CN111176487B

CN111176487B - Display panel, driving method thereof and display device

Info

Publication number: CN111176487B
Application number: CN201911415692.5A
Authority: CN
Inventors: 林孚银
Original assignee: Xiamen Tianma Microelectronics Co Ltd
Current assignee: Xiamen Tianma Microelectronics Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2022-08-30
Anticipated expiration: 2039-12-31
Also published as: CN111176487A

Abstract

The invention discloses a display panel, a driving method thereof and a display device, belonging to the technical field of display, wherein the display panel comprises a fingerprint identification driving circuit, a plurality of fingerprint scanning lines, a plurality of fingerprint signal lines and a plurality of fingerprint identification units arranged in an array; the fingerprint identification unit groups are arranged in an array mode, and each fingerprint identification unit group comprises a plurality of fingerprint identification units arranged in an array mode; the touch control device also comprises a touch control driving circuit and a plurality of optical touch control units arranged in an array; multiplexing a fingerprint identification unit group into an optical touch unit; the fingerprint identification driving circuit and the touch control driving circuit are electrically connected with the fingerprint scanning line. The driving method of the display panel comprises an optical touch stage and a fingerprint identification stage. The display device comprises the display panel. The invention can integrate the fingerprint identification and the touch control function, reduce the risk of split screen display, greatly save the fingerprint scanning time and also save the power consumption.

Description

Display panel, driving method thereof and display device

Technical Field

The invention relates to the technical field of display, in particular to a display panel, a driving method thereof and a display device.

Background

The fingerprint is a vein formed by concave-convex skin on the finger abdomen at the tail end of a human finger, also called a palm print, namely a raised line on the epidermis, and the fingerprint of a person is different from the fingerprint of the person because the fingerprint of the person is subjected to the combined action of heredity and environment and is closely related to the health of the human body, and the fingerprint is called a human identity card because the repetition rate of the fingerprint is extremely low and is about 150 parts per billion. Based on the difference characteristics of fingerprints, along with the development of science and technology, a variety of display devices with fingerprint identification functions, such as mobile phones, tablet computers, intelligent wearable devices and the like, appear on the market. Before a user operates the display device with the fingerprint identification function, the user can carry out authority verification only by touching the display device with a finger, and the authority verification process is simplified. In addition, with the increase of fingerprint identification application scenes, the requirements for full screen fingerprint identification and fingerprint identification precision are gradually increased. Among the display device that prior art provided, need additionally increase the fingerprint identification module in order to realize the fingerprint identification function, after making respectively and accomplishing display panel and fingerprint identification module, assemble the two in order to realize the electricity and connect, consequently increased display device's technology processing procedure to the fingerprint identification module probably occupies certain region in display device, is unfavorable for realizing the full face screen. With the rise of the comprehensive screen technology, fingerprint identification is gradually developed from the design outside the display screen to the design inside the display screen, namely, the fingerprint identification technology in the screen is developed to pursue higher screen occupation ratio.

With the development of display technology, Touch Screen panels (Touch screens) have gradually spread throughout the lives of people. At present, a touch screen can be divided into: an Add on Mode Touch Panel (Add on Touch Panel), and an In Cell Touch Panel (In Cell Touch Panel). The externally-hung touch screen is produced by separately producing a touch screen and a Liquid Crystal Display (LCD), and then the touch screen and the LCD are bonded together to form the LCD with a touch function, but the externally-hung touch screen has the defects of low light transmittance, thick module and the like. And embedded touch-control electrode with the touch-sensitive screen is embedded inside liquid crystal display, can the holistic thickness of attenuate module, promotes the light transmissivity, consequently receives each big panel producer favour.

In the display device with the fingerprint identification and touch control functions in the prior art, the touch control structure and the fingerprint identification system are separately designed, and for an embedded touch screen, each touch control electrode is wired to a touch control driving chip through metal, and due to the fact that load difference caused by the length difference of the wired metal is distributed, screen splitting risk is easy to occur.

Therefore, it is an urgent technical problem to provide a display panel, a driving method thereof, and a display device that can integrate fingerprint identification and touch control functions, reduce the risk of split-screen display, and improve the display effect without affecting the fingerprint identification and touch control functions.

Disclosure of Invention

In view of this, the invention provides a display panel, a driving method thereof and a display device, so as to solve the problem that in the prior art, when a fingerprint identification function and a touch control function are separately designed, a screen splitting risk is easily caused, and a display effect is influenced.

The present invention provides a display panel, comprising: the fingerprint identification driving circuit comprises a fingerprint identification driving circuit, a plurality of fingerprint scanning lines which are arranged along a second direction and extend along the first direction, a plurality of fingerprint signal lines which are arranged along the first direction and extend along the second direction, and a plurality of fingerprint identification units which are arranged in an array manner, wherein the fingerprint scanning lines and the fingerprint signal lines are crossed and insulated to define areas where the plurality of fingerprint identification units are located; wherein the first direction intersects the second direction; the fingerprint identification driving circuit drives the fingerprint identification unit to detect fingerprint information; the display panel comprises a plurality of fingerprint identification unit groups which are arranged in an array, and one fingerprint identification unit group comprises a plurality of fingerprint identification units which are arranged in an array; the touch control system also comprises a touch control driving circuit and a plurality of optical touch control units arranged in an array, wherein the touch control driving circuit drives the optical touch control units to detect touch positions; multiplexing a fingerprint identification unit group into an optical touch unit; the fingerprint identification driving circuit and the touch control driving circuit are electrically connected with the fingerprint scanning line.

Based on the same inventive concept, the invention also provides a driving method of the display panel, which is used for driving the display panel to realize fingerprint identification and touch control functions; the driving method includes: an optical touch stage and a fingerprint identification stage; in the optical touch stage, the touch driving circuit provides a touch scanning signal to each fingerprint identification unit through a fingerprint scanning line, when the main body touches the display panel, the optical touch units sense illumination changes, and the external driving circuit receives an optical detection signal of the optical touch units through a fingerprint signal line, determines a touch position and realizes optical touch detection; in the fingerprint identification stage, the fingerprint identification drive circuit provides fingerprint identification scanning signals for the fingerprint identification unit at the touch position, and the fingerprint identification unit at the touch position transmits fingerprint detection signals to the external drive circuit through a fingerprint signal line to realize fingerprint information detection.

Based on the same inventive concept, the invention also provides a display device, which comprises the display panel.

Compared with the prior art, the display panel, the driving method thereof and the display device provided by the invention at least realize the following beneficial effects:

according to the display panel, one fingerprint identification unit group is multiplexed into one optical touch unit for use, the plurality of fingerprint identification unit groups are uniformly arranged in an array mode, and one fingerprint identification unit group comprises a plurality of fingerprint identification units which are uniformly arranged in an array mode. In the optical touch stage, the touch driving circuit provides the same touch scanning signals to all the fingerprint scanning lines of each row of fingerprint identification unit groups to realize the array driving of the fingerprint identification unit groups, namely the array driving of the optical touch unit is realized. In the fingerprint identification stage, the fingerprint identification driving circuit only needs to provide a fingerprint identification scanning signal for the fingerprint identification unit at the touch position, only the fingerprint identification unit at the touch position is opened for fingerprint identification work, and the fingerprint driving circuit can not perform scanning work on the fingerprint identification units corresponding to other positions and enters a standby state, so that the power consumption can be saved; and finally, the fingerprint identification unit at the touch position transmits the result of fingerprint identification detection to the fingerprint detection result receiving unit through a fingerprint signal line corresponding to the touch position, so that fingerprint information detection is realized. When the fingerprint identification is carried out, the fingerprint identification driving circuit only needs to scan and drive the fingerprint identification unit at the touch position, so that the fingerprint scanning time can be greatly saved, and meanwhile, the power consumption can be saved. The fingerprint identification and touch control functions are integrated, the fingerprint identification structure can be compatible with the touch control function, a touch control circuit is not required to be additionally designed, the design cost is reduced, and in addition, the load of the display panel is reduced due to the fact that the additional touch control circuit part is reduced. According to the display panel, the touch function is realized without additionally cutting and multiplexing the common electrode into the touch electrode, so that the screen splitting risk caused by the impedance difference of the touch wiring is effectively avoided, and the display quality of the display panel can be improved.

Of course, it is not necessary for any product in which the present invention is practiced to be specifically designed to achieve all of the above-described technical effects simultaneously.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic plan view of a display panel according to an embodiment of the present invention;

FIG. 2 is an equivalent circuit diagram of a fingerprint identification unit according to an embodiment of the present invention;

FIG. 3 is a schematic plan view of another display panel according to an embodiment of the present invention;

FIG. 4 is a simplified frame diagram of FIG. 3;

FIG. 5 is a schematic plane structure diagram of another display panel according to an embodiment of the present invention;

FIG. 6 is a simplified frame diagram of FIG. 5;

FIG. 7 is a schematic diagram of a planar structure of another display panel according to an embodiment of the present invention;

FIG. 8 is a diagram of the frame relationship after the final combination of optical touch and capacitive touch;

FIG. 9 is a schematic plan view of another display panel according to an embodiment of the present invention;

fig. 10 is a schematic diagram of an equivalent circuit connection structure of a display panel according to an embodiment of the invention;

FIG. 11 is a partial enlarged view of the drive circuit portion of FIG. 10;

FIG. 12 is a schematic diagram of an equivalent circuit connection structure of another display panel according to an embodiment of the invention;

fig. 13 is a partial enlarged view of the drive circuit portion of fig. 12;

figure 14 is a schematic diagram of the structure of the clock selection unit 700 in figure 12,

FIG. 15 is a schematic diagram of an equivalent circuit connection structure of another display panel according to an embodiment of the invention;

FIG. 16 is an enlarged partial view of the portion of the multiplexing circuit of FIG. 15;

FIG. 17 is a timing diagram of the input signals of the control signal lines in FIGS. 15 and 16 during the optical touch phase;

figure 18 is a timing diagram of the feed signals of the control signal lines of figures 15 and 16 during the fingerprinting phase,

fig. 19 is a flowchart of a driving method of a display panel according to an embodiment of the present invention;

fig. 20 is a flow chart of another driving method of a display panel according to an embodiment of the present invention;

FIG. 21 is a simplified frame diagram of FIG. 15;

FIG. 22 is a timing diagram of input signals of the display panel of FIG. 21 during an optical touch phase;

FIG. 23 is a timing diagram of input signals of the display panel of FIG. 21 during a fingerprint recognition phase;

FIG. 24 is a timing diagram of an alternative input signal to the display panel of FIG. 21 during a fingerprinting stage;

fig. 25 is a flow chart of another driving method of a display panel according to an embodiment of the present invention;

fig. 26 is a schematic structural diagram of a display device according to an embodiment of the present invention.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

Referring to fig. 1, fig. 1 is a schematic plan view of a display panel according to an embodiment of the present invention, where the display panel 000 includes: the fingerprint identification driving circuit 10, a plurality of fingerprint scanning lines E which are arranged along the second direction Y and extend along the first direction X, a plurality of fingerprint signal lines F which are arranged along the first direction X and extend along the second direction Y, and a plurality of fingerprint identification units 20 which are arranged in an array manner, wherein the fingerprint scanning lines E and the fingerprint signal lines F are crossed and insulated to define the areas where the plurality of fingerprint identification units 20 are located, the fingerprint identification units on the same row are electrically connected with the same fingerprint scanning line E, and the fingerprint identification units on the same column are electrically connected with the same fingerprint signal line F; wherein the first direction X intersects the second direction Y, preferably the first direction X and the second direction Y are perpendicular to each other; the fingerprint identification driving circuit 10 drives the fingerprint identification unit 20 to detect fingerprint information; the display panel 000 includes a plurality of fingerprint identification unit groups 200 arranged in an array, and one fingerprint identification unit group 200 includes a plurality of fingerprint identification units 20 arranged in an array; the touch control device further comprises a touch control driving circuit 30 and a plurality of optical touch control units 40 arranged in an array, wherein the touch control driving circuit 30 drives the optical touch control units 40 to detect touch positions; one fingerprint identification unit group 200 is multiplexed into one optical touch unit 40; the fingerprint identification driving circuit 10 and the touch driving circuit 30 are electrically connected to the fingerprint scanning line E.

Specifically, the display panel 000 of the present embodiment includes a plurality of fingerprint identification units 20 arranged in an array, wherein the plurality of fingerprint identification units 20 arranged along the first direction X form a fingerprint identification unit row 20H, the plurality of fingerprint identification unit rows 20H are arranged along the second direction Y, the plurality of fingerprint identification units 20 arranged along the second direction Y form a fingerprint identification unit column 20L, the plurality of fingerprint identification unit columns 20L are arranged along the first direction X, the same row of fingerprint identification units is electrically connected to the same fingerprint scanning line E, the same column of fingerprint identification units is electrically connected to the same fingerprint signal line F, the fingerprint identification driving circuit 10 is electrically connected to the fingerprint scanning line E, the fingerprint identification driving circuit 10 drives the fingerprint identification units 20 to detect fingerprint information, that is, the present embodiment is electrically connected to each fingerprint scanning line E through the fingerprint identification driving circuit 10, the same fingerprint scanning line E is used to provide a fingerprint identification scanning signal to the same row of fingerprint identification units, so as to realize the array driving of the fingerprint identification unit 20, complete the fingerprint identification, and then transmit the result of the fingerprint identification detection to the fingerprint detection result receiving unit (not shown in the figure, can be a driving chip) through the fingerprint signal line F.

The display panel 000 of the present embodiment includes a plurality of fingerprint identification unit groups 200 arranged in an array, wherein the plurality of fingerprint identification unit groups 200 arranged along the first direction X form a fingerprint identification unit group row 200H, the plurality of fingerprint identification unit group rows 200H are arranged along the second direction Y, the plurality of fingerprint identification unit groups 200 arranged along the second direction Y form a fingerprint identification unit group column 200L, and the plurality of fingerprint identification unit group columns 200L are arranged along the first direction X. One fingerprint identification unit group 200 includes a plurality of fingerprint identification units 20 arranged in an array, wherein one fingerprint identification unit group 200 is reused as one optical touch unit 40. The touch driving circuit 30 is electrically connected to the fingerprint scanning lines E, and the touch driving circuit 30 drives the optical touch unit 40 to detect the touch position, that is, the touch driving circuit 30 is electrically connected to all the fingerprint scanning lines E in each fingerprint identification unit group 200, so that the touch driving circuit 30 provides the same touch scanning signal to all the fingerprint scanning lines E of each fingerprint identification unit group 200, thereby implementing the array driving of the optical touch unit 40, completing the detection of the optical touch position, and then transmitting the result of the touch position detection to the touch detection result receiving unit (not shown, which may be a driving chip) through the fingerprint signal lines F.

Therefore, the display panel 000 of the present embodiment is used by multiplexing one fingerprint identification unit group 200 into one optical touch unit 40, the plurality of fingerprint identification unit groups 200 are uniformly arranged in an array, and one fingerprint identification unit group 200 includes a plurality of fingerprint identification units 20 uniformly arranged in an array. In the optical touch stage, the touch driving circuit 30 provides the same touch scanning signal to all the fingerprint scanning lines E of each row of the fingerprint identification unit group 200 to realize the array driving of the fingerprint identification unit group 200, that is, the array driving of the optical touch unit 40 is realized, when the touch subject touches the display panel 000, the optical touch unit 40 senses the illumination change to complete the optical touch detection, and then the result of the touch position detection is transmitted to the touch detection result receiving unit through the fingerprint signal line F, so that the touch position can be determined, and the touch position detection is realized. In the fingerprint identification stage, the fingerprint identification driving circuit 10 only needs to provide a fingerprint identification scanning signal to the fingerprint identification unit 20 at the touch position, only the fingerprint identification unit 20 at the touch position is opened to perform fingerprint identification work, and the fingerprint driving circuit 10 can enter a standby state without performing scanning work on the fingerprint identification units 20 corresponding to other positions, so that power consumption can be saved; finally, the fingerprint identification unit 20 at the touch position transmits the result of fingerprint identification detection to the fingerprint detection result receiving unit through the fingerprint signal line F corresponding to the touch position, so as to realize fingerprint information detection. Therefore, when the fingerprint is identified in this embodiment, the fingerprint identification driving circuit 10 only needs to scan and drive the fingerprint identification unit 20 at the touch position, so that the fingerprint scanning time can be greatly saved, and the power consumption can also be saved.

In the present embodiment, one fingerprint identification unit group 200 formed by a plurality of fingerprint identification units 20 arranged in an array is reused as one optical touch unit 40, and the fingerprint identification and the touch function are integrated into one. In the embedded touch screen in the related art, the touch electrodes multiplexed by each common electrode are connected to the driving chip through the touch wires, so that the load is reduced, the attenuation of touch signals is reduced, each touch electrode is generally designed with two touch wires connected and limited by the size of the panel space, and the situation that part of the touch electrodes are connected by only one touch wire can occur, so that the impedance difference of the touch wires is obvious, and the risk of screen splitting is high. In the embodiment, the touch function of the display panel 000 is realized without a method of additionally cutting and multiplexing the common electrode into the touch electrode, so that the risk of screen splitting caused by impedance difference of the touch routing lines is effectively avoided, and the display quality of the display panel 000 can be improved.

It should be noted that, this embodiment only schematically illustrates a structure of the display panel 000 related to the technical solution of this embodiment, and it may be understood that the display panel 000 may further include other structures capable of implementing a display function, such as a pixel unit, for example, the description of the structure of the display panel in the prior art may be specifically referred to, and details of this embodiment are not repeated herein. In order to clearly illustrate the technical solution of the present embodiment, the fingerprint identification driving circuit 10 and the touch driving circuit 30 in fig. 1 are only illustrated by using a frame, and when the embodiment is implemented, the driving circuit can be designed according to actual requirements, and the embodiment is not limited in particular. It should be understood that fig. 1 is a schematic diagram illustrating an arrangement of the fingerprint identification unit 20 and the fingerprint identification unit group 200/optical touch unit 40 on the display panel 000, and does not represent actual sizes and numbers of the fingerprint identification unit 20 and the fingerprint identification unit group 200/optical touch unit 40, and the design may be performed according to actual requirements in a specific implementation.

It should be further noted that, this embodiment only exemplifies that the fingerprint identification driving circuit 10 and the touch driving circuit 30 are both single-side driving circuits, and the actual design may be double-side driving or double-side cross driving, but the implementation principle and the implementation method are similar, and are not described again.

In some optional embodiments, please refer to fig. 1 and fig. 2 in combination, fig. 2 is an equivalent circuit diagram of a fingerprint identification unit according to an embodiment of the present invention, in this embodiment, the fingerprint identification unit 20 includes a second switching transistor 201, a photodiode 202, and a first capacitor 203 electrically connected to each other, a control terminal of the second switching transistor 201 is electrically connected to a fingerprint scanning line E, a source of the second switching transistor 201 is electrically connected to a first electrode of the photodiode 202 and a first electrode of the first capacitor 203, respectively, and a drain of the second switching transistor 201 is electrically connected to a fingerprint signal line F; the second pole of the photodiode 202 and the second pole of the first capacitor 203 are both electrically connected to a ground signal. The first capacitor 203 can be used as a storage capacitor, and when the fingerprint identification unit 20 performs light sensing, the first capacitor 203 and the photodiode 202 form a discharge circuit to obtain a corresponding light sensing signal. Specifically, the first capacitor 203 is connected in parallel with the photodiode 202, that is, one end of the first capacitor 203 is electrically connected to the cathode of the photodiode 202, the other end of the first capacitor 203 is grounded, when the second switching transistor 201 is turned off, the first capacitor 203 and the photodiode 202 form a discharge loop, and the voltage at the end of the first capacitor 203 connected to the cathode of the photodiode 202 also gradually decreases. By arranging the first capacitor 203, the capacitance capacity of the fingerprint identification unit 20 is increased, so that the voltage drop speed on the cathode of the photodiode 202 is reduced, an effective photosensitive signal can be acquired, and the sensing precision is improved. Alternatively, the photodiode 202 may be replaced with a light sensing transistor.

Optionally, the display panel 000 of this embodiment may be a liquid crystal display panel integrating the fingerprint identification unit 20 in the panel, a fingerprint identification unit 20 may be disposed in a non-opening area of each sub-pixel of the display panel 000 for fingerprint identification, and an opening area of the sub-pixel is disposed for display, light emitted from the backlight module (not shown in the figure) is emitted through the display panel 000, light reflected by a finger is incident on the fingerprint identification unit 20 to generate an electrical signal and then detect fingerprint information, and a data line (not shown in the figure) for display and a fingerprint signal line F for fingerprint identification are separately disposed. Optionally, the equivalent circuit of the fingerprint identification unit 20 may be a passive detection circuit, that is, may be a photoelectric fingerprint identification unit, that is, includes a second switch transistor 201 and a photodiode 202 electrically connected, a gate of the second switch transistor 201 is electrically connected to a fingerprint scanning line E, a source of the second switch transistor 201 is electrically connected to a first pole of the photodiode 202, a drain of the second switch transistor 201 is electrically connected to a fingerprint signal line F, the fingerprint scanning line E is electrically connected to a gate of the second switch transistor 201, the second switch transistor 201 may be activated by providing a scanning electrical signal to the fingerprint scanning line E through the fingerprint identification driving circuit 10, so that the fingerprint identification unit 20 is opened line by line along the second direction Y, when the photodiode 202 identifies a change of light, that is, when a finger contacts a screen, a light source is reflected when it irradiates on a valley line and a ridge line of the fingerprint, since the reflection angles of the valley line and the ridge line and the intensity of the reflected light are different, the light is projected onto the photodiode 202, the resistance of the photodiode 202 is changed differently, and thus the current is changed differently, and the current is transmitted to the fingerprint signal line F through the second switching transistor 201 in a conducting state, so that the fingerprint identification signal receiving unit (not shown) connected to the fingerprint signal line F identifies the valley line and the ridge line of the fingerprint.

It should be noted that, this embodiment only exemplifies an optional equivalent circuit structure of the fingerprint identification unit 20, but is not limited to this structure, and the equivalent circuit of the fingerprint identification unit 20 may also be other circuit structures, such as an active detection circuit, and the applied driving signal is loaded on the finger to enhance the charges on the surface of the finger, so that the fingerprint identification unit receives the electric field signal and amplifies the signal, and the electric field induced by the fingerprint identification unit is also inconsistent according to the unevenness of the fingerprint, thereby reproducing the valleys and ridges of the fingerprint.

In some optional embodiments, please continue to refer to fig. 1, in the present embodiment, the number of rows of the fingerprint identification units 20 in each fingerprint identification unit group 200 is the same; the number of columns of fingerprint identification cells 20 within each fingerprint identification cell group 200 is the same.

The present embodiment further explains that the number of rows of the fingerprint identification units 20 in each fingerprint identification unit group 200 is the same, that is, the number of the fingerprint identification units 20 in the second direction Y in each fingerprint identification unit group 200 is the same, and the number of columns of the fingerprint identification units 20 in each fingerprint identification unit group 200 is the same, that is, the number of the fingerprint identification units 20 in the first direction X in each fingerprint identification unit group 200 is the same, so that the number of the fingerprint identification units 20 in each fingerprint identification unit group is the same, and further, the optical touch accuracy of each fingerprint identification unit group 200 multiplexed as the optical touch unit 40 is the same, because the fingerprint identification unit groups 200 are uniformly arrayed on the display panel 000, the optical touch accuracy of the entire display panel 000 can be kept consistent, and the touch detection effect can be improved.

In some optional embodiments, please refer to fig. 3 and 4, fig. 3 is a schematic plane structure diagram of another display panel provided in the embodiments of the present invention, and fig. 4 is a simplified frame diagram of fig. 3, in this embodiment, the display panel 000 includes N1 rows of fingerprint identification unit groups 200 arranged along the second direction Y, the number of rows of fingerprint identification units 20 in the first row of fingerprint identification unit group 200H1 and the N1 row of fingerprint identification unit group 200HN1 is less than the number of rows of fingerprint identification units 20 in the remaining row of fingerprint identification unit groups, and the number of rows of fingerprint identification units 20 in the remaining row of fingerprint identification unit groups is equal, where N1 is greater than or equal to 2, and N1 is a positive integer.

The display panel 000 includes N2 rows of fingerprint identification unit groups arranged along the first direction X, the number of columns of fingerprint identification units 20 in the first row of fingerprint identification unit group 200L1 and the N2 th row of fingerprint identification unit group 200LN2 is smaller than the number of columns of fingerprint identification units 20 in the remaining rows of fingerprint identification units, the number of columns of fingerprint identification units 20 in the remaining rows of fingerprint identification units is equal, wherein N2 is not less than 2, and N2 is a positive integer.

The present embodiment further explains that the display panel 000 may be configured to include N1 rows of fingerprint identification cell groups 200 arranged in the second direction Y, the number of rows of fingerprint identification cells 20 in the first row of fingerprint identification cell groups 200H1 and N1 row of fingerprint identification cell groups 200HN1 being smaller than the number of rows of fingerprint identification cells 20 in the remaining row of fingerprint identification cell groups, the number of rows of fingerprint identification cells 20 in the remaining row of fingerprint identification cell groups being equal, wherein N1 is not less than 2 and N1 is a positive integer, i.e., in the second direction Y, the display panel 000 includes at least two rows of fingerprint identification cell groups respectively located at opposite side edge positions of the display panel 000 and being the first row of fingerprint identification cell groups 200H1 and N1 row of fingerprint identification cell groups 200HN1, wherein the number of rows of fingerprint identification cells 20 in the first row of fingerprint identification cell groups 200H1 and N1 row of fingerprint identification cell groups 200HN1 are each smaller than the number of rows of fingerprint identification cells 20 in the remaining row, n1 is the total number of rows of fingerprint identification cell groups 200 included in display panel 000. In this embodiment, the number of rows of the fingerprint identification units 20 in each row of the fingerprint identification unit group 200 at the opposite edge position in the second direction Y of the display panel 000 is designed to be relatively smaller, so that the touch precision at the edge position in the second direction Y of the display panel 000 can be improved, and further, the problem that the touch effect at the edge of the display panel is worse than that in a non-edge area in the related art can be solved. In addition, the display panel 000 of the embodiment further includes N2 rows of fingerprint identification unit groups arranged along the first direction X, the number of columns of fingerprint identification units 20 in the first row of fingerprint identification unit group 200L1 and the N2 th row of fingerprint identification unit group 200LN2 is smaller than the number of columns of fingerprint identification units 20 in the remaining rows of fingerprint identification units, and the number of columns of fingerprint identification units 20 in the remaining rows of fingerprint identification units is equal, wherein N2 is not less than 2, N2 is a positive integer, that is, along the first direction X, the display panel 000 at least includes two rows of fingerprint identification unit groups respectively located at opposite side edge positions of the display panel 000, and the two rows of fingerprint identification unit groups are respectively a first row of fingerprint identification unit group 200L1 and an N2 th row of fingerprint identification unit group 200LN2, wherein the number of fingerprint identification units 20 in the first row of fingerprint identification unit group 200L1 and the N2 th row of fingerprint identification unit group 200LN2 is smaller than the number of columns of fingerprint identification units 20 in the remaining rows, n2 is the total number of columns of the fingerprint identification unit set 200 included in the display panel 000.

In this embodiment, the number of columns of the fingerprint identification units 20 in each column of the fingerprint identification unit group 200 at the opposite edge position in the first direction X of the display panel 000 is designed to be relatively smaller, so that the touch precision at the edge position in the first direction X of the display panel 000 can be improved, the problem that the touch effect at the edge of the display panel is poor compared with that at a non-edge area in the related art can be solved, and the touch identification performance at the edge of the whole display panel can be improved.

For clearly illustrating the technical solution of the present embodiment, reference may be made to a simplified schematic diagram of a frame structure of each optical touch unit 40/fingerprint identification unit group 200 in fig. 4, where the number of fingerprint identification units in the optical touch unit 401 at the edge position of the whole display panel 000 (except the optical touch unit 402 at the vertex angle position) is smaller than the number of fingerprint identification units in the optical touch unit 403 at other positions, and especially the number of fingerprint identification units in the optical touch unit 402 at multiple vertex angle positions of the display panel 000 is smaller, so that different touch accuracies can be designed according to different sizes of edge contact areas between a touch subject and the display panel 000, and the touch effect is further improved.

It should be understood that fig. 3 of this embodiment only schematically illustrates the number of rows of fingerprint identification units 20 in the first row fingerprint identification unit group 200H1 and the N1 th row fingerprint identification unit group 200HN1 and the number of rows of fingerprint identification units 20 in the remaining row fingerprint identification units, but is not limited thereto, and in practical implementation, the number of rows may be designed according to actual requirements, and it is only necessary to satisfy that the number of rows of fingerprint identification units 20 in the first row fingerprint identification unit group 200H1 and the N1 th row fingerprint identification unit group 200HN1 are all smaller than the number of rows of fingerprint identification units 20 in the remaining row fingerprint identification units. Fig. 3 of the present embodiment only schematically illustrates the number of columns of fingerprint identification units 20 in the first row of fingerprint identification unit groups 200L1 and the N2 th row of fingerprint identification unit groups 200LN2 and the number of columns of fingerprint identification units 20 in the remaining rows of fingerprint identification units, but is not limited thereto, and in specific implementation, the number of columns may be designed according to actual requirements, and it is only necessary to satisfy that the number of columns of fingerprint identification units 20 in the first row of fingerprint identification unit groups 200L1 and the N2 th row of fingerprint identification unit groups 200LN2 are both smaller than the number of columns of fingerprint identification units 20 in the remaining rows of fingerprint identification units.

In some alternative embodiments, please refer to fig. 5 and 6, fig. 5 is a schematic plane structure diagram of another display panel provided by the embodiment of the present invention, fig. 6 is a simplified frame diagram of fig. 5, in the present embodiment, the number of rows of the fingerprint identification units 20 in the first row of fingerprint identification unit groups 200H1 and the N1 row of fingerprint identification unit groups 200HN1 is equal to half of the number of rows of the fingerprint identification units 20 in the remaining row of fingerprint identification unit groups; the number of columns of fingerprint identification elements 20 in the first 200L1 and N2 th 200LN2 sets is equal to half the number of columns of fingerprint identification elements 20 in the remaining sets.

The present embodiment further explains that the display panel 000 may be configured to include N1 rows of fingerprint identification cell groups 200 arranged in the second direction Y, the number of rows of fingerprint identification cells 20 in the first row of fingerprint identification cell groups 200H1 and N1 row of fingerprint identification cell groups 200HN1 being equal to half the number of rows of fingerprint identification cells 20 in the remaining row of fingerprint identification cell groups, the number of rows of fingerprint identification cells 20 in the remaining row of fingerprint identification cell groups being equal, wherein N1 is not less than 2 and N1 is a positive integer, i.e., in the second direction Y, the display panel 000 includes at least two rows of fingerprint identification cell groups located at opposite side edge positions of the display panel 000, respectively, and the number of rows of fingerprint identification cell groups 200HN1 in the first row of fingerprint identification cell groups 200H1 and N1 row of fingerprint identification cell groups 200HN1, wherein the number of rows of fingerprint identification cells 20 in the first row of fingerprint identification cell groups 200H1 and N1 row of fingerprint identification cell groups 200HN1 is equal to half the number of rows of fingerprint identification cells 20 in the remaining row of fingerprint identification cell groups, n1 is the total number of rows of fingerprint identification cell groups 200 included in display panel 000. In this embodiment, the number of rows of the fingerprint identification units 20 in each row of the fingerprint identification unit set 200 at the opposite edge position in the second direction Y of the display panel 000 is designed to be half of the number of the remaining rows, so that the touch precision at the edge position in the second direction Y of the display panel 000 can be further improved, and the problem that the touch effect at the edge of the display panel is worse than that in the non-edge area in the related art can be solved, and simultaneously, the design of the display panel 000 can be more uniform. Furthermore, the display panel 000 of the embodiment further includes N2 fingerprint identification cell groups arranged along the first direction X, the number of columns of fingerprint identification cells 20 in the first column of fingerprint identification cell group 200L1 and the N2 th column of fingerprint identification cell group 200LN2 is equal to half of the number of columns of fingerprint identification cells 20 in the remaining columns of fingerprint identification cell groups, and the number of columns of fingerprint identification cells 20 in the remaining columns of fingerprint identification cells is equal, wherein N2 is not less than 2, and N2 is a positive integer, that is, along the first direction X, the display panel 000 at least includes two columns of fingerprint identification cell groups respectively located at opposite side edge positions of the display panel 000, and the two columns of fingerprint identification cell groups are respectively the first column of fingerprint identification cell group 200L1 and the N2 th column of fingerprint identification cell group 200LN2, wherein the number of columns of fingerprint identification cells 20 in the first column of fingerprint identification cell group 200L1 and the N2 th column of fingerprint identification cell group 200LN2 is equal to half of the number of columns of fingerprint identification cells 20 in the remaining columns of fingerprint identification cell groups, n2 is the total number of columns of the fingerprint identification unit set 200 included in the display panel 000. In this embodiment, the number of the columns of the fingerprint identification units 20 in each column of the fingerprint identification unit group 200 at the opposite edge position in the first direction X of the display panel 000 is half of the number of the remaining columns, so that the touch accuracy at the edge position in the first direction X of the display panel 000 can be further improved, the problem that the touch effect at the edge of the display panel is worse than that in a non-edge area in the related art can be solved, and meanwhile, the design of the display panel 000 can be more uniform, which is beneficial to improving the touch identification performance at the edge of the whole display panel.

For clearly illustrating the technical solution of the present embodiment, reference may be made to a simplified schematic diagram of a frame structure of each optical touch unit 40/fingerprint identification unit group 200 in fig. 6, where the number of fingerprint identification units in the optical touch unit 401 at the edge position of the whole display panel 000 (except the optical touch unit 402 at the vertex angle position) is equal to half of the number of fingerprint identification units in the optical touch unit 403 at other positions, and especially the number of fingerprint identification units in the optical touch unit 402 at multiple vertex angle positions of the display panel 000 is smaller, so that different touch accuracies can be designed according to different sizes of the edge contact areas of the touch subject and the display panel 000, and the touch effect is further improved.

In some optional embodiments, please refer to fig. 5, fig. 6, fig. 7, and fig. 8 in combination, where fig. 7 is a schematic plane structure diagram of another display panel provided in an embodiment of the present invention (for clarity, the present embodiment performs transparency filling on the capacitive touch unit 50 in fig. 7), fig. 8 is a frame relationship diagram after final combination of optical touch and capacitive touch, in this embodiment, the display panel 000 further includes a plurality of capacitive touch units 50 arranged in an array, the capacitive touch units 50 include touch electrode blocks 501, and forward projection areas of the touch electrode blocks 501 to light-emitting surfaces of the display panel 000 are the same; optionally, the area of the forward projection of each touch electrode block 501 to the light exit surface of the display panel 000 is the same as the area of the optical touch unit 403 at the non-edge position of the display panel 000.

The plurality of capacitive touch units 50 are uniformly arrayed, that is, the plurality of capacitive touch units 50 arranged along the first direction X form a capacitive touch unit row 50H, and the plurality of capacitive touch unit rows 50H are arranged along the second direction Y; the plurality of capacitive touch units 50 arranged along the second direction Y form a capacitive touch unit column 50L, and the plurality of capacitive touch unit columns 50L are arranged along the first direction X; in a direction perpendicular to the light emitting surface of the display panel 000, each capacitive touch unit 50 overlaps or at least partially overlaps four adjacent fingerprint identification unit groups 200; among them, the four adjacent fingerprint identification cell groups 200 include a first fingerprint identification cell group 2001 and a second fingerprint identification cell group 2002 which are adjacent in the first direction X, and a third fingerprint identification cell group 2003 and a fourth fingerprint identification cell group 2004 which are adjacent in the first direction X, the first fingerprint identification cell group 2001 and the third fingerprint identification cell group 2003 being adjacent in the second direction Y, the second fingerprint identification cell group 2002 and the fourth fingerprint identification cell group 2004 being adjacent in the second direction Y.

This embodiment further illustrates that the display panel 000 may also include a capacitive touch mode, that is, the display panel 000 further includes a plurality of capacitive touch units 50 arranged in an array, the capacitive touch units 50 include touch electrode blocks 501, the forward projection area of each touch electrode block 501 to the light-emitting surface of the display panel 000 is the same, and in the actual design, considering that the touch control using the plurality of touch electrode blocks 501 arranged in an array is generally a capacitive touch control, therefore, the touch effect at the edge is inferior to that at the non-edge area, and generally, the touch electrode blocks 501 are used as a common electrode during displaying, considering that the consistency of the RC loading (RC loading) is affected by the large area difference among the touch electrode blocks, therefore, in the present embodiment, the forward projection area of each touch electrode block 501 toward the light exit surface of the display panel 000 is the same, and the touch electrode blocks 501 are uniformly arranged on the display panel 000 in an array.

Optionally, in order to solve the problem that the capacitive touch effect at the edge is worse than that at the non-edge area, the present embodiment combines optical touch with capacitive touch, specifically: the orthographic projection of at least one capacitive touch cell row 50H to the light-emitting surface of the display panel 000 covers the orthographic projection of the first row fingerprint identification unit group 200H1 or the N1 th row fingerprint identification unit group 200HN1 to the light-emitting surface of the display panel 000, and the orthographic projection of at least one capacitive touch cell column 50L to the light-emitting surface of the display panel 000 covers the orthographic projection of the first column fingerprint identification unit group 200L1 or the N2 th column fingerprint identification unit group 200LN2 to the light-emitting surface of the display panel 000; preferably, as shown in fig. 8, a certain capacitive touch cell row 50H is flush with a boundary e of the first row fingerprint identification cell group 200H1 on the side far from the N1 th row fingerprint identification cell group 200HN1, and a certain capacitive touch cell row 50H is flush with a boundary f of the N1 th row fingerprint identification cell group 200HN1 on the side far from the first row fingerprint identification cell group 200H 1; a certain capacitive touch control unit row 50L is flush with the boundary g of the first column fingerprint identification unit group 200L1 far from the side of the N2 column fingerprint identification unit group 200LN2, a certain capacitive touch control unit row 50L is flush with the boundary H of the N2 column fingerprint identification unit group 200LN2 far from the side of the first column fingerprint identification unit group 200L1, because the number of rows of fingerprint identification units 20 in the first row fingerprint identification unit group 200H1 and the N1 row fingerprint identification unit group 200HN1 is less than the number of rows of fingerprint identification units 20 in the rest row fingerprint identification unit groups, the number of columns of fingerprint identification units 20 in the first column fingerprint identification unit group 200L1 and the N2 column fingerprint identification unit group 200LN2 is less than the number of columns of fingerprint identification units 20 in the rest rows, and therefore, the forward projection of each row of capacitive touch control unit row 50H onto the display panel 000 can overlap with the forward projection of at least two different rows of fingerprint identification units onto the display panel 000, the orthographic projection of each capacitive touch unit row 50L to the display panel 000 can be overlapped with the orthographic projection of at least two fingerprint identification unit groups in different rows to the display panel 000, so that optical touch detection and capacitive touch detection can be combined, the touch position can be comprehensively detected, and the touch precision can be improved.

As shown in fig. 8, when the display panel 000 is in the touch detection phase, the number of rows of the fingerprint identification cells 20 in the first row of fingerprint identification cell group 200H1 and the N1 th row of fingerprint identification cell group 200HN1 is equal to half of the number of rows of the fingerprint identification cells 20 in the remaining row of fingerprint identification cell groups; the number of columns of the fingerprint identification units 20 in the first column of fingerprint identification unit group 200L1 and the N2 column of fingerprint identification unit group 200LN2 is equal to half of the number of columns of the fingerprint identification units 20 in the remaining column of fingerprint identification unit groups, so that the touch accuracy at the 000-edge position of the display panel can be further improved, the problem that the touch effect of the edge of the display panel is poor compared with that of a non-edge area in the related art can be solved, and the touch identification performance of the edge of the whole display panel can be improved. For capacitive touch, the touch precision of capacitive touch is the same as that of the optical touch unit 403 at a non-edge position in optical touch, and in general, the capacitive touch effect at the edge is worse than that at the middle. Since the optical touch and fingerprint identification functions do not need to be simultaneously provided, when fingerprint identification is not needed, the fingerprint identification unit 20 only performs optical touch detection, that is, the touch driving circuit 30 provides the same touch scanning signal to all the fingerprint scanning lines E of each row of the fingerprint identification unit group 200, so as to realize array driving of the fingerprint identification unit group 200, that is, to realize array driving of the optical touch unit 40, when the main body is touched on the display panel 000, the optical touch unit 40 senses a change in illumination to complete optical touch detection, and then transmits a result of touch position detection to the touch detection result receiving unit through the fingerprint signal line F, so as to determine a touch position and realize detection of the touch position. At this time, both optical touch detection and capacitive touch detection may be combined to comprehensively detect the touch position, thereby improving the touch performance, as shown in fig. 8, the identification Pitch of optical touch is (2B, 2A), where a represents the number of rows of fingerprint identification units in a row of fingerprint identification unit group 200H, B represents the number of columns of fingerprint identification units in a column of fingerprint identification unit group 200L, the identification Pitch of capacitive touch is (2B, 2A), and the Pitch of composite touch after synthesis is (B, a), so that it can be seen that the touch identification Pitch before recombination is 2 times that of the touch identification Pitch after recombination, that is, the touch accuracy after recombination can be improved by 2 times. For the capacitive touch of this embodiment, the area of each touch electrode block 501 can be increased to 4 times that of the design of (B, a) using the original touch identification Pitch, so that the number of touch channels can be halved, the amount of signals corresponding to each touch electrode block 501 is correspondingly increased greatly, and the touch performance is greatly improved. In addition, the optical touch control and the capacitive touch control in the touch detection stage of the embodiment have different touch control realization principles, have complementary functions in performance and have stronger anti-interference capability. When fingerprint identification is needed, according to the touch position of the touch main body detected by the touch position, the fingerprint identification driving circuit 10 only needs to provide a fingerprint identification scanning signal for the fingerprint identification unit 20 at the touch position, only the fingerprint identification unit 20 at the touch position is opened to carry out fingerprint identification, and finally the fingerprint identification unit 20 at the touch position transmits a fingerprint identification detection result to the fingerprint detection result receiving unit through a fingerprint signal line F corresponding to the touch position, so that fingerprint information detection is realized. Therefore, when the fingerprint is identified in this embodiment, the fingerprint identification driving circuit 10 only needs to scan and drive the fingerprint identification unit 20 at the touch position, so that the fingerprint scanning time can be greatly saved.

In some optional embodiments, referring to fig. 9, fig. 9 is a schematic plan view of another display panel according to an embodiment of the present invention (for clearly illustrating the technical solution of the present embodiment, transparency filling is performed on the capacitive touch unit 50 in fig. 9), in the present embodiment, the display panel 000 includes a plurality of sub-pixels 60 arranged in an array, one capacitive touch unit 50 is correspondingly provided with a plurality of sub-pixels 60, each sub-pixel 60 at least includes a thin film transistor 601, a pixel electrode 602 (not filled in fig. 9), and a common electrode 603, and the common electrode 603 is multiplexed as a touch electrode block 501.

Optionally, the display panel of this embodiment may include a plurality of sub-pixels 60 arranged in an array, and may further include a plurality of scan lines G arranged along the second direction Y and extending along the first direction X, a plurality of data lines S arranged along the first direction X and extending along the second direction Y, and both the scan lines G and the data lines S are electrically connected to the sub-pixels 60, so that in the display stage, the sub-pixels 60 on the display panel 000 complete the display operation by providing the display driving voltage signals to the sub-pixels 60 through the scan lines G and the data lines S. The scanning lines G and the data lines S intersect to define a region where the sub-pixels 60 are located, that is, the sub-pixels 60 are arranged in an array, the sub-pixels 60 in the same row are electrically connected to the same scanning line G, and can be electrically connected to each scanning line G through a scanning driving circuit (not shown), so that the same scanning line G provides a display driving scanning signal to the sub-pixels 60 in the same row, and the source driving chip (not shown) provides a display data signal to the data lines S, thereby completing the display operation. The common electrode 603 of this embodiment is reused as the touch electrode block 501, the common electrode layer of the general display panel 000 is disposed as a whole layer, when the common electrode is reused as the touch electrode block 501, the whole common electrode layer needs to be cut and then set into a plurality of touch electrode blocks 501 arranged in an array, and one capacitor touch unit 50 is correspondingly provided with a plurality of sub-pixels 60, thereby being beneficial to reducing the film thickness of the whole display panel.

In some optional embodiments, please refer to fig. 10 and 11, fig. 10 is a schematic diagram illustrating an equivalent circuit connection structure of a display panel according to an embodiment of the present invention, fig. 11 is a partial enlarged view of a driving circuit portion of fig. 10, in this embodiment, a touch driving circuit 30 includes a plurality of sequentially cascaded touch driving units T _ VSR, each touch driving unit T _ VSR is electrically connected to a plurality of fingerprint scanning lines E of an optical touch unit 40 in a same row; the touch driving circuit 30 includes a touch start signal input terminal T _ STV; the fingerprint identification driving circuit 10 comprises a plurality of fingerprint identification driving unit groups 101, each fingerprint identification driving unit group 101 comprises a fingerprint identification starting signal input end STV, and each fingerprint identification driving unit group 101 comprises a plurality of fingerprint identification driving units VSR which are sequentially cascaded; the output end of each fingerprint identification driving unit VSR is electrically connected with a fingerprint scanning line E; a fingerprint identification driving unit group 101 drives N rows of fingerprint identification units 20, and the N rows of fingerprint identification units 20 correspond to one touch driving unit T _ VSR; wherein N is an integer greater than or equal to 2.

The present embodiment further explains a circuit connection structure of the touch driving circuit 30 and the fingerprint identification driving circuit 10, in which the touch driving circuit 30 includes a plurality of sequentially cascaded touch driving units T _ VSR, which are T _ VSR1, T _ VSR2, T _ VSR3, … …, T _ VSR (n), where n is the total number of rows of the fingerprint identification unit group 200/optical touch unit 40 included in the display panel 000, and each touch driving unit T _ VSR is electrically connected to a plurality of fingerprint scanning lines E of the same row of the optical touch unit 40; the first-stage touch driving unit T _ VSR1 of the touch driving circuit 30 is connected to a touch start signal input terminal T _ STV.

The fingerprint identification driving circuit 10 comprises a plurality of fingerprint identification driving unit groups 101, each fingerprint identification driving unit group 101 comprises a fingerprint identification starting signal input end STV, each fingerprint identification driving unit group 101 comprises a plurality of fingerprint identification driving units VSR which are sequentially connected in series, namely VSR11, VSR12, … … and VSR (1a) are a first group of fingerprint identification driving unit groups 1011, and the starting signal is STV 1; VSR21, VSR22, … …, VSR (2a) is the second set of fingerprint identification drive cell group 1012, start signal STV 2; similarly, VSR (n1), VSR (n2), …, VSR (na), is the nth fingerprint identification driving unit group 101n, and the start signal is stv (n), where a is the number of rows of fingerprint identification units included in each row of optical touch units 40, and optionally, the sum of physical distances of the a fingerprint identification units 20 along the arrangement direction of the fingerprint identification driving units VSR is equal to the size of one finger. The outputs of each driving unit VSR are electrically connected to a scanning line E, the outputs of the first driving unit group 1011 are FGout1, FGout1, … … and FGouta, the outputs of the second driving unit group 1012 are FGout (a +1), FGout (a +2), … … and FGout (2a), and the outputs of the … … nth driving unit group 101n are FGout ((n-1) a +1), FGout ((n-1) a +2), … … and FGout (na). The output end of each touch driving unit T _ VSR is electrically connected to all the fingerprint scanning lines E in the same row of optical touch units 40/the same row of fingerprint identification unit group 200, the output end corresponding to T _ VSR1 is TGout1, the output end corresponding to T _ VSR2 is TGout2, … …, and the output end corresponding to T _ VSR (n) is TGout (n). One fingerprint identification driving unit group 101 drives N rows (N ═ a) of fingerprint identification units 20, and the N rows of fingerprint identification units 20 correspond to one touch driving unit T _ VSR; wherein N is an integer greater than or equal to 2.

The fingerprint identification driving circuit 10 and the touch control driving circuit 30 of the present embodiment are designed by different driving units of a cascade structure, and only the VSR circuits need to be grouped and designed into driving circuits having both the fingerprint identification function and the optical touch control function. When fingerprint identification is not needed, the design can be compatible with a touch function. In the related art, the fingerprint driving circuit and the touch driving circuit are two independent circuits, so that a large load is applied to the panel, and the display and touch or fingerprint signals are greatly interfered or attenuated. The touch driving circuit is not required to be additionally designed, the design cost is reduced, and meanwhile, the extra touch driving circuit is subtracted, so that the load of the display panel is favorably reduced, the interference between signals of display and touch or fingerprints is avoided, and the touch and fingerprint identification effects of the display panel are favorably improved.

In operation, referring to fig. 12-14, fig. 12 is a schematic diagram of an equivalent circuit connection structure of another display panel according to an embodiment of the present invention, fig. 13 is a partially enlarged view of a driving circuit portion of fig. 12, and fig. 14 is a schematic diagram of a clock selection unit 700 in fig. 12. Optionally, the clock selecting circuit 70 includes a plurality of clock selecting units 700, each clock selecting unit 700 includes a first input terminal in1, a second input terminal in2, a selecting output terminal out, and a clock signal input terminal CKV, the selecting output terminal out is connected to the fingerprint scanning line E, the first input terminal in1 is electrically connected to the output terminal FGout of the fingerprint identification driving circuit 10, and the second input terminal in2 is electrically connected to the output terminal TGout of the touch driving circuit 30. Optionally, each clock selecting unit 700 further includes an N-type switching transistor 701 and a P-type switching transistor 702, the gate of the N-type switching transistor 701 and the gate of the P-type switching transistor 702 are both connected to the clock signal input terminal CKV, the source of the N-type switching transistor 701 is connected to the output terminal FGout of the fingerprint identification driving circuit 10, the source of the P-type switching transistor 702 is connected to the output terminal TGout of the touch driving circuit 30, and the drain of the N-type switching transistor 701 and the drain of the P-type switching transistor 702 are both connected to the selection output terminal out. At this time, when the same signal is fed to the clock signal input terminal CKV, the connection between the fingerprint scan line E and the first input terminal in1 or between the fingerprint scan line E and the second input terminal in2 can be realized, when the fingerprint scan line E is connected to the first input terminal in1, the signal at the output terminal FGout of the fingerprint identification driving circuit 10 is connected to the fingerprint scan line E through the selection output terminal out to transmit the fingerprint driving scan signal, and when the fingerprint scan line E is connected to the second input terminal in2, the output terminal TGout of the touch driving circuit 30 is connected to the fingerprint scan line E to transmit the touch driving scan signal.

It should be noted that, this embodiment only schematically illustrates an optional structure of the clock selection unit 700, but is not limited to this structure, and the clock selection unit 700 may also be designed as an N-type switching transistor, a P-type switching transistor, or other circuit structures, and in specific implementation, the clock selection unit 700 may be designed according to actual requirements.

In some optional embodiments, please refer to fig. 15 and 16, fig. 15 is a schematic diagram of an equivalent circuit connection structure of another display panel according to an embodiment of the present invention, fig. 16 is a partially enlarged view of a demultiplexing circuit portion of fig. 15, in this embodiment, the display panel 000 further includes a demultiplexing circuit 80, the demultiplexing circuit 80 includes a plurality of demultiplexing units 801, and each demultiplexing unit 801 is electrically connected to a plurality of fingerprint signal lines F of the same row of optical touch units 40.

Optionally, the multiplexing unit 801 includes a plurality of signal input terminals 8011, a plurality of signal output terminals 8012, a plurality of first switching transistors 8013, and a plurality of control signal lines CKH; the number of the signal output ends 8012 is smaller than that of the signal input ends 8011, and the signal input ends 8011 are electrically connected with the fingerprint signal lines F in a one-to-one correspondence manner; the control signal line CKH is electrically connected to the control terminal of the first switching transistor 8013, the first terminal of the first switching transistor 8013 is electrically connected to the signal output terminal 8012, and the second terminal of the first switching transistor 8013 is electrically connected to the signal input terminal 8011; the number of the control signal lines CKH is the same as the number of the fingerprint signal lines in a row of the optical touch units 40.

The embodiment further explains that the display panel 000 further includes a demultiplexing circuit 80, and the demultiplexing circuit 80 includes a plurality of demultiplexing units 801, which are MUX1, MUX2, … …, and MUX (m), where m is the total number of columns of the optical touch units 40 included in the display panel 000, and each demultiplexing unit 801 is electrically connected to a plurality of fingerprint signal lines F of the same column of optical touch units 40, that is, the signal input end 8011 of each demultiplexing unit 801 is electrically connected to the fingerprint signal lines F of the same column of optical touch units 40 in a one-to-one correspondence manner. The number of the control signal lines CKH is the same as the number of the fingerprint signal lines F in one row of the optical touch units 40, that is, the control signal lines CKH are CKH1, CKH2, CKH3, … …, and CKH (b), where b is the number of the fingerprint signal lines F included in one row of the optical touch units 40, that is, the number of rows of the fingerprint identification units 20 included in one row of the optical touch units 40, and optionally, the sum of physical distances of the b fingerprint identification units 20 along the arrangement direction of the multi-path allocation unit 801 is equal to the size of one finger.

Referring to fig. 17 and 18, fig. 17 is a timing diagram of the input signals of the control signal lines CKH in fig. 15 and 16 during the optical touch phase, fig. 18 is a timing diagram of the input signals of the control signal lines CKH in fig. 15 and 16 during the fingerprint recognition phase, when the display panel 000 is in the touch detection phase, the demultiplexing unit 801 simultaneously sends all the control signal lines CKH to high level within 1 scan period (1 frame time/1 frame) (as shown in fig. 17), the first switching transistor 8013 corresponding to each demultiplexing unit 801 simultaneously turns on and receives the touch signal of the corresponding optical touch unit 40, at this time, the output signal of the signal output terminal Vout1 of the first demultiplexing unit MUX1 is F1+ F2+ … + F (b), the output signal of the signal output terminal 2 of the second demultiplexing unit MUX2 is F (b +1) + F (b +2) + … + F (2b) … … + … … and so on, the output signal of the signal output terminal vout (m) of the mth demultiplexing unit mux (m) is F ((m-1) b +1) + F ((m-1) b +2) + … + F (mb), where F1 represents the output signal of the first fingerprint signal line, F2 represents the output signal of the second fingerprint signal line, and so on, mb represents that the display panel 000 includes m × b fingerprint signal lines in total, and F (mb) represents the output signal of the m × b fingerprint signal line, where the accuracy of the identification depends on the sum of the physical distances of the fingerprint identification units included in each demultiplexing unit in the direction of the arrangement of the demultiplexing units, and generally reaches a millimeter level, and the touch position of the touch subject can be located by the output signal of the signal output terminal of each demultiplexing unit. When the display panel 000 is in the fingerprint identification stage, the multiple-way distribution unit 801 controls the signal line CKH to sequentially supply high level (as shown in fig. 18) in1 scanning period (1 frame time/1 frame), the first switching transistor 8013 corresponding to each multiple-way distribution unit 801 sequentially turns on and receives the detection signal of the fingerprint identification unit 20 corresponding to the touch position, and at this time, since only the fingerprint identification driving circuit 10 corresponding to the touch position is in the scanning operation state, that is, only the fingerprint identification unit 20 corresponding to the touch position performs the fingerprint detection operation, only the multiple-way distribution unit 801 corresponding to the touch position outputs the fingerprint detection signal, the identification accuracy depends on the physical distance between two adjacent fingerprint identification units 20 along the arrangement direction of the multiple-way distribution unit, and is generally in the micrometer level, the fingerprint detection result receiving unit receives the output signal of the signal output terminal of the multiple-way distribution unit corresponding to the touch position, a fingerprint detection function can be implemented.

This embodiment is in the fingerprint identification stage, only open the fingerprint identification drive circuit in the touch position region, can practice thrift fingerprint scanning time by a wide margin, in addition, multichannel distribution circuit 80's setting can also reduce the channel number of fingerprint identification signal receiving element (for example driver chip) by a wide margin, thereby be favorable to reducing the frame space of walking the display panel that the line occupy, be favorable to realizing narrow frame, can also avoid causing the risk of short circuit because of the fingerprint signal line F who is connected with driver chip is too much easily, and then under the condition that driver chip adopted the same channel number and the same scanning time, this embodiment can design bigger fingerprint identification region, can also set up more fingerprint identification unit 20, thereby be favorable to realizing comprehensive screen fingerprint identification function, can also improve the fingerprint identification effect.

It should be noted that, in fig. 15 and 16 of this embodiment, the multi-path distribution circuit 80 is designed at the bottom frame portion of the whole display panel, and in the actual design, the edge routing space is considered, and the multi-path distribution circuit can be staggered in a cross manner, and the multi-path distribution circuit is divided into the top frame portion and the bottom frame portion of the display panel, and the implementation principle and the implementation method are similar to those of the embodiment, and are not described again.

In some optional embodiments, please refer to fig. 1 and fig. 19 in combination, where fig. 19 is a flowchart of a driving method of a display panel according to an embodiment of the present invention, the driving method provided in this embodiment is used for driving the display panel 000 shown in fig. 1 to implement the fingerprint identification and touch functions; the driving method comprises the following steps: an optical touch stage 001 and a fingerprint identification stage 002.

In the optical touch stage 001, the touch driving circuit 30 provides a touch scanning signal to each fingerprint identification unit 20 through the fingerprint scanning line E, when the touch subject touches the display panel 000, the optical touch unit 40 senses a change in illumination, and the external driving circuit (which may be a driving chip) receives an optical detection signal of the optical touch unit 40 through the fingerprint signal line F to determine a touch position, thereby implementing optical touch detection.

In the fingerprint identification stage 002, the fingerprint identification driving circuit 10 only provides the fingerprint identification scanning signal to the fingerprint identification unit 20 at the touch position, and the fingerprint identification unit 20 at the touch position transmits the fingerprint detection signal to the external driving circuit (which may be a driving chip) through the fingerprint signal line F, so as to realize the fingerprint information detection.

The driving method of the display panel 000 of the present embodiment is applied to the display panel 000 shown in fig. 1, the display panel 000 is used by multiplexing one fingerprint identification unit group 200 into one optical touch unit 40, the plurality of fingerprint identification unit groups 200 are arranged in a uniform array, and one fingerprint identification unit group 200 includes a plurality of fingerprint identification units 20 arranged in a uniform array. In the optical touch stage 001, the touch driving circuit 30 provides the same touch scanning signal to all the fingerprint scanning lines E of each row of the fingerprint identification unit group 200 to realize the array driving of the fingerprint identification unit group 200, that is, the array driving of the optical touch unit 40 is realized, when the touch subject touches the display panel 000, the optical touch unit 40 senses the illumination change to complete the optical touch detection, and then the result of the touch position detection is transmitted to the touch detection result receiving unit through the fingerprint signal line F, so that the touch position can be determined, and the touch position detection is realized. In the fingerprint identification stage 002, the fingerprint identification driving circuit 10 only needs to provide a fingerprint identification scanning signal to the fingerprint identification unit 20 at the touch position, only the fingerprint identification unit 20 at the touch position is turned on to perform fingerprint identification, and the fingerprint driving circuit 10 can enter a standby state without performing scanning operation on the fingerprint identification units 20 corresponding to the other positions, so that power consumption can be saved; finally, the fingerprint identification unit 20 at the touch position transmits the result of fingerprint identification detection to the fingerprint detection result receiving unit through the fingerprint signal line F corresponding to the touch position, so as to realize fingerprint information detection. Therefore, when the fingerprint is identified in this embodiment, the fingerprint identification driving circuit 10 only needs to scan and drive the fingerprint identification unit 20 at the touch position, so that the fingerprint scanning time can be greatly saved, and the power consumption can be also saved.

In some optional embodiments, please refer to fig. 10-18 and fig. 20 in combination, where fig. 20 is a flowchart of another driving method for a display panel according to an embodiment of the present invention, the driving method provided in this embodiment is used for driving the display panel 000 shown in fig. 15 to implement the fingerprint identification and touch functions; the display panel 000 of the present embodiment further includes:

the touch driving circuit 30 includes a plurality of sequentially cascaded touch driving units T _ VSR, each touch driving unit T _ VSR is electrically connected to a plurality of fingerprint scanning lines E of the optical touch units 40 in the same row; the touch driving circuit 30 includes a touch start signal input terminal T _ STV; the fingerprint identification driving circuit 10 comprises a plurality of fingerprint identification driving unit groups 101, each fingerprint identification driving unit group 101 comprises a fingerprint identification starting signal input end STV, and each fingerprint identification driving unit group 101 comprises a plurality of fingerprint identification driving units VSR which are sequentially cascaded; the output end of each fingerprint identification driving unit VSR is electrically connected with a fingerprint scanning line E; one fingerprint identification driving unit group 101 drives N rows of fingerprint identification units 20, and the N rows of fingerprint identification units 20 correspond to one touch driving unit T _ VSR; wherein N is an integer greater than or equal to 2.

The display panel 000 of the present embodiment further includes a multiplexing circuit 80, the multiplexing circuit 80 includes a plurality of multiplexing units 801, and each multiplexing unit 801 is electrically connected to a plurality of fingerprint signal lines F of the same row of optical touch units 40. Optionally, the multiplexing unit 801 includes a plurality of signal input terminals 8011, a plurality of signal output terminals 8012, a plurality of first switching transistors 8013, and a plurality of control signal lines CKH; the number of the signal output ends 8012 is smaller than that of the signal input ends 8011, and the signal input ends 8011 are electrically connected with the fingerprint signal lines F in a one-to-one correspondence manner; a control signal line CKH is electrically connected to a control terminal of the first switching transistor 8013, a first electrode of the first switching transistor 8013 is electrically connected to the signal output terminal 8012, and a second electrode of the first switching transistor 8013 is electrically connected to the signal input terminal 8011; the number of the control signal lines CKH is the same as the number of the fingerprint signal lines in one row of the optical touch units 40.

The display panel 000 of the embodiment further includes a clock selection circuit 70, and optionally, the clock selection circuit 70 includes a plurality of clock selection units 700, each of the clock selection units 700 includes a first input terminal in1, a second input terminal in2, a selection output terminal out, and a clock signal input terminal CKV, the selection output terminal out is connected to the fingerprint scan line E, the first input terminal in1 is electrically connected to the output terminal FGout of the fingerprint identification driving circuit 10, and the second input terminal in2 is electrically connected to the output terminal TGout of the touch driving circuit 30.

The driving method comprises the following steps:

in the optical touch stage 001, the clock signal input terminal CKV of each clock selection unit 700 is controlled to be a first voltage signal, so that the touch driving circuit 30 is an effective output circuit, the second input terminal in2 of the clock selection unit 700 is conducted with the touch driving unit T _ VSR of the touch driving circuit 30, at this time, the touch start signal input terminal T _ STV of the touch driving circuit 30 feeds the touch start signal, each touch driving unit T _ VSR sequentially provides the scanning signal to each row of the optical touch units 40, when the touch subject touches the display panel 000, the optical touch units 40 at the touch position sense the illumination change, and the external driving circuit (which may be a driving chip) receives the optical detection signal transmitted by the fingerprint signal line through each multi-path distribution unit 801 to determine the touch position, thereby implementing the optical touch detection.

In the fingerprint identification stage 002, the clock signal input terminal CKV of each clock selecting unit 700 is controlled to be a second voltage signal, so that the fingerprint identification driving circuit 10 is an effective output circuit, the first input terminal in1 of the clock selecting unit 700 is conducted with the fingerprint identification driving unit VSR of the fingerprint identification driving circuit 10, at this time, the fingerprint identification driving unit group 200 corresponding to the optical touch unit 40 where the touch position is located is an effective fingerprint identification driving unit group, the fingerprint identification start signal input terminal STV of the effective fingerprint identification driving unit group gives a fingerprint start signal, and the fingerprint identification driving units of the effective fingerprint identification driving unit group sequentially provide fingerprint identification scanning signals for each row of fingerprint identification units 20; the multi-path allocation unit 801 corresponding to the optical touch unit 40 where the touch position is located is an effective multi-path allocation unit, and the external driving circuit (which may be a driving chip) receives the fingerprint detection signal transmitted by the fingerprint signal line F through the effective multi-path allocation unit, so as to detect the fingerprint information of the touch position.

Specifically, referring to fig. 15 and 21-24, fig. 21 is a simplified frame diagram of fig. 15, fig. 22 is a timing diagram of input signals of the display panel of fig. 21 at an optical touch stage, fig. 23 is a timing diagram of input signals of the display panel of fig. 21 at a fingerprint identification stage, and fig. 24 is a timing diagram of another input signals of the display panel of fig. 21 at a fingerprint identification stage.

As shown in fig. 15 and fig. 21, the structure of the display panel 000 can refer to the explanation of the corresponding embodiment in fig. 15, which is not repeated herein. When the display panel 000 is in the optical touch stage, i.e. only the touch position of the touch object needs to be detected, the timing sequence of the relevant input signals is shown in fig. 22, and for convenience of understanding, the control signals and the shift signals of some of the fingerprint identification driving units VSR are omitted from the input signal timing sequence of fig. 22. Wherein, the clock signal input terminal CKV of each clock selection unit 700 is a first voltage signal, which can be a low voltage 0, that is, CKV is equal to 0, at this time, the P-type switch transistor 702 of the clock selection unit 700 is turned on, the N-type switch transistor 701 is turned off, the second input terminal in2 of the clock selection unit 700 is turned on with the touch driving unit T _ VSR of the touch driving circuit 30, the touch driving circuit 30 is an effective output circuit, the touch start signal input terminal T _ STV of the touch driving circuit 30 is fed with the touch start signal, the output terminal TGout corresponding to each touch driving unit T _ VSR respectively transmits the output touch scan signal to each fingerprint signal line E through the P-type switch transistor 702 of the clock selection unit 700, the touch scan signals of the fingerprint signal lines E of each row of the optical touch units 40 are simultaneously fed, that is, each touch driving unit T _ VSR sequentially provides a scanning signal to each row of the optical touch units 40; at this time, the control signal lines CKH of the demultiplexing circuit 80 are simultaneously set to a high level, the first switching transistor 8013 corresponding to each demultiplexing unit 801 is simultaneously turned on and receives the touch signal of the corresponding optical touch unit 40, when the touch subject touches the display panel 000, the optical touch unit 40 at the touch position senses the illumination change, and the external driving circuit (which may be a driving chip) receives the optical detection signal transmitted by the fingerprint signal line through each demultiplexing unit 801 to determine the touch position, thereby implementing the optical touch detection. Optionally, since the clock signal input terminal CKV of each clock selecting unit 700 is the first voltage signal, the fingerprint identification driving circuit is in an inactive state, so that each fingerprint identification driving unit, such as VSR11, VSR12 … VSR (1a), VSR21, VSR22 … VSR (2a), … …, VSR (n1), VSR (n2) … VSR (na), is in a Disable (Disable) state, and each fingerprint identification start signal input terminal, such as STV1, STV2 … STV (n), does not apply a control signal (even if a signal is applied, the signal output at the output terminal TGout of the touch driving unit T _ VSR is not affected), thereby saving power consumption.

When fingerprint identification is required, entering a fingerprint identification stage, when a finger is at a position K in fig. 21, timing of related input signals is as shown in fig. 23, and through touch scanning performed when a clock signal input terminal CKV of each clock selection unit 700 in the optical touch stage is 0, the driving chip positions the finger to a position (T _ VSR2, MUX1), at this time, the control display panel 000 enters the fingerprint identification stage, the clock signal input terminal CKV of each clock selection unit 700 is a second voltage signal, which may be at a high potential of 1, that is, CKV is 1, at this time, the N-type switching transistor 701 of the clock selection unit 700 is turned on, the P-type switching transistor 702 is turned off, the first input terminal in1 of the clock selection unit 700 is turned on with the fingerprint identification driving unit VSR of the fingerprint identification driving circuit 10, the fingerprint identification driving circuit 10 is an effective output circuit, and since the finger is located at the position K, therefore, only the fingerprint identification driving units VSR21 through VSR2a of the second group of fingerprint identification driving unit group 1012 are turned on, and the input signals at the respective fingerprint identification start signal input terminals are: STV2 is 1, STV1 is STV3 is svt 4 is svt (n) is 0, the second group of fingerprint identification driving unit 1012 sequentially provides fingerprint identification scanning signals to each row of fingerprint identification units in the second row of optical touch units 40, at this time, each control signal line CKH of the multi-path distribution unit 801 sequentially provides high level, the first switching transistor 8013 corresponding to each multi-path distribution unit 801 sequentially turns on and receives the detection signal of the fingerprint identification unit 20 corresponding to the touch position, at this time, because only the fingerprint identification driving circuit 10 corresponding to the touch position is in the scanning operation state, that is, only the fingerprint identification unit 20 corresponding to the touch position performs fingerprint detection operation, only the multi-path distribution unit 801 (i.e., the multi-path distribution unit 1) corresponding to the touch position has a fingerprint detection signal output, the driving chip passes through the received output signal of the signal output end of the multi-path distribution unit corresponding to the touch position, and realizing the fingerprint detection function. Optionally, since the clock signal input terminal CKV of each clock selecting unit 700 is the second voltage signal, the touch driving circuit is in an inactive state, and each touch driving unit, such as T _ VSR1 and T _ VSR2 … T _ VSR (n), is in a Disable (Disable) state, and the touch start signal input terminal T _ STV does not apply a control signal (even if a signal is applied, the output signals of the output terminals FGout (a +1), FGout (a +2), …, and FGout (2a) of the second group of fingerprint identification driving unit group 1012 are not affected); and since only the fingerprint recognition unit 20 at the position of the finger K needs to be driven, that is, only the fingerprint recognition driving units VSR21 through VSR2a of the second group of fingerprint recognition driving unit groups 1012 need to be turned on, and the remaining fingerprint recognition driving unit groups do not need to be driven, the scanning time can be saved and the power consumption can be saved.

In view of the random finger position, according to the design of the present embodiment, different finger positions may need to drive the fingerprint identification driving units at different positions to enter the fingerprint identification scanning operation. Therefore, when the finger is at the H position in fig. 21, the timing of the input signals is as shown in fig. 24, the driving chip positions the finger to the positions (T _ VSR1, MUX2), (T _ VSR2, MUX2), (T _ VSR1, MUX3), (T _ VSR2, and MUX3) by the touch scan performed when the clock signal input terminal CKV of each clock selecting unit 700 is 0 in the optical touch phase, and at this time, the display panel 000 is controlled to enter the fingerprint identification phase, the clock signal input terminal CKV of each clock selecting unit 700 is the second voltage signal, which may be at high potential 1, that is, CKV is 1, when the N-type switch transistor 701 of the clock selecting unit 700 is turned on, the P-type switch transistor 702 is turned off, the first input terminal in1 of the clock selecting unit 700 is turned on with the fingerprint identification driving unit VSR of the fingerprint identification driving circuit 10, the fingerprint identification driving circuit 10 is an effective output circuit, and since the finger is at the H position, therefore, only the fingerprint identification driving units VSR11 through VSR1a of the first group of fingerprint identification driving unit group 1011 and the fingerprint identification driving units VSR21 through VSR2a of the second group of fingerprint identification driving unit group 1012 are turned on, and the input signals at the respective fingerprint identification start signal input terminals are: STV1, STV2, STV4, STV …, svt (n), 0, the first set of driving unit 1011 and the second set of driving unit 1012 sequentially provide a scanning signal for fingerprint identification to each of the fingerprint identification units in the first and second rows of optical touch units 40, at this time, the control signal lines CKH of the multi-channel distributing unit 801 sequentially provide a high level, the first switching transistor 8013 corresponding to each multi-channel distributing unit 801 sequentially turns on and receives the detection signal of the fingerprint identification unit 20 corresponding to the touch position, at this time, since only the fingerprint identification driving circuit 10 corresponding to the touch position is in the scanning operation state, that is, only the fingerprint identification unit 20 corresponding to the touch position performs the fingerprint detection operation, only the multi-channel distributing unit 801 corresponding to the touch position (i.e., the multi-channel distributing units MUX2 and MUX3) has the fingerprint detection signal output, the driving chip outputs the received output signal of the signal output terminal of the multi-channel distributing unit corresponding to the touch position, and realizing the fingerprint detection function. Optionally, since the clock signal input terminal CKV of each clock selecting unit 700 is the second voltage signal, the touch driving circuit is in an inactive state, and each touch driving unit, such as T _ VSR1 and T _ VSR2 … T _ VSR (n), is in a Disable (Disable) state, and the touch start signal input terminal T _ STV does not apply a control signal (even if a signal is applied, the output signals of the output terminals FGout1, FGout1, … …, FGouta of the first group of fingerprint identification driving unit group 1011 and the output terminals FGout (a +1), FGout (a +2), …, FGout (2a) of the second group of fingerprint identification driving unit group 1012 are not affected); and since only the fingerprint recognition unit 20 at the position of the finger H needs to be driven, that is, only the fingerprint recognition driving units VSR11 through VSR1a of the first group of fingerprint recognition driving unit group 1011 and the fingerprint recognition driving units VSR21 through VSR2a of the second group of fingerprint recognition driving unit group 1012 need to be turned on, and the remaining groups of fingerprint recognition driving unit groups do not drive, the scanning time and the power consumption can be saved. It is understood that no matter where the finger is located, the scanning timing sequence is similar to the above embodiments, and is not described in detail here. If the number of groups to be driven by the fingerprint identification driving unit group is increased, the corresponding scanning time is also greatly increased, and how many groups of fingerprint identification driving unit groups are opened in practical application is related to the number of rows a of fingerprint identification units included in each row of the optical touch unit 40.

In some optional embodiments, please refer to fig. 5-8 and fig. 25 in combination, where fig. 25 is a flowchart of another driving method for a display panel according to an embodiment of the present invention, the driving method provided in this embodiment is used for driving the display panel 000 shown in fig. 7 to implement the functions of fingerprint identification, optical touch, and capacitive touch; the driving method of the display panel 000 of the present embodiment further includes: the capacitive touch stage 003 has a working time overlapping with that of the optical touch stage 001.

The display panel 000 of the present embodiment further includes N1 rows of fingerprint identification cell groups 200 arranged along the second direction Y, the number of rows of fingerprint identification cells 20 in the first row of fingerprint identification cell group 200H1 and the N1 th row of fingerprint identification cell group 200HN1 is less than the number of rows of fingerprint identification cells 20 in the remaining row of fingerprint identification cell groups, and the number of rows of fingerprint identification cells 20 in the remaining row of fingerprint identification cell groups is equal, wherein N1 is not less than 2, and N1 is a positive integer; the display panel 000 includes N2 rows of fingerprint identification unit groups arranged along the first direction X, the number of columns of fingerprint identification units 20 in the first row of fingerprint identification unit group 200L1 and the N2 th row of fingerprint identification unit group 200LN2 is smaller than the number of columns of fingerprint identification units 20 in the remaining rows of fingerprint identification units, the number of columns of fingerprint identification units 20 in the remaining rows of fingerprint identification units is equal, wherein N2 is not less than 2, and N2 is a positive integer. Preferably, the number of rows of fingerprint identification cells 20 within the first and N1 rows of fingerprint identification cell groups 200H1, 200HN1 is equal to half the number of rows of fingerprint identification cells 20 within the remaining row of fingerprint identification cell groups; the number of columns of fingerprint identification elements 20 in the first 200L1 and N2 th 200LN2 sets is equal to half the number of columns of fingerprint identification elements 20 in the remaining sets.

The display panel 000 of the present embodiment further includes a plurality of capacitive touch units 50 arranged in an array, the capacitive touch units 50 include touch electrode blocks 501, and the forward projection areas of the touch electrode blocks 501 toward the light exit surface of the display panel 000 are the same; optionally, the area of the forward projection of each touch electrode block 501 to the light exit surface of the display panel 000 is the same as the area of the optical touch unit 403 at the non-edge position of the display panel 000. The plurality of capacitive touch units 50 are uniformly arranged in an array, that is, the plurality of capacitive touch units 50 arranged along the first direction X form a capacitive touch unit row 50H, and the plurality of capacitive touch unit rows 50H are arranged along the second direction Y; the plurality of capacitive touch units 50 arranged along the second direction Y form a capacitive touch unit column 50L, and the plurality of capacitive touch unit columns 50L are arranged along the first direction X; the orthographic projection of at least one capacitive touch cell row 50H to the light-emitting surface of the display panel 000 covers the orthographic projection of the fingerprint identification unit group 200H1 in the first row or the fingerprint identification unit group 200HN1 in the N1 to the light-emitting surface of the display panel 000; the orthographic projection of at least one capacitive touch unit row 50L to the light-emitting surface of the display panel 000 covers the orthographic projection of the first row of fingerprint identification unit group 200L1 or the N2 th row of fingerprint identification unit group 200LN2 to the light-emitting surface of the display panel 000; in a direction perpendicular to the light emitting surface of the display panel 000, each capacitive touch unit 50 overlaps or at least partially overlaps four adjacent fingerprint identification unit groups 200; wherein the four adjacent fingerprint identification cell groups 200 include a first fingerprint identification cell group 2001 and a second fingerprint identification cell group 2002 which are adjacent in the first direction X, and a third fingerprint identification cell group 2003 and a fourth fingerprint identification cell group 2004 which are adjacent in the first direction X, the first fingerprint identification cell group 2001 and the third fingerprint identification cell group 2003 being adjacently disposed in the second direction Y, the second fingerprint identification cell group 2002 and the fourth fingerprint identification cell group 2004 being adjacently disposed in the second direction Y.

In the driving method of the display panel 000 of this embodiment, in the capacitive touch stage 003, the external driving circuit provides a common voltage to the touch electrode blocks 501 of the touch unit 50 through the fingerprint signal lines F, when the touch subject touches the display panel 000, a detection capacitance is formed between the touch subject and the touch electrode blocks 501, which causes a value change of the detection capacitance, and the external driving circuit receives a detection signal of the detection capacitance through the fingerprint signal lines F, determines a touch position, and implements capacitive touch detection.

The structure of the display panel 000 in this embodiment can refer to the explanation of the corresponding embodiments in fig. 5 to 8, which is not repeated herein. In the driving method of the display panel 000 according to this embodiment, the optical touch detection and the capacitive touch detection are combined to comprehensively detect the touch position, so as to improve the touch performance, as shown in fig. 8, the identification Pitch of the optical touch is (2B, 2A), where a represents the number of rows of fingerprint identification units in a row of fingerprint identification unit group 200H, B represents the number of columns of fingerprint identification units in a column of fingerprint identification unit group 200L, the identification Pitch of the capacitive touch is (2B, 2A), and the Pitch of the combined touch after synthesis is (B, a), so that the identification Pitch of the touch before combination is 2 times that of the combined touch, that is, the touch precision after combination can be improved by 2 times. For the capacitive touch of this embodiment, the area of each touch electrode block 501 can be increased to 4 times that of the design of (B, a) using the original touch identification Pitch, so that the number of touch channels can be halved, the amount of signals corresponding to each touch electrode block 501 is correspondingly increased greatly, and the touch performance is greatly improved. In addition, the optical touch control and the capacitive touch control in the touch detection stage of the embodiment have different touch control realization principles, have complementary functions in performance and have stronger anti-interference capability.

In some alternative embodiments, please refer to fig. 26, where fig. 26 is a schematic structural diagram of a display device according to an embodiment of the present invention, and the display device 111 according to this embodiment includes the display panel 000 according to the above embodiment of the present invention. The embodiment of fig. 26 only takes a mobile phone as an example to describe the display device 111, and it should be understood that the display device 111 provided in the embodiment of the present invention may be another display device 111 having a display function, such as a computer, a television, and a vehicle-mounted display device, and the present invention is not limited thereto. The display device 111 provided in the embodiment of the present invention has the beneficial effects of the display panel 000 provided in the embodiment of the present invention, and specific reference may be made to the specific description of the display panel 000 in the above embodiments, which is not described herein again.

As can be seen from the above embodiments, the display panel, the driving method thereof, and the display device provided by the present invention at least achieve the following advantages:

according to the display panel, one fingerprint identification unit group is multiplexed into one optical touch unit for use, the plurality of fingerprint identification unit groups are uniformly arranged in an array mode, and one fingerprint identification unit group comprises a plurality of fingerprint identification units which are uniformly arranged in an array mode. In the optical touch stage, the touch driving circuit provides the same touch scanning signals for all the fingerprint scanning lines of each row of fingerprint identification unit groups to realize the array driving of the fingerprint identification unit groups, namely the array driving of the optical touch units is realized. In the fingerprint identification stage, the fingerprint identification driving circuit only needs to provide a fingerprint identification scanning signal for the fingerprint identification unit at the touch position, only the fingerprint identification unit at the touch position is opened for fingerprint identification work, and the fingerprint driving circuit can not perform scanning work on the fingerprint identification units corresponding to other positions and enters a standby state, so that the power consumption can be saved; and finally, the fingerprint identification unit at the touch position transmits the result of fingerprint identification detection to the fingerprint detection result receiving unit through a fingerprint signal line corresponding to the touch position, so that fingerprint information detection is realized. When the fingerprint identification is carried out, the fingerprint identification driving circuit only needs to scan and drive the fingerprint identification unit at the touch position, so that the fingerprint scanning time can be greatly saved, and meanwhile, the power consumption can be saved. The fingerprint identification and touch control functions are integrated, the fingerprint identification structure can be compatible with the touch control function, a touch control circuit is not required to be additionally designed, the design cost is reduced, and in addition, the load of the display panel is reduced due to the fact that the additional touch control circuit part is reduced. According to the display panel, the touch function is realized without a method of additionally cutting and multiplexing the common electrode into the touch electrode, so that the screen splitting risk caused by the impedance difference of the touch wiring is effectively avoided, and the display quality of the display panel can be improved.

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A display panel, comprising: the fingerprint identification driving circuit comprises a fingerprint identification driving circuit, a plurality of fingerprint scanning lines which are arranged along a second direction and extend along a first direction, a plurality of fingerprint signal lines which are arranged along the first direction and extend along a second direction, and a plurality of fingerprint identification units which are arranged in an array manner, wherein the fingerprint scanning lines and the fingerprint signal lines are crossed and insulated to define areas where the plurality of fingerprint identification units are located, the fingerprint identification units in the same row are electrically connected with the same fingerprint scanning line, and the fingerprint identification units in the same column are electrically connected with the same fingerprint signal line; wherein the first direction intersects the second direction; the fingerprint identification driving circuit drives the fingerprint identification unit to detect fingerprint information;

the display panel comprises a plurality of fingerprint identification unit groups arranged in an array, and one fingerprint identification unit group comprises a plurality of fingerprint identification units arranged in an array;

the touch control device further comprises a touch control driving circuit and a plurality of optical touch control units arranged in an array, wherein the touch control driving circuit drives the optical touch control units to detect touch positions; one fingerprint identification unit group is multiplexed into one optical touch control unit;

the fingerprint identification driving circuit and the touch control driving circuit are electrically connected with the fingerprint scanning line.

2. The display panel according to claim 1, wherein the number of rows of the fingerprint identification units in each of the fingerprint identification unit groups is the same; the number of columns of the fingerprint identification units in each fingerprint identification unit group is the same.

3. The display panel according to claim 1,

the display panel comprises N1 lines of fingerprint identification unit groups arranged along the second direction, the line number of the fingerprint identification units in the fingerprint identification unit group in the first line and the line number of the fingerprint identification units in the fingerprint identification unit group in the N1 are smaller than the line number of the fingerprint identification units in the fingerprint identification unit groups in the rest lines, and the line numbers of the fingerprint identification units in the fingerprint identification unit groups in the rest lines are equal, wherein N1 is more than or equal to 2, and N1 is a positive integer;

the display panel comprises N2 rows of fingerprint identification unit groups arranged along the first direction, the number of the fingerprint identification units in the first row of fingerprint identification unit groups and the N2 row of fingerprint identification unit groups is smaller than the number of the fingerprint identification units in the rest rows of fingerprint identification unit groups, the number of the fingerprint identification units in the rest rows of fingerprint identification unit groups is equal, wherein N2 is not less than 2, and N2 is a positive integer.

4. The display panel according to claim 3,

the number of rows of the fingerprint identification elements in the first and N1 th rows of the fingerprint identification element groups is equal to half the number of rows of the fingerprint identification elements in the remaining rows of the fingerprint identification element groups;

the number of columns of fingerprint identification elements in the first and N2 th columns of fingerprint identification element groups is equal to half the number of columns of fingerprint identification elements in the remaining columns of fingerprint identification element groups.

5. The display panel according to claim 3,

the display panel also comprises a plurality of capacitive touch units which are arranged in an array, each capacitive touch unit comprises touch electrode blocks, and the forward projection areas of the touch electrode blocks to the light-emitting surface of the display panel are the same;

the plurality of capacitive touch units arranged along the first direction form a capacitive touch unit row, and the plurality of capacitive touch unit rows are arranged along the second direction; the plurality of capacitive touch units arranged along the second direction form a capacitive touch unit column, and the plurality of capacitive touch unit columns are arranged along the first direction;

in a direction perpendicular to the light emitting surface of the display panel, each capacitive touch unit is overlapped with four adjacent fingerprint identification unit groups; the fingerprint identification unit groups are adjacent in the first direction, the first fingerprint identification unit group and the third fingerprint identification unit group are adjacent in the second direction, and the second fingerprint identification unit group and the fourth fingerprint identification unit group are adjacent in the second direction.

6. The display panel according to claim 5, wherein an orthographic projection of at least one of the capacitive touch cell rows onto the light emitting surface of the display panel covers an orthographic projection of the fingerprint identification cell group of the first row or the fingerprint identification cell group of the Nth 1 row onto the light emitting surface of the display panel, a certain capacitive touch cell row is flush with a boundary of the fingerprint identification cell group of the first row on a side away from the fingerprint identification cell group of the Nth 1 row, and a certain capacitive touch cell row is flush with a boundary of the fingerprint identification cell group of the Nth 1 row on a side away from the fingerprint identification cell group of the first row;

at least one electric capacity touch-control unit is listed as to the orthographic projection of display panel light-emitting surface covers first row fingerprint identification unit group or N2 row fingerprint identification unit group is listed as to the orthographic projection of display panel light-emitting surface, and certain electric capacity touch-control unit is listed as with first row the boundary that fingerprint identification unit group kept away from N2 row fingerprint identification unit group one side flushes, and certain electric capacity touch-control unit is listed as with N2 row the boundary that fingerprint identification unit group kept away from first row fingerprint identification unit group one side flushes.

7. The display panel according to claim 5, wherein the display panel comprises a plurality of sub-pixels arranged in an array, one capacitive touch unit is correspondingly provided with a plurality of sub-pixels, each sub-pixel at least comprises a thin film transistor, a pixel electrode and a common electrode, and the common electrode is multiplexed as the touch electrode block.

8. The display panel according to claim 1,

the touch control driving circuit comprises a plurality of sequentially cascaded touch control driving units, and each touch control driving unit is electrically connected with a plurality of fingerprint scanning lines of the optical touch control units in the same row; the touch control driving circuit comprises a touch control initial signal input end;

the fingerprint identification driving circuit comprises a plurality of fingerprint identification driving unit groups, each fingerprint identification driving unit group comprises a fingerprint identification initial signal input end, and each fingerprint identification driving unit group comprises a plurality of fingerprint identification driving units which are sequentially cascaded; the output end of each fingerprint identification driving unit is electrically connected with one fingerprint scanning line;

one fingerprint identification driving unit group drives N rows of fingerprint identification units, and the N rows of fingerprint identification units correspond to one touch control driving unit; wherein N is an integer greater than or equal to 2.

9. The display panel according to claim 8, further comprising a multiplexing circuit, wherein the multiplexing circuit comprises a plurality of multiplexing units, and each multiplexing unit is electrically connected to a plurality of fingerprint signal lines of the same column of optical touch units.

10. The display panel according to claim 9,

the multi-path distribution unit comprises a plurality of signal input ends, a plurality of signal output ends, a plurality of first switching transistors and a plurality of control signal lines; wherein the content of the first and second substances,

the number of the signal output ends is smaller than that of the signal input ends, and the signal input ends are electrically connected with the fingerprint signal lines in a one-to-one correspondence manner;

the control signal line is electrically connected with the control end of the first switching transistor, the first electrode of the first switching transistor is electrically connected with the signal output end, and the second electrode of the first switching transistor is electrically connected with the signal input end;

the number of the control signal lines is the same as the number of the fingerprint signal lines in one row of the optical touch units.

11. The display panel according to claim 1, wherein the display panel further comprises a clock selection circuit, the clock selection circuit comprises a plurality of clock selection units, each clock selection unit comprises a first input terminal, a second input terminal, a selection output terminal, and a clock signal input terminal, the selection output terminal is connected to the fingerprint scanning line, the first input terminal is electrically connected to the output terminal of the fingerprint identification driving circuit, and the second input terminal is electrically connected to the output terminal of the touch driving circuit.

12. The display panel according to claim 1, wherein the fingerprint identification unit comprises a second switching transistor, a photodiode, and a first capacitor, a control terminal of the second switching transistor is electrically connected to the fingerprint scanning line, a source of the second switching transistor is electrically connected to a first electrode of the photodiode and a first electrode of the first capacitor, respectively, and a drain of the second switching transistor is electrically connected to the fingerprint signal line; and the second pole of the photodiode and the second pole of the first capacitor are both electrically connected with a ground signal.

13. A driving method of a display panel, characterized in that the driving method is used for the display panel of claim 1;

the driving method includes: an optical touch stage and a fingerprint identification stage;

in the optical touch stage, the touch driving circuit provides a touch scanning signal to each fingerprint identification unit through the fingerprint scanning line, when a touch main body touches the display panel, the optical touch units sense illumination change, and an external driving circuit receives an optical detection signal of the optical touch units through the fingerprint signal line, determines a touch position and realizes optical touch detection;

in the fingerprint identification stage, the fingerprint identification drive circuit to the touch position the fingerprint identification unit provides fingerprint identification scanning signal, the touch position the fingerprint identification unit passes through fingerprint signal line transmission fingerprint detection signal extremely external drive circuit realizes fingerprint information detection.

14. The driving method according to claim 13, wherein the display panel further comprises:

one fingerprint identification driving unit group drives N rows of fingerprint identification units, and the N rows of fingerprint identification units correspond to one touch control driving unit; wherein N is an integer greater than or equal to 2; the optical touch control device further comprises a multi-path distribution circuit, wherein the multi-path distribution circuit comprises a plurality of multi-path distribution units, and each multi-path distribution unit is electrically connected with the fingerprint signal lines of the optical touch control units in the same row;

the multi-path distribution unit comprises a plurality of signal input ends, a plurality of signal output ends, a plurality of first switching transistors and a plurality of control signal lines; wherein, the first and the second end of the pipe are connected with each other,

the number of the signal output ends is less than that of the signal input ends, and the signal input ends are electrically connected with the fingerprint signal lines in a one-to-one correspondence manner;

the number of the control signal lines is the same as the number of the fingerprint signal lines in one row of the optical touch units;

the fingerprint identification driving circuit comprises a fingerprint identification driving circuit and a clock selection circuit, wherein the fingerprint identification driving circuit comprises a fingerprint identification driving circuit, a touch control driving circuit and a touch control driving circuit, the touch control driving circuit comprises a touch control driving circuit, and the touch control driving circuit comprises a touch control driving circuit, a touch control driving circuit and a touch control driving circuit, and is characterized by further comprising a clock selection circuit, wherein the clock selection circuit comprises a plurality of clock selection units, each clock selection unit comprises a first input end, a second input end, a selection output end and a clock signal input end, the selection output end is connected with the fingerprint scanning line, the first input end is electrically connected with the output end of the fingerprint identification driving circuit, and the second input end is electrically connected with the output end of the touch control driving circuit;

the driving method includes:

in the optical touch stage, controlling the clock signal input end of each clock selection unit to be a first voltage signal, so that the touch drive circuit is an effective output circuit, the second input end of the clock selection unit is conducted with the touch drive unit of the touch drive circuit, at this time, the touch start signal input end of the touch drive circuit feeds a touch start signal, each touch drive unit sequentially provides a scanning signal for each row of optical touch units, when a touch main body touches the display panel, the optical touch units at a touch position sense illumination changes, and the external drive circuit receives optical detection signals transmitted by the fingerprint signal lines through each multi-path distribution unit, determines the touch position, and realizes optical touch detection;

in the fingerprint identification stage, controlling the clock signal input end of each clock selection unit to be a second voltage signal, so that the fingerprint identification driving circuit is an effective output circuit, the first input end of the clock selection unit is conducted with the fingerprint identification driving unit of the fingerprint identification driving circuit, at this time, the fingerprint identification driving unit group corresponding to the optical touch control unit where the touch position is located is an effective fingerprint identification driving unit group, the fingerprint identification starting signal input end of the effective fingerprint identification driving unit group gives a fingerprint starting signal, and the fingerprint identification driving unit of the effective fingerprint identification driving unit group sequentially provides a fingerprint identification scanning signal for each row of fingerprint identification units; the multi-path distribution unit corresponding to the optical touch unit where the touch position is located is an effective multi-path distribution unit, and the external driving circuit receives the fingerprint detection signal transmitted by the fingerprint signal line through the effective multi-path distribution unit to realize fingerprint information detection of the touch position.

15. The driving method according to claim 14, further comprising a capacitive touch phase, wherein the working time of the capacitive touch phase overlaps with the working time of the optical touch phase;

the display panel comprises N1 lines of the fingerprint identification unit groups which are arranged along the second direction, the line number of the fingerprint identification units in the fingerprint identification unit group in the first line and the fingerprint identification unit group in the N1 line is less than the line number of the fingerprint identification units in the fingerprint identification unit groups in the other lines, the line number of the fingerprint identification units in the fingerprint identification unit groups in the other lines is equal, wherein N1 is more than or equal to 2, and N1 is a positive integer;

the display panel comprises N2 rows of fingerprint identification unit groups arranged along the first direction, the number of the fingerprint identification units in the first row of fingerprint identification unit groups and the N2 row of fingerprint identification unit groups is smaller than the number of the fingerprint identification units in the rest rows of fingerprint identification unit groups, the number of the fingerprint identification units in the rest rows of fingerprint identification unit groups is equal, wherein N2 is not less than 2, and N2 is a positive integer;

the display panel also comprises a plurality of capacitive touch units which are arranged in an array manner, each capacitive touch unit comprises touch electrode blocks, and the forward projection areas of the touch electrode blocks to the light-emitting surface of the display panel are the same;

the orthographic projection of at least one capacitive touch unit row to the light-emitting surface of the display panel covers the orthographic projection of the fingerprint identification unit group in the first row or the orthographic projection of the fingerprint identification unit group in the Nth 1 row to the light-emitting surface of the display panel;

the orthographic projection of at least one capacitive touch unit column to the light-emitting surface of the display panel covers the orthographic projection of the fingerprint identification unit group in the first column or the orthographic projection of the fingerprint identification unit group in the Nth 2 column to the light-emitting surface of the display panel;

in a direction perpendicular to the light emitting surface of the display panel, each capacitive touch unit is overlapped with four adjacent fingerprint identification unit groups; wherein the four adjacent fingerprint identification cell groups include a first fingerprint identification cell group and a second fingerprint identification cell group adjacent in the first direction, and a third fingerprint identification cell group and a fourth fingerprint identification cell group adjacent in the first direction, the first fingerprint identification cell group and the third fingerprint identification cell group being adjacently arranged in the second direction, the second fingerprint identification cell group and the fourth fingerprint identification cell group being adjacently arranged in the second direction;

in the capacitance touch control stage, the external drive circuit provides a common voltage for the touch electrode blocks of the touch unit through the fingerprint signal lines, when the touch main body touches the display panel, a detection capacitor is formed between the touch main body and the touch electrode blocks to cause the value change of the detection capacitor, and the external drive circuit receives the detection signal of the detection capacitor through the fingerprint signal lines to determine the touch position and realize capacitance touch control detection.

16. A display device characterized by comprising the display panel according to any one of claims 1 to 12.