WO2017173739A1 - 一种电容式指纹识别触摸面板 - Google Patents

一种电容式指纹识别触摸面板 Download PDF

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Publication number
WO2017173739A1
WO2017173739A1 PCT/CN2016/087929 CN2016087929W WO2017173739A1 WO 2017173739 A1 WO2017173739 A1 WO 2017173739A1 CN 2016087929 W CN2016087929 W CN 2016087929W WO 2017173739 A1 WO2017173739 A1 WO 2017173739A1
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WIPO (PCT)
Prior art keywords
fingerprint recognition
capacitive fingerprint
circuit board
flexible circuit
touch panel
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PCT/CN2016/087929
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English (en)
French (fr)
Inventor
韩军红
王榕
宋洪刚
李明麟
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意力(广州)电子科技有限公司
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Application filed by 意力(广州)电子科技有限公司 filed Critical 意力(广州)电子科技有限公司
Publication of WO2017173739A1 publication Critical patent/WO2017173739A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1329—Protecting the fingerprint sensor against damage caused by the finger

Definitions

  • the invention relates to the technical field of manufacturing a touch panel, in particular to a capacitive fingerprint recognition touch panel.
  • the mainstream electronic product touch panels on the market are encrypted by means of digital or graphic passwords.
  • This method requires the user to keep in mind the pre-set password contents. Once the forgetting or memory deviation occurs, it is difficult to open the electronic products smoothly. There is also a risk that the password content will be cracked or leaked.
  • it has been proposed to encrypt with a human fingerprint. Human fingerprints are formed by the combination of genetics and environment. The content information carried by them is complex, unique and invariant. Therefore, fingerprint recognition is used as an encryption method for electronic products and has good security performance.
  • the existing fingerprint recognition technology mainly adopts optical recognition acquisition technology. After the finger touches the touch panel, the optical emitting device inside the touch panel emits light, hits the finger and then reflects back to the device to obtain relevant data, and then The database compares to determine whether the fingerprint is consistent with the fingerprint entered by the preset.
  • the drawback of this technique is that the optical recognition can only reach the epidermis layer of the skin and cannot reach the dermis layer, and the recognition effect is greatly affected by the cleanness of the finger surface, so that the success rate of single fingerprint recognition is low, and often requires more Sub-entry can correctly identify the fingerprint. It can be seen that it is necessary to develop a new fingerprint recognition touch panel to solve the above problems.
  • the invention provides a capacitive fingerprint recognition touch panel to solve the above problems, in view of the problems that the existing optical fingerprint recognition touch panel has low recognition success rate and high requirement for finger cleanness.
  • the technical solution adopted by the present invention is:
  • a capacitive fingerprint recognition touch panel includes a touch module and a capacitive fingerprint recognition module, wherein the capacitive fingerprint recognition module includes a capacitive fingerprint recognition chip, a flexible circuit board, a metal member, and a protective layer,
  • the upper surface of the first end of the flexible circuit board is electrically connected to the capacitive fingerprint identification chip, and the lower surface of the first end of the flexible circuit board is provided with a first reinforcing plate, and the upper surface of the second end of the flexible circuit board
  • the second reinforcing plate is provided with a connector, the connector is configured to electrically connect the flexible circuit board and the touch module; Covering an upper surface of the capacitive fingerprinting chip, the metal member is disposed on an upper surface of the first end of the flexible circuit board, the metal member is used for fixing the capacitive fingerprinting chip and the protective layer .
  • the metal member includes a torus body and a bonding body extending from an annular edge of one end of the toroidal body to the same plane, and the bonding body is attached to the first end of the flexible circuit board.
  • the capacitive fingerprinting chip and the protective layer are nested in the torus.
  • a bonding area is disposed on the upper surface of the first end of the flexible circuit board except the area occupied by the capacitive fingerprint identification chip, and the bonding body passes the conductive adhesive and the adhesive
  • the joint area is fixed and fixed.
  • a bonding area may be respectively disposed on the remaining four corner regions of the upper end surface of the flexible circuit board except the area occupied by the capacitive fingerprint identification chip, and correspondingly, The bonding body is simultaneously fixed to the four bonding regions by the conductive adhesive, thereby achieving a fixed connection between the bonding body and the upper surface of the first end of the flexible circuit board.
  • the capacitive fingerprint recognition touch panel further includes a glass panel located above the touch module, and the glass panel is divided into a visible area and a non-visible area, and is disposed in the non-visible area. An opening is provided for the capacitive fingerprint recognition module to be received in the opening.
  • the opening is any one of a circular opening, a square opening, and a rounded rectangular opening.
  • the protective layer is a cover plate, and the cover plate is adhered to the upper surface of the capacitive fingerprint identification chip by glue.
  • the cover plate has a thickness of 0.05-0.15 mm.
  • the thickness of the cover plate is 0.05-0.15 mm, which means any point value within the numerical range, for example, the thickness of the cover plate is 0.05 mm, 0.06 mm, 0.08 mm, 0.1 mm, 0.11 mm, 0.12 mm, 0.14mm or 0.15mm.
  • the cover has a thickness of 0.1 mm.
  • the cover is a ceramic cover or a sapphire cover.
  • the touch panel is used for a smart phone and/or a tablet computer, and the smart phone and/or the tablet computer is provided with a back cover, and the back cover is provided with a hole for making the capacitive fingerprint recognition mode The assembly is placed in the digging hole.
  • the protective layer is a plating film.
  • the thickness of the plating film is a, and the a satisfies: 0 ⁇ a "0.5 ⁇ m.
  • the thickness of the coating film “0.5 ⁇ m means any point value within the numerical range, for example, the thickness a of the plating film is 0.5 ⁇ m, 0.45 ⁇ m, 0.4 ⁇ m, 0.35 ⁇ m, 0.3 ⁇ m, 0.25 ⁇ m, 0.2 ⁇ m, 0.15 ⁇ m or 0.1 ⁇ m.
  • the thickness a of the coating film may range from 0 ⁇ a "0.35 ⁇ m.
  • the capacitive fingerprint recognition chip since the electronic signal emitted by the capacitive fingerprint recognition chip can pass through the epidermis layer of the finger to reach the dermis layer of the finger skin, the fingerprint pattern can be directly read, thereby greatly improving the success rate of fingerprint recognition and reducing the cleanness of the finger. Claim.
  • a reinforcing plate is provided to reinforce the connection between the flexible circuit board and other components. Improve the strength of the joints to facilitate the assembly of subsequent products.
  • FIG. 1 is a schematic plan view showing a planar structure of a capacitive fingerprint recognition touch panel according to Embodiment 2;
  • FIG. 2 is a perspective exploded view of a capacitive fingerprint recognition touch panel of Embodiment 2;
  • Figure 3 is an enlarged schematic view showing the structure of the portion A of Figure 2.
  • Figure 4 is a front elevational view of the structure of Part A of Figure 2;
  • Figure 5 is a side view of the combination of the structure of the portion A of Figure 2;
  • Figure 6 is a rear elevational view of the combination of the structure of the portion A of Figure 2;
  • FIG. 7 is a schematic plan view showing the structure of the fingerprint recognition module in the second embodiment when the fingerprint recognition module is disposed on the back cover of the smart phone;
  • FIG. 8 is a perspective exploded view showing the fingerprint recognition module of the second embodiment disposed on the back cover of the smart phone.
  • the above partial terms may be used to indicate other meanings in addition to the orientation or positional relationship, for example, the term “upper” may also be used to indicate a certain dependency or connection relationship in some cases.
  • the specific meaning of these terms in the present invention can be understood on a case-by-case basis.
  • installation should be understood broadly.
  • it may be a fixed connection, a detachable connection, or a one-piece construction; it may be a mechanical connection, or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, or it may be two devices, components or components. Internal communication.
  • the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
  • first means two or more.
  • the embodiment provides a capacitive fingerprint recognition touch panel, including a touch module and a capacitive fingerprint recognition module.
  • the capacitive fingerprint recognition module includes a capacitive fingerprint recognition chip, a flexible circuit board, a metal component, and a protective layer.
  • the upper surface of the first end of the flexible circuit board is electrically connected to the capacitive fingerprint identification chip, and the first surface of the first end of the flexible circuit board is provided with a first reinforcing plate, and the second of the flexible circuit board is a second reinforcing plate is disposed on the upper surface of the end, and a connector is disposed on the lower surface of the second end of the flexible circuit board, the connector is configured to electrically connect the flexible circuit board and the touch module;
  • the protective layer covers the upper surface of the capacitive fingerprinting chip, the metal member is disposed on an upper surface of the first end of the flexible circuit board, and the metal member is used for fixing the capacitive fingerprinting chip and the The protective layer.
  • the electronic signal emitted by the capacitive fingerprint recognition chip can pass through the skin layer of the finger to reach the dermis layer of the finger skin, and directly read the fingerprint pattern, thereby greatly improving the success rate of fingerprint recognition and reducing the requirement for the cleanness of the finger.
  • a reinforcing plate is provided to reinforce the connection between the flexible circuit board and other components. Improve the strength of the joints to facilitate the assembly of subsequent products.
  • the present embodiment provides a capacitive fingerprint recognition touch panel, which is used in a smart phone or a tablet computer.
  • the touch panel may include a touch module (not shown) and a capacitive type.
  • the fingerprint recognition module 1 and the glass panel 2 located above the touch module.
  • the glass panel 2 can be divided into a visible area 21 and a non-visible area 22, and an opening 23 can be provided in the non-visible area 22 for accommodating the capacitive fingerprint recognition module 1.
  • the opening 23 is a circular opening.
  • the opening 23 can also be configured as a square opening, a rounded rectangular opening, or the like, as long as the requirements of the capacitive fingerprint recognition module 1 are met, and the invention is not limited thereto.
  • the capacitive fingerprint recognition module 1 may include a capacitive fingerprint recognition chip 11 , a flexible circuit board 12 , a metal member 13 , and a cover plate 14 .
  • the upper surface of the first end of the flexible circuit board 12 is electrically connected to the capacitive fingerprinting chip 11; the cover 14 is used as a protective layer, and the thickness thereof is preferably 0.1 mm, and the cover 14 can be attached to the capacitive fingerprint by glue.
  • the upper surface of the chip 11 is identified; the metal member 13 may be disposed on the upper surface of the first end of the flexible circuit board 12, and the metal member 13 may be used to fix the capacitive fingerprint chip 11 and the cover 14. As shown in FIG. 3 and FIG.
  • the metal member 13 may include a toroidal body 131, and an annular edge from one end of the toroidal body 131 (ie, at the edge of one end of the ring in FIG. 3 substantially along the paper surface)
  • the conforming body 132 is formed by extending the same plane.
  • the ring body 131 is mainly used to nest the capacitive fingerprint chip 11 and the cover plate 14.
  • the bonding body 132 is mainly used for bonding the upper surface of the first end of the fixed flexible circuit board 12, specifically, the remaining area of the upper surface of the first end of the flexible circuit board 12 except the area occupied by the capacitive fingerprint identification chip 11.
  • a bonding area 121 may be disposed thereon, and the bonding body 132 may be adhered and fixed to the bonding area 121 by a conductive adhesive.
  • a bonding area 121 may be respectively disposed on the remaining four corner areas of the upper surface of the first end of the flexible circuit board 12 except the area occupied by the capacitive fingerprint identification chip 11.
  • the bonding body 132 can be simultaneously fixed and fixed to the four bonding regions 121 through the conductive adhesive, thereby achieving a fixed connection between the bonding body 132 and the upper surface of the first end of the flexible circuit board 12, thereby realizing the metal member 13 and The flexible circuit board 12 is fixed, and the capacitive fingerprint chip 11 and the cover 14 can be nested in the torus 131.
  • the metal member 13 also plays a conductive role in the process of fingerprint recognition.
  • the capacitive fingerprint recognition chip 11 is provided with a fingerprint recognition unit, and the fingerprint recognition unit includes a sensing electrode and a driving electrode. A detection gap is formed between the sensing electrode and the driving electrode to form a basic capacitor.
  • the capacitive coupling between the sensing electrode and the driving electrode is different depending on whether the fingerprint ridge or the fingerprint valley is located above the detection gap. change. From this, the pressed fingerprint ridge and the fingerprint valley are determined, and a fingerprint image is acquired.
  • the capacitive fingerprint recognition chip 11 further includes a feature extraction/matching module for comparing the collected fingerprint image with the fingerprint that has been previously recorded, thereby determining whether the two fingerprint images are from the same finger.
  • a metal member is disposed on the outer periphery of the capacitive fingerprint identification chip, and the connection between the metal member and the capacitive fingerprint recognition chip enables the human finger to realize the function of detecting the fingerprint by the capacitive fingerprint recognition chip by touching the metal member.
  • the cover plate since the cover plate is located above the capacitive fingerprint recognition chip, the touch and pressing operations of the user are often accepted.
  • the cover plate needs to achieve a certain strength and wear resistance, in this embodiment.
  • a sapphire glass cover or a black and white color ceramic cover is used as the protective layer of the capacitive fingerprint recognition chip.
  • a first reinforcing plate 16 may be disposed on a lower surface of the first end of the flexible circuit board 12 (on the right side of the flexible circuit board 12 in FIG. 5). That is, the first end of the flexible circuit board 12 and the capacitive fingerprint identification chip 11 are electrically connected between the capacitive fingerprint identification chip 11 and the first reinforcing plate 16, so that the flexible circuit board 12 and the capacitive fingerprint identification chip 11 are The strength between the joints increases.
  • the upper surface of the second end of the flexible circuit board 12 (the left side of the flexible circuit board 12 in FIG. 5) may be provided with the second reinforcing plate 17 and the lower surface of the second end of the flexible circuit board 12 (at In FIG. 5, the right side of the flexible circuit board 12 can be provided with a connector 18 for electrically connecting the flexible circuit board 12 to the touch module.
  • the fingerprint recognition module since the fingerprint recognition module is disposed in the opening of the glass panel, the fingerprint recognition module is disposed on the front side of the smartphone and/or the tablet. In fact, the fingerprint recognition module in this embodiment may also be disposed on the back of the smartphone and/or the tablet, that is, on the back cover of the smartphone and/or the back cover of the tablet. As shown in FIG. 7 and FIG. 8 , when the fingerprint recognition module 1 is disposed on the back cover 3 of the smart phone, the smart phone back cover 3 is provided with a digging hole 31 for accommodating the fingerprint recognition module 1 in the digging hole 31. in. At this time, the protective layer provided on the upper surface of the capacitive fingerprint chip 11 is replaced by the plating film 15 by the plating film 15.
  • the syrup having abrasion resistance and scratch resistance can be plated on the surface of the capacitive fingerprint chip by an evaporation or coating process to form a coating having a thickness of less than 35 ⁇ m as a protective layer, so that the coating has scratch resistance.
  • Flower performance protects the fingerprint recognition module, enabling fingerprint recognition on the back of smartphones and/or tablets. Since the thickness of the coating is much smaller than the thickness of the cover plate, the recognition distance of the fingerprint fingerprint chip for the fingerprint is reduced, which is more advantageous for the fingerprint recognition function.

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  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
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Abstract

一种电容式指纹识别触摸面板，包括触控模组和电容式指纹识别模组（1），电容式指纹识别模组（1）包括电容式指纹识别芯片（11）、柔性电路板（12）、金属件（13）及保护层（14），柔性电路板（12）的第一端上表面电性连接电容式指纹识别芯片（11），且第一端下表面设有第一补强板（16），柔性电路板（12）的第二端上表面设有第二补强板（17），且第二端下表面设有连接器（18），连接器（18）用于将柔性电路板（12）与触控模组电性连接；保护层（14）覆盖在电容式指纹识别芯片（11）上表面，金属件（13）设在柔性电路板（12）的第一端的上表面，金属件（13）用于固定电容式指纹识别芯片（11）和保护层（14）。所述电容式指纹识别触摸面板可以提高指纹识别成功率以及降低对手指干净程度的要求。

Description

一种电容式指纹识别触摸面板 技术领域
本发明涉及触摸面板的制造技术领域，具体是一种电容式指纹识别触摸面板。
背景技术
随着通信和电子信息技术的快速发展，智能手机和/或平板电脑等智能电子产品已成为人们日常生活的必备品。这些电子产品除了具备通话、短信、视频、娱乐等基本功能，通常还具有支付、转账、充值等交易功能，因此给人们的生活带来了极大地便利。但是与此同时，这些便捷的功能也存在一定安全隐患，这是因为这些功能的实现需要在电子产品上捆绑敏感的私人信息。一旦这些私人信息被泄露或者盗用，将给用户带来一定麻烦，甚至造成严重地损失。因此，如何设置电子产品的加密方式以保证产品的安全性是用户非常关注的问题。
目前市场上主流的电子产品触摸面板均采用数字或图形密码等方式加密，这种方式需要用户牢记预先设定好的密码内容，一旦遗忘或者记忆出现偏差，则难以顺利打开电子产品，此外这种方式也存在密码内容被破解或泄露的风险。为提高加密安全性，有人提出以人的指纹进行加密。人的指纹由遗传与环境共同作用而形成，其所携带的内容信息复杂，具有唯一性和不变性，因此采用指纹识别作为电子产品的加密方式，具有良好的安全性能。
现有的指纹识别技术主要是采用光学识别采集技术，手指触摸在触摸面板上之后，在触摸面板内部的光学发射装置会发射出光线，射到手指上再反射回设备以获取相关数据，然后在资料库中进行比对，判断指纹与预设录入的指纹是否一致。这种技术的弊端在于，光学识别只能到达皮肤的表皮层，不能到达真皮层，而且识别的效果受手指表面干净程度的影响较大，使得单次指纹识别的成功率较低，往往需要多次录入才能正确识别指纹。由此可见，实有必要研发一种新的指纹识别触摸面板来解决上述问题。
发明内容
本发明针对现有的光学指纹识别触摸面板存在识别成功率低且对手指干净程度要求较高等问题，研发一种电容式指纹识别触摸面板以解决上述问题。
为解决上述技术问题，本发明采用的技术方案是：
提供一种电容式指纹识别触摸面板，包括触控模组和电容式指纹识别模组，所述电容式指纹识别模组包括电容式指纹识别芯片、柔性电路板、金属件以及保护层，所述柔性电路板的第一端上表面电性连接所述电容式指纹识别芯片，所述柔性电路板的第一端下表面设有第一补强板，所述柔性电路板的第二端上表面设有第二补强板，所述柔性电路板的第二端下表面设有连接器，所述连接器用于将所述柔性电路板与所述触控模组电性连接；所述保护层覆盖在所述电容式指纹识别芯片上表面，所述金属件设在所述柔性电路板的第一端的上表面，所述金属件用于固定所述电容式指纹识别芯片和所述保护层。
进一步地，所述金属件包括圆环体以及从所述圆环体的一端圆环边缘向四周同一平面延伸形成的贴合体，所述贴合体贴合在所述柔性电路板的第一端上表面上，并且所述电容式指纹识别芯片和所述保护层嵌套在所述圆环体中。
进一步地，所述柔性电路板的第一端上表面上除被所述电容式指纹识别芯片占用的区域之外的其余区域上设有粘合区，所述贴合体通过导电胶与所述粘合区贴合固定。优选地，所述柔性电路板的第一端上表面上除被所述电容式指纹识别芯片占用的区域之外的其余四个角区域上可以分别设有一个粘合区，相应地，所述贴合体通过导电胶同时与这四个粘合区贴合固定，从而实现贴合体与所述柔性电路板的第一端上表面的固定连接。
进一步地，所述电容式指纹识别触摸面板还设有位于所述触控模组上方的玻璃面板，所述玻璃面板划分为可视区和非可视区，在所述非可视区内设有一开孔，使所述电容式指纹识别模组容置在所述开孔中。
进一步地，所述开孔为圆形开孔、正方形开孔、圆角矩形开孔中的任意一种。
进一步地，所述保护层为盖板，所述盖板通过胶水粘贴在所述电容式指纹识别芯片上表面。
进一步地，所述盖板的厚度为0.05-0.15mm。其中，所述盖板的厚度为0.05-0.15mm是指该数值范围内的任一点值，例如所述盖板的厚度为0.05mm、0.06mm、0.08mm、0.1mm、0.11mm、0.12mm、0.14mm或0.15mm。
优选地，所述盖板的厚度为0.1mm。
可选地，所述盖板为陶瓷盖板或蓝宝石盖板。
进一步地，所述触摸面板用于智能手机和/或平板电脑，所述智能手机和/或平板电脑设有背盖，在所述背盖上设有挖孔，使所述电容式指纹识别模组容置在所述挖孔中。
进一步地，所述保护层为镀膜。
进一步地，所述镀膜的厚度a，且所述a满足：0 < a《0.5μm。其中，所述镀膜的厚度《0.5μm是指该数值范围内的任一点值，例如所述镀膜的厚度a为0.5μm、0.45μm、0.4μm、0.35μm、0.3μm、0.25μm、0.2μm、0.15μm或0.1μm。
优选地，所述镀膜的厚度a的取值范围可以是：0 < a《0.35μm。
与现有技术相比，有益效果如下：
本发明中，由于电容式指纹识别芯片发出的电子信号可以穿过手指的表皮层，达到手指皮肤的真皮层，直接读取指纹图案，从而可以大大提高指纹识别成功率以及降低对手指干净程度的要求。另外，考虑到柔性电路板的结构特点，其柔韧性较强，不便与其他部件结构的组装，因此在本发明中设置了补强板，通过对柔性电路板与其它部件结构连接处进行补强，提高其连接处的强度，从而方便后续产品的组装。
附图说明
图1是实施例二电容式指纹识别触摸面板的平面结构示意图；
图2是实施例二电容式指纹识别触摸面板的立体分解示意图；
图3是图2中A部分结构的放大示意图。
图4是图2中A部分结构组合后的正视图；
图5是图2中A部分结构组合后的侧视图；
图6是图2中A部分结构组合后的后视图；
图7是实施例二中的指纹识别模组设置在智能手机背壳时的平面结构示意图；
图8是实施例二中的指纹识别模组设置在智能手机背壳时的立体分解示意图。
具体实施方式
在本发明中，术语"上"、"下"、"左"、"右"、"前"、"后"、"顶"、"底"、"内"、"外"、"中"、"竖直"、"水平"、"横向"、"纵向"等指示的方位或位置关系为基于附图所示的方位或位置关系，仅用于说明各部件或组成部分之间的相对位置关系，并不特别限定各部件或组成部分的具体安装方位。
并且，上述部分术语除了可以用于表示方位或位置关系以外，还可能用于表示其他含义，例如术语"上"在某些情况下也可能用于表示某种依附关系或连接关系。对于本领域普通技术人员而言，可以根据具体情况理解这些术语在本发明中的具体含义。
此外，术语"安装"、"设置"、"设有"、"连接"、"相连"应做广义理解。例如，可以是固定连接，可拆卸连接，或整体式构造；可以是机械连接，或电连接；可以是直接相连，或者是通过中间媒介间接相连，又或者是两个装置、元件或组成部分之间内部的连通。对于本领域普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
此外，术语"第一"、"第二"等主要是用于区分不同的部件或组成部分，并非用于表明或暗示所指示部件或组成部分的相对重要性和数量。除非另有说明，"多个"的含义为两个或两个以上。
下面结合实施例和附图对本发明的技术方案作进一步的说明。
实施例一
本实施例提供一种电容式指纹识别触摸面板，包括触控模组和电容式指纹识别模组，所述电容式指纹识别模组包括电容式指纹识别芯片、柔性电路板、金属件以及保护层，所述柔性电路板的第一端上表面电性连接所述电容式指纹识别芯片，所述柔性电路板的第一端下表面设有第一补强板，所述柔性电路板的第二端上表面设有第二补强板，所述柔性电路板的第二端下表面设有连接器，所述连接器用于将所述柔性电路板与所述触控模组电性连接；所述保护层覆盖在所述电容式指纹识别芯片上表面，所述金属件设在所述柔性电路板的第一端的上表面，所述金属件用于固定所述电容式指纹识别芯片和所述保护层。
其中，由于电容式指纹识别芯片发出的电子信号可以穿过手指的表皮层，达到手指皮肤的真皮层，直接读取指纹图案，从而可以大大提高指纹识别成功率以及降低对手指干净程度的要求。另外，考虑到柔性电路板的结构特点，其柔韧性较强，不便与其他部件结构的组装，因此在本发明中设置了补强板，通过对柔性电路板与其它部件结构连接处进行补强，提高其连接处的强度，从而方便后续产品的组装。
实施例二
本实施例提供一种电容式指纹识别触摸面板，该触摸面板用于智能手机或平板电脑，如图1、图2所示，该触摸面板可以包括触控模组（图未示）、电容式指纹识别模组1和位于触控模组上方的玻璃面板2。该玻璃面板2可划分为可视区21和非可视区22，在非可视区22内可以设有一开孔23，用于容纳电容式指纹识别模组1。在本实施例中，开孔23为圆形开孔。实际上，开孔23还可以设置为正方形开孔、圆角矩形开孔等形状，只要符合电容式指纹识别模组1的要求即可，本发明不作限定。
其中，电容式指纹识别模组1可以包括电容式指纹识别芯片11、柔性电路板12、金属件13以及盖板14。其中，柔性电路板12的第一端上表面电性连接电容式指纹识别芯片11;盖板14作为保护层，其厚度优选可以为0.1mm,并且盖板14可以通过胶水贴合在电容式指纹识别芯片11上表面；金属件13可以设在柔性电路板12的第一端的上表面，金属件13可以用于固定电容式指纹识别芯片11和盖板14。结合图3、图4所示，金属件13可以包括圆环体131，以及从该圆环体131的一端圆环边缘（即图3中大致沿纸面朝里的一端圆环边缘处）向四周同一平面延伸形成的贴合体132。圆环体131主要用于嵌套住电容式指纹识别芯片11和盖板14。而贴合体132主要用于贴合固定柔性电路板12的第一端上表面，具体是柔性电路板12的第一端上表面上除被电容式指纹识别芯片11占用的区域之外的其余区域上可以设有粘合区121，贴合体132可以通过导电胶与粘合区121贴合固定。优选地，如图3所示，柔性电路板12的第一端上表面上除被电容式指纹识别芯片11占用的区域之外的其余四个角区域上可以分别设有一个粘合区121，相应地，贴合体132可以通过导电胶同时与这四个粘合区121贴合固定，从而实现贴合体132与柔性电路板12的第一端上表面的固定连接，从而可以实现金属件13与柔性电路板12的固定，并且可以实现电容式指纹识别芯片11和盖板14嵌套在圆环体131中。另外，在本实施例中，金属件13也在指纹识别的过程中起导电作用。
在本实施例中，电容式指纹识别芯片11中设有指纹识别单元，指纹识别单元包括感应电极和驱动电极。感应电极与驱动电极之间具有检测间隙，可构成一个基本电容器。当手指按压在电容式指纹识别芯片11上方时，由于指纹脊的介电常数是空气的数倍，因此感应电极与驱动电极之间的电容耦合会根据指纹脊还是指纹谷位于检测间隙上方有不同改变。由此来判断出按压的指纹脊和指纹谷，采集得到指纹图像。另外，电容式指纹识别芯片11中还设有特征提取/匹配模块，用于将采集到的指纹图像与预先已录入的指纹进行比较，从而判断两个指纹图像是否来自同一手指。另外，本实施例中在电容式指纹识别芯片外周设置金属件，通过金属件与电容式指纹识别芯片的连接，使得人的手指通过触摸金属件来实现电容式指纹识别芯片对于指纹的检测功能。此外，由于盖板位于电容式指纹识别芯片上方，因此会经常接受用户的触摸和按压等操作，作为电容式指纹识别芯片的保护层，盖板需要达到一定强度且耐磨损，在本实施例中，优选采用蓝宝石玻璃盖板或黑白色调的陶瓷盖板作为电容式指纹识别芯片的保护层。
另外，考虑到柔性电路板的材料柔韧度较大，其与其它部件连接处的连接强度较弱，因此本实施例中设置多处补强板，以提高柔性电路板与其它部件连接处的强度，方便后续产品的组装。具体地，结合图4、图5、图6所示，可以在柔性电路板12的第一端下表面（在图5中为柔性电路板12的右侧）设有第一补强板16，即柔性电路板12与电容式指纹识别芯片11电性连接的第一端设置在电容式指纹识别芯片11与第一补强板16之间，从而使柔性电路板12与电容式指纹识别芯片11之间的连接处强度提高。同时，柔性电路板12的第二端上表面（在图5中为柔性电路板12的左侧）可以设有第二补强板17，而在柔性电路板12的第二端下表面（在图5中为柔性电路板12的右侧）可以设有连接器18，该连接器18用于将柔性电路板12与触控模组电性连接。
可以理解的是，在本实施例中，由于指纹识别模组设置在玻璃面板的开孔中，因此指纹识别模组是设置在智能手机和/或平板电脑的正面。实际上，本实施例中的指纹识别模组还可设置在智能手机和/或平板电脑的背面，即设置在智能手机背盖和/或平板电脑背盖上。如图7、图8所示，当指纹识别模组1设置在智能手机背盖3上时，该智能手机背盖3上设有一挖孔31，使指纹识别模组1容置在挖孔31中。此时，设置在电容式指纹识别芯片11上表面的保护层则由镀膜15替代盖板14。具体地，可将具有耐磨、防刮花性能的药水通过蒸镀或涂布工艺镀在在电容式指纹识别芯片表面，形成一层厚度小于35μm的镀膜作为保护层，使得该镀膜具有防刮花性能，对指纹识别模组起到保护作用，进而帮助实现在智能手机和/或平板电脑的背面进行指纹识别。由于该镀膜的厚度要比盖板的厚度小很多，从而缩小了电容式指纹识别芯片对于指纹的识别距离，因而更有利于指纹识别功能的发挥。
本发明的保护范围不限于此，本领域中的技术人员任何基于本发明技术方案上非实质性变更均包括在本发明保护范围之内。

Claims (10)

  1. 一种电容式指纹识别触摸面板，其特征在于：包括触控模组和电容式指纹识别模组，所述电容式指纹识别模组包括电容式指纹识别芯片、柔性电路板、金属件以及保护层，所述柔性电路板的第一端上表面电性连接所述电容式指纹识别芯片，所述柔性电路板的第一端下表面设有第一补强板，所述柔性电路板的第二端上表面设有第二补强板，所述柔性电路板的第二端下表面设有连接器，所述连接器用于将所述柔性电路板与所述触控模组电性连接；所述保护层覆盖在所述电容式指纹识别芯片上表面，所述金属件设在所述柔性电路板的第一端的上表面，所述金属件用于固定所述电容式指纹识别芯片和所述保护层。
  2. 根据权利要求1所述的电容式指纹识别触摸面板，其特征在于：所述金属件包括圆环体以及从所述圆环体的一端圆环边缘向四周同一平面延伸形成的贴合体，所述贴合体贴合在所述柔性电路板的第一端上表面上，并且所述电容式指纹识别芯片和所述保护层嵌套在所述圆环体中。
  3. 根据权利要求2所述的电容式指纹识别触摸面板，其特征在于：所述柔性电路板的第一端上表面上除被所述电容式指纹识别芯片占用的区域之外的其余区域上设有粘合区，所述贴合体通过导电胶与所述粘合区贴合固定。
  4. 根据权利要求1或2所述的电容式指纹识别触摸面板，其特征在于：所述电容式指纹识别触摸面板还设有位于所述触控模组上方的玻璃面板，所述玻璃面板划分为可视区和非可视区，在所述非可视区内设有一开孔，使所述电容式指纹识别模组容置在所述开孔中。
  5. 根据权利要求4所述的电容式指纹识别触摸面板，其特征在于：所述开孔为圆形开孔、正方形开孔、圆角矩形开孔中的任意一种。
  6. 根据权利要求4所述的电容式指纹识别触摸面板，其特征在于：所述保护层为盖板，所述盖板通过胶水粘贴在所述电容式指纹识别芯片上表面。
  7. 根据权利要求6所述的电容式指纹识别触摸面板，其特征在于:所述盖板为陶瓷盖板或蓝宝石盖板。
  8. 根据权利要求1或2所述的电容式指纹识别触摸面板，其特征在于：所述触摸面板用于智能手机和/或平板电脑，所述智能手机和/或平板电脑设有背盖，在所述背盖上设有挖孔，使所述指纹识别模组容置在所述挖孔中。
  9. 根据权利要求8所述的电容式指纹识别触摸面板，其特征在于：所述保护层为镀膜。
  10. 根据权利要求9所述的电容式指纹识别触摸面板，其特征在于:所述镀膜的厚度a，且所述a满足：0 < a《0.5μm。
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