WO2019127160A1 - 曲面触控屏制作方法 - Google Patents

曲面触控屏制作方法 Download PDF

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Publication number
WO2019127160A1
WO2019127160A1 PCT/CN2017/119144 CN2017119144W WO2019127160A1 WO 2019127160 A1 WO2019127160 A1 WO 2019127160A1 CN 2017119144 W CN2017119144 W CN 2017119144W WO 2019127160 A1 WO2019127160 A1 WO 2019127160A1
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Prior art keywords
curved
layer
adhesive layer
manufacturing
functional layer
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PCT/CN2017/119144
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English (en)
French (fr)
Inventor
雷晓华
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深圳市柔宇科技有限公司
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Application filed by 深圳市柔宇科技有限公司 filed Critical 深圳市柔宇科技有限公司
Priority to CN201780097390.0A priority Critical patent/CN111433717A/zh
Priority to PCT/CN2017/119144 priority patent/WO2019127160A1/zh
Publication of WO2019127160A1 publication Critical patent/WO2019127160A1/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

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a method for manufacturing a curved touch screen.
  • Curved touch screens typically include a multi-layered structure of curved laminates.
  • the layer structure may include a touch layer, a protective cover, an optical film layer, and the like.
  • the bending of the various layer structures is mainly carried out by bonding the liquid layer adhesive to the two-layer structure and then curing the liquid glue.
  • the liquid viscose may flow on the surface of the layer structure, and finally the thickness of the adhesive layer may be different after curing, and a gap such as a bonding gap or a bubble may occur.
  • the planar layer structure is bonded by a glue layer, and then formed by a 3D molding method to obtain a curved touch screen.
  • the glue layer is generally a flexible material, and the stress between the layer structure and the glue layer is not uniform and the deformation is different, and the laminated structure is easily separated and misaligned. Affect the quality of the curved touch screen.
  • the invention provides a method for manufacturing a curved touch screen, which has better bonding effect between layers, avoids problems such as gaps and bubbles, and ensures the quality of the curved touch screen.
  • the method for manufacturing the curved touch screen includes the following steps:
  • the at least one surface functional layer, the adhesive layer and the curved cover plate are sequentially stacked in the cavity of the mold; and the curved functional layer and the curved cover are separated by the curved adhesive layer Opening, and the curved surface of the curved adhesive layer, the curved cover, and the at least one curved functional layer are the same, and the opposite surfaces of the curved adhesive layer and the curved functional layer and the The curved cover is attached;
  • the curved adhesion layer, the curved cover plate and the at least one curved functional layer which are laminated and disposed are integrally heated and insulated by the mold, so that the surface of the curved adhesive layer is partially melted, so that the a curved cover plate and the curved functional layer are bonded together by the curved adhesive layer;
  • the curved cover plate bonded together and the curved functional layer are cooled and taken out from the cavity of the mold.
  • the curved cover plate has the same curvature as the at least one curved functional layer.
  • the curved adhesive layer has the same curvature as the curved cover.
  • the at least one surface functional layer includes a curved touch layer or a curved polarizing layer.
  • the at least one surface functional layer includes a curved touch layer and a curved polarizing layer, and the curved touch layer and the curved polarizing layer are also separated by a layer of the curved adhesive layer.
  • the curved touch layer includes a curved substrate and a patterned touch circuit layer disposed on the curved substrate; the curved substrate is obtained by hot press forming or vacuum negative pressure forming; A patterned touch circuit layer is formed on the curved substrate.
  • the method for manufacturing the curved touch screen further includes:
  • the curved adhesion layer, the curved cover and the at least one curved functional layer which are laminated are subjected to an overall vacuum pressure defoaming treatment to eliminate air bubbles between the layers.
  • the curved adhesive layer is a film-type adhesive material, and the heat deformation temperature is 80°-130°.
  • the curved adhesive layer comprises any one of a PU transparent film, a hot melt adhesive film or an EVA transparent film, and the curved adhesive layer has a thickness of 50-150 um.
  • the curved adhesion layer, the curved cover plate and the at least one curved functional layer which are laminated are integrally heated to 120° and kept for 5-10 minutes.
  • the curved adhesive layer is obtained by a hot press forming or a vacuum negative pressure forming process.
  • the mold is a hot press forming mold or a vacuum negative pressure forming mold.
  • the hot press forming or the vacuum negative pressure forming mold is a stainless steel mold.
  • curvature of the cavity is the same as the curvature of the curved cover.
  • the method for manufacturing the curved touch screen of the present invention first provides the curved cover plate having a certain curvature, the at least one curved functional layer and the curved adhesive layer, and the cover plate and the cover are The at least one layer of the curved functional layer and the curved adhesive layer are stacked in the mold, and the laminated curved layer, the curved cover and the at least one curved functional layer are integrally heated by the mold. And thermally insulating, so that the curved adhesive layer is softened and partially melted, so that the curved cover plate and the curved functional layer are bonded together, thereby obtaining the curved touch screen.
  • the first surface and the second surface of the curved adhesive layer are respectively adhered to the curved functional layer and the curved cover, so that the curved cover and the at least one curved functional layer are equal to each other
  • There is no stress between the structure and the curved surface bonding layer and there is no problem such as separation and misalignment of the laminated structure.
  • the surface of the curved adhesive layer is partially melted, that is, the curved adhesive layer has only a certain fluidity on its surface, so that when the adjacent two layer structures are bonded, the curved surface is bonded.
  • the layer does not flow on the surface of the layer structure as in the prior art liquid glue, thereby ensuring the quality of the curved touch screen.
  • FIG. 1 is a flow chart of a method for manufacturing a curved touch screen according to the present invention
  • FIG. 2 is a schematic view of a hot pressing die used in an embodiment of a method for fabricating a curved touch screen according to the present invention
  • FIG. 3 is a schematic view of a hot pressing die used in another embodiment of the method for manufacturing a curved touch screen of the present invention
  • FIG. 4 to FIG. 8 are schematic diagrams showing steps of a method for manufacturing a curved touch screen according to an embodiment of the present invention.
  • 9-11 are schematic diagrams showing steps of a method for manufacturing a curved touch screen according to another embodiment of the present invention.
  • the present invention provides a method for fabricating a curved touch screen 100 to obtain a curved touch screen 100 of better quality. Specifically, when the curvature of the curved touch screen 100 is large, the curved touch screen 100 still has better quality.
  • the curved surface structure in which the curved touch screen is a hemispherical shape is taken as an example for description.
  • the manufacturing method of the curved touch screen 100 specifically includes:
  • Step 110 providing a curved cover 13 and at least one layer of curved functional layers.
  • the curved touch screen 100 of the curved touch screen 100 includes a plurality of layered layer structures, and adjacent two layer structures are attached and fixed together.
  • the layer structure includes a curved cover 13 and at least one curved functional layer, and the curved functional layer is protected by the curved cover 13 , the curved cover 13 and the at least one curved surface
  • the functional layers are curved curved structures.
  • the curved cover 13 and the at least one curved functional layer have the same curvature. It can be understood that, in other embodiments of the present invention, the curvature of the curved cover 13 and the at least one curved functional layer may also be different.
  • the curved cover 13 may be made of glass, plastic or sapphire.
  • the curved cover 13 is formed in a different manner depending on the material of the curved cover 13 .
  • the curvature of the curved cover 13 is the same as the curvature of the curved touch screen 100.
  • the at least one layer of the curved functional layer may include a functional layer such as a touch layer or a polarizing layer, or may include an optical film layer such as an anti-reflection layer, and the touch layer.
  • the curved functional layer is two layers, which are a curved touch layer 11 and a polarizing layer 12 stacked on the curved touch layer 11, and the polarizing layer 12 is located on the curved touch layer. 11 and between the curved cover plates 13.
  • one curved touch layer 11 and one curved polarizing layer 12 having the same curvature as the curved cover are respectively provided.
  • the polarizing layer is bent by thermoforming or vacuum negative pressure to form the curved polarizing layer 12.
  • the curved touch layer 11 includes a curved substrate and a patterned touch circuit layer disposed on the curved substrate.
  • the curved substrate may be a glass substrate or a plastic substrate.
  • a curved substrate having the same curvature as the curved cover 13 can be obtained by different molding methods, and then a patterned touch circuit is formed on the curved substrate by a patterning process.
  • the touch circuit layer faces a side of the curved cover.
  • Step 120 Providing at least one curved adhesive layer 30.
  • the curved adhesive layer 30 is a curved surface structure having the same curvature as the curved cover 13 .
  • the curved adhesive layer 30 is a non-tacky solid at normal temperature, and is viscous after being heated and melted, thereby being capable of bonding adjacent two layer structures together.
  • the curved adhesive layer 30 is a transparent film-like adhesive material having a heat deformation temperature of 80°-130°.
  • the curved adhesive layer 30 may be any one of a transparent film material such as a PU transparent film, a hot melt adhesive film or an EVA transparent film.
  • the curved adhesive layer 30 has a thickness of 50-150 um to prevent the curved adhesive layer 30 from being too thin to firmly bond adjacent two layer structures; at the same time, it can also be avoided.
  • the curved adhesive layer 30 is too thick to affect the thickness of the curved touch layer 100.
  • the curved adhesive layer 30 may be formed into a curved surface structure by hot press molding or vacuum negative pressure molding. Specifically, referring to FIG. 2 and FIG. 4 to FIG. 6 , in the embodiment, the curved adhesive layer 30 is obtained by hot press forming. Specifically, a hot press molding die 20 is provided.
  • the hot press molding die 20 includes an upper die and a lower die, and the upper die is provided with a groove, and the lower die is provided with a protrusion corresponding to the groove.
  • the upper mold is combined with the lower mold to form a cavity 21, and the shape of the cavity 21 is the same as the shape of the curved adhesive layer 30 to be obtained.
  • the curved adhesive layer 30 is formed in the cavity 21.
  • the curvature of the cavity 21 is the same as the curvature of the curved adhesive layer 30, thereby obtaining the curved adhesive layer 30 having a certain curvature.
  • a planar adhesive layer is disposed on the convex conforming curved surface 22, and the hot press molding die 20 is heated to soften the curved adhesive layer 30.
  • the curved adhesive layer 30 includes two opposite surfaces, which are a first surface and a second surface opposite to the first surface.
  • the first surface has the same curvature as the groove wall of the upper film groove, and the second surface has the same surface curvature as the lower die protrusion.
  • the curvatures of the first surface and the second surface are the same as the curvature of the curved cover 13 , that is, the curved adhesive layer 30 has the same curvature as the curved cover 13 .
  • the temperature of the hot press molding die 20 is controlled to be 80°-100°, thereby ensuring that the adhesive film is sufficiently thermally deformed without flow due to high temperature micro-melting, and the obtained
  • the curved adhesive layer 30 has the same thickness at each position.
  • the molding die 20 is made of stainless steel, so that the curved adhesive layer 30 is easily released from the mold.
  • the curved adhesive layer 30 is obtained by vacuum negative pressure molding.
  • a vacuum negative pressure forming mold 40 is provided.
  • the vacuum negative pressure molding die 40 includes a recess 41 that includes a conforming curved surface 42.
  • the bonding curved surface 42 is provided with a plurality of vacuum holes (not shown) arranged in an array.
  • a planar adhesive layer is disposed above the groove, and the molding die 20 is heated to soften the curved adhesive layer 30, and the vacuum hole is opened to vacuum the groove 41, thereby being The softened curved adhesive layer on the groove gradually conforms to the conforming curved surface 42 under vacuum negative pressure, thereby obtaining the curved adhesive layer 30 having a certain curvature.
  • the curved adhesive layer 30 is released.
  • the curvature of the cavity 41 is the same as the curvature of the curved adhesive layer 30, thereby obtaining the curved adhesive layer 30 having a certain curvature.
  • the temperature rise temperature of the molding die 40 is controlled to be 80°-100°, thereby ensuring that the adhesive film is sufficiently thermally deformed without flow due to high-temperature micro-melting, and the thickness of the obtained curved adhesive layer 30 is ensured to be the same at each position.
  • the vacuum negative pressure forming mold 40 is made of stainless steel so that the curved adhesive layer 30 is easily released from the mold.
  • Step 130 The at least one surface functional layer, the adhesive layer 30, and the curved cover 13 are sequentially stacked in a cavity of the mold.
  • the curved functional layer and the curved cover 13 are spaced apart by the curved adhesive layer 30, and the curved adhesive layer 30, the curved cover 13 and the at least one curved functional layer
  • the first surface and the second surface of the curved adhesive layer 30 are respectively adhered to the curved functional layer and the curved cover 13 , that is, the curvature of the first surface of the curved adhesive layer is
  • the curvature of the curved functional layer is the same, and the curvature of the second surface is the same as the curvature of the curved cover 13 such that the curved adhesive layer 30 bonds the curved functional layer and the curved cover 13
  • problems such as separation and dislocation of the laminated structure are avoided.
  • the curved touch layer 11 is disposed on the bonding curved surface 42 of the hot press molding die 20 , the curved adhesive layer 30 , the curved polarizing layer 12 , and the adhesive layer. 30.
  • the curved surface protection casing 13 is sequentially laminated on the curved touch layer 11.
  • the curved protective casing 13 is built in the cavity 41 of the vacuum negative pressure forming mold 40 and is adhered to the bonding curved surface 42 .
  • the curved adhesive layer 30, the curved polarizing layer 12, the adhesive layer 30, and the curved touch layer 11 are sequentially laminated on the curved protective casing 13.
  • Step 140 integrally heating and holding the curved adhesion layer 30, the curved cover 13 and the at least one curved functional layer which are laminated and disposed by the mold, so that the surface of the curved adhesive layer 30 is partially Melting so that the curved cover 13 and the curved functional layer are bonded together by the curved adhesive layer 30.
  • the curved adhesion layer 30, the curved cover 13 and the at least one curved functional layer which are laminated on the mold are integrally heated and insulated.
  • the surface of the curved adhesive layer 30 is partially melted by controlling the heating temperature and the holding time. At this time, the curved adhesive layer 30 has adhesiveness, so that the curved functional layers on both sides of the curved adhesive layer 30 can be bonded together. Also, since only the surface portion of the curved adhesive layer 30 is partially melted, that is, the curved adhesive layer 30 is not completely melted into a liquid state. Therefore, the fluidity of the curved adhesive layer 30 is weak, so that the problem of uneven thickness at different positions of the curved adhesive layer 30 does not occur, and the occurrence of defects such as a bonding gap and bubbles is avoided.
  • the curved adhesion layer 30, the curved cover 13 and the at least one curved functional layer which are laminated and disposed are subjected to overall vacuum pressure defoaming treatment by the mold 21, so that the layers are The bubble exclusion between the two further ensures the quality of the curved touch screen 100.
  • the curved adhesion layer 30, the curved cover 13 and the at least one curved functional layer are laminated and heated to 120° and insulated for 5-10 minutes to achieve the surface sticking. The surface of the layer 30 is partially melted so that the curved adhesive layer has adhesive properties and surface microfluidity.
  • Step 150 After the curved cover plate 13 and the curved functional layer are cooled together, they are taken out from the cavity of the mold. After the curved cover sheet 13 bonded together and the curved functional layer are cooled, the curved adhesive layer 30 is cured, and the layer structures on both sides thereof are bonded together to form an integral body.
  • the curved touch panel 100 is obtained by taking out the curved cover 13 and the curved functional layer which are bonded together and then taking out the cavity of the mold.
  • the curved cover 13 having a certain curvature, the at least one curved functional layer and the curved adhesive layer 30 are first prepared, and then the curved cover is The plate 13, the at least one curved functional layer and the curved adhesive layer 30 are laminated in the mold, and the first surface and the second surface of the curved adhesive layer 30 are respectively associated with the curved functional layer And the curved cover 13 is attached.
  • the curved adhesion layer 30, the curved cover 13 and the at least one curved functional layer which are laminated are further heated and insulated by the mold.
  • the curved adhesive layer 30 is softened and the surface is partially melted, so that the curved cover 13 is bonded to the curved functional layer, thereby obtaining the curved touch screen 100.
  • the first surface and the second surface of the curved adhesive layer 30 are respectively attached to the curved functional layer and the curved cover 13, so that the curved cover 13 and the at least one surface function are There is no stress between the layer-equivalent structure and the curved surface bonding layer 30, and there is no problem such as separation or misalignment of the laminated structure.
  • the curved adhesive layer 30 bonds the curved cover 13 and the at least one curved functional layer or the like, the curved adhesive layer 30 does not need to be further deformed by bending or the like, thereby The problem of wrinkles, bubbles, and the like is not caused by the bending, and the quality of the curved touch panel 100 is further ensured. And, by heating, the surface of the curved adhesive layer 30 is partially melted, that is, the curved adhesive layer 30 has only a certain fluidity on its surface, so that when the adjacent two layer structures are bonded, the curved surface The adhesive layer 30 does not flow on the surface of the layer structure as in the prior art liquid glue, ensuring the same thickness of each position of the curved adhesive layer 30, and ensuring the quality of the curved touch screen 100. It can be understood that the manufacturing method of the curved touch screen 100 of the present invention is not limited to the fabrication of the curved touch screen 100, and can also be used to fabricate other curved layer structure bonding structures through an adhesive layer.

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  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
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Abstract

一种曲面触控屏的制作方法，通过将曲面盖板(13)、至少一层曲面功能层及粘合层(30)层叠于模具(20)内，并通过模具(20)对层叠设置的所述曲面粘合层(30)、曲面盖板(13)及至少一层曲面功能层进行整体加热并保温，使得所述曲面粘合层(30)表面部分熔融，以使所述曲面盖板(13)与所述曲面功能层粘合在一起，从而得到所述曲面触控屏。所述曲面粘合层(30)的相对两个表面分别与所述曲面功能层及所述曲面盖板(13)贴合，使得所述曲面盖板(13)及所述至少一层曲面功能层等层结构与所述曲面粘合层(30)之间不会产生应力作用，避免出现叠层结构分离、错位等问题。并且，通过加热以使得所述曲面粘合层(30)表面部分熔融，使得所述曲面粘合层(30)不会在所述层结构表面会进行流动，保证所述曲面触控屏的品质。

Description

曲面触控屏制作方法 技术领域
本发明涉及显示技术领域，尤其涉及一种曲面触控屏制作方法。
背景技术
随着显示技术的发展，曲面触控显示器越来越多，曲面显示器一般都是在柔性的显示面板上覆盖曲面触摸屏，从而实现所述曲面触控显示器的触控。曲面触控屏一般包括弯曲的层叠设置的多层结构。例如，所述层结构可以包括触控层、保护盖板、光学膜层等。制作所述曲面触控屏时，需要将各层结构通过胶层进行粘合在一起。
现有技术中，将弯曲的各个层结构进行粘合的方式主要为：将液体粘胶将两层层结构进行粘合，再将所述液体粘胶进行固化。但是，对于半球形曲面等曲面曲率较大的层结构，所述液体粘胶在所述层结构表面会进行流动，最终导致固化后胶层厚度不一，出现贴合间隙、气泡等不良。或者，将平面的层结构通过胶层进行粘合，再通过3D成型方式，以得到曲面触控屏。但是，由于所述层结构常为固体膜层，所述胶层一般为柔性材料，容易层结构与胶层之间应力不一、变形不一，容易出现叠层结构分离、错位等不良，从而影响所述曲面触控屏的质量。
发明内容
本发明提供一种曲面触控屏制作方法，使得各层结构之间具有较好的贴合效果，避免出现间隙、气泡等问题，保证所述曲面触控屏的质量。
所述曲面触控屏制作方法包括步骤：
提供一个曲面盖板及至少一层曲面功能层；
提供至少一个曲面粘合层，所述曲面粘合层常温下为无粘性的固态，加热熔融后具有粘性；
将所述至少一层曲面功能层、粘合层及所述曲面盖板依次层叠设置于模具的腔体内；所述曲面功能层与所述曲面盖板之间通过所述曲面粘合层间隔开， 且所述曲面粘合层、所述曲面盖板及所述至少一层曲面功能层的弯曲方向相同，所述曲面粘合层的相对的两个表面分别与所述曲面功能层及所述曲面盖板贴合；
通过所述模具对层叠设置的所述曲面粘合层、所述曲面盖板及所述至少一层曲面功能层进行整体加热并保温，使得所述曲面粘合层表面部分熔融，以使得所述曲面盖板与所述曲面功能层通过所述曲面粘合层粘合在一起；
将粘合在一起的所述曲面盖板与所述曲面功能层冷却后从所述模具的腔体中取出。
其中，所述曲面盖板与所述至少一层曲面功能层的曲率相同。
其中，所述曲面粘合层与所述曲面盖板的曲率相同。
其中，所述至少一层曲面功能层包括曲面触控层或曲面偏光层。
其中，所述至少一层曲面功能层包括层叠设置的曲面触控层及曲面偏光层，所述曲面触控层与曲面偏光层之间也通过一层所述曲面粘合层间隔开。
其中，所述曲面触控层包括曲面衬底及设于所述曲面衬底上的图案化的触控电路层；通过热压成型或者真空负压成型得到所述曲面衬底；通过图案化工艺在所述曲面衬底上形成图案化的触控电路层。
其中，所述曲面触控屏制作方法还包括：
对层叠设置的所述曲面粘合层、所述曲面盖板及所述至少一层曲面功能层进行整体真空加压脱泡处理，以排除各层之间的气泡。
其中，所述曲面粘合层为薄膜类胶材，其受热变形温度80°-130°。
其中，所述曲面粘合层包括PU透明薄膜、热熔胶膜或EVA透明薄膜中任意一种，所述曲面粘合层的厚度为50-150um。
其中，对层叠设置的所述曲面粘合层、所述曲面盖板及所述至少一层曲面功能层进行整体加热至120°并保温5-10min。
其中，通过热压成型或者真空负压成型工艺得到所述曲面粘合层。
其中，所述模具为热压成型模具或者真空负压成型模具。
其中，所述热压成型或者所述真空负压成型模具均为不锈钢模具。
其中，所述腔体的曲率与所述曲面盖板的曲率相同。
本发明所述曲面触控屏的制作方法，先提供具有一定曲率的所述曲面盖 板、所述至少一层曲面功能层及所述曲面粘合层，并通过将所述曲面盖板、所述至少一层曲面功能层及所述曲面粘合层层叠于模具内，并通过模具对层叠设置的所述曲面粘合层、所述曲面盖板及所述至少一层曲面功能层进行整体加热并保温，使得所述曲面粘合层软化并部分熔融，使得所述曲面盖板与所述曲面功能层粘合在一起，从而得到所述曲面触控屏。其中，由于所述曲面粘合层的第一表面及第二表面分别与所述曲面功能层及所述曲面盖板贴合，使得所述曲面盖板及所述至少一层曲面功能层等层结构与所述曲面粘合层之间不会产生应力作用，不会出现叠层结构分离、错位等不良现象。并且，通过加热以使得所述曲面粘合层表面部分熔融，即所述曲面粘合层仅其表面具有一定的流动性，使得在粘合相邻的两个层结构时，所述曲面粘合层不会如现有技术的液体粘胶一样在所述层结构表面会进行流动，从而保证所述曲面触控屏的品质。
附图说明
为了更清楚地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地介绍，显而易见地，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他的附图。
图1为本发明曲面触控屏制作方法流程图；
图2是本发明曲面触控屏制作方法一实施例使用的热压模具示意图；
图3是本发明曲面触控屏制作方法另一实施例使用的热压模具示意图；
图4-图8为本发明一实施方式的曲面触控屏制作方法各步骤示意图；
图9-图11为本发明另一实施方式的曲面触控屏制作方法各步骤示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，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，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
请参阅图1及图8，本发明提供一种曲面触控屏100的制作方法，以得到 一种品质较好的所述曲面触控屏100。具体的，当所述曲面触控屏100的曲率较大时，所述曲面触控屏100仍具有较好的品质。本实施例中，以所述曲面触控屏为半球形的曲面结构为例进行说明。所述曲面触控屏100的制作方法具体包括：
步骤110：提供一个曲面盖板13及至少一层曲面功能层。
本发明中，所述曲面触控屏100的所述曲面触控屏100包括多个层叠设置的层结构，相邻的两个层结构贴合固定在一起。本发明实施例中，所述层结构包括曲面盖板13及至少一个曲面功能层，通过所述曲面盖板13对所述曲面功能层进行保护，所述曲面盖板13及所述至少一个曲面功能层均为弯曲的曲面结构。并且，本实施例中，所述曲面盖板13及所述至少一层曲面功能层的曲率相同。可以理解的是，在本发明的其它实施例中，所述曲面盖板13及所述至少一层曲面功能层的曲率也可以不同。
所述曲面盖板13可以为玻璃、塑料或者蓝宝石等材质。根据所述曲面盖板13材质的不同，形成所述曲面盖板13的加工方式不同。本实施例中，得到的所述曲面盖板13的曲率与所述曲面触控屏100的曲率相同。
所述至少一层曲面功能层可以包括触控层、偏光层等功能层，也可以包括减反射层等光学膜层，且所述触控层。本实施例中，所述曲面功能层为两层，分别为曲面触控层11及层叠于所述曲面触控层11上的偏光层12，且所述偏光层12位于所述曲面触控层11及所述曲面盖板13之间。本实施例中，分别提供一个与所述曲面盖板曲率相同的一个所述曲面触控层11及一个所述曲面偏光层12。具体的，通过热压成型或者真空负压等方式使偏光层弯曲，从而形成所述曲面偏光层12。所述曲面触控层11包括曲面衬底及设于所述曲面衬底上的图案化的触控电路层。所述曲面衬底可以为玻璃衬底或者塑料衬底。根据所述衬底的材料不同，可以通过不同的成型方式得到具有与所述曲面盖板13相同曲率的曲面衬底，再通过图案化工艺在所述曲面衬底上形成图案化的触控电路层。所述触控电路层朝向所述曲面盖板一侧。
步骤120：提供至少一个曲面粘合层30。
本发明中，所述曲面粘合层30为与所述曲面盖板13曲率相同的曲面结构。所述曲面粘合层30常温下为无粘性的固态，加热熔融后具有粘性，从而能够 将相邻的两个层结构粘合在一起。本实施例中，所述曲面粘合层30为透明的薄膜类胶材，其受热变形温度80°-130°。具体的，所述曲面粘合层30可以为PU透明薄膜、热熔胶膜或EVA透明薄膜等透明薄膜材料中任意一种。并且，本发明中，所述曲面粘合层30的厚度为50-150um，以避免所述曲面粘合层30过薄而不能牢固的粘合相邻的两个层结构；同时，也能够避免所述曲面粘合层30过厚而影响所述曲面触控层100的厚度。所述曲面粘合层30可以通过热压成型或者真空负压的成型方式形成其曲面结构。具体的，请参阅图2及图4至图6，本实施例中，通过热压成型的方式得到所述曲面粘合层30。具体的，提供一热压成型模具20。所述热压成型模具20包括上模及下模，所述上模上设有一凹槽，所述下模上设有与所述凹槽相对应的凸起。所述上模与所述下模对合后形成一腔体21，所述腔体21的形状大小与需要得到的所述曲面粘合层30的形状大小相同。所述曲面粘合层30形成于所述腔体21内。本实施例中，所述腔体21的曲率与所述曲面粘合层30的曲率相同，从而得到一定曲率的所述曲面粘合层30。具体的，将平面的粘合层设置于所述凸起的贴合曲面22上，并使得所述热压成型模具20升温至所述曲面粘合层30软化。同时，逐渐将所述上模与所述下模进行压合，从而对所述曲面粘合层30施加压力，最终使得所述曲面粘合层30完全贴附与所述贴合曲面22上，从而得到具有一定曲率的所述曲面粘合层30。最后，在所述曲面粘合层30冷却固化后，将所述曲面粘合层30脱模。其中，所述曲面粘合层30包括相对的两个表面，分别为第一表面及与所述第一表面相对的第二表面。所述第一表面与所述上膜凹槽的槽壁的曲率相同，所述第二表面与所述下模凸起的表面曲率相同。本实施例中，所述第一表面与所述第二表面的曲率均与所述曲面盖板13曲率相同，即所述曲面粘合层30与所述曲面盖板13的曲率相同。进一步的，本实施例中，所述热压成型模具20升温温度控制在80°-100°，从而保证粘合膜材足够热变形而不会因高温微熔化而产生流动，保证得到的所述曲面粘合层30各个位置的厚度相同。进一步的，本实施例中，所述成型模具20为不锈钢材质，使得所述曲面粘合层30易于脱模。
请参阅图3及图9至图10，本发明另一实施例中，通过真空负压成型的方式得到所述曲面粘合层30。具体的，提供一真空负压成型模具40。所述真 空负压成型模具40包括一凹槽41，所述凹槽41包括一贴合曲面42。所述贴合曲面42上设有阵列设置的多个真空孔(图中未示出)。将平面的粘合层设置于所述凹槽上方，将所述成型模具20升温至所述曲面粘合层30软化，开启所述真空孔对所述凹槽41内吸真空，从而使得设于所述凹槽上的软化的所述曲面粘合层在真空负压的作用下逐渐与所述贴合曲面42贴合，从而得到具有一定曲率的所述曲面粘合层30。最后，在所述曲面粘合层30冷却固化后，将所述曲面粘合层30脱模。同样的，本实施例中，所述腔体41的曲率与所述曲面粘合层30的曲率相同，从而得到一定曲率的所述曲面粘合层30。所述成型模具40升温温度控制在80°-100°，从而保证粘合膜材足够热变形而不会因高温微熔化而产生流动，保证得到的所述曲面粘合层30各个位置的厚度相同。所述真空负压成型模具40为不锈钢材质，使得所述曲面粘合层30易于脱模。
步骤130：将所述至少一层曲面功能层、粘合层30及所述曲面盖板13依次层叠设置于模具的腔体内。所述曲面功能层与所述曲面盖板13之间通过所述曲面粘合层30间隔开，且所述曲面粘合层30、所述曲面盖板13及所述至少一层曲面功能层的弯曲方向相同，所述曲面粘合层30的第一表面及第二表面分别与所述曲面功能层及所述曲面盖板13贴合，即所述曲面粘合层的第一表面的曲率与所述曲面功能层的曲率相同，所述第二表面的曲率与所述曲面盖板13的曲率相同，从而使得所述曲面粘合层30粘合所述曲面功能层及所述曲面盖板13时，所述曲面粘合层30与所述曲面功能层及所述曲面盖板13之间不会产生应力作用，避免出现叠层结构分离、错位等问题。请参阅图7，本实施例中，所述曲面触控层11盖设于所述热压成型模具20的贴合曲面42上，所述曲面粘合层30、曲面偏光层12、粘合层30、曲面保护壳体13依次层叠于所述曲面触控层11上。请参阅图11，本发明另一实施例中，所述曲面保护壳体13内置于所述真空负压成型模具40的腔体41内，并与所述贴合曲面42贴合。所述曲面粘合层30、曲面偏光层12、粘合层30、曲面触控层11依次层叠于曲面保护壳体13上。
步骤140：通过所述模具对层叠设置的所述曲面粘合层30、所述曲面盖板13及所述至少一层曲面功能层进行整体加热并保温，使得所述曲面粘合层30表面部分熔融，以使得所述曲面盖板13与所述曲面功能层通过所述曲面粘合 层30粘合在一起。
通过对所述模具对层叠设置的所述曲面粘合层30、所述曲面盖板13及所述至少一层曲面功能层进行整体进行加热并保温。通过控制加热温度及保温时间，使得所述曲面粘合层30表面部分熔融。此时，所述曲面粘合层30具有粘合性，从而能够将所述曲面粘合层30两侧的所述曲面功能层粘合在一起。并且，由于仅使得所述曲面粘合层30的表面部分熔融，即所述曲面粘合层30未完全熔融为液态。因而，所述曲面粘合层30的流动性较弱，从而不会产生所述曲面粘合层30不同位置厚度不均的问题，避免贴合间隙、气泡等不良的出现。进一步的，通过所述模具21对所述层叠设置的所述曲面粘合层30、所述曲面盖板13及所述至少一层曲面功能层进行整体真空加压脱泡处理，使得各层之间的气泡排除，进一步保证所述曲面触控屏100的品质。本实施例中，对层叠设置的所述曲面粘合层30、所述曲面盖板13及所述至少一层曲面功能层进行整体进行加热至120°并保温5-10min，实现所述曲面粘合层30表面部分熔融，使得所述曲面粘合层具有粘合性能及表面微量流动性。
步骤150：将粘合在一起的所述曲面盖板13与所述曲面功能层冷却后从所述模具的腔体中取出。粘合在一起的所述曲面盖板13与所述曲面功能层冷却后，所述曲面粘合层30固化，并将其两侧的层结构粘合在一起形成一体。将粘合在一起的所述曲面盖板13与所述曲面功能层冷却后从所述模具的腔体中取出即得到所述曲面触控层100。
本发明所述曲面触控屏100的制作方法，通过先制作得到具有一定的曲率的曲面盖板13、所述至少一层曲面功能层及所述曲面粘合层30，再将所述曲面盖板13、所述至少一层曲面功能层及所述曲面粘合层30层叠于所述模具内，并使得所述曲面粘合层30的第一表面及第二表面分别与所述曲面功能层及所述曲面盖板13贴合。再通过所述模具对层叠设置的所述曲面粘合层30、所述曲面盖板13及所述至少一层曲面功能层进行整体加热并保温。通过控制加热温度及保温时间，使得所述曲面粘合层30软化且表面部分熔融，使得所述曲面盖板13与所述曲面功能层粘合在一起，从而得到所述曲面触控屏100。其中，由于所述曲面粘合层30的第一表面及第二表面分别与所述曲面功能层及所述曲面盖板13贴合，使得所述曲面盖板13及所述至少一层曲面功能层等层 结构与所述曲面粘合层30之间不会产生应力作用，不会出现叠层结构分离、错位等不良现象。并且，在所述曲面粘合层30对所述曲面盖板13及所述至少一层曲面功能层等层结构进行粘合时，所述曲面粘合层30不需要进一步进行弯曲等变形，从而不会由于弯曲而产生褶皱、气泡等问题，进一步保证所述曲面触控屏100的品质。并且，通过加热以使得所述曲面粘合层30表面部分熔融，即所述曲面粘合层30仅其表面具有一定的流动性，使得在粘合相邻的两个层结构时，所述曲面粘合层30不会如现有技术的液体粘胶一样在所述层结构表面会进行流动，保证所述曲面粘合层30各个位置的厚度相同，保证所述曲面触控屏100的品质。可以理解的是，本发明所述曲面触控屏100的制作方法不限于制作所述曲面触控屏100，还可以用于制作其它的通过粘合层将多个曲面层结构粘合结构中。
以上所揭露的仅为本发明一种较佳实施例而已，当然不能以此来限定本发明之权利范围，本领域普通技术人员可以理解实现上述实施例的全部或部分流程，并依本发明权利要求所作的等同变化，仍属于发明所涵盖的范围。

Claims (14)

  1. 一种曲面触控屏制作方法，其特征在于，包括步骤：
    提供一个曲面盖板及至少一层曲面功能层；
    提供至少一个曲面粘合层，所述曲面粘合层常温下为无粘性的固态，加热熔融后具有粘性；
    将所述至少一层曲面功能层、粘合层及所述曲面盖板依次层叠设置于模具的腔体内；所述曲面粘合层、所述曲面盖板及所述至少一层曲面功能层的弯曲方向相同，所述曲面粘合层的相对的两个表面分别与所述曲面功能层及所述曲面盖板贴合；
    通过所述模具对层叠设置的所述曲面粘合层、所述曲面盖板及所述至少一层曲面功能层进行整体加热并保温，使得所述曲面粘合层表面部分熔融，以使得所述曲面盖板与所述曲面功能层通过所述曲面粘合层粘合在一起；
    将粘合在一起的所述曲面盖板与所述曲面功能层冷却后从所述模具的腔体中取出。
  2. 如权利要求1所述的曲面触控屏制作方法，其特征在于，所述曲面盖板与所述至少一层曲面功能层的曲率相同。
  3. 如权利要求2所述的曲面触控屏制作方法，其特征在于，所述曲面粘合层与所述曲面盖板的曲率相同。
  4. 如权利要求1所述的曲面触控屏制作方法，其特征在于，所述至少一层曲面功能层包括曲面触控层或曲面偏光层。
  5. 如权利要求1所述的曲面触控屏制作方法，其特征在于，所述至少一层曲面功能层包括层叠设置的曲面触控层及曲面偏光层，所述曲面触控层与曲面偏光层之间也通过一层所述曲面粘合层间隔开。
  6. 如权利要求5所述的曲面触控屏制作方法，其特征在于，所述曲面触控层包括曲面衬底及设于所述曲面衬底上的图案化的触控电路层；通过热压成型或者真空负压成型得到所述曲面衬底；通过图案化工艺在所述曲面衬底上形成图案化的触控电路层。
  7. 如权利要求1所述的曲面触控屏制作方法，其特征在于，所述曲面触 控屏制作方法还包括：
    对层叠设置的所述曲面粘合层、所述曲面盖板及所述至少一层曲面功能层进行整体真空加压脱泡处理，以排除各层之间的气泡。
  8. 如权利要求1所述的曲面触控屏制作方法，其特征在于，所述曲面粘合层为薄膜类胶材，其受热变形温度80°-130°。
  9. 如权利要求8所述的曲面触控屏制作方法，其特征在于，所述曲面粘合层包括PU透明薄膜、热熔胶膜或EVA透明薄膜中任意一种，所述曲面粘合层的厚度为50-150um。
  10. 如权利要求1所述的曲面触控屏制作方法，其特征在于，对层叠设置的所述曲面粘合层、所述曲面盖板及所述至少一层曲面功能层进行整体加热至120°并保温5-10min。
  11. 如权利要求1所述的曲面触控屏制作方法，其特征在于，通过热压成型或者真空负压成型工艺得到所述曲面粘合层。
  12. 如权利要求1所述的曲面触控屏制作方法，其特征在于，所述模具为热压成型模具或者真空负压成型模具。
  13. 如权利要求12所述的曲面触控屏制作方法，其特征在于，所述热压成型或者所述真空负压成型模具均为不锈钢模具。
  14. 如权利要求1所述的曲面触控屏制作方法，其特征在于，所述腔体的曲率与所述曲面盖板的曲率相同。
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