WO2020133719A1 - 指纹识别传感模组和显示面板 - Google Patents

指纹识别传感模组和显示面板 Download PDF

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Publication number
WO2020133719A1
WO2020133719A1 PCT/CN2019/078145 CN2019078145W WO2020133719A1 WO 2020133719 A1 WO2020133719 A1 WO 2020133719A1 CN 2019078145 W CN2019078145 W CN 2019078145W WO 2020133719 A1 WO2020133719 A1 WO 2020133719A1
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WIPO (PCT)
Prior art keywords
layer
electrode
sensor module
substrate
display panel
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Ceased
Application number
PCT/CN2019/078145
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English (en)
French (fr)
Inventor
周永祥
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Wuhan China Star Optoelectronics Technology Co Ltd
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Wuhan China Star Optoelectronics Technology Co Ltd
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Priority to US16/335,261 priority Critical patent/US11281879B2/en
Publication of WO2020133719A1 publication Critical patent/WO2020133719A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1637—Details related to the display arrangement, including those related to the mounting of the display in the housing
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F3/043—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using propagating acoustic waves
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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 OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer

Definitions

  • the present application relates to the technical field of display panels, in particular to a fingerprint identification sensor module and a display panel using the fingerprint identification sensor module.
  • Ultrasonic fingerprint recognition technology because it is not disturbed by water and oil pollution, has a stronger environmental adaptability and can be applied to more complex environments. Therefore, currently, ultrasonic fingerprint recognition is gaining more and more attention and is increasingly used in various fields, such as improving the safety of electronic products such as mobile phones, computers, tablets and access control systems.
  • the existing ultrasonic fingerprint identification technology is to apply a voltage to the piezoelectric thin film layer (or piezoelectric material layer) to make the piezoelectric thin film layer emit high-frequency vibration to generate ultrasonic waves. Subsequently, the ultrasonic wave is reflected by the finger and returns to the piezoelectric thin film layer and is converted into an electrical signal for identification by the piezoelectric thin film layer. Because the intensity of the ultrasonic signals reflected by the ridges and valleys of the fingers is different, the electrical signals converted by the piezoelectric thin film layer are also different, and thus the fingerprint images can be recognized.
  • the purpose of the present application is to provide a fingerprint recognition sensor module that absorbs the energy of the piezoelectric material layer by providing a damping layer, thereby reducing the number of pulse wave cycles.
  • a fingerprint recognition sensor module which includes: a first electrode and a second electrode disposed oppositely, and a piezoelectric material layer interposed between the first electrode and the second electrode , A damping layer provided on a surface of the first electrode, and a support layer, the first electrode is provided on the support layer and supported by the support layer; wherein, the support layer includes a A resonance cavity, the first electrode is not supported by the support layer in the region of the resonance cavity; and, the damping layer is provided in:
  • the first electrode faces away from the piezoelectric material layer.
  • the present application also provides a fingerprint recognition sensing module, which includes: a first electrode and a second electrode oppositely disposed, a piezoelectric material layer interposed between the first electrode and the second electrode, and, A damping layer provided on a surface of the first electrode.
  • the damping layer is disposed on the surface of the first electrode facing the piezoelectric material layer, so that the damping layer is sandwiched between the first electrode and the piezoelectric material layer between.
  • the damping layer is disposed on the surface of the first electrode facing away from the piezoelectric material layer.
  • the fingerprint recognition sensing module further includes a support layer, the first electrode is disposed on the support layer and supported by the support layer; wherein, the support layer includes a In a resonance cavity, the first electrode is not supported by the support layer in the region of the resonance cavity.
  • the material of the damping layer is selected from the group consisting of butyl rubber, acrylate rubber, nitrile rubber, silicone rubber, nitrile rubber and silicone rubber blend, polyurethane, polyvinyl chloride and epoxy resin One or a mixture of several.
  • the piezoelectric material layer is selected from aluminum nitride, lead zirconate titanate, polyvinylidene fluoride, or polyvinylidene fluoride-trifluoroethylene copolymer.
  • the support layer is an insulating layer.
  • the present application also provides a display panel, including: a first substrate and at least one fingerprint identification sensor module; wherein the fingerprint identification sensor module is disposed on the first substrate.
  • the first substrate has a display area and a non-display area
  • the fingerprint recognition sensor module is disposed in the non-display area or the display area of the first substrate.
  • the display panel further includes: a display element layer disposed on the first substrate and covering the fingerprint recognition sensor module; and, a second substrate, The second substrate is disposed on the display element layer, so that the second substrate and the first substrate face each other to form the display panel.
  • the display panel further includes a touch layer disposed on a surface of the second substrate.
  • the touch layer is disposed on the surface of the second substrate facing the display element layer, so that the touch layer is interposed between the display element layer and the second substrate between.
  • the touch layer is disposed on the surface of the second substrate facing away from the display element layer.
  • the display element layer is an organic electroluminescence layer or a liquid crystal display layer.
  • the damping layer is provided to absorb the energy of the piezoelectric material layer, thereby reducing the number of pulse wave cycles.
  • the energy absorption of the damping layer when the piezoelectric material layer starts to vibrate is not obvious, but as the vibration process progresses, the effect of absorbing energy becomes more and more obvious. Therefore, the impact on the first pulse wave of the piezoelectric material layer is not large, and it will not have a significant impact on the signal-to-noise ratio. Since the damping layer can obviously absorb the energy of the later pulse wave, the longitudinal resolution of the ultrasonic fingerprint recognition is improved. Therefore, the use of the fingerprint identification sensing module described in this application can significantly reduce the difficulty of subsequent analysis and identification of ultrasonic fingerprint valleys and ridges, and simplify the corresponding algorithm, thereby further improving the identification speed.
  • FIG. 1A and 1B are schematic structural diagrams of a fingerprint recognition sensor module according to an embodiment
  • FIG. 2 is a schematic structural diagram of a fingerprint recognition sensor according to an embodiment
  • FIG. 3 is a schematic structural diagram of a display panel according to an embodiment
  • FIG. 4 is a schematic structural diagram of a display panel according to another embodiment.
  • the first feature “above” or “below” the second feature may include the first and second features in direct contact, or may include the first and second features Not direct contact but contact through another feature between them.
  • the first feature is “above”, “above” and “above” the second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
  • the first feature is “below”, “below”, and “below” the second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is less horizontal than the second feature.
  • the present application provides a fingerprint recognition sensor module 1, as shown in FIGS. 1A and 1B.
  • the fingerprint recognition sensor module 1 can form the fingerprint recognition sensor 2 shown in FIG. 2 or can be integrated into a structure of a display panel as shown in FIGS. 3 and 4.
  • the fingerprint recognition sensing module 1 includes: a first electrode 11 and a second electrode 12 that are oppositely disposed, sandwiched between the first electrode 11 and the second electrode 12 Piezoelectric material layer 13, damping layer 14 and support layer 15.
  • the damping layer 14 is disposed on the surface of the first electrode 11 facing the piezoelectric material layer 13, so that the damping layer 14 is sandwiched between the first Between an electrode 11 and the piezoelectric material layer 13.
  • the supporting layer 15 is disposed on the surface of the first electrode 11 facing away from the damping layer 14, and is used to support the first electrode 11 and the damping layer 14 disposed on the first electrode 11.
  • the damping layer 14 is disposed on the surface of the first electrode 11 facing away from the piezoelectric material layer 13.
  • the supporting layer 15 is disposed on the surface of the damping layer 14 facing away from the first electrode 11, and is used for supporting the damping layer 14 and the first electrode 11 and the first electrode 11 disposed on the damping layer 14.
  • the support layer 15 includes a resonance cavity 151, the first electrode 11 (shown in FIG. 1A) and/or the damping layer 14 disposed on the support layer 15 (Shown in FIG. 1B) It is not supported by the support layer 15 in the area of the resonance cavity 15.
  • the resonant cavity 15 is used to enhance the amplitude of the piezoelectric material layer 13.
  • the material of the damping layer 14 is selected from the group consisting of butyl rubber, acrylate rubber, nitrile rubber, silicone rubber, nitrile rubber and silicone rubber blend, polyurethane, polyvinyl chloride and epoxy resin One or a mixture of several.
  • the material of the damping layer 14 may also be any damping material known in the art that has a good damping effect and is suitable in the range of -50 to 200°C.
  • first electrode 11 and the second electrode 12 may be made of any suitable electrode material known in the art, such as but not limited to one of Ag, Al, Mo, Au, Cr, Ni, Cu, Pt A metal or an alloy of several metals.
  • the piezoelectric material layer 13 may be made of any suitable piezoelectric material known in the art, such as but not limited to aluminum nitride (AlN), lead zirconate titanate (PZT), polyvinylidene fluoride (PVDF) , Or one of polyvinylidene fluoride-trifluoroethylene copolymer (P(VDF-TrFE)).
  • AlN aluminum nitride
  • PZT lead zirconate titanate
  • PVDF polyvinylidene fluoride
  • PVDF-TrFE polyvinylidene fluoride-trifluoroethylene copolymer
  • the insulating layer 15 may be made of any suitable insulating material known in the art, such as but not limited to silicon dioxide (SiO 2 ).
  • the fingerprint identification sensor module 1 described in this application can form a fingerprint identification sensor 2 as shown in FIG. 2.
  • FIG. 2 shows the fingerprint identification sensor module 1 with one layer.
  • the fingerprint identification sensor module 1 shown in FIG. 2 has the features shown in FIGS. 1A and 1B. The complete structure shown.
  • the fingerprint identification sensor 2 includes a circuit substrate 21, the fingerprint identification sensor module 1 disposed on the circuit substrate 21, and a protective layer 22.
  • the circuit substrate 21 and the fingerprint identification sensor module 1 can be connected by a suitable adhesive layer (not shown) known in the art.
  • the circuit substrate 21 may be a thin film transistor array substrate with a control function known in the art, including drive lines and detection lines.
  • the drive line continuously applies a high-frequency AC transmission voltage to at least one of the first electrode 11 and the second electrode 12 of the fingerprint identification sensor module 1 shown in FIGS. 1A and 1B, so that the The piezoelectric material layer 13 generates ultrasonic waves and is amplified through the resonance cavity 151.
  • the damping layer 14 will obviously absorb mechanical energy, thereby significantly reducing the number of ultrasonic cycles.
  • the drive line is switched to the detection line. Due to the difference in the amplitude of the ultrasonic waves reflected by the valleys and ridges of the fingers, the echo returned by the second electrode 12 acts on the piezoelectric generated on the piezoelectric material layer 13 The effects are also different, and thus different voltage signals are generated on the first electrode 11 for identifying fingerprints.
  • the fingerprint identification sensor module 1 described in this application can be applied to a display panel, as shown in FIGS. 3 and 4.
  • the display panel 3 includes a first substrate 31, and the fingerprint identification sensor module 1 is disposed on the first substrate 31.
  • the fingerprint recognition sensor module 1 is disposed on the first substrate 31.
  • a fingerprint recognition sensor module 1 For example, the display panel 3 has a display area and a non-display area, and the first substrate 31 has a display area and a non-display area correspondingly.
  • the fingerprint recognition sensor module 1 may be installed in the non-display area or in the display area.
  • the display panel 3 further includes: a display element layer 33 disposed on the first substrate 31 and covering the fingerprint recognition sensor module 1, and disposed on the display The second substrate 32 on the element layer 33.
  • the first substrate 31 and the second substrate 32 are boxed to form the display panel 3.
  • the display panel 3 further includes a touch layer 34.
  • the touch layer 34 may be disposed on the surface of the second substrate 32 facing the display element layer 33 so that the touch layer 34 is interposed between the display element layer 33 and the second substrate Between 32, as shown in Figure 3.
  • the touch layer 34 may also be disposed on the surface of the second substrate 32 facing away from the display element layer 33, as shown in FIG. 4.
  • the display panel 3 can be a liquid crystal display panel or an OLED display panel.
  • the display panel 3 is a liquid crystal display panel; and when the display element layer 33 is an organic electroluminescence layer, the display panel 3 is an OLED display panel.
  • liquid crystal display panel As an example.
  • the display panel 3 is a liquid crystal display panel, the first substrate 31 is an array substrate, the second substrate 32 is a color filter substrate, and the display element layer 33 is a liquid crystal display layer.
  • the display panel 3 further includes a first polarizing film 35 and a second polarizing film 36, as shown in FIGS. 3 and 4.
  • the first polarizing film 35 is disposed on the surface of the first substrate 31 facing away from the display element layer 33, and the second polarizing film 35 is disposed on the second substrate 32 facing away from the display element On the surface of the layer 33, an in-cell mode liquid crystal display panel is formed.
  • the first polarizing film 35 is also disposed on the surface of the first substrate 31 facing away from the display element layer 33, and the second polarizing film 35 is disposed on the touch layer 34 facing away from the On the surface of the display element layer 33, an on-cell mode liquid crystal display panel is formed.
  • the display panel 3 may further include a protective layer 37 formed on the second substrate 32 and an adhesive layer 38 for bonding the protective layer 37.
  • the second substrate 32 represents an encapsulation film layer, and the first polarizing film 35 and the Second polarizing film 36.
  • the subject of this application can be manufactured and used in industry and has industrial applicability.

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Abstract

一种指纹识别传感模组，包括：相对设置的一第一电极和一第二电极，夹设于所述第一电极和第二电极之间的压电材料层，以及，设置于所述第一电极的一表面上的阻尼层。

Description

指纹识别传感模组和显示面板 技术领域
本申请涉及显示面板技术领域，特别涉及一种指纹识别传感模组及使用该指纹识别传感模组的显示面板。
 背景技术
超声波指纹识别技术因不受水和油污干扰，而具有更强的环境适应能力，可以被应用于更加复杂的环境。因此，目前超声波指纹识别逐渐得到广泛的重视，被越来越多地用于各个领域，如提升手机、电脑、平板和门禁系统等电子产品的安全性。
与传统的数字密码相比，指纹解锁的快速性给日常生活带来很多的便利。但是当前超声波指纹传感器的性能并不尽如人意。
现有的超声波指纹识别技术是通过向压电薄膜层（或压电材料层）施加电压，使压电薄膜层发射高频振动以产生超声波。随后，超声波经手指反射后回到所述压电薄膜层并由所述压电薄膜层转换为用于识别的电信号。由于经手指的脊和谷反射后的超声波信号强度不同，使得经压电薄膜层转换得到的电信号也不同，进而可以实现识别指纹图像。
 技术问题
然而，由于超声波的脉冲波循环次数很多，且脉冲回波会增加反射的超声波数量，因此，当不同脉冲波之间的间隔较小时，不同信号之间的叠加使得超声波回声之间难以区分，增加了分辨超声波纵向不同脉冲波的难度，给后期的指纹分析和识别造成了巨大的困难。
因此，需要一种新的指纹识别传感器，以提高纵向分辨率。
 技术解决方案
本申请的目的在于提供一种指纹识别传感模组，通过设置阻尼层吸收压电材料层的能量，进而减少脉冲波的循环次数。
为了达到上述目的，提供一种指纹识别传感模组，包括：相对设置的一第一电极和一第二电极，夹设于所述第一电极和第二电极之间的一压电材料层，设置于所述第一电极的一表面上的阻尼层，以及，一支撑层，所述第一电极设置于所述支撑层上并由所述支撑层支撑；其中，所述支撑层包括一谐振空腔，所述第一电极在所述谐振空腔的区域中不被所述支撑层支撑；并且，所述阻尼层被设置于：
(a) 所述第一电极面对所述压电材料层的表面上，使得所述阻尼层夹设于所述第一电极与所述压电材料层之间；或者，
(b) 所述第一电极背离所述压电材料层的表面上。
本申请还提供一种指纹识别传感模组，包括：相对设置的一第一电极和一第二电极，夹设于所述第一电极和第二电极之间的压电材料层，以及，设置于所述第一电极一表面上的阻尼层。
在一实施例中，所述阻尼层设置于所述第一电极面对所述压电材料层的表面上，使得所述阻尼层夹设于所述第一电极与所述压电材料层之间。
在一实施例中，所述阻尼层设置于所述第一电极背离所述压电材料层的表面上。
在本申请一实施例中，所述指纹识别传感模组还包括一支撑层，所述第一电极设置于所述支撑层上并由所述支撑层支撑；其中，所述支撑层包括一谐振空腔，所述第一电极在所述谐振空腔的区域中不被所述支撑层支撑。
在一实施例中，所述阻尼层的材料选自丁基橡胶、丙烯酸酯橡胶、丁腈橡胶、硅橡胶、丁腈橡胶和硅橡胶共混物、聚氨酯、聚氯乙烯和环氧树脂中的一种或几种混合。
在一实施例中，所述压电材料层的材料选择氮化铝、锆钛酸铅、聚偏氟乙烯、或聚偏氟乙烯-三氟乙烯共聚物中的一种。
在一实施例中，所述支撑层为一绝缘层。
本申请还提供一种显示面板，包括：一第一基板，以及至少一上述指纹识别传感模组；其中，所述指纹识别传感模组设置于所述第一基板上。
在一实施例中，所述第一基板具有一显示区和一非显示区，所述指纹识别传感模组设置于所述第一基板的非显示区内或显示区内。
在一实施例中，所述显示面板还包括：一显示元件层，所述显示元件层设置于所述第一基板上并覆盖所述指纹识别传感模组；以及，一第二基板，所述第二基板设置于所述显示元件层上，使得所述第二基板与所述第一基板对盒以形成所述显示面板。
在一实施例中，所述显示面板还包括一触控层，所述触控层设置于所述第二基板的一表面上。
在一实施例中，所述触控层设置于所述第二基板面对所述显示元件层的表面上，使得所述触控层夹设于所述显示元件层与所述第二基板之间。
在一实施例中，所述触控层设置于所述第二基板背离所述显示元件层的表面上。
在一实施例中，所述显示元件层为有机电致发光层或液晶显示层。
 有益效果
在本申请中，通过设置阻尼层吸收压电材料层的能量，进而减少脉冲波的循环次数。此外，所述阻尼层在压电材料层振动开始的时候对其能量的吸收并不明显，而是随着振动的过程进行，吸收能量的效果越来越明显。因此，对压电材料层发生第一个脉冲波的影响并不大，不会对信噪比有明显的影响。由于所述阻尼层可以明显吸收后期脉冲波的能量，进而提高超声波指纹识别的纵向分辨率。因此，利用本申请所述的指纹识别传感模组可以明显降低后续对于超声波指纹谷和脊的分析和识别难度，并简化相应的算法，从而进一步提高识别速度。
 附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1A和图1B为根据一实施例的指纹识别传感模组的结构示意图；
图2为根据一实施例的指纹识别传感器的结构示意图；
图3为根据一实施例的显示面板的结构示意图；
图4为根据另一实施例的显示面板的结构示意图。
 本发明的实施方式
下面详细描述本发明的实施方式，所述实施方式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方式是示例性的，仅用于解释本发明，而不能理解为对本发明的限制。
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之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，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”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
下文的公开提供了许多不同的实施方式或例子用来实现本发明的不同结构。为了简化本发明的公开，下文中对特定例子的部件和设置进行描述。当然，它们仅仅为示例，并且目的不在于限制本发明。此外，本发明可以在不同例子中重复参考数字和/或参考字母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设置之间的关系。此外，本发明提供了的各种特定的工艺和材料的例子，但是本领域普通技术人员可以意识到其他工艺的应用和/或其他材料的使用。
为了避免因不必要的细节而无法清晰地展现本申请所述的指纹识别传感模组及显示面板，在附图中仅示出了与本申请相关的主要部件。本领域技术人员可以理解的是，即使附图中省略了，但本申请所述的显示面板还包括其他常规结构。
本申请提供一种指纹识别传感模组1，如图1A和图1B所示。该指纹识别传感模组1可以形成如图2所示的指纹识别传感器2，也可以如图3及图4所示的集成于一显示面板的结构中。
如图1A和图1B所示，所述指纹识别传感模组1包括：相对设置的第一电极11和一第二电极12，夹设于所述第一电极11和第二电极12之间的压电材料层13，阻尼层14和支撑层15。
在一实施例中，如图1A所示，所述阻尼层14设置于所述第一电极11面对所述压电材料层13的表面上，使得所述阻尼层14夹设于所述第一电极11与所述压电材料层13之间。所述支撑层15设置于所述第一电极11背离所述阻尼层14的表面上，用于支撑所述第一电极11以及设置于所述第一电极11上的所述阻尼层14、所述压电材料层13及所述第二电极12。
在另一实施例中，如图1B所示，所述阻尼层14设置于所述第一电极11背离所述压电材料层13的表面上。所述支撑层15则设置于所述阻尼层14背离所述第一电极11的表面上，用于支撑所述阻尼层14以及设置于所述阻尼层14上的所述第一电极11、所述压电材料层13及所述第二电极12。
如图1A及图1B所示，所述支撑层15包括一谐振空腔151，设置于所述支撑层15上的所述第一电极11（图1A所示）和/或所述阻尼层14（图1B所示）在所述谐振空腔15的区域中不被所述支撑层15支撑。本领域技术人员可以理解的是，所述谐振空腔15用于增强所述压电材料层13的振幅。
在本申请中，所述阻尼层14的材料选自丁基橡胶、丙烯酸酯橡胶、丁腈橡胶、硅橡胶、丁腈橡胶和硅橡胶共混物、聚氨酯、聚氯乙烯和环氧树脂中的一种或者几种混合。本领域技术人员可以理解的是，所述阻尼层14的材料也可以是具有良好阻尼效果且在-50～200℃范围内适用的任何本领域已知的阻尼材料。
此外，所述第一电极11和第二电极12可以由任何本领域已知的合适的电极材料制成，例如但不限于Ag，Al，Mo，Au，Cr，Ni，Cu，Pt中的一种金属或者几种金属的合金。
所述压电材料层13可以是由任何本领域已知的合适的压电材料制成，例如但不限于氮化铝（AlN）、锆钛酸铅（PZT）、聚偏氟乙烯（PVDF），或者聚偏氟乙烯-三氟乙烯共聚物（P(VDF-TrFE)）中的一种。
所述绝缘层15可以由任何本领域已知的合适的绝缘材料制成，例如但不限于二氧化硅（SiO 2）。
本申请所述的指纹识别传感模组1可以形成一指纹识别传感器2，如图2所示。为了清晰的目的，图2中以一层表示所述指纹识别传感模组1，本领域技术人员可以理解的是，图2中所示指纹识别传感模组1具有图1A和图1B所示的完整结构。
如图2所示，所述指纹识别传感器2包括一电路基板21，设置于所述电路基板21上的所述指纹识别传感模组1，以及保护层22。本领域技术人员可以理解的是，所述电路基板21与所述指纹识别传感模组1之间可以通过本领域已知的合适的粘结层（图中未示）连接。所述电路基板21可以是本领域已知的具有控制功能的薄膜晶体管阵列基板，包括驱动线和检测线。在超声波发射阶段，驱动线对图1A和图1B所示的指纹识别传感模组1的第一电极11及所述第二电极12中的至少一个持续施加高频交流发射电压，使得所述压电材料层13产生超声波并通过所述谐振空腔151被放大。所述阻尼层14会明显地吸收机械能，从而使得超声波循环次数明显减少。在接收超声波阶段，驱动线切换为检测线，由于手指的谷和脊反射的超声波振幅不同，使得所述第二电极12回馈来的回波作用在所述压电材料层13上产生的压电效应也不同，进而所述第一电极11上产生了不同的电压信号，用于识别指纹。
本申请所述的指纹识别传感模组1可以应用于显示面板中，如图3和图4所示。
如图3和图4所示，所述显示面板3包括第一基板31，所述指纹识别传感模组1设置于所述第一基板31上。为了清晰的目的，在图3和图4中仅显示了一个指纹识别传感模组1，本领域技术人员可以理解的是，可以根据实际需要在所述第一基板31上的任意位置设置任意个指纹识别传感模组1。例如，所述显示面板3具有一显示区和一非显示区，所述第一基板31对应具有一显示区和一非显示区。所述指纹识别传感模组1可以设置于非显示区内，也可以设置于显示区内。
如图3和图4所示，所述显示面板3还包括：设置于所述第一基板31上并覆盖所述指纹识别传感模组1的显示元件层33，以及，设置于所述显示元件层33上的第二基板32。所述第一基板31与所述第二基板32对盒以形成所述显示面板3。为了实现触控的效果，所述显示面板3还包括一触控层34。所述触控层34可以是设置于所述第二基板32面对所述显示元件层33的表面上，使得所述触控层34夹设于所述显示元件层33与所述第二基板32之间，如图3所示。所述触控层34也可以是设置于所述第二基板32背离所述显示元件层33的表面上，如图4所示。
本领域技术人员可以理解的是，所述显示面板3可以是液晶显示面板，也可以是OLED显示面板。当所述显示元件层33为液晶显示层时，所述显示面板3为液晶显示面板；而当所述显示元件层33为有机电致发光层时，所述显示面板3则为OLED显示面板。
以下，以液晶显示面板为例说明一较佳实施例。
所述显示面板3为一液晶显示面板，所述第一基板31为阵列基板，所述第二基板32为彩色滤光片基板，所述显示元件层33为液晶显示层。所述显示面板3还包括第一偏光膜35和第二偏光膜36，如图3和图4所示。
如图3所示，所述第一偏光膜35设置于第一基板31背离所述显示元件层33的表面上，所述第二偏光膜35设置于所述第二基板32背离所述显示元件层33的表面上，形成in-cell模式的液晶显示面板。
如图4所示，所述第一偏光膜35也设置于第一基板31背离所述显示元件层33的表面上，所述第二偏光膜35则设置于所述触控层34背离所述显示元件层33的表面上，形成on-cell模式的液晶显示面板。
当然，如图3和图4所示，所述显示面板3还可以包括形成于所述第二基板32上的保护层37，以及用于粘结所述保护层37的粘结层38。
本领域技术人员可以理解的是，当图3和图4所示的显示面板3为OLED显示面板时，所述第二基板32代表封装膜层，且不需要设置所述第一偏光膜35和第二偏光膜36。
本申请已由上述相关实施例加以描述，然而上述实施例仅为实施本申请的范例。必需指出的是，已公开的实施例并未限制本申请的范围。相反地，包含于权利要求书的精神及范围的修改及均等设置均包括于本申请的范围内。
 工业实用性
本申请的主体可以在工业中制造和使用，具备工业实用性。

Claims (15)

  1. 一种指纹识别传感模组，包括：
    相对设置的一第一电极和一第二电极，
    夹设于所述第一电极和第二电极之间的一压电材料层，
    设置于所述第一电极的一表面上的阻尼层；以及，
    一支撑层，所述第一电极设置于所述支撑层上并由所述支撑层支撑；
    其中，所述支撑层包括一谐振空腔，所述第一电极在所述谐振空腔的区域中不被所述支撑层支撑；并且，
    所述阻尼层被设置于：
    (a) 所述第一电极面对所述压电材料层的表面上，使得所述阻尼层夹设于所述第一电极与所述压电材料层之间；或者，
    (b) 所述第一电极背离所述压电材料层的表面上。
  2. 如权利要求1所述的指纹识别传感模组，其中，所述阻尼层的材料选自丁基橡胶、丙烯酸酯橡胶、丁腈橡胶、硅橡胶、丁腈橡胶和硅橡胶共混物、聚氨酯、聚氯乙烯和环氧树脂中的一种或几种混合。
  3. 一种指纹识别传感模组，包括：相对设置的一第一电极和一第二电极，夹设于所述第一电极和第二电极之间的压电材料层，以及，设置于所述第一电极的一表面上的阻尼层。
  4. 如权利要求3所述的指纹识别传感模组，其中，所述阻尼层设置于所述第一电极面对所述压电材料层的表面上，使得所述阻尼层夹设于所述第一电极与所述压电材料层之间。
  5. 如权利要求3所述的指纹识别传感模组，其中，所述阻尼层设置于所述第一电极背离所述压电材料层的表面上。
  6. 如权利要求3所述的指纹识别传感模组，其中，所述指纹识别传感模组还包括一支撑层，所述第一电极设置于所述支撑层上并由所述支撑层支撑；其中，所述支撑层包括一谐振空腔，所述第一电极在所述谐振空腔的区域中不被所述支撑层支撑。
  7. 如权利要求3所述的指纹识别传感模组，其中，所述阻尼层的材料选自丁基橡胶、丙烯酸酯橡胶、丁腈橡胶、硅橡胶、丁腈橡胶和硅橡胶共混物、聚氨酯、聚氯乙烯和环氧树脂中的一种或几种混合。
  8. 如权利要求3所述的指纹识别传感模组，其中，所述压电材料层的材料选择氮化铝、锆钛酸铅、聚偏氟乙烯、或聚偏氟乙烯-三氟乙烯共聚物中的一种。
  9. 一种显示面板，包括：一第一基板，以及至少一如权利要求3所述的指纹识别传感模组；其中，所述指纹识别传感模组设置于所述第一基板上。
  10. 如权利要求9所述的显示面板，其中，指纹识别传感模组的所述阻尼层被设置于：
    (a) 所述第一电极面对所述压电材料层的表面上，使得所述阻尼层夹设于所述第一电极与所述压电材料层之间；或者，
    (b) 所述第一电极背离所述压电材料层的表面上。
  11. 如权利要求9所述的显示面板，其中，所述第一基板具有一显示区和一非显示区，所述指纹识别传感模组设置于所述第一基板的非显示区内或显示区内。
  12. 如权利要求9所述的显示面板，其中，所述显示面板还包括：一显示元件层，所述显示元件层设置于所述第一基板上并覆盖所述指纹识别传感模组；以及，一第二基板，所述第二基板设置于所述显示元件层上，使得所述第二基板与所述第一基板对盒以形成所述显示面板。
  13. 如权利要求12所述的显示面板，其中，所述显示面板还包括一触控层，所述触控层设置于所述第二基板的一表面上。
  14. 如权利要求13所述的显示面板，其中，所述触控层设置于所述第二基板面对所述显示元件层的表面上，使得所述触控层夹设于所述显示元件层与所述第二基板之间。
  15. 如权利要求13所述的显示面板，其中，所述触控层设置于所述第二基板背离所述显示元件层的表面上。
PCT/CN2019/078145 2018-12-29 2019-03-14 指纹识别传感模组和显示面板 Ceased WO2020133719A1 (zh)

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