality of first electrode portions, which are arranged with an interval in a first direction, and each of the plurality of detection electrodes includes a plurality of second electrode portions which are arranged with an interval in a second direction. For example, Japanese Patent Application Laid-Open Publication No. 2013-218647 (Patent Document 1) describes a technique regarding a conductor pattern structure of an electrostatic capacitive touch panel which is provided with first-axis conductor assemblies having a plurality of first-axis conductive cells arranged on a surface of a rigid substrate, and second-axis conductor assemblies having a plurality of second-axis conductive cells arranged on the surface of the rigid substrate. For example, Japanese Patent Application Laid-Open Publication No. 2013-206198 (Patent Document 2) describes a technique regarding a touch sensor in which a first electrode pattern has a plurality of first island-shaped electrode portions formed with an interval in a first direction on a substrate, and a second electrode pattern has a plurality of second island-shaped electrode portions formed with an interval in a second direction on the substrate. For example, Japanese Patent Application Laid-Open Publication No. 2014-85771 (Patent Document 3) describes a technique regarding an electrostatic capacitive touch panel sensor substrate in which first electrodes and second electrodes are arranged in a lattice shape on a transparent substrate, the first electrodes are coupled via a first connection portion to form a first electrode column, and the second electrodes are coupled via a second connection portion to form a second electrode column. SUMMARY It is difficult to easily reduce each resistance of the drive electrode and the detection electrode in a case where each of the plurality of first electrode portions included in the drive electrode and each of the plurality of second electrode portions included in the detection electrode are composed of a transparent conductive film made of, for example, indium tin oxide (ITO) or the like. Thus, it is difficult to easily improve detection speed or detection sensitivity in touch detection. Alternatively, when a width dimension of the drive electrode or the detection electrode is widened in order to redu