WO2018058694A1 - 指纹撷取设备 - Google Patents

指纹撷取设备 Download PDF

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Publication number
WO2018058694A1
WO2018058694A1 PCT/CN2016/101420 CN2016101420W WO2018058694A1 WO 2018058694 A1 WO2018058694 A1 WO 2018058694A1 CN 2016101420 W CN2016101420 W CN 2016101420W WO 2018058694 A1 WO2018058694 A1 WO 2018058694A1
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Prior art keywords
fingerprint
capture device
image
sensing module
fingerprint capture
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PCT/CN2016/101420
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English (en)
French (fr)
Inventor
赵维民
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深圳市汇顶科技股份有限公司
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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 KR1020177031884A priority Critical patent/KR20180050600A/ko
Priority to CN201680001056.6A priority patent/CN106462759A/zh
Priority to EP16898151.2A priority patent/EP3333760A4/en
Priority to PCT/CN2016/101420 priority patent/WO2018058694A1/zh
Priority to US15/784,201 priority patent/US10621403B2/en
Publication of WO2018058694A1 publication Critical patent/WO2018058694A1/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
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent 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
    • G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms

Definitions

  • the invention relates to a fingerprint capturing device, in particular to an optical capacitance mixing type fingerprint capturing device.
  • the present invention provides a fingerprint capture device, which includes a capacitive sensing module for sensing a finger press to generate a reference signal, and the capacitive sensing module includes An acquisition platform and an inductive electrode; an image sensing module is coupled to the capacitive sensing module, configured to: after the capacitive sensing module generates the reference signal, activate an illumination component to emit an illumination beam to generate a fingerprint image of the finger.
  • the reference signal is generated when the sensing electrode is pressed by the finger and causes the sensing electrode to generate a capacitance change amount.
  • a reflection module directs the illumination beam from the illumination assembly to the image sensing module to generate the fingerprint image.
  • the reflection module comprises a prism and a concentrating assembly.
  • the reflection module comprises a plurality of mirrors.
  • the illumination beam is generated by the reflection of the prism and the concentrating component, and the fingerprint image is generated in the Image sensing module.
  • a first mirror of the plurality of mirrors and the collection platform and the sensing electrode respectively have an angle of less than 90 degrees And causing the illumination beam to pass through the first mirror and a second mirror of the plurality of mirrors to generate the fingerprint image to the image sensing module.
  • the collection platform is a glass.
  • the sensing electrode is one of a transparent conductive film, a double-sided flexible circuit board or a printed circuit board.
  • the fingerprint capture device provided by the invention utilizes the hybrid structure of the capacitive sensing module and the optical fingerprint capture, and has the advantages of low energy consumption and the user's more comfortable use situation.
  • FIG. 1 is a schematic diagram of a fingerprint capture device according to an embodiment of the present invention.
  • FIG. 2 is a schematic diagram of another fingerprint capture device according to an embodiment of the present invention.
  • FIG. 1 is a schematic diagram of a fingerprint capture device 10 according to an embodiment of the present invention.
  • the fingerprint capture device 10 includes a capacitive sensing module 102 , an image sensing module 104 , a light emitting component 106 , and a reflective module 108 .
  • the capacitive sensing module 102 is configured to acquire a fingerprint and generate a reference signal S, which includes an acquisition platform 110 and a sensing electrode 112.
  • the collecting platform 110 is a finger pressing place, and when the sensing electrode 112 satisfies a capacitance change amount according to the pressing of the fingerprint, the reference signal S is generated, for example, when the user's finger presses the collecting platform 110 (such as a glass surface or an acrylic plate).
  • the sensing electrode 112 for example, indium tin oxide (ITO) or other transparent conductive film
  • ITO indium tin oxide
  • the image sensing module 104 is connected to the sensing electrode 112 of the capacitive sensing module 102.
  • the light emitting component 106 is activated to emit an illumination beam, and a fingerprint image of the finger is generated.
  • the reflection module 108 directs the illumination beam from the illumination component 106 to the image sensing module 104 such that the fingerprint image is generated by the image sensing module 104.
  • the fingerprint capture device of the present invention can continuously activate the light-emitting component without using the capacitive sensing module, thereby effectively reducing power consumption and providing a more comfortable use situation for the user.
  • the reflection module 108 of the fingerprint capture device 10 includes a prism 114 and a concentrating assembly 116, wherein the prism 114 is used to pass the illumination beam emitted by the illumination assembly 106 through the prism 114.
  • the fingerprint image is generated by the image sensing module 104 through the concentrating component 116, for example, a convex lens.
  • the sensing electrode 112 for example, the transparent conductive film
  • the sensing electrode 112 generates the reference signal S.
  • the image sensing module 104 receives the power After the change of the reference signal S, the illumination beam of the illumination component 106 is activated, and the reflection and focus of the prism 114 and the concentrating component 116 are caused to cause the image sensing module 104 to generate a fingerprint image.
  • the capacitive sensing module is pressed by the finger to activate the light emitting component, so that the light emitting component does not need to continuously or intermittently emit light, thereby saving power consumption of the fingerprint capturing device and improving the convenience of use by the user.
  • FIG. 2 is a schematic diagram of another fingerprint capture device 20 according to an embodiment of the present invention.
  • the fingerprint capture device 20 is derived from the fingerprint capture device 10 of FIG. 1 .
  • the fingerprint capture device 20 includes a capacitive sensing module 202 , an image sensing module 204 , a light emitting component 206 , and a reflective module 208 .
  • the capacitive sensing module 202 includes an acquisition platform 210 and a sensing electrode 212.
  • the collecting platform 210 is configured to receive a finger pressing. When the sensing electrode 212 satisfies the capacitance change amount according to the pressing of the finger, the reference signal S is generated.
  • the reflection module 208 is composed of mirrors 214 and 216.
  • the mirror 214 has an angle with the collection platform 210 and the sensing electrode 212, respectively. A is less than 90 degrees, and the position of the mirror 216 is substantially parallel to the mirror 214.
  • the positions where the mirrors 214 and 216 are disposed may vary depending on the position of the image sensing module 204, but are not limited thereto.
  • the fingerprint image is imaged on the image sensing module 204, which is within the scope of the present invention.
  • the collection platform 210 eg, a glass surface or an acrylic plate
  • the sensing electrode 212 such as a printed circuit board
  • the reference signal S is generated.
  • the image sensing module 204 activates the illumination beam of the illumination component 206, and generates the peak and valley image of the fingerprint through the reflection of the mirror 214 and the mirror 216.
  • Image sensing module 204 activates the illumination beam of the illumination component 206, and generates the peak and valley image of the fingerprint through the reflection of the mirror 214 and the mirror 216.
  • the fingerprint capture device 20 does not need to use a prism to reflect the fingerprint image on the image sensing module 204. Therefore, the volume of the device can be greatly saved and applied to the mobile handheld device. In this way, the induction of electricity is caused by the pressing of the finger.
  • the capacitance of the pole changes to activate the light-emitting component, so that the light-emitting component does not need to continuously or intermittently emit light, so as to save power consumption of the fingerprint capture device and improve the user's use situation.
  • the present invention provides a hybrid detection device for a capacitive and optical fingerprint, so that the fingerprint capture device can open the light-emitting component continuously or intermittently, and only needs to turn on the light-emitting component to perform fingerprinting when necessary. Take advantage of low power consumption and improved user comfort.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Image Input (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

一种混合式指纹撷取设备，包括一电容感测模块（102），用来感测一手指的按压，以产生一参考信号（S），所述电容感测模块（102）包含一采集平台（110）及一感应电极（112）；一影像感测模块（104），连接于所述电容感测模块（102），用来于所述电容感测模块（102）产生所述参考信号（S）后，启动一发光组件（106）发出一照明光束，以产生所述手指的一指纹影像。所述混合式指纹撷取设备，可有效降低指纹辨识装置于撷取指纹时的功耗，并且具有提升使用者更舒适的使用情境的优点。

Description

指纹撷取设备 技术领域
本发明涉及一种指纹撷取设备，尤其涉及一种光学电容混和式的指纹撷取设备。
背景技术
随着科技的发展与进步，移动电话、数字相机、平板计算机、笔记本电脑等移动电子装置已经成为了人们生活中不可或缺的工具。为了能够有效避免个人移动电子装置的内部数据遭窃，各种不同的保护方法也随之产生。例如，密码认证、声纹辨识或指纹辨识等，其中，光学式指纹辨识受到广泛的使用。然而，由于现有光学指纹传感器的光源需要持续开启，才能将用户的指纹影像形成于影像传感器上，长时间下来导致消耗的功率过高，此外，长亮或间歇性发亮的光源也易影响使用者的使用时观感。
发明内容
因此，本发明的主要目的即在于提供一种电容光学式混合且低功耗的指纹撷取设备。
为了解决上述技术问题，本发明提供了一种指纹撷取设备，其特征在于，包括一电容感测模块，用来感测一手指的按压，以产生一参考信号，所述电容感测模块包含一采集平台及一感应电极；一影像感测模块，连接于所述电容感测模块，用来于所述电容感测模块产生所述参考信号后，启动一发光组件发出一照明光束，以产生所述手指的一指纹影像。
优选地，当所述感应电极受到所述手指按压且造成所述感应电极产生一电容变化量时，产生所述参考信号。
优选地，一反射模块，将来自所述发光组件的所述照明光束，导向所述影像感测模块以产生所述指纹影像。
优选地，所述反射模块包含一棱镜及一聚光组件。
优选地，所述反射模块包含多个反射镜。
优选地，当所述反射模块由所述棱镜及所述聚光组件组合而成时，则所述照明光束通过所述棱镜及所述聚光组件的反射，将所述指纹影像产生于所述影像感测模块。
优选地，当所述反射模块由所述多个反射镜组合而成时，所述多个反射镜的一第一反射镜分别与所述采集平台与所述感应电极存在一夹角小于90度，使得所述照明光束通过所述第一反射镜与所述多个反射镜的一第二反射镜，将所述指纹影像产生于所述影像感测模块。
优选地，所述采集平台是一玻璃。
优选地，所述感应电极是一透明导电膜、一双面软式电路板或一印刷电路板的其中一种。
本发明提供的指纹撷取设备，利用电容感测模块以及光学式指纹撷取的混合结构，具有低耗能且能提供使用者更舒适的使用情境的优点。
附图说明
图1为本发明实施例的一指纹撷取设备的示意图。
图2为本发明实施例的另一指纹撷取设备的示意图。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
请参考图1，图1为本发明实施例一指纹撷取设备10的示意图。指纹撷取设备10包含一电容感测模块102、一影像感测模块104、一发光组件106以及一反射模块108。电容感测模块102用来采集一指纹并且产生一参考信号S，其包含一采集平台110及一感应电极112。采集平台110为一手指按压处，感应电极112根据指纹的按压而满足一电容变化量时，产生参考信号S，例如，当使用者的手指按压采集平台110(如玻璃面或压克力板)时，感应电极112，例如，氧化铟锡(Indium Tin Oxide，ITO)或其他透明导电膜等，根据指纹的按压满足一电容变化量时，产生参考信号S。影像感测模块104连接于电容感测模块102的感应电极112，当影像感测模块104接收到来自感应电极112的参考信号S后，启动发光组件106发出一照明光束，并产生手指的指纹影像。而反射模块108将来自发光组件106的照明光束导向影像感测模块104，使得指纹影像产生于影像感测模块104。如此一来，本发明的指纹撷取设备，可不需持续启动发光组件，而仅需利用电容感测模块启动发光组件，进而有效降低功耗，并且提供使用者更舒适的使用情境。
详细来说，在一实施例中，指纹撷取设备10的反射模块108包含一棱镜114及一聚光组件116，其中，棱镜114用来将发光组件106所发出的照明光束，通过棱镜114将按压于采集平台110的指纹的纹峰(Finger Ridge)与纹谷(Finger Valley)反射后，再通过聚光组件116，例如一凸透镜，将指纹影像产生于影像感测模块104。具体而言，当手指按压于采集平台110(例如，玻璃面或压克力板)时，造成感应电极112(例如，透明导电膜)满足电容变化量时，感应电极112产生参考信号S。接着，当影像感测模块104接收到满足电 容变化量的参考信号S后，启动发光组件106的照明光束，并且通过棱镜114以及聚光组件116的反射及聚焦，使得影像感测模块104产生指纹影像。如此一来，通过手指的按压电容感测模块以启动发光组件，使得发光组件不需持续或间歇性地发光，进而节省指纹撷取设备的功耗，以及改善使用者的使用的便利性。
在另一实施例中，请参考图2。图2为本发明实施例的另一指纹撷取设备20的示意图。指纹撷取设备20是由图1的指纹撷取设备10所衍生，指纹撷取设备20包含一电容感测模块202、一影像感测模块204、一发光组件206及一反射模块208。其中，电容感测模块202包含一采集平台210及一感应电极212，采集平台210为用来接受手指的按压，感应电极212为根据手指的按压满足电容变化量时，产生参考信号S，例如，双面软式电路板(Flexible Print Circuit，FPC)、印刷电路板(Printed Circuit Board，PCB)或其他不透明导电膜等。指纹撷取设备20与指纹撷取设备10不同的地方在于，反射模块208为由反射镜214及216所组成，在此例中，反射镜214分别与采集平台210与感应电极212存在有一夹角A小于90度，反射镜216所在的位置大致与反射镜214平行，但是，反射镜214及216设置的位置会随着影像感测模块204的位置不同而改变，但不限于此。也就是说，只要是能将指纹的影像透过反射镜214及216反射后，将指纹影像成像于影像感测模块204上，皆属本发明之范畴。具体而言，当手指按压于采集平台210(例如，玻璃面或压克力板)后，造成感应电极212(如印刷电路板)满足电容变化量时，产生参考信号S。接着，影像感测模块204接收到满足电容变化量的参考信号S后，启动发光组件206的照明光束，并且通过反射镜214及反射镜216的反射，将指纹的纹峰与纹谷影像产生于影像感测模块204。此外，与指纹撷取设备10相较之下，指纹撷取设备20不需使用棱镜来反射指纹影像于影像感测模块204上，因此，可大幅节省装置的体积并且应用于移动手持装置。如此一来，通过手指的按压造成感应电 极的电容变化以启动发光组件，使得发光组件不需持续或间歇性地发光，以达到节省指纹撷取设备的消耗功耗，并且改善使用者的使用情境。
需注意的是，前述实施例是用以说明本发明的概念，本领域技术人员可据以做不同的修饰，不限于此。举例来说，反射镜摆设的位置以及方式可根据不同使用情境或应用于不同的装置上做不同的变化、根据手指按压所造成感应电极的电容变化量，进而产生的参考信号可根据实验数据的统计、计算机随机或人为设定而改变，不以此为限。皆属本发明的范畴。
综上所述，本发明提供一种电容与光学式指纹的混合侦测装置，使指纹撷取设备可以不需持续或间歇性地开启发光组件，仅需于必要时开启发光组件以进行指纹撷取，以达到低功耗并且提升使用者使用的舒适度的优点。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (9)

  1. 一种指纹撷取设备，其特征在于，包括：
    一电容感测模块，包括：
    一采集平台，用来接受一手指按压；以及
    一感应电极，用来根据所述手指按压，产生一参考信号；以及
    一影像感测模块，连接于所述感应电极，用来于所述感应电极产生所述参考信号后，启动一发光组件发出一照明光束，以产生所述手指的一指纹影像。
  2. 如权利要求1所述的指纹撷取设备，其特征在于，当所述感应电极受到所述手指按压且造成所述感应电极产生一电容变化量时，产生所述参考信号。
  3. 如权利要求1或2中任一项所述的指纹撷取设备，其特征在于，还包括：
    一反射模块，用来将来自所述发光组件的所述照明光束导向所述影像感测模块，以产生所述指纹影像。
  4. 如权利要求3所述的指纹撷取设备，其特征在于，所述反射模块包含一棱镜及一聚光组件。
  5. 如权利要求3所述的指纹撷取设备，其特征在于，所述反射模块包含多个反射镜。
  6. 如权利要求4所述的指纹撷取设备，其特征在于，当所述反射模块由所述棱镜及所述聚光组件组合而成时，所述照明光束通过所述棱镜及所述聚光组件的反射，将所述指纹影像产生于所述影像感测模块。
  7. 如权利要求5所述的指纹撷取设备，其特征在于，当所述反射模块由所述多个反射镜组合而成时，所述多个反射镜的一第一反射镜分别与所述采集平台与所述感应电极存在一夹角小于90度，使得所述照明光束通过所述第一反射镜与所述多个反射镜的一第二反射镜，将所述指纹影像产生于所述影像感测模块。
  8. 如权利要求1-7中任一项所述的指纹撷取设备，其特征在于，所述采集平台是一玻璃。
  9. 如权利要求1-7中任一项所述的指纹撷取设备，其特征在于，所述感应电极是一透明导电膜、一双面软式电路板或一印刷电路板的其中一种。
PCT/CN2016/101420 2016-10-01 2016-10-01 指纹撷取设备 WO2018058694A1 (zh)

Priority Applications (5)

Application Number Priority Date Filing Date Title
KR1020177031884A KR20180050600A (ko) 2016-10-01 2016-10-01 지문 캡처링 장치
CN201680001056.6A CN106462759A (zh) 2016-10-01 2016-10-01 指纹撷取设备
EP16898151.2A EP3333760A4 (en) 2016-10-01 2016-10-01 Fingerprint capture device
PCT/CN2016/101420 WO2018058694A1 (zh) 2016-10-01 2016-10-01 指纹撷取设备
US15/784,201 US10621403B2 (en) 2016-10-01 2017-10-16 Fingerprint capturing device

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US10621403B2 (en) 2020-04-14
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US20180096184A1 (en) 2018-04-05
EP3333760A1 (en) 2018-06-13

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