WO2019227867A1 - 电磁触控屏、终端设备和电磁触控屏的制备方法 - Google Patents

电磁触控屏、终端设备和电磁触控屏的制备方法 Download PDF

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Publication number
WO2019227867A1
WO2019227867A1 PCT/CN2018/115978 CN2018115978W WO2019227867A1 WO 2019227867 A1 WO2019227867 A1 WO 2019227867A1 CN 2018115978 W CN2018115978 W CN 2018115978W WO 2019227867 A1 WO2019227867 A1 WO 2019227867A1
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Prior art keywords
adhesive layer
antenna array
transparent substrate
touch screen
electromagnetic touch
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PCT/CN2018/115978
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English (en)
French (fr)
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刘天保
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广州视源电子科技股份有限公司
广州视睿电子科技有限公司
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Publication of WO2019227867A1 publication Critical patent/WO2019227867A1/zh

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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
    • G06F3/046—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by electromagnetic means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices

Definitions

  • the present disclosure relates to the field of smart tablets, for example, to an electromagnetic touch screen, a terminal device, and a method for manufacturing the electromagnetic touch screen.
  • the related large-size electromagnetic touch screen generally adopts a silver paste printing process, that is, the antenna array in the related electromagnetic touch screen is made by printing with silver paste through a screen.
  • the antenna is printed by silver paste
  • the screen is non-transparent, and it cannot be applied to products of direct type light emitting diode (DLED) light sources, and the vias must be connected to the wiring before printing. It is complicated to prepare the required silver paste conductive material, which is not easy to save, the cost is high, and the production yield is low, which is not conducive to mass production promotion.
  • DLED direct type light emitting diode
  • the embodiments of the present disclosure provide an electromagnetic touch screen, a terminal device, and a method for preparing an electromagnetic touch screen, so as to realize the application of the electromagnetic touch screen in a DLED light source product, reduce the production cost, improve the production yield, and thereby facilitate large-scale production. Production promotion.
  • an embodiment of the present disclosure provides an electromagnetic touch screen, including a transparent substrate, an adhesive layer, and an antenna array, wherein:
  • the transparent substrate includes a first transparent substrate and a second transparent substrate
  • the adhesive layer is disposed between the first transparent substrate and the second transparent substrate;
  • the antenna array is embedded in the adhesive layer.
  • an embodiment of the present disclosure further provides a terminal device, which includes a direct type backlight source and the electromagnetic touch screen described in any one of the embodiments of the present disclosure;
  • the electromagnetic touch screen is disposed on a light exit side of the direct-type backlight.
  • an embodiment of the present disclosure further provides a method for manufacturing an electromagnetic touch screen, and the method includes:
  • the first surface of the second transparent substrate is bonded toward the first surface of the first transparent substrate, and the first surface of the second transparent substrate is covered with a second adhesive layer.
  • the antenna array is embedded between the first adhesive layer and the second adhesive layer;
  • the thickness of the second adhesive layer is greater than the thickness of the first adhesive layer.
  • FIG. 1a is a schematic structural diagram of an electromagnetic touch screen provided by Embodiment 1 of the present disclosure.
  • FIG. 1b is a schematic structural diagram of another electromagnetic touch screen according to the first embodiment of the present disclosure.
  • FIG. 2 is a schematic flowchart of a method for manufacturing an electromagnetic touch screen provided in Embodiment 2 of the present disclosure.
  • FIG. 1a is a schematic structural diagram of an electromagnetic touch screen provided by Embodiment 1 of the present disclosure. As shown in FIG. 1 a, the electromagnetic touch screen includes a transparent substrate 1, an adhesive layer 2, and an antenna array 3.
  • the transparent substrate 1 includes a first transparent substrate 11 and a second transparent substrate 12.
  • the adhesive layer 2 is disposed between the first transparent substrate 11 and the second transparent substrate 12.
  • the antenna array 3 is embedded in the adhesive layer 2.
  • the material of the transparent substrate 1 is a transparent material with good light transmission and good dielectric properties, such as polymethyl methacrylate (PMMA), polystyrene (PS), and polycarbonate (Polycarbonate). , PC).
  • the transparent substrate 1 is polyethylene terephthalate (PET).
  • PET polyethylene terephthalate
  • the adhesive layer 2 is a transparent adhesive layer, such as an optical adhesive (OCA) or a two-component silica gel (AB silica gel).
  • OCA optical adhesive
  • AB silica gel two-component silica gel
  • the adhesive layer and the transparent substrate used in the electromagnetic touch screen provided in this embodiment are both transparent materials and have good light transmission performance, the application of the electromagnetic touch screen in DLED light source products can be realized.
  • the adhesive layer and the transparent substrate have good ductility, resistance to bending, and low cost, the production yield is greatly improved, the production cost is greatly reduced, and then mass production can be promoted.
  • the antenna array 3 provided in this embodiment is embedded in the adhesive layer 2 and is configured to sense a change in a magnetic field to generate a corresponding touch instruction. Since the adhesive layer is transparent and insulated, the antenna array 3 embedded in the adhesive layer 2 can realize the insulation and protection of the antenna array 3 without affecting the light transmittance of the electromagnetic touch screen, and improve Production yield.
  • the antenna array 3 may include a first antenna array layer 31 and a second antenna array layer 32, wherein the two antenna array layers each use a wire as a line material, and the first antenna array layer 31 and the second antenna The wiring of the array layer 32 is staggered in a vertical state. The advantage of this distribution method is that the electromagnetic touch screen can better receive electromagnetic signals sent from the outside.
  • the adhesive layer 2 includes a first adhesive layer 21 and a second adhesive layer 22, wherein the first adhesive layer 21 is an adhesive layer between the antenna array 3 and the first surface of the first transparent substrate 11,
  • the second adhesive layer 22 is an adhesive layer between the antenna array 3 and the first surface of the second transparent substrate 12; the thickness of the first adhesive layer 21 and the thickness of the second adhesive layer 22 are not less than those used in the antenna array 3.
  • the diameter of the wire is twice; the second transparent substrate 12 is disposed on the fixed side of the electromagnetic touch screen, and the thickness of the second adhesive layer 22 is greater than the thickness of the first adhesive layer 21.
  • the first surface of the first transparent substrate 11 is a side facing the second transparent substrate 12; the first surface of the second transparent substrate 12 is a side facing the first transparent substrate 11.
  • the conductive wire may be an aluminum wire or an alloy wire.
  • the wires are copper wires.
  • the first transparent substrate 11 is disposed on the front of the electromagnetic touch screen
  • the second transparent substrate 12 is disposed on the back of the electromagnetic touch screen.
  • the second transparent substrate 12 is disposed On the fixed side of the electromagnetic touch screen, for example, the electromagnetic touch screen is fixed by a backlight support column.
  • the thickness of the second adhesive layer 22 needs to be greater than the thickness of the first adhesive layer 21.
  • the first A transparent substrate 11 is disposed on a fixed side of the electromagnetic touch screen.
  • the electromagnetic touch screen is fixed by a front support post.
  • the thickness of the first adhesive layer 21 needs to be greater than the thickness of the second adhesive layer 22.
  • the advantage of this setting is that the thickened adhesive layer can protect the antenna array traces and avoid being damaged by the supporting pillars.
  • the thickness of the first adhesive layer 21 and the second adhesive layer 22 is not less than twice the diameter of the wire used in the antenna array 3.
  • the advantage is that it can effectively protect the first adhesive layer 21 and the second adhesive layer 22 from being stuck.
  • the cross point pressure caused by the superposition of two layers of wires. Avoid abrasion on the surface of the wire.
  • the thickness of the second adhesive layer 22 is not less than three times the diameter of the wire used in the antenna array 3.
  • the outer surface of the wires used in the antenna array 3 has an insulating protection layer.
  • the insulation protection layer may be an insulation protection rubber sleeve wrapped around a wire used in the antenna array 3. It may also be an insulating material, such as an insulating adhesive, provided between the first antenna array layer 31 and the second antenna array layer 32, which is not limited herein.
  • the purpose of providing an insulating protection layer on the outer surface of the wire is to protect the wire while avoiding a series electrical short circuit between different antenna array layers.
  • the conductive wire is a copper wire, and the diameter of the copper wire is 20-50 ⁇ m.
  • the diameter of the wire can affect the conductive performance of the wire and the light transmission effect of the electromagnetic touch screen, that is, the thicker the wire, the better the conductive performance, and the thinner the wire, the better the light transmission effect of the electromagnetic touch screen. Therefore, set the wire
  • the advantage of a copper wire with a diameter of 20-50 ⁇ m is that the copper wire has good performance and good, and within this diameter range, the conductive performance of the copper wire and the light transmission effect of the electromagnetic touch screen can reach the best balance point, so Conducive to improving the production yield and efficiency of electromagnetic touch screen.
  • the insulating protection layer is black or dark gray.
  • the advantage of setting the insulation protection layer to black or dark gray is that black and dark gray can effectively avoid reflection and / or refraction interference when the backlight source penetrates, thereby avoiding the occurrence of rainbow patterns and light color temperature shift.
  • the second surface of the second transparent substrate 12 is a uniform rough surface.
  • the uniform rough surface is a translucent uniform rough surface obtained through a polarizer surface treatment (Anti-Glare (AG) process).
  • the second surface of the second transparent substrate 12 is the opposite of the first surface.
  • the advantage of setting this surface as a uniform rough surface is that it can prevent the light emitted by the backlight from being directly reflected, thereby improving the influence of the antenna array on the backlight.
  • the haze of the uniform rough surface ranges from 3% to 10%. This haze range can both improve the influence of the antenna array on the backlight source while ensuring good light transmission performance.
  • a transparent substrate and an adhesive layer are respectively provided on both sides of the antenna array, wherein the transparent substrate includes a first transparent substrate and a second transparent substrate, and the adhesive layer is disposed on the first transparent substrate. Between the antenna and the second transparent substrate, the antenna array is embedded in the adhesive layer.
  • the advantages of the transparent and non-conductive adhesive layer, the transparent substrate is transparent, and the cost of the adhesive layer and the transparent substrate are low.
  • the silver paste printing process is used, which can not be applied to DLED light source products, the processing technology is complex, difficult to save, high cost, low production yield, and problems that are not conducive to mass production promotion.
  • the application of DLED light source products reduces production costs and improves production yield, which is conducive to the effect of mass production promotion.
  • this is a schematic structural diagram of another electromagnetic touch screen provided in this embodiment.
  • it further includes a light guide plate and a diffusion plate.
  • One type (light guide plate or diffusion plate 4) and a third adhesive layer 23; the third adhesive layer 23 covers the second surface of the first transparent substrate 11, and the light guide plate or diffusion plate 4 is attached to the third adhesive layer 23. .
  • the thickness of the third adhesive layer 23 may be set to be the same as the thickness of the first adhesive layer 21 and cover the second surface of the first transparent substrate 11 included in the transparent substrate 1.
  • the second surface of the base material 11 is opposite to the first surface.
  • a light guide plate or a diffusion plate is disposed on the front surface of the electromagnetic touch screen, and is adhered to the third adhesive layer 23, so that the light emitted by the backlight passes through the second transparent substrate 12 and the second adhesive in order.
  • the light guide plate or the diffuser plate 4 is irradiated, and the light emitted by the backlight is made through the light guide plate or the diffuser plate 4. Evenly distributed on the entire display surface to enhance the user's viewing experience.
  • an embodiment of the present disclosure further provides a terminal device.
  • the terminal device includes a direct-type backlight source and the electromagnetic touch screen according to any one of the foregoing embodiments, wherein the electromagnetic touch screen is provided at Light-emitting side of direct-lit backlight.
  • the electromagnetic touch screen is set on the light-emitting side of the direct-type backlight (DLED light source).
  • the back of the electromagnetic touch screen may be set to face the light-emitting side of the DLED light source, so that the DLED light source emits The light can pass through the electromagnetic touch screen, so as to realize the application of the electromagnetic touch screen in a product having a DLED light source.
  • FIG. 2 is a schematic flowchart of a method for manufacturing an electromagnetic touch screen provided in Embodiment 2 of the present disclosure. This method can be applied to the case of preparing an electromagnetic touch screen. It includes the following steps:
  • Step 210 Print the wiring of the antenna array on the first adhesive layer, wherein the first adhesive layer covers the first surface of the first transparent substrate.
  • the material of the first transparent substrate is a transparent material with good light transmission and good dielectric properties, such as PMMA, PS, PC, etc.
  • the material of the first transparent substrate is For PET.
  • the first transparent substrate is disposed on the front surface of the electromagnetic touch screen, and the first surface of the first transparent substrate is covered with a first adhesive layer.
  • the first adhesive layer is a transparent adhesive layer, such as an optical adhesive or a two-component silica gel (AB silica gel).
  • front PET the appearance of the front PET can be checked. After passing the inspection, the front PET is positioned to the printer. Place the first side of the front PET covered with OCA (hereinafter referred to as the front OCA) as the first adhesive layer, and remove the front OCA protective film to facilitate subsequent antenna array printing operations.
  • the antenna array is printed and routed on the exposed surface of the first adhesive layer. Since the prepared electromagnetic touch screen is required to have transparent application characteristics, the entire preparation process must be completed in a dust-free standard environment within a specific thousand level.
  • the antenna array may use a wire as a line material.
  • the diameter of the wire is set to 20-50 ⁇ m.
  • the thickness of the first adhesive layer can be set to be greater than or equal to twice the diameter of the wire.
  • the antenna array is printed on the first adhesive layer, and the thickness of the first adhesive layer is smaller than the thickness of the second adhesive layer. Since the antenna print head needs to detect the height of the positioning wiring in real time, and the adhesive is transparent, If the glue is too thick, it can easily lead to misjudgment. Printing the antenna array on a thin glue (that is, the first glue layer) can reduce the probability of misjudgment, which is beneficial to the wiring operation of the antenna array.
  • the antenna array may be operated by a special multi-axis 3D printing device to perform a wiring process operation, and prepared according to a specific designed functional pattern.
  • the antenna array includes a first antenna array layer and a second antenna array layer.
  • printing the wiring of the antenna array on the first adhesive layer includes: printing the first antenna array layer on the first adhesive layer of the first transparent substrate according to a preset wiring direction; After the antenna array layer is printed, the second antenna array layer is printed on the first antenna array layer or the second adhesive layer in a vertical direction of the preset wiring direction, so that the wiring of the first antenna array layer and the second antenna array layer is rendered. Vertical state staggered.
  • a first antenna array layer is printed on a first adhesive layer of a first transparent substrate, and a line test is performed on the printed first antenna array layer. After the test is passed, the first antenna array layer is continued. Print the second antenna array layer.
  • a first antenna array layer is printed on a first adhesive layer of a first transparent substrate
  • a second antenna array layer is printed on a second adhesive layer of a second transparent substrate, and each antenna array after printing is completed Layer for line testing.
  • the two antenna array layers each use a wire with an insulating protective layer on the outer surface as the line material, and the wiring of the two antenna array layers is staggered in a vertical state.
  • the two antenna array layers must be printed on the front and back sides, or even on a single side, an insulating bridge should be printed in advance before the intersection of the printed lines.
  • the process is complicated, the cost is high, and the yield is low.
  • the two antenna array layers are printed and wired on the first adhesive layer or on the first and second adhesive layers, respectively. Since the adhesive layers are not conductive, there is no need to print different antenna array layers on the front and back of the substrate. On both sides, it is only necessary to print the first antenna array layer and the second antenna array layer on the single-sided adhesive layer, and attach the first transparent substrate and the second transparent substrate, and there is no need to cross the line. Insulation treatment not only reduces the difficulty and cost of the process, but also improves the production yield, thereby improving production efficiency.
  • Step 220 The first transparent substrate is bonded to the first surface of the second transparent substrate.
  • the first surface of the second transparent substrate is covered with a second adhesive layer.
  • the antenna array is embedded between the first adhesive layer and the second adhesive layer.
  • the thickness of the second adhesive layer is greater than the thickness of the first adhesive layer.
  • the entire processed The first transparent substrate is transferred to a bonding machine for subsequent bonding operations.
  • the material of the second transparent substrate may be the same as the material of the first transparent substrate. It is a transparent material with good light transmission and good dielectric properties. For example, it may be PMMA, PS, PC, etc.
  • the material of the second transparent substrate is PET.
  • the second transparent substrate is disposed on the back surface of the electromagnetic touch screen, and the first surface is covered with a second adhesive layer.
  • the second adhesive layer may be the same as the first adhesive layer, and is a transparent adhesive layer, such as an optical adhesive or a two-component silica gel (ie, AB silica gel).
  • back PET a second transparent substrate
  • OCA (hereinafter referred to as a back surface OCA) protective film covering the first surface of the back PET as a second adhesive layer, and bonding the first surface of the back PET toward the first surface of the front PET, so that the back OCA and The front OCA fits.
  • the entire product after the lamination may be visually inspected, and then a fixture test may be performed to test the antenna embedded between the first adhesive layer and the second adhesive layer after lamination. The array is tested for electrical performance.
  • the antenna array is printed and wired on the first adhesive layer, wherein the first adhesive layer covers the first surface of the first transparent substrate, and then the first surface of the second transparent substrate faces The first surface of the first transparent substrate is bonded, wherein the first surface of the second transparent substrate is covered with a second adhesive layer, so that the antenna array is embedded between the first adhesive layer and the second adhesive layer.
  • the adhesive layer and the transparent substrate are used, and the antenna array is printed on the single-sided adhesive layer, so that the electromagnetic touch screen prepared by this method can be applied to the products of the DLED light source, and the preparation process is simplified, and the production cost is reduced. , Which improves the production yield and production efficiency of the electromagnetic touch screen.
  • the method further includes: The bonding surface of the two adhesive layers is defoamed.
  • the one-time bonding process may cause the close bonding between the first adhesive layer and the second adhesive layer, that is, bubbles may appear, etc.
  • the product after the bonding is put into a high-pressure degassing machine for degassing. Bubble treatment so that the adhesion between the first glue layer and the second glue layer is tight and free of bubbles.
  • the product after the defoaming treatment can also be subjected to processes such as wiring, process inspection, and electrical performance testing, so as to finally prepare an electromagnetic touch screen.
  • a flexible printed circuit board (FPC) line ie, a cable
  • the process inspection may include inspecting the overall appearance of the product, such as detecting whether there is a deviation in the fit.
  • the electrical performance test may include a comprehensive test of the entire circuit after the FPC line is connected to ensure that the electromagnetic touch screen has no errors.

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Abstract

本文公开了一种电磁触控屏，包括透明基材、胶层以及天线阵列，其中：所述透明基材包括第一透明基材和第二透明基材；所述胶层设置在所述第一透明基材和所述第二透明基材之间；所述天线阵列嵌于所述胶层中。本文还公开了一种终端设备和电磁触控屏的制备方法。

Description

电磁触控屏、终端设备和电磁触控屏的制备方法
本申请要求在2018年5月29日提交中国专利局、申请号为201810529014.0的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本公开涉及智能平板领域，例如涉及一种电磁触控屏、终端设备和电磁触控屏的制备方法。
背景技术
随着电子科技的不断发展，触控屏越来越成为多种电子产品的必备组件，例如电磁触控屏，被广泛应用在智能交互平板领域。相关的大尺寸电磁触控屏普遍采用银浆印刷工艺制程，也即相关电磁触控屏中的天线阵列是通过丝网用银浆印刷制成的。
由于天线是由银浆印刷的，因此屏幕是非透明的，不能应用在直下式发光二极管(Direct Type Light Emitting Diode，DLED)光源的产品中，且银浆印刷前要过孔连接线路，加工工艺极其复杂，制备所需的银浆导电材料，不易保存、成本高，且生产良率低，不利于大批量生产推广。
发明内容
本公开实施例提供一种电磁触控屏、终端设备和电磁触控屏的制备方法，以实现电磁触控屏在DLED光源产品中的应用，降低生产成本，提高生产良率，进而利于大批量生产推广。
在一实施例中，本公开实施例提供了一种电磁触控屏，包括透明基材、胶层以及天线阵列，其中：
所述透明基材包括第一透明基材和第二透明基材；
所述胶层设置在所述第一透明基材和所述第二透明基材之间；
所述天线阵列嵌于所述胶层中。
在一实施例中，本公开实施例还提供了一种终端设备，该设备包括直下式背光源和本公开实施例中任一所述的电磁触控屏；
所述电磁触控屏设置于所述直下式背光源的出光侧。
在一实施例中，本公开实施例还提供了一种电磁触控屏的制备方法，该方法包括：
将天线阵列的布线打印在第一胶层上，其中，所述第一胶层覆盖于第一透明基材的第一面；
将第二透明基材的第一面朝向所述第一透明基材的第一面进行贴合，其中，所述第二透明基材的第一面覆盖有第二胶层，在所述贴合的过程中，使所述天线阵列嵌入在所述第一胶层与所述第二胶层之间；
其中，所述第二胶层的厚度大于所述第一胶层的厚度。
附图说明
图1a是本公开实施例一提供的一种电磁触控屏的结构示意图；
图1b是本公开实施例一提供的另一种电磁触控屏的结构示意图；
图2是本公开实施例二提供的一种电磁触控屏的制备方法的流程示意图。
具体实施方式
下面结合附图和实施例对本公开进行说明。此处所描述的实施例仅仅用于解释本公开，而非对本公开的限定。为了便于描述，附图中仅示出了与本公开相关的部分而非全部结构。
实施例一
图1a为本公开实施例一提供的一种电磁触控屏的结构示意图。如图1a所示，该电磁触控屏包括：透明基材1、胶层2以及天线阵列3。
透明基材1包括第一透明基材11和第二透明基材12，胶层2设置在第一透明基材11和第二透明基材12之间，天线阵列3嵌于胶层2中。
在一实施例中，透明基材1的材质为透光性好、介电性能好的透明材料，例如有机玻璃(Polymethyl methacrylate，PMMA)，聚苯乙烯(Polystyrene，PS)，聚碳酸酯(Polycarbonate，PC)。在一实施例中，透明基材1为聚对苯二甲酸乙二醇酯(Polyethylene terephthalate，PET)。在一实施例中，若透明基材1中包括的第一透明基材11位于电磁触控屏的正面，也即用户观看面，则第二透明基材12位于电磁触控屏的背面，也即背光源照射面；若第二透明基材12位于电磁触控屏的正面，则第一透明基材11位于电磁触控屏的背面。
本实施例中，胶层2为透明胶层，例如光学胶(Optically Clear Adhesive，OCA)或双组份硅胶(AB硅胶)。示例性的，胶层2分别与第一透明基材11以及第二透明基材12相贴合，也即胶层2的第一面与第一透明基材11相贴合，胶层2的第二面与第二透明基材12相贴合。
由于本实施例中提供的电磁触控屏中所使用的胶层和透明基材均属于透明材质，透光性能好，因此，可以实现电磁触控屏在DLED光源产品中的应用。 另外，由于胶层和透明基材的延展性好，耐弯曲，且成本低，因而生产良率大大提高，生产成本极大降低，进而可以大批量生产推广。
本实施例提供的天线阵列3嵌于胶层2中，设置为感应磁场变化，以产生相应的触控指令。由于胶层是透明且绝缘的，因此，天线阵列3嵌于胶层2中可以实现在不影响电磁触控屏的透光性的情况下，可以对天线阵列3起到绝缘、保护作用，提高生产良率。在一实施例中，天线阵列3可以包括第一天线阵列层31和第二天线阵列层32，其中，两层天线阵列层均使用导线作为线路材质，且第一天线阵列层31和第二天线阵列层32的布线呈垂直状态交错分布，这种分布方式的好处在于，可以使电磁触控屏更好地接收到外界发送的电磁信号。
在一实施例中，胶层2包括第一胶层21和第二胶层22，其中，第一胶层21为天线阵列3与第一透明基材11的第一面之间的胶层，第二胶层22为天线阵列3与第二透明基材12的第一面之间的胶层；第一胶层21的厚度以及第二胶层22的厚度均不小于天线阵列3中使用的导线的直径的两倍；第二透明基材12设置于电磁触控屏的固定侧，第二胶层22的厚度大于第一胶层21的厚度。
其中，第一透明基材11的第一面为朝向第二透明基材12的一面；第二透明基材12的第一面为朝向第一透明基材11的一面。在一实施例中，导线可以为铝线或合金线。在一实施例中，导线为铜线，
示例性的，将第一透明基材11设置在电磁触控屏的正面，将第二透明基材12设置在电磁触控屏的背面，在第一种情况下，第二透明基材12设置于电磁触控屏的固定侧，例如电磁触控屏是依靠背光支撑柱固定的，此时，第二胶层22的厚度需大于第一胶层21的厚度；在第二种情况下，第一透明基材11设置于电磁触控屏的固定侧，例如电磁触控屏是依靠前支撑柱固定的，此时，第一胶 层21的厚度就需大于第二胶层22的厚度。这样设置的好处在于，加厚的胶层可以保护天线阵列的走线，避免被支撑柱损伤。
第一胶层21以及第二胶层22的厚度均不小于天线阵列3中使用的导线的直径的两倍的好处在于，可以有效保护第一胶层21与第二胶层22之间执行贴合工序时，对两层导线叠加导致的交叉点压力。避免导线表面绝缘保护层磨损。在上述第一种情况下，在一实施例中，第二胶层22的厚度不小于天线阵列3中使用的导线的直径的三倍。
在一实施例中，天线阵列3中使用的导线的外表面具有绝缘保护层。
其中，绝缘保护层可以是天线阵列3中使用的导线外所包裹的绝缘保护胶套。也可以是第一天线阵列层31与第二天线阵列层32之间设置的绝缘材料，例如绝缘胶，在此不作限定。在导线外表面设置绝缘保护层的目的在于保护导线的同时避免不同天线阵列层之间串电短路。
在一实施例中，导线为铜线，铜线的直径为20-50μm。
示例性的，导线直径可影响导线导电性能以及电磁触控屏的透光效果，也即导线越粗导电性能越好，导线越细电磁触控屏的透光效果越好，因此，将导线设置为直径为20-50μm的铜线的优点在于，铜线具有良好的性能较好，且在该直径范围内，铜线导电性能和电磁触控屏的透光效果能够达到最佳平衡点，从而有利于提升电磁触控屏的生产良率及效率。
在一实施例中，绝缘保护层为黑色或深灰色。将绝缘保护层设置为黑色或深灰色的好处在于，黑色和深灰色可以有效避免背光源穿透时的反射和/或折射干扰，从而避免导致彩虹纹及光色温偏移等情况的发生。
在一实施例中，第二透明基材12的第二面为均匀粗糙面。
示例性的，均匀粗糙面为经偏光片表面处理(防眩光(Anti-Glare，AG)工艺)获得的半透明的均匀的粗糙面。第二透明基材12的第二面为第一面的反面，将该面设置为均匀粗糙面的好处在于，可以避免背光源发出的光被直接反射，从而改善天线阵列对背光源的影响。在一实施例中，该均匀粗糙面的雾度范围为3％-10％。该雾度范围可以在既保证良好透光性能的同时，最大限度改善天线阵列对背光源的影响。
本公开实施例的技术方案，通过在天线阵列的两面分别设置透明基材和胶层，其中，透明基材包括第一透明基材和第二透明基材，胶层设置在第一透明基材和第二透明基材之间，天线阵列嵌于胶层中，利用了胶层透明且不导电、透明基材也透明的、胶层和透明基材成本低等优点，解决了相关技术中因采用银浆印刷工艺制程，而导致的不能应用在DLED光源的产品中、加工工艺复杂、不易保存、成本高、生产良率低以及不利于大批量生产推广的问题，实现了电磁触控屏在DLED光源产品中的应用，降低生产成本，提高生产良率，进而利于大批量生产推广的效果。
如图1b所示，为本实施例提供的另一种电磁触控屏的结构示意图，其中，在上述实施例的基础上，在一实施例中，还包括导光板和扩散板两者中的一种(导光板或扩散板4)以及第三胶层23；第三胶层23覆盖于第一透明基材11的第二面，导光板或扩散板4贴合于第三胶层23上。
在一实施例中，第三胶层23的厚度可设置为与第一胶层21的厚度相同，覆盖于透明基材1包括的第一透明基材11的第二面，其中，第一透明基材11的第二面为第一面的反面。示例性的，将导光板或扩散板设置在电磁触控屏的正面，与第三胶层23相贴合，作用在于，使背光源发出的光依次经过第二透明 基材12、第二胶层22、天线阵列3、第一胶层21、第一透明基材11以及第三胶层23后，照射在导光板或扩散板4上，通过导光板或扩散板4使得背光源发出的光均匀分布于整个显示面，提升用户的观看体验。
在上述实施例的基础上，本公开实施例还提供了一种终端设备，该终端设备包括直下式背光源和上述任一实施例所述的电磁触控屏，其中，电磁触控屏设置于直下式背光源的出光侧。
示例性的，将电磁触控屏设置于直下式背光源(DLED光源)的出光侧，在一实施例中，可以将电磁触控屏的背面朝向DLED光源的出光侧进行设置，使得DLED光源发出的光可透过该电磁触控屏，从而实现电磁触控屏在具有DLED光源的产品中的应用。
实施例二
图2为本公开实施例二提供的一种电磁触控屏的制备方法的流程示意图。该方法可适用于制备电磁触控屏的情况。包括如下步骤：
步骤210、将天线阵列的布线打印在第一胶层上，其中，第一胶层覆盖于第一透明基材的第一面。
在一实施例中，第一透明基材的材质为透光性好、介电性能好的透明材料，例如可以是PMMA、PS、PC等，在一实施例中，第一透明基材的材质为PET。在一实施例中，第一透明基材置于电磁触控屏的正面，第一透明基材的第一面覆盖有第一胶层。其中，第一胶层为透明胶层，例如光学胶或双组份硅胶(AB硅胶)。示例性的，以PET基材和光学胶为例，在使用PET作为第一透明基材(以下称为正面PET)之前，可先检查正面PET的外观，检查合格后，将正面PET定位至打印机台，并将覆盖有作为第一胶层的OCA(以下称为正面OCA) 的正面PET的第一面朝上放置，揭掉正面OCA的保护膜，以便于进行后续的天线阵列打印操作。
示例性的，天线阵列打印布线在第一胶层的外露面上。由于要求制备的电磁触控屏具有透明的应用特性，所以整个制备环节要在特定的千级以内无尘标准的环境内完成。
本实施例中天线阵列可使用导线作为线路材质。在一实施例中，导线的直径设置为20-50μm。在一实施例中，第一胶层的厚度可设置为大于等于导线直径的两倍。示例性的，在第一胶层上打印天线阵列，而第一胶层的厚度小于第二胶层的厚度，由于天线打印头要实时侦测定位布线的高度，而胶是透明的，因此，若胶过厚，容易导致误判，将天线阵列打印在薄胶(也即第一胶层)上，可以减小误判几率，有利于天线阵列的布线操作。
在一实施例中，天线阵列可通过特制的多轴3D打印设备进行布线工艺操作，并按特定设计的功能图形制备而成。
在一实施例中，天线阵列包括第一天线阵列层和第二天线阵列层。
在一实施例中，将天线阵列的布线打印在第一胶层上，包括：在第一透明基材的第一胶层上，按照预设布线方向打印第一天线阵列层；当确认第一天线阵列层打印完毕后，在第一天线阵列层或第二胶层上按照预设布线方向的垂直方向打印第二天线阵列层，以使第一天线阵列层和第二天线阵列层的布线呈垂直状态交错分布。
示例性的，在第一透明基材的第一胶层上打印第一天线阵列层，并对打印完毕后的第一天线阵列层进行线路测试，测试通过后，在第一天线阵列层上继续打印第二天线阵列层。或者，在第一透明基材的第一胶层上打印第一天线阵 列层，在第二透明基材的第二胶层上打印第二天线阵列层，并对打印完毕后的每个天线阵列层进行线路测试。其中，两层天线阵列层均使用外表面带有绝缘保护层的导线作为线路材质，且两层天线阵列层的布线呈垂直状态交错分布。对于传统银浆印刷工艺制程而言，由于银浆为导电材料，因此两个天线阵列层必须分别印刷在前后两面，或者即使印刷在单面，在印刷线路交叉点之前要提前印刷绝缘搭桥，不仅工艺复杂，成本高，而且良率偏低。将两个天线阵列层先后打印布线在第一胶层上或分别打印在第一胶层和第二胶层上，由于胶层不导电，因此无需将不同的天线阵列层印刷在基材的前后两面，只需将第一天线阵列层和第二天线阵列层分别印刷在单面胶层上，并将第一透明基材和第二透明基材相贴合即可，且无需对线路交叉点作绝缘处理，既降低了工艺难度和成本，又提高了生产良率，从而提高生产效率。
步骤220、将第二透明基材的第一面朝向第一透明基材的第一面进行贴合，其中，第二透明基材的第一面覆盖有第二胶层，在所述贴合的过程中，使天线阵列嵌入在第一胶层与所述第二胶层之间。
其中，第二胶层的厚度大于第一胶层的厚度。将天线阵列打印在薄胶上的好处在于，可以减小误判几率，有利于天线阵列的布线操作。
在一实施例中，当确定天线阵列打印结束后，也即第一透明基材的第一面上覆盖有第一胶层，且第一胶层上打印有天线阵列后，将整个加工后的第一透明基材转移至贴合机台，以便进行后续的贴合操作。
在一实施例中，第二透明基材的材质可与第一透明基材的材质一样，为透光性好、介电性能好的透明材料，例如可以是PMMA、PS、PC等，在一实施例中，第二透明基材的材质为PET。第二透明基材设置于电磁触控屏的背面，其 第一面覆盖有第二胶层。其中，第二胶层可以与第一胶层一样，为透明胶层，例如光学胶或双组份硅胶(即：AB硅胶)。示例性的，以PET基材和光学胶为例，在使用PET作为第二透明基材(以下称为背面PET)进行贴合操作之前，可先检查背面PET的外观，检查合格后，揭掉覆盖在背面PET的第一面上的作为第二胶层的OCA(以下称为背面OCA)保护膜，并将背面PET第一面朝向正面PET的第一面进行贴合操作，使得背面OCA与正面OCA相贴合。在一实施例中，贴合操作完成后，可对贴合后的整个产品先外观检查，再进行治具测试，以对贴合后嵌入在第一胶层和第二胶层之间的天线阵列进行电性能测试。
本实施例的技术方案，通过将天线阵列打印布线在第一胶层上，其中，第一胶层覆盖于第一透明基材的第一面，再将第二透明基材的第一面朝向第一透明基材的第一面进行贴合，其中，第二透明基材的第一面覆盖有第二胶层，以使天线阵列嵌入在第一胶层与第二胶层之间，通过使用胶层和透明基材，并将天线阵列打印在单面胶层上，使得该方法制备得到的电磁触控屏可以被应用在DLED光源的产品中，并且简化了制备过程，降低了生产成本，提高了电磁触控屏的生产良率以及生产效率。
在上述实施例的基础上，在一实施例中，在将第二透明基材的第一面朝向第一透明基材的第一面进行贴合之后，还包括：对第一胶层和第二胶层的贴合面进行脱泡处理。
由于一次性贴合工艺可能会造成第一胶层和第二胶层之间贴合不紧密，也即，可能会出现气泡等，因此，将贴合后的产品放入高压脱泡机进行脱泡处理，以使第一胶层和第二胶层之间的贴合紧密无气泡。
示例性的，经过脱泡处理后的产品还可经过接线、工艺检查、电性能测试 等过程，从而最终制备成电磁触控屏。在一实施例中，可以给天线阵列的出线端连接上柔性印刷电路板(Flexible Printed Circuit，FPC)线(即：排线)，以便于在使用电磁触控屏时进行外接电路的连接。在一实施例中，工艺检查可以包括对产品的整体外观进行检查，例如检测贴合是否有偏差等。在一实施例中，电性能测试可以包括对连接上FPC线之后的整体线路进行综合测试，以确保电磁触控屏的线路无差错。

Claims (16)

  1. 一种电磁触控屏，包括透明基材、胶层以及天线阵列，其中：
    所述透明基材包括第一透明基材和第二透明基材；
    所述胶层设置在所述第一透明基材和所述第二透明基材之间；
    所述天线阵列嵌于所述胶层中。
  2. 根据权利要求1所述的电磁触控屏，其中，所述天线阵列包括第一天线阵列层和第二天线阵列层，所述第一天线阵列层的布线和所述第二天线阵列层的布线呈垂直状态交错分布。
  3. 根据权利要求1所述的电磁触控屏，其中，所述胶层包括第一胶层和第二胶层，其中，所述第一胶层为所述天线阵列与所述第一透明基材的第一面之间的胶层，所述第二胶层为所述天线阵列与所述第二透明基材的第一面之间的胶层。
  4. 根据权利要求3所述的电磁触控屏，其中，所述第一胶层的厚度以及所述第二胶层的厚度均不小于所述天线阵列中使用的导线的直径的两倍。
  5. 根据权利要求3或4所述的电磁触控屏，其中，所述第二透明基材设置于所述电磁触控屏的固定侧，所述第二胶层的厚度大于所述第一胶层的厚度。
  6. 根据权利要求4所述的电磁触控屏，其中，所述天线阵列中使用的导线的外表面具有绝缘保护层。
  7. 根据权利要求6所述的电磁触控屏，其中，所述导线为铜线，所述铜线的直径为20-50μm。
  8. 根据权利要求6所述的电磁触控屏，其中，所述绝缘保护层为黑色或深灰色。
  9. 根据权利要求3所述的电磁触控屏，其中，所述第二透明基材的第二面 为均匀粗糙面。
  10. 根据权利要求9所述的电磁触控屏，其中，所述均匀粗糙面的雾度范围为3％-10％。
  11. 根据权利要求3-10任一项所述的电磁触控屏，还包括导光板和扩散板中的一种以及第三胶层；
    所述第三胶层覆盖于所述第一透明基材的第二面，所述导光板或所述扩散板贴合于所述第三胶层上。
  12. 一种终端设备，其中，包括直下式背光源和权利要求1-11任一项所述的电磁触控屏；
    所述电磁触控屏设置于所述直下式背光源的出光侧。
  13. 一种电磁触控屏的制备方法，包括：
    将天线阵列的布线打印在第一胶层上，其中，所述第一胶层覆盖于第一透明基材的第一面；
    将第二透明基材的第一面朝向所述第一透明基材的第一面进行贴合，其中，所述第二透明基材的第一面覆盖有第二胶层，在所述贴合的过程中，使所述天线阵列嵌入在所述第一胶层与所述第二胶层之间；
    其中，所述第二胶层的厚度大于所述第一胶层的厚度。
  14. 根据权利要求13所述的方法，其中，所述天线阵列包括第一天线阵列层和第二天线阵列层。
  15. 根据权利要求14所述的方法，其中，所述将天线阵列的布线打印在第一胶层上，包括：
    在所述第一透明基材的第一胶层上，按照预设布线方向打印所述第一天线 阵列层；
    当确认所述第一天线阵列层打印完毕后，在所述第一天线阵列层或所述第二胶层上按照所述预设布线方向的垂直方向打印所述第二天线阵列层，以使所述第一天线阵列层和所述第二天线阵列层的布线呈垂直状态交错分布。
  16. 根据权利要求13-15任一项所述的方法，在将第二透明基材的第一面朝向所述第一透明基材的第一面进行贴合之后，包括：
    对所述第一胶层和所述第二胶层的贴合面进行脱泡处理。
PCT/CN2018/115978 2018-05-29 2018-11-16 电磁触控屏、终端设备和电磁触控屏的制备方法 WO2019227867A1 (zh)

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CN111651099A (zh) 2020-04-28 2020-09-11 北京载诚科技有限公司 一种触控装置
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