技术领域Technical Field
本发明涉及显示技术领域，特别涉及一种超声指纹识别模组及显示装置。The present invention relates to the field of display technology, and in particular to an ultrasonic fingerprint recognition module and a display device.
背景技术Background Art
随着电子技术的飞速发展，超声指纹识别模组和柔性显示面板技术越来越广泛应用于电子产品中。超声指纹识别模组是一种通过采集指纹信息对用户进行身份验证的模块，它能够提高电子产品使用的安全性。超声指纹识别模组主要包括基板、电极层和压电材料层，电极层和压电材料层通常为耐弯折材料形成，不容易弯曲。With the rapid development of electronic technology, ultrasonic fingerprint recognition modules and flexible display panel technologies are increasingly widely used in electronic products. Ultrasonic fingerprint recognition modules are modules that authenticate users by collecting fingerprint information, which can improve the safety of electronic products. Ultrasonic fingerprint recognition modules mainly include substrates, electrode layers, and piezoelectric material layers. The electrode layers and piezoelectric material layers are usually made of bending-resistant materials and are not easy to bend.
柔性显示面板包括可弯折部分和非弯折部分，当前通常在非折叠部分设置超声指纹识别模组。The flexible display panel includes a bendable part and a non-bendable part. Currently, an ultrasonic fingerprint recognition module is usually set in the non-folding part.
发明内容Summary of the invention
本申请的目的为提供一种使用灵活性比较高的超声指纹识别模组、柔性显示面板及电子设备。The purpose of the present application is to provide an ultrasonic fingerprint recognition module, a flexible display panel and an electronic device with relatively high flexibility of use.
一方面，本申请提供一种超声指纹识别模组，包括柔性基板、超声波结构层以及弹性体，所述超声波结构层至少能够产生和接收超声波，所述超声波结构层位于所述柔性基板和所述弹性体之间；至少沿所述超声波结构层的厚度方向，所述超声波结构层与所述弹性体之间具有气腔，所述气腔内部设置有至少一个支撑体，所述支撑体一端抵靠所述弹性体另一端穿过所述超声波结构层抵靠所述柔性基板。On the one hand, the present application provides an ultrasonic fingerprint recognition module, including a flexible substrate, an ultrasonic structure layer and an elastomer, wherein the ultrasonic structure layer is at least capable of generating and receiving ultrasonic waves, and the ultrasonic structure layer is located between the flexible substrate and the elastomer; at least along the thickness direction of the ultrasonic structure layer, there is an air cavity between the ultrasonic structure layer and the elastomer, and at least one supporting body is arranged inside the air cavity, one end of the supporting body abuts against the elastomer, and the other end passes through the ultrasonic structure layer and abuts against the flexible substrate.
本申请中气腔壁与柔性基板之间支撑有支撑体，至少在超声指纹识别模组弯曲时，气腔壁能够通过支撑体支撑于柔性基板，这样气腔壁与超声波结构层之间在弯曲时也能够具有间隙，并且支撑体穿过超声波结构层，能够不与超声波结构层接触，通过合理设置支撑体的大小，保证整个超声波结构层所对应的像素区发射和采集的超声波信号正常，以实现指纹图像的正常采集。进而实现了超声指纹识别模组能够应用于显示装置的弯折区，大大提高了超声指纹识别模组应用的灵活性和通用性。In the present application, a support body is supported between the air cavity wall and the flexible substrate. At least when the ultrasonic fingerprint recognition module is bent, the air cavity wall can be supported on the flexible substrate through the support body, so that there can be a gap between the air cavity wall and the ultrasonic structure layer when bending, and the support body passes through the ultrasonic structure layer without contacting the ultrasonic structure layer. By reasonably setting the size of the support body, it is ensured that the ultrasonic signal emitted and collected by the pixel area corresponding to the entire ultrasonic structure layer is normal, so as to realize the normal collection of fingerprint images. In addition, the ultrasonic fingerprint recognition module can be applied to the bending area of the display device, which greatly improves the flexibility and versatility of the application of the ultrasonic fingerprint recognition module.
可选的，所述超声波结构层包括至少两个子结构单元，至少部分相邻所述子结构单元之间形成供所述支撑体穿过的通道，各所述子结构单元与所述弹性体之间具有所述气腔。Optionally, the ultrasonic structure layer includes at least two substructure units, a channel for the support body to pass through is formed between at least some adjacent substructure units, and the air cavity is provided between each substructure unit and the elastic body.
可选的，至少部分相邻所述子结构单元之间具有第一胶粘层，所述弹性体朝向所述柔性基板的表面具有凸起部，相邻所述凸起部和与其相对的所述第一胶粘层固定结合以形成所述支撑体。Optionally, a first adhesive layer is provided between at least some adjacent substructure units, a surface of the elastomer facing the flexible substrate has a protrusion, and adjacent protrusions are fixedly combined with the first adhesive layer opposite thereto to form the support body.
可选的，所述凸起部和与其固连的所述第一胶粘层二者在垂直于所述超声波结构层厚度方向的平面内的投影分别为第一投影和第二投影，所述第二投影覆盖所述第一投影。Optionally, projections of the protrusion and the first adhesive layer fixed thereto in a plane perpendicular to the thickness direction of the ultrasonic structure layer are respectively a first projection and a second projection, and the second projection covers the first projection.
可选的，所述弹性体朝向所述柔性基板的表面具有凸起部，所述凸起部的部分位于相邻所述子结构单元之间且与所述柔性基板结合固定，所述凸起部形成所述支撑体。Optionally, the surface of the elastic body facing the flexible substrate has a protrusion, part of the protrusion is located between adjacent sub-structure units and is combined and fixed to the flexible substrate, and the protrusion forms the support body.
可选的，相邻所述子结构单元通过连接段连接，相邻所述子结构单元、相邻连接段围成所述通道。Optionally, adjacent substructure units are connected via a connecting segment, and adjacent substructure units and adjacent connecting segments form the channel.
可选的，所述子结构单元朝向所述弹性体的侧面还覆盖有第二胶粘层，所述气腔形成于所述第二胶粘层和所述弹性体之间；Optionally, the side of the substructure unit facing the elastomer is further covered with a second adhesive layer, and the air cavity is formed between the second adhesive layer and the elastomer;
或者/和，所述子结构单元包括沿所述指纹识别模组厚度方向上堆叠的压电材料层和下电极层，所述超声波结构层的上电极层包括多个间隔排布的上电极单元，所述支撑体穿过相邻所述子结构单元之间通道及所述上电极单元之间通道连接所述柔性基板。Alternatively or/and, the substructure unit includes a piezoelectric material layer and a lower electrode layer stacked along the thickness direction of the fingerprint recognition module, the upper electrode layer of the ultrasonic structure layer includes a plurality of upper electrode units arranged at intervals, and the support body is connected to the flexible substrate through channels between adjacent substructure units and channels between the upper electrode units.
可选的，相邻所述支撑体、所述弹性体与所述柔性基板围成一个空腔，且各所述空腔相对独立，每一个所述空腔内部具有至少一个所述子结构单元。Optionally, the adjacent support bodies, the elastic bodies and the flexible substrate form a cavity, and each of the cavities is relatively independent, and each of the cavities has at least one substructure unit inside.
第二方面，本申请还提供了一种显示装置，包括柔性显示面板和上述任一项所述的超声指纹识别模组。In a second aspect, the present application also provides a display device, comprising a flexible display panel and the ultrasonic fingerprint recognition module described in any one of the above items.
可选的，相邻所述支撑体、所述弹性体与所述柔性基板围成一个空腔，每一个所述空腔内部具有至少一个所述子结构单元，距离所述柔性显示面板的弯折轴线越远，所述空腔横向宽度越大。Optionally, the adjacent support bodies, the elastic bodies and the flexible substrate form a cavity, each of the cavities has at least one substructure unit therein, and the farther from the bending axis of the flexible display panel, the larger the lateral width of the cavity.
可选的，距离所述柔性显示面板的弯折轴线越远，所述超声波结构层与所述弹性体之间的气腔高度越小。Optionally, the farther away from the bending axis of the flexible display panel, the smaller the height of the air cavity between the ultrasonic structure layer and the elastomer.
可选的，沿所述柔性显示面板的弯折轴线方向间隔布置有N行所述子结构单元，沿垂直于所述弯折轴线方向间隔布置有M列所述子结构单元；至少部分相邻列所述子结构单元之间具有所述支撑体。Optionally, N rows of the substructure units are arranged at intervals along the bending axis direction of the flexible display panel, and M columns of the substructure units are arranged at intervals along a direction perpendicular to the bending axis; and the support body is provided between at least some adjacent columns of the substructure units.
可选的，还包括衬板，所述柔性显示面板包括弯折区和非弯折区，所述超声指纹识别模组至少位于所述弯折区部分区域与所述衬板之间，所述柔性显示面板和所述衬板其他区域具有填充层，所述弹性体包括第一主体和第二主体，所述第一主体与所述超声波结构层相对用于形成所述气腔，所述第二主体自所述第一主体向外延伸，用于与所述填充层结合固定。Optionally, it also includes a backing plate, the flexible display panel includes a bending area and a non-bending area, the ultrasonic fingerprint recognition module is located at least between a part of the bending area and the backing plate, the flexible display panel and other areas of the backing plate have a filling layer, the elastomer includes a first body and a second body, the first body and the ultrasonic structure layer are opposite to each other to form the air cavity, and the second body extends outward from the first body to be combined and fixed with the filling layer.
可选的，所述第二主体设置有至少一个支撑凸台，用于与所述填充层结合固定，各所述支撑凸台间隔布置。Optionally, the second body is provided with at least one supporting boss for being combined and fixed with the filling layer, and the supporting bosses are arranged at intervals.
可选的，还包括第三胶层，所述填充层和所述柔性基板均通过所述第三胶层与所述柔性显示面板结合固定。Optionally, a third adhesive layer is further included, and the filling layer and the flexible substrate are both combined and fixed to the flexible display panel via the third adhesive layer.
本申请所提供的显示装置具有上述超声指纹识别模组，其也具有超声指纹识别模组的上述技术效果，在此不再赘述。The display device provided in the present application has the above-mentioned ultrasonic fingerprint recognition module, and it also has the above-mentioned technical effects of the ultrasonic fingerprint recognition module, which will not be repeated here.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1为本发明一种实施例中像素阵列的分布示意图；FIG1 is a schematic diagram showing the distribution of a pixel array in an embodiment of the present invention;
图2为本发明一种实施例中超声指纹识别模组安装于显示装置的局部示意图；FIG2 is a partial schematic diagram of an ultrasonic fingerprint recognition module installed on a display device in one embodiment of the present invention;
图3为本发明一种实施例中超声指纹识别模组的横截面图；FIG3 is a cross-sectional view of an ultrasonic fingerprint recognition module according to an embodiment of the present invention;
图4为本发明第二种实施例中超声指纹识别模组的横截面图；FIG4 is a cross-sectional view of an ultrasonic fingerprint recognition module in a second embodiment of the present invention;
图5为本发明第一种实施例中压电材料层的俯视图；FIG5 is a top view of a piezoelectric material layer in a first embodiment of the present invention;
图6为本发明第一种实施例中下电极层的俯视图；FIG6 is a top view of the lower electrode layer in the first embodiment of the present invention;
图7为本发明第一种实施例中超声波结构层的俯视图；FIG7 is a top view of an ultrasonic structural layer in a first embodiment of the present invention;
图8为本发明第一种实施例中弹性体的俯视图；FIG8 is a top view of an elastic body in a first embodiment of the present invention;
图9为本发明第二种实施例中压电材料层的俯视图；FIG9 is a top view of a piezoelectric material layer in a second embodiment of the present invention;
图10为本发明第二种实施例中下电极层的俯视图；FIG10 is a top view of the lower electrode layer in the second embodiment of the present invention;
图11为本发明第二种实施例中超声波结构层的俯视图；FIG11 is a top view of an ultrasonic structural layer in a second embodiment of the present invention;
图12为本发明第二种实施例中弹性体的俯视图；FIG12 is a top view of an elastic body in a second embodiment of the present invention;
图13为本发明一种实施例中第一胶层和凸起部的投影图；FIG13 is a projection diagram of the first adhesive layer and the protrusion in one embodiment of the present invention;
图14为本发明第三种实施例中超声指纹识别模组的横截面图；FIG14 is a cross-sectional view of an ultrasonic fingerprint recognition module in a third embodiment of the present invention;
图15为本发明第四种实施例中超声指纹识别模组的横截面图；FIG15 is a cross-sectional view of an ultrasonic fingerprint recognition module according to a fourth embodiment of the present invention;
图16为本发明第二种实施例中超声指纹识别模组安装于显示装置的局部示意图；FIG16 is a partial schematic diagram of an ultrasonic fingerprint recognition module installed on a display device in a second embodiment of the present invention;
图17为本发明第三种实施例中超声指纹识别模组安装于显示装置的局部示意图；FIG17 is a partial schematic diagram of an ultrasonic fingerprint recognition module installed on a display device in a third embodiment of the present invention;
图18为本发明第四种实施例中超声指纹识别模组安装于显示装置的局部示意图；FIG18 is a partial schematic diagram of an ultrasonic fingerprint recognition module installed on a display device in a fourth embodiment of the present invention;
图19为本发明另一种实施例中超声指纹识别模组的横截面局部示意图；FIG19 is a partial cross-sectional schematic diagram of an ultrasonic fingerprint recognition module in another embodiment of the present invention;
图20为本发明一实施例中弹性体的局部俯视图；FIG20 is a partial top view of an elastic body in one embodiment of the present invention;
图21为本发明另一实施例中弹性体的局部俯视图；FIG21 is a partial top view of an elastic body in another embodiment of the present invention;
图22为本发明第五种实施例中超声指纹识别模组安装于显示装置的局部示意图。FIG. 22 is a partial schematic diagram of an ultrasonic fingerprint recognition module installed on a display device in a fifth embodiment of the present invention.
其中，图1至图22中附图标记与部件名称之间的对应关系为：The corresponding relationship between the reference numerals and component names in FIGS. 1 to 22 is as follows:
100超声指纹识别装置、200显示屏、300衬板、400填充层、500胶层、600第三胶层、1柔性基板、2子结构单元、21压电材料层子单元、21a第一通道、22下电极层子单元；22a第二通道；3弹性体、301第一主体、302第二主体、31凸起部、32支撑凸台、4第一胶粘层、3a气腔、3a1第一气腔、3a11第一子气腔、3a2第二气腔、3a21第二子气腔、3a3第三气腔、3a4第四气腔、H1-H4气腔高度、L1至L4横向宽度、5第二胶粘层、6输入区、7上电极单元、8电路。100 ultrasonic fingerprint recognition device, 200 display screen, 300 backing plate, 400 filling layer, 500 adhesive layer, 600 third adhesive layer, 1 flexible substrate, 2 substructure unit, 21 piezoelectric material layer subunit, 21a first channel, 22 lower electrode layer subunit; 22a second channel; 3 elastomer, 301 first body, 302 second body, 31 protrusion, 32 supporting boss, 4 first adhesive layer, 3a air cavity, 3a1 first air cavity, 3a11 first sub-air cavity, 3a2 second air cavity, 3a21 second sub-air cavity, 3a3 third air cavity, 3a4 fourth air cavity, H1-H4 air cavity height, L1 to L4 lateral width, 5 second adhesive layer, 6 input area, 7 upper electrode unit, 8 circuit.
具体实施方式DETAILED DESCRIPTION
超声指纹识别模组包括基板、超声波结构层和气腔。超声波结构层结合固定于基板的背侧，超声波结构层至少能够产生和接收超声波，气腔形成于超声波结构层远离基板的一侧，气腔的作用是为了减弱向背侧(远离屏幕表面侧)发射的声波对向正面侧(屏幕表面侧)声波发射和声波接收的影响，向背侧发射的声波在气腔壁处的反射比较高，可以采用气腔壁附近入射反射相消的方式减弱背侧声波强度；也可以合理设计和选择覆盖层和下电极层的材料，使得声波在穿过这些材料时，声波强度尽可能减弱，进而减弱对正面侧声波接收的影响。当前该超声指纹识别模组中气腔的气腔壁在使用时容易与超声波结构层接触，接触位置对应像素区发射和采集的超声波信号就会异常，即如果向背侧的声波经反射再次被压电材料层接收，会影响从屏幕正面反射回压电材料的超声波信号，从而影响指纹特征信号的判别，进而影响采集到的指纹图像。The ultrasonic fingerprint recognition module includes a substrate, an ultrasonic structural layer and an air cavity. The ultrasonic structural layer is fixed to the back side of the substrate. The ultrasonic structural layer can at least generate and receive ultrasonic waves. The air cavity is formed on the side of the ultrasonic structural layer away from the substrate. The function of the air cavity is to weaken the influence of the sound waves emitted to the back side (away from the screen surface) on the sound wave emission and sound wave reception to the front side (screen surface side). The sound waves emitted to the back side are highly reflected at the air cavity wall. The intensity of the back side sound waves can be weakened by the way of incident reflection cancellation near the air cavity wall; the materials of the cover layer and the lower electrode layer can also be reasonably designed and selected so that the sound wave intensity is weakened as much as possible when the sound waves pass through these materials, thereby reducing the influence on the sound wave reception on the front side. At present, the air cavity wall of the air cavity in the ultrasonic fingerprint recognition module is easy to contact with the ultrasonic structural layer when in use, and the ultrasonic signal emitted and collected by the pixel area corresponding to the contact position will be abnormal, that is, if the sound wave to the back side is reflected and received by the piezoelectric material layer again, it will affect the ultrasonic signal reflected back from the front of the screen to the piezoelectric material, thereby affecting the discrimination of the fingerprint feature signal, and then affecting the collected fingerprint image.
故，当前超声指纹识别模组均设置于显示装置的非弯折区，这限制了超声指纹识别模组在能够弯曲的显示装置的应用。Therefore, currently, ultrasonic fingerprint recognition modules are all disposed in the non-bending area of the display device, which limits the application of ultrasonic fingerprint recognition modules in bendable display devices.
在上述发现的基础上，本发明进行了深入研究并提出了一种能够应用于显示装置的弯折区的超声指纹识别模组。Based on the above findings, the present invention has conducted in-depth research and proposed an ultrasonic fingerprint recognition module that can be applied to the bending area of a display device.
在本发明的描述中，需要说明的是，术语“中心”、“上”、“下”、“左”、“右”、“竖直”、“水平”、“内”、“外”等指示的方位或者位置关系为基于附图所示的方位或位置关系，仅是为了便于描述技术的简洁，而并不是指示或者暗示所指的装置或元件必须具有特定的方位、特定的方位构造和操作，因此不能理解对本发明的限制。此外，术语“第一”、“第二”、“第三”仅用于描述目的，而不能理解为指示或暗示相对重要性。In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the technology concisely, and do not indicate or imply that the device or element referred to must have a specific orientation, specific orientation structure and operation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
以下，横向x是指垂直于柔性显示面板的弯折轴线的方向，纵向z为沿弯折轴线的方向。Hereinafter, the transverse direction x refers to a direction perpendicular to the bending axis of the flexible display panel, and the longitudinal direction z refers to a direction along the bending axis.
下面结合附图及具体实施例对本文的技术方案和技术效果进行详细介绍，以便本领域内技术人员充分理解本发明。The technical scheme and technical effects of this article are described in detail below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can fully understand the present invention.
本发明的显示装置包括柔性显示面板和超声指纹识别模组。柔性显示面板可以为OLED(英文Organic Light-Emitting Diode)屏幕或者LED(英文全称Light-EmittingDiode)屏幕或者其他能够弯曲的屏幕。显示装置可以包括但不局限于手机、平板电脑、便捷式移动电话、门禁系统等电子设备。The display device of the present invention includes a flexible display panel and an ultrasonic fingerprint recognition module. The flexible display panel can be an OLED (Organic Light-Emitting Diode) screen or an LED (Light-Emitting Diode) screen or other bendable screens. The display device can include but is not limited to electronic devices such as mobile phones, tablet computers, portable mobile phones, and access control systems.
请参考图2，图2为本发明一种实施例中超声指纹识别模组安装于显示装置的局部示意图，本发明所提供的超声指纹识别模组包括柔性基板1、超声波结构层以及弹性体3。超声波结构层的作用与当前相同，至少能够产生和接收超声波。超声波结构层包括压电材料层以及两个电极层，压电材料层的两侧可以分别布置有上电极层和下电极层。对于柔性基板为TFT(英文全称为Thin Film Transistor)基板而言，上电极层可以直接结合于TFT基板的背侧，需要说明的是，本文以显示装置处于显示状态为例，靠近显示装置的显示侧为前侧，相应地远离显示装置的显示侧的一侧为背侧。Please refer to Figure 2, which is a partial schematic diagram of an ultrasonic fingerprint recognition module installed on a display device in an embodiment of the present invention. The ultrasonic fingerprint recognition module provided by the present invention includes a flexible substrate 1, an ultrasonic structure layer and an elastomer 3. The function of the ultrasonic structure layer is the same as the current one, at least it can generate and receive ultrasonic waves. The ultrasonic structure layer includes a piezoelectric material layer and two electrode layers, and an upper electrode layer and a lower electrode layer can be arranged on both sides of the piezoelectric material layer, respectively. For the flexible substrate being a TFT (Thin Film Transistor) substrate, the upper electrode layer can be directly combined with the back side of the TFT substrate. It should be noted that this article takes the display device in the display state as an example, the display side close to the display device is the front side, and the side away from the display side of the display device is the back side.
对于超声波结构层的工作原理请参考现有资料，本文不做赘述。For the working principle of the ultrasonic structural layer, please refer to existing information, which will not be elaborated in this article.
需要说明的是，请参考图1，图1为本发明一种实施例中像素阵列的分布示意图，上电极层通常包括多个间隔布置的上电极单元7，每一个上电极单元与像素电路电连接，以形成一个像素单元，上电极单元7排列成N行×M列，以形成一个像素阵列。每一个上电极单元7通常为矩形，当然也不排除可以为其他形状。像素电路的主要作用包括：第一、发射阶段，上电极保持一个点位，超声波结构层的下电极层(也称为发射电极)输入交流电平信号，这样可以激发压电材料层发出超声波；第二、接收阶段，超声波到达压电材料层时，上电极单元和下电极层之间的电平差就是一交流信号，由上电极单元(接收电极)读出。每个像素单元读出的电平信号是不一样的，像素电路本身具有行列位置关系，可以通过行开关9逐行对像素阵列中的行进行控制。读出电路的顺序与每个像素单元的位置密切相关，以便读出后识别出每个像素单元位置的电信号。各电信号的读取可以由电路8读取，即电路8的作用是按列将像素中的电信号读取出来。最后，在处理器中将电信号转换为图片信号就可以做图像判别。It should be noted that, please refer to FIG. 1, which is a schematic diagram of the distribution of a pixel array in an embodiment of the present invention. The upper electrode layer generally includes a plurality of upper electrode units 7 arranged at intervals, each of which is electrically connected to the pixel circuit to form a pixel unit, and the upper electrode units 7 are arranged in N rows × M columns to form a pixel array. Each upper electrode unit 7 is generally rectangular, but other shapes are not excluded. The main functions of the pixel circuit include: first, in the transmitting stage, the upper electrode maintains a point position, and the lower electrode layer of the ultrasonic structure layer (also called the transmitting electrode) inputs an AC level signal, which can excite the piezoelectric material layer to emit an ultrasonic wave; second, in the receiving stage, when the ultrasonic wave reaches the piezoelectric material layer, the level difference between the upper electrode unit and the lower electrode layer is an AC signal, which is read out by the upper electrode unit (receiving electrode). The level signal read out by each pixel unit is different, and the pixel circuit itself has a row and column position relationship, and the rows in the pixel array can be controlled row by row through the row switch 9. The order of the readout circuit is closely related to the position of each pixel unit, so that the electrical signal of each pixel unit position can be identified after reading. Each electrical signal can be read by the circuit 8, that is, the function of the circuit 8 is to read the electrical signal in the pixel by column. Finally, the electrical signal is converted into a picture signal in the processor so that image discrimination can be performed.
超声指纹识别模组的压电材料层对应一个像素阵列，也就是说，超声波结构层的压电材料层完全覆盖像素阵列。关于像素单元7的具体设置请参考相关技术，本文不做过多赘述。The piezoelectric material layer of the ultrasonic fingerprint recognition module corresponds to a pixel array, that is, the piezoelectric material layer of the ultrasonic structure layer completely covers the pixel array. For the specific configuration of the pixel unit 7, please refer to the relevant technology, and this article will not go into details.
超声波结构层位于柔性基板1和弹性体3之间。需要说明的是，本文中所述的“柔性”和“弹性”的含义为能够在预定弯折角度范围内弹性变形。弹性体3的材料可以为橡胶材料或者硅胶材料等。The ultrasonic structure layer is located between the flexible substrate 1 and the elastic body 3. It should be noted that the "flexibility" and "elasticity" mentioned herein mean that the elastic body 3 can be elastically deformed within a predetermined bending angle range. The material of the elastic body 3 can be rubber material or silicone material.
请参考图2图4，本发明中的超声指纹识别模组100，至少沿超声波结构层的厚度方向，厚度方向为图2中所示y方向，超声波结构层与弹性体3之间具有气腔3a。本发明中的气腔内部设置有至少一个支撑体101，支撑体101一端抵靠弹性体3另一端穿过超声波结构层抵靠柔性基板1。Please refer to Figures 2 and 4. The ultrasonic fingerprint recognition module 100 of the present invention has an air cavity 3a between the ultrasonic structure layer and the elastic body 3 at least along the thickness direction of the ultrasonic structure layer, which is the y direction shown in Figure 2. At least one support body 101 is arranged inside the air cavity of the present invention, and one end of the support body 101 abuts against the elastic body 3 and the other end passes through the ultrasonic structure layer and abuts against the flexible substrate 1.
也就是说，在气腔壁与柔性基板1之间支撑有支撑体101，当超声指纹识别模组100按压或者弯曲时，气腔壁能够通过支撑体101支撑于柔性基板1，这样气腔壁与超声波结构层之间在弯曲时也能够具有间隙，并且支撑体101穿过超声波结构层，能够不与超声波结构层接触，通过合理设置支撑体101的大小，保证整个超声波结构层所对应的像素阵列区发射和采集的超声波信号正常，以实现指纹图像的正常采集。进而实现了超声指纹识别模组100能够应用于显示装置的弯折区，大大提高了超声指纹识别模组100应用的灵活性和通用性。That is to say, a support body 101 is supported between the air cavity wall and the flexible substrate 1. When the ultrasonic fingerprint recognition module 100 is pressed or bent, the air cavity wall can be supported on the flexible substrate 1 through the support body 101. In this way, there can be a gap between the air cavity wall and the ultrasonic structure layer when bending, and the support body 101 passes through the ultrasonic structure layer without contacting the ultrasonic structure layer. By reasonably setting the size of the support body 101, it is ensured that the ultrasonic signal emitted and collected by the pixel array area corresponding to the entire ultrasonic structure layer is normal, so as to realize the normal collection of the fingerprint image. In this way, the ultrasonic fingerprint recognition module 100 can be applied to the bending area of the display device, which greatly improves the flexibility and versatility of the application of the ultrasonic fingerprint recognition module 100.
在一种示例中，请参考图2和图3、图4，超声波结构层包括至少两个子结构单元2，一种示例中子结构单元2可以包括上下布置的压电结构层和下电极层。至少部分相邻子结构单元2之间形成供支撑体101穿过的通道，也就是说，超声波结构层进一步分成N个子结构单元2，相邻子结构单元2可以完全分离，即各子结构单元2为相对独立的个体，彼此之间无机械连接关系，请结合图5至图8理解。当然，相邻子结构单元2之间也可以部分分离，部分具有机械连接关系，相邻子结构单元2通过连接段连接，相邻子结构单元、相邻连接段之间形成支撑体穿过的通道，请结合图9至图12理解。In one example, please refer to Figures 2, 3 and 4. The ultrasonic structure layer includes at least two substructure units 2. In one example, the substructure unit 2 may include a piezoelectric structure layer and a lower electrode layer arranged up and down. A channel for the support body 101 to pass through is formed between at least some of the adjacent substructure units 2. That is, the ultrasonic structure layer is further divided into N substructure units 2. The adjacent substructure units 2 can be completely separated, that is, each substructure unit 2 is a relatively independent individual, and there is no mechanical connection relationship between each other. Please refer to Figures 5 to 8 for understanding. Of course, the adjacent substructure units 2 can also be partially separated, and some have a mechanical connection relationship. The adjacent substructure units 2 are connected by connecting segments, and a channel for the support body to pass through is formed between the adjacent substructure units and the adjacent connecting segments. Please refer to Figures 9 to 12 for understanding.
如上所述，超声波结构层包括沿厚度方向y依次布置的上电极层、压电材料层和下电极层，上电极层的结构可以参考上文描述。支撑体穿过相邻子结构单元2之间通道及上电极单元7之间通道连接柔性基板1。子结构单元2包括沿指纹识别模组厚度方向上堆叠的压电材料层和下电极层。请参考下文理解，当超声波结构层划分为N个子结构单元2时，相应地，至少压电材料层和下电极层也划分为N个单元。请参考图3至图12理解，图5给出了压电材料层划分为六个压电材料层子单元21的实施方式，所有压电材料层子单元21可以同时提供驱动信号，当然也可以单独提供驱动信号。压电材料层子单元21的具体实施方式，六个压电材料层子单元21间隔布置，自左向右排成一行，相邻两者之间具有间距21a。同理，图6示出了与图5中压电材料层匹配的下电极层的结构，下电极层包括六个间隔布置的下电极层子单元22，相邻下电极层子单元22之间具有间距22a，形成同一个子结构单元2的下电极层子单元22的形状、大小基本与压电材料层子单元21的形状、大小相同。一种示例中，各压电材料层子单元21连接于同一输入区6。图7示出了图5所示压电材料层和图6所示下电极层组装后间隙填充第一胶粘层4的结构示意图，图8示出了弹性体3的俯视示意图，弹性体3的凸起部31与第一胶粘层4一一对应。As described above, the ultrasonic structure layer includes an upper electrode layer, a piezoelectric material layer and a lower electrode layer arranged in sequence along the thickness direction y, and the structure of the upper electrode layer can refer to the above description. The support body connects the flexible substrate 1 through the channels between adjacent substructure units 2 and the channels between the upper electrode units 7. The substructure unit 2 includes a piezoelectric material layer and a lower electrode layer stacked along the thickness direction of the fingerprint recognition module. Please refer to the following to understand that when the ultrasonic structure layer is divided into N substructure units 2, correspondingly, at least the piezoelectric material layer and the lower electrode layer are also divided into N units. Please refer to Figures 3 to 12 for understanding. Figure 5 shows an implementation method in which the piezoelectric material layer is divided into six piezoelectric material layer subunits 21. All piezoelectric material layer subunits 21 can provide driving signals at the same time, and of course, they can also provide driving signals separately. In the specific implementation method of the piezoelectric material layer subunit 21, the six piezoelectric material layer subunits 21 are arranged at intervals, arranged in a row from left to right, and there is a spacing 21a between adjacent ones. Similarly, FIG6 shows the structure of the lower electrode layer matching the piezoelectric material layer in FIG5 , and the lower electrode layer includes six lower electrode layer subunits 22 arranged at intervals, and there is a spacing 22a between adjacent lower electrode layer subunits 22, and the shape and size of the lower electrode layer subunits 22 forming the same substructure unit 2 are basically the same as the shape and size of the piezoelectric material layer subunits 21. In one example, each piezoelectric material layer subunit 21 is connected to the same input area 6. FIG7 shows a schematic diagram of the structure of the first adhesive layer 4 filling the gap after the piezoelectric material layer shown in FIG5 and the lower electrode layer shown in FIG6 are assembled, and FIG8 shows a schematic top view of the elastomer 3, and the raised portion 31 of the elastomer 3 corresponds one-to-one to the first adhesive layer 4.
请结合图9至图12，在另一种实施例中压电材料层中的相邻压电材料层子单元21通过第一连接段211连接，如图9所示，相邻压电材料层子单元21和相应连接段211围合形成第一通道21b。图10为下电极层的俯视图，下电极层中相邻下电极层子单元22之间连接有第二连接段221，相邻下电极层子单元22和第二连接段221围合形成第二通道22b。压电材料层和下电极层组装时，压电材料层子单元21与下电极层子单元22一一相对，第一通道21b与第二通道22b一一相对。支撑体能够自第一通道21b和第二通道22b穿过。上述实施例中将超声波结构层整体分成N个单元，这样更利于超声波结构层弯曲变形，使得超声波结构层与柔性基板弯曲匹配性较佳。Please refer to Figures 9 to 12. In another embodiment, adjacent piezoelectric material layer subunits 21 in the piezoelectric material layer are connected by a first connecting segment 211. As shown in Figure 9, adjacent piezoelectric material layer subunits 21 and corresponding connecting segments 211 enclose a first channel 21b. Figure 10 is a top view of the lower electrode layer. A second connecting segment 221 is connected between adjacent lower electrode layer subunits 22 in the lower electrode layer. Adjacent lower electrode layer subunits 22 and the second connecting segment 221 enclose a second channel 22b. When the piezoelectric material layer and the lower electrode layer are assembled, the piezoelectric material layer subunits 21 are opposite to the lower electrode layer subunits 22 one by one, and the first channel 21b is opposite to the second channel 22b one by one. The support body can pass through the first channel 21b and the second channel 22b. In the above embodiment, the ultrasonic structure layer is divided into N units as a whole, which is more conducive to the bending deformation of the ultrasonic structure layer, so that the bending matching of the ultrasonic structure layer and the flexible substrate is better.
该实施例中，相邻子结构单元2之间的间距可以小于100微米，例如50微米、80微米或者90微米等等数值。In this embodiment, the spacing between adjacent substructure units 2 may be less than 100 micrometers, such as 50 micrometers, 80 micrometers, or 90 micrometers.
该实施例中，支撑体可以自相邻子结构单元2之间的空间穿过，也就是说，相邻子结构单元2之间形成供支撑体穿过的通道。子结构单元2与弹性体3之间具有气腔3a，以保证各子结构单元2发出和接收超声波的可靠性。In this embodiment, the support body can pass through the space between adjacent substructure units 2, that is, a channel for the support body to pass through is formed between adjacent substructure units 2. An air cavity 3a is provided between the substructure unit 2 and the elastic body 3 to ensure the reliability of each substructure unit 2 in emitting and receiving ultrasonic waves.
对于支撑体的形成有多种形式，本申请以下给出了支撑体的具体成型结构。There are many forms for forming the support body, and the specific molding structure of the support body is given below in this application.
在一种实施方式中，至少部分相邻的子结构单元2之间具有第一胶粘层4，也就是说，部分或者全部相邻子结构单元之间具有第一胶粘层4。请结合图7理解，图7中给出了所有相邻子结构单元之间均设置有第一胶粘层4，第一胶粘层4在一定程度上能够避免超声指纹识别模组折弯时相邻两子结构单元接触，进而避免超声波信号发生异常，提高指纹图像采集可靠性。当然也可以部分子结构单元之间具有第一胶粘层4，如图11所示。In one embodiment, at least some of the adjacent substructure units 2 have a first adhesive layer 4 between them, that is, some or all of the adjacent substructure units have a first adhesive layer 4 between them. Please understand in conjunction with Figure 7, Figure 7 shows that all adjacent substructure units are provided with a first adhesive layer 4, and the first adhesive layer 4 can, to a certain extent, prevent the two adjacent substructure units from contacting each other when the ultrasonic fingerprint recognition module is bent, thereby preventing abnormal ultrasonic signals and improving the reliability of fingerprint image acquisition. Of course, some of the substructure units may also have a first adhesive layer 4 between them, as shown in Figure 11.
该实施例的弹性体3朝向柔性基板的表面具有凸起部31，相邻凸起部和与其相对的第一胶粘层4固定结合以形成支撑体。凸起部31可以与第一胶粘层4的数量相同，二者一一相对设置，如图7至图8所示。当然凸起部31和第一胶粘层4的数量也可以不同，如图14和图15所示。The surface of the elastic body 3 facing the flexible substrate in this embodiment has protrusions 31, and adjacent protrusions are fixedly combined with the first adhesive layer 4 opposite thereto to form a support body. The number of protrusions 31 can be the same as that of the first adhesive layer 4, and the two are arranged one by one, as shown in Figures 7 and 8. Of course, the number of protrusions 31 and the number of first adhesive layers 4 can also be different, as shown in Figures 14 and 15.
支撑体通常也具有弹性，在超声指纹识别模组弯曲变形时，支撑体受力也会产生一定的变形，为了尽量减少支撑体变形对子结构单元2与弹性体3之间气腔的影响，应当控制支撑体的横截面尺寸。请参考图13和图14理解，在一种示例中，凸起部31在垂直于超声波结构层厚度方向y的平面内的投影定义为第一投影31a，第一胶粘层4垂直于超声波结构层厚度方向y的平面内的投影为第二投影4a，第二投4a影覆盖第一投影31a。对于凸起部31和第一胶粘层4均为长方形的实施例，可以理解，凸起部31的宽度小于第一胶粘层4的宽度，凸起部31的横向宽度W1小于第一胶粘层4的横向宽度W2。The support body is usually also elastic. When the ultrasonic fingerprint recognition module is bent and deformed, the support body will also be deformed to a certain extent under force. In order to minimize the influence of the deformation of the support body on the air cavity between the substructure unit 2 and the elastic body 3, the cross-sectional size of the support body should be controlled. Please refer to Figures 13 and 14 to understand that in one example, the projection of the raised portion 31 in the plane perpendicular to the thickness direction y of the ultrasonic structural layer is defined as the first projection 31a, and the projection of the first adhesive layer 4 in the plane perpendicular to the thickness direction y of the ultrasonic structural layer is the second projection 4a, and the second projection 4a covers the first projection 31a. For the embodiment in which the raised portion 31 and the first adhesive layer 4 are both rectangular, it can be understood that the width of the raised portion 31 is smaller than the width of the first adhesive layer 4, and the lateral width W1 of the raised portion 31 is smaller than the lateral width W2 of the first adhesive layer 4.
这样，支撑体即使在弯曲时变形，也不会占据子结构单元2和弹性体3之间的气腔空间，不影响超声波的正常工作。In this way, even if the support body is deformed when being bent, it will not occupy the air cavity space between the substructure unit 2 and the elastic body 3, and will not affect the normal operation of the ultrasonic wave.
请参考图4，在另一种实施方式中，弹性体3朝向柔性基板1的表面具有凸起部31，凸起部31部分位于相邻的子结构单元2之间，且与柔性基板1固定结合，也就是说，凸起部31在形成支撑体对气腔形成支撑的同时，位于子结构单元2之间的部分还能够起到隔离相邻子结构单元2的作用，该凸起部31位于相邻子结构单元之间的部分能够起到上述实施例中第一胶粘层4的作用。Please refer to Figure 4. In another embodiment, the surface of the elastomer 3 facing the flexible substrate 1 has a protrusion 31, and the protrusion 31 is partially located between adjacent sub-structure units 2 and fixedly combined with the flexible substrate 1. That is, while the protrusion 31 forms a support body to support the air cavity, the part located between the sub-structure units 2 can also play a role in isolating adjacent sub-structure units 2. The part of the protrusion 31 located between adjacent sub-structure units can play the role of the first adhesive layer 4 in the above embodiment.
凸起部31与相邻子结构单元2之间可以有间隙，当然也可以无间隙。There may be a gap between the protrusion 31 and the adjacent substructure unit 2 , or there may be no gap.
该实施例中，成型于弹性体3上的凸起部31兼顾支撑气腔与隔离相邻子结构单元2的作用，无需另外在相邻子结构单元2之间浇筑或填充胶，简化模组成型工艺流程。In this embodiment, the protrusion 31 formed on the elastic body 3 takes into account the functions of supporting the air cavity and isolating adjacent sub-structure units 2. There is no need to cast or fill glue between adjacent sub-structure units 2, which simplifies the module molding process.
请参考图15，下电极层子单元22朝向弹性体3的侧面还覆盖有第二胶粘层5，气腔形成于第二胶粘层5和弹性体3之间。这样子结构单元2被封装于第二胶粘层5的内部，第二胶粘层5能够起到保护子结构单元2的作用。Please refer to FIG15 , the side of the lower electrode layer subunit 22 facing the elastomer 3 is also covered with a second adhesive layer 5, and an air cavity is formed between the second adhesive layer 5 and the elastomer 3. In this way, the substructure unit 2 is encapsulated inside the second adhesive layer 5, and the second adhesive layer 5 can protect the substructure unit 2.
从图5至图8所示实施例可以看出，凸起部31和第一胶粘层4形成隔离相邻子结构单元2的支撑体，这样子结构单元2完全位于相邻支撑体、弹性体3与柔性基板1形成的空腔内部，各空腔可以相对独立。每一个空腔内部具有至少一个子结构单元2。图中虽然示出了一个空腔安装一个子结构单元2的实施方式，但是本领域内技术人员应当理解，为了能更好适应显示装置弯折区的变形，在图5至图8所示实施例的基础上，沿纵向每一个子结构单元2也可以进一步分为N块，N块可以位于两个凸起部31之间的空腔。It can be seen from the embodiments shown in Figures 5 to 8 that the protrusions 31 and the first adhesive layer 4 form a support body that isolates adjacent sub-structure units 2, so that the sub-structure units 2 are completely located inside the cavity formed by the adjacent support body, the elastomer 3 and the flexible substrate 1, and each cavity can be relatively independent. There is at least one sub-structure unit 2 inside each cavity. Although the figure shows an embodiment in which one sub-structure unit 2 is installed in one cavity, those skilled in the art should understand that in order to better adapt to the deformation of the bending zone of the display device, on the basis of the embodiments shown in Figures 5 to 8, each sub-structure unit 2 can also be further divided into N blocks along the longitudinal direction, and the N blocks can be located in the cavity between two protrusions 31.
结合图20和14理解，图20为一种实施例中弹性体3的俯视图，该实施例中弹性体3仅沿横向间隔设置有凸起部，图中仅示出了形成于弹性体3上的部分气腔，分别为：第一气腔3a1、第二气腔3a2、第三气腔3a3和第四气腔3a4，各气腔可以与一个子结构单元2相对应，当然各气腔内部也可以间隔布置有多个子结构单元2，例如子结构单元2在一个气腔内部可以阵列布置，相应地，弹性体3沿纵向也可以进一步设置凸起部，请参考图21，为了更好的理解技术方案，本文将弹性体3的凸起部定义为第一凸起部311和第二凸起部312，第一凸起部311沿纵向延伸，第二凸起部312沿横向延伸，其中横向x和纵向z相互垂直，第一凸起部311和第二凸起部312将弹性体3划分为N个气腔，一个气腔可以对应一个或者两个以上的子结构单元2。本领域内技术人员可以理解，图21所示弹性体3就是将图20所示各气腔进一步通过第二凸起部312进行隔离分割，例如第一气腔隔离为多个第一子气腔3a11，第二气腔隔离为多个第二子气腔3a21。当然，沿纵向的子结构单元2之间可以具有隔离胶层，也可以不设置隔离胶层。In combination with Figures 20 and 14, Figure 20 is a top view of the elastomer 3 in an embodiment, in which the elastomer 3 is only provided with raised portions at intervals along the lateral direction, and only some air cavities formed on the elastomer 3 are shown in the figure, namely: the first air cavity 3a1, the second air cavity 3a2, the third air cavity 3a3 and the fourth air cavity 3a4, each air cavity can correspond to a sub-structure unit 2, and of course, multiple sub-structure units 2 can be arranged at intervals inside each air cavity, for example, the sub-structure units 2 can be arranged in an array inside an air cavity, and accordingly, the elastomer 3 can also be further provided with raised portions along the longitudinal direction, please refer to Figure 21, in order to better understand the technical solution, the raised portions of the elastomer 3 are defined herein as the first raised portion 311 and the second raised portion 312, the first raised portion 311 extends along the longitudinal direction, and the second raised portion 312 extends along the lateral direction, wherein the lateral direction x and the longitudinal direction z are perpendicular to each other, the first raised portion 311 and the second raised portion 312 divide the elastomer 3 into N air cavities, and one air cavity can correspond to one or more sub-structure units 2. Those skilled in the art can understand that the elastic body 3 shown in FIG21 is to further isolate and divide the air cavities shown in FIG20 through the second protrusion 312, for example, the first air cavity is isolated into a plurality of first sub-cavities 3a11, and the second air cavity is isolated into a plurality of second sub-cavities 3a21. Of course, there may be an isolation rubber layer between the sub-structure units 2 in the longitudinal direction, or there may be no isolation rubber layer.
通过合理设置凸起部的数量、位置、形状，可以实现子结构单元2满足不同需要的阵列分布形式，即沿柔性显示面板的弯折轴线方向间隔布置有N行子结构单元2，沿垂直于弯折轴线方向间隔布置有M列子结构单元2。By reasonably setting the number, position and shape of the protrusions, the array distribution form of the sub-structure units 2 can be achieved to meet different needs, that is, N rows of sub-structure units 2 are arranged at intervals along the bending axis of the flexible display panel, and M columns of sub-structure units 2 are arranged at intervals along the direction perpendicular to the bending axis.
对于显示装置而言，越靠近其弯折轴线弯曲曲率越大。相应地，当超声指纹识别模组100安装于显示装置的弯折区域时，超声指纹识别模组100中靠近弯折轴线位置的气腔弯曲时变形最大，需要的支撑能力越大，即距离弯折轴线位置越远气腔弯曲时变形相对比较小，因此本文还对超声指纹识别模组进行了以下设置。For a display device, the closer to its bending axis, the greater the curvature. Accordingly, when the ultrasonic fingerprint recognition module 100 is installed in the bending area of the display device, the air cavity near the bending axis in the ultrasonic fingerprint recognition module 100 deforms the most when bending, and the greater the support capacity required, that is, the farther from the bending axis, the smaller the deformation of the air cavity when bending. Therefore, this article also makes the following settings for the ultrasonic fingerprint recognition module.
需要说明的是，图19中所示的弯折平面是指过弯折轴线的竖直面。It should be noted that the bending plane shown in FIG. 19 refers to a vertical plane passing through the bending axis.
在一种具体示例中，相邻支撑体、弹性体与柔性基板围成多个空腔，各空腔相对独立，支撑体的形式可以参照上文描述。请参考图19至图22，相邻凸台部形成的第一空腔3a1、第二气腔3a2、第三气腔3a3和第四气腔3a4，四者离柔性显示面板的弯折轴线越来越远，第一空腔3a1横向宽度L1、第二气腔3a2横向宽度L2、第三气腔3a3横向宽度L3和第四气腔3a4横向宽度L4越来越大，即L1<L2<L3<L4。In a specific example, adjacent support bodies, elastic bodies and flexible substrates enclose multiple cavities, each cavity is relatively independent, and the form of the support body can refer to the above description. Please refer to Figures 19 to 22, the first cavity 3a1, the second cavity 3a2, the third cavity 3a3 and the fourth cavity 3a4 formed by adjacent bosses are getting farther and farther away from the bending axis of the flexible display panel, and the lateral width L1 of the first cavity 3a1, the lateral width L2 of the second cavity 3a2, the lateral width L3 of the third cavity 3a3 and the lateral width L4 of the fourth cavity 3a4 are getting larger and larger, that is, L1<L2<L3<L4.
靠近弯折轴线位置的空腔横向宽度相对较小，即在弯曲变形较大的位置设置的支撑体比较密集，避免空腔壁与子结构层单元接触，远离弯折轴线位置的空腔横向宽度相对较大，即在弯曲变形相对较小的位置设置的支撑体比较稀疏，在满足使用需求的前提下，有利于降低产品整体重量。The lateral width of the cavity near the bending axis is relatively small, that is, the support bodies arranged at the position with larger bending deformation are relatively dense, avoiding contact between the cavity wall and the substructure layer units. The lateral width of the cavity far from the bending axis is relatively large, that is, the support bodies arranged at the position with relatively smaller bending deformation are relatively sparse, which is beneficial to reduce the overall weight of the product while meeting the use requirements.
在上述原理的基础上，还可以对气腔进行如下改进。Based on the above principles, the air cavity can also be improved as follows.
请参考图22，在一种示例中，距离柔性显示面板200的弯折轴线越远，超声波结构层与弹性体3之间的气腔高度越小，例如第一空腔3a1所对应的气腔高度H1、第二空腔3a2所对应的气腔高度H2、第三空腔3a3所对应的气腔高度H3、第四空腔3a4所对应的气腔高度H4依次减小，即H4<H3<H2<H1。Please refer to Figure 22. In one example, the farther away from the bending axis of the flexible display panel 200, the smaller the air cavity height between the ultrasonic structure layer and the elastomer 3. For example, the air cavity height H1 corresponding to the first cavity 3a1, the air cavity height H2 corresponding to the second cavity 3a2, the air cavity height H3 corresponding to the third cavity 3a3, and the air cavity height H4 corresponding to the fourth cavity 3a4 decrease successively, that is, H4<H3<H2<H1.
本文所述的超声指纹识别模组100可以仅位于柔性显示面板200的弯折区，当然也可以部分位于柔性显示面板200的弯折区，部分位于柔性显示面板200的非弯曲区，如图18所示。超声指纹识别模组100位于柔性显示面板200和显示装置的衬板300之间，柔性显示面板200和显示装置的衬板300之间其他区域具有填充层400，超声指纹识别模组100与填充层400之间可以具有间隙S，如图2和9所示。这样能够避免填充层对超声指纹识别模组100产生挤压。The ultrasonic fingerprint recognition module 100 described herein can be located only in the bending area of the flexible display panel 200, and of course can also be located partially in the bending area of the flexible display panel 200 and partially in the non-bending area of the flexible display panel 200, as shown in FIG18. The ultrasonic fingerprint recognition module 100 is located between the flexible display panel 200 and the backing plate 300 of the display device, and other areas between the flexible display panel 200 and the backing plate 300 of the display device have a filling layer 400, and there can be a gap S between the ultrasonic fingerprint recognition module 100 and the filling layer 400, as shown in FIGS. 2 and 9. This can prevent the filling layer from squeezing the ultrasonic fingerprint recognition module 100.
请参考图16、图17和图18，在另一种具体实施例中，弹性体3包括第一主体301和第二主体302，第一主体301与超声波结构层相对用于形成气腔，第二主体302自第一主体301向外延伸，用于与填充层400结合固定。这样有利于超声指纹识别模组100可靠结合于显示装置中。Please refer to Figures 16, 17 and 18. In another specific embodiment, the elastic body 3 includes a first body 301 and a second body 302. The first body 301 is opposite to the ultrasonic structure layer to form an air cavity, and the second body 302 extends outward from the first body 301 to be combined and fixed with the filling layer 400. This is conducive to the reliable combination of the ultrasonic fingerprint recognition module 100 in the display device.
上述实施例中，第二主体302可以设置有至少一个支撑凸台32，用于与填充层400结合固定，各支撑凸台32间隔布置。在实现超声指纹识别模组100与填充层400结合可靠的前提下，支撑凸台32的设置可以尽量降低产品整体重量。In the above embodiment, the second body 302 may be provided with at least one supporting boss 32 for being fixedly coupled with the filling layer 400, and the supporting bosses 32 are arranged at intervals. On the premise of achieving reliable coupling between the ultrasonic fingerprint recognition module 100 and the filling layer 400, the provision of the supporting bosses 32 can minimize the overall weight of the product.
支撑凸台32的高度和宽度可以与凸起部31大致相同，当然二者结构也可以不同。The height and width of the supporting boss 32 may be substantially the same as those of the raised portion 31 , and of course the structures of the two may also be different.
上述各显示装置还可以包括第三胶层600，填充层400和柔性基板1均通过第三胶层600与柔性显示面板200结合固定。该实施例中填充层400和柔性基板1通过同一胶层固定结合于柔性显示面板200，减少了超声指纹识别模组侧的制程数目。Each of the above display devices may further include a third adhesive layer 600, and the filling layer 400 and the flexible substrate 1 are both fixed to the flexible display panel 200 through the third adhesive layer 600. In this embodiment, the filling layer 400 and the flexible substrate 1 are fixed to the flexible display panel 200 through the same adhesive layer, which reduces the number of processes on the ultrasonic fingerprint recognition module side.
同理，弹性件3可以与填充层400通过同一胶层500与衬板300固定，如图2所示。当然，弹性件3和填充层400二者也可以通过不同胶层与衬板300固定。Similarly, the elastic member 3 and the filling layer 400 can be fixed to the lining plate 300 through the same adhesive layer 500, as shown in Figure 2. Of course, the elastic member 3 and the filling layer 400 can also be fixed to the lining plate 300 through different adhesive layers.
显示装置包括上述任一实施例的超声指纹识别模组100，故显示装置也具有超声指纹识别模组100的上述技术效果。The display device includes the ultrasonic fingerprint recognition module 100 of any of the above embodiments, so the display device also has the above technical effects of the ultrasonic fingerprint recognition module 100.
以上对本发明所提供的一种超声指纹识别模组及显示装置进行了详细介绍。本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明的方法及其核心思想。应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以对本发明进行若干改进和修饰，这些改进和修饰也落入本发明权利要求的保护范围内。The above is a detailed introduction to an ultrasonic fingerprint recognition module and display device provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111069377.9ACN113780184B (en) | 2021-09-13 | 2021-09-13 | Ultrasonic fingerprint recognition module and display device |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111069377.9ACN113780184B (en) | 2021-09-13 | 2021-09-13 | Ultrasonic fingerprint recognition module and display device |
| Publication Number | Publication Date |
|---|---|
| CN113780184A CN113780184A (en) | 2021-12-10 |
| CN113780184Btrue CN113780184B (en) | 2024-11-08 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111069377.9AActiveCN113780184B (en) | 2021-09-13 | 2021-09-13 | Ultrasonic fingerprint recognition module and display device |
| Country | Link |
|---|---|
| CN (1) | CN113780184B (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114612947A (en)* | 2022-03-04 | 2022-06-10 | 维沃移动通信有限公司 | Fingerprint recognition components and electronics |
| CN115834763B (en)* | 2022-11-16 | 2024-08-20 | 维沃移动通信有限公司 | Screen control method and device, ultrasonic fingerprint detection module and electronic equipment |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110275577A (en)* | 2019-06-25 | 2019-09-24 | 京东方科技集团股份有限公司 | Ultrasound module and display |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103793691A (en)* | 2014-01-28 | 2014-05-14 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device and mobile terminal with same |
| CN106250834B (en)* | 2016-07-25 | 2019-05-10 | 京东方科技集团股份有限公司 | Fingerprint identification display panel, method for making the same, method for driving the same, and display device |
| US20180373913A1 (en)* | 2017-06-26 | 2018-12-27 | Qualcomm Incorporated | Ultrasonic fingerprint sensor for under-display applications |
| CN112541401B (en)* | 2020-11-20 | 2025-01-24 | 京东方科技集团股份有限公司 | Ultrasonic fingerprint recognition device and its manufacturing method, and display device |
| CN112733790B (en)* | 2021-01-21 | 2022-11-08 | 厦门天马微电子有限公司 | Fingerprint identification module, display panel, driving method of display panel and display device |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110275577A (en)* | 2019-06-25 | 2019-09-24 | 京东方科技集团股份有限公司 | Ultrasound module and display |
| Publication number | Publication date |
|---|---|
| CN113780184A (en) | 2021-12-10 |
| Publication | Publication Date | Title |
|---|---|---|
| CN111914776B (en) | display device | |
| US20250031354A1 (en) | Flexible display module and electronic device comprising the same | |
| CN208027381U (en) | Under-screen biometric identification device, biometric identification components and terminal equipment | |
| CN113780184B (en) | Ultrasonic fingerprint recognition module and display device | |
| CN111443762B (en) | Display device | |
| KR102795248B1 (en) | Display device including ultrasonic detection device | |
| KR20190044329A (en) | Piezoelectric panel speaker and electronic apparatus comprising the same | |
| CN1550968A (en) | Acoustic touch detection device | |
| KR102734922B1 (en) | Display apparatus | |
| CN105264543A (en) | Ultrasonic sensor with bonded piezoelectric layer | |
| KR102696990B1 (en) | Electronic apparatus | |
| US20210227688A1 (en) | Flexible circuit board component and display device | |
| JP7506216B2 (en) | Display device and vehicle including the display device | |
| KR102668405B1 (en) | Display device and method for driving the display device | |
| US11599145B2 (en) | Electronic devices with curved displays | |
| KR102617226B1 (en) | Electronic apparatus and method for driving thereof | |
| TW201801197A (en) | Ultrasonic fingerprint recognition module and manufacturing method thereof | |
| CN110569825B (en) | Display components and under-screen fingerprint recognition electronic equipment | |
| CN110059655A (en) | Electronic equipment | |
| CN110703955A (en) | Display panel and display device | |
| CN106775118B (en) | Pressure sensing device and equipment | |
| KR102564899B1 (en) | Fingerprint sensing module, fingerprint sensing apparatus including the module, and display apparatus including the apparatus | |
| CN113822101A (en) | Fingerprint identification structure and driving method thereof, and electronic device | |
| CN217690135U (en) | Ultrasonic fingerprint identification device and electronic equipment | |
| CN210324234U (en) | Ultrasonic fingerprint module and electronic equipment |
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |