CN107958199B - Fingerprint detection module, display device and electronic equipment - Google Patents
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Abstract
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Description
Translated fromChinese【技术领域】【Technical field】
本发明涉及指纹识别技术领域，尤其涉及一种指纹检测模组、显示器件及电子设备。The invention relates to the technical field of fingerprint identification, in particular to a fingerprint detection module, a display device and an electronic device.
【背景技术】【Background technique】
目前，指纹识别技术已经广泛应用在移动终端、智能家居、打击犯罪等多个领域。给人们的生活带来了很多的便利和安全。现在主流的指纹识别技术有光指纹识别，电容式指纹识别和超声波指纹识别，但是它们也有各自的缺点，例如光指纹识别和电容式指纹识别在手指有油污，灰尘，水等物质时，就容易无法解析指纹图像；而超声波指纹识别对于应用环境的要求没那么高，因此超声波指纹识别得到广泛应用。At present, fingerprint recognition technology has been widely used in mobile terminals, smart homes, crime fighting and other fields. It brings a lot of convenience and safety to people's lives. At present, the mainstream fingerprint recognition technologies include optical fingerprint recognition, capacitive fingerprint recognition and ultrasonic fingerprint recognition, but they also have their own shortcomings, such as optical fingerprint recognition and capacitive fingerprint recognition, when the finger has oil, dust, water and other substances. The fingerprint image cannot be parsed; and ultrasonic fingerprint recognition has less requirements for the application environment, so ultrasonic fingerprint recognition is widely used.
但是，现有的检测模组的结构都十分复杂，集成度较低。However, the structures of the existing detection modules are very complex and the integration is low.
【发明内容】[Content of the invention]
针对上述问题，本发明提供一种指纹检测模组、显示器件及电子设备。In view of the above problems, the present invention provides a fingerprint detection module, a display device and an electronic device.
本发明解决技术问题的方案是提供一种指纹检测模组，其用于设置在显示模组用于显示的一侧的相对侧，其实现指纹识别，压力感测和触控识别中的至少一种功能，从靠近显示模组朝远离显示模组的方向，所述指纹检测模组包括依次叠层设置的上电极层、压电层、下电极层、不导电基板和电路板，所述电路板分别与上电极层、下电极层电性连接，所述指纹检测模组的尺寸与显示模组的尺寸相当；所述指纹检测模组进行指纹识别的工作周期包括发射阶段和接收阶段，发射阶段对所述上电极层和所述下电极层同时施加电压信号并调节所述上电极层的电势高于所述下电极层的电势，以使所述压电层两侧形成一电势差并发出超声波，接收阶段所述压电层接收反射回来的不同能量损耗的超声波并产生不同的电信号；所述上电极层和下电极层至少一层包括多个阵列排布的导电块，以使手指的一个谷脊周期对应多个导电块，所述导电块与电路板电性连接。The solution to the technical problem of the present invention is to provide a fingerprint detection module, which is arranged on the opposite side of the side of the display module used for display, which realizes at least one of fingerprint recognition, pressure sensing and touch recognition. The fingerprint detection module includes an upper electrode layer, a piezoelectric layer, a lower electrode layer, a non-conductive substrate and a circuit board that are stacked in sequence from the direction close to the display module to the direction away from the display module. The board is electrically connected to the upper electrode layer and the lower electrode layer, respectively, and the size of the fingerprint detection module is equivalent to the size of the display module; the working cycle of the fingerprint detection module for fingerprint identification includes an emission stage and a reception stage. In this stage, a voltage signal is applied to the upper electrode layer and the lower electrode layer at the same time, and the potential of the upper electrode layer is adjusted to be higher than that of the lower electrode layer, so that a potential difference is formed on both sides of the piezoelectric layer and emits Ultrasonic, in the receiving stage, the piezoelectric layer receives the reflected ultrasonic waves withdifferent energy losses and generates different electrical signals; at least one layer of the upper electrode layer and the lower electrode layer includes a plurality of conductive blocks arranged in an array, so that the finger One valley-ridge period of the corresponding to a plurality of conductive blocks, the conductive blocks are electrically connected with the circuit board .
优选地，所述指纹检测模组进一步包括信号处理层，所述信号处理层设置在电路板远离不导电基板的表面上且与电路板电性连接。Preferably, the fingerprint detection module further includes a signal processing layer, the signal processing layer is disposed on the surface of the circuit board away from the non-conductive substrate and is electrically connected to the circuit board.
优选地，所述压电层为原位极化的铁电聚合物薄膜。Preferably, the piezoelectric layer is an in-situ polarized ferroelectric polymer film.
优选地，所述不导电基板靠近检测模块的表面的边缘区域设置有多个引脚，所述下电极层与引脚电性连接，所述电路板与引脚电性连接。Preferably, a plurality of pins are provided in the edge region of the non-conductive substrate close to the surface of the detection module, the lower electrode layer is electrically connected with the pins, and the circuit board is electrically connected with the pins.
优选地，所述上电极层和下电极层包括阵列分布的导电块，所述上下电极层的导电块之间尺寸一致、位置一一对应。Preferably, the upper electrode layer and the lower electrode layer include conductive blocks distributed in an array, and the conductive blocks of the upper and lower electrode layers have the same size and correspond to each other in one-to-one positions.
本发明还提供一种显示器件，所述显示器件包括显示模组和如上所述的指纹检测模组，所述显示模组的其中一个表面为供用户进行操作的触摸面，与触摸面相对的另一个面上设置所述指纹检测模组，所述显示模组的尺寸与指纹检测模组的尺寸相当。The present invention also provides a display device, the display device includes a display module and the above fingerprint detection module, one of the surfaces of the display module is a touch surface for a user to operate, and the surface opposite to the touch surface The fingerprint detection module is arranged on the other surface, and the size of the display module is equivalent to that of the fingerprint detection module.
优选地，所述电路板与显示模组电性连接，所述信号处理层驱动显示模组工作。Preferably, the circuit board is electrically connected to the display module, and the signal processing layer drives the display module to work.
优选地，所述显示模组为OLED或者TFT。Preferably, the display module is OLED or TFT.
本发明还提供一种电子设备，包括如上所述的指纹检测模组。The present invention also provides an electronic device, comprising the above fingerprint detection module.
与现有技术相比，本发明的其用于设置在显示模组用于显示的一侧的相对侧，其实现指纹识别，压力感测和触控识别中的至少一种功能，从靠近显示模组朝远离显示模组的方向，所述指纹检测模组包括依次叠层设置的上电极层、压电层、下电极层、不导电基板和电路板，所述电路板分别与上电极层、下电极层电性连接，所述指纹检测模组的尺寸与显示模组的尺寸相当。本发明的指纹检测模组不仅具有结构简单，可靠性高的优点，更加符合电子设备轻薄化、集成度高的趋势，而且可以进行全屏指纹识别、触控识别和压力检测，功能多样。Compared with the prior art, in the present invention, it is arranged on the opposite side of the display module used for display, and realizes at least one function of fingerprint recognition, pressure sensing and touch recognition. The module faces the direction away from the display module, and the fingerprint detection module includes an upper electrode layer, a piezoelectric layer, a lower electrode layer, a non-conductive substrate and a circuit board that are stacked in sequence, and the circuit board is respectively connected to the upper electrode layer. , the lower electrode layer is electrically connected, and the size of the fingerprint detection module is equivalent to the size of the display module. The fingerprint detection module of the present invention not only has the advantages of simple structure and high reliability, but also conforms to the trend of thin and light electronic equipment and high integration, and can perform full-screen fingerprint recognition, touch recognition and pressure detection, and has various functions.
另外的，本发明的所述压电层为原位极化的铁电聚合物薄膜，具有压电效应好、分辨率高的优点。In addition, the piezoelectric layer of the present invention is an in-situ polarized ferroelectric polymer film, which has the advantages of good piezoelectric effect and high resolution.
与现有技术相比，本发明的显示器件包括显示模组和如上所述的指纹检测模组，所述显示模组的其中一个表面为供用户进行操作的触摸面，与触摸面相对的另一个面上设置所述指纹检测模组，所述显示模组的尺寸与指纹检测模组的尺寸一致。本发明的显示器件不仅具有结构简单，可靠性高的优点，更加符合电子设备轻薄化、集成度高的趋势，而且可以进行全屏指纹识别、触控识别和压力检测，功能多样。Compared with the prior art, the display device of the present invention includes a display module and the above-mentioned fingerprint detection module, wherein one surface of the display module is a touch surface for the user to operate, and the other surface opposite to the touch surface. The fingerprint detection module is arranged on one surface, and the size of the display module is consistent with the size of the fingerprint detection module. The display device of the invention not only has the advantages of simple structure and high reliability, but also conforms to the trend of thin and light electronic equipment and high integration, and can perform full-screen fingerprint recognition, touch recognition and pressure detection, and has various functions.
与现有技术相比，本发明的电子设备，其包括如上所述的指纹检测模组。本发明的电子设备具有集成度高，可靠性高，更轻薄的优点，而且可以进行全屏指纹识别、触控识别和压力检测，功能多样。Compared with the prior art, the electronic device of the present invention includes the fingerprint detection module as described above. The electronic device of the present invention has the advantages of high integration, high reliability, and is thinner and lighter, and can perform full-screen fingerprint recognition, touch recognition and pressure detection, and has various functions.
【附图说明】【Description of drawings】
图1是本发明第一实施例的显示器件的叠层结构示意图。FIG. 1 is a schematic diagram of a laminated structure of a display device according to a first embodiment of the present invention.
图2是本发明第一实施例的显示模块的叠层结构示意图。FIG. 2 is a schematic diagram of a laminated structure of a display module according to the first embodiment of the present invention.
图3是本发明第一实施例的显示器件的一种变形的叠层结构示意图。FIG. 3 is a schematic diagram of a modified laminated structure of the display device according to the first embodiment of the present invention.
图4是本发明第一实施例的显示器件进行压力检测时的叠层结构示意图。FIG. 4 is a schematic diagram of the stacked structure of the display device according to the first embodiment of the present invention when pressure detection is performed.
图5是本发明第二实施例的显示器件的叠层结构示意图。FIG. 5 is a schematic diagram of a laminated structure of a display device according to a second embodiment of the present invention.
图6是本发明第二实施例的第一压电模组的叠层结构示意图。FIG. 6 is a schematic diagram of a laminated structure of a first piezoelectric module according to a second embodiment of the present invention.
图7是本发明第二实施例的第二压电模组的叠层结构示意图。FIG. 7 is a schematic diagram of a laminated structure of a second piezoelectric module according to a second embodiment of the present invention.
【具体实施方式】【Detailed ways】
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实例，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用以解释本发明，并不用于限定本发明。In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and implementation examples. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.
第一实施例first embodiment
请参考图1，本发明的第一实施例提供一种显示器件10，所述显示器件10包括指纹检测模组10a、粘胶层12和显示模组13，所述显示模组13的其中一个表面为供用户进行操作的触摸面131，与触摸面131相对的另一个面上设置有粘胶层12，粘胶层12与指纹检测模组10a粘合以增强指纹检测模组10a与显示模组13的连接强度，所述指纹检测模组10a的尺寸与显示模组13的尺寸相当，所述指纹检测模组10a不仅可以进行指纹识别，而且可以进行全屏触控和压力检测。所述显示模组13可以是市场现有的一些包括显示层、盖板玻璃等基本结构的显示模组，但优选为包括OLED(有机发光二极管)或者TFT(薄膜晶体管)的显示模组。可以理解，所述粘胶层12可以省略，所述显示模组13靠近指纹检测模组10a的表面本身具有粘性，所述显示模组13直接与指纹检测模组10a粘接即可。(本发明中所提及的上下左右等方位词仅限于指定视图上的相对位置，而非绝对位置，可以理解，指定视图在平面内进行180°旋转后，位置词“下”即可以替换为位置词“上。”)Referring to FIG. 1, a first embodiment of the present invention provides a
所述指纹检测模组10a包括检测模块11、升压电路层14、不导电基板15、电路板17、信号处理层18以及连接器19，所述检测模块11、不导电基板15和电路板17依次叠放形成叠层结构，其中检测模块11靠近显示模组13设置，不导电基板15位于检测模块11和电路板17之间，所述检测模块11与电路板17电性连接，所述电路板17还用于与外部电路电性连接。所述检测模块11可进行超声波信号和电信号之间的转换，所述信号处理层18、所述升压电路层14以及所述连接器19间隔设置在电路板17远离不导电基底15的表面上且均与电路板17电性连接，所述信号处理层18用于收集检测模块11传输过来的电信号并对电信号进行分析，所述升压电路层14用于对电路板17输出的电压信号进行升高，所述连接器19用于与外部电路电性连接。可以理解，所述信号处理层18可以是至少一个处理芯片，所述至少一个信号处理芯片可以执行指纹识别、触控识别和压力检测中的一种或多种功能；也可以是多个处理芯片间隔设置在电路板17上，每个处理芯片执行指纹识别、触控识别和压力检测中的一种或多种功能。可以理解，所述电路板17可以是印刷电路板、柔性电路板(FlexiblePrinted Circuit，简称FPC)或者其他具有导电结构的电路板，在本发明中优选为电路板17为柔性电路板，从而可以减小指纹检测模组10a的厚度。可以理解，所述连接器19优选为FPC连接器，使电路板17与外部电路的电性连接更稳固。还可以理解，所述不导电基板15优选为玻璃。The
可以理解，优选的，在所述不导电基板15靠近指纹检测模组11的表面的边缘区域设置有多个引脚151，所述电路板17与该引脚151电性连接，所述检测模块11与引脚151电性连接。电路板17与引脚151通过焊接的方式实现电性连接，稳固性更好，电性连接的可靠性较佳。It can be understood that, preferably, a plurality of
请一并参考图1和图2，所述检测模块11包括上电极层111、压电层113和下电极层115，所述上电极层111和下电极层115分别设置在压电层113相对的两个表面上，其中上电极层111靠近显示模组13设置，所述上电极层111和下电极层115分别与电路板17电性连接。所述下电极层115包括多个呈阵列排布的电极块1153，多个电极块1153是设置在不导电基板15靠近检测模块11的表面上，所述多个电极块1153与多个引脚151对应地电性连接，从而实现电极块1153与电路板17的电性连接。所述多个电极块1153用于进行超声波信号的感应，由于手指的一个谷脊周期的宽度通常为300um，通过设置电极块1153的尺寸有利于保证识别的指纹的清晰度，从而确保指纹识别的精确性。优选的，所述电极块1153的面积小于或者等于70μm*70μm，进一步优选为小于或者等于60μm*60μm，更进一步优选40μm*40μm，电极块1153的尺寸在此范围内时，指纹识别效果最佳。可以理解，所述上电极层111也可以是包括多个阵列排布的电极块1153，且所述上电极层111的电极块1153的尺寸、位置与下电极层115的电极块1153的尺寸、位置一致。也可以理解，所述上电极层111和下电极层115之一为阵列排布的电极块1153即可实现指纹识别功能，当上电极层111包括多个阵列排布的电极块1153时，所述下电极层115可以为一整层电极。Please refer to FIG. 1 and FIG. 2 together. The
压电层113为压电膜，优选的，压电层113为铁电聚合物薄膜，在一具体的实施方式中，所述铁电聚合物薄膜是通过采购现有的铁电聚合物薄膜成品，然后再通过粘附在基底上来进行极化而得到。通常，这种成品的铁电聚合物薄膜需要先被拉升具有一定应力然后再通过粘合在基底上再进行极化，此种方法形成的铁电聚合物薄膜厚度均在30μm以上，不适应现有电子器件轻薄的发展趋势，而且采用这种极化膜的检测模块，由于压电感测膜太厚，因此分辨率较低。上述实施方式中的铁电聚合物薄膜极化方法大都是直接在铁电聚合物薄膜的上下表面之间设置高压电场来进行，但是因为铁电聚合物薄膜本身厚度的不均，所以可能容易被高压电场所击穿，压电膜113的生产合格率十分低，不利于大规模生产，而且制得的压电膜113的压电效应较差，使用寿命较短。The
在另一具体的实施方式中，本发明的压电层113优选为原位极化形成的铁电聚合物薄膜，具体为所述压电层113是在带有电极块1153的不导电基板15的一面上原位形成压电膜113，所述压电膜113包括相对的第一表面和第二表面，所述第一表面即为靠近不导电基板15的一面，所述第二表面为靠近上电极层111的表面。极化时候，使该压电膜113的第一表面电势为零；在所述压电膜113的第二表面所在侧提供第一电场及第二电场，第一电场的电势高于第二电场的电势；在第一电场的作用下电离所述压电膜113第二表面所在的一侧的环境气体，该环境气体穿过第二电场而聚集在压电膜113的第二表面，使所述压电膜113内形成沿薄膜厚度方向的膜内电场，对所述压电膜113进行极化形成所述压电层113。可以理解，所述铁电聚合物薄膜通过化学气相沉积，涂覆、浸涂等湿化学方法形成在下电极层115表面，因此可以形成厚度很薄且均匀的铁电聚合物薄膜，厚度可以小于30μm，优选的，厚度可以维持在9μm以下，从而减小信号的传输损耗，形成工艺简单，而且，采用这种原位形成的极化膜的检测模块11，分辨率大大提高。所述压电层113的厚度可进一步为小于9μm，再进一步地，其厚度可为1.5-7.4μm、1.9-7.2μm、2.2-8.6μm、2.8-8.4μm或者3.6-6.6μm，更进一步地，可以具体是1.8μm、2.4μm、2.6μm、3.7μm、3.9μm、4.2μm、4.6μm、5.6μm、5.8μm、6.7μm、8.6μm、8.7μm。In another specific embodiment, the
再者，本发明相较于直接在压电层113的上下表面设置电极的极化方法，上述虚拟极化方法不会使压电层113直接承受所施加的高压电场，能避免压电层113被击穿。具体的，上述极化可采用离子体极化(具体可参见申请号为201710108374.9的中国专利申请)或X射线极化(具体可参见申请号为201611222575.3的中国专利申请)的方式形成所述压电层，所形成的压电层113能够做到很薄，而且，本发明的压电层113的压电效应较好以及使用寿命长，能够很好的适用在检测模块11中，利于实现检测模块11较好的识别效果。在此具体实施方式中，进行了原位极化的所述压电层113的压电常数d33的范围为20-35pC/N，进一步优选为25～29pC/N。Furthermore, compared with the polarization method of directly disposing electrodes on the upper and lower surfaces of the
可以理解，所述压电层113的材料为铁电聚合物材料，具体可选用但不限于：聚偏氟乙烯，聚氯乙烯，聚-γ-甲基-L-谷氨酸酯，聚碳酸酯、聚偏氟乙烯、聚偏二氟乙烯PVDF、聚偏二氟乙烯三氟乙烯PVDF-TrFE、聚甲基丙烯酸甲酯PMMA、聚四氟乙烯TEFLON等共聚物中的一种或者几种的组合。It can be understood that the material of the
在本发明的一些实施例中，所述压电层113的材料选用聚偏氟乙烯的共聚物为聚偏氟乙烯-三氟乙烯共聚物，具体的为聚偏二氟乙烯三氟乙烯PVDF-TrFE，为了获得压电效应较好的压电层，所述聚偏二氟乙烯与三氟乙烯的质量比的范围是(60-95)：(5-30)，优选地，其质量比的范围是(75-86)：(15-25)，进一步优选地，其质量比为80：20或75：25或70：30，所述聚偏二氟乙烯和三氟乙烯共聚物较单独选用聚偏二氟乙烯可降低成本，且其还具有较好的压电效应。In some embodiments of the present invention, the material of the
所述铁电聚合物薄膜极化后所得的压电膜113内既有α相晶粒也有β相晶粒以及非晶态物质，β相的含量与压电膜113的压电效应相对应，当β相晶粒占总晶粒的含量为60-70％时，极化膜即具有较好的压电效应，β相的含量越高极化膜的压电效应越好。然而过度极化会产生多余的不必要的电荷等，这些多余电荷容易与聚合物表面上的其他电荷重新结合，从而影响所得压电膜的性能。在本实施例中，所述高分子压电膜113的β相晶粒与总晶粒质量比为60～70％。The
请参考图3，可以理解，通常显示模组13中都会包含一个驱动芯片，其可以驱动显示模组13工作。作为一种变形，电路板17可以与显示模组13电性连接，可以将显示模组13的驱动芯片的功能集成到信号处理层18上，从而信号处理层18既能进行电信号的收集和分析以实现指纹识别、触控识别以及压力检测功能，又能驱动显示模组13工作，不仅降低了整个显示器件10的厚度，节约了生产成本，而且提高了电子元器件的集成度，更加符合精密制造的需求。Please refer to FIG. 3 , it can be understood that the
本实施例的指纹检测模组10a的尺寸与显示模组13的尺寸相当，因此其可以进行全屏超声波指纹识别，在显示模组13的任意位置处触摸均可以进行指纹识别。指纹检测模组10a的一个工作周期包括发射阶段和接收阶段两部分。发射阶段，外部电路依次通过电路板17同时分别给予上电极层111和下电极层115电压信号，当给予上电极层111的电压信号高于给予下电极层115的电压信号时，无需再通过升压电路层14对给予上电极层111的电压信号进行升高；当给予上电极层111和下电极层115相同的电压信号时，升压电路层13对电路板17传输给上电极层111的电压信号进行升高；当上电极层111的电势高于下电极层115的电势时，压电层113的两侧形成一电势差，进而产生机械振动并发出超声波，此时外部电路已停止给予上电极层111和下电极层115电压信号；接收阶段，压电层113发出的超声波接触到手指后反射，由于指纹谷处与指纹脊处相比存在更多的空气，因此手指的指纹谷和指纹脊处反射的信号强度不同，通常指纹谷所反射的超声波的能量会比指纹脊所反射的超声波能量大，即指纹谷所反射的信号强度要强于指纹脊所反射的信号强度，压电层113接收到指纹谷和指纹脊所反射回来的不同超声波信号从而产生不同的电信号，通过设置电极块1153的尺寸，使手指的一个谷脊周期对应于多个电极块1153，因此，分别对应于指纹谷和指纹脊的电极块1153由于静电耦合的作用产生不同数量的感应电荷，信号处理层18通过检测感应电荷的数量的差异来实现指纹识别，最后将检测结果通过电路板17传递给外部电路。The size of the
可以理解，为了方便检测压电层113接收显示模组13反射回来的超声波信号，需要设置一定的时间差来避免向显示模组13传播的超声波信号和显示模组13反射回来的超声波信号混合，从而确保检测的精准度。例如，外部电路按照一定的时间规律给压电层113提供电势差以发出超声波信号。It can be understood that, in order to facilitate the detection of the
本发明实施例的指纹检测模组10a还可以进行触控识别。所述信号处理层18集成有触控芯片的功能，在显示模组13的表面未发生触摸的情况下，压电层113所发出的超声波信号会被显示模组13的表面反射，压电层113可以检测到反射回来的超声波信号并产生电信号，而电极块1153由于静电耦合的作用会产生一定数量的感应电荷；如图1所示，在显示模组13的表面发生触摸的情况时，由于触摸物(例如用户的手指，图1中仅示出用户手指的部分指纹，详见图中的锯齿状线条)与显示模组13的表面之间的接触可以使部分超声波信号透过显示模组13进入该触摸物中，因此压电层113接收到的触摸位置显示模组13反射回来的超声波信号会发生变化，从而压电层113在触摸位置处产生的电信号会发生变化，从而对应位置处的电极块1153产生的感应电荷的数量也会发生变化，而未被触摸的位置处显示模组13反射回来的超声波信号未发生变化，从而未被触摸位置处对应的电极块1153产生的感应电荷的数量未发生变化，因此，通过信号处理层18检测被触摸位置处与未被触摸位置处的感应电荷的数量是否发生变化来判断出触摸位置，即实现超声波触控。The
本发明实施例的指纹检测模组10a还可以进行压力感测，下面结合图4来进行压力感测原理的说明。如图4所示，当手指施加压力时，压电层113会发生形变，当施加的压力大小不一样时，压电层113的形变程度不一样，从而电极块1153产生的感应电荷的数量就不一样，压电层113的形变程度越大时，电极块1153产生的感应电荷的数量就更多；压电层113的形变程度越小时，电极块1153产生的感应电荷的数量就更少；因此，信号处理层18通过检测电极块1153产生的感应电荷的数量大小来确定压力大小，即实现压力检测。可以理解，所述信号处理层18可以是多个芯片的集成，从而实现不同信号的检测与分析进而使指纹检测模组10a可以实现指纹识别，压力感测以及触控等功能之一种或多种。The
本发明的第一实施例还提供一种电子设备，其采用如上所述的指纹检测模组10a或显示器件11。所述电子设备包括但不限于手机、电脑、平板电脑、考勤机等刷指纹的设备。The first embodiment of the present invention also provides an electronic device, which adopts the
第二实施例Second Embodiment
请参考图5，本发明的第二实施例还提供另一种结构的显示器件20，所述显示器件20包括呈层叠结构的盖板21、第一压电模组20a、第二压电模组21a、显示模组22、粘胶层23、不导电基板25及电路板27。所述盖板21的其中一个表面为供用户进行操作的触摸面2111，与触摸面2111相对的另一个面上设置有第一压电模组20a。所述第一压电模组20a和第二压电模组21a设置在显示模组22相背的两个表面上，所述粘胶层23设置在显示模组22远离盖板21的表面上且位于第二压电模组21a和显示模组22之间。所述不导电基板25设置在第二压电模组21a远离显示模组22的表面上。所述电路板27设置在不导电基板25远离显示模组22的表面上。可以理解，所述第一压电模组20a和第二压电模组21a两者的位置可以进行对换。所述第一压电模组20a和第二压电模组21a均与电路板27电性连接。所述第一压电模组20a、第二压电模组21a、显示模组22以及盖板21的尺寸相当。可以理解，所述粘胶层23可以省略，所述显示模组22靠近第二压电模组21a的表面本身有粘性，所述显示模组22直接与第二压电模组21a粘接即可。(本实施例中所提及的上下左右等方位词仅限于指定视图上的相对位置，而非绝对位置，例如，可以理解，指定视图在平面内进行180°旋转后，位置词“下”即可以替换为位置词“上”。)Please refer to FIG. 5 , the second embodiment of the present invention further provides a
可以理解，所述盖板21为透明材质，且盖板16的材质的声阻抗和显示模块17的声阻抗相近，优选为玻璃。所述电路板27可以是印刷电路板、柔性电路板或者其他具有导电结构的电路板，在本发明中优选为电路板27为柔性电路板。还可以理解，所述不导电基板25优选为玻璃。It can be understood that the
可以理解，所述显示器件20进一步包括信号处理层28、升压电路层24和连接器29，所述信号处理层28、升压电路层24和连接器29间隔设置在电路板27远离不导电基板25的表面上且与电路板27电性连接。It can be understood that the
请一并参考图5和图6，所述第一压电模组20a包括第一电极层211、第一压电层213和第二电极层215，所述第一电极层211和第二电极层215设置在第一压电层213两个相背的表面上，且所述第一电极层211远离显示模组22设置，所述第一电极层211和第二电极层215均与电路板27电性连接。第一电极层211和第二电极层215两者中至少有其一包括多个阵列排布的第一导电块2153，当第一电极层211和第二电极层215两者均包括多个阵列排布的第一导电块2153时，第一电极层211的第一导电块2153和第二电极层215的第一导电块2153尺寸一致、位置一一对应。由于第一压电模组20a设置在显示模组22靠近盖板21的一侧，故而第一电极层211、第一压电层213和第二电极层215均由透明材质制成。可以理解，所述第一电极层211和第二电极层215可以是氧化铟锡、氧化铟镓锌等透明导电金属氧化物，所述第一压电层213的材料可以是透明铁电压电陶瓷或者透明聚偏氟乙烯压电材料等。Please refer to FIG. 5 and FIG. 6 together, the first
请一并参考图5和图7，所述第二压电模组21a包括第三电极层221、第二压电层223和第四电极层225，所述第三电极层221和第四电极层225设置在第二压电层223两个相背的表面上，且第三电极层221靠近显示模组22设置，所述第三电极层221和第四电极层225均与电路板27电性连接。第三电极层221和第四电极层225两者中至少有其一包括多个阵列排布的第二导电块2253，当第三电极层221和第四电极层225两者均包括多个阵列排布的第二导电块2253时，第三电极层221的第二导电块2253和第四电极层225的第二导电块2253尺寸一致、位置一一对应。可以理解，在本实施例中，第四电极层225的第二导电块2253是形成在不导电基板25靠近显示模组22的表面上的。Please refer to FIG. 5 and FIG. 7 together, the second
可以理解，所述第一导电块2153和第二导电块2253与第一实施例中的导电块1153是一样的，故在此不再赘述。It can be understood that the first
可以理解，所述第一压电层213和第二压电层223均为压电膜，优选的，第一压电层213和第二压电层223均为原位极化的铁电聚合物薄膜。在本实施例中，第一压电层213是在第二电极层215上进行原位极化得到的，第二压电层223是带有电极块2253的不导电基板25上原位形成的，在关于原位极化的内容与第一实施例中一致，故在此不再赘述。It can be understood that the first
可以理解，在不导电基板25靠近检测模块21的表面的边缘区域设置有多个引脚251，所述第四电极层215的第二导电块2253分别与引脚251电性连接，所述电路板27与引脚251电性连接。通过设置引脚251来实现第二电极块2253与电路板27的电性连接，既可以减少加工难度，不用将第二电极块2253一一个单独地与电路板电性连接，而且引脚251可以做成块状的，在电路板27与引脚251连接更稳固，可靠性更高，而且工艺简单。It can be understood that a plurality of
本实施例的显示器件20可以实现不同的压电模组执行不同的功能，第一压电模组20a和第二压电模组21a均可以执行压力检测、触控识别和指纹检测功能中的一种或多种。本实施例的信号处理层可以控制第一压电模组20a和第二压电模组21a执行不同的功能，例如，第一压电模组20a执行压力检测功能，第二压电模组21a执行触控识别和指纹检测功能；或第一压电模组20a执行压力检测、触控识别，第二压电模组21a执行指纹识别。作为优选的，第一压电模组20a执行压力检测功能，第二压电模组21a执行触控和指纹识别功能，因为其靠近盖板21设置，对压力的感应最为灵敏，执行压力检测时更加精确。The
本实施例中的指纹识别、压力检测和触控识别过程的原理与第一实施例一致，故在此不再赘述。The principles of the fingerprint identification, pressure detection and touch identification processes in this embodiment are the same as those in the first embodiment, so they will not be repeated here.
本发明的第二实施例还提供一种电子设备，其采用如上所述的显示器件20。所述电子设备包括但不限于手机、电脑、平板电脑、考勤机等刷指纹的设备。The second embodiment of the present invention also provides an electronic device employing the
与现有技术相比，本发明的其用于设置在显示模组用于显示的一侧的相对侧，其实现指纹识别，压力感测和触控识别中的至少一种功能，从靠近显示模组朝远离显示模组的方向，所述指纹检测模组包括依次叠层设置的上电极层、压电层、下电极层、不导电基板和电路板，所述电路板分别与上电极层、下电极层电性连接，所述指纹检测模组的尺寸与显示模组的尺寸相当。本发明的指纹检测模组不仅具有结构简单，可靠性高的优点，更加符合电子设备轻薄化、集成度高的趋势，而且可以进行全屏指纹识别、触控识别和压力检测，功能多样。Compared with the prior art, in the present invention, it is arranged on the opposite side of the display module used for display, and realizes at least one function of fingerprint recognition, pressure sensing and touch recognition. The module faces the direction away from the display module, and the fingerprint detection module includes an upper electrode layer, a piezoelectric layer, a lower electrode layer, a non-conductive substrate and a circuit board that are stacked in sequence, and the circuit board is respectively connected to the upper electrode layer. , the lower electrode layer is electrically connected, and the size of the fingerprint detection module is equivalent to the size of the display module. The fingerprint detection module of the present invention not only has the advantages of simple structure and high reliability, but also conforms to the trend of thin and light electronic equipment and high integration, and can perform full-screen fingerprint recognition, touch recognition and pressure detection, and has various functions.
另外的，本发明的所述压电层为原位极化的铁电聚合物薄膜，具有压电效应好、分辨率高的优点。In addition, the piezoelectric layer of the present invention is an in-situ polarized ferroelectric polymer film, which has the advantages of good piezoelectric effect and high resolution.
与现有技术相比，本发明的显示器件包括显示模组和如上所述的指纹检测模组，所述显示模组的其中一个表面为供用户进行操作的触摸面，与触摸面相对的另一个面上设置所述指纹检测模组，所述显示模组的尺寸与指纹检测模组的尺寸一致。本发明的显示器件不仅具有结构简单，可靠性高的优点，更加符合电子设备轻薄化、集成度高的趋势，而且可以进行全屏指纹识别、触控识别和压力检测，功能多样。Compared with the prior art, the display device of the present invention includes a display module and the above-mentioned fingerprint detection module, wherein one surface of the display module is a touch surface for the user to operate, and the other surface opposite to the touch surface. The fingerprint detection module is arranged on one surface, and the size of the display module is consistent with the size of the fingerprint detection module. The display device of the invention not only has the advantages of simple structure and high reliability, but also conforms to the trend of thin and light electronic equipment and high integration, and can perform full-screen fingerprint recognition, touch recognition and pressure detection, and has various functions.
与现有技术相比，本发明的电子设备，其包括如上所述的指纹检测模组。本发明的电子设备具有集成度高，可靠性高，更轻薄的优点，而且可以进行全屏指纹识别、触控识别和压力检测，功能多样。Compared with the prior art, the electronic device of the present invention includes the fingerprint detection module as described above. The electronic device of the present invention has the advantages of high integration, high reliability, and is thinner and lighter, and can perform full-screen fingerprint recognition, touch recognition and pressure detection, and has various functions.
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，凡在本发明的原则之内所作的任何修改，等同替换和改进等均应包含本发明的保护范围之内。The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the principles of the present invention should be included within the protection scope of the present invention.
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| CN108960218A (en)* | 2018-09-25 | 2018-12-07 | 东莞新科技术研究开发有限公司深圳分公司 | A kind of ultrasonic fingerprint sensor and fingerprint recognition mould group |
| CN112711150B (en)* | 2020-12-22 | 2022-11-22 | 业泓科技(成都)有限公司 | Display device |
| CN113391724A (en)* | 2021-06-04 | 2021-09-14 | 江西欧迈斯微电子有限公司 | Pressure module, touch panel and electronic device |
| CN113642485A (en)* | 2021-08-18 | 2021-11-12 | 云谷（固安）科技有限公司 | Display panels and display devices |
| CN114035692A (en)* | 2021-11-12 | 2022-02-11 | 电子科技大学 | A gesture recognition keyboard, electronic device and preparation method thereof |
| CN114926867B (en)* | 2022-05-10 | 2025-01-24 | 维沃移动通信有限公司 | A detection method and electronic device |
| CN116092137A (en)* | 2023-01-18 | 2023-05-09 | 合肥维信诺科技有限公司 | Fingerprint detection module, display module and display device |
| CN117877077A (en)* | 2024-02-08 | 2024-04-12 | 深圳市汇顶科技股份有限公司 | Ultrasonic detection device and electronic apparatus |
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