KR102027775B1 - Touch sensor - Google Patents

Touch sensor Download PDF

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Publication number
KR102027775B1
KR102027775B1 KR1020150044206A KR20150044206A KR102027775B1 KR 102027775 B1 KR102027775 B1 KR 102027775B1 KR 1020150044206 A KR1020150044206 A KR 1020150044206A KR 20150044206 A KR20150044206 A KR 20150044206A KR 102027775 B1 KR102027775 B1 KR 102027775B1
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KR
South Korea
Prior art keywords
bridge electrode
touch sensor
mesh pattern
mesh
pattern
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Application number
KR1020150044206A
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Korean (ko)
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KR20160116462A (en
Inventor
최병진
박대출
이재현
Original Assignee
동우 화인켐 주식회사
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Application filed by 동우 화인켐 주식회사 filed Critical 동우 화인켐 주식회사
Priority to KR1020150044206A priority Critical patent/KR102027775B1/en
Publication of KR20160116462A publication Critical patent/KR20160116462A/en
Priority to KR1020190118156A priority patent/KR102322284B1/en
Application granted granted Critical
Publication of KR102027775B1 publication Critical patent/KR102027775B1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)

Abstract

The present invention relates to a touch sensor, and more particularly, a sensing pattern including a first mesh pattern formed in a first direction and a second mesh pattern formed in a second direction; A bridge electrode connecting spaced unit patterns of the second mesh pattern and having a body part and a tip part contacting the second mesh pattern; And an insulating layer interposed between the sensing pattern and the bridge electrode, thereby narrowing the area of the bridge electrode and facilitating contact with the second mesh pattern, thereby reducing the visibility of the bridge electrode and providing excellent touch sensitivity. It relates to a touch sensor that can be implemented at the same time.

Description

Touch sensor {TOUCH SENSOR}

The present invention relates to a touch sensor.

As computers using digital technology are developed, auxiliary devices of computers are being developed together. Personal computers, portable transmission devices, and other personal information processing devices use various input devices such as a keyboard and a mouse. To perform text and graphics processing.

However, with the rapid progress of the information society, the use of computers is gradually increasing, and there is a problem in that it is difficult to operate an efficient product only with a keyboard and a mouse, which play a role as an input device. Therefore, there is a growing need for a device that is not only simple and has less misoperation, but also anyone can easily input information.

In addition, the technology related to the input device is shifting to high reliability, durability, innovation, design and processing related technology beyond the level that meets the general function, and in order to achieve this purpose, information input such as text, graphics, etc. Touch panel has been developed as a possible input device.

The touch sensor is a display surface of an electronic organizer, a liquid crystal display device (LCD), a plasma display panel (PDP), an electroluminescence (El), and an image display device such as a cathode ray tube (CRT). Is a tool used to allow a user to select desired information while viewing the image display apparatus.

On the other hand, the types of touch sensors are resistive type, capacitive type, electro-magnetic type, SAW type, surface acoustic wave type, and infrared type. Type). These various types of touch sensors are adopted in electronic products in consideration of signal amplification problems, resolution differences, difficulty in design and processing technology, optical properties, electrical properties, mechanical properties, environmental properties, input properties, durability, and economics. Currently, the most widely used methods include resistive touch sensors and capacitive touch sensors.

In order to reduce thickness and improve optical characteristics of such a touch sensor, a one layer touch sensor using a bridge electrode has been in the spotlight. However, when forming a bridge electrode connecting the X and Y electrodes, there is a problem in that the bridge electrode is recognized when the area of the bridge electrode is widened in order to increase the contact area between the bridge electrode and the X electrode or the Y electrode to sense the touch sensitivity. .

Korean Patent Laid-Open No. 2012-44268 discloses a method of manufacturing a capacitive touch panel, but has not suggested an alternative to the problem.

Korean Laid-Open Patent No. 2012-44268

An object of the present invention is to provide a touch sensor which can reduce the visibility while having excellent touch sensitivity.

1. a sensing pattern comprising a first mesh pattern formed in a first direction and a second mesh pattern formed in a second direction;

A bridge electrode connecting spaced unit patterns of the second mesh pattern and having a body part and a tip part contacting the second mesh pattern; And

And an insulating layer interposed between the sensing pattern and the bridge electrode.

2. In the above 1, the sensing pattern is molybdenum, silver, aluminum, copper, palladium, gold, platinum, zinc, tin, titanium, chromium, nickel, tungsten or two or more of these alloys; Or indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium zinc oxide (IZTO), cadmium tin oxide (CTO), copper oxide (CO), PEDOT (poly (3,4-, ethylenedioxythiophene)), carbon nanotubes (CNT) or graphene (graphene), a touch sensor.

3. In the above 1, the bridge electrode is molybdenum, silver, aluminum, copper, palladium, gold, platinum, zinc, tin, titanium, chromium, nickel, tungsten or two or more of these alloys; Or indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium zinc oxide (IZTO), cadmium tin oxide (CTO), copper oxide (CO), PEDOT (poly (3,4-, ethylenedioxythiophene)), carbon nanotubes (CNT) or graphene (graphene), a touch sensor.

4. In the above 1, wherein the bridge electrode has two or more tips formed in different directions, each tip is in contact with the second mesh pattern, the touch sensor.

5. In the above 1, wherein the bridge electrode has two or more tips formed in the first direction and the second direction, each tip is in contact with the second mesh pattern, the touch sensor.

6. In the above 1, wherein the bridge electrode is insulated from the first mesh pattern, the touch sensor.

7. In the above 1, the tip portion is 1 to 100㎛ the width, the touch sensor.

8. In the above 1, wherein the bridge electrode is a long side length of the body portion 30 to 1000㎛, touch sensor.

9. In the above 1, wherein the bridge electrode has a body structure mesh structure, the touch sensor.

10. In the above 1, wherein the bridge electrode has a body portion of two or more bridges, the touch sensor.

11. In the above 1, wherein the insulating layer is located in the form of a layer, the tip portion is connected to the second mesh pattern through a contact hole formed in the insulating layer, the touch sensor.

12. In the above 1, wherein the insulating layer is located in the form of an island only at the intersection of the sensing pattern and the bridge electrode, the tip portion is connected to the second mesh pattern through a contact hole formed in the insulating layer, the touch sensor.

13. The image display device comprising the touch sensor of any one of 1 to 12 above.

The touch sensor of the present invention has a tip portion at which the bridge electrode contacts the second mesh pattern, thereby making it possible to make contact with the second mesh pattern while narrowing the area of the bridge electrode. Accordingly, while the bridge electrode is less visible, excellent touch sensitivity can be realized at the same time.

In addition, the touch sensor of the present invention can reduce the area of the bridge electrode, thereby improving the bendability.

1 is a schematic perspective view of a touch sensor according to an embodiment of the present invention.
2 is an enlarged perspective view illustrating a bridge electrode in the touch sensor according to the exemplary embodiment of the present invention.
3 is a schematic perspective view of a touch sensor according to an embodiment of the present invention.
4 is a schematic perspective view of a touch sensor according to an embodiment of the present invention.
5 is an enlarged cross-sectional view of a bridge electrode in the touch sensor according to the exemplary embodiment of the present invention.
6 is a schematic perspective view of a touch sensor according to an embodiment of the present invention.

The present invention provides a sensing pattern including a first mesh pattern formed in a first direction and a second mesh pattern formed in a second direction; A bridge electrode connecting spaced unit patterns of the second mesh pattern and having a body part and a tip part contacting the second mesh pattern; And an insulating layer interposed between the sensing pattern and the bridge electrode, thereby narrowing the area of the bridge electrode and facilitating contact with the second mesh pattern, thereby reducing the visibility of the bridge electrode and providing excellent touch sensitivity. It relates to a touch sensor that can be implemented at the same time.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The sensing pattern may include a first mesh pattern 10 formed in a first direction and a second mesh pattern 20 formed in a second direction.

The first mesh pattern 10 and the second mesh pattern 20 are disposed in different directions. For example, the first direction may be an X-axis direction, and the second direction may be a Y-axis direction vertically intersecting with the second direction, but is not limited thereto.

The first mesh pattern 10 and the second mesh pattern 20 provide information about the X coordinate and the Y coordinate of the touched point. Specifically, when a human hand or an object contacts the cover window substrate, the change of capacitance according to the contact position toward the driving circuit via the first mesh pattern 10, the second mesh pattern 20, and the position detection line. Is passed. Then, the contact position is grasped by the change of the capacitance converted into an electrical signal by the X and Y input processing circuit (not shown) or the like.

In this regard, the first mesh pattern 10 and the second mesh pattern 20 are formed on the same layer, and each pattern must be electrically connected to detect a touched point. However, since the first mesh pattern 10 is connected to each other but the second mesh pattern 20 has a structure in which the unit patterns are separated from each other in an island form, the second mesh pattern 20 is electrically connected to the second mesh pattern 20. In order to do this, a separate bridge electrode 30 is required. The bridge electrode 30 will be described later.

In the present invention, the specific form of the mesh structure is not particularly limited. For example, a rectangular rectangular mesh structure, a rhombus mesh structure, a hexagonal mesh structure, etc. may be mentioned, but it is not limited to this. In each structure, the length of the long side may be, for example, 2 to 500 µm, and may be appropriately adjusted according to electrical conductivity, transmittance, and the like within the above range.

The width of the mesh pattern is not particularly limited, and may be, for example, 1 to 30 μm, preferably 1 to 20 μm, but is not limited thereto. When the width of the metal mesh pattern is 1 to 30 mu m, the visibility of the pattern may be reduced and appropriate electrical resistance may be obtained.

The thickness of the sensing pattern is not particularly limited, and may be, for example, 10 to 350 nm. When the thickness of the sensing pattern is less than 10 nm, the electrical resistance may increase, and thus the touch sensitivity may be lowered. When the thickness of the sensing pattern is greater than 350 nm, the reflectance may increase, thereby causing a problem of visibility.

The sensing pattern may be applied to metals having high electrical conductivity and low resistance without limitation, for example, molybdenum, silver, aluminum, copper, palladium, gold, platinum, zinc, tin, titanium or two or more of these alloys. Can be.

In addition to this, a transparent electrode material known in the art may be further used. For example, indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium zinc oxide (IZTO), cadmium tin oxide (CTO), copper oxide (CO), PEDOT (poly (3, 4-ethylenedioxythiophene)), carbon nanotubes (CNT), graphene (graphene) and the like.

The method of forming the sensing pattern is not particularly limited, and for example, may be formed by various thin film deposition techniques such as physical vapor deposition (PVD) and chemical vapor deposition (Chemical VaporDeposition, CVD). For example, it may be formed by reactive sputtering, which is an example of physical vapor deposition.

In addition, the sensing pattern may be formed by a printing process. In this printing process, various printing methods such as gravure off set, reverse off set, inkjet printing, screen printing, and gravure printing may be used. In addition to the above method, it may be formed by photolithography.

The bridge electrode 30 connects spaced unit patterns of the second mesh pattern 20. In this case, since the bridge electrode 30 should be insulated from the first mesh pattern 10 among the sensing patterns, the insulating layer 40 is formed for this purpose. This will be described later.

The bridge electrode 30 has a body portion 31 and a tip portion 32.

In general, the touch sensitivity is improved when the contact area between the bridge electrode 30 and the sensing pattern connected thereto is wide in the touch sensor. However, for this purpose, when the area of the bridge electrode 30 is enlarged, there is a problem that the bridge electrode 30 is visually recognized by the user, and the flexibility of the touch sensor is deteriorated.

However, in the bridge electrode 30 according to the present invention, the tip portion 32 may contact the second mesh pattern to connect the spaced unit patterns of the second mesh pattern.

That is, since the tip portion 32 is in contact with the second mesh pattern, the body portion 31 having a large area is not required for contact with the second mesh pattern. As a result, the area of the body portion 31 is narrowed, so that the bridge electrode 30 can be visually reduced.

The bridge electrode 30 may have two or more tips 32. Each tip 32 may be formed in a different direction. The different directions may be, for example, a first direction and a second direction, but is not limited thereto. In the case of having a plurality of tips 32, each tip 32 may be in contact with the second mesh pattern.

The width of the tip portion 32 is not particularly limited, and may be, for example, 1 to 100 μm. When the width of the tip portion 32 is within the above range, the area of the bridge electrode 30 may be reduced while adjusting the contact resistance to an appropriate level. Within the above range can be appropriately adjusted according to the width, the long side length of the mesh pattern.

In addition, the body portion 31 of the bridge electrode 30 may also be connected to the second mesh pattern. In such a case, the contact area with the second mesh pattern may be wider to further improve touch sensitivity.

The body part 31 of the bridge electrode 30 may have a bar structure, for example.

The body portion 31 of the bridge electrode 30 may have a single bridge, for example as illustrated in FIGS. 1 and 2, or may have two or more bridges as illustrated in FIG. 3. When the body part 31 has two or more bridges, it is advantageous in terms of resistance and reliability.

In addition, as illustrated in FIG. 6, the body part 31 may have a mesh structure. In such a case, the area of the bridge electrode 30 can be further reduced to improve the flexibility of the touch sensor.

The bridge electrode 30 may have a long side length of 30 to 1000 μm. When the long side length of the body portion 31 is within the above range, the area of the bridge electrode 30 may be reduced and at the same time low resistance may be realized. It can be appropriately adjusted according to the long side length of the mesh pattern within the above range.

The bridge electrode 30 may be applied without limitation to the transparent electrode material known in the art. For example, indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium zinc tin oxide (IZTO), cadmium tin oxide (CTO), PEDOT (poly (3,4-ethylenedioxythiophene)) , Carbon nanotubes (CNT), graphene (graphene) and the like, these may be used alone or in combination of two or more. Preferably indium tin oxide (ITO) may be used.

In addition, metals with good electrical conductivity and low resistance can be applied without limitation, for example, molybdenum, silver, aluminum, copper, palladium, gold, platinum, zinc, tin, titanium, chromium, nickel, tungsten or two of them. And alloys of species or more.

In the touch sensor of the present invention, the stacking order of the sensing pattern and the bridge electrode 30 is not particularly limited, and as illustrated in FIGS. 1 to 3, the bridge electrode 30 may be positioned above the sensing pattern. As illustrated in FIG. 4, the bridge electrode 30 may be positioned under the sensing pattern.

The formation method of the bridge electrode 30 is not specifically limited, For example, the method illustrated as the formation method of the above-mentioned sensing pattern can be used.

The insulating layer 40 is interposed between the sensing pattern and the bridge electrode 30 to insulate the first mesh pattern 10 and the second mesh pattern 20.

As illustrated in FIGS. 1 to 4, the insulating layer 40 may be located in an island form only at the intersection of the sensing pattern and the bridge electrode 30, or may be entirely located in a layer form as illustrated in FIG. 5. .

When the insulating layer 40 is positioned in an island form, the second mesh pattern 20 is directly connected to the bridge electrode 30, and when the insulating layer 40 is positioned in a layer form, the second mesh pattern 20 may be It is connected to the bridge through a contact hole 50 formed in the insulating layer 40.

The number and positions of the contact holes 50 are not particularly limited, and a plurality of contact holes 50 are preferably present throughout the entire touch area. However, the contact hole 50 may be visually recognized by the user. The hole 50 is preferably formed to be concentrated at a position where the electric field is concentrated (for example, around the intersection point of the first mesh pattern 10 and the bridge electrode 30) and is dispersed and formed in the entire touch area.

The insulating layer 40 can be formed using any material and method used in the art without particular limitation.

The touch sensor of the present invention may be formed on the substrate 100.

The substrate 100 may be a material commonly used in the art without limitation, for example, glass, polyethersulphone (PES), polyacrylate (PAR, polyacrylate), polyether imide (PEI, polyetherimide, polyethylene naphthalate (PEN, polyethyelenen napthalate), polyethylene terephthalate (PET, polyethyelene terepthalate), polyphenylene sulfide (PPS), polyallylate, polyimide, polycarbonate ( PC, polycarbonate), cellulose tri acetate (TAC), cellulose acetate propionate (CAP), and the like.

Or more, to present a preferred embodiment to aid the understanding of the present invention, these examples are not intended to limit the appended claims to illustrate the present invention, but within the scope and spirit of the present invention It is apparent to those skilled in the art that various changes and modifications can be made to the present invention, and such modifications and changes belong to the appended claims.

10: first mesh pattern 20: second mesh pattern
30: bridge electrode 31: body portion
32: tip 40: insulating layer
50: contact hole 100: substrate

Claims (13)

A sensing pattern including a plurality of first mesh patterns arranged in a first direction and a plurality of second mesh patterns arranged in a second direction;
A bridge electrode connecting the unit patterns spaced apart from the second mesh pattern and having a bar-shaped body portion extending in the second direction and a tip portion contacting the second mesh pattern and having a smaller width than the body portion; ; And
And an insulating layer interposed between the sensing pattern and the body portion of the bridge electrode.
The method of claim 1, wherein the sensing pattern includes molybdenum, silver, aluminum, copper, palladium, gold, platinum, zinc, tin, titanium, chromium, nickel, tungsten, or an alloy of two or more thereof; Or indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium zinc oxide (IZTO), cadmium tin oxide (CTO), copper oxide (CO), PEDOT (poly (3,4-, ethylenedioxythiophene)), carbon nanotubes (CNT) or graphene (graphene), a touch sensor.
The method according to claim 1, wherein the bridge electrode is molybdenum, silver, aluminum, copper, palladium, gold, platinum, zinc, tin, titanium, chromium, nickel, tungsten or two or more of these alloys; Or indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium zinc oxide (IZTO), cadmium tin oxide (CTO), copper oxide (CO), PEDOT (poly (3,4-, ethylenedioxythiophene)), carbon nanotubes (CNT) or graphene (graphene), a touch sensor.
The touch sensor of claim 1, wherein the bridge electrode has two or more tips formed in different directions, and each tip contacts the second mesh pattern.
The touch sensor of claim 1, wherein the bridge electrode has two or more tips formed in a first direction and a second direction, and each tip contacts a second mesh pattern.
The touch sensor according to claim 1, wherein the tip portion has a width of 1 to 100 µm.
The touch sensor of claim 1, wherein the bridge electrode has a long side length of 30 to 1000 μm.
delete The touch sensor of claim 1, wherein the bridge electrode has two or more bridges.
The touch sensor of claim 1, wherein the insulating layer is positioned in a layer form, and the tip portion is connected to the second mesh pattern through a contact hole formed in the insulating layer.
The touch sensor of claim 1, wherein the insulating layer is disposed in an island form only at an intersection of the sensing pattern and the bridge electrode, and the tip portion is connected to the second mesh pattern through a contact hole formed in the insulating layer.
A sensing pattern including a plurality of first mesh patterns arranged in a first direction and a plurality of second mesh patterns arranged in a second direction;
Connecting the unit patterns spaced apart from the second mesh pattern and contacting the bar-shaped body portion and the second mesh pattern extending in the second direction, respectively, the first and second widths being smaller than the body portion; A bridge electrode having two or more tips formed in a direction; And
And an insulating layer interposed between the sensing pattern and the bridge electrode.
An image display device comprising the touch sensor of any one of claims 1 to 7, and 9 to 12.
KR1020150044206A 2015-03-30 2015-03-30 Touch sensor KR102027775B1 (en)

Priority Applications (2)

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KR1020150044206A KR102027775B1 (en) 2015-03-30 2015-03-30 Touch sensor
KR1020190118156A KR102322284B1 (en) 2015-03-30 2019-09-25 Touch sensor

Applications Claiming Priority (1)

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KR1020150044206A KR102027775B1 (en) 2015-03-30 2015-03-30 Touch sensor

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Publication number Priority date Publication date Assignee Title
WO2019142748A1 (en) * 2018-01-16 2019-07-25 積水ポリマテック株式会社 Capacitance sensor
KR20200122563A (en) * 2019-04-18 2020-10-28 주식회사 아모센스 Sensor module for measuring skin condition and device thereof
CN112462962B (en) * 2019-09-06 2023-01-06 华为技术有限公司 Touch sensor, touch display screen and electronic equipment

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KR101073333B1 (en) * 2009-08-27 2011-10-12 삼성모바일디스플레이주식회사 Touch Screen Panel and fabrication method thereof
KR20120044268A (en) 2010-10-27 2012-05-07 (주)티메이 Method of preparing capacitance type touch panel and capacitance type touch panel prepared by the same
KR102009880B1 (en) * 2012-10-23 2019-08-12 엘지디스플레이 주식회사 Metal mesh type touch screen panel

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