WO2015113396A1 - 指纹识别装置及具有其的移动终端 - Google Patents

指纹识别装置及具有其的移动终端 Download PDF

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Publication number
WO2015113396A1
WO2015113396A1 PCT/CN2014/084560 CN2014084560W WO2015113396A1 WO 2015113396 A1 WO2015113396 A1 WO 2015113396A1 CN 2014084560 W CN2014084560 W CN 2014084560W WO 2015113396 A1 WO2015113396 A1 WO 2015113396A1
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WO
WIPO (PCT)
Prior art keywords
fingerprint identification
identification device
circuit
dielectric cover
electrically connected
Prior art date
Application number
PCT/CN2014/084560
Other languages
English (en)
French (fr)
Inventor
龙卫
邱奕翔
Original Assignee
深圳市汇顶科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 深圳市汇顶科技股份有限公司 filed Critical 深圳市汇顶科技股份有限公司
Priority to KR1020167019624A priority Critical patent/KR20160102482A/ko
Priority to EP14880565.8A priority patent/EP3101588B1/en
Publication of WO2015113396A1 publication Critical patent/WO2015113396A1/zh
Priority to US15/218,081 priority patent/US9971923B2/en

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Classifications

    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/96—Touch switches
    • H03K17/962—Capacitive touch switches
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/02—Constructional features of telephone sets
    • H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2218/00—Aspects of pattern recognition specially adapted for signal processing
    • G06F2218/08—Feature extraction
    • G06F2218/10—Feature extraction by analysing the shape of a waveform, e.g. extracting parameters relating to peaks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
    • H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
    • H01L2224/42—Wire connectors; Manufacturing methods related thereto
    • H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
    • H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
    • H01L2224/4805—Shape
    • H01L2224/4809—Loop shape
    • H01L2224/48091—Arched
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2203/00—Aspects of automatic or semi-automatic exchanges
    • H04M2203/60—Aspects of automatic or semi-automatic exchanges related to security aspects in telephonic communication systems
    • H04M2203/6054—Biometric subscriber identification

Definitions

  • the present invention relates to the field of fingerprint recognition, and in particular to a fingerprint identification device and a mobile terminal having the same. Background technique
  • Fingerprint identification devices have begun to be widely used in various terminal devices, such as mobile terminals, banking systems, time and attendance systems, and the like.
  • the most commonly used fingerprint recognition devices are finger swipe type and optical imaging type, in which finger swip type sensitivity is poor, finger staining or poor direction may cause induction failure; meanwhile, finger swipe type and optical imaging type fingerprint
  • the identification device is poor in security and is easily cracked by fingerprint copying.
  • the fingerprint identification device in the prior art has a complicated package, a large structure, and is not easy to install.
  • the required raw material process and module packaging process are very high, the cost is high, and the production yield and efficiency are low.
  • the present invention aims to solve at least one of the technical problems in the related art to some extent.
  • a fingerprint identification device includes: a fingerprint recognition module, the fingerprint recognition module includes a sensing circuit, a control circuit, and a bottom plate, wherein the sensing circuit is disposed on the bottom plate through a support member, and the sensing circuit and the The bottom plate is electrically connected, the control circuit is electrically connected to the bottom plate and located under the sensing circuit; the conductor holder is provided with a through hole, and the conductor holder is disposed on the fingerprint identification module And the conductor holder is electrically connected to the bottom plate; a dielectric cover sheet, the dielectric cover sheet is mounted in the through hole and connected to the sensing circuit, so that the sensing circuit presses the medium through a finger The cover slip collects fingerprints and generates an analog signal.
  • the sensing circuit and the control circuit are integrated on the bottom plate, and the sensing circuit is supported by the support member, and the control circuit is located below the sensing circuit, thereby reducing the finger
  • the structure of the pattern recognition module further reduces the structure of the fingerprint recognition device, and facilitates assembly of the fingerprint recognition device into the mobile terminal.
  • the fingerprint recognition apparatus may further have the following additional technical features:
  • the sensing circuit is electrically connected to the backplane by a bonding wire.
  • the fingerprint identification module further includes a first protective glue, and the first protective adhesive covers the bonding wire.
  • the fingerprint identification module further includes a second protective glue, and the second protective glue is filled in a space defined by the sensing circuit and the bottom plate.
  • the fingerprint recognition module further includes an LED lamp, and the LED lamp is disposed on the bottom plate and electrically connected to the control circuit.
  • the fingerprint identification module further includes a buffer circuit, and the LED lamp is electrically connected to the control circuit through the buffer circuit.
  • the LED light is a breathing light.
  • the LED lights are two and the two LED lights are symmetrically disposed on the base plate.
  • the dielectric cover sheet is provided with an identification mark.
  • the conductor support and the dielectric cover sheet are connected by a liquid glue.
  • the peripheral wall of the through hole of the conductor holder is provided with a receiving groove for accommodating liquid glue.
  • a grounding ring is disposed between the dielectric cover sheet and the conductor support.
  • the conductor holder and the dielectric cover sheet are respectively formed into a square structure.
  • a mobile terminal according to the present invention includes the above-described fingerprint recognition apparatus according to the present invention.
  • FIG. 1 is an assembled view of a fingerprint recognition apparatus according to an embodiment of the present invention
  • FIGS. 2 and 3 are exploded schematic views of different angles of a fingerprint recognition apparatus according to an embodiment of the present invention.
  • FIG. 4 is a cross-sectional view of a fingerprint recognition module in a fingerprint recognition device in accordance with an embodiment of the present invention.
  • Fingerprint identification device 100 fingerprint recognition module 1, induction circuit 10, control circuit 12, bottom plate 13, support member 14, bonding wire 15, first protective adhesive 16a, second protective adhesive 16b, LED lamp 17, conductive terminal 18, Flexible circuit board 19, component 11, conductor holder 1, through hole 20, dielectric cover sheet 3,
  • a fingerprint identification device 100 may be described below with reference to FIG. 1 to FIG. 4, which may be applied to mobile terminals such as mobile phones, tablet computers, notebook computers, media players, and the like, and may also be applied to financial services such as ATM machines. Terminal Equipment.
  • a fingerprint identification device 100 includes: a fingerprint recognition module 1, a conductor holder 2, and a dielectric cover sheet 3, wherein the fingerprint recognition module 1 includes a sensing circuit 10, The control circuit 12 and the bottom plate 13, the sensing circuit 10 is disposed on the bottom plate 13 via the support member 14, and the sensing circuit 10 is electrically connected to the bottom plate 13, and the control circuit 12 is electrically connected to the bottom plate 13 and below the sensing circuit 10.
  • the fingerprint recognition module 1 includes the sensing circuit 10, the control circuit 12 and the bottom plate 13 in sequence, wherein the lower end of the support member 14 is disposed on the bottom plate 13, and the sensing circuit 10 is disposed on the support The upper end of the member 14 defines a space between the sensing circuit 10 and the bottom plate 13.
  • the control circuit 12 is disposed on the bottom plate 13 and located in a space defined between the sensing circuit 10 and the bottom plate 13, and the control circuit 12 is electrically connected to the bottom plate 13. . Wherein, if the space defined between the sensing circuit 10 and the bottom plate 13 is large enough, other components 11 may be disposed on the bottom plate 13.
  • the circuit is distributed on the bottom plate 13 to serve as a bridge for interconnection, and is also a process frame of the fingerprint recognition module 1, wherein the circuit on the bottom plate 13 can be a 2 or 4 layer structure.
  • the bottom plate 13 may be a substrate or a flexible circuit board, or a rigid flexible circuit board.
  • the bottom plate 13 is a substrate. It is necessary to connect a flexible circuit board 19 to the external circuit on the substrate.
  • the conductor bracket 2 is provided with a through hole 20, the conductor bracket 2 is covered on the fingerprint recognition module 1, and the conductor bracket 2 is electrically connected to the bottom plate 13.
  • the conductor holder 2 is a conductive material, preferably a metal material. Quality.
  • the conductor support 2 serves as a frame support for fixing the entire fingerprint recognition device 100 and, on the other hand, for transmitting a pulse signal.
  • the dielectric cover sheet 3 is mounted in the through hole 20 and connected to the sensing circuit 10 to cause the sensing circuit 10 to capture the fingerprint by the finger pressing the dielectric cover sheet 3 and generate an analog signal, that is, the sensing circuit 10 presses the dielectric cover by the finger.
  • the chip 3 collects fingerprints and generates analog signals.
  • the sensing circuit 10 can be a multi-channel high-efficiency sensor chip. In other words, the sensing circuit 10 is used to sense a user fingerprint and convert the fingerprint signal into an analog signal.
  • the control circuit 12 converts the analog signal into a digital signal, and generates a fingerprint image through a corresponding algorithm, thereby implementing fingerprint recognition.
  • the conductor holder 2 and the dielectric cover sheet 3 are respectively formed in a square structure.
  • the dielectric cover sheet 3 is an anisotropic dielectric material, preferably an artificial sapphire glass or tempered glass having aluminum oxide as a main component, which serves to protect the internal structure and provides a flat interface for finger contact.
  • the dielectric constant of the dielectric cover sheet 3 is preferably 9. 3 to 11. 5, the thickness is less than 350 ⁇ m, the flatness is less than 10 ⁇ m, and the surface accuracy is 0.1 ⁇ .
  • the parameters of the dielectric cover sheet 3 are only preferred embodiments, and Do not limit it.
  • the color gradation of the dielectric cover sheet 3 mainly comes from deposition formation or formation of a plating layer by special techniques or bonding the ink layer underneath, in order to ensure that the dielectric cover sheet 3 is opaque, and the user is prevented from seeing the underlying device structure, the edge of the dielectric cover sheet 3
  • the heat-activated film and the peripheral sealant may be bonded to the conductor holder 2.
  • the sensing circuit 10 may select an inductive chip, and the control circuit 12 may select a control chip.
  • the sensing chip is provided with a sensing circuit for sensing the fingerprint of the user and converting the fingerprint signal into an analog signal.
  • the sensing circuit can be packaged in a single in-line package, or a single chip, and the following components can be added and can be filled. The gel is protected or directly underfilled for filling protection.
  • the sensing circuit 10 can be encapsulated in an epoxy or other elastomeric material (or alternatively encapsulated in a ceramic or transparent high dielectric constant material), and then the colloid or cover of the sensing area is removed, completely exposed, or simply The bare top exposes an Exposed die package, allowing the sensor chip to use less vertical space and is properly protected from collision damage during assembly.
  • the sensing circuit exhibits a capacitive connection mode, which forms a capacitance with the ridge and valley of the fingerprint of the user's finger.
  • the skin characteristic of the user's finger has a constant dielectric constant. When the body fluid changes or the finger is replaced, the capacitance is read. The values are different, so as to achieve the purpose of distinguishing different fingers or fingerprints.
  • the fingerprint identification module 1 is electrically connected through the bottom plate 13, and the bottom plate 13 may be a substrate or a flexible circuit board, or a rigid flexible circuit board. If it is a substrate, it is necessary to consider that the additional flexible circuit board 19 is connected to the external circuit, and the number and position of the pins will be limited; The flexible circuit board is directly connected, no additional flexible circuit board is required, but the C0F/C0B process capability is required.
  • the fingerprint identification device 100 integrates the sensing circuit 10 and the control circuit 12 on the bottom plate 13, and the sensing circuit 10 is supported by the support member 14.
  • the control circuit 12 is located below the sensing circuit 10, thereby reducing the fingerprint.
  • the structure of the module 1 is identified, and the structure of the fingerprint recognition device 100 is further reduced, so that the fingerprint recognition device 100 can be easily assembled into the mobile terminal.
  • the sensing circuit 10 is electrically connected to the bottom plate 13 by a bonding wire 15, wherein the bonding wire 15 may be soldered with an RSSB wire or other means to lower the maximum arc.
  • the present invention is not limited thereto, and the sensing circuit 10 can also be electrically connected to the bottom plate 13 through the through silicon via structure, thereby avoiding the problem that the bonding wire 15 is taken out from the top layer of the sensing circuit 10 to cause flatness of the dielectric cover sheet 3.
  • control circuit 12 is electrically coupled to backplane 13 via bond wires 15 in accordance with some embodiments of the present invention.
  • the present invention is not limited thereto, and the control circuit 12 can also be electrically connected to the bottom plate 13 through the through silicon via structure, thereby avoiding the problem that the bonding wire 15 is taken out from the top layer of the control circuit 12 to cause flatness of the dielectric cover sheet 3.
  • the fingerprint recognition module 1 further includes a first protective adhesive 16a and a second protective adhesive 16b, and the first protective adhesive 16a is overlaid on the bonding wire 15.
  • the second protective adhesive 16b is filled in the space defined by the sensing circuit 10 and the bottom plate 13. That is, the periphery of the sensing circuit 10 is surrounded by the first protective adhesive 16a and the second protective adhesive 16b to protect the sensing circuit 10 from being damaged during assembly, and the first protective adhesive 16a can cover the bonding wire 15 To ensure that the wire 15 is stable and avoids collapse.
  • the first protective adhesive 16a and the second protective adhesive 16b may be filled and cured after the sensing circuit 10 and the control circuit 12 are assembled to the bottom plate 13, and the first protective adhesive 16a and the second protective adhesive 16b may be integrally formed.
  • the fingerprint recognition module 1 further includes an LED lamp 17, and the LED lamp 17 is disposed on the bottom plate 13 and electrically connected to the control circuit 12.
  • the dielectric cover sheet 3 needs to be properly coated.
  • the semi-antireflection film can be plated in a place where the brightness is required to be displayed, and the display is not required to be plated into a colorful film, wherein the dielectric cover sheet 3 is provided with an identification.
  • An identification (not shown) can be designed as a fingerprint shape. Thereby, the ornamental of the fingerprint recognition module 1 can be increased.
  • the LED light 17 can be a breathing light.
  • the fingerprint recognition module 1 further includes a buffer circuit (not shown), and the LED lamp 17 is electrically connected to the control circuit 12 through the buffer circuit.
  • the LED lamp 17 is two and two LEDs.
  • the lamp 17 is symmetrically disposed on the bottom plate 13, so that the purpose of providing a ring lamp can be achieved by providing two LED lamps 17.
  • the conductor holder 2 and the dielectric cover sheet 3 are connected by liquid glue, and the peripheral wall of the through hole 20 of the conductor holder 2 is provided with a receiving groove for accommodating liquid glue (not shown). , thereby ensuring that the liquid glue solidifies to form a fixed structure and increase stability.
  • a grounding ring is provided between the dielectric cover sheet 3 and the conductor support 2.
  • the surface of the dielectric cover sheet 3 is lower than the top of the through hole 20 of the conductor holder 2 (approximately between 0. f0. 25 mm), thereby guiding and ensuring that the user's finger contacts the conductor when pressing the dielectric cover sheet 3
  • the edge of the through hole 20 of the bracket 2 forms a pulse circuit, and a pulse signal emitted from the edge of the through hole 20 of the conductive conductor holder 2 enables the sensing circuit 10 to read the electric field change value.
  • at least one conductive terminal 18 (such as a metal terminal) is disposed on the bottom plate 13 to electrically connect the bottom plate 13 and the conductor support 2 at least one contact point, and then the control circuit 12 passes through the conductive terminal 18. It is electrically connected to the conductor holder 2. Therefore, it is not necessary to additionally provide electrodes on the inner wall of the through hole 20 of the conductor holder 2, which saves material and assembly costs.
  • the sensing circuit 10 and the dielectric cover sheet 3 may be connected by a liquid non-conductive adhesive or a non-conductive adhesive film, but the thickness of the liquid non-conductive adhesive or non-conductive adhesive film needs to be controlled, generally below 50 ⁇ m, Make sure that the signal is not too thick and weakens, affecting the sensitivity of the command reading.
  • the dielectric cover sheet 3 may be square, circular or other applicable shape; the surface thereof has a plating structure to achieve its opacity effect, or may be a film formed by a film connected to the sensor chip at the bottom layer, It may be that the single color layer is separated from the connecting film; if the surface is realized by plating, a semi-translucent layer should be formed, that is, the LED lamp 17 can be transmitted through and thus see a luminous mark on the upper side for guiding the customer. Purpose; This semi-transparent graphic can be made into a traditional "Home Key” model, or it can be a finger fingerprint graphic in the embodiment of the present invention, or it can be set by the user.
  • the fingerprint identification device 100 of the present invention may be combined with a control button or a switching element, or may be disposed under the screen main control panel of the terminal device, and may be close to the physical home button or the main control board position of the virtual Home button in the smart phone.
  • the combination of control buttons or display elements can be directly formed using the high stiffness, wear resistance, etc. of the sapphire glass. Or embedded in a cover glass system or a housing of a fixed structure or device.
  • some appropriate adaptive adjustments can be made according to the conditions of the terminal device, so that the fingerprint feature can be easily and sensitively recognized, as a system password lock, preventing information leakage and protecting privacy.
  • the fingerprint recognition module 1 has high sensitivity and Highly accurate recognition rate, and the fingerprint recognition module 1 is highly malleable, and can modify the shape of the module (circular or square), indicating appearance, color and graphics according to customer requirements.
  • the fingerprint identification device 100 of the present invention has high production efficiency, solves the connection problem of the flexible circuit board 19, has high yield, and particularly enhances the ornamental effect.
  • a mobile terminal includes the fingerprint recognition apparatus 100 according to the above embodiment of the present invention.
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, there is a limit of "first”,
  • the "second” feature may include one or more of the features explicitly or implicitly.
  • the meaning of "plurality” is two or more unless specifically and specifically defined.
  • Fixed should be understood broadly. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly through an intermediate medium. Connected, it can be the internal communication of two components or the interaction of two components.
  • the specific meaning of the above terms in the present invention can be understood by those skilled in the art on a case-by-case basis.
  • the first feature "on” or “below” the second feature may be the direct contact of the first feature and the second feature, or the first and second features are indirectly through the intermediate medium, unless otherwise explicitly stated and defined. contact.
  • the first feature "above”, “above” and “above” the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature.
  • the first feature “below”, “below” and “below” the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.
  • the fingerprint identification device of the invention integrates the induction circuit and the control circuit on the bottom plate, the induction circuit is supported by the support member, and the control circuit is located below the induction circuit, thereby reducing the structure of the fingerprint recognition module, thereby reducing the fingerprint recognition device
  • the structure facilitates assembly of the fingerprint recognition device into the mobile terminal.

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Abstract

一种指纹识别装置及具有其的移动终端。指纹识别装置包括：指纹识别模组，指纹识别模组包括感应电路、控制电路和底板，感应电路通过支撑件设在底板上且感应电路与底板电连接，控制电路电连接至底板且位于感应电路的下方。导体支架，导体支架上设有通孔，导体支架罩在指纹识别模组上，导体支架与底板电连接。介电盖片，介电盖片装配在通孔内且与感应电路连接以使得感应电路通过手指按压介电盖片采集指纹并生成模拟信号。根据上述指纹识别装置，可以缩小指纹识别模组的结构，进而缩小指纹识别装置的结构，便于将该指纹识别装置装配到移动终端中。

Description

说 明 书 指紋识别装置及具有其的移动终端
技术领域
本发明涉及指纹识别领域，尤其是涉及一种指纹识别装置及具有其的移动 终端。 背景技术
指纹识别装置已开始广泛应用于各种终端设备， 如移动终端、 银行系统、 考勤系统等。最常用的指纹识别装置是手指划动型和光学成像型， 其中手指划 动型灵敏度较差， 手指有沾污或者方向不佳均会导致感应失灵； 同时， 手指划 动型和光学成像型指纹识别装置的安全性差， 容易被指纹复制方式破解。
现有技术中的指纹识别装置的封装较为复杂， 结构较大， 不易安装， 要求 的原料工艺及模组封装工艺都非常高， 成本也很高， 同时生产良率以及效率都 很低。 发明内容
本发明旨在至少在一定程度上解决相关技术中的技术问题之一。
为此， 本发明的一个目的在于提出一种指纹识别装置， 结构较小。
本发明的另一个目的在于提出一种具有上述指纹识别装置的移动终端。 根据本发明的指纹识别装置， 包括： 指纹识别模组， 所述指纹识别模组包 括感应电路、控制电路和底板，所述感应电路通过支撑件设在所述底板上且所 述感应电路与所述底板电连接，所述控制电路电连接至所述底板且位于所述感 应电路的下方； 导体支架， 所述导体支架上设有通孔， 所述导体支架罩在所述 指纹识别模组上， 且所述导体支架与所述底板电连接； 介电盖片， 所述介电盖 片装配在所述通孔内且与所述感应电路连接以使得所述感应电路通过手指按 压所述介电盖片采集指纹并生成模拟信号。
根据本发明的指纹识别装置， 通过将感应电路和控制电路集成在底板上， 感应电路被支撑件支撑起来，控制电路位于感应电路的下方， 从而可以缩小指 纹识别模组的结构，进而缩小指纹识别装置的结构， 便于将该指纹识别装置装 配到移动终端中。
另外，根据本发明上述实施例的指纹识别装置还可以具有如下附加的技术 特征：
在本发明的一些实施例中， 所述感应电路通过焊线与所述底板电连接。 优选地， 所述指纹识别模组还包括第一保护胶， 所述第一保护胶覆盖在所 述焊线上。
优选地， 所述指纹识别模组还包括第二保护胶， 所述第二保护胶填充在所 述感应电路和所述底板限定出的空间内。
根据本发明的一些实施例， 所述指纹识别模组还包括 LED灯， 所述 LED灯 设在所述底板上且与所述控制电路电连接。
优选地， 所述指纹识别模组还包括缓冲电路， 所述 LED灯通过所述缓冲电 路与所述控制电路电连接。
可选地， 所述 LED灯为呼吸灯。
在本发明的一些示例中，所述 LED灯为两个且所述两个 LED灯对称设在所 述底板上。
在本发明的一些示例中， 所述介电盖片上设有识别标识。
根据本发明的一些实施例，所述导体支架和所述介电盖片之间采用液态胶 相连。
优选地， 所述导体支架的所述通孔的周壁上设有用于容纳液态胶的容纳 槽。
在本发明的一些实施例中， 所述介电盖片和所述导体支架之间设有接地 环。
优选地， 所述导体支架和所述介电盖片分别形成为方体结构。
根据本发明的移动终端， 包括根据本发明上述的指纹识别装置。 附图说明
图 1为根据本发明实施例的指纹识别装置的装配图；
图 2和图 3为根据本发明实施例的指纹识别装置的不同角度的分解示意 图；
图 4为根据本发明实施例的指纹识别装置中的指纹识别模组的剖面图。 附图标记：
指纹识别装置 100、 指纹识别模组 1、 感应电路 10、 控制电路 12、 底板 13、 支撑件 14、 焊线 15、 第一保护胶 16a、 第二保护胶 16b、 LED灯 17、 导电 端子 18、 柔性电路板 19、 元件 11、 导体支架 1、 通孔 20、 介电盖片 3、 具体实施方式
下面详细描述本发明的实施例， 所述实施例的示例在附图中示出， 其中自 始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元 件。下面通过参考附图描述的实施例是示例性的， 旨在用于解释本发明， 而不 能理解为对本发明的限制。
下面参考图 1-图 4描述根据本发明实施例的指纹识别装置 100， 该指 纹识别装置 100可以应用于手机、 平板电脑、 笔记本电脑、 媒体播放器等 移动终端， 也可以应用于 ATM机等金融终端设备。
如图 1-图 4所示， 根据本发明实施例的指纹识别装置 100， 包括： 指纹识 别模组 1、导体支架 2和介电盖片 3，其中，指纹识别模组 1包括感应电路 10、 控制电路 12和底板 13， 感应电路 10通过支撑件 14设在底板 13上且感应电 路 10与底板 13电连接， 控制电路 12电连接至底板 13且位于感应电路 10的 下方。 也就是说， 在从上到下的方向上， 指纹识别模组 1 依次包括感应电路 10、 控制电路 12和底板 13， 其中， 支撑件 14的下端设在底板 13上， 感应电 路 10设在支撑件 14的上端， 从而感应电路 10和底板 13之间限定出空间，控 制电路 12设在底板 13上且位于感应电路 10和底板 13之间限定的空间内，同 时控制电路 12与底板 13电连接。 其中， 如果感应电路 10和底板 13之间限 定的空间够大， 还可以在底板 13上设置其他元件 11。
具体地， 底板 13上分布了电路， 起到互联桥接作用， 同时是指纹识别模 组 1的制程构架， 其中底板 13上的电路可以是 2或 4层板结构。 在本发明的 示例中， 底板 13可以为基板或者柔性电路板， 或者刚挠结合电路板， 在本发 明的优选实施例中， 如图 2-图 4所示， 底板 13为基板， 则此时需要在基板上 连接一个柔性电路板 19外接外部电路。
导体支架 2上设有通孔 20， 导体支架 2罩在指纹识别模组 1上， 且导体 支架 2与底板 13电连接。 具体而言， 导体支架 2为导电材料， 优选为金属材 质。 该导体支架 2—方面起构架支撑作用以固定整个指纹识别装置 100， 另一 方面用于传导脉冲信号。介电盖片 3装配在通孔 20内且与感应电路 10连接以 使得感应电路 10通过手指按压介电盖片 3采集指纹并生成模拟信号， 也就是 说， 感应电路 10通过手指按压介电盖片 3采集指纹并生成模拟信号， 感应电 路 10可为多通道高效传感芯片， 换言之， 感应电路 10用于感知用户指纹并将 指纹信号转换成模拟信号。 其中， 控制电路 12将模拟信号转化成数字信号， 通过相应的算法生成指纹图像， 进而实现指纹识别。
在本发明的示例中， 导体支架 2和介电盖片 3分别形成为方体结构。
具体地， 介电盖片 3为各向异性的介电材料， 优选以三氧化二铝为主要成 分的人造蓝宝石玻璃或钢化玻璃， 其用于保护内部结构，提供一平整界面供手 指接触。 介电盖片 3的介电常数优选 9. 3〜11. 5， 厚度 350um以下， 平面度小 于 lOum, 面形精度 0. 1 λ， 前述介电盖片 3的参数仅做优选实施例， 并不对其 做限制。介电盖片 3的颜色层次主要来自于沉积形成或者由特殊技术形成镀层 或者于底下贴合油墨层， 目的是保证介电盖片 3不透明，避免用户看见底层器 件结构， 介电盖片 3 边缘可以使用热活化膜和周边密封剂粘结于导体支架 2 上。
在本发明的一些示例中， 为了减少指纹识别装置 100 的体积， 感应电路 10可选用感应芯片， 控制电路 12可选用控制芯片。 此时感应芯片上设有用于 感知用户指纹并将指纹信号转换成模拟信号的传感电路，传感电路可以封装在 单列直插式封装内， 或者单颗芯片， 下面可以添加元器件， 可以填充胶体来保 护， 或者直接底部填充（underfill )进行填充保护。 感应电路 10可以被封装 于环氧树脂或其它弹性体材料内（或替代地，封装于陶瓷或者透明高介电常数 材料内）， 然后去除感应区域的胶体或遮盖物， 完全裸露出来， 或者只是勉强 露出顶部形成一个 Exposed die封装， 使得感应芯片可以使用较少垂直空间， 并得到合理保护， 避免装配时被碰撞损坏。传感电路呈现电容型连接模式， 与 用户手指指纹的脊和谷形成电容的另一极，用户手指的表皮特征具有恒介电系 数， 当体液变化或者更换手指的时候， 会导致读出的电容值不同， 从而达到区 分不同手指或指纹的目的。
其中， 指纹识别模组 1通过底板 13来进行电路连接， 底板 13可以是基板 或柔性电路板， 或者刚挠结合电路板。 如果是基板， 需要考虑另加柔性电路板 19连出来与外部电路电连接， 并且针脚 （pin) 的数量和位置将受限； 如果是 柔性电路板则直接连接， 不需再加另外的柔性电路板， 但需具备 C0F/C0B 制 程能力。
根据本发明实施例的指纹识别装置 100， 通过将感应电路 10和控制电路 12集成在底板 13上， 感应电路 10被支撑件 14支撑起来， 控制电路 12位于 感应电路 10的下方， 从而可以缩小指纹识别模组 1的结构， 进而缩小指纹识 别装置 100的结构， 便于将该指纹识别装置 100装配到移动终端中。
在本发明的一些实施例中， 如图 4所示， 感应电路 10通过焊线 15与底板 13电连接， 其中， 焊线 15可以采用 RSSB焊线或者其他方式来压低最高弧度。 当然本发明不限于此， 感应电路 10还可通过硅通孔结构与底板 13电连接， 从 而避免焊线 15从感应电路 10顶层引出而导致介电盖片 3平面度的问题。
如图 4所示， 根据本发明的一些实施例， 控制电路 12通过焊线 15与底板 13电连接。当然本发明不限于此，控制电路 12还可通过硅通孔结构与底板 13 电连接，从而避免焊线 15从控制电路 12顶层引出而导致介电盖片 3平面度的 问题。
如图 4所示， 在本发明的一些实施例中， 指纹识别模组 1还包括第一保护 胶 16a和第二保护胶 16b，第一保护胶 16a覆盖在焊线 15上。第二保护胶 16b 填充在感应电路 10和底板 13限定出的空间内。 也就是说， 感应电路 10的周 边被第一保护胶 16a和第二保护胶 16b包住， 以保护感应电路 10在组装过程 中不会被损坏， 同时第一保护胶 16a可以罩住焊线 15， 以确保焊线 15稳定且 避免塌线。 其中， 第一保护胶 16a和第二保护胶 16b可以在感应电路 10和控 制电路 12装配到底板 13后进行填充固化， 第一保护胶 16a和第二保护胶 16b 可以为一体成型件。
根据本发明的一些实施例， 如图 2和图 3所示， 指纹识别模组 1还包括 LED灯 17， LED灯 17设在底板 13上且与控制电路 12电连接。此时介电盖片 3 需要做适当的镀膜， 具体做法是可以将需要显示亮度的地方镀半增透膜， 不需 要显示的镀成炫彩膜， 其中， 介电盖片 3上设有识别标识 （图未示出）， 可将 该识别标识设计成指纹形状。从而可以增加指纹识别模组 1的观赏性。可选地， LED灯 17可以为呼吸灯。
其中， 为了避免 LED灯 17的亮度过小， 在本发明的一些实施例中， 指纹 识别模组 1还包括缓冲电路（图未示出）， LED灯 17通过缓冲电路与控制电路 12电连接。如图 2所示，在本发明的一些示例中， LED灯 17为两个且两个 LED 灯 17对称设在底板 13上， 从而通过设有两个 LED灯 17可以实现提供一个环 灯的目的。
在本发明的一些实施例中，导体支架 2和介电盖片 3之间采用液态胶相连， 导体支架 2的通孔 20的周壁上设有用于容纳液态胶的容纳槽（图未示出）， 从 而可以确保液态胶固化后形成一个固定结构， 增加稳定性。在本发明的一些示 例中， 介电盖片 3和导体支架 2之间设有接地环。
其中， 介电盖片 3 的表面低于导体支架 2 的通孔 20 顶部 （大约在 0. f0. 25mm之间）， 从而引导并确保用户的手指在按压介电盖片 3时会接触到 导体支架 2的通孔 20边缘， 以形成脉冲回路，传导导体支架 2的通孔 20边缘 发射的脉冲信号， 使感应电路 10能读到电场变化数值。 作为优选， 本实施例 中， 底板 13上设有至少一个导电端子 18 (如金属端子）， 以使底板 13与导体 支架 2保持至少一个接触点而电连接， 继而使得控制电路 12通过导电端子 18 与导体支架 2电连接。 从而无需在导体支架 2的通孔 20内壁额外设置电极， 节省了原料及装配成本。
感应电路 10和介电盖片 3之间可以通过液体的非导电胶或者非导电胶膜 来连接，但该液体的非导电胶或者非导电胶膜的厚度需要被管控，一般在 50um 以下， 以确保不会过厚而削弱信号， 影响指令读取的灵敏度。
具体地， 介电盖片 3可以是方形， 圆形或其它能够适用的形状； 其表面有 镀层结构来实现其不透明效果，也可以是通过底层与感应芯片连接的胶膜来实 现颜色层， 也可以是单一颜色层与连接胶膜分开； 如果表面通过镀层来实现， 应形成一个半透光层次， 即 LED灯 17发光可以透过从而在上方看到一个发光 的标识， 以给客户引导使用的目的； 这个半透图形可以做成传统 "Home 键" 模型， 也可以是本文实施例中的手指指纹图形， 也可以是用户自己设定。
本发明的指纹识别装置 100， 可以与控制按钮或者开关元件组合， 也可以 设置在终端设备的屏幕主控面板下方， 在智能手机中可能接近物理 Home键或 者虚拟 Home键的主控板位置。 在一些实施例中， 可以利用蓝宝石玻璃的高硬 度、耐磨等特点， 直接形成控制按钮或者显示元件的组合。或者嵌入到一个盖 玻璃系统或者固定结构或装置的壳体内。总之， 能根据终端设备的条件进行一 些适度的适应性调整， 以便能够方便、灵敏的识别出指纹特征， 作为系统密码 锁， 防止信息泄露， 保护隐私。
根据本发明实施例的指纹识别装置 100， 指纹识别模组 1具有高灵敏度和 高准确识别率， 同时指纹识别模组 1的可塑性强， 能根据客户需求修改模组形 状（圆形或方形）、指示外观、颜色和图形等。 同时本发明的指纹识别装置 100 的生产效率高， 解决了柔性电路板 19的连接难题， 具有高良率， 尤其是增强 了观赏性效果。
根据本发明实施例的移动终端，包括根据本发明上述实施例的指纹识别装 置 100。
在本发明的描述中， 需要理解的是， 术语"中心"、 "纵向"、 "横向"、 "长 度"、 "宽度"、 "厚度"、 "上"、 "下"、 "前"、 "后"、 "左"、 "右"、 "竖直"、 "水平"、 "顶"、 "底" "内"、 "外"、 "轴向"、 "径向"、 "周向"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，仅是为了便于描述本发明和简 化描述， 而不是指示或暗示所指的装置或元件必须具有特定的方位、 以特定的 方位构造和操作， 因此不能理解为对本发明的限制。
此外， 术语 "第一"、 "第二 "仅用于描述目的， 而不能理解为指示或暗示 相对重要性或者隐含指明所指示的技术特征的数量。 由此， 限定有 "第一"、
"第二"的特征可以明示或者隐含地包括一个或者更多个该特征。在本发明的 描述中， "多个" 的含义是两个或两个以上， 除非另有明确具体的限定。
在本发明中，除非另有明确的规定和限定，术语 "安装"、 "相连"、 "连接"、
"固定 "等术语应做广义理解，例如，可以是固定连接， 也可以是可拆卸连接， 或成一体； 可以是机械连接， 也可以是电连接； 可以是直接相连， 也可以通过 中间媒介间接相连， 可以是两个元件内部的连通或两个元件的相互作用关系。 对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中 的具体含义。
在本发明中， 除非另有明确的规定和限定， 第一特征在第二特征 "上" 或 "下" 可以是第一和第二特征直接接触， 或第一和第二特征通过中间媒 介间接接触。 而且， 第一特征在第二特征 "之上" 、 "上方" 和 "上面" 可是第一特征在第二特征正上方或斜上方， 或仅仅表示第一特征水平高度 高于第二特征。 第一特征在第二特征 "之下" 、 "下方" 和 "下面" 可以 是第一特征在第二特征正下方或斜下方， 或仅仅表示第一特征水平高度小 于第二特征。
在本说明书的描述中，参考术语"一个实施例"、 "一些实施例"、 "示例"、 "具体示例"、 或 "一些示例"等的描述意指结合该实施例或示例描述的具体 特征、 结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说 明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且， 描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以 合适的方式结合。 此外， 在不相互矛盾的情况下， 本领域的技术人员可以将本 说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和 组合。
尽管上面已经示出和描述了本发明的实施例， 可以理解的是， 上述实施例 是示例性的， 不能理解为对本发明的限制， 本领域的普通技术人员在本发明的 范围内可以对上述实施例进行变化、 修改、 替换和变型。
工业实用性
本发明的指纹识别装置， 通过将感应电路和控制电路集成在底板上， 感应 电路被支撑件支撑起来，控制电路位于感应电路的下方， 从而可以缩小指纹识 别模组的结构，进而缩小指纹识别装置的结构， 便于将该指纹识别装置装配到 移动终端中。

Claims

权 利 要 求 书
1、 一种指纹识别装置， 包括：
指纹识别模组， 所述指纹识别模组包括感应电路、 控制电路和底板， 所述 感应电路通过支撑件设在所述底板上且所述感应电路与所述底板电连接，所述 控制电路电连接至所述底板且位于所述感应电路的下方；
导体支架， 所述导体支架上设有通孔， 所述导体支架罩在所述指纹识别模 组上， 且所述导体支架与所述底板电连接；
介电盖片，所述介电盖片装配在所述通孔内且与所述感应电路连接以使得 所述感应电路通过手指按压所述介电盖片采集指纹并生成模拟信号。
2、 根据权利要求 1所述的指纹识别装置， 其中， 所述感应电路通过焊线 与所述底板电连接。
3、 根据权利要求 2所述的指纹识别装置， 其中， 所述指纹识别模组还包 括第一保护胶， 所述第一保护胶覆盖在所述焊线上。
4、 根据权利要求 3所述的指纹识别装置， 其中， 所述指纹识别模组还包 括第二保护胶，所述第二保护胶填充在所述感应电路和所述底板限定出的空间 内。
5、 根据权利要求 1所述的指纹识别装置， 其中， 所述指纹识别模组还包 括 LED灯， 所述 LED灯设在所述底板上且与所述控制电路电连接。
6、 根据权利要求 5所述的指纹识别装置， 其中， 所述指纹识别模组还包 括缓冲电路， 所述 LED灯通过所述缓冲电路与所述控制电路电连接。
7、 根据权利要求 5所述的指纹识别装置， 其中， 所述 LED灯为呼吸灯。
8、 根据权利要求 5所述的指纹识别装置， 其中， 所述 LED灯为两个且所 述两个 LED灯对称设在所述底板上。
9、 根据权利要求 5所述的指纹识别装置， 其中， 所述介电盖片上设有识 别标识。
10、 根据权利要求 1所述的指纹识别装置， 其中， 所述导体支架和所述介 电盖片之间采用液态胶相连。
11、 根据权利要求 10所述的指纹识别装置， 其中， 所述导体支架的所述 通孔的周壁上设有用于容纳液态胶的容纳槽。
12、 根据权利要求 1所述的指纹识别装置， 其中， 所述介电盖片和所述导 体支架之间设有接地环。
13、 根据权利要求 1所述的指纹识别装置， 其中， 所述导体支架和所述介 电盖片分别形成为方体结构。
14、 一种移动终端， 包括根据权利要求 1-13中任一项所述的指纹识别装 置。
PCT/CN2014/084560 2014-01-28 2014-08-15 指纹识别装置及具有其的移动终端 WO2015113396A1 (zh)

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