Display panel, fingerprint identification method and display device

Abstract

The invention provides a display panel, a fingerprint identification method and a display device. The display panel comprises a substrate, a fingerprint identification block arranged on the substrate and a driving chip arranged in a non-display area. A plurality of fingerprint recognition devices are arranged in the fingerprint recognition module, each fingerprint recognition device comprises a first electrode, and the first electrodes are located on the sides, away from the substrate, of the fingerprint recognition devices. The first electrodes of at least part of the fingerprint recognition devices are electrically connected with the driving chip through signal lines. Each fingerprint identification block can independently confirm the finger pressing condition and carry out scanning, so that the fingerprints at the pressing positions are collected and compared in a targeted mode, and the response speed of fingerprint identification is improved.

Description

Technical Field

[0001] The present invention relates to the field of display equipment, and in particular to a display panel, a fingerprint recognition method and a display device. Background Art

[0002] With the rapid development of mobile communication technology and smart terminals, the user range of fingerprint verification technology is getting wider and wider. At present, fingerprint recognition function has gradually become a standard feature of smart terminals, and the location of fingerprint recognition devices on terminals and the convenience of use are also receiving more and more attention. Integrating fingerprint recognition functions into the display area to improve user experience has become the industry's goal.

[0003] There are three common fingerprint recognition technologies: capacitive fingerprint recognition, optical fingerprint recognition, and ultrasonic fingerprint recognition. Currently, the most common and common one is optical fingerprint recognition, especially combined with the self-luminous and bendable characteristics of OLED (Organic Light Emitting Diode) display technology, which is a strong support for optical under-screen fingerprint recognition technology. At present, traditional under-screen optical fingerprint recognition technology is only used in a small fixed range under the screen. Summary of the invention

[0004] The purpose of the present invention is to provide a display panel, a fingerprint recognition method and a display device to solve the problems of high production cost and inability to be applied on a large area in the existing under-screen optical fingerprint recognition technology.

[0005] To achieve the above object, the present invention provides a display panel, the display panel comprising a substrate, at least two fingerprint recognition blocks arranged on the substrate, and a driving chip arranged on one side of the substrate. Each of the fingerprint recognition blocks comprises a plurality of fingerprint recognition devices, and the fingerprint recognition devices comprise a first electrode. In each of the fingerprint recognition blocks, at least part of the first electrodes of the fingerprint recognition devices are electrically connected to the input terminal of the driving chip through a signal line, and different fingerprint recognition blocks are connected to different input terminals of the driving chip.

[0006] Furthermore, the input terminals of the driving chip connected to the same fingerprint recognition block are the same. At least some of the fingerprint recognition devices in the same fingerprint recognition block are electrically connected via a common wiring. Preferably, the first electrodes of any two fingerprint recognition devices in the same fingerprint recognition block are electrically connected via the common wiring. Preferably, the display panel further comprises a plurality of light-emitting units arranged on a side of the fingerprint recognition device away from the substrate, and the orthographic projection of the light-emitting unit on the substrate does not overlap with the orthographic projection of the fingerprint recognition device on the substrate.

[0007] Furthermore, the fingerprint recognition device also includes a second electrode located between the first electrode and the substrate and a photosensitive layer provided between the first electrode and the second electrode, and the first electrode is located on the side of the photosensitive layer away from the second electrode. Preferably, the orthographic projection of the photosensitive layer on the substrate is respectively located within the orthographic projection range of the first electrode and the second electrode on the substrate. Preferably, there is a capacitance generating area between the first electrode and the second electrode, and the orthographic projection of the capacitance generating area on the substrate does not overlap with the orthographic projection of the photosensitive layer on the substrate. Preferably, the common wiring is arranged on the same layer as the first electrode, the signal line is arranged on the same layer as the second electrode, and the common wiring is electrically connected to the signal line. Preferably, the first electrode is a transparent electrode. Preferably, the photosensitive layer contains a silicon-based material.

[0008] Furthermore, the substrate includes a first drive circuit electrically connected to the fingerprint recognition device and a second drive circuit electrically connected to the light emitting unit. Preferably, the first drive circuit is electrically connected to the second electrode.

[0009] Furthermore, the display panel has a display area and a non-display area connected to at least part of the display area, at least part of the fingerprint recognition device is distributed in the display area, and the driver chip is located in the non-display area. The display surface also includes a scanning circuit connected to the first drive circuit device. Preferably, the scanning circuit includes at least two scanning drive blocks, the scanning drive block is arranged in the non-display area, and at least two of the fingerprint recognition blocks are located between the two scanning drive blocks. Preferably, in the extension direction of the signal line, the width of the scanning drive block is equal to the width of the fingerprint recognition block.

[0010] Further, the light-emitting unit includes a third electrode, a light-emitting layer and a fourth electrode. The third electrode is insulated and arranged on a side of the fingerprint recognition block away from the substrate. The light-emitting layer is arranged on a side of the third electrode away from the substrate. The fourth electrode is arranged on a side of the light-emitting layer away from the substrate. The projections of the light-emitting unit and the common wiring on the substrate do not overlap. Preferably, the second driving circuit is electrically connected to the third electrode.

[0011] The present invention also provides a fingerprint recognition method, which comprises the following steps:

[0012] Acquire a touch signal, and determine the position of the fingerprint recognition block pressed by the finger according to the acquired touch signal;

[0013] The fingerprint recognition block pressed by the finger is scanned to obtain the fingerprint information on the finger for information recognition.

[0014] Furthermore, the step of obtaining the touch signal also includes: sending the same detection signal to each fingerprint recognition block through the signal line; obtaining the touch signal generated by the change of the detection signal due to the fingerprint recognition block being pressed; and determining the position of the pressed fingerprint recognition block where the touch signal is located.

[0015] Furthermore, the step of scanning the fingerprint recognition block pressed by the finger also includes: the driving chip drives the scanning circuit of the fingerprint recognition block corresponding to the finger pressing position according to the touch signal, and the scanning circuit forms the fingerprint information according to the scanned information.

[0016] The present invention further provides a display device, which includes the display panel as described above.

[0017] The advantages of the present invention are: in a display panel and fingerprint recognition method provided by the present invention, the fingerprint recognition module is designed in blocks, and each fingerprint recognition block can independently identify whether the finger is pressed, and then collect and compare the fingerprint at the pressed position in a targeted manner. Compared with the method of scanning and identifying all areas, the speed of fingerprint recognition can be greatly accelerated, the response speed of full-screen fingerprint recognition can be improved, and the user experience can be enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 is a top view of a display panel in an embodiment of the present invention;

[0020] Figure 2 A top view of a fingerprint recognition block according to an embodiment of the present invention;

[0021] Figure 3 for Figure 2 The cross-sectional structure diagram of the display panel at the AA' line;

[0022] Figure 4 A schematic diagram of the flow of a fingerprint recognition method in an embodiment of the present invention;

[0023] Figure 5 It is a timing diagram of the fingerprint recognition block in the embodiment of the present invention when recognizing the finger pressing position and recognizing the fingerprint.

[0024] The components in the figure are shown as follows:

[0025] Display panel 1; Display area AA;

[0026] Non-display area NA; substrate 10;

[0027] A first driving circuit 11; A second driving circuit 12;

[0028] Fingerprint recognition module 20; Fingerprint recognition block 21;

[0029] Fingerprint recognition device 22; First electrode 25;

[0030] Photosensitive layer 24; Second electrode 23;

[0031] Common wiring 26; First insulating layer 27;

[0032] A second insulating layer 28; A capacitance generating region 29;

[0033] Capacitor C1; Light emitting module 30;

[0034] Light emitting unit 31; Third electrode 32;

[0035] Light emitting layer 33; Fourth electrode 34;

[0036] Pixel definition layer 35; Driving chip 70;

[0037] Signal line 80; Scan circuit 90. DETAILED DESCRIPTION

[0038] The preferred embodiments of the present invention are described below with reference to the drawings in the specification to prove that the present invention can be implemented. The embodiments of the invention can fully introduce the present invention to those skilled in the art, making its technical content clearer and easier to understand. The present invention can be embodied through many different forms of embodiments of the invention, and the protection scope of the present invention is not limited to the embodiments mentioned in the text.

[0039] In the drawings, components with the same structure are indicated by the same numerical reference numerals, and components with similar structures or functions are indicated by similar numerical reference numerals. The size and thickness of each component shown in the drawings are arbitrarily shown, and the present invention does not limit the size and thickness of each component. In order to make the illustration clearer, the thickness of the components is appropriately exaggerated in some places in the drawings.

[0040] In addition, the following descriptions of the various embodiments of the invention are made with reference to the attached diagrams to illustrate specific embodiments of the invention that the present invention can be implemented with. The directional terms mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "side", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer description and understanding of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0041] When some components are described as being "on" another component, the component may be directly placed on the other component; there may also be an intermediate component on which the component is placed, and the intermediate component is placed on the other component. When a component is described as being "mounted on" or "connected to" another component, the two may be understood to be directly "mounted on" or "connected", or one component may be indirectly "mounted on" or "connected to" another component via an intermediate component.

[0042] In the under-screen optical fingerprint recognition solution, the optical fingerprint design is located under the screen, and the touch panel is basically external. The problem with this design is that the cost is relatively high. At least three driver chips are required, one for fingerprint recognition, one for screen display, and one for touch. In addition, the overall thickness of the display panel will also be thick, which is not thin and light enough.

[0043] Furthermore, when using under-screen fingerprint technology to achieve full-screen or large-area fingerprint recognition, the display panel needs to scan from the first row to the last row before the fingerprint recognition can be completed without a touch module display panel or before the external touch integration is completed. When the above full-screen fingerprint recognition technology is applied to a display panel with a large display surface or a high resolution, the fingerprint recognition time will be longer, the response speed will be slower, and the user experience will be poor.

[0044] Based on the above technical problems, an embodiment of the present invention provides a display panel 1, such as Figure 3 As shown, the display panel 1 includes a substrate 10, a fingerprint recognition module 20, a light-emitting module 30 and a driving chip 70. The fingerprint recognition module 20 is disposed on the substrate 10, and includes a plurality of fingerprint recognition blocks 21 and a plurality of signal lines 80, and each fingerprint recognition block 21 is electrically connected to the driving chip 70 through at least one signal line 80.

[0045] like Figure 1As shown, the fingerprint recognition blocks 21 are arranged in an array in the fingerprint recognition module 20, and two adjacent fingerprint recognition blocks 21 are insulated from each other. The fingerprint recognition block 21 includes a plurality of fingerprint recognition devices 22 and a plurality of common wirings 26. The fingerprint recognition devices 22 in the same fingerprint recognition block 21 are electrically connected through the common wirings 26, so that the multiple fingerprint recognition devices 22 in the same fingerprint recognition block 21 are interconnected, thereby forming a fingerprint recognition block 21 capable of independent scanning. Preferably, two adjacent fingerprint recognition devices 22 in the same fingerprint recognition block 21 are electrically connected through the common wirings 26, thereby forming a fingerprint recognition block 21 capable of independent scanning. Figure 3 The fingerprint recognition block 21 has a mesh structure as shown in FIG.

[0046] Specifically, each fingerprint recognition device 22 includes a first electrode 25, a photosensitive layer 24 and a second electrode 23, and the fingerprint recognition module 20 also includes a first insulating layer 27 and a second insulating layer 28. The second electrode 23 is arranged on one side of the substrate 10, and its bottom passes through the insulating film layer in the substrate 10 and is electrically connected to the driving circuit in the substrate 10. The first insulating layer 27 is arranged on the substrate 10 and covers the second electrode 23. A plurality of first openings are arranged in the first insulating layer 27, the first opening corresponds to the second electrode 23, and part of the surface of the second electrode 23 is exposed in the first opening, and the photosensitive layer 24 covers the exposed surface of the second electrode 23 in the first opening. The first electrode 25 is arranged on the first insulating layer 27 and covers the photosensitive layer 24 in the first opening, that is, the first electrode 25 is on the side of the photosensitive layer 24 away from the second electrode 23. The second insulating layer 28 is arranged on the first insulating layer 27 and covers the first electrode 25. The second electrode 24 is a transparent electrode, and its preparation material includes a transparent conductive material (such as ITO), so as to prevent the first electrode 25 from affecting the capture of reflected light by the photosensitive layer 24. The photosensitive layer 24 includes a silicon-based material.

[0047] The photosensitive layer 24 is used to convert light energy into electrical energy, so that the light reflected by the finger can be converted into an electrical signal, thereby realizing the acquisition of fingerprint information. The orthographic projections of the photosensitive layer 24 on the substrate 10 are respectively located within the orthographic projection ranges of the corresponding first electrode 25 and the second electrode 23 on the substrate 10, and the orthographic projection area of ​​the photosensitive layer 24 on the substrate 10 is smaller than the orthographic projection area of ​​the first electrode 25 and the second electrode 23 on the substrate 10, that is, the photosensitive layer 24 is not provided in the partially overlapping area of ​​the first electrode 25 and the second electrode 23. Further, there is a capacitance generation area between the first electrode 25 and the second electrode 23, which is located in the overlapping area of ​​the first electrode 25 and the second electrode 23, and the orthographic projection of the capacitance generation area on the substrate 10 does not overlap with the orthographic projection of the photosensitive layer 24 on the substrate. The first electrode 25 and the second electrode 23 form a capacitor C1 in the capacitor generation area, and the display panel 1 can generate a touch signal through the change in the size of the capacitor C1, and locate the position of the finger touch press through the touch signal.

[0048] Furthermore, the common wiring 26 is arranged in the same layer as the first electrode 25, so that the first electrodes 25 in any two fingerprint recognition devices 22 can be electrically connected through the common electrode 26 located in the same film layer, thereby reducing the difficulty of wiring and reducing the risk of disconnection and breaking. The first electrodes 25 are electrically connected through the common wiring 26 to form a Figure 3 The mesh structure of the fingerprint recognition block 21 is shown in FIG. Moreover, since the common wiring 26 is disposed in the same layer as the first electrode 25, the preparation material of the common wiring 26 is the same as that of the first electrode 25, and both contain transparent conductive materials. The signal line 80 is disposed in the same layer as the second electrode 23, and the signal line 80 can be electrically connected to all the fingerprint recognition devices 22 in the same fingerprint recognition block 21 through the electrical connection with the common wiring 26.

[0049] In each fingerprint recognition block 21, the first electrodes 25 of at least some of the fingerprint recognition devices 22 are electrically connected to the input end of the driver chip 70 through the signal line 80, and different fingerprint recognition blocks 21 are connected to different input ends of the driver chip 70, thereby ensuring that each fingerprint recognition block 21 can operate independently.

[0050] The substrate 10 is an array substrate, which includes a first driving circuit 11 and a second driving circuit 12, and the first driving circuit 11 and the second driving circuit 12 are insulated from each other. The first driving circuit 11 and the second driving circuit 12 are both provided with a plurality of driving devices, and the driving device array is arranged in the substrate 10, which can be a TFT (Thin Film Transistor) device. Specifically, the first driving circuit 11 is electrically connected to the second electrode 23 of the corresponding fingerprint recognition device 22, which is used to control the operation of the fingerprint recognition device 22 in the fingerprint recognition block 21; the second driving circuit 12 is electrically connected to the corresponding light-emitting unit 31 in the light-emitting module 30, which is used to control the operation of the corresponding light-emitting unit 31.

[0051] Furthermore, if Figure 1 As shown, the substrate 10 is also provided with a scanning circuit 90, which is a GIP (Gate in Panel) circuit, which is connected to the first driving circuit 11. Driven by the driving chip 70, it sends a scanning signal to the corresponding fingerprint recognition block 21. Driven by the scanning signal, the fingerprint recognition block 21 performs line-by-line scanning to obtain the fingerprint information on the finger. The scanning circuit 90 includes at least two scanning drive blocks 91, and a scanning drive block 91 is respectively provided on both sides of the fingerprint recognition block 21, and at least two fingerprint recognition blocks 21 are located between the two scanning drive blocks 91, that is, a scanning drive block 91 is respectively provided on both sides of each row of fingerprint recognition blocks 21. In the extension direction of the signal line 80, the width of the scanning drive block 91 is equal to the width of the fingerprint recognition block 21.

[0052] like Figure 1 As shown in , the display panel 1 also has a display area AA and a non-display area NA surrounding the display area AA. Specifically, the fingerprint recognition blocks 21 are arranged in an array in the display area AA, so that the display area AA can realize full-screen fingerprint recognition while realizing picture display, solving the limitations of existing fingerprint recognition, thereby improving the user experience. A plurality of drive control modules, such as a drive chip 70, a scanning drive block 91, etc., are arranged in the non-display area NA to control the devices in the display area AA. One end of the signal line 80 is electrically connected to the fingerprint recognition block 21 located in the display area AA, and the other end thereof extends from the display area AA to the non-display area NA, and is electrically connected to the drive chip 70 located in the non-display area NA. The fingerprint recognition block 21 in the display area AA is used to sense the finger position and transmit the sensed information to the drive chip 70 located in the non-display area NA through the signal line 80, and the drive chip 70 then drives the corresponding fingerprint recognition block 21 for fingerprint recognition according to the position information.

[0053] like Figure 2 and Figure 3As shown, a plurality of light-emitting units 31 are provided in the light-emitting module 30, and the orthographic projection of the light-emitting unit 31 on the substrate 10 does not overlap with the orthographic projection of the fingerprint recognition device 22 and the common wiring 26 on the substrate 10, thereby avoiding the common wiring 26 from affecting the electrical connection of the light-emitting unit 31 with the second driving circuit 12, and preventing the light-emitting unit 31 and the common wiring 26 from short-circuiting. The light-emitting unit 31 includes a third electrode 32, a light-emitting layer 33 and a fourth electrode 34. Specifically, the light-emitting module 30 also includes a pixel definition layer 35. The third electrode 32 is provided on the surface of the second insulating layer 28 away from the substrate 10, and is electrically connected to the second driving circuit 12 in the substrate 10 through the wiring. The pixel definition layer 35 is provided on the second insulating layer 28 and covers the third electrode 32. A second opening is provided in the pixel definition layer 35, the second opening corresponds to the third electrode 32, and a portion of the upper surface of the third electrode 32 is exposed in the second opening. The light-emitting layer 33 is disposed on the third electrode 32 in the second opening and covers the exposed surface of the third electrode 32 in the second opening. The fourth electrode 34 is disposed on the pixel definition layer 35 and covers the light-emitting layer 33 in the second opening. The light-emitting unit 31 emits light to form a display screen. At the same time, when performing fingerprint recognition, the light-emitting unit 31 can also emit light to the finger, and the emitted light will be reflected according to the pattern of the fingerprint after encountering the finger, and the fingerprint recognition device 22 will form fingerprint information by capturing the light reflected by the finger.

[0054] In the display panel 1 provided in the embodiment of the present invention, a plurality of independently drivable fingerprint recognition blocks 21 are arranged in the fingerprint recognition film group 20, and each fingerprint recognition block 21 is provided with a plurality of fingerprint recognition devices 22 capable of sensing touch positions and performing light sensing. Figure 5 As shown in , when the finger pressing position is identified, the driver chip 70 transmits a detection signal of the same size to each fingerprint recognition block 21 through the signal line 80. The pressing of the finger will cause the capacitance C1 at the corresponding position to change, and the corresponding fingerprint recognition device 22 will first sense the change of its own capacitance C1, and affect the size of the overall capacitance of the fingerprint recognition block 21 through the common line 26. The detection signal will generate a touch signal under the change of capacitance, and the touch signal will be fed back to the driver chip 70 through the signal line 80. The driver chip 70 can locate and identify the position where the finger is pressed according to the touch signal, and drive the corresponding scanning circuit 90 to perform targeted line-by-line scanning on the fingerprint recognition block 21 where the finger is pressed, so as to obtain fingerprint information. That is, in the embodiment of the present invention, because the position where the finger is pressed has been found, when performing fingerprint recognition, it is not necessary to scan all positions of the full screen line by line, and only the position where the finger is pressed needs to be scanned and recognized, thereby speeding up the fingerprint recognition speed, reducing the response time of the full-screen fingerprint recognition, and improving the user experience.

[0055] Specifically, an embodiment of the present invention further provides a fingerprint recognition method, and the display panel 1 described above adopts the fingerprint recognition method for recognition. The process of the fingerprint recognition method is as follows: Figure 4 As shown, it includes steps S10-S20.

[0056] Step S10) acquiring a touch signal, and determining the position of the fingerprint recognition block pressed by the finger according to the acquired touch signal. This step specifically includes:

[0057] The driver chip 70 inputs the same detection signal to each fingerprint recognition block 21 in the fingerprint recognition module 20 through the signal line 80 , that is, each fingerprint recognition block 21 is simultaneously connected to the detection signal of the same voltage (eg, 0V) through the driver chip 70 .

[0058] like Figures 1 to 4 As shown, when a finger touches the display panel 1, each fingerprint recognition device 22 in the fingerprint recognition block 21 at the finger pressing position will first sense the change in capacitance C1 caused by the finger pressing. Among them, a smaller capacitance C1 will be generated between the second electrode 23 and the second electrode 25 of the fingerprint recognition device 22 that are not in contact with the photosensitive layer 24 (i.e., the capacitance generation area), and the smaller capacitances in different fingerprint recognition devices 22 in the same fingerprint recognition block 21 will converge into a larger capacitance under the influence of parallel connection, causing the capacitance in the fingerprint recognition block 21 at the pressing position to change. The change in capacitance further causes the change in the detection signal, thereby generating a touch signal.

[0059] The fingerprint recognition block 21 at the pressed position sends a touch signal to the driver chip 70 through the corresponding signal line 80. The driver chip 70 can determine the position where the finger is pressed by the acquired touch signal, thereby acquiring the position where the finger is pressed.

[0060] Step S20) Scanning the fingerprint recognition block pressed by the finger to obtain fingerprint information on the finger for information recognition. This step specifically includes:

[0061] The driver chip 70 obtains the position of the fingerprint recognition block 21 pressed by the finger according to the received touch signal, and drives the scanning circuit 90 corresponding to the fingerprint recognition block 21 at the pressed position, that is, drives the scanning driving block 91 corresponding to the fingerprint recognition block 21 at the pressed position to send a scanning signal to the corresponding first driving circuit 11 row by row, and the corresponding first driving circuit 11 drives the corresponding fingerprint recognition device 22 according to the scanning signal, thereby realizing targeted row by row scanning of the fingerprint recognition block 21 at the pressed position. The fingerprint recognition device 22 receives the light reflected by the finger and converts the light into an electrical signal. The multiple electrical signals in the fingerprint recognition block 21 are combined to form fingerprint information, and the acquired fingerprint information is transmitted to the recognition device (such as a processor of a display device, etc.) for recognition.

[0062] The fingerprint recognition module 20 first obtains the position information of the finger, and then drives only the pressed fingerprint recognition block 21 to scan according to the position information. Since only the area where the finger touches and presses is scanned, not all position areas are scanned, and only the electrical signal generated by the fingerprint recognition device 22 in the area needs to be collected and processed, thereby greatly speeding up the fingerprint recognition speed, increasing the sensitivity of fingerprint recognition, and reducing the power consumption of fingerprint recognition compared to the fingerprint recognition method of scanning from the first row to the last row in the prior art.

[0063] The present invention also provides a display device, which may be an OLED (organic electroluminescent) display device, comprising a display panel 1 using the fingerprint recognition method described above. The display device may be any display device with a display function, such as a mobile phone, a tablet computer, etc.

[0064] In the display panel and fingerprint recognition method provided in the embodiments of the present invention, the fingerprint recognition module is designed in blocks, and each fingerprint recognition block can independently identify the pressing position of the finger through the change of capacitance, and then collect and compare the fingerprint at the pressing position, instead of scanning and identifying all areas. This can greatly speed up the fingerprint recognition speed, reduce the response time of full-screen fingerprint recognition, improve the response speed, and enhance the user experience.

[0065] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. A display panel, characterized in that: include: substrate; At least two fingerprint recognition blocks are provided on the substrate, each of the fingerprint recognition blocks includes a plurality of fingerprint recognition devices, and the fingerprint recognition devices include a first electrode; Driver chip, In each of the fingerprint recognition blocks, at least part of the first electrodes of the fingerprint recognition devices are electrically connected to the input terminal of the driving chip through a signal line, and different fingerprint recognition blocks are connected to different input terminals of the driving chip.

2. The display panel according to claim 1, wherein: The input terminals of the driving chip connected to the same fingerprint recognition block are the same; At least some of the fingerprint recognition devices in the same fingerprint recognition block are electrically connected via a common wiring; Preferably, the first electrodes of any two fingerprint recognition devices in the same fingerprint recognition block are electrically connected via the common wiring; Preferably, the display panel further includes: A plurality of light-emitting units are arranged on a side of the fingerprint recognition device away from the substrate, and the orthographic projection of the light-emitting unit on the substrate does not overlap with the orthographic projection of the fingerprint recognition device on the substrate.

3. The display panel according to claim 2, wherein: The fingerprint recognition device also includes: a second electrode, located between the first electrode and the substrate; A photosensitive layer, disposed between the first electrode and the second electrode; The first electrode is located on a side of the photosensitive layer away from the second electrode; Preferably, the orthographic projection of the photosensitive layer on the substrate is respectively located within the orthographic projection range of the first electrode and the second electrode on the substrate; Preferably, a capacitance generating region is provided between the first electrode and the second electrode, and an orthographic projection of the capacitance generating region on the substrate does not overlap with an orthographic projection of the photosensitive layer on the substrate; Preferably, the common wiring is arranged on the same layer as the first electrode, the signal line is arranged on the same layer as the second electrode, and the common wiring is electrically connected to the signal line; Preferably, the first electrode is a transparent electrode; Preferably, the photosensitive layer comprises a silicon-based material.

4. The display panel according to claim 3, wherein: The substrate comprises: A first driving circuit, electrically connected to the fingerprint recognition device; A second driving circuit is electrically connected to the light emitting unit; Preferably, the first driving circuit is electrically connected to the second electrode.

5. The display panel according to claim 4, wherein: having a display area and a non-display area connected to at least part of the display area; At least part of the fingerprint recognition devices are distributed in the display area, and the driving chip is located in the non-display area; The display panel further includes: A scanning circuit connected to the first driving circuit; Preferably, the scanning circuit comprises at least two scanning driving blocks, the scanning driving blocks are arranged in the non-display area, and at least two fingerprint recognition blocks are located between the two scanning driving blocks; Preferably, in the extending direction of the signal line, the width of the scan driving block is equal to the width of the fingerprint recognition block.

6. The display panel according to claim 4, wherein: The light emitting unit comprises: A third electrode is insulated and arranged on a side of the fingerprint recognition block away from the substrate; A light-emitting layer is provided on a side of the third electrode away from the substrate; a fourth electrode, disposed on a side of the light-emitting layer away from the substrate; The projections of the light-emitting unit and the common wiring on the substrate do not overlap; Preferably, the second driving circuit is electrically connected to the third electrode.

7. A fingerprint recognition method, characterized in that: include: Acquire a touch signal, and determine the position of the fingerprint recognition block pressed by the finger according to the acquired touch signal; The fingerprint recognition block pressed by the finger is scanned to obtain the fingerprint information on the finger for information recognition.

8. The fingerprint recognition method according to claim 7, characterized in that: The step of acquiring the touch signal also includes: sending the same detection signal to each fingerprint recognition block through a signal line; acquiring the touch signal generated by the change of the detection signal due to the fingerprint recognition block being pressed; and determining the position of the pressed fingerprint recognition block where the touch signal is located.

9. The fingerprint recognition method according to claim 7, characterized in that: The step of scanning the fingerprint recognition block pressed by the finger also includes: driving a scanning circuit of the fingerprint recognition block corresponding to the finger pressing position according to the touch signal, and the scanning circuit forms the fingerprint information according to the scanned information.

10. A display device, characterized in that: Comprising a display panel as described in any one of claims 1-6.

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