CN203720803U

CN203720803U - Touch screen

Info

Publication number: CN203720803U
Application number: CN201420003836.2U
Authority: CN
Inventors: 殷亮; 刁海丰; 孙利佳; 王竹; 赵豪
Original assignee: Nano New Energy Tangshan Co Ltd
Current assignee: Nano New Energy Tangshan Co Ltd
Priority date: 2014-01-02
Filing date: 2014-01-02
Publication date: 2014-07-16
Anticipated expiration: 2024-01-02

Abstract

The utility model discloses a touch screen. The touch screen comprises an isolation substrate, a public electrode layer, a first transparent substrate, a through hole layer, a second transparent substrate, an array electrode layer and a printed circuit layer which are arranged in a stacked mode in turn; the array electrode layer is formed by a plurality of array points or array blocks, wherein the array points or the array blocks are used for sensing touch points and are not in contact with each other; the through hole layer comprises a plurality of through holes which are uniformly distributed; a friction interface is formed between two surfaces which are adjacent to the upper surface and the lower surface of the through hole layer respectively through the plurality of through holes; the printed circuit layer comprises signal output leads which are corresponding to the array points or the array blocks respectively; the positioning on the touch points can be achieved through determination of the positions of the array points or the array blocks of array electrodes, wherein output electric signals are generated by the array points or the array blocks. According to the touch screen, a complex mathematical model which is required by the non-linear relation is avoided due to the positioning on the touch points, positioning signals can be generated without charging in advance, the accurate and simple effect is achieved, meanwhile the process is simple, and the manufacture is easy.

Description

Touch screen

Technical Field

The utility model relates to a display device technical field, in particular to touch-sensitive screen.

Background

The touch screen is an induction display device capable of receiving input signals of a touch head and the like, when a graphic button on the screen is touched, a touch feedback system on the screen can drive various connecting devices according to a pre-programmed program, a mechanical button panel can be replaced, and vivid video and audio effects can be produced by a liquid crystal display picture. As a latest computer input device, the touch screen is the simplest, convenient and natural man-machine interaction mode at present. The multimedia interactive device gives the multimedia a brand-new appearance and is a brand-new multimedia interactive device with great attractiveness.

Due to the characteristics, the application range of the touch screen is gradually enlarged, and the touch screen product of the push-out device is competitive no matter a mobile phone, a camera or a portable video player. All current touch screen products can work after charging the touch screen products in advance, wherein the resistance type touch screen can only judge one touch point when working, and if the touch points are more than two, accurate judgment can not be made. In addition, resistive touch screens have a short lifetime. The detection is realized through the concave deformation in the outer conductive die, so that the material has a fatigue limit, and meanwhile, the detection point can drift after long-term use, and the calibration is needed. Compared with a resistance-type touch screen, the capacitance-type touch screen can realize multi-point touch, is novel in operation and high in durability. However, the capacitive touch screen is susceptible to environment, and the positioning of the capacitive touch screen is unstable and even drifts due to changes of factors such as the humidity and the temperature of the environment. Theoretically, many linear relationships are actually nonlinear, for example, for a surface capacitive touch screen, the total current amount sucked by people with different weights or different finger wetting degrees is different, the change of the total current amount and the change of four partial current amounts are nonlinear relationships, a customized polar coordinate system of four corners adopted by the capacitive touch screen has no origin point on coordinates, a controller cannot detect and recover after drifting, and if the nonlinear relationship is eliminated, a complex mathematical model must be established for accurately positioning a touch point. The mutual capacitance type capacitive screen can eliminate the drift phenomenon to a certain extent, is slightly influenced by external conditions, but comprises a plurality of layers of electrodes and a substrate, and is complex in process due to patterning manufacturing of the plurality of layers of electrodes.

SUMMERY OF THE UTILITY MODEL

The invention aims to provide a touch screen aiming at the defects of the prior art, and the accurate positioning of a touch point can be realized without establishing a complex mathematical model; the positioning signal can be generated by self power without pre-charging; meanwhile, the process is simple and easy to manufacture.

The utility model provides a touch screen, include:

the isolation substrate, the common electrode layer, the first transparent substrate, the through hole layer, the second transparent substrate, the array electrode layer and the printed circuit layer are sequentially stacked; wherein,

the array electrode layer is composed of a plurality of array points or array blocks used for sensing touch points; the array points or the array blocks are not contacted with each other; the through hole layer is provided with a plurality of uniformly distributed through holes, and a friction interface is formed between two surfaces respectively adjacent to the upper surface and the lower surface of the through hole layer through the through holes; the printed circuit layer has a signal output conductor corresponding to each array point or array block.

Optionally, the common electrode layer is disposed on the first side surface of the first transparent substrate; the array electrode layer is arranged on the first side surface of the second transparent substrate; the printed circuit layer is disposed on the first side surface of the second transparent substrate.

Optionally, the signal output wires are led out from each array point or array block to the edge of the second transparent substrate and are gathered into a row to serve as the signal output end of the touch screen.

Optionally, a third transparent substrate is further disposed between the array electrode layer and the printed circuit layer; the printed circuit layer is disposed on the first side surface of the third transparent substrate.

Optionally, the printed circuit layer includes a plurality of electrode blocks for generating induced charges, the position and size of the electrode block correspond to the array point or the array block of the array electrode layer, and the signal output wires are led out from each electrode block to the edge of the third transparent substrate and are gathered into a row to serve as the signal output end of the touch screen.

Alternatively, the electrode block is formed by plasma etching an indium tin oxide layer formed on the first side surface of the third transparent substrate by a vacuum sputtering method.

Optionally, the third transparent substrate has via holes at edge positions thereof, each array point or array block further has a respective transparent conductive line, the signal output conductive lines on the printed circuit layer corresponding to each array point or array block are connected to the corresponding transparent conductive lines through the via holes, and the signal output conductive lines are gathered in a row at the edge position of the third transparent substrate to serve as the signal output end of the touch screen.

Optionally, the signal output conductor is a printed circuit.

Optionally, the second side surface of the first transparent substrate and/or the second transparent substrate is further provided with an intervening thin film layer.

Optionally, the isolation substrate is bonded with the common electrode layer through an optically transparent pressure-sensitive adhesive; the two surfaces forming the friction interface are bonded to the via layer by optically transparent pressure sensitive adhesive coated on the upper and lower surfaces of the via layer.

Optionally, the array electrode layer and a portion of the first side surface of the second transparent substrate where the array electrode is not disposed are bonded to the third transparent substrate by an optically transparent pressure-sensitive adhesive.

Optionally, at least one of the two surfaces forming the friction interface is provided with a micro-nano structure.

Alternatively, the intermediate thin film layer is a polydimethylsiloxane film, a polyvinylidene fluoride film or a fluorinated ethylene propylene copolymer film which is manufactured on a corresponding transparent substrate by using a roll brush and is treated by a plasma etching technique or a corona method.

Optionally, the via layer is a via structure of polyethylene terephthalate, polyethylene or polyvinyl chloride.

Optionally, the cross-sectional area of the through-hole is 1-100mm²The cross section is in the shape of a regular polygon, and the distance between the opposite sides of the adjacent through holes is 0.5-3 mm.

Optionally, the material of the first transparent substrate and/or the second transparent substrate and/or the third transparent substrate is polyethylene terephthalate, polyethylene or polyvinyl chloride.

Optionally, the common electrode layer is an indium tin oxide layer prepared on the first side surface of the first transparent substrate by a vacuum sputtering method; and a plurality of array points or array blocks of the array electrode layer are formed by plasma etching the indium tin oxide layer prepared on the first side surface of the second transparent substrate by a vacuum sputtering method.

The utility model provides a touch-sensitive screen through combining the friction generator technique, has realized the self-power of touch-sensitive screen, and the output signal that detects is the output signal of the array electrode who corresponds with the touch-control point position, compares with current electric capacity screen, is difficult for receiving the influence of factors such as humidity, temperature, weight, has avoided because the complicated mathematical model that the relation of nonlinearity need establish to the location of touch-control point, need not to charge in advance and can produce positioning signal. Meanwhile, the process is simple and easy to manufacture.

Drawings

Fig. 1 is a schematic structural diagram of a touch screen according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a touch screen according to another embodiment of the present invention;

fig. 3 shows a schematic structural diagram of a touch screen according to another embodiment of the present invention.

Detailed Description

The present invention will be described in detail with reference to the following embodiments in order to fully understand the objects, features and functions of the present invention, but the present invention is not limited thereto.

The utility model discloses combined the friction generator technique in the touch-sensitive screen preparation, realized the self-powered and accurate location of touch-sensitive screen. The following takes a common friction generator as an example to briefly describe the working principle of the friction generator:

a common friction generator comprises a first electrode layer, a first high polymer insulating layer, a second high polymer insulating layer and a second electrode layer which are sequentially stacked. Specifically, the first electrode layer is disposed on a first side surface of the first high molecular polymer insulating layer; the second electrode layer is arranged on the first side surface of the second high polymer insulating layer; the second side surface of the first high molecular polymer insulating layer is opposite to the second side surface of the second high molecular polymer insulating layer, a friction interface is formed between the first high molecular polymer insulating layer and the second high molecular polymer insulating layer, and the first electrode layer and the second electrode layer form a signal output end of the friction generator.

The working principle of the friction generator is as follows: when the friction generator is pressed, all layers of the friction generator are extruded, so that the second high polymer insulating layer and the first high polymer insulating layer in the friction generator are mutually rubbed to generate static charges, induced charges are generated between the first electrode layer and the second electrode layer, and a potential difference is generated. The first electrode layer and the second electrode layer are used as output ends of the friction generator to be communicated with an external circuit to generate electric signals. When the layers of the friction generator are restored to the original state, the internal potential formed between the first electrode layer and the second electrode layer disappears, and the balanced first electrode layer and the balanced second electrode layer generate reverse potential difference again. By repeating the rubbing and the recovery, a periodic alternating current pulse electric signal can be formed in the external circuit.

The friction generator with other structures, for example, an intervening layer is added between the first and second high polymer insulating layers to improve the friction efficiency, etc., and the working principle is similar.

Fig. 1 shows a schematic structural diagram of a touch screen provided by an embodiment of the present invention, as shown in fig. 1, the touch screen includes an isolation substrate 101, a common electrode layer 103, a first transparent substrate 104, a via layer 105, a second transparent substrate 106, an array electrode layer 107, and a printed circuit layer (not shown) stacked in sequence; the array electrode layer 107 is composed of a plurality of array points or array blocks serving as sensing touch points, and the array points or array blocks are not in contact with each other; the through hole layer 105 is provided with a plurality of uniformly distributed through holes, and a friction interface is formed between two surfaces respectively adjacent to the upper surface and the lower surface of the through hole layer 105 through the through holes; the printed circuit layer has a signal output conductor corresponding to each array point or array block. The signal output wires are led out from each array point or array block to the edge of the second transparent substrate 106 and are gathered into a column to be used as the signal output end of the touch screen.

The common electrode layer 103 is disposed on a first side surface of the first transparent substrate 104 (an upper surface of the first transparent substrate 104 in fig. 1); the array electrode layer 107 is disposed on a first side surface of the second transparent substrate 106 (a lower surface of the second transparent substrate 106 in fig. 1).

The material of the first transparent substrate 104 is polyethylene terephthalate (PET), Polyethylene (PE), or polyvinyl chloride (PVC), or other transparent high molecular polymers may be selected. The common electrode layer 103 is an Indium Tin Oxide (ITO) layer, and other transparent electrode materials, such as zinc oxide (ZnO), aluminum-doped zinc oxide (AZO), ATO or single-layer graphene, can be selected for use.

The ITO film can be prepared by a plurality of methods, and the utility model discloses in, adopt the method of vacuum sputtering to prepare the ITO film on the surface of PET transparent substrate.

The common electrode layer 103 is prepared on the upper surface of the first transparent substrate 104, and is bonded to the optically transparent release substrate 101 through the surface-coated optically transparent pressure-sensitive adhesive layer 102. The optically transparent isolation substrate 101 is used for protecting and encapsulating the common electrode layer 103 and other structures, and is typically a physically or chemically strengthened glass, such as sodium silicate glass. The glass surface can be coated with a film, so that the purposes of scratch resistance and fouling resistance are achieved.

Similarly to the first transparent substrate 104 and the common electrode layer 103, the second transparent substrate 106 is also made of polyethylene terephthalate (PET), Polyethylene (PE), polyvinyl chloride (PVC), or other transparent high molecular polymer; the array electrode layer 107 is a plurality of array dots or blocks formed of ITO or other transparent electrode material. The array electrode layer 107 can be prepared as follows: forming an ITO film on one side surface of the second transparent substrate by the same process for preparing the common electrode layer, such as a vacuum sputtering method, and then patterning the formed ITO film by a plasma etching method to form the array electrode layer. Of course, other methods may be used to pattern the transparent electrode material such as ITO, for example, wet etching or laser etching may be used, or a combination of these methods may be used.

The density and the shape of the ITO array electrode manufactured by the plasma etching method can refer to row and column electrodes in the existing mutual capacitance capacitive screen so as to achieve the same touch identification precision, for example, the ITO array electrode is a rectangle regularly arranged in the length and width directions or a rhombus with opposite vertexes, and each array point and each array block of the array electrode are independent and do not contact with each other.

A via layer 105 is also disposed between the first transparent substrate 104 and the second transparent substrate 106, and the lower surface of the first transparent substrate 104 and the upper surface of the second transparent substrate 106 are bonded to the via layer 105 by an optically transparent pressure-sensitive adhesive applied on the via layer 105. The via layer 105 functions to separate a friction space, and in the above-described touch screen structure, the via layer 105 is separated by a friction interface formed between the first transparent substrate 104 and the second transparent substrate 106, that is, a friction interface formed between two surfaces (two surfaces opposite to the first transparent substrate 104 and the second transparent substrate 106) adjacent to the upper and lower surfaces of the via layer 105, respectively, through a plurality of through holes. Carry out the bonding of friction interface through this via layer, the friction efficiency that the adhesive leads to when having avoided the direct bonding of friction interface reduces, and the setting of via layer also makes the location of touch-sensitive screen more accurate, stable. In the touch screen structure, when a user touches the screen, the first transparent substrate near the touch point deforms, the first transparent substrate is contacted with the second transparent substrate through the through hole layer, induction charges are generated in the array electrodes corresponding to the through hole positions, and when the touch screen is not touched, the friction interface cannot be contacted, so that the drift phenomenon which possibly occurs in use is avoided.

To achieve this, the via layer 105 is a via structure, and the vias on the via layer 105 are uniformly distributed. Optionally, the cross-sectional area of the through-hole is 1-100mm²The shape of the through hole is square, and the distance between each through hole and the opposite side of the adjacent through holes on the periphery is 0.5-3 mm. Of course, in practice, according to the requirement of different applications on the touch precision, the size, shape and distribution density of the array electrodes may be adjusted, and the size and shape of the through holes may also be adjusted accordingly, for example, the through holes may also be other polygons whose areas correspond to the squares. To array electrode and through holeThe distribution of the touch signal is adjusted to ensure that the user can generate signal reaction when touching any position of the touch screen meeting the touch precision requirement. The material of the via layer may be the same as the first and second transparent substrates, for example, polyethylene terephthalate (PET) or other transparent polymer materials such as Polyethylene (PE), polyvinyl chloride (PVC), etc.

A printed circuit layer, not shown in fig. 1, is provided on the lower surface of the second transparent substrate, which is used for positioning of the touch point. The printed circuit layer may first comprise signal output conductors connected to each array point or array block, which may be realized by: the transparent conducting wire (namely, a signal output conducting wire) connected with each array point or each array block is etched while the array electrode is manufactured by using a plasma etching method, and the transparent conducting wire can be made of an ITO material or other transparent electrode materials. The transparent conductive lines can also be formed after the array electrodes by other methods, for example, by using a printed circuit or electroplating. And the signal output conducting wires are led out from each array point or array block to the edge of the second transparent substrate and are gathered into a row to be used as a signal output end of the touch screen. The printed circuit layer on the second transparent substrate may also include necessary signal processing circuitry, for example, may include: a rectifier circuit, a signal amplifier circuit, etc.

Fig. 2 is a schematic structural diagram of a touch screen according to another embodiment of the present invention, as shown in fig. 2, the touch screen includes an isolation substrate 101, a common electrode layer 103, a first transparent substrate 104, a via layer 105, a second transparent substrate 106, an array electrode layer 107, a third transparent substrate 108, and a printed circuit layer 109, which are sequentially stacked; the array electrode layer 107 is composed of a plurality of array points or array blocks used for sensing touch points, and the array points or the array blocks are not in contact with each other; the via layer 105 has a plurality of vias uniformly distributed; the printed circuit layer 109 has signal output conductors corresponding to each array point or array block. The printed circuit layer 109 is provided on a first side surface of the third transparent substrate 108 (a lower surface of the third transparent substrate 108 in fig. 2).

Unlike fig. 1, the touch screen shown in fig. 2 further includes a third transparent substrate 108, and the third transparent substrate 108 is mainly used for printing a printed circuit layer. The surface of the third transparent substrate 108 on the side where the circuit is not printed is bonded to the second transparent substrate 106 and the array electrode 107 by an optically transparent pressure-sensitive adhesive. A printed circuit layer 109 printed on the third transparent substrate 108 is used for positioning of the touch points. The printed circuit layer 109 may first comprise signal output conductors connected to each array point or array block, which may be achieved by: the transparent conducting wire connected with each array point or array block is etched while the array electrode is manufactured by a plasma etching method, and the transparent conducting wire can be made of ITO materials and other transparent electrode materials. The transparent wires can also be formed by other methods after the array electrodes, for example, by electroplating. Then, via holes may be formed at the edges of the third transparent substrate and the optically transparent pressure-sensitive adhesive therebetween, and signal output wires corresponding to each array dot or array block are printed on the third transparent substrate 108, and connected to the corresponding transparent wires through the via holes, so that each array dot or array block has a signal output wire connected thereto, and the signal output wires are gathered in a row at the edge position of the third transparent substrate as a signal output terminal of the touch screen. Or, a plurality of electrode blocks are manufactured on the printed circuit layer without manufacturing through holes, the positions and the sizes of the electrode blocks correspond to the array points or the array blocks on the array electrode layer, when the touch points receive pressing, the array points or the surface of the array blocks at the corresponding positions generate induced charges, and the induced charges enable the electrode blocks on the printed circuit layer to also generate the induced charges. Then, a signal output wire corresponding to each electrode block is printed on the third transparent substrate for outputting an electrical signal. And the signal output wires are led out from each electrode block to the edge of the third transparent substrate and are gathered into a row to be used as a signal output end of the touch screen. The electrode block is formed by plasma etching the indium tin oxide layer prepared on the first side surface of the third transparent substrate by the vacuum sputtering method. The printed circuit layer on the third transparent substrate 108 may also include necessary signal processing circuitry, for example, may include: a rectifier circuit, a signal amplifier circuit, etc. The third transparent substrate is made of polyethylene terephthalate (PET), Polyethylene (PE) or polyvinyl chloride (PVC).

On the basis of the structures shown in fig. 1 and fig. 2, in order to improve the friction efficiency of the friction interface and further improve the power generation capability of the array electrode 107 and the common electrode 103, a micro-nano structure may be further disposed on two interfaces where the first transparent substrate 104 and the second transparent substrate 106 rub against each other. Therefore, when the touch screen is pressed, the first transparent substrate 104 and the second transparent substrate 106 can be better rubbed in contact, and more charges are induced at the common electrode 103 and the array electrode 107.

The micro-nano structure can be realized in two possible ways: in a first mode, the micro-nano structure is a micro-scale or nano-scale very small concave-convex structure. The concave-convex structure can increase the frictional resistance and improve the power generation efficiency. The concave-convex structure can be directly formed during the preparation of the film, and an irregular concave-convex structure can also be formed on the surface of the first transparent substrate by using a polishing method. Specifically, the concave-convex structure may be a concave-convex structure in a shape of a semicircle, a stripe, a cube, a quadrangular pyramid, a cylinder, or the like. The second mode is that the micro-nano structure is a nano-scale porous structure, and a plurality of nano holes are arranged on the surface of the first transparent substrate, which is opposite to the second transparent substrate. Wherein, the size of each nanopore, i.e. the width and the depth, can be selected according to the needs of the application, and the preferred size of the nanopore is as follows: the width is 10-100nm and the depth is 4-50 μm. The number of the nano-holes can be adjusted according to the required output current value and voltage value, and the nano-holes are preferably uniformly distributed with the hole spacing of 2-30 μm, and more preferably uniformly distributed with the average hole spacing of 9 μm.

According to the friction generator principle and the touch screen structure of the preceding description can learn the utility model provides a touch screen's theory of operation as follows: the first transparent substrate is equivalent to a first high polymer insulating layer in the friction generator, and the ITO common electrode layer prepared on the first transparent substrate is equivalent to a first electrode layer in the friction generator and plays a role in shielding external signals, such as eliminating electrostatic interference; similarly, the second transparent substrate and the array electrode layer correspond to the second high molecular polymer insulating layer and the second electrode layer, respectively. When a user touches the screen, the first transparent substrate and the second transparent substrate rub through the through hole layer, and due to the fact that the array points or the array blocks are not in contact with each other, induced charges are generated only in the array points or the array blocks corresponding to the touched positions and the common electrode layer, and electric signals are output outwards. In this way, the position of the touch screen can be determined directly, for example, by a plurality of encoding circuits and a common processor.

In the touch screens with the two structures, in order to simplify the process, the first transparent substrate 104 and the second transparent substrate 106 are generally made of transparent high molecular polymers made of the same material, and the electric quantity generated when friction interfaces made of the same material rub is small. Therefore, preferably, an intermediate thin film layer 110 may be further disposed between the first transparent substrate 104 and the second transparent substrate 106, as shown in fig. 3, the intermediate thin film layer 110 may be disposed on the second side surface of the first transparent substrate 104 (the lower surface of the first transparent substrate 104 in fig. 3), in which case the via layer 105 is disposed between the intermediate thin film layer 110 and the second transparent substrate 106, and a friction interface is formed between the intermediate thin film layer 110 and the second side surface of the second transparent substrate 106 (the upper surface of the second transparent substrate 106 in fig. 3) by a plurality of via holes; alternatively, an intervening thin film layer may be provided on the second side surface of the second transparent substrate 160 (the upper surface of the second transparent substrate 160 in fig. 3), in which case the via layer 105 is provided between the intervening thin film layer and the first transparent substrate 104, and a frictional interface is formed between the intervening thin film layer and the second side surface of the first transparent substrate 104 (the lower surface of the first transparent substrate 104) via a plurality of via holes. Similarly, at least one interface of the two interfaces which rub against each other is provided with a micro-nano structure. The arrangement of the micro-nano structure and the bonding of the friction interface and the via layer are the same as described above and will not be repeated here. The structure shown in fig. 3 is based on the structure of fig. 2 with the addition of an intervening thin film layer. Optionally, an intervening thin film layer may also be added to the structure of fig. 1.

The material of the intermediate thin film layer is selected from transparent high-molecular polymer insulating materials, and can be the same as or different from the first transparent substrate and the second transparent substrate. Preferably, the first transparent substrate is made of a different material than the intermediate thin film layer. The material of first transparent substrate and second transparent substrate is preferred the same, can reduce the material kind like this, makes the utility model discloses a preparation is more convenient.

In the touch panel having such a structure, the material of the intermediate film layer is preferably a polydimethylsiloxane film, polyvinylidene fluoride (PVDF), or fluorinated ethylene propylene copolymer (FEP). The first and second transparent substrates are made of polyethylene terephthalate, Polyethylene (PE) or polyvinyl chloride (PVC). Because the surface of the silicon-based film has stronger electrostatic adsorption capacity, the polydimethylsiloxane film can be further treated by using a plasma etching technology or a corona method so as to weaken the electrostatic adsorption capacity of the surface.

According to the utility model discloses above-mentioned embodiment provides a touch-sensitive screen, through selecting, making suitable material, when each layer mutual contact's transparent substrate and electrode layer and optional intermediate film layer formed the touch-sensitive screen structure, frictional layer and electrode layer in also having acted as the friction generator, the location to the touch-control point can be realized through confirming the array point that array electrode produced the output signal of telecommunication. Compared with the existing capacitive screen, the capacitive screen is not easily influenced by factors such as humidity, temperature, weight and the like, a complex mathematical model required to be established due to a nonlinear relation is avoided for positioning the touch points, and the capacitive screen is more accurate and simpler. Meanwhile, the process is simple and easy to manufacture.

It will be appreciated by those skilled in the art that the arrangement of devices shown in the figures or embodiments is merely schematic and representative of a logical arrangement. Where modules shown as separate components may or may not be physically separate, components shown as modules may or may not be physical modules.

It will be apparent to those skilled in the art that various changes and modifications may be made to the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A touch screen is characterized by comprising an isolation substrate, a common electrode layer, a first transparent substrate, a through hole layer, a second transparent substrate, an array electrode layer and a printed circuit layer which are sequentially stacked;

the array electrode layer is composed of a plurality of array points or array blocks used for sensing touch points, and the array points or the array blocks are not in contact with each other;

the through hole layer is provided with a plurality of uniformly distributed through holes, and a friction interface is formed between two surfaces respectively adjacent to the upper surface and the lower surface of the through hole layer through the through holes;

the printed circuit layer has a signal output lead corresponding to each array point or array block.

2. The touch screen of claim 1, wherein the common electrode layer is disposed on a first side surface of the first transparent substrate; the array electrode layer is arranged on the first side surface of the second transparent substrate; the printed circuit layer is disposed on the first side surface of the second transparent substrate.

3. The touch screen of claim 2, wherein the signal output wires are led out from each array point or array block to the edge of the second transparent substrate and are gathered into a column to serve as signal output terminals of the touch screen.

4. The touch screen of claim 1, wherein a third transparent substrate is further disposed between the array electrode layer and the printed circuit layer; the printed circuit layer is disposed on the first side surface of the third transparent substrate.

5. The touch screen of claim 4, wherein the printed circuit layer comprises a plurality of electrode blocks for generating induced charges, the electrode blocks are corresponding to the array points or array blocks of the array electrode layer in position and size, and the signal output wires are led out from each electrode block to the edge of the third transparent substrate and are gathered into a row to serve as the signal output end of the touch screen.

6. The touch screen of claim 5, wherein the electrode blocks are formed by plasma etching an indium tin oxide layer formed on the first side surface of the third transparent substrate by a vacuum sputtering method.

7. The touch screen of claim 4, wherein the third transparent substrate has a via at an edge position;

each array point or array block is also provided with a transparent conducting wire, the signal output conducting wire corresponding to each array point or array block on the printed circuit layer is connected with the corresponding transparent conducting wire through the through hole, and the signal output conducting wires are gathered into a column at the edge position of the third transparent substrate to be used as the signal output end of the touch screen.

8. A touch screen according to claim 3, 5 or 7, wherein the signal output conductors are printed circuits.

9. A touch screen according to any of claims 2 to 8, wherein the second side surface of the first and/or second transparent substrate is further provided with an intervening thin film layer.

10. The touch screen of any of claims 1-9, wherein the release substrate is bonded to the common electrode layer by an optically transparent pressure sensitive adhesive; the two surfaces forming the friction interface are bonded with the via layer by optically transparent pressure-sensitive adhesives coated on the upper and lower surfaces of the via layer.

11. The touch screen according to any one of claims 4 to 9, wherein the array electrode layer and the portion of the first side surface of the second transparent substrate on which the array electrode is not disposed are bonded to the third transparent substrate by an optically transparent pressure-sensitive adhesive.

12. The touch screen according to any one of claims 1 to 11, wherein a micro-nano structure is provided on at least one of the two surfaces forming the friction interface.

13. The touch screen of claim 9, wherein the intermediate thin film layer is a polydimethylsiloxane, polyvinylidene fluoride, or fluorinated ethylene propylene copolymer film formed on a corresponding transparent substrate by roll brushing and treated by a plasma etching technique or a corona method.

14. A touch screen according to any of claims 1 to 13, wherein the via layer is a via structure of polyethylene terephthalate, polyethylene or polyvinyl chloride.

15. The touch screen of claim 14, wherein the cross-sectional area of the through-hole is 1-100mm²The cross section is in the shape of a regular polygon, and the distance between the opposite sides of the adjacent through holes is 0.5-3 mm.

16. The touch screen of any one of claims 4-15, wherein the material of the first transparent substrate and/or the second transparent substrate and/or the third transparent substrate is polyethylene terephthalate, polyethylene or polyvinyl chloride.

17. The touch panel according to any one of claims 1 to 16, wherein the common electrode layer is an indium tin oxide layer formed on the first side surface of the first transparent substrate by a vacuum sputtering method; the array points or array blocks of the array electrode layer are formed by performing plasma etching on the indium tin oxide layer prepared on the first side surface of the second transparent substrate by a vacuum sputtering method.