WO2020147144A1 - Capacitive touch screen and terminal device - Google Patents

Capacitive touch screen and terminal device Download PDF

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Publication number
WO2020147144A1
WO2020147144A1 PCT/CN2019/072968 CN2019072968W WO2020147144A1 WO 2020147144 A1 WO2020147144 A1 WO 2020147144A1 CN 2019072968 W CN2019072968 W CN 2019072968W WO 2020147144 A1 WO2020147144 A1 WO 2020147144A1
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WIPO (PCT)
Prior art keywords
vertical bar
bar
vertical
horizontal
horizontal bar
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PCT/CN2019/072968
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French (fr)
Chinese (zh)
Inventor
曾西平
林仪珊
李晓明
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深圳市华科创智技术有限公司
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Publication of WO2020147144A1 publication Critical patent/WO2020147144A1/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
    • 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
    • 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
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices

Definitions

  • the present invention relates to the field of touch screens, in particular to a capacitive touch screen and terminal equipment.
  • touch screens With the continuous development of science and technology, as a simple and convenient way of human-computer interaction, touch screens have been widely used in various fields of our daily life. At the same time, with the continuous improvement of people's requirements, touch screens are moving towards large size, high resolution, Light, thin, bendable, and low-cost development.
  • Traditional conductive materials are mostly indium tin oxide materials, but due to their poor performance in conductivity and flexibility and resistance to repeated deflection, silver nanowires are now used as alternative materials. Silver nanowires have the high conductivity of metallic silver and excellent flexibility. They are the best choice for transparent electrode materials for super-large, flexible touch screens.
  • the existing large-size capacitive touch screen manufacturing process is to screen or electroplate a layer of conductive metal on the conductive film material, such as silver paste, copper, molybdenum, etc., and perform predetermined pattern etching on the conductive film material printed with the silver paste.
  • a layer of conductive metal on the conductive film material such as silver paste, copper, molybdenum, etc.
  • predetermined pattern etching on the conductive film material printed with the silver paste.
  • IC integrated circuit
  • FPC Flexible Printed Circuit
  • the present invention provides a capacitive touch screen, which realizes the connection between the conductive layer and the flexible circuit board by printing a connection line in the binding area of the silver nanowire conductive layer, avoiding direct binding;
  • the etching of the circuit can also protect the silver nanowires in the binding area.
  • a capacitive touch screen includes a substrate and a silver nanowire conductive layer coated on the substrate.
  • the silver nanowire conductive layer includes a visible area and a binding area.
  • the visible area is compounded with OCA (Optically Clear Adhesive) optics Adhesive, in which: connecting lines are printed from the edge of the visible area to the binding area, and the silver nanowire conductive layer is connected to the flexible circuit board through the connecting lines.
  • OCA Optically Clear Adhesive
  • the connecting circuit is a conductive silver paste printed on the conductive layer of the silver nanowire.
  • the conductive silver paste is screen printed, sprayed, printed or transferred on the conductive layer of silver nanowires.
  • connection circuit and the flexible circuit board are connected through an anisotropic conductive film, an anisotropic conductive adhesive or silver paste.
  • connection line includes a first horizontal bar, a second horizontal bar, and a first vertical bar, a second vertical bar, ..., the nth vertical bar; the first vertical bar, the second vertical bar, ..., the nth vertical bar; The bars are parallel to each other and located between the first and second bars, and are connected to the first and second bars; the first bars are connected to the flexible circuit board, and the second bars are connected to the edge of the visible area connection.
  • the lengths of the first horizontal bar and the second horizontal bar are 0.1-8mm; the lengths of the first vertical bar, the second vertical bar, ..., the nth vertical bar are equal, all being (0.1-8/n)mm ,
  • the total length of the first vertical bar, the second vertical bar, ..., the nth vertical bar is less than the length of the first horizontal bar and the second horizontal bar;
  • the width of the first horizontal bar and the second horizontal bar is 0.1-2mm,
  • the width of the first vertical bar, the second vertical bar, ..., the nth vertical bar is 1-10mm.
  • the connecting line includes a first horizontal bar and a first vertical bar, a second vertical bar, ..., an nth vertical bar; the first vertical bar, the second vertical bar, ..., the nth vertical bar are parallel to each other and have one end It is connected with the first horizontal bar, the first horizontal bar is connected with the flexible circuit board, and the other end of the first vertical bar, the second vertical bar, ..., the n-th vertical bar is connected with the edge of the visible area.
  • the length of the first horizontal bar is 0.1-8mm; the lengths of the first vertical bar, the second vertical bar, ..., the nth vertical bar are equal, all being (0.1-8/n) mm, the first vertical bar
  • the sum of the length of the second vertical bar,..., the nth vertical bar is less than the length of the first horizontal bar; the width of the first horizontal bar is 0.1-2mm, the first vertical bar, the second vertical bar, ..., the nth
  • the width of the vertical bars is 1-10mm.
  • n is an integer.
  • the present invention also provides a terminal device, which includes the above-mentioned capacitive touch screen.
  • the capacitive touch screen of the present invention uses silver nanowires as the conductive layer, and connects the conductive layer to the flexible circuit board by printing the connection lines in the conductive layer binding area, avoiding the direct binding between the flexible circuit board and the conductive layer
  • the phenomenon of damage to the silver nanowires occurs; there is no need to etch the printed conductive silver paste, so as to avoid the generation of destructive particles that damage the visible area of the silver nanowires or the environmental pollution caused by acid-base etching.
  • connection lines in the binding area the silver nanowires from the binding area to the edge of the visible area can also be protected.
  • the printed connection line is convenient for hot pressing and bonding with the flexible circuit board, which reduces the difficulty of alignment when the flexible circuit board is bound, and improves the conduction efficiency of the flexible circuit board.
  • FIG. 1 is a structural cross-sectional view of the capacitive touch screen of the present invention
  • FIG. 2 is a front view of the structure of the first embodiment of the capacitive touch screen of the present invention.
  • Figure 3 is an enlarged view of part A in Figure 2;
  • FIG. 4 is a front view of the structure of the second embodiment of the capacitive touch screen of the present invention.
  • Figure 5 is an enlarged view of part B in Figure 4.
  • FIG. 6 is a schematic diagram of the connection line structure of the third embodiment of the capacitive touch screen of the present invention.
  • FIG. 7 is a schematic diagram of the connection line structure of the fourth embodiment of the capacitive touch screen of the present invention.
  • FIG. 8 is a schematic diagram of the connection line structure of the fifth embodiment of the capacitive touch screen of the present invention.
  • FIG. 9 is a front view of the structure of the sixth embodiment of the capacitive touch screen of the present invention.
  • Figure 10 is an enlarged view of part C in Figure 6;
  • FIG. 11 is a schematic diagram of the connection line structure of the seventh embodiment of the capacitive touch screen of the present invention.
  • FIG. 12 is a schematic diagram of the connection line structure of the eighth embodiment of the capacitive touch screen of the present invention.
  • FIG. 13 is a schematic diagram of the connection line structure of the ninth embodiment of the capacitive touch screen of the present invention.
  • connection line structure of the tenth embodiment of the capacitive touch screen of the present invention is a schematic diagram of the connection line structure of the tenth embodiment of the capacitive touch screen of the present invention.
  • a capacitive touch screen as shown in Figure 1, includes a substrate 1 and a silver nanowire conductive layer 2 coated on the substrate 1.
  • the silver nanowire conductive layer 2 includes a visible area 21 and a binding area 22.
  • OCA optical glue 3 is compounded on the viewing area 21, wherein a connecting circuit 4 is printed from the edge of the viewing area 21 to the binding area 22, and the silver nanowire conductive layer 2 is connected to the flexible circuit board 5 through the connecting circuit 4.
  • silver nanowires are used as the conductive layer 2.
  • the conductive layer 2 with good conductivity is formed by coating and curing the silver nanowire conductive paste on the surface of the substrate 1.
  • the visible area 21 is protected by the composite OCA optical glue 3.
  • the conductive layer 2 of silver nanowires in the binding area 22 is exposed, which is easily damaged and affects the performance of the entire touch screen; the present invention realizes the silver nanowires by printing the connection lines 4 in the binding area 22 of the conductive layer.
  • connection of the conductive layer 2 and the flexible circuit board 5 avoids damage to the silver nanowires caused by the direct binding of the flexible circuit board 5 and the conductive layer 2; on the other hand, it can also realize the edge of the binding area 22 Protection of the silver nanowires to the viewing area 21.
  • the substrate 1 is any of PET (Polyethylene terephthalate), COP (Cyclo Olefin Polymers), TAC (Triacetyl Cellulose), PVC (Polyvinyl chloride), PI (Polyimide), PE (polyethylene) One kind.
  • PET Polyethylene terephthalate
  • COP Cyclo Olefin Polymers
  • TAC Triacetyl Cellulose
  • PVC Polyvinyl chloride
  • PI Polyimide
  • PE polyethylene
  • the substrate 1 is PET polyethylene terephthalate.
  • the connecting circuit 4 is a conductive silver paste printed on the conductive layer 2 of silver nanowires.
  • the conductive silver paste is a low-temperature baking conductive silver paste, which is made of high-performance resin and silver powder with excellent conductivity, and has excellent printability, conductivity, and hardness. And the adhesion and oxidation resistance are excellent.
  • the conductive silver paste is used to realize the conduction between the conductive layer 2 and the flexible circuit board 5, which avoids the phenomenon that the two are directly bound to damage the silver nanowires.
  • silver nanowires are used as the conductive layer 2, only the visible area 21 of the conductive layer needs to be etched, and the conductive silver paste printed in the binding area 22 does not need to be etched, which avoids the occurrence of destructive particles during the etching process.
  • the conductive layer of the silver nanowire in the viewing zone 21 causes damage, and at the same time avoids environmental pollution caused by acid-base etching.
  • laser etching is used for the visible area 21 of the conductive layer.
  • conductive silver paste is screen printed, sprayed, printed or transferred on the conductive layer 2 of silver nanowires.
  • the printed conductive silver paste is cured by drying or UV (ultraviolet) curing.
  • the connecting circuit 4 and the flexible circuit board 5 are connected through an anisotropic conductive film, an anisotropic conductive adhesive or silver paste.
  • anisotropic conductive film, anisotropic conductive glue or silver paste is used as a conductive medium to be pasted on the flexible circuit board 5, and then a hot press is used to connect the connecting circuit 4 and the flexible circuit
  • the board 5 is press-fitted and bound to realize the fixed-directional communication.
  • conductive silver paste is printed through the binding area, the conductive silver paste does not need to be etched, the alignment difficulty of the flexible circuit board 5 and the conductive silver paste is reduced, the hot pressing is convenient, and the flexible circuit board can be improved The conduction efficiency of 5.
  • the lead wires at the edge of the conductive layer 2 are connected to the touch chip by a flexible circuit board 5 link.
  • the multiple sensing circuits obtained by etching on the visible area 21 of the conductive layer are electrically connected to the flexible circuit board 5 through lead wires.
  • a circle of conductive silver paste is printed on the border of the conductive layer to realize wiring, but this method can only be used for single-layer wiring.
  • a narrow bezel design cannot be realized due to the large number of channels.
  • the wiring of the capacitive touch screen of the present invention is realized by flexible circuit board FPC instead of printed conductive silver paste, so the ultra-narrow frame of the touch screen can be realized in the form of a multilayer board.
  • the technical solution of the capacitive touch screen of the present invention is also suitable for conductive layers of silver nano-particle conductive paste, copper nano-wire conductive paste, copper nano-particle conductive paste, gold nano-wire conductive paste, and gold nano-particle conductive paste.
  • the pattern of the connecting line 4 may be in various forms, and the present invention does not make specific limitations, and is selected on the principle of not affecting the appearance of the visible area and facilitating binding.
  • the connecting line 4 includes a first horizontal bar 6, a second horizontal bar 7, and a first vertical bar, a second vertical bar, ..., the nth vertical bar; the first vertical bar , The second vertical bar..., the nth vertical bar are parallel to each other and located between the first horizontal bar 6 and the second horizontal bar 7, and are connected to the first horizontal bar 6 and the second horizontal bar 7; the first horizontal bar 6 It is connected to the flexible circuit board 5, and the second horizontal bar 7 is connected to the edge of the viewing area 21.
  • the length S1 of the first horizontal bar 6 and the second horizontal bar 7 is 0.1-8mm; the length S2 of the first vertical bar 8, the second vertical bar 9, ..., the n-th vertical bar are equal, both ( 0.1-8/n)mm, the total length of the first vertical bar 8, the second vertical bar 9,..., the n-th vertical bar is less than the length of the first horizontal bar 6 and the second horizontal bar 7, 1 ⁇ n ⁇ 10 , N is an integer; the width h1 of the first horizontal bar 6 and the width h2 of the second horizontal bar 7 are 0.1-2mm, and the width d of the first vertical bar 8, the second vertical bar 9, ..., the n-th vertical bar is 1-10mm.
  • the connecting line 4 has an I-shaped structure, and the connecting line 4 includes a first horizontal bar 6, a second horizontal bar 7, and a first vertical bar. 8.
  • the first vertical bar 8 connects the first horizontal bar 6 and the second horizontal bar 7, the first horizontal bar 6 is connected to the flexible circuit board 5, and the second horizontal bar 7 is connected to the edge of the viewing area 21.
  • the length S1 of the first horizontal bar 6 and the second horizontal bar 7 is 0.1-8 mm
  • the length S2 of the first vertical bar 8 is 0.1-8 mm
  • the length S1 of the first horizontal bar 6 and the second horizontal bar 7 It is greater than the length S2 of the first vertical bar 8
  • the width h1 of the first horizontal bar 6 and the width h2 of the second horizontal bar 7 are 0.1-2 mm
  • the width d of the first vertical bar 8 is 1-10 mm.
  • the length S1 of the first horizontal bar 6 and the second horizontal bar 7 is 5mm, and the length S2 of the first vertical bar 8 is 1.5mm;
  • the width h1 of 6 is 2 mm, the width h2 of the second horizontal bar 7 is 1.5 mm, and the width d of the first vertical bar 8 is 3 mm.
  • connection route is a "III"-like structure, and the connection route includes a first horizontal bar 6, a second horizontal bar 7, and a first vertical bar 8.
  • the second vertical bar 9 and the third vertical bar 10; the first vertical bar 8, the second vertical bar 9, the third vertical bar 10 are parallel to each other and located between the first horizontal bar 6 and the second horizontal bar 7, and A horizontal bar 6 is connected with the second horizontal bar 7; the first horizontal bar 6 is connected with the flexible circuit board 5, and the second horizontal bar 7 is connected with the edge of the viewing area 21.
  • the length S1 of the first horizontal bar 6 and the second horizontal bar 7 is 8mm; the first vertical bar 8, the second vertical bar 9, and the third vertical bar
  • the length S2 of 10 is equal, both are 2mm; the width h1 of the first horizontal bar 6 is 2mm, the width h2 of the second horizontal bar 7 is 2mm, the first vertical bar 8, the second vertical bar 9, and the third vertical bar 10
  • the width d is 3mm.
  • the connection line includes a first horizontal bar, a second horizontal bar and a first vertical bar, a second vertical bar, a third vertical bar, a fourth vertical bar and a first vertical bar.
  • Five vertical bars; the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar and the fifth vertical bar are parallel to each other and are located between the first horizontal bar and the second horizontal bar, and the first horizontal bar and
  • the second horizontal bar is connected; the first horizontal bar is connected with the flexible circuit board, and the second horizontal bar is connected with the edge of the visible area.
  • the length of the first horizontal bar and the second horizontal bar is 6mm; the lengths of the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, and the fifth vertical bar are equal, and they are all 1mm;
  • the width of the horizontal bar is 1.8 mm, the width of the second horizontal bar is 1.2 mm, and the width of the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, and the fifth vertical bar are 5 mm.
  • the connection line includes a first horizontal bar, a second horizontal bar, a first vertical bar, a second vertical bar, a third vertical bar, a fourth vertical bar, and a first vertical bar.
  • Five vertical bars, sixth vertical bars and seventh vertical bars; the first vertical bar, second vertical bar, third vertical bar, fourth vertical bar, fifth vertical bar, sixth vertical bar and seventh vertical bar are parallel to each other It is located between the first horizontal bar and the second horizontal bar, and is connected with the first horizontal bar and the second horizontal bar; the first horizontal bar is connected with the flexible circuit board, and the second horizontal bar is connected with the edge of the visible area.
  • the length of the first horizontal bar and the second horizontal bar is 7mm;
  • the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, the fifth vertical bar, the sixth vertical bar and the seventh vertical bar Are equal in length, 0.8mm;
  • the width of the first horizontal bar is 0.9mm, the width of the second horizontal bar is 0.8mm, the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, and the The width of the five vertical bars, the sixth vertical bar and the seventh vertical bar is 6mm.
  • the connection line includes a first horizontal bar, a second horizontal bar, a first vertical bar, a second vertical bar, a third vertical bar, a fourth vertical bar, and a first vertical bar.
  • the five vertical bars, the sixth vertical bar, the seventh vertical bar, the eighth vertical bar, the ninth vertical bar and the tenth vertical bar are parallel to each other and are located between the first horizontal bar and the second horizontal bar.
  • the second horizontal bar is connected; the first horizontal bar is connected with the flexible circuit board, and the second horizontal bar is connected with the edge of the visible area.
  • the length of the first horizontal bar and the second horizontal bar is 4mm; the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, the fifth vertical bar, the sixth vertical bar, and the seventh vertical bar ,
  • the eighth, ninth and tenth vertical bars are equal in length, 0.2mm; the first horizontal bar has a width of 0.4mm, and the second horizontal bar has a width of 0.4mm.
  • the width of the second vertical bar, the third vertical bar, the fourth vertical bar, the fifth vertical bar, the sixth vertical bar, the seventh vertical bar, the eighth vertical bar, the ninth vertical bar and the tenth vertical bar are 3mm.
  • the connecting line 4 includes a first horizontal bar 6 and a first vertical bar 8, a second vertical bar 9, ..., an nth vertical bar; the first vertical bar 8, the second vertical bar
  • the vertical bars 9,..., the nth vertical bar are parallel to each other and one end is connected to the first horizontal bar 6, the first horizontal bar 6 is connected to the flexible circuit board 5, the first vertical bar 8, the second vertical bar 9, ... , The other end of the nth vertical bar is connected to the edge of the viewing area 21.
  • the connecting route is similar to an inverted "mountain"-shaped structure, and the connecting route includes a first horizontal bar 6, a first vertical bar 8, and a second vertical bar.
  • the third vertical bar 10; the first vertical bar 8, the second vertical bar 9, and the third vertical bar 10 are parallel to each other and one end is connected to the first horizontal bar 6, and the first horizontal bar 6 is connected to the flexible circuit board 5.
  • the other ends of the first vertical bar 8, the second vertical bar 9, and the third vertical bar 10 are connected to the edge of the viewing area 21.
  • the length S1 of the first horizontal bar 6 is 0.1-8mm; the lengths S2 of the first vertical bar 8, the second vertical bar 9, ..., the n-th vertical bar are equal, all (0.1-8/n) mm, the total length of the first vertical bar 8, the second vertical bar 9, ..., the n-th vertical bar is less than the length of the first horizontal bar 6, 1 ⁇ n ⁇ 10, n is an integer; the width of the first horizontal bar 6 h is 0.1-2mm, and the width d of the first vertical bar 8, the second vertical bar 9, ..., the n-th vertical bar is 1-10mm. As shown in FIG.
  • the length S1 of the first horizontal bar 6 is 3mm; the length S2 of the first vertical bar 8, the second vertical bar 9, and the third vertical bar 10 are equal, all
  • the width h of the first horizontal bar 6 is 1.2 mm, and the width d of the first vertical bar 8, the second vertical bar 9, and the third vertical bar 10 is 2 mm.
  • the connection route includes a first horizontal bar and a first vertical bar, one end of the first vertical bar is connected to the first horizontal bar, and the first horizontal bar is connected to the flexible circuit board. Connect, the other end of the first vertical bar is connected with the edge of the viewing area.
  • the length of the first horizontal bar is 8 mm
  • the length of the first vertical bar is 2 mm
  • the width of the first horizontal bar is 1.8 mm
  • the width of the first vertical bar is 10 mm.
  • the connection line includes a first horizontal bar and a first vertical bar, a second vertical bar, a third vertical bar, a fourth vertical bar, and a fifth vertical bar;
  • One vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, and the fifth vertical bar are parallel to each other and one end is connected with the first horizontal bar, the first horizontal bar is connected with the flexible circuit board, the first vertical bar,
  • the other ends of the second vertical bar, the third vertical bar, the fourth vertical bar, and the fifth vertical bar are connected to the edge of the visible area.
  • the length of the first horizontal bar is 1mm; the lengths of the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, and the fifth vertical bar are all equal to 0.1mm; the width of the first horizontal bar The width of the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, and the fifth vertical bar are 1mm.
  • the connection line includes a first horizontal bar and a first vertical bar, a second vertical bar, a third vertical bar, a fourth vertical bar, a fifth vertical bar, and a first vertical bar.
  • Six vertical bars and seventh vertical bars; the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, the fifth vertical bar, the sixth vertical bar, and the seventh vertical bar are parallel to each other and one end is connected to the first vertical bar.
  • Horizontal bar connection the first horizontal bar is connected to the flexible circuit board, the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, the fifth vertical bar, the sixth vertical bar and the seventh vertical bar The other end is connected to the edge of the viewing area.
  • the length of the first horizontal bar is 7mm; the lengths of the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, the fifth vertical bar, the sixth vertical bar, and the seventh vertical bar are equal, all 0.8mm; the width of the first horizontal bar is 0.9mm, the width of the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, the fifth vertical bar, the sixth vertical bar and the seventh vertical bar It is 6mm.
  • connection line includes a first horizontal bar and a first vertical bar, a second vertical bar, a third vertical bar, a fourth vertical bar, a fifth vertical bar, and a first vertical bar.
  • the six vertical bars, seventh vertical bars, eighth vertical bars, ninth vertical bars, and tenth vertical bars; the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, the fifth vertical bar, and the The six vertical bars, the seventh vertical bar, the eighth vertical bar, the ninth vertical bar and the tenth vertical bar are parallel to each other and one end is connected to the first horizontal bar, the first horizontal bar is connected to the flexible circuit board, the first vertical bar, The other end of the second vertical bar, the third vertical bar, the fourth vertical bar, the fifth vertical bar, the sixth vertical bar, the seventh vertical bar, the eighth vertical bar, the ninth vertical bar and the tenth vertical bar and the visible The edge of the area is connected.
  • the length of the first horizontal bar is 4mm; the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, the fifth vertical bar, the sixth vertical bar, the seventh vertical bar, and the eighth vertical bar , The length of the ninth vertical bar and the tenth vertical bar are equal, both are 0.2mm; the width of the first horizontal bar is 0.4mm, the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, and the The widths of the five vertical bars, the sixth vertical bars, the seventh vertical bars, the eighth vertical bars, the ninth vertical bars and the tenth vertical bars are 3mm.
  • the present invention realizes the directional conduction of the conductive layer and the flexible circuit board, saves the amount of conductive silver paste, reduces the manufacturing cost of the touch screen, and realizes the binding area Protection of silver nanowires.
  • the connecting line is in the shape of "I", "III” or inverted “Mountain” shape, that is, n is 1 or 3. At this time, both the conduction and protection effect can be achieved, and the maximum degree The cost is saved, the printing process is simpler, and the preparation process is simplified.
  • silver nanowires are used as the conductive layer, and the conductive silver paste is printed in the conductive layer binding area to realize the connection between the conductive layer and the flexible circuit board, avoiding direct binding between the flexible circuit board and the conductive layer.
  • the protection of the silver nanowires from the binding area to the visible area can also be achieved. At the same time, it can also facilitate the hot pressing and bonding with the flexible circuit board, which reduces the difficulty of alignment when the flexible circuit board is bound, and improves the conduction efficiency of the flexible circuit board.
  • the present invention also provides a terminal device, which includes the above-mentioned capacitive touch screen.
  • the terminal devices are mobile phones, computers, TVs, etc., especially terminal devices such as large-size TVs and teaching instruments.

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Abstract

A capacitive touch screen, comprising a substrate (1) and a silver nanowire conducting layer (2) coated on the substrate (1); the silver nanowire conducting layer (2) comprises a visible area (21) and a binding area (22), an optically clear adhesive (OCA) (3) being attached to the visible area (21); a connecting line (4) is printed from the inner edge of the visible area (21) to the binding area (22), and the silver nanowire conducting layer (2) is connected to a flexible circuit board (5) by means of the connecting line (4). In the capacitive touch screen, the silver nanowire is used as a conducting layer, and the connecting line is printed in the binding area of the conducting layer, achieving the connection of the conducting layer and the flexible circuit board, avoiding damage to the silver nanowire caused by directly binding between the flexible circuit board and the conducting layer; and printed silver paste does not need to be etched, avoiding destructive particles generated by laser etching or an environmental pollution problem caused by acid-base etching. The printing of the connecting line is also able to protect the silver nanowire from the binding area to the visible area of the conducting layer.

Description

一种电容式触摸屏及终端设备Capacitive touch screen and terminal equipment
本公开基于申请号为201910037111.2，申请日为2019年1月15日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请作为参考。This disclosure is based on a Chinese patent application with an application number of 201910037111.2 and an application date of January 15, 2019, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is hereby incorporated by reference into this application.
技术领域Technical field
本发明涉及触摸屏领域，尤其涉及一种电容式触摸屏及终端设备。The present invention relates to the field of touch screens, in particular to a capacitive touch screen and terminal equipment.
背景技术Background technique
随着科技的不断发展，触摸屏作为一种简单、便捷的人机交互方式，已经广泛应用于我们日常生活的各个领域，同时随着人们要求的不断提高，触摸屏正向着大尺寸、高解析度、轻、薄、可弯曲、低成本等方向发展。传统的导电材料多为氧化铟锡材料，但由于其在导电性和柔性方面表现较差、不耐反复挠曲，现多选用银纳米线作为替代材料。银纳米线具有金属银的高导电性、绝佳的柔韧性，是超大尺寸、柔性触摸屏的透明电极材料的最佳选择。With the continuous development of science and technology, as a simple and convenient way of human-computer interaction, touch screens have been widely used in various fields of our daily life. At the same time, with the continuous improvement of people's requirements, touch screens are moving towards large size, high resolution, Light, thin, bendable, and low-cost development. Traditional conductive materials are mostly indium tin oxide materials, but due to their poor performance in conductivity and flexibility and resistance to repeated deflection, silver nanowires are now used as alternative materials. Silver nanowires have the high conductivity of metallic silver and excellent flexibility. They are the best choice for transparent electrode materials for super-large, flexible touch screens.
现有的大尺寸电容式触摸屏制造工艺为在导电薄膜材料上丝印或者电镀一层导电金属，例如银浆、铜、钼等，并对印刷好银浆的导电薄膜材料进行预设的图案蚀刻，以便根据不同IC(integrated circuit)方案进行配套驱动程序达到触摸的目的；然后将用作导电介质的异向导电胶带贴覆在挠性线路板(FPC，Flexible Printed Circuit)上，以进行挠性线路板热压绑定，使绑定后的挠性线路板通过导电金属和导电薄膜材料由蚀刻成预设图案的银浆层实现定向导通。但是在用激光方法蚀刻边框的印刷的导电银浆时，容易产生微米级的金属颗粒，进而损伤可视区的纳米银线等，造成良率偏低。同时若选用酸性油墨或者蚀刻膏进行蚀刻，除了清洗工艺繁琐，还容易产生环境污染外，也容易腐蚀可视区的纳米银线。The existing large-size capacitive touch screen manufacturing process is to screen or electroplate a layer of conductive metal on the conductive film material, such as silver paste, copper, molybdenum, etc., and perform predetermined pattern etching on the conductive film material printed with the silver paste. In order to match the driver program according to different IC (integrated circuit) schemes to achieve the purpose of touch; then paste the non-directional conductive tape used as the conductive medium on the flexible printed circuit (FPC, Flexible Printed Circuit) to perform the flexible circuit The board is hot-pressed and bonded, so that the bonded flexible circuit board is oriented by the silver paste layer etched into a preset pattern through the conductive metal and the conductive film material. However, when the printed conductive silver paste of the frame is etched by the laser method, micron-level metal particles are easily generated, which in turn damages the nano-silver wires in the visible area, resulting in a low yield. At the same time, if acid ink or etching paste is used for etching, in addition to the cumbersome cleaning process, it is also easy to cause environmental pollution, and it is also easy to corrode the nano silver wires in the visible area.
发明内容Summary of the invention
针对以上技术问题，本发明提供一种电容式触摸屏，通过在银纳米线导电层绑定区印刷一个连接线路，实现导电层与挠性线路板的连接，避免直接绑定；不需对印刷连接线路进行蚀刻，还可起到对绑定区银纳米线的保护作用。In view of the above technical problems, the present invention provides a capacitive touch screen, which realizes the connection between the conductive layer and the flexible circuit board by printing a connection line in the binding area of the silver nanowire conductive layer, avoiding direct binding; The etching of the circuit can also protect the silver nanowires in the binding area.
本发明采用以下技术方案：The present invention adopts the following technical solutions:
一种电容式触摸屏，包括基材和涂布在基材上的银纳米线导电层，银纳米线导电层包括可视区和绑定区，可视区上复合有OCA(Optically Clear Adhesive)光学胶，其中：可视区的边缘到绑定区印刷有连接线路，通过连接线路将银纳米线导电层与挠性线路板连接。A capacitive touch screen includes a substrate and a silver nanowire conductive layer coated on the substrate. The silver nanowire conductive layer includes a visible area and a binding area. The visible area is compounded with OCA (Optically Clear Adhesive) optics Adhesive, in which: connecting lines are printed from the edge of the visible area to the binding area, and the silver nanowire conductive layer is connected to the flexible circuit board through the connecting lines.
进一步的，连接线路为印刷在银纳米线导电层上的导电银浆。Further, the connecting circuit is a conductive silver paste printed on the conductive layer of the silver nanowire.
进一步的，导电银浆网版印刷、喷涂、打印或转印在银纳米线导电层上。Further, the conductive silver paste is screen printed, sprayed, printed or transferred on the conductive layer of silver nanowires.
进一步的，连接线路和挠性线路板通过异方性导电膜、异方性导电胶或银浆粘合导通。Further, the connection circuit and the flexible circuit board are connected through an anisotropic conductive film, an anisotropic conductive adhesive or silver paste.
进一步的，连接线路包括第一横条、第二横条和第一竖条、第二竖条、……、第n竖条；第一竖条、第二竖条、……、第n竖条相互平行并位于第一横条和第二横条之间，与第一横条和第二横条连接；第一横条与挠性线路板连接，第二横条与可视区的边缘连接。Further, the connection line includes a first horizontal bar, a second horizontal bar, and a first vertical bar, a second vertical bar, ..., the nth vertical bar; the first vertical bar, the second vertical bar, ..., the nth vertical bar; The bars are parallel to each other and located between the first and second bars, and are connected to the first and second bars; the first bars are connected to the flexible circuit board, and the second bars are connected to the edge of the visible area connection.
进一步的，第一横条和第二横条的长度为0.1-8mm；第一竖条、第二竖条、……、第n竖条的长度相等，均为(0.1-8/n)mm，第一竖条、第二竖条、……、第n竖条的长度总和小于第一横条和第二横条的长度；第一横条和第二横条的宽度为0.1-2mm，第一竖条、第二竖条、……、第n竖条的宽度为1-10mm。Further, the lengths of the first horizontal bar and the second horizontal bar are 0.1-8mm; the lengths of the first vertical bar, the second vertical bar, ..., the nth vertical bar are equal, all being (0.1-8/n)mm , The total length of the first vertical bar, the second vertical bar, ..., the nth vertical bar is less than the length of the first horizontal bar and the second horizontal bar; the width of the first horizontal bar and the second horizontal bar is 0.1-2mm, The width of the first vertical bar, the second vertical bar, ..., the nth vertical bar is 1-10mm.
进一步的，连接线路包括第一横条和第一竖条、第二竖条、……、第n竖条；第一竖条、第二竖条、……、第n竖条相互平行并一端与第一横条连接，第一横条与挠性线路板连接，第一竖条、第二竖条、……、第n竖条的另一端与可视区的边缘连接。Further, the connecting line includes a first horizontal bar and a first vertical bar, a second vertical bar, ..., an nth vertical bar; the first vertical bar, the second vertical bar, ..., the nth vertical bar are parallel to each other and have one end It is connected with the first horizontal bar, the first horizontal bar is connected with the flexible circuit board, and the other end of the first vertical bar, the second vertical bar, ..., the n-th vertical bar is connected with the edge of the visible area.
进一步的，第一横条的长度为0.1-8mm；第一竖条、第二竖条、……、第n竖条的长度相等，均为(0.1-8/n)mm，第一竖条、第二竖条、……、第n竖条的长度总和小于第一横条的长度；第一横条的宽度为0.1-2mm，第一竖条、第二竖条、……、第n竖条的宽度为1-10mm。Further, the length of the first horizontal bar is 0.1-8mm; the lengths of the first vertical bar, the second vertical bar, ..., the nth vertical bar are equal, all being (0.1-8/n) mm, the first vertical bar The sum of the length of the second vertical bar,..., the nth vertical bar is less than the length of the first horizontal bar; the width of the first horizontal bar is 0.1-2mm, the first vertical bar, the second vertical bar, ..., the nth The width of the vertical bars is 1-10mm.
进一步的，1≤n≤10，n为整数。Further, 1≤n≤10, and n is an integer.
本发明还提供一种终端设备，该终端设备包括上述电容式触摸屏。The present invention also provides a terminal device, which includes the above-mentioned capacitive touch screen.
本发明的电容式触摸屏，以银纳米线作为导电层，通过在导电层绑定区印刷连接线路，实现导电层与挠性线路板的连接，避免了因挠性线路板与导电层直接绑定而产生的损坏银纳米线的现象；不需要对印刷的导电银浆进行蚀刻，避免产生破坏性的颗粒损伤可视区银纳米线或者酸碱蚀刻带来的环境污染问题。通过在绑定区印刷连接线路，还可实现对从绑定区到可视区边缘的银纳米线的保护。同时印刷的连接线路方便与挠性线路板进行热压贴合，减少了挠性线路板绑定时的对位难度，提高了挠性线路板的导通效率。The capacitive touch screen of the present invention uses silver nanowires as the conductive layer, and connects the conductive layer to the flexible circuit board by printing the connection lines in the conductive layer binding area, avoiding the direct binding between the flexible circuit board and the conductive layer The phenomenon of damage to the silver nanowires occurs; there is no need to etch the printed conductive silver paste, so as to avoid the generation of destructive particles that damage the visible area of the silver nanowires or the environmental pollution caused by acid-base etching. By printing connection lines in the binding area, the silver nanowires from the binding area to the edge of the visible area can also be protected. At the same time, the printed connection line is convenient for hot pressing and bonding with the flexible circuit board, which reduces the difficulty of alignment when the flexible circuit board is bound, and improves the conduction efficiency of the flexible circuit board.
附图说明BRIEF DESCRIPTION
为了更清楚的说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单的介绍，显而易见的，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它附图。In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.
图1为本发明的电容式触摸屏的结构剖视图；FIG. 1 is a structural cross-sectional view of the capacitive touch screen of the present invention;
图2为本发明的电容式触摸屏的第一种实施例的结构主视图；2 is a front view of the structure of the first embodiment of the capacitive touch screen of the present invention;
图3为图2中的A部放大图；Figure 3 is an enlarged view of part A in Figure 2;
图4为本发明的电容式触摸屏的第二种实施例的结构主视图；4 is a front view of the structure of the second embodiment of the capacitive touch screen of the present invention;
图5为图4中的B部放大图；Figure 5 is an enlarged view of part B in Figure 4;
图6为本发明的电容式触摸屏的第三种实施例的连接线路结构示意图；6 is a schematic diagram of the connection line structure of the third embodiment of the capacitive touch screen of the present invention;
图7为本发明的电容式触摸屏的第四种实施例的连接线路结构示意图；7 is a schematic diagram of the connection line structure of the fourth embodiment of the capacitive touch screen of the present invention;
图8为本发明的电容式触摸屏的第五种实施例的连接线路结构示意图；8 is a schematic diagram of the connection line structure of the fifth embodiment of the capacitive touch screen of the present invention;
图9为本发明的电容式触摸屏的第六种实施例的结构主视图；9 is a front view of the structure of the sixth embodiment of the capacitive touch screen of the present invention;
图10为图6中的C部放大图；Figure 10 is an enlarged view of part C in Figure 6;
图11为本发明的电容式触摸屏的第七种实施例的连接线路结构示意图；11 is a schematic diagram of the connection line structure of the seventh embodiment of the capacitive touch screen of the present invention;
图12为本发明的电容式触摸屏的第八种实施例的连接线路结构示意图；12 is a schematic diagram of the connection line structure of the eighth embodiment of the capacitive touch screen of the present invention;
图13为本发明的电容式触摸屏的第九种实施例的连接线路结构示意图；13 is a schematic diagram of the connection line structure of the ninth embodiment of the capacitive touch screen of the present invention;
图14为本发明的电容式触摸屏的第十种实施例的连接线路结构示意图；14 is a schematic diagram of the connection line structure of the tenth embodiment of the capacitive touch screen of the present invention;
图中：1-基材，2-导电层，21-可视区，22-绑定区，3-OCA光学胶，4-连接 线路，5-挠性线路板，6-第一横条，7-第二横条，8-第一竖条，9-第二竖条，10-第三竖条。In the picture: 1-substrate, 2-conducting layer, 21-viewable area, 22-binding area, 3-OCA optical glue, 4-connection circuit, 5-flexible circuit board, 6-first horizontal bar, 7-second horizontal bar, 8-first vertical bar, 9-second vertical bar, 10-third vertical bar.
具体实施方式detailed description
下面将结合本发明中的附图，对本发明实施例中的技术方案进行清楚、完整的描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通的技术人员在没有做出创造性劳动的前提下所获得的所有其它实施例，都属于本发明的保护范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
一种电容式触摸屏，如图1所示，包括基材1和涂布在基材1上的银纳米线导电层2，银纳米线导电层2包括可视区21和绑定区22，可视区21上复合有OCA光学胶3，其中：可视区21的边缘到绑定区22印刷有连接线路4，通过连接线路4将银纳米线导电层2与挠性线路板5连接。A capacitive touch screen, as shown in Figure 1, includes a substrate 1 and a silver nanowire conductive layer 2 coated on the substrate 1. The silver nanowire conductive layer 2 includes a visible area 21 and a binding area 22. OCA optical glue 3 is compounded on the viewing area 21, wherein a connecting circuit 4 is printed from the edge of the viewing area 21 to the binding area 22, and the silver nanowire conductive layer 2 is connected to the flexible circuit board 5 through the connecting circuit 4.
本发明的电容式触摸屏，以银纳米线作为导电层2，通过在基材1表面涂布固化银纳米线导电浆料，形成具有良好导电性能的导电层2，但由于银纳米线较脆弱，在可视区21通过复合OCA光学胶3进行保护。常规条件下绑定区22的银纳米线导电层2处于裸露状态，易被损坏而影响整个触摸屏的性能；本发明通过在导电层绑定区22印刷连接线路4，一方面实现了银纳米线导电层2与挠性线路板5的连接，避免了因挠性线路板5与导电层2直接绑定而产生的损坏银纳米线的现象；另一方面，还可实现对绑定区22边缘到可视区21的银纳米线的保护。In the capacitive touch screen of the present invention, silver nanowires are used as the conductive layer 2. The conductive layer 2 with good conductivity is formed by coating and curing the silver nanowire conductive paste on the surface of the substrate 1. However, because the silver nanowires are relatively fragile, The visible area 21 is protected by the composite OCA optical glue 3. Under normal conditions, the conductive layer 2 of silver nanowires in the binding area 22 is exposed, which is easily damaged and affects the performance of the entire touch screen; the present invention realizes the silver nanowires by printing the connection lines 4 in the binding area 22 of the conductive layer. The connection of the conductive layer 2 and the flexible circuit board 5 avoids damage to the silver nanowires caused by the direct binding of the flexible circuit board 5 and the conductive layer 2; on the other hand, it can also realize the edge of the binding area 22 Protection of the silver nanowires to the viewing area 21.
在本发明的一些实施例中，基材1为PET(Polyethylene terephthalate)、COP(Cyclo Olefin Polymers)、TAC(Triacetyl Cellulose)、PVC(Polyvinyl chloride)、PI(Polyimide)、PE(polyethylene)中的任意一种。优选的，基材1为PET聚对苯二甲酸乙二醇酯。In some embodiments of the present invention, the substrate 1 is any of PET (Polyethylene terephthalate), COP (Cyclo Olefin Polymers), TAC (Triacetyl Cellulose), PVC (Polyvinyl chloride), PI (Polyimide), PE (polyethylene) One kind. Preferably, the substrate 1 is PET polyethylene terephthalate.
在本发明的一些实施例中，连接线路4为印刷在银纳米线导电层2上的导电银浆。具体的，在本发明的一些实施例中，导电银浆为低温烘烤型导电银浆，是由高性能树脂和导电性能极佳的银粉制作而成，有着优良的印刷性、导电性、硬度和附着力、抗氧化性能优异等特点。通过印刷导电银浆，一方面与挠性线路板4连接实现导通；另一方面，由于OCA光学胶3保护层仅覆盖在银纳米线 导电层2的可视区21，绑定区22裸露在外，通过印刷导电银浆可起到对绑定区22的保护。同时利用导电银浆实现导电层2与挠性线路板5的导通，避免了二者直接绑定而产生损坏银纳米线的现象。In some embodiments of the present invention, the connecting circuit 4 is a conductive silver paste printed on the conductive layer 2 of silver nanowires. Specifically, in some embodiments of the present invention, the conductive silver paste is a low-temperature baking conductive silver paste, which is made of high-performance resin and silver powder with excellent conductivity, and has excellent printability, conductivity, and hardness. And the adhesion and oxidation resistance are excellent. By printing conductive silver paste, on the one hand, it is connected to the flexible circuit board 4 to achieve conduction; on the other hand, since the protective layer of the OCA optical glue 3 only covers the visible area 21 of the silver nanowire conductive layer 2, the binding area 22 is exposed In addition, the bonding area 22 can be protected by printing conductive silver paste. At the same time, the conductive silver paste is used to realize the conduction between the conductive layer 2 and the flexible circuit board 5, which avoids the phenomenon that the two are directly bound to damage the silver nanowires.
本发明以银纳米线作为导电层2，只需对导电层可视区21进行蚀刻，对于绑定区22印刷的导电银浆无需蚀刻，避免了因蚀刻过程中破坏性颗粒的产生而对可视区21的银纳米线导电层造成破坏的现象，同时也避免了酸碱蚀刻带来的环境污染问题。优选的，在本发明的一些实施例中，对导电层可视区21采用激光蚀刻。In the present invention, silver nanowires are used as the conductive layer 2, only the visible area 21 of the conductive layer needs to be etched, and the conductive silver paste printed in the binding area 22 does not need to be etched, which avoids the occurrence of destructive particles during the etching process. The conductive layer of the silver nanowire in the viewing zone 21 causes damage, and at the same time avoids environmental pollution caused by acid-base etching. Preferably, in some embodiments of the present invention, laser etching is used for the visible area 21 of the conductive layer.
在本发明的一些实施例中，导电银浆网版印刷、喷涂、打印或转印在银纳米线导电层2上。印刷后的导电银浆经烘干固化或UV(ultraviolet)固化成型。In some embodiments of the present invention, conductive silver paste is screen printed, sprayed, printed or transferred on the conductive layer 2 of silver nanowires. The printed conductive silver paste is cured by drying or UV (ultraviolet) curing.
在本发明的一些实施例中，连接线路4和挠性线路板5通过异方性导电膜、异方性导电胶或银浆粘合导通。在本发明的一些实施例中，异方性导电膜、异方性导电胶或银浆作为导电介质，贴覆在挠性线路板5上，再采用热压机对连接线路4和挠性线路板5进行压合绑定，实现定向导通。本发明通过绑定区印刷导电银浆，导电银浆无需进行蚀刻，降低了挠性线路板5与导电银浆绑定时的对位难度，方便热压贴合，且可提高挠性线路板5的导通效率。In some embodiments of the present invention, the connecting circuit 4 and the flexible circuit board 5 are connected through an anisotropic conductive film, an anisotropic conductive adhesive or silver paste. In some embodiments of the present invention, anisotropic conductive film, anisotropic conductive glue or silver paste is used as a conductive medium to be pasted on the flexible circuit board 5, and then a hot press is used to connect the connecting circuit 4 and the flexible circuit The board 5 is press-fitted and bound to realize the fixed-directional communication. In the present invention, conductive silver paste is printed through the binding area, the conductive silver paste does not need to be etched, the alignment difficulty of the flexible circuit board 5 and the conductive silver paste is reduced, the hot pressing is convenient, and the flexible circuit board can be improved The conduction efficiency of 5.
在本发明的一些实施例中，导电层2边缘的引出线用挠性电路板5链接和触控芯片相连。导电层可视区21上通过蚀刻得到的多条感应电路通过引出线与挠性电路板5电连接，通过印刷导电银浆，增加引出线与感应电路的接触点，减少断路概率，同时对绑定区22的银纳米线起到良好的保护作用，进而提高产品的良率。In some embodiments of the present invention, the lead wires at the edge of the conductive layer 2 are connected to the touch chip by a flexible circuit board 5 link. The multiple sensing circuits obtained by etching on the visible area 21 of the conductive layer are electrically connected to the flexible circuit board 5 through lead wires. By printing conductive silver paste, the contact points between the lead wires and the sensing circuit are increased, and the probability of disconnection is reduced. The silver nanowires in the fixed area 22 play a good protective role, thereby improving the yield of the product.
现有技术中，多为在导电层边框印刷一圈导电银浆，来实现走线，但该方式只能单层走线，而对于大尺寸触摸屏由于通常通道数多，无法实现窄边框设计。本发明的电容式触摸屏的走线通过挠性电路板FPC实现，而非印刷的导电银浆实现，故可通过多层板的形式实现触摸屏的超窄边框。In the prior art, a circle of conductive silver paste is printed on the border of the conductive layer to realize wiring, but this method can only be used for single-layer wiring. However, for large-size touch screens, a narrow bezel design cannot be realized due to the large number of channels. The wiring of the capacitive touch screen of the present invention is realized by flexible circuit board FPC instead of printed conductive silver paste, so the ultra-narrow frame of the touch screen can be realized in the form of a multilayer board.
具体的，本发明的电容式触摸屏的技术方案还适用于导电层为银纳米颗粒导电浆料、铜纳米线导电浆料、铜纳米颗粒导电浆料、金纳米线导电浆料、金纳米颗粒导电浆料、镍纳米线导电浆料、镍纳米颗粒导电浆料中任意一种或几种混合涂布固化而成的导电层。Specifically, the technical solution of the capacitive touch screen of the present invention is also suitable for conductive layers of silver nano-particle conductive paste, copper nano-wire conductive paste, copper nano-particle conductive paste, gold nano-wire conductive paste, and gold nano-particle conductive paste. A conductive layer formed by mixing any one or more of the paste, nickel nanowire conductive paste, and nickel nanoparticle conductive paste.
具体的，连接线路4的图案可以为多种形式，本发明不做具体限定，以不影响可视区外观和方便绑定为原则选取。Specifically, the pattern of the connecting line 4 may be in various forms, and the present invention does not make specific limitations, and is selected on the principle of not affecting the appearance of the visible area and facilitating binding.
具体的，在本发明的一些实施例中，连接线路4包括第一横条6、第二横条7和第一竖条、第二竖条、……、第n竖条；第一竖条、第二竖条、……、第n竖条相互平行并位于第一横条6和第二横条7之间，与第一横条6和第二横条7连接；第一横条6与挠性线路板5连接，第二横条7与可视区21的边缘连接。Specifically, in some embodiments of the present invention, the connecting line 4 includes a first horizontal bar 6, a second horizontal bar 7, and a first vertical bar, a second vertical bar, ..., the nth vertical bar; the first vertical bar , The second vertical bar..., the nth vertical bar are parallel to each other and located between the first horizontal bar 6 and the second horizontal bar 7, and are connected to the first horizontal bar 6 and the second horizontal bar 7; the first horizontal bar 6 It is connected to the flexible circuit board 5, and the second horizontal bar 7 is connected to the edge of the viewing area 21.
更具体的，第一横条6和第二横条7的长度S1为0.1-8mm；第一竖条8、第二竖条9、……、第n竖条的长度S2相等，均为(0.1-8/n)mm，第一竖条8、第二竖条9、……、第n竖条的长度总和小于第一横条6和第二横条7的长度，1≤n≤10，n为整数；第一横条6的宽度h1和第二横条7的宽度h2为0.1-2mm，第一竖条8、第二竖条9、……、第n竖条的宽度d为1-10mm。More specifically, the length S1 of the first horizontal bar 6 and the second horizontal bar 7 is 0.1-8mm; the length S2 of the first vertical bar 8, the second vertical bar 9, ..., the n-th vertical bar are equal, both ( 0.1-8/n)mm, the total length of the first vertical bar 8, the second vertical bar 9,..., the n-th vertical bar is less than the length of the first horizontal bar 6 and the second horizontal bar 7, 1≤n≤10 , N is an integer; the width h1 of the first horizontal bar 6 and the width h2 of the second horizontal bar 7 are 0.1-2mm, and the width d of the first vertical bar 8, the second vertical bar 9, ..., the n-th vertical bar is 1-10mm.
如图2和图3所示，作为本发明的第一种实施例，连接线路4为“工”字型结构，连接线路4包括第一横条6、第二横条7和第一竖条8，第一竖条8连接第一横条6和第二横条7，第一横条6与挠性线路板5连接，第二横条7与可视区21的边缘连接。As shown in Figures 2 and 3, as the first embodiment of the present invention, the connecting line 4 has an I-shaped structure, and the connecting line 4 includes a first horizontal bar 6, a second horizontal bar 7, and a first vertical bar. 8. The first vertical bar 8 connects the first horizontal bar 6 and the second horizontal bar 7, the first horizontal bar 6 is connected to the flexible circuit board 5, and the second horizontal bar 7 is connected to the edge of the viewing area 21.
更具体的，第一横条6和第二横条7的长度S1为0.1-8mm，第一竖条8的长度S2为0.1-8mm，第一横条6和第二横条7的长度S1大于第一竖条8的长度S2；第一横条6的宽度h1和第二横条7的宽度h2为0.1-2mm，第一竖条8的宽度d为1-10mm。在本发明的第一种实施例中，如图3所示，第一横条6和第二横条7的长度S1为5mm，第一竖条8的长度S2为1.5mm；第一横条6的宽度h1为2mm，第二横条7的宽度h2为1.5mm，第一竖条8的宽度d为3mm。More specifically, the length S1 of the first horizontal bar 6 and the second horizontal bar 7 is 0.1-8 mm, the length S2 of the first vertical bar 8 is 0.1-8 mm, and the length S1 of the first horizontal bar 6 and the second horizontal bar 7 It is greater than the length S2 of the first vertical bar 8; the width h1 of the first horizontal bar 6 and the width h2 of the second horizontal bar 7 are 0.1-2 mm, and the width d of the first vertical bar 8 is 1-10 mm. In the first embodiment of the present invention, as shown in FIG. 3, the length S1 of the first horizontal bar 6 and the second horizontal bar 7 is 5mm, and the length S2 of the first vertical bar 8 is 1.5mm; The width h1 of 6 is 2 mm, the width h2 of the second horizontal bar 7 is 1.5 mm, and the width d of the first vertical bar 8 is 3 mm.
如图4和图5所示，作为本发明的第二种实施例，连接路线为类“Ⅲ”字型结构，连接线路包括第一横条6、第二横条7和第一竖条8、第二竖条9和第三竖条10；第一竖条8、第二竖条9、第三竖条10相互平行并位于第一横条6和第二横条7之间，与第一横条6和第二横条7连接；第一横条6与挠性线路板5连接，第二横条7与可视区21的边缘连接。As shown in Figures 4 and 5, as a second embodiment of the present invention, the connection route is a "Ⅲ"-like structure, and the connection route includes a first horizontal bar 6, a second horizontal bar 7, and a first vertical bar 8. , The second vertical bar 9 and the third vertical bar 10; the first vertical bar 8, the second vertical bar 9, the third vertical bar 10 are parallel to each other and located between the first horizontal bar 6 and the second horizontal bar 7, and A horizontal bar 6 is connected with the second horizontal bar 7; the first horizontal bar 6 is connected with the flexible circuit board 5, and the second horizontal bar 7 is connected with the edge of the viewing area 21.
如图5所示，在本发明的第二种实施例中，第一横条6和第二横条7的长度S1为8mm；第一竖条8、第二竖条9、第三竖条10的长度S2相等，均为2mm；第一横条6的宽度h1为2mm，第二横条7的宽度h2为2mm，第一竖条8、第 二竖条9、第三竖条10的宽度d为3mm。As shown in Figure 5, in the second embodiment of the present invention, the length S1 of the first horizontal bar 6 and the second horizontal bar 7 is 8mm; the first vertical bar 8, the second vertical bar 9, and the third vertical bar The length S2 of 10 is equal, both are 2mm; the width h1 of the first horizontal bar 6 is 2mm, the width h2 of the second horizontal bar 7 is 2mm, the first vertical bar 8, the second vertical bar 9, and the third vertical bar 10 The width d is 3mm.
如图6所示，作为本发明的第三种实施例，连接线路包括第一横条、第二横条和第一竖条、第二竖条、第三竖条、第四竖条和第五竖条；第一竖条、第二竖条、第三竖条、第四竖条和第五竖条相互平行并位于第一横条和第二横条之间，与第一横条和第二横条连接；第一横条与挠性线路板连接，第二横条与可视区的边缘连接。其中，第一横条和第二横条的长度为6mm；第一竖条、第二竖条、第三竖条、第四竖条、第五竖条的长度相等，均为1mm；第一横条的宽度为1.8mm，第二横条的宽度为1.2mm，第一竖条、第二竖条、第三竖条、第四竖条、第五竖条的宽度为5mm。As shown in FIG. 6, as a third embodiment of the present invention, the connection line includes a first horizontal bar, a second horizontal bar and a first vertical bar, a second vertical bar, a third vertical bar, a fourth vertical bar and a first vertical bar. Five vertical bars; the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar and the fifth vertical bar are parallel to each other and are located between the first horizontal bar and the second horizontal bar, and the first horizontal bar and The second horizontal bar is connected; the first horizontal bar is connected with the flexible circuit board, and the second horizontal bar is connected with the edge of the visible area. Among them, the length of the first horizontal bar and the second horizontal bar is 6mm; the lengths of the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, and the fifth vertical bar are equal, and they are all 1mm; The width of the horizontal bar is 1.8 mm, the width of the second horizontal bar is 1.2 mm, and the width of the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, and the fifth vertical bar are 5 mm.
如图7所示，作为本发明的第四种实施例，连接线路包括第一横条、第二横条和第一竖条、第二竖条、第三竖条、第四竖条、第五竖条、第六竖条和第七竖条；第一竖条、第二竖条、第三竖条、第四竖条、第五竖条、第六竖条和第七竖条相互平行并位于第一横条和第二横条之间，与第一横条和第二横条连接；第一横条与挠性线路板连接，第二横条与可视区的边缘连接。其中，第一横条和第二横条的长度为7mm；第一竖条、第二竖条、第三竖条、第四竖条、第五竖条、第六竖条和第七竖条的长度相等，均为0.8mm；第一横条的宽度为0.9mm，第二横条的宽度为0.8mm，第一竖条、第二竖条、第三竖条、第四竖条、第五竖条、第六竖条和第七竖条的宽度为6mm。As shown in FIG. 7, as a fourth embodiment of the present invention, the connection line includes a first horizontal bar, a second horizontal bar, a first vertical bar, a second vertical bar, a third vertical bar, a fourth vertical bar, and a first vertical bar. Five vertical bars, sixth vertical bars and seventh vertical bars; the first vertical bar, second vertical bar, third vertical bar, fourth vertical bar, fifth vertical bar, sixth vertical bar and seventh vertical bar are parallel to each other It is located between the first horizontal bar and the second horizontal bar, and is connected with the first horizontal bar and the second horizontal bar; the first horizontal bar is connected with the flexible circuit board, and the second horizontal bar is connected with the edge of the visible area. Among them, the length of the first horizontal bar and the second horizontal bar is 7mm; the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, the fifth vertical bar, the sixth vertical bar and the seventh vertical bar Are equal in length, 0.8mm; the width of the first horizontal bar is 0.9mm, the width of the second horizontal bar is 0.8mm, the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, and the The width of the five vertical bars, the sixth vertical bar and the seventh vertical bar is 6mm.
如图8所示，作为本发明的第五种实施例，连接线路包括第一横条、第二横条和第一竖条、第二竖条、第三竖条、第四竖条、第五竖条、第六竖条、第七竖条、第八竖条、第九竖条和第十竖条；第一竖条、第二竖条、第三竖条、第四竖条、第五竖条、第六竖条、第七竖条、第八竖条、第九竖条和第十竖条相互平行并位于第一横条和第二横条之间，与第一横条和第二横条连接；第一横条与挠性线路板连接，第二横条与可视区的边缘连接。其中，第一横条和第二横条的长度为4mm；第一竖条、第二竖条、第三竖条、第四竖条、第五竖条、第六竖条、第七竖条、第八竖条、第九竖条和第十竖条的长度相等，均为0.2mm；第一横条的宽度为0.4mm，第二横条的宽度为0.4mm，第一竖条、第二竖条、第三竖条、第四竖条、第五竖条、第六竖条、第七竖条、第八竖条、第九竖条和第十竖条的宽度为3mm。As shown in FIG. 8, as a fifth embodiment of the present invention, the connection line includes a first horizontal bar, a second horizontal bar, a first vertical bar, a second vertical bar, a third vertical bar, a fourth vertical bar, and a first vertical bar. Five vertical bars, sixth vertical bars, seventh vertical bars, eighth vertical bars, ninth vertical bars, and tenth vertical bars; the first vertical bars, the second vertical bars, the third vertical bars, the fourth vertical bars, and the first vertical bar. The five vertical bars, the sixth vertical bar, the seventh vertical bar, the eighth vertical bar, the ninth vertical bar and the tenth vertical bar are parallel to each other and are located between the first horizontal bar and the second horizontal bar. The second horizontal bar is connected; the first horizontal bar is connected with the flexible circuit board, and the second horizontal bar is connected with the edge of the visible area. Among them, the length of the first horizontal bar and the second horizontal bar is 4mm; the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, the fifth vertical bar, the sixth vertical bar, and the seventh vertical bar , The eighth, ninth and tenth vertical bars are equal in length, 0.2mm; the first horizontal bar has a width of 0.4mm, and the second horizontal bar has a width of 0.4mm. The width of the second vertical bar, the third vertical bar, the fourth vertical bar, the fifth vertical bar, the sixth vertical bar, the seventh vertical bar, the eighth vertical bar, the ninth vertical bar and the tenth vertical bar are 3mm.
具体的，在本发明的一些实施例中，连接线路4包括第一横条6和第一竖条8、第二竖条9、……、第n竖条；第一竖条8、第二竖条9、……、第n竖条相互平行并一端与第一横条6连接，第一横条6与挠性线路板5连接，第一竖条8、第二竖条9、……、第n竖条的另一端与可视区21的边缘连接。如图9和图10所示，作为本发明的第六种实施例，连接路线为类似倒“山”字型结构，连接线路包括第一横条6和第一竖条8、第二竖条9、第三竖条10；第一竖条8、第二竖条9、第三竖条10相互平行并一端与第一横条6连接，第一横条6与挠性线路板5连接，第一竖条8、第二竖条9、第三竖条10的另一端与可视区21的边缘连接。Specifically, in some embodiments of the present invention, the connecting line 4 includes a first horizontal bar 6 and a first vertical bar 8, a second vertical bar 9, ..., an nth vertical bar; the first vertical bar 8, the second vertical bar The vertical bars 9,..., the nth vertical bar are parallel to each other and one end is connected to the first horizontal bar 6, the first horizontal bar 6 is connected to the flexible circuit board 5, the first vertical bar 8, the second vertical bar 9, ... , The other end of the nth vertical bar is connected to the edge of the viewing area 21. As shown in Figures 9 and 10, as the sixth embodiment of the present invention, the connecting route is similar to an inverted "mountain"-shaped structure, and the connecting route includes a first horizontal bar 6, a first vertical bar 8, and a second vertical bar. 9. The third vertical bar 10; the first vertical bar 8, the second vertical bar 9, and the third vertical bar 10 are parallel to each other and one end is connected to the first horizontal bar 6, and the first horizontal bar 6 is connected to the flexible circuit board 5. The other ends of the first vertical bar 8, the second vertical bar 9, and the third vertical bar 10 are connected to the edge of the viewing area 21.
更具体的，第一横条6的长度S1为0.1-8mm；第一竖条8、第二竖条9、……、第n竖条的长度S2相等，均为(0.1-8/n)mm，第一竖条8、第二竖条9、……、第n竖条的长度总和小于第一横条6的长度，1≤n≤10，n为整数；第一横条6的宽度h为0.1-2mm，第一竖条8、第二竖条9、……、第n竖条的宽度d为1-10mm。如图10所示，作为本发明的第六种实施例，第一横条6的长度S1为3mm；第一竖条8、第二竖条9、第三竖条10的长度S2相等，均为0.5mm；第一横条6的宽度h为1.2mm，第一竖条8、第二竖条9、第三竖条10的宽度d为2mm。More specifically, the length S1 of the first horizontal bar 6 is 0.1-8mm; the lengths S2 of the first vertical bar 8, the second vertical bar 9, ..., the n-th vertical bar are equal, all (0.1-8/n) mm, the total length of the first vertical bar 8, the second vertical bar 9, ..., the n-th vertical bar is less than the length of the first horizontal bar 6, 1≤n≤10, n is an integer; the width of the first horizontal bar 6 h is 0.1-2mm, and the width d of the first vertical bar 8, the second vertical bar 9, ..., the n-th vertical bar is 1-10mm. As shown in FIG. 10, as a sixth embodiment of the present invention, the length S1 of the first horizontal bar 6 is 3mm; the length S2 of the first vertical bar 8, the second vertical bar 9, and the third vertical bar 10 are equal, all The width h of the first horizontal bar 6 is 1.2 mm, and the width d of the first vertical bar 8, the second vertical bar 9, and the third vertical bar 10 is 2 mm.
如图11所示，作为本发明的第七种实施例，连接路线包括第一横条和第一竖条，第一竖条一端与第一横条连接，第一横条与挠性线路板连接，第一竖条的另一端与可视区的边缘连接。其中，第一横条的长度为8mm，第一竖条的长度为2mm；第一横条的宽度为1.8mm，第一竖条的宽度为10mm。As shown in FIG. 11, as a seventh embodiment of the present invention, the connection route includes a first horizontal bar and a first vertical bar, one end of the first vertical bar is connected to the first horizontal bar, and the first horizontal bar is connected to the flexible circuit board. Connect, the other end of the first vertical bar is connected with the edge of the viewing area. Wherein, the length of the first horizontal bar is 8 mm, the length of the first vertical bar is 2 mm; the width of the first horizontal bar is 1.8 mm, and the width of the first vertical bar is 10 mm.
如图12所示，作为本发明的第八种实施例，连接线路包括第一横条和第一竖条、第二竖条、第三竖条、第四竖条和第五竖条；第一竖条、第二竖条、第三竖条、第四竖条和第五竖条相互平行并一端与第一横条连接，第一横条与挠性线路板连接，第一竖条、第二竖条、第三竖条、第四竖条和第五竖条的另一端与可视区的边缘连接。其中，第一横条的长度为1mm；第一竖条、第二竖条、第三竖条、第四竖条、第五竖条的长度相等，均为0.1mm；第一横条的宽度为0.2mm，第一竖条、第二竖条、第三竖条、第四竖条、第五竖条的宽度为1mm。As shown in FIG. 12, as an eighth embodiment of the present invention, the connection line includes a first horizontal bar and a first vertical bar, a second vertical bar, a third vertical bar, a fourth vertical bar, and a fifth vertical bar; One vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, and the fifth vertical bar are parallel to each other and one end is connected with the first horizontal bar, the first horizontal bar is connected with the flexible circuit board, the first vertical bar, The other ends of the second vertical bar, the third vertical bar, the fourth vertical bar, and the fifth vertical bar are connected to the edge of the visible area. Among them, the length of the first horizontal bar is 1mm; the lengths of the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, and the fifth vertical bar are all equal to 0.1mm; the width of the first horizontal bar The width of the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, and the fifth vertical bar are 1mm.
如图13所示，作为本发明的第九种实施例，连接线路包括第一横条和第一竖条、第二竖条、第三竖条、第四竖条、第五竖条、第六竖条和第七竖条；第 一竖条、第二竖条、第三竖条、第四竖条、第五竖条、第六竖条和第七竖条相互平行并一端与第一横条连接，第一横条与挠性线路板连接，第一竖条、第二竖条、第三竖条、第四竖条、第五竖条、第六竖条和第七竖条的另一端与可视区的边缘连接。其中，第一横条的长度为7mm；第一竖条、第二竖条、第三竖条、第四竖条、第五竖条、第六竖条和第七竖条的长度相等，均为0.8mm；第一横条的宽度为0.9mm，第一竖条、第二竖条、第三竖条、第四竖条、第五竖条、第六竖条和第七竖条的宽度为6mm。As shown in FIG. 13, as a ninth embodiment of the present invention, the connection line includes a first horizontal bar and a first vertical bar, a second vertical bar, a third vertical bar, a fourth vertical bar, a fifth vertical bar, and a first vertical bar. Six vertical bars and seventh vertical bars; the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, the fifth vertical bar, the sixth vertical bar, and the seventh vertical bar are parallel to each other and one end is connected to the first vertical bar. Horizontal bar connection, the first horizontal bar is connected to the flexible circuit board, the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, the fifth vertical bar, the sixth vertical bar and the seventh vertical bar The other end is connected to the edge of the viewing area. Among them, the length of the first horizontal bar is 7mm; the lengths of the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, the fifth vertical bar, the sixth vertical bar, and the seventh vertical bar are equal, all 0.8mm; the width of the first horizontal bar is 0.9mm, the width of the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, the fifth vertical bar, the sixth vertical bar and the seventh vertical bar It is 6mm.
如图14所示，作为本发明的第十种实施例，连接线路包括第一横条和第一竖条、第二竖条、第三竖条、第四竖条、第五竖条、第六竖条、第七竖条、第八竖条、第九竖条和第十竖条；第一竖条、第二竖条、第三竖条、第四竖条、第五竖条、第六竖条、第七竖条、第八竖条、第九竖条和第十竖条相互平行并一端与第一横条连接，第一横条与挠性线路板连接，第一竖条、第二竖条、第三竖条、第四竖条、第五竖条、第六竖条、第七竖条、第八竖条、第九竖条和第十竖条的另一端与可视区的边缘连接。其中，第一横条的长度为4mm；第一竖条、第二竖条、第三竖条、第四竖条、第五竖条、第六竖条、第七竖条、第八竖条、第九竖条和第十竖条的长度相等，均为0.2mm；第一横条的宽度为0.4mm，第一竖条、第二竖条、第三竖条、第四竖条、第五竖条、第六竖条、第七竖条、第八竖条、第九竖条和第十竖条的宽度为3mm。As shown in FIG. 14, as a tenth embodiment of the present invention, the connection line includes a first horizontal bar and a first vertical bar, a second vertical bar, a third vertical bar, a fourth vertical bar, a fifth vertical bar, and a first vertical bar. Six vertical bars, seventh vertical bars, eighth vertical bars, ninth vertical bars, and tenth vertical bars; the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, the fifth vertical bar, and the The six vertical bars, the seventh vertical bar, the eighth vertical bar, the ninth vertical bar and the tenth vertical bar are parallel to each other and one end is connected to the first horizontal bar, the first horizontal bar is connected to the flexible circuit board, the first vertical bar, The other end of the second vertical bar, the third vertical bar, the fourth vertical bar, the fifth vertical bar, the sixth vertical bar, the seventh vertical bar, the eighth vertical bar, the ninth vertical bar and the tenth vertical bar and the visible The edge of the area is connected. Among them, the length of the first horizontal bar is 4mm; the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, the fifth vertical bar, the sixth vertical bar, the seventh vertical bar, and the eighth vertical bar , The length of the ninth vertical bar and the tenth vertical bar are equal, both are 0.2mm; the width of the first horizontal bar is 0.4mm, the first vertical bar, the second vertical bar, the third vertical bar, the fourth vertical bar, and the The widths of the five vertical bars, the sixth vertical bars, the seventh vertical bars, the eighth vertical bars, the ninth vertical bars and the tenth vertical bars are 3mm.
本发明通过印刷不同形状或大小的导电银浆，实现了导电层和挠性线路板的定向导通，同时节省了导电银浆的用量，降低了触摸屏的制备成本；并实现了对绑定区银纳米线的保护。优选的，连接线路为“工”字型、“Ⅲ”字型或倒“山”字型的形状，即n为1或3，此时既能达到导通和保护的效果，又能最大程度的节约成本，且印刷工艺更加简单，简化制备工艺。By printing conductive silver pastes of different shapes or sizes, the present invention realizes the directional conduction of the conductive layer and the flexible circuit board, saves the amount of conductive silver paste, reduces the manufacturing cost of the touch screen, and realizes the binding area Protection of silver nanowires. Preferably, the connecting line is in the shape of "I", "Ⅲ" or inverted "Mountain" shape, that is, n is 1 or 3. At this time, both the conduction and protection effect can be achieved, and the maximum degree The cost is saved, the printing process is simpler, and the preparation process is simplified.
本发明的电容式触摸屏，以银纳米线作为导电层，通过在导电层绑定区印刷导电银浆，实现导电层与挠性线路板的连接，避免了因挠性线路板与导电层直接绑定而产生的损坏银纳米线的现象；不需要对印刷的银浆进行蚀刻，避免产生破坏性的颗粒或者酸碱蚀刻带来的环境污染问题。通过印刷导电银浆，还可实现对从绑定区到可视区的银纳米线的保护。同时也可方便与挠性线路板进行热压贴合，减少了挠性线路板绑定时的对位难度，提高了挠性线路板的导通 效率。In the capacitive touch screen of the present invention, silver nanowires are used as the conductive layer, and the conductive silver paste is printed in the conductive layer binding area to realize the connection between the conductive layer and the flexible circuit board, avoiding direct binding between the flexible circuit board and the conductive layer. The phenomenon of damage to the silver nanowires caused by certain circumstances; there is no need to etch the printed silver paste to avoid the production of destructive particles or environmental pollution caused by acid-base etching. By printing conductive silver paste, the protection of the silver nanowires from the binding area to the visible area can also be achieved. At the same time, it can also facilitate the hot pressing and bonding with the flexible circuit board, which reduces the difficulty of alignment when the flexible circuit board is bound, and improves the conduction efficiency of the flexible circuit board.
本发明还提供一种终端设备，该终端设备包括上述电容式触摸屏。具体的，该终端设备为手机、电脑、电视等，尤其为大尺寸电视、教学仪器等终端设备。The present invention also provides a terminal device, which includes the above-mentioned capacitive touch screen. Specifically, the terminal devices are mobile phones, computers, TVs, etc., especially terminal devices such as large-size TVs and teaching instruments.
以上借助具体实施例对本发明做了进一步描述，但是应该理解的是，这里具体的描述，不应理解为对本发明的实质和范围的限定，本领域内的普通技术人员在阅读本说明书后对上述实施例做出的各种修改，都属于本发明所保护的范围。The present invention has been further described with the help of specific embodiments above, but it should be understood that the specific description here should not be construed as limiting the essence and scope of the present invention. Those of ordinary skill in the art will comment on the above after reading this specification. Various modifications made to the embodiments belong to the protection scope of the present invention.

Claims (11)

  1. 一种电容式触摸屏，其特征在于，包括基材和涂布在所述基材上的银纳米线导电层，所述银纳米线导电层包括可视区和绑定区，所述可视区上复合有OCA光学胶，其中：所述可视区的内边缘到绑定区印刷有连接线路，通过所述连接线路将所述银纳米线导电层与挠性线路板连接。A capacitive touch screen, characterized in that it comprises a substrate and a silver nanowire conductive layer coated on the substrate, the silver nanowire conductive layer includes a visible area and a binding area, the visible area OCA optical glue is compounded on the upper surface, wherein: connecting lines are printed from the inner edge of the visible area to the binding area, and the silver nanowire conductive layer is connected to the flexible circuit board through the connecting lines.
  2. 根据权利要求1所述的电容式触摸屏，其特征在于，所述连接线路为印刷在银纳米线导电层上的导电银浆。The capacitive touch screen of claim 1, wherein the connecting circuit is a conductive silver paste printed on a conductive layer of silver nanowires.
  3. 根据权利要求1或2所述的电容式触摸屏，其特征在于，所述导电银浆网版印刷、喷涂、打印或转印在所述银纳米线导电层上。The capacitive touch screen according to claim 1 or 2, wherein the conductive silver paste is screen printed, sprayed, printed or transferred on the silver nanowire conductive layer.
  4. 根据权利要求1-3任一项所述的电容式触摸屏，其特征在于，所述基材为PET、COP、TAC、PVC、PI、PE中的任意一种。The capacitive touch screen according to any one of claims 1 to 3, wherein the substrate is any one of PET, COP, TAC, PVC, PI, and PE.
  5. 根据权利要求1-4任一项所述的电容式触摸屏，其特征在于，所述连接线路和挠性线路板通过异方性导电膜、异方性导电胶或银浆粘合导通。The capacitive touch screen according to any one of claims 1 to 4, wherein the connecting circuit and the flexible circuit board are connected through an anisotropic conductive film, an anisotropic conductive adhesive or silver paste.
  6. 根据权利要求1-5任一项所述的电容式触摸屏，其特征在于，所述连接线路包括第一横条、第二横条和第一竖条、第二竖条、……、第n竖条；所述第一竖条、第二竖条、……、第n竖条相互平行并位于所述第一横条和第二横条之间，与所述第一横条和第二横条连接；所述第一横条与所述挠性线路板连接，所述第二横条与所述可视区的边缘连接。The capacitive touch screen according to any one of claims 1 to 5, wherein the connection line comprises a first horizontal bar, a second horizontal bar, a first vertical bar, a second vertical bar, ... Vertical bar; the first vertical bar, the second vertical bar, ..., the nth vertical bar are parallel to each other and located between the first horizontal bar and the second horizontal bar, and the first horizontal bar and the second horizontal bar The horizontal bar is connected; the first horizontal bar is connected with the flexible circuit board, and the second horizontal bar is connected with the edge of the viewing area.
  7. 根据权利要求6所述的电容式触摸屏，其特征在于，所述第一横条和第二横条的长度为0.1-8mm；所述第一竖条、第二竖条、……、第n竖条的长度相等，均为(0.1-8/n)mm，所述第一竖条、第二竖条、……、第n竖条的长度总和小于所述第一横条和所述第二横条的长度；所述第一横条和第二横条的宽度为0.1-2mm，所述第一竖条、第二竖条、……、第n竖条的宽度为1-10mm。The capacitive touch screen according to claim 6, wherein the length of the first horizontal bar and the second horizontal bar is 0.1-8mm; the first vertical bar, the second vertical bar, ..., the nth The lengths of the vertical bars are equal, all (0.1-8/n) mm, and the sum of the lengths of the first vertical bar, the second vertical bar, ..., the nth vertical bar is less than the first horizontal bar and the first vertical bar. The length of the two horizontal bars; the width of the first horizontal bar and the second horizontal bar are 0.1-2mm, and the width of the first vertical bar, the second vertical bar, ..., the n-th vertical bar is 1-10mm.
  8. 根据权利要求1-5任一项所述的电容式触摸屏，其特征在于，所述连接线路包括第一横条和第一竖条、第二竖条、……、第n竖条；所述第一竖条、第二竖条、……、第n竖条相互平行并一端与所述第一横条连接，所述第一横条与所述挠性线路板连接，所述第一竖条、第二竖条、……、第n竖条的另一端与所述可视区的边缘连接。The capacitive touch screen according to any one of claims 1 to 5, wherein the connection line comprises a first horizontal bar and a first vertical bar, a second vertical bar, ..., the nth vertical bar; The first vertical bar, the second vertical bar,..., the nth vertical bar are parallel to each other and one end is connected to the first horizontal bar, the first horizontal bar is connected to the flexible circuit board, and the first vertical bar is connected to the flexible circuit board. The other end of the bar, the second vertical bar, ..., the n-th vertical bar is connected to the edge of the viewing area.
  9. 根据权利要求8所述的电容式触摸屏，其特征在于，所述第一横条的长度 为0.1-8mm；所述第一竖条、第二竖条、……、第n竖条的长度相等，均为(0.1-8/n)mm，所述第一竖条、第二竖条、……、第n竖条的长度总和小于所述第一横条的长度；所述第一横条的宽度为0.1-2mm，所述第一竖条、第二竖条、……、第n竖条的宽度为1-10mm。The capacitive touch screen according to claim 8, wherein the length of the first horizontal bar is 0.1-8mm; the lengths of the first vertical bar, the second vertical bar, ..., the nth vertical bar are equal , All of which are (0.1-8/n) mm, the sum of the lengths of the first vertical bar, the second vertical bar, ..., the n-th vertical bar is less than the length of the first horizontal bar; The width of the first vertical bar, the second vertical bar, ..., the n-th vertical bar is 1-10mm.
  10. 根据权利要求6-9中任一项所述的电容式触摸屏，其特征在于，1≤n≤10，n为整数。The capacitive touch screen according to any one of claims 6-9, wherein 1≤n≤10, and n is an integer.
  11. 一种终端设备，其特征在于，包括权利要求1-10中任一项所述的电容式触摸屏。A terminal device, characterized by comprising the capacitive touch screen according to any one of claims 1-10.
PCT/CN2019/072968 2019-01-15 2019-01-24 Capacitive touch screen and terminal device WO2020147144A1 (en)

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