CN110515479B - Method for reducing local area impedance value of transparent conductive film and product thereof - Google Patents

Method for reducing local area impedance value of transparent conductive film and product thereof Download PDF

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CN110515479B
CN110515479B CN201810494172.7A CN201810494172A CN110515479B CN 110515479 B CN110515479 B CN 110515479B CN 201810494172 A CN201810494172 A CN 201810494172A CN 110515479 B CN110515479 B CN 110515479B
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sensing
induction
strings
wire
transparent
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CN110515479A (en
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白志强
林孟癸
林青峰
陈秋雯
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Young Fast Optoelectronics Co Ltd
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Young Fast Optoelectronics Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • 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
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/0026—Apparatus for manufacturing conducting or semi-conducting layers, e.g. deposition of metal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
    • H01B5/14—Non-insulated conductors or conductive bodies characterised by their form comprising conductive layers or films on insulating-supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/202—Conductive

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Abstract

The invention discloses a method for reducing local area impedance value of a transparent conductive film, which comprises the following steps: providing a transparent conductive layer; defining at least one local area on the transparent conductive layer; and electrically lapping at least one high-electrical-conductivity unit on the local area so as to improve the conductivity of the local area and reduce the impedance value; the transparent conductive layer is made of a material selected from metal oxide films; the high-electrical-conductivity unit is a metal thin wire; the wire diameter of the metal thin wire is below 5 mu m.

Description

Method for reducing local area impedance value of transparent conductive film and product thereof
Technical Field
The present invention relates to transparent conductive film, and is especially one method of reducing local area impedance of transparent conductive film and its product.
Background
Conductive films made of metal oxide, such as Indium Tin Oxide (ITO), are commonly used as transparent conductive films for various photoelectric devices such as transparent touch panels, because of their light transmittance and electrical conductivity; however, according to the research on the relation that the light transmittance and the electric conductivity of the ITO transparent conductive film are about inversely proportional, namely the higher the light transmittance is, the worse the electric conductivity is; for example, when the surface resistivity of the film is below 10Ω/sq, the visible light transmittance can reach 80%, but if the transmittance is above 90%, the surface resistance will be increased to above 100deg.Ω/sq, so that the application of the conventional ITO transparent conductive film in the aspect of touch screen is limited by the dual factors of the transmittance and the conductivity.
The transparent touch pad which is commonly arranged in front of the display screen and used as an input device is mostly made of an ITO conductive film, and a touch sensing structure is formed by scribing a plurality of sensing electrodes and signal guide paths thereof on the transparent ITO film, however, in recent years, along with the trend of functional precision of electronic products, the size specifications of the touch sensing electrodes and the signal guide paths on the touch sensor are also becoming smaller and smaller, and the thinned ITO sensing electrodes and the thinned signal guide paths will generate high impedance value phenomenon, so that the attenuation of transmission signals is caused, the transmission of signals is not facilitated, and the bottleneck which is difficult to overcome is faced in the design and the process development of the large-size touch pad.
Disclosure of Invention
The invention mainly aims to provide a method for reducing the impedance value of a local area of a transparent conductive film, which can reduce the impedance value of the local area of the transparent conductive film, improve conductivity and gain the application of the transparent conductive film in the field of touch sensors on the basis of not reducing the attractiveness.
To achieve the above object, the method for reducing the impedance value of a local area of a transparent conductive film according to the present invention comprises: providing a transparent conductive layer; defining at least one local area on the transparent conductive layer; and electrically lapping a high-electrical-conductivity unit on the local area, thereby improving the conductivity of the local area and achieving the purpose of reducing the impedance value of the local area.
In particular, the material of the transparent conductive layer is selected from a metal oxide film, a graphene film, and the like, but is not limited thereto; the material of the metal oxide thin film is selected from indium tin oxide, indium zinc oxide, zinc aluminum oxide, tin antimony oxide, polyethylene dioxythiophene, and the like, but is not limited thereto.
In particular, the local area is a touch sensing electrode or a touch signal conducting line, but is not limited thereto.
Particularly, the high electrical conductivity unit is a Metal fine wire or a Metal Mesh (Mesh), but is not limited thereto; preferably, the wire diameter of the metal thin wire is 25 μm or less, more preferably, the wire diameter of the metal thin wire is 5 μm or less; the material of the metal fine wire is selected from gold, silver, copper, aluminum, molybdenum, nickel, alloys of the foregoing materials, and the like, but is not limited thereto.
In particular, the metal thin wire includes one or more continuous lines, wavy curves, regular lines or irregular lines, or is composed of a plurality of line segments arranged at intervals, but is not limited thereto.
Another object of the present invention is to provide a transparent conductive film with a low impedance value in a local area, which can reduce the thickness of the transparent conductive film, increase the transparency and save the material cost, and improve the conductivity and the signal conduction efficiency of the local area, so as to facilitate the design and the manufacture of a touch panel with a larger size area, and the application of the transparent conductive film in the field of touch sensors.
To achieve the above object, the transparent conductive film with low impedance value in local area of the present invention comprises a transparent conductive layer having at least one defined local area; and electrically lapping at least one high-electrical-conductivity unit on the local area, thereby reducing the impedance value of the local area.
In particular, the material of the transparent conductive layer is selected from a metal oxide film, a graphene film, and the like, but is not limited thereto; the material of the metal oxide thin film is selected from indium tin oxide, indium zinc oxide, zinc aluminum oxide, tin antimony oxide, polyethylene dioxythiophene, and the like, but is not limited thereto.
In particular, the local area is a touch sensing electrode or a touch signal conducting line, but is not limited thereto.
Particularly, the high electrical conductivity unit is a Metal fine wire or a Metal Mesh (Mesh), but is not limited thereto; preferably, the wire diameter of the metal thin wire is 25 μm or less, more preferably, the wire diameter of the metal thin wire is 5 μm or less; the material of the metal fine wire is selected from gold, silver, copper, aluminum, molybdenum, nickel, alloys of the foregoing materials, and the like, but is not limited thereto.
In particular, the metal thin wire includes one or more continuous lines, wavy curves, regular lines or irregular lines, or is composed of a plurality of line segments arranged at intervals, but is not limited thereto.
In one embodiment, the transparent conductive film with local low impedance value of the present invention is applied to make a transparent capacitive touch sensor structure capable of reducing the resistance value of the touch sensing serial surface, and mainly electrically connecting a high-electrical conductivity unit on the touch sensing serial; the transparent capacitive touch sensor structure comprises: the transparent first induction layer is made of a metal oxide film or a graphene film, a plurality of first induction strings are arranged on the first induction layer, the first induction strings are formed by arranging a plurality of first induction units in rows along a first direction, a first lap joint point is arranged at one end of each first induction string, a first high-electrical conduction wire is arranged on the first induction strings along the first direction and is electrically lapped on the first lap joint point and the plurality of first induction units, the first high-electrical conduction wire is a nano-scale thin wire, and the material of the first high-electrical conduction wire is selected from gold, silver, copper, aluminum, molybdenum, nickel or alloys of the materials; a transparent second sensing layer, the material of which is selected from a metal oxide film or a graphene film, the second sensing serial is formed by arranging a plurality of second sensing units in a serial manner along a second direction, a second lapping point is arranged at one end of each second sensing serial, a second high-electrical-property conducting wire is arranged on the second sensing serial along the second direction and is electrically lapped with the second lapping point and the plurality of second sensing units, the first high-electrical-property conducting wire is a nano-scale thin wire, and the material of which is selected from gold, silver, copper, aluminum, molybdenum, nickel or alloy of the materials; the transparent insulating layer is arranged between the first sensing layer and the second sensing layer, so that the two sensing layers are insulated and separated from each other; and the plurality of first sensing serial and the plurality of second sensing serial are arranged in an staggered manner, so that the plurality of first sensing units and the plurality of second sensing units are arranged in a complementary corresponding manner to form a continuous lattice-shaped sensing unit matrix.
In one embodiment, the transparent conductive film with local low impedance value of the present invention is applied to manufacture a composite transparent touch sensor structure with dual functions of capacitive touch sensor and electromagnetic touch sensor, and the impedance value is reduced by arranging high electrical conduction units on the touch sensing serial or the antenna serial, so as to achieve the effect of both high light transmittance and high signal conductivity; the composite transparent touch sensor structure comprises: a transparent first induction layer, the material of which is selected from a metal oxide film or a graphene film, and is provided with a plurality of first capacitance induction strings and a plurality of first electromagnetic antenna strings, wherein the first capacitance induction strings are formed by arranging a plurality of first capacitance induction units in rows along a first direction, one end of each first capacitance induction string is provided with a first capacitance signal connection point, the first electromagnetic antenna strings are arranged along the first direction, one end of each first electromagnetic antenna string is provided with a first electromagnetic signal connection point, the other end of each first electromagnetic antenna string is connected with a first serial line, the first serial line is connected with a plurality of first electromagnetic antenna strings in series, and first high-electrical conductive wires which are respectively and electrically connected with each other along the first direction are formed by nanoscale micro-conductive wires, and the material of the first high-electrical conductive wires is selected from gold, silver, copper, aluminum, molybdenum, nickel or alloys of the materials; a transparent second induction layer, the material of which is selected from a metal oxide film or a graphene film, and which is provided with a plurality of second capacitance induction strings and a plurality of second electromagnetic antenna strings, wherein the second capacitance induction strings are formed by arranging a plurality of second capacitance induction units in rows along a second direction, one end of the second capacitance induction strings is provided with a second capacitance signal connection point, the second electromagnetic antenna strings are arranged along the second direction, one end of the second electromagnetic antenna strings is provided with a second electromagnetic signal connection point, the other end of the second electromagnetic antenna strings is connected with a second serial line, the second serial line is connected with a plurality of second electromagnetic antenna strings in series, and a second high-electrical conductive wire which is arranged along the second direction is respectively and electrically connected above the second capacitance induction strings and the second electromagnetic antenna strings, the second high-electrical conductive wire is formed by a nanoscale micro-conductive wire, and the material of which is selected from gold, silver, copper, aluminum, molybdenum, nickel or alloys of the materials; a transparent insulating layer arranged between the first sensing layer and the second sensing layer, thereby insulating and separating the two sensing layers from each other; the first direction and the second direction are orthogonal to each other, the plurality of first capacitance sensing serial and the plurality of second capacitance sensing serial are arranged in an staggered manner, so that the plurality of first capacitance sensing units and the plurality of second capacitance sensing units are correspondingly arranged in a complementary pattern, a continuous grid-shaped capacitance sensing unit matrix is formed together, and the plurality of first electromagnetic antenna serial and the plurality of second electromagnetic antenna serial are arranged in an orthogonal manner to each other, and a continuous grid-shaped electromagnetic antenna matrix is formed together; in particular, the first capacitive sensing serial and the first electromagnetic antenna serial are arranged in parallel and spaced apart from each other, and the second capacitive sensing serial and the second electromagnetic antenna serial are arranged in parallel and spaced apart from each other.
In an embodiment, the transparent conductive film with local low impedance value of the present invention is applied to make a transparent interactive capacitive touch sensor structure, which is mainly to electrically lap-joint a high-electrical conduction unit on a touch signal conductor in a prospective region, thereby reducing the impedance value of a touch signal transmission path and improving the touch signal transmission efficiency; the transparent interactive capacitive touch sensor structure comprises: the transparent touch sensor is arranged on a transparent substrate layer, the central area of the substrate layer is a prospective area, the periphery edge area of the substrate layer is provided with a non-light-transmitting frame to form a shielding area, the touch sensor is made of a metal oxide film and is provided with a plurality of sensing arrays which are arranged in the prospective area, each sensing array comprises a first capacitance sensing unit and a plurality of second capacitance sensing units, the first capacitance sensing unit and each second capacitance sensing unit are respectively and electrically connected to an electric contact point arranged in the shielding area through a signal guide path, at least one high-electrical conducting wire is electrically connected to the signal guide path in a lap joint mode, the high-electrical conducting wire is formed by nano-level micro-conducting wires, and the high-electrical conducting wire is made of gold, silver, copper, aluminum, molybdenum, nickel or alloy of the materials.
This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description.
Drawings
Fig. 1 is a simplified diagram of a laminated structure of a touch sensor according to a first embodiment.
Fig. 2 is a front view of the touch sensor of the first embodiment.
Fig. 3 is a rear view of the touch sensor of the first embodiment.
Fig. 4 is a plan view of the X-axis induction layer of the first embodiment.
Fig. 5 is a plan view of the Y-axis induction layer of the first embodiment.
Fig. 6 is a plan view of another Y-axis sensing layer of the first embodiment, depicting a curved fine metal wire bonded to the sensing series.
Fig. 7 is a plan view of another Y-axis sensing layer of the first embodiment, depicting the bonding of fine metal wires arranged in a plurality of spaced line segments on the sensing series.
Fig. 8 is a plan view of another Y-axis sensing layer of the first embodiment, illustrating that a plurality of fine metal wires arranged parallel to each other are lapped on the sensing series.
Fig. 9 is a simplified diagram of a laminated structure of a touch sensor according to a second embodiment.
Fig. 10 is a front view of a touch sensor according to a second embodiment.
Fig. 11 is a rear view of the touch sensor of the second embodiment.
Fig. 12 is a plan view of an X-axis induction layer of the second embodiment.
Fig. 13 is a plan view of the Y-axis induction layer of the second embodiment.
Fig. 14 is a plan view illustrating a layout of a touch sensing circuit according to a third embodiment.
Fig. 15 is an enlarged view of the sensing array structure of the third embodiment, illustrating that the fine metal wires are lapped on the signal conductors.
Symbol description
10 base layer
11 color frame
11a shielding region
11b prospective zone
20X axial induction layer
21X axial induction serial
21a sensing unit
21b overlap point
23 fine metal wire
24 signal conductor
25 signal output contact
30 transparent insulating layer
40Y axial induction layer
41Y axial induction serial
41a sensing unit
41b overlap point
43 fine metal wire
43a line segment
44 signal conductor
45 signal output contact
50 coating layer
60X axial induction layer
61X axis capacitance sensing serial
61a capacitance sensing unit
61b capacitance signal tap
63 fine metal wire
65 signal conductor
66X-axis electromagnetic antenna serial
67 electromagnetic signal overlap joint
68 series line
69 fine metal wire
70Y axial induction layer
71Y-axis capacitance induction serial
71a capacitance sensing unit
71b capacitor signal tap
73 fine metal wire
73a, 79a wave-like curve
73b, 79b line segment
75 signal conductor
76Y axis electromagnetic antenna serial
77 electromagnetic signal lap joint point
78 series line
79 fine metal wire
81-sense array
82 induction electrode
83 drive electrode
84 signal guide path
85 electrical contacts
89 fine metal wire
Detailed Description
The following describes a preferred embodiment of the application of the transparent conductive film with local low impedance value in the transparent touch sensor field; the embodiment shown in fig. 1 to 5 is a transparent capacitive touch sensor structure capable of reducing the surface resistance of a touch sensing serial, and mainly electrically connects a high-electrical-conductivity unit (i.e. a micro metal wire in the following description of the embodiment) to the touch sensing serial.
The transparent capacitive touch sensor structure comprises: a base layer 10, an X-axis sensing layer 20, an insulating layer 30, a Y-axis sensing layer 40, and a coating layer 50. Wherein, the substrate layer 10 is a high light transmittance glass sheet with excellent mechanical strength, a color frame 11 made of insulating Black Matrix (BM) is provided at the peripheral portion of the surface of the substrate layer 10, and a shielding region 11a forming a frame at the peripheral portion and a prospective region 11b at the central portion are defined on the substrate layer 10 by the color frame 11.
The X-axis sensing layer 20 is disposed in the prospective region 11b of the substrate, and comprises a plurality of X-axis sensing strings (Trace) 21, each of the X-axis sensing strings 21 is composed of a plurality of diamond-shaped planar sensing units 21a arranged in rows along the X-axis direction, a bonding point 21b is disposed at one end of each of the X-axis sensing strings 21, and each of the X-axis sensing strings 21 is provided with a fine metal wire 23 arranged along the X-axis direction and electrically bonded to the bonding point 21b and each of the sensing units 21a; the bonding point 21b may be connected to a signal output contact 25 by a signal wire 24, wherein the signal wire 24 is disposed along the edge of the substrate layer 10 within the shielding region 11a, and the front and rear ends of the signal wire 24 are electrically connected to the bonding point 21b and the signal output contact 25, respectively.
The Y-axis sensing layer 40 is disposed in the look-and-feel area 11b of the substrate, and comprises a plurality of Y-axis sensing strings 41, each Y-axis sensing string 41 is composed of a plurality of diamond-shaped planar sensing units 41a arranged in rows along the Y-axis direction, one end of each Y-axis sensing string 41 is provided with a bonding point 41b, and each Y-axis sensing string 41 is provided with a micro metal wire 43 arranged along the Y-axis direction and electrically bonded to the bonding point 41b and each sensing unit 41a; the bonding point 41b may be connected to a signal output contact 45 by a signal wire 44, wherein the signal wire 44 is disposed along the edge of the substrate layer 10 within the shielding region 11a, and the front and rear ends of the signal wire 44 are electrically connected to the bonding point 41b and the signal output contact 45, respectively.
The signal output contacts 25, 45 can be electrically connected to a signal bus (not shown) to transmit the touch signal to a signal processing circuit (not shown) for operation.
The X-axis sensing layer 20 and the Y-axis sensing layer 40 are made of transparent conductive films, and the materials thereof are metal oxide films, such as Indium Tin Oxide (ITO); in addition, the fine metal wires 23, 43 are made of high-electrical-conductivity and low-impedance materials, such as copper wires, and the metal materials of the fine metal wires 23, 43 have lower impedance values than the metal oxide films of the X, Y axial induction layers 20, 40, so that the electrical-bonding of the fine metal wires 23, 43 to the X, Y axial induction strings 21, 41 has the effect of improving the transmission of touch signals, the impedance values from the induction units 21a, 41a to the bonding points 21b, 41b can be effectively reduced, the attenuation rate of the touch signals in the transmission process is reduced, the wire diameters of the fine metal wires 23, 43 are set below 5 μm, and the nano-scale metal wires are not recognized by the eyes of human eyes even if the nano-scale metal wires are non-transparent materials, so that the nano-scale metal wires are suitable to be arranged in the prospective region 11 and the overall transparent touch sensor can not be reduced.
The X-axis sensing layer 20 and the Y-axis sensing layer 40 are insulated and separated from each other by the transparent insulating layer 30, and the sensing units 21a and 41a on the two sensing layers are arranged in a complementary and corresponding manner to form a rhombic grid-shaped sensing unit matrix; the transparent insulating layer 30 is made of one of solid optical adhesive film (OCA) or liquid optical resin (OCR), so that the two sensing layers 20 and 40 are insulated and separated, and the two sensing layers are bonded together.
The cover film layer 50 is combined on the outer surface of the transparent conductive film sensing layer 40 to provide protection for the wiring on the sensing layer; the coating layer 50 is an insulating film with high light transmittance, for example, polyethylene terephthalate (PET), cyclic Olefin Polymer (COP), polyethylene naphthalate (PEN), polyethylene (PE), polypropylene (PP), polyether ether ketone (PEEK), polysulfone (PSF), polyether Sulfone (PEs), polycarbonate (PC), polyamide, polyimide, acrylic resin, vinyl-series resin, and trivinyl cellulose (TAC), etc., but is not limited thereto.
As can be seen from the above description, in this embodiment, by the means of overlapping the fine metal wires 23, 43 on the X, Y axial induction strings 21, 41, the impedance value of the touch signal transmission path is reduced, so that the quality of touch signal transmission is improved, the design and manufacture of a touch panel with larger size and area are facilitated, the thickness of the conductive film used as the touch sensing layer is also reduced, and the material cost is saved, and the transmittance of the touch sensing layer is improved; the trace diameters of the fine metal wires 23 and 43 are nano-scale metal wires, which are objectively distinguished by the non-general vision, the distribution ratio of the fine metal wires is less than 0.3% of the whole area, the shielding light transmission ratio is extremely low, even very little, and the vast majority of the whole touch sensing layer is a light-permeable hollowed-out area, so that the fine metal wires are distributed on the sensing serial, the impedance value of the sensing serial can be greatly reduced, the signal transmission efficiency is improved, the prospective influence on the sensing serial is very little, and the fine metal wires have the advantage of being very few.
The fine metal wires 23, 43 in the previous embodiment are straight lines (see fig. 3) extending continuously, but since the transparent touch pad is usually disposed in front of the lcd, interference patterns (Moire) may be generated on the fine metal wires disposed in the straight lines, which affects the display quality of the screen; therefore, in practical application, the fine metal wires can also be arranged in a wave-shaped curve (as shown in fig. 6), a metal grid or other patterns of regular and irregular continuous extension lines, so that the problem of optical interference can be reduced. In addition, in fig. 7, the fine metal wire 43 is composed of a plurality of line segments 43a arranged at intervals, so that the impedance value of the sensing series connected by the fine metal wire can be flexibly adjusted according to the design requirement to adjust the requirement set by the signal processing circuit, and the line segment-shaped arrangement also has the effect of reducing the optical interference problem and improving the prospective advantage. In other possible embodiments, the plurality of fine metal wires 43 may be disposed parallel to each other (as shown in fig. 8), thereby ensuring high-efficiency signal transmission performance.
Furthermore, another embodiment shown in fig. 9 to 13 is a composite transparent touch sensor structure having both functions of capacitive touch sensor and electromagnetic touch sensor, wherein the impedance value is reduced by providing high-electrical-conductivity units (i.e. micro metal wires in the following embodiments) on the touch sensing serial or the antenna serial, so as to achieve the effect of both high light transmittance and high signal conductivity.
The composite transparent touch sensor structure comprises: a base layer 10, an X-axis sensing layer 60, an insulating layer 30, a Y-axis sensing layer 70, and a coating layer 50; wherein, the substrate layer 10 is a high light transmittance glass sheet with excellent mechanical strength, a color frame 11 made of an insulating black matrix material is provided at the peripheral portion of the surface of the substrate layer 10, and a shielding region 11a forming a frame shape at the peripheral portion and a viewing region 11b at the central portion are defined on the substrate layer 10 by the color frame 11.
The X-axis sensing layer 60 is disposed in the prospective region 11b of the substrate, and comprises a plurality of X-axis capacitive sensing strings 61 and X-axis electromagnetic antenna strings 66, wherein the X-axis capacitive sensing strings 61 and the X-axis electromagnetic antenna strings 66 are disposed in parallel and spaced apart from each other, and each X-axis capacitive sensing string 21 is formed by a plurality of rhombic-like planar capacitive sensing units 61a arranged in rows along the X-axis direction, one end of each X-axis capacitive sensing string 61 is provided with a capacitive signal bonding point 61b, and each X-axis capacitive sensing string 61 has a fine metal wire 63 disposed along the X-axis direction and electrically bonded to the capacitive signal bonding point 61b and each capacitive sensing unit 61a; the respective X-axis electromagnetic antenna series 66 are disposed along the X-axis direction, one end of each X-axis electromagnetic antenna series 66 is provided with an electromagnetic signal connection point 67, and the other end is connected to a serial line 68, the serial line 68 connects the X-axis electromagnetic antenna series 66 in series with each other, and a fine metal wire 69 disposed along the X-axis direction is disposed on each X-axis electromagnetic antenna series 66 and electrically connected to the electromagnetic signal connection point 67 and the serial line 68.
The Y-axis sensing layer 40 is disposed in the prospective region 11b of the substrate, and comprises a plurality of Y-axis capacitive sensing strings 71 and Y-axis electromagnetic antenna strings 76, wherein the Y-axis capacitive sensing strings 71 and the Y-axis electromagnetic antenna strings 76 are disposed in parallel and spaced apart from each other, and each Y-axis capacitive sensing string 71 is formed by a plurality of rhombic plane-like capacitive sensing units 71a arranged in a row along the Y-axis direction, one end of each Y-axis capacitive sensing string 71 is provided with a capacitive signal bonding point 71b, and each Y-axis capacitive sensing string 71 has a fine metal wire 73 disposed along the Y-axis direction and electrically bonded to the capacitive signal bonding point 71b and each capacitive sensing unit 71a; the respective Y-axis electromagnetic antenna series 76 are arranged along the Y-axis direction, one end of each Y-axis electromagnetic antenna series 76 is provided with an electromagnetic signal connection point 77, and the other end is connected to a serial line 78, the serial line 78 connects the Y-axis electromagnetic antenna series 76 in series with each other, and a micro metal wire 79 arranged along the Y-axis direction is provided on each Y-axis electromagnetic antenna series 76 and electrically connected to the electromagnetic signal connection point 77 and the serial line 78.
The capacitive signal connection points 61b and 71b and the electromagnetic signal connection points 67 and 77 on the axial sensing layers 60 and 70 of the aforementioned X, Y are disposed within the shielding region 11a, and they can be connected by signal wires 65 and 75 respectively to transmit the touch signal to a signal processing circuit (not shown) for operation.
The X-axis sensing layer 60 and the Y-axis sensing layer 70 are made of transparent conductive films, and the material thereof is a metal oxide film, such as Indium Tin Oxide (ITO); in addition, the fine metal wires 63, 69, 73, 79 are made of high-electrical-conductivity and low-impedance materials, such as copper wires, and the metal materials of the fine metal wires 63, 69, 73, 79 have lower impedance values than the metal oxide films of the X, Y axial induction layers 60, 70, so that the fine metal wires 63, 73 are electrically connected with the X, Y-axis capacitance induction strings 61, 71 and the fine metal wires 69, 79 are electrically connected with the X, Y-axis electromagnetic antenna strings 66, 76, which can improve the effect of touch signal transmission, thereby effectively reducing the impedance value from each capacitance induction string 61, 71 or the electromagnetic antenna strings 66, 76 to the connection points 61b, 71b, 67, 77, reducing the attenuation rate of the touch signal in the transmission process, and setting the wire diameter of the fine metal wires 63, 73 below 5 μm, so that the nano-level metal wires, even being non-transparent materials, are not visible to the eyes of human eyes, are suitable for being used in the prospective region 11, and the touch signal transmission can not detract from the transparency of the touch sensor.
The X-axis direction sensing layer 60 and the Y-axis direction sensing layer 70 are separated from each other by a transparent insulating layer 30. The X, Y axis capacitive sensing serials 61, 71 on the two sensing layers are orthogonal to each other, so that the capacitive sensing units 61a, 71a are correspondingly arranged in a complementary pattern, and form a rhombic grid-shaped capacitive sensing unit matrix together, and the X, Y axis electromagnetic antenna serials 66, 76 are also orthogonally arranged to each other, and form a rectangular grid-shaped electromagnetic antenna matrix together. The transparent insulating layer 30 is made of one of solid optical adhesive film (OCA) or liquid optical resin (OCR), so that the two sensing layers 60 and 70 are insulated and separated, and the two sensing layers are bonded together.
In addition, the cover film layer 50 is combined on the outer surface of the transparent conductive film sensing layer 40 to provide protection for the wiring on the sensing layer; the coating layer 50 is an insulating film with high light transmittance.
As can be seen from the above description, the present embodiment uses the transparent conductive layer as the substrate, and uses the means of overlapping the fine metal wires 63, 69, 73, 79 on the X, Y axis capacitive sensing serial 61, 71 and X, Y axis electromagnetic antenna serial 66, 76 to reduce the impedance value of the touch signal transmission path, so that the electromagnetic touch sensor can be integrated with the capacitive touch sensor to form a transparent touch sensor structure capable of being disposed in front of the screen and having dual touch functions, and in addition, the improvement of the transmission quality of the touch signal is beneficial to the design and manufacture of a touch panel with a larger size area, and the thickness of the conductive film used as the touch sensing layer can also be reduced, thereby saving the material cost and improving the transmittance of the touch sensing layer; the fine metal wires 63, 69, 73, 79 are nano-scale wires, which can be distinguished by the non-general vision in an objective way, the distribution ratio of the wires is less than 0.3% of the whole area, the shielding light transmission ratio is extremely low, even very little, most of the whole area of the whole touch sensing layer is a light-permeable hollowed-out area, and the wires have excellent light transmission, so that the fine metal wires are distributed on the sensing serial, the impedance value of the sensing serial can be greatly reduced, the signal transmission efficiency is improved, the prospective influence on the sensing serial is very little, and moreover, the conductive film is electrically connected with the fine metal wires in a lap joint way, even if the fine metal wires are broken or connected in a poor state, the conductive film has the conductive performance, so that the good signal transmission efficiency can be maintained, and the product manufacturing quality with high yield can be ensured.
In addition, as in the previous embodiment, the micro metal wires 63, 69, 73, 79 may be continuous lines, or may be wavy curves, or may be continuous lines, or may be parallel lines.
In addition, as shown in fig. 14 to 15, another embodiment is a transparent interactive capacitive touch sensor structure, which mainly has a high electrical conductivity unit (i.e. a micro metal wire in the following description of the embodiment) electrically connected to a touch signal conductor in a prospective region, so as to reduce the impedance value of a touch signal transmission path and improve the touch signal transmission efficiency.
The transparent interactive capacitive touch sensor structure comprises a substrate layer 10, wherein a color frame 11 is arranged at the peripheral part of the substrate layer 10, and the substrate layer 10 is divided into a shielding area 11a and a prospective area 11b; a plurality of rows of sensing arrays 81 are disposed in the prospective region 11b. The sensing array 81 is composed of a sensing electrode 82 and a plurality of driving electrodes 83, the sensing electrode 82 and the driving electrodes 83 are arranged in a complementary pattern, the sensing electrode 82 and each driving electrode 83 are electrically connected to an electric contact 85 arranged in the frame-type shielding region 11b through a signal guide path 84, and a micro metal wire 89 is electrically connected to the signal guide paths 84, so that one end of the micro metal wire 89 is electrically connected to the electric contact 85, and the other end is connected to the sensing electrode 82 or the driving electrode 83; the fine metal wire 89 is electrically connected to the signal guide path 84, so that the impedance value between the sensing electrode 82 and the driving electrode 83 and the electrical contact 85 can be effectively reduced, the attenuation rate of the touch signal in the transmission process is reduced, the wire diameter of the fine metal wire 89 is set below 5 μm, and the nano-scale metal wire is not distinguished by the eye vision even though being made of a non-transparent material, so that the nano-scale metal wire is suitable for being arranged in the prospective region 11b and the prospective property is not impaired.
Although the present invention has been described with reference to the above embodiments, it should be understood that the invention is not limited thereto, but may be variously modified and modified by those skilled in the art without departing from the spirit and scope of the present invention, and the scope of the present invention is defined by the appended claims.

Claims (18)

1. A method for reducing local area impedance of a transparent conductive film, comprising:
providing a transparent conductive layer;
defining at least one local area on the transparent conductive layer; and
and at least one high-electrical-conductivity unit is electrically overlapped on the local area so as to improve the electrical conductivity of the local area and reduce the impedance value of the local area, wherein the high-electrical-conductivity unit is a metal thin wire or a metal grid, and the wire diameter of the metal thin wire is less than 5 mu m.
2. The method of claim 1, wherein the transparent conductive layer is selected from one of a metal oxide film or a graphene film.
3. The method of claim 2, wherein the metal oxide film is selected from one of indium tin oxide, indium zinc oxide, zinc aluminum oxide, tin antimony oxide, and polyethylene dioxythiophene.
4. The method of claim 1, wherein the localized area is a touch sensing electrode or a touch signaling line.
5. The method of claim 1, wherein the metal fine wire material is selected from one of gold, silver, copper, aluminum, molybdenum, nickel, or alloys of the foregoing.
6. The method of claim 1, wherein the metal thin wire comprises one or more continuously extending straight lines, wavy lines, regular lines, or irregular lines.
7. The method of claim 1, wherein the metallic thin wire is comprised of a plurality of wire segments spaced apart.
8. A transparent conductive film having a low resistance value in a local area, comprising:
a transparent conductive layer having at least one defined localized area; and
and electrically lapping at least one high-electrical-conductivity unit in the local area to reduce the impedance value of the local area, wherein the high-electrical-conductivity unit is a metal thin wire or a metal grid, and the wire diameter of the metal thin wire is less than 5 mu m.
9. The transparent conductive film according to claim 8, wherein the material of the transparent conductive layer is selected from one of a metal oxide film or a graphene film.
10. The transparent conductive film according to claim 9, wherein the material of the metal oxide film is selected from one of indium tin oxide, indium zinc oxide, zinc aluminum oxide, tin antimony oxide, and polyethylene dioxythiophene.
11. The transparent conductive film of claim 8, wherein the localized area is a touch sensing electrode or a touch signal conducting line.
12. The transparent conductive film according to claim 8, wherein the metal fine wire material is selected from one of gold, silver, copper, aluminum, molybdenum, nickel, or an alloy of the foregoing materials.
13. The transparent conductive film according to claim 8, wherein the metal thin wire comprises one or more continuously extending straight lines, wavy curves, regular lines, or irregular lines.
14. The transparent conductive film according to claim 8, wherein the metal thin wire is composed of a plurality of line segments arranged at intervals.
15. A transparent touch sensor structure, comprising:
the transparent first induction layer is made of a metal oxide film or a graphene film, a plurality of first induction strings are arranged on the first induction layer, the first induction strings are formed by arranging a plurality of first induction units in rows along a first direction, a first lap joint point is arranged at one end of each first induction string, a first high-electrical conduction wire is arranged on the first induction strings along the first direction and is electrically lapped on the first lap joint point and the plurality of first induction units, the first high-electrical conduction wire is a nano-scale thin wire, and the material of the first high-electrical conduction wire is selected from gold, silver, copper, aluminum, molybdenum, nickel or alloys of the materials;
the transparent second sensing layer is made of a metal oxide film or a graphene film, a plurality of second sensing strings are arranged on the second sensing layer, the second sensing strings are formed by arranging a plurality of second sensing units in rows along a second direction, a second lap joint point is arranged at one end of the second sensing strings, a second high-electrical conduction wire is arranged on the second sensing strings along the second direction and is electrically lapped on the second lap joint point and the plurality of second sensing units, the second high-electrical conduction wire is a nano-scale thin wire, and the material of the second high-electrical conduction wire is selected from gold, silver, copper, aluminum, molybdenum, nickel or alloys of the materials;
the transparent insulating layer is arranged between the first sensing layer and the second sensing layer, so that the two sensing layers are insulated and separated from each other; and
the first sensing serial and the second sensing serial are arranged in an staggered manner, so that the first sensing units and the second sensing units are arranged in a complementary corresponding manner to form a continuous lattice-shaped sensing unit matrix.
16. A transparent touch sensor structure, comprising:
a transparent first induction layer, the material of which is selected from a metal oxide film or a graphene film, and is provided with a plurality of first capacitance induction strings and a plurality of first electromagnetic antenna strings, wherein the first capacitance induction strings are formed by arranging a plurality of first capacitance induction units in rows along a first direction, one end of each first capacitance induction string is provided with a first capacitance signal connection point, the first electromagnetic antenna strings are arranged along the first direction, one end of each first electromagnetic antenna string is provided with a first electromagnetic signal connection point, the other end of each first electromagnetic antenna string is connected with a first serial line, the first serial line is connected with a plurality of first electromagnetic antenna strings in series, and first high-electrical conductive wires which are respectively and electrically connected with each other along the first direction are formed by nanoscale micro-conductive wires, and the material of the first high-electrical conductive wires is selected from gold, silver, copper, aluminum, molybdenum, nickel or alloys of the materials;
a transparent second induction layer, the material of which is selected from a metal oxide film or a graphene film, and which is provided with a plurality of second capacitance induction strings and a plurality of second electromagnetic antenna strings, wherein the second capacitance induction strings are formed by arranging a plurality of second capacitance induction units in rows along a second direction, one end of the second capacitance induction strings is provided with a second capacitance signal connection point, the second electromagnetic antenna strings are arranged along the second direction, one end of the second electromagnetic antenna strings is provided with a second electromagnetic signal connection point, the other end of the second electromagnetic antenna strings is connected with a second serial line, the second serial line is connected with a plurality of second electromagnetic antenna strings in series, and a second high-electrical conductive wire which is arranged along the second direction is respectively and electrically connected above the second capacitance induction strings and the second electromagnetic antenna strings, the second high-electrical conductive wire is formed by a nanoscale micro-conductive wire, and the material of which is selected from gold, silver, copper, aluminum, molybdenum, nickel or alloys of the materials;
a transparent insulating layer arranged between the first sensing layer and the second sensing layer, thereby insulating and separating the two sensing layers from each other; and
the first direction and the second direction are orthogonal to each other, the plurality of first capacitance sensing serial and the plurality of second capacitance sensing serial are arranged in an staggered manner, so that the plurality of first capacitance sensing units and the plurality of second capacitance sensing units are correspondingly arranged in a complementary pattern, a continuous grid-shaped capacitance sensing unit matrix is formed together, and the plurality of first electromagnetic antenna serial and the plurality of second electromagnetic antenna serial are arranged in an orthogonal manner to each other, so that a continuous grid-shaped electromagnetic antenna matrix is formed together.
17. The transparent touch sensor structure of claim 16, wherein the first capacitive sensing series and the first electromagnetic antenna series are arranged parallel to each other and spaced apart, and the second capacitive sensing series and the second electromagnetic antenna series are arranged parallel to each other and spaced apart.
18. The utility model provides a transparent touch sensor structure, includes and sets up a transparent touch sensor on a transparent stratum basale, the central region of stratum basale is a can look into district to be equipped with the frame that is opaque in its four peripheral edge regions in order to form a shielding region, touch sensor is made by the metal oxide film, and it has plural induction array to be set up in can look into the district, induction array contains a first electric capacity induction unit and plural second electric capacity induction unit, just first electric capacity induction unit and each second electric capacity induction unit respectively through a signal guide way and electric connection to establish the electric contact in shielding region, its characterized in that: at least one high-electrical-property conducting wire is electrically connected to the signal conducting wire, the high-electrical-property conducting wire is composed of nanoscale micro-wires, and the material of the high-electrical-property conducting wire is selected from gold, silver, copper, aluminum, molybdenum, nickel or alloys of the materials.
CN201810494172.7A 2018-05-22 2018-05-22 Method for reducing local area impedance value of transparent conductive film and product thereof Active CN110515479B (en)

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CN103049124A (en) * 2011-10-13 2013-04-17 联胜（中国）科技有限公司 Touch control screen
JP3184562U (en) * 2013-04-19 2013-07-04 洋華光電股▲ふん▼有限公司 Transparent capacitive touch panel
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JP3167700U (en) * 2011-02-22 2011-05-12 洋華光電股▲ふん▼有限公司 Transparent touch control sensor
CN103049124A (en) * 2011-10-13 2013-04-17 联胜（中国）科技有限公司 Touch control screen
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