WO2013044584A1 - 一种电容式触摸屏结构 - Google Patents

一种电容式触摸屏结构 Download PDF

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Publication number
WO2013044584A1
WO2013044584A1 PCT/CN2012/000720 CN2012000720W WO2013044584A1 WO 2013044584 A1 WO2013044584 A1 WO 2013044584A1 CN 2012000720 W CN2012000720 W CN 2012000720W WO 2013044584 A1 WO2013044584 A1 WO 2013044584A1
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Prior art keywords
touch screen
layer
substrate
capacitive touch
capacitive
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PCT/CN2012/000720
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English (en)
French (fr)
Inventor
杜秀兰
黄良杰
陈伟
张家发
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苏州合美硕触控技术有限公司
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Publication of WO2013044584A1 publication Critical patent/WO2013044584A1/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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes

Definitions

  • the present invention relates to a capacitive touch screen, and more particularly to a structurally refined capacitive touch screen.
  • a touch screen is a simple, convenient, and natural human-computer interaction device that has been widely used in various places.
  • touch screens which are mainly divided into resistive, capacitive, infrared and surface acoustic waves.
  • the capacitive touch screen is a coordinate of the touched position of the detector by using an induced current generated by a change in capacitance generated by electrostatic coupling between the electrode on the glass substrate and the human body.
  • the principle of induction uses voltage to act on the four corners of the screen sensing area and form a fixed electric field. When the finger touches the screen, the electric field can induce current.
  • the controller the contact can be calculated according to the difference of the four corners of the current. position.
  • the capacitive touch screen bottle body structure is composed of two layers, three or more layers of substrate materials, and then connected to the IC through a flexible circuit board, and the uppermost substrate material is used as a decorative cover of the capacitive touch screen.
  • the lower layer or two layers of the substrate are used as the sensor portion of the capacitive touch screen, and the surface of the substrate is provided with a conductive film layer as a capacitive sensor circuit and a metal wire as a lead, which is made of glass, tempered glass or PET film;
  • the bottom layer of the substrate is a capacitive touch screen protective layer with a conductive film on the surface of the substrate and made of PET film.
  • the layers of the substrate are bonded together with a pressure sensitive adhesive (PSA) or an optical adhesive (OCA).
  • PSA pressure sensitive adhesive
  • OCA optical adhesive
  • FIG. 1 and FIG. 1a an example of a two-layer structure is shown in which the upper cover plate is a glass substrate 11, a lower sensor glass 1 or a sensor film 12 (the former is selected in the present example), and a pressure-sensitive adhesive is used in the middle.
  • Agent 2 (PSA) bonding As shown in FIG. 1 and FIG. 1a, an example of a two-layer structure is shown in which the upper cover plate is a glass substrate 11, a lower sensor glass 1 or a sensor film 12 (the former is selected in the present example), and a pressure-sensitive adhesive is used in the middle. Agent 2 (PSA) bonding.
  • PSA Agent 2
  • an example of a three-layer structure is formed by combining an upper cover of a glass substrate 11 and two layers of sensor films 12, and optical bonding 3 (OCA) is used between the two.
  • OCA optical bonding 3
  • an example of a four-layer structure is formed by combining an upper cover of a glass substrate 11, a two-layer sensor film 12, and a protective film of a glass substrate 11.
  • Optical bonding (OCA) is used between the two.
  • the capacitive sensor circuit conductive film layer 4 is respectively integrated in the sensor film 12, and the capacitive touch screen is connected to the IC through the flexible circuit board 5, but has the following drawbacks:
  • the object of the present invention is to propose a novel capacitive touch screen structure, which opens up new ideas and feasible solutions for the application of the touch screen in human-computer interaction equipment.
  • the object of the present invention will be achieved by the following technical solutions:
  • a capacitive touch screen structure is characterized in that: the capacitive touch screen has one and only one substrate, and the lower surface of the substrate facing away from the touch surface thereof is sequentially integrated with a conductive sensor circuit conductive film layer, silk screen decoration a pattern layer and a lead layer, the lead line layer passing through the silk screen decorative pattern layer and communicating with the capacitive sensor circuit conductive film layer 4, and connected to the IC through the flexible circuit board.
  • the substrate is glass, plexiglass or tempered glass.
  • the conductive film layer of the capacitive sensor circuit is a PET film, which is adhered to the substrate by an optical adhesive or a pressure sensitive adhesive.
  • the invention discloses the creation and implementation of the touch screen of the single-layer substrate structure, and the outstanding effects thereof are as follows: the amount of the substrate and the pressure sensitive adhesive can be greatly saved, the production process is reduced, the production cost of the product is effectively saved, and the current capacitive touch screen industry is promoted. It is more in line with the current requirements of low carbon environmental protection; at the same time, the thickness of the product is thinner, which is more convenient to meet the ultra-thin design requirements of human-computer interaction models.
  • FIG. 1 is a schematic diagram of a prior art touch screen structure.
  • Figure la is an enlarged schematic view of the sensor portion of Figure 1.
  • FIG. 2 is a schematic structural view of a touch screen in the prior art.
  • Figure 2a is an enlarged schematic view of the sensor portion of Figure 2.
  • FIG. 3 is a schematic structural view of a touch screen in the prior art.
  • Figure 3a is an enlarged schematic view of the sensor portion of Figure 3.
  • FIG. 4 is a schematic structural view of a single-layer touch screen of the present invention.
  • Figure 4a is an enlarged schematic view of the sensor portion of Figure 4.
  • DETAILED DESCRIPTION OF THE INVENTION In view of the fact that the existing capacitive touch screen generally adopts a multi-layer structure of two or more layers, the production process of the product is complicated, the finished product is thick, and it is not suitable for the ultra-thin design of human-computer interaction equipment.
  • the researcher of the present invention has devoted himself to researching the structural characteristics of the capacitive touch screen for many years, and has proposed a single-layer capacitive touch screen, which has opened up new ideas and feasible solutions for the application of the touch screen in the human-computer interaction device.
  • FIG. 4 and FIG. 4a it is different from the conventional conventional capacitive touch screen in that it has one and only one substrate, and the substrate faces away from The lower surface of the touch surface is sequentially integrated with a capacitive sensor circuit conductive film layer 4, a silk screen decorative pattern layer 6 and a lead wire layer 7, and the lead wire layer 7 passes through the silk screen decorative pattern layer 6 and the capacitive sensor circuit conductive film.
  • Layer 4 is in communication and is connected to the IC via a flexible circuit board 5.
  • the substrate may be selected from a glass substrate 11, or an organic glass, or a tempered glass; and one of the conductive film layers of the capacitive sensor circuit may be a PET film, or may be a technology in the field.
  • Other useful conductive films known to those skilled in the art are adhered to the substrate by optical glue or pressure sensitive adhesive.
  • the capacitive touch screen is processed on the glass substrate 11 to process the conductive film layer 4 of the capacitive sensor circuit, and then the silk screen decorative pattern layer is processed on the conductive film layer as a conductive film layer. Protection, then printing the lead layer 6, and connecting the lead layer 6 to the capacitive sensor circuit conductive film layer 4, and finally passing the lead layer 6 and the IC through the flexible circuit board 5. Connected. In this way, the finished product of the single-layer capacitive touch screen is realized.
  • the description of the process is intended to illustrate the layering sequence of the single-layer capacitive touch screen of the present invention, and the specific process is not developed. However, on the basis of the prior art, the researcher has successfully produced successful samples through practice and obtained better test results.
  • the touch screen of the single-layer substrate structure of the present invention is created and implemented, and the structural design integrating the appearance and the function has the following advantages.
  • Material cost is greatly reduced: At least 60% of raw material usage can be reduced. Taking a two-layer structure as an example, a layer of substrate and a pressure sensitive adhesive or optical glue are saved.
  • the optical adhesive is at least 0. 025mm
  • the thickness of the PET film is at least 0. 125mm
  • the optical adhesive is at least 0. 025mm
  • the thickness of the PET film is at least 0. 125mm
  • 5 ⁇ At least a total of 0. 15mm.
  • the traditional capacitive touch screen is processed separately for each layer structure, and it needs to be combined in two or two after processing.
  • the new invention is only required to be processed on a single-layer substrate, and the capacitance of the single-layer structure of the present invention is not required to be combined.
  • the touch screen structure promotes the current capacitive touch screen industry to meet the current requirements of low carbon environmental protection; at the same time, the thickness of the product is thinner, which is more convenient to meet the ultra-thin design requirements of human-computer interaction models.

Abstract

揭示了一种电容式触摸屏结构，该电容式触摸屏有且仅有一层基板，且该基板背向其触摸面的下表面顺次集成设有电容式传感器电路导电膜层，丝印装饰图案层及引出线层，该引出线层穿过丝印装饰图案层并与电容式传感器电路导电膜层相连通，而且通过柔性电路板与IC相连。该单层基板结构的触摸屏的创制并实施，其突出效果为：能够大幅节约基板及感压粘着剂的用量，并且减少生产工序，有效节省了产品的生产成本，促进了当前电容式触摸屏产业更符合当前低碳环保的要求；同时产品厚度变薄，更方便满足人机交互机型的超薄设计需求。

Description

一种电容式触摸屏结构 技术领域 本发明涉及一种电容式触摸屏， 尤其涉及一种结构精炼的电容式触摸屏。 背景技术 触摸屏是一种简单、 方便、 自然的人机交互设备， 其已被广泛应用在各种 场所。 触摸屏种类繁多， 按原理划分主要包括电阻式、 电容式、 红外式和表面 声波式。 其中电容式触摸屏是利用玻璃基板上的电极与人体之间的静电结合所 产生的电容变化所产生的诱导电流来检测器被触摸位置的坐标。 感应原理以电 压作用在屏幕感应区的四个角落并形成一个固定电场， 当手指碰屏幕时， 可使 电场引发电流， 借助控制器测定， 依电流四个角落比例的不同， 即可计算出接 触位置。
目前公知电容式触摸屏瓶体结构多采用两层， 三层或多层基板材料组合而 成， 然后通过柔性线路板与 IC 相连接， 最上面一层基板材料作为电容式触摸 屏的装饰盖板， 其背面丝印油墨和图案， 材质为玻璃， 钢化玻璃或 PET薄膜。 下面一层或两层基材作为电容式触摸屏的传感器 （sensor) 部分， 基材表面附 有作为电容式传感器电路导电膜层以及作为引线的金属导线， 其材质为玻璃， 钢化玻璃或 PET薄膜； 最下面一层基材为电容式触摸屏保护层， 基材表面附有 导电膜， 材质为 PET 薄膜。 各层基材之间用感压粘着剂 （PSA) 或光学胶 (OCA) 黏贴在一起。 以下便从多个图示， 了解现有技术电容式触摸屏的常见 结构及其构成。
如图 1和图 la所示是一种两层结构的实例， 其上层盖板是玻璃基材 11， 下层传感器玻璃 1 或者传感器薄膜 12 (本实例选用前者） 组合而成， 中间 使用感压粘着剂 2 (PSA) 粘合。
如图 2和图 2a所示是一种三层结构的实例， 其是由玻璃基材 11的上层盖 板与两层传感器薄膜 12组合而成， 两两之间使用光学胶 3 (OCA)粘合。 如图 3和图 3a所示是一种四层结构的实例， 其是由玻璃基材 11的上层盖 板、 两层传感器薄膜 12、 以及一层玻璃基材 11 的保护层薄膜组合而成， 两两 之间使用光学胶 （OCA)粘合。
以上介绍的现有技术多层结构中， 电容式传感器电路导电膜层 4分别复合 于传感器薄膜 12之中， 且电容式触摸屏均通过柔性电路板 5与 IC相连接， 但 其具有以下缺陷：
1 ) 材料成本高： 层数越多， 消耗的材料越多， 成本越高； 2) 成品厚度 厚， 无法满足客户超薄机型的设计需求； 3 ) 工艺路线复杂： 需经过多道组合 工序， 每多一道工序， 需要损耗人工且损失良率。 发明内容 鉴于上述现有技术存在的缺陷， 本发明的目的是提出一种新型的电容式触 摸屏结构， 为触摸屏在人机交互设备的应用开拓了新的思路和可行方案。 本发明的目的， 将通过以下技术方案得以实现：
一种电容式触摸屏结构， 其特征在于： 所述电容式触摸屏有且仅有一层基 板， 且所述基板背向其触摸面的下表面顺次集成设有电容式传感器电路导电膜 层， 丝印装饰图案层及引出线层， 所述引出线层穿过丝印装饰图案层并与电容 式传感器电路导电膜层 4相连通， 而且通过柔性电路板与 IC相连。
所述基板为玻璃， 有机玻璃或钢化玻璃。
所述电容式传感器电路导电膜层为 PET薄膜， 通过光学胶或感压粘着剂与 基板相粘连。 本发明单层基板结构的触摸屏的创制并实施， 其突出效果为： 能够大幅节 约基板及感压粘着剂的用量， 并且减少生产工序， 有效节省了产品的生产成 本， 促进了当前电容式触摸屏产业更符合当前低碳环保的要求； 同时产品厚度 的变薄， 更方便满足人机交互机型的超薄设计需求。
以下便结合实施例附图， 对本发明的具体实施方式作进一步的详述， 以使 本发明技术方案更易于理解、 掌握。 书 附图说明 图 1是现有技术一种触摸屏结构示意图。
图 la是图 1中传感器部分的放大示意图。
图 2是现有技术一种触摸屏结构示意图。
图 2a是图 2中传感器部分的放大示意图。
图 3是现有技术一种触摸屏结构示意图。
图 3a是图 3中传感器部分的放大示意图。
图 4是本发明单层触摸屏的结构示意图。
图 4a是图 4中传感器部分的放大示意图。 具体实施方式 鉴于现有电容式触摸屏普遍采用两层以上的多层结构， 导致产品生产工艺 复杂， 成品较厚， 不适应人机交互设备超薄化设计的要求。 本发明的研究者经 多年潜心研究电容式触摸屏的结构特征， 创新提出了一种单层结构的电容式触 摸屏， 为触摸屏在人机交互设备的应用开拓了新的思路和可行方案。
为实现上述目的， 本发明的技术解决方案概括来看主要如图 4和图 4a所 示： 其不同于现有常规电容式触摸屏的显著特征是其有且仅有一层基板， 且该 基板背向其触摸面的下表面顺次集成设有电容式传感器电路导电膜层 4， 丝印 装饰图案层 6及引出线层 7, 该引出线层 7穿过丝印装饰图案层 6与电容式传 感器电路导电膜层 4相连通， 且通过柔性电路板 5与 IC相连。 作为技术方案 可选的优化， 上述基板可选为玻璃基材 11， 或有机玻璃， 又或钢化玻璃等； 而 电容式传感器电路导电膜层可选之一为 PET薄膜， 也可以是本领域技术人员所 熟知的其它可用导电薄膜， 通过光学胶或感压粘着剂与基板相粘连。
从工艺角度简单来看： 该电容式触摸屏是现在玻璃基材 11 上加工处理好 电容式传感器电路导电膜层 4， 然后再在该导电膜层之上加工丝印装饰图案 层， 作为对导电膜层的保护， 再然后印刷引出线层 6， 并使引出线层 6与电容 式传感器电路导电膜层 4相连通， 最后通过柔性电路板 5将引出线层 6与 IC 相连。 这样便实现了单层结构的电容式触摸屏的成品制作。 本工艺说明旨在说 明本发明单层结构电容式触摸屏的分层顺序， 并未对其具体工艺进行展开。 但 在现有技术基础上， 研究者已通过实践试生产成功样品， 并取得较佳的测试效 果。
本发明单层基板结构的触摸屏的创制并实施， 其集外观与功能一体的结构 设计， 具备以下优势。
1 ) 材料成本大大减少： 可至少减少 60%的原材料使用量， 以两层结构为 例， 节约了一层基材以及感压粘着剂或光学胶。
2) 厚度变薄： 可至少降低 0. 15mm 以上， 以两层结构 （传感器部分使用 单层 PET薄膜基材制作） 为例， 一层 PET薄膜厚度至少 0. 125mm， 光学胶至 少 0. 025mm, 合计至少降低 0. 15mm。
3 ) 生产工序减少： 传统电容式触摸屏每层结构单独加工， 且加工后需两 两组合， 本新发明只要在单层基材上加工， 且无需组合工序 综合来看本发明单层结构的电容式触摸屏结构， 促进了当前电容式触摸屏 产业更符合当前低碳环保的要求； 同时产品厚度的变薄， 更方便满足人机交互 机型的超薄设计需求。

Claims

1. 一种电容式触摸屏结构， 其特征在于： 所述电容式触摸屏有且仅有一 层基板， 且所述基板背向其触摸面的下表面顺次集成设有电容式传感器电路导 电膜层， 丝印装饰图案层及引出线层， 所述引出线层穿过丝印装饰图案层并与 电容式传感器电路导电膜层相连通， 而且通过柔性电路板与 IC相连。
2. 根据权利要求 1 所述的一种电容式触摸屏结构， 其特征在于： 所述基 板为玻璃， 有机玻璃或钢化玻璃。
3. 根据权利要求 1 所述的一种电容式触摸屏结构， 其特征在于： 所述电 容式传感器电路导电膜层为 PET 薄膜， 通过光学胶或感压粘着剂与基板相粘 连。
PCT/CN2012/000720 2011-09-27 2012-05-24 一种电容式触摸屏结构 WO2013044584A1 (zh)

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