技术领域technical field
本发明涉及显示技术领域，尤其涉及一种显示面板及显示装置。The present invention relates to the field of display technology, in particular to a display panel and a display device.
背景技术Background technique
目前，许多显示器件中具有指纹识别功能，通常，指纹识别的方式包括电容式指纹识别方式。一般，在硅基上设置电容式指纹识别结构，但是由于电容式指纹识别结构距离手指较远，例如，超过300μm，接收到的电容信号量较小，导致指纹识别效果较差。At present, many display devices have a fingerprint recognition function, and generally, fingerprint recognition methods include a capacitive fingerprint recognition method. Generally, a capacitive fingerprint identification structure is set on a silicon base, but since the capacitive fingerprint identification structure is far away from the finger, for example, more than 300 μm, the amount of received capacitive signal is small, resulting in poor fingerprint identification effect.
发明内容Contents of the invention
本发明实施例的目的是提供一种显示面板及显示装置，用于解决指纹识别效果较差的问题。The purpose of the embodiments of the present invention is to provide a display panel and a display device for solving the problem of poor fingerprint recognition effect.
本发明实施例的目的是通过以下技术方案实现的：The purpose of the embodiments of the present invention is achieved through the following technical solutions:
一种显示面板，该显示面板包括设置有多个像素电路的驱动背板，电容式指纹识别结构；所述驱动背板为柔性背板；A display panel, comprising a driving backplane provided with a plurality of pixel circuits, and a capacitive fingerprint identification structure; the driving backplane is a flexible backplane;
所述显示面板还包括覆盖所述柔性背板正面的柔性盖板；所述电容式指纹识别结构位于所述柔性背板和所述柔性盖板之间的边框区域；The display panel also includes a flexible cover covering the front of the flexible backplane; the capacitive fingerprint recognition structure is located in a frame area between the flexible backplane and the flexible cover;
或者，or,
所述电容式指纹识别结构位于所述柔性背板的背面。The capacitive fingerprint identification structure is located on the back of the flexible backplane.
较佳地，所述电容式指纹识别结构包括多条沿第一方向延伸的驱动电极和沿第二方向延伸的感应电极，位于所述驱动电极和所述感应电极之间的介质层。Preferably, the capacitive fingerprint recognition structure includes a plurality of driving electrodes extending along a first direction and sensing electrodes extending along a second direction, and a dielectric layer is located between the driving electrodes and the sensing electrodes.
较佳地，所述显示面板还包括位于所述柔性背板正面边框区域的覆晶薄膜连接部和多条连接引线；Preferably, the display panel further includes a chip-on-chip connecting portion and a plurality of connecting leads located in the front frame area of the flexible backplane;
所述驱动电极和感应电极通过各所述连接引线与所述覆晶薄膜连接部连接。The driving electrode and the sensing electrode are connected to the chip-on-film connecting portion through each of the connection leads.
较佳地，所述像素电路中包括开关晶体管；所述开关晶体管包括栅极、源极和漏极；Preferably, the pixel circuit includes a switch transistor; the switch transistor includes a gate, a source and a drain;
所述电容式指纹识别结构位于所述柔性背板的正面时，所述驱动电极与所述栅极同层同材质，所述感应电极与所述源极和漏极同层同材质；或者，所述驱动电极与所述源极和漏极同层同材质，所述感应电极与所述栅极同层同材质。When the capacitive fingerprint identification structure is located on the front of the flexible backplane, the driving electrode is of the same layer and material as the grid, and the sensing electrode is of the same layer as the source electrode and the drain electrode; or, The driving electrode is of the same layer and material as the source electrode and the drain electrode, and the sensing electrode is of the same layer and material as the gate electrode.
较佳地，所述电容式指纹识别结构位于所述柔性背板的背面时，所述电容式指纹识别结构位于与所述覆晶薄膜连接部所对应的边框区域。Preferably, when the capacitive fingerprint recognition structure is located on the back of the flexible backplane, the capacitive fingerprint recognition structure is located in the frame area corresponding to the connecting portion of the chip-on-chip.
较佳地，所述电容式指纹识别结构位于所述柔性背板的背面时，所述显示面板还包括覆盖所述电容式指纹识别结构的保护薄膜。Preferably, when the capacitive fingerprint identification structure is located on the back of the flexible backplane, the display panel further includes a protective film covering the capacitive fingerprint identification structure.
较佳地，所述电容式指纹识别结构在所述柔性背板上的正投影的面积小于2mm*2mm。Preferably, the area of the orthographic projection of the capacitive fingerprint recognition structure on the flexible backplane is less than 2mm*2mm.
较佳地，所述电容式指纹识别结构的像素大小的范围是50μm*50um～80μm*80μm。Preferably, the pixel size of the capacitive fingerprint identification structure ranges from 50 μm*50 μm to 80 μm*80 μm.
较佳地，所述显示面板为OLED显示面板。Preferably, the display panel is an OLED display panel.
一种显示装置，包括如以上任一项所述的显示面板。A display device, comprising the display panel as described in any one of the above.
本发明实施例的有益效果如下：The beneficial effects of the embodiments of the present invention are as follows:
本发明实施例提供的一种显示面板及显示装置中，由于将电容式指纹识别结构设置在柔性背板上，即设置在柔性显示面板中，该电容式指纹识别结构在柔性背板的正面时，覆盖的柔性盖板就是超薄的盖板，因而，可以与手指的距离非常近，该电容式指纹识别结构在柔性背板的背面时，无盖板覆盖，与手指的距离更加近，这样，可以增加电容式指纹识别结构接收到的电容信号量，从而提高了指纹识别效果。In the display panel and display device provided by the embodiments of the present invention, since the capacitive fingerprint recognition structure is arranged on the flexible backplane, that is, in the flexible display panel, when the capacitive fingerprint recognition structure is on the front of the flexible backplane , the covered flexible cover is an ultra-thin cover, so the distance between the finger and the finger can be very close. , can increase the capacitive signal amount received by the capacitive fingerprint identification structure, thereby improving the fingerprint identification effect.
附图说明Description of drawings
图1a为本发明实施例提供的一种显示面板的结构示意图之一；Fig. 1a is one of the structural schematic diagrams of a display panel provided by an embodiment of the present invention;
图1b为本发明实施例提供的一种显示面板的结构示意图之二；Fig. 1b is the second structural schematic diagram of a display panel provided by an embodiment of the present invention;
图2为本发明实施例提供的一种指纹识别结构的示意图；FIG. 2 is a schematic diagram of a fingerprint identification structure provided by an embodiment of the present invention;
图3为本发明实施例提供的一种显示面板的结构示意图之三；FIG. 3 is the third structural schematic diagram of a display panel provided by an embodiment of the present invention;
图4为本发明实施例提供的一种显示面板的结构示意图之四；FIG. 4 is a fourth structural schematic diagram of a display panel provided by an embodiment of the present invention;
图5为本发明实施例提供的一种显示面板的结构示意图之五；FIG. 5 is a fifth structural schematic diagram of a display panel provided by an embodiment of the present invention;
图6为本发明实施例提供的一种指纹识别结构的俯视示意图；FIG. 6 is a schematic top view of a fingerprint identification structure provided by an embodiment of the present invention;
图7为本发明实施例提供的一种显示面板的结构示意图之六。FIG. 7 is a sixth structural schematic diagram of a display panel provided by an embodiment of the present invention.
具体实施方式detailed description
下面结合附图和实施例对本发明提供的一种显示面板及显示装置进行更详细地说明。A display panel and a display device provided by the present invention will be described in more detail below with reference to the drawings and embodiments.
如图1a和图1b所示，本发明实施例提供一种显示面板，该显示面板包括设置有多个像素电路001的驱动背板，电容式指纹识别结构002；驱动背板为柔性背板003；As shown in Figure 1a and Figure 1b, an embodiment of the present invention provides a display panel, the display panel includes a driving backplane provided with a plurality of pixel circuits 001, a capacitive fingerprint recognition structure 002; the driving backplane is a flexible backplane 003 ;
如图1a所示，显示面板还包括覆盖柔性背板正面的柔性盖板004；电容式指纹识别结构位于柔性背板和柔性盖板之间的边框区域005；As shown in Figure 1a, the display panel also includes a flexible cover 004 covering the front of the flexible backplane; the capacitive fingerprint identification structure is located in the frame area 005 between the flexible backplane and the flexible cover;
或者，or,
如图1b所示，电容式指纹识别结构位于柔性背板的背面。As shown in Figure 1b, the capacitive fingerprint recognition structure is located on the backside of the flexible backplane.
本发明实施例中，由于将电容式指纹识别结构设置在柔性背板上，即设置在柔性显示面板中，该电容式指纹识别结构在柔性背板的正面时，覆盖的柔性盖板就是超薄的盖板，因而，可以与手指的距离非常近，该电容式指纹识别结构在柔性背板的背面时，无盖板覆盖，与手指的距离更加近，这样，可以增加电容式指纹识别结构接收到的电容信号量，从而提高了指纹识别效果。In the embodiment of the present invention, since the capacitive fingerprint recognition structure is arranged on the flexible backplane, that is, in the flexible display panel, when the capacitive fingerprint recognition structure is on the front of the flexible backplane, the covered flexible cover is ultra-thin Therefore, the distance between the capacitive fingerprint identification structure and the finger can be very close. When the capacitive fingerprint recognition structure is on the back of the flexible backplane, there is no cover plate to cover it, and the distance to the finger is closer. In this way, the capacitive fingerprint recognition structure can increase the reception The amount of capacitive signal received, thereby improving the fingerprint recognition effect.
另外，电容式指纹识别结构设置在背面时，也有利于节省边框区域的空间，利于窄边框化的实现。In addition, when the capacitive fingerprint identification structure is arranged on the back, it is also beneficial to save space in the frame area and facilitate the realization of narrow frame.
一般柔性盖板的厚度在50μm～150μm左右，因而可以大大减小电容式指纹识别结构与手指的距离。Generally, the thickness of the flexible cover is about 50 μm to 150 μm, so the distance between the capacitive fingerprint identification structure and the finger can be greatly reduced.
具体实施时，较佳地，如图2所示，电容式指纹识别结构包括多条沿第一方向延伸的驱动电极021和沿第二方向延伸的感应电极022，位于驱动电极和感应电极之间的介质层023。During specific implementation, preferably, as shown in Figure 2, the capacitive fingerprint recognition structure includes a plurality of driving electrodes 021 extending along the first direction and sensing electrodes 022 extending along the second direction, located between the driving electrodes and the sensing electrodes The dielectric layer 023.
电容式指纹识别结构需要与电路板连接，一般，是通过覆晶薄膜(Chip On Film，COF)与电路板连接，因而，较佳地，如图3所示，显示面板还包括位于柔性背板正面边框区域的覆晶薄膜连接部006和多条连接引线(图中为示出)；驱动电极和感应电极通过各连接引线与覆晶薄膜连接部006连接。The capacitive fingerprint recognition structure needs to be connected to the circuit board, generally, it is connected to the circuit board through a Chip On Film (COF), therefore, preferably, as shown in Figure 3, the display panel also includes a flexible backplane The chip-on-film connection part 006 in the front frame area and a plurality of connecting leads (not shown in the figure); the driving electrodes and the sensing electrodes are connected to the chip-on-film connection part 006 through the connecting leads.
具体实施例时，较佳地，像素电路中包括开关晶体管；开关晶体管包括栅极、源极和漏极；电容式指纹识别结构位于柔性背板的正面时，驱动电极与栅极同层同材质，感应电极与源极和漏极同层同材质；或者，驱动电极与源极和漏极同层同材质，感应电极与栅极同层同材质。基于本实施例的结构，在显示面板的制作过程中，利用柔性背板上开关晶体管的制作过程中的栅极、源极、漏极的制作工艺，同时制作驱动电极和感应电极，可以达到简化工艺的目的。为了进一步简化工艺，较佳地，栅极与源极和漏极之间设置有第一绝缘层，指纹识别结构中的介质层也与该第一绝缘层同层同材质。In a specific embodiment, preferably, the pixel circuit includes a switching transistor; the switching transistor includes a gate, a source and a drain; when the capacitive fingerprint identification structure is located on the front of the flexible backplane, the driving electrode and the gate are of the same layer and the same material , the sensing electrode is of the same layer and material as the source electrode and the drain electrode; or, the driving electrode is of the same layer and material as the source electrode and the drain electrode, and the sensing electrode and the gate electrode are of the same layer and material. Based on the structure of this embodiment, in the manufacturing process of the display panel, the manufacturing process of the gate, source, and drain in the manufacturing process of the switching transistor on the flexible backplane is used to manufacture the driving electrode and the sensing electrode at the same time, which can achieve simplification. purpose of the craft. In order to further simplify the process, preferably, a first insulating layer is disposed between the gate, the source and the drain, and the dielectric layer in the fingerprint recognition structure is also the same layer and material as the first insulating layer.
具体实施时，由于电容式指纹识别结构要与覆晶薄膜连接部连接，而该覆晶薄膜连接部是在柔性背板的正面边框区域，为了更加方便连接且节省材料，较佳地，如图4所示，电容式指纹识别结构004位于柔性背板003的背面时，电容式指纹识别结构004位于与覆晶薄膜连接部006所对应的边框区域。这样，只需要很短的连接引线，从柔性背板的正面的边缘绕到背面的边缘，既简单方便又节省材料。During specific implementation, since the capacitive fingerprint recognition structure needs to be connected to the connection part of the chip-on-chip film, and the connection part of the chip-on-film film is in the front frame area of the flexible backplane, in order to facilitate the connection and save materials, preferably, as shown in the figure As shown in 4, when the capacitive fingerprint recognition structure 004 is located on the back of the flexible backplane 003, the capacitive fingerprint recognition structure 004 is located in the frame area corresponding to the chip-on-film connection portion 006. In this way, only a very short connecting lead is needed to go around from the edge of the front side of the flexible backplane to the edge of the back side, which is simple and convenient and saves materials.
具体实施时，如果电容式指纹识别结构设置在柔性背板的背面，就没有柔性盖板，容易受到刮伤损坏，为了保护电容式指纹识别结构，较佳地，电容式指纹识别结构位于柔性背板的背面时，显示面板还包括覆盖电容式指纹识别结构的保护薄膜。During specific implementation, if the capacitive fingerprint recognition structure is arranged on the back of the flexible backplane, there will be no flexible cover, which is easily damaged by scratches. In order to protect the capacitive fingerprint recognition structure, preferably, the capacitive fingerprint recognition structure is located on the flexible backplane. When on the back of the panel, the display panel also includes a protective film covering the capacitive fingerprint recognition structure.
由于电容式指纹识别结构设置在边框区域，如果所占的区域太大，会减小显示区域，为了避免这一问题，较佳地，电容式指纹识别结构在柔性背板上的正投影的面积小于2mm*2mm。Since the capacitive fingerprint identification structure is arranged in the frame area, if the occupied area is too large, the display area will be reduced. In order to avoid this problem, preferably, the area of the positive projection of the capacitive fingerprint identification structure on the flexible backplane Less than 2mm*2mm.
具体实施例时，由于柔性背板工艺精度高，在柔性背板上设置的电容式指纹识别结构的精度也会非常好。较佳地，电容式指纹识别结构的像素大小的范围是50μm*50um～80μm*80μm。这样，可以实现的每英寸拥有的像素数目(Pixels Per Inch，PPI)的范围是300～600。其中，像素大小为50μm*50um时，对应的PPI是600；像素大小为80μm*80μm时，对应的PPI是300。In a specific embodiment, due to the high precision of the flexible backplane process, the precision of the capacitive fingerprint identification structure set on the flexible backplane will also be very good. Preferably, the pixel size of the capacitive fingerprint identification structure ranges from 50 μm*50 μm to 80 μm*80 μm. In this way, the number of pixels per inch (Pixels Per Inch, PPI) that can be realized ranges from 300 to 600. Among them, when the pixel size is 50μm*50um, the corresponding PPI is 600; when the pixel size is 80μm*80μm, the corresponding PPI is 300.
具体实施时，较佳地，显示面板可以但不限于为OLED显示面板。During specific implementation, preferably, the display panel may be, but not limited to, an OLED display panel.
下面以一个具体结构为例，对本发明实施例提供的显示面板进行更加详细地描述。A specific structure is taken as an example below to describe the display panel provided by the embodiment of the present invention in more detail.
本实施例中的显示面板为OLED显示面板，如图5所示，除了柔性背板003，柔性盖板004和电容式指纹识别结构002以外，还包括在柔性背板和柔性盖板之间层叠的OLED发光层007、第二绝缘层008、超薄膜封装层009、阻水层0010，超薄膜触摸屏0011和圆形偏光片0012；位于柔性背板正面边框区域的覆晶薄膜连接部和多条连接引线(图中未示出)。The display panel in this embodiment is an OLED display panel. As shown in FIG. 5 , in addition to the flexible backplane 003, the flexible cover 004 and the capacitive fingerprint recognition structure 002, it also includes a laminate between the flexible backplane and the flexible cover. The OLED light emitting layer 007, the second insulating layer 008, the ultra-thin film encapsulation layer 009, the water blocking layer 0010, the ultra-thin film touch screen 0011 and the circular polarizer 0012; Connect the leads (not shown in the picture).
其中，超薄膜封装层009是采用无机材料与有机材料相互堆叠的方式设置，主要防止外界的水氧进入OLED内部，图中的超膜层封装层009包括第一无机膜层091、有机膜层092和第二无机膜层093。其中，无机膜层的材料可以是氮氧化硅。Among them, the ultra-thin-film encapsulation layer 009 is set up by stacking inorganic materials and organic materials, mainly to prevent external water and oxygen from entering into the OLED. 092 and the second inorganic film layer 093. Wherein, the material of the inorganic film layer may be silicon oxynitride.
其中，阻水层0010可以起到阻隔水汽的作用。Wherein, the water blocking layer 0010 can play a role of blocking water vapor.
其中，圆形偏光片0012可以改善柔性背板上的金属反光的问题，较佳地，使用薄偏光片，不增加柔性显示屏的厚度。Among them, the circular polarizer 0012 can improve the problem of metal reflection on the flexible backplane. Preferably, a thin polarizer is used without increasing the thickness of the flexible display.
其中，柔性盖板004覆盖在柔性背板的正面，起到保护作用，是超薄玻璃盖板，其厚度约为50μm，可以灵活弯曲与绕曲。Among them, the flexible cover 004 covers the front of the flexible backplane and plays a protective role. It is an ultra-thin glass cover with a thickness of about 50 μm, which can be flexibly bent and twisted.
其中，柔性背板003上具有多个像素电路，该柔性背板是以塑胶基板为衬底，从而实现柔性。其中，塑胶基板的的材料是PI。像素电路是采用低温多晶硅(Low TemperaturePoly-silicon，LTPS)工艺制得的，该像素电路中包括开关晶体管，开关晶体管包括栅极、绝缘层、源极和漏极。Wherein, there are multiple pixel circuits on the flexible backplane 003 , and the flexible backplane uses a plastic substrate as a substrate to achieve flexibility. Wherein, the material of the plastic substrate is PI. The pixel circuit is manufactured using a Low Temperature Poly-silicon (LTPS) process, and the pixel circuit includes a switch transistor, and the switch transistor includes a gate, an insulating layer, a source and a drain.
其中，电容式指纹识别结构位于柔性背板与柔性盖板之间的边框区域。多条沿第一方向延伸的驱动电极和沿第二方向延伸的感应电极，位于驱动电极和感应电极之间的介质层；驱动电极和感应电极通过各连接引线与覆晶薄膜连接部连接。并且，驱动电极与栅极同层同材质，介质层与第一绝缘层同层同材质，感应电极与源极和漏极同层同材质。图6示出了驱动电极和感应电极的俯视图，N+1条沿列方向延伸的感应电极下方设置有N+1条沿行方向延伸的驱动电极，图中未示出驱动电极和感应电极之间的介质层；当有手指接触时，接收到的手指的谷位置和脊位置的电容信号量不同，从而可以实现指纹识别。Wherein, the capacitive fingerprint recognition structure is located in the frame area between the flexible backplane and the flexible cover. A plurality of driving electrodes extending along the first direction and sensing electrodes extending along the second direction are located in the dielectric layer between the driving electrodes and the sensing electrodes; the driving electrodes and the sensing electrodes are connected to the chip-on-chip connecting portion through connecting leads. Moreover, the driving electrode and the gate electrode have the same layer and the same material, the dielectric layer and the first insulating layer have the same layer and the same material, and the sensing electrode and the source electrode and the drain electrode have the same layer and the same material. Figure 6 shows a top view of the driving electrodes and the sensing electrodes. N+1 driving electrodes extending along the row direction are arranged under the N+1 sensing electrodes extending along the column direction, and the connection between the driving electrodes and the sensing electrodes is not shown in the figure. The dielectric layer between; when there is a finger contact, the amount of capacitance signal received at the valley position and the ridge position of the finger is different, so that fingerprint recognition can be realized.
基于图5所示的结构，参见图7，也可以将电容式指纹识别结构设置在柔性背板背面与覆晶薄膜连接部正对的边框区域，可以节省边框区域的空间，也方便与覆晶薄膜连接部连接。在电容式指纹识别结构的表面上还设置有保护薄膜，以避免刮伤损坏。Based on the structure shown in Figure 5, referring to Figure 7, the capacitive fingerprint recognition structure can also be placed in the frame area where the back of the flexible backplane is directly opposite to the connection part of the chip-on-chip film, which can save space in the frame area and facilitate integration with the chip-on-chip The film connection part is connected. A protective film is also provided on the surface of the capacitive fingerprint identification structure to avoid scratch damage.
本实施例图5和图7所示的显示面板既具有触控功能又具有指纹识别的功能。The display panel shown in FIG. 5 and FIG. 7 of this embodiment has both a touch function and a fingerprint recognition function.
基于同样的发明构思，本发明实施例还提供一种显示装置，包括如以上任意实施例所述的显示面板。Based on the same inventive concept, an embodiment of the present invention further provides a display device, including the display panel as described in any of the above embodiments.
本发明实施例提供的一种显示面板及显示装置中，由于将电容式指纹识别结构设置在柔性背板上，即设置在柔性显示面板中，该电容式指纹识别结构在柔性背板的正面时，覆盖的柔性盖板就是超薄的盖板，因而，可以与手指的距离非常近，该电容式指纹识别结构在柔性背板的背面时，无盖板覆盖，与手指的距离更加近，这样，可以增加电容式指纹识别结构接收到的电容信号量，从而提高了指纹识别效果。In the display panel and display device provided by the embodiments of the present invention, since the capacitive fingerprint recognition structure is arranged on the flexible backplane, that is, in the flexible display panel, when the capacitive fingerprint recognition structure is on the front of the flexible backplane , the covered flexible cover is an ultra-thin cover, so the distance between the finger and the finger can be very close. , can increase the capacitive signal amount received by the capacitive fingerprint identification structure, thereby improving the fingerprint identification effect.
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and equivalent technologies thereof, the present invention also intends to include these modifications and variations.
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