CN111160287A

CN111160287A - Display panel, fingerprint identification method thereof and display device

Info

Publication number: CN111160287A
Application number: CN201911413323.2A
Authority: CN
Inventors: 吴加铅; 黄敏
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: 2020-05-15
Anticipated expiration: 2039-12-31
Also published as: CN111160287B

Abstract

The embodiment of the invention provides a display panel, a fingerprint identification method thereof and a display device, wherein when the maximum number of fingerprint identification areas covered by a contact area of a finger and the display panel in the row direction is K, every adjacent K rows of fingerprint identification areas in the display panel along the row direction are electrically connected with each fingerprint signal reading line electrically connected with each row of fingerprint identification units in each row of fingerprint identification areas respectively and electrically connected with different multi-way selector circuits; fingerprint signal reading lines electrically connected with the different columns of fingerprint identification units in each fingerprint identification area are electrically connected with different multiplexer circuits; the multi-path selector circuit is used for controlling the conduction of a plurality of fingerprint signal reading lines electrically connected with the multi-path selector circuit and the fingerprint identification driving chip in a time-sharing manner; wherein K is more than or equal to 2. The embodiment of the invention has higher fingerprint identification efficiency and fingerprint identification accuracy.

Description

Display panel, fingerprint identification method thereof and display device

Technical Field

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

Background

Fingerprints are a pronoun for biometric identification due to their lifelong invariance, uniqueness and convenience. In particular, in the display device, functions such as unlocking and payment of the display device can be realized by performing fingerprint recognition on a user.

At present, a display panel with a full-screen fingerprint identification function comprises fingerprint identification units arranged in an array, the fingerprint identification units in the same row share a fingerprint identification scanning line, and the fingerprint identification units in the same column share a fingerprint signal reading line. When carrying out fingerprint identification, each line fingerprint identification unit of line-by-line drive to in fingerprint identification signal transmission to fingerprint identification driver chip with fingerprint identification unit output by fingerprint signal reading line, so that fingerprint identification driver chip can obtain the fingerprint identification image according to the fingerprint identification signal of each fingerprint identification unit output, and match this fingerprint identification image with the fingerprint image of prestoring, and when matching successfully, carry out corresponding fingerprint identification function.

However, since the display panel with the full-screen fingerprint identification function or the large-area fingerprint identification function includes multiple rows and multiple columns of fingerprint identification units, and a finger can only cover one contact area of the display panel, if the fingerprint identification is performed, the fingerprint identification units are driven line by line, the fingerprint identification efficiency is low; and need set up more signal pin among the fingerprint identification driver chip to the fingerprint identification signal of fingerprint identification unit output of receiving each row for display panel has higher cost.

Disclosure of Invention

The embodiment of the invention provides a display panel, a fingerprint identification method thereof and a display device, which are used for improving fingerprint identification efficiency and fingerprint identification accuracy.

In a first aspect, an embodiment of the present invention provides a display panel, including: a display area and a non-display area surrounding the display area;

the display area comprises a plurality of fingerprint identification areas arranged in an array; each fingerprint identification area is provided with M rows and N columns of fingerprint identification units;

the display area also comprises a plurality of fingerprint signal reading lines; the fingerprint identification units positioned in the same column are electrically connected with the same fingerprint signal reading line;

the non-display area includes a plurality of multiplexer circuits; in each adjacent K rows of the fingerprint identification areas along the row direction, the fingerprint signal reading lines electrically connected with the fingerprint identification units in each row of the fingerprint identification areas are respectively and electrically connected with different multiplexer circuits; the fingerprint signal reading lines electrically connected with the fingerprint identification units in different columns of each fingerprint identification area are electrically connected with different multiplexer circuits; the multi-path selector circuit is used for controlling the conduction of a plurality of fingerprint signal reading lines electrically connected with the multi-path selector circuit and a fingerprint identification driving chip in a time-sharing manner;

wherein M and N are positive integers; k is equal to the maximum number of fingerprint identification areas covered by the contact area of the finger and the display panel in the row direction; wherein K is more than or equal to 2.

In a second aspect, an embodiment of the present invention provides a fingerprint identification method, where, with the display panel, the fingerprint identification method includes:

determining the position of a contact area of a finger and the display panel;

and controlling the multiplexer circuit to conduct the fingerprint signal reading lines electrically connected with the fingerprint identification units corresponding to the fingerprint identification areas in the contact area with the fingerprint identification driving chip, and acquiring at least two rows of fingerprint identification signals output by the fingerprint identification units in the fingerprint identification areas in the contact area so as to acquire a fingerprint image.

In a third aspect, an embodiment of the present invention further provides a display device, which includes the display panel, and the display panel performs fingerprint identification by using the fingerprint identification method.

According to the display panel, the fingerprint identification method and the display device provided by the embodiment of the invention, a plurality of fingerprint identification units arranged in an array mode and arranged in a display area are divided into a plurality of fingerprint identification areas, so that the contact area of a finger and the display panel covers K fingerprint identification areas at most in the row direction, and K is more than or equal to 2; each fingerprint identification area can comprise M rows and N columns of fingerprint identification units, all the fingerprint identification units positioned in the same column can share one fingerprint signal reading line, the fingerprint signal reading line is electrically connected with a fingerprint identification driving chip through a multiplexer arranged in the non-display area, and the multiplexer can control the conduction of the fingerprint signal reading line electrically connected with the multiplexer and the fingerprint identification driving chip in a time-sharing manner; through making every adjacent K in the row fingerprint identification region, each fingerprint signal that each row fingerprint identification unit electricity of each row fingerprint identification region connects reads the line and is connected with different multiplexer circuit electricity respectively for each fingerprint identification signal that each row fingerprint identification unit output does not influence each other in the fingerprint identification region of this K row, in order when carrying out fingerprint identification, can read the fingerprint identification signal that the fingerprint identification unit output that is located the regional fingerprint identification of the at least K fingerprint identification of same row simultaneously, thereby improve fingerprint identification's efficiency, and improve fingerprint identification's the degree of accuracy.

Drawings

FIG. 1 is a schematic diagram of a display panel with fingerprint recognition function in the prior art;

fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention;

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

FIG. 4 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

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

FIG. 6 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

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

FIG. 8 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

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

FIG. 10 is a flow chart of a fingerprint identification method according to an embodiment of the present invention;

FIG. 11 is a flow chart of a method of determining a location of a contact region provided by an embodiment of the present invention;

FIG. 12 is a flow chart of yet another method for determining the location of a contact region provided by an embodiment of the present invention;

fig. 13 is a schematic structural diagram of a display device according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Fig. 1 is a schematic structural diagram of a display panel with a fingerprint identification function in the prior art. As shown in fig. 1, in the prior art, the display panel 001 having a full-screen fingerprint identification function or a large-area fingerprint identification function includes a plurality of fingerprint identification units 01 arranged in an array, the fingerprint identification units 01 located in the same column share a fingerprint signal reading line 03, and a fingerprint identification signal output by the fingerprint identification unit 01 can be transmitted to a fingerprint identification driving chip 050 through the fingerprint signal reading line 03, so that the fingerprint identification driving chip can perform fingerprint identification according to the fingerprint identification signal transmitted by each fingerprint identification unit. The fingerprint identification units 01 arranged in an array can be divided into a plurality of fingerprint identification areas 0101, and the area of each fingerprint identification area 0101 is equivalent to the area covered by the contact area 0102 of the contact surface of the finger and the display panel; wherein, for reducing the quantity of signal pin in fingerprint identification driver chip 050, the non-display area 020 of display panel 001 is provided with the multiplexer circuit, each multiplexer circuit includes a plurality of switching element, each fingerprint signal that reads the line 03 with the different row fingerprint identification unit 01 electricity of same fingerprint identification region 0101 is connected with the switching element electricity of different multiplexer, and each fingerprint signal that reads the line with the different row fingerprint identification unit 01 electricity of fingerprint identification region 0101 is connected with each switching element electricity of same multiplexer circuit.

For example, the display panel includes 3 rows and 3 columns of fingerprint identification areas 0101, and each fingerprint identification area 0101 includes 6 rows and 6 columns of fingerprint identification units. At this time, the non-display area of the display panel 001 includes 6 multiplexer circuits for fingerprint recognition, i.e., a first multiplexer circuit, a second multiplexer circuit, a third multiplexer circuit, a fourth multiplexer circuit, a fifth multiplexer circuit, and a sixth multiplexer circuit. Wherein the first multiplexer circuit comprises 3 first transistors M1, the second multiplexer circuit comprises 3 second transistors M2, and the third multiplexer circuit comprises 3 third transistors M3; the fourth multiplexer circuit includes 3 fourth transistors M4, the fifth multiplexer circuit includes 3 fifth transistors M5, and the sixth multiplexer circuit includes 3 sixth transistors M6; each first transistor M1 is electrically connected to each fingerprint signal readout line 03 connected to the first row of fingerprint identification cells 01 in the same row of each fingerprint identification region 0101 in a one-to-one correspondence manner; each second transistor M2 is electrically connected to each fingerprint signal readout line 03 connected to the second row of fingerprint identification cells 01 in each fingerprint identification area 0101 in the same row in a one-to-one correspondence manner; each third transistor M3 is electrically connected to each fingerprint signal readout line 03 connected to the third row of fingerprint identification units 01 in the same row of each fingerprint identification area 0101 in a one-to-one correspondence manner; each fourth transistor M4 is electrically connected to each fingerprint signal readout line 03 connected to the fourth row of fingerprint identification cells 01 in the same row of each fingerprint identification region 0101 in a one-to-one correspondence manner; each fifth transistor M5 is electrically connected to each fingerprint signal readout line 03 connected to the fifth row of fingerprint identification cells 01 in the same row of each fingerprint identification region 0101 in a one-to-one correspondence manner; each sixth transistor M6 is electrically connected to each fingerprint signal readout line 03 connected to the sixth row of fingerprint identification cells 01 in each fingerprint identification area 0101 in the same row in a one-to-one correspondence manner; and the transistors connected to the fingerprint signal reading lines electrically connected to the fingerprint identification units 01 in the same row in the fingerprint identification region 0101 may share one clock signal line, and the transistors in the same multiplexer circuit are electrically connected to the same signal pin of the fingerprint identification driving chip 050.

In this way, although the number of signal pins of the fingerprint identification driving chip 050 can be reduced, when performing fingerprint identification, the fingerprint identification driving chip 050 can only acquire the fingerprint identification signals output by the fingerprint identification units 01 of one fingerprint identification region 0101 at a time, and the fingerprint identification efficiency is low; and when the fingerprint is just pressed equally in the middle of the 4 fingerprint identification regions 0101, one fingerprint identification region has only 1/4 effective fingerprint information, and the fingerprint identification driving chip 050 can only acquire the fingerprint identification signals of the fingerprint identification units 01 of one fingerprint identification region 0101 at a time, so that 3/4 fingerprint information is lost, the fingerprint identification accuracy is low, and the false judgment is caused, and the fingerprint identification effect is influenced.

To solve the above technical problem, an embodiment of the present invention provides a display panel, which includes a display area and a non-display area surrounding the display area; the display area comprises a plurality of fingerprint identification areas arranged in an array; each fingerprint identification area is provided with M rows and N columns of fingerprint identification units; the display area also comprises a plurality of fingerprint signal reading lines; the fingerprint identification units positioned in the same column are electrically connected with the same fingerprint signal reading line; the non-display area includes a plurality of multiplexer circuits; in each K adjacent rows of fingerprint identification areas along the row direction, all fingerprint signal reading lines electrically connected with all rows of fingerprint identification units in all rows of fingerprint identification areas are respectively and electrically connected with different multi-way selector circuits; fingerprint signal reading lines electrically connected with the different columns of fingerprint identification units in each fingerprint identification area are electrically connected with different multiplexer circuits; the multi-channel selector circuit is used for controlling the conduction of a plurality of fingerprint signal reading lines electrically connected with the multi-channel selector circuit and the fingerprint identification driving chip in a time-sharing manner; wherein M and N are positive integers; k is equal to the maximum number of fingerprint identification areas covered by the contact area of the finger and the display panel in the row direction; wherein K is more than or equal to 2.

By adopting the technical scheme, the fingerprint identification units arranged in the array and arranged in the display area are subdivided into more fingerprint identification areas, so that the contact area of a finger and the display panel covers K fingerprint identification areas at most in the row direction, and K is more than or equal to 2; each fingerprint identification area can comprise M rows and N columns of fingerprint identification units, all the fingerprint identification units positioned in the same column can share one fingerprint signal reading line, the fingerprint signal reading line is electrically connected with a fingerprint identification driving chip through a multiplexer arranged in the non-display area, and the multiplexer can control the conduction of the fingerprint signal reading line electrically connected with the multiplexer and the fingerprint identification driving chip in a time-sharing manner; through making every adjacent K in the row fingerprint identification region, each fingerprint signal that each row fingerprint identification unit electricity of each row fingerprint identification region is connected reads the line and is connected with different multiplexer circuit electricity respectively for each fingerprint identification signal that each row fingerprint identification unit output does not influence each other in the fingerprint identification region of this K row, in order when carrying out fingerprint identification, can read the fingerprint identification signal that the fingerprint identification unit output that is located the regional fingerprint identification of the at least K fingerprint identification of same row simultaneously, thereby improve fingerprint identification's efficiency, and improve fingerprint identification's the degree of accuracy.

The above is the core idea of the present invention, and based on the embodiments of the present invention, a person skilled in the art can obtain all other embodiments without creative efforts, which belong to the protection scope of the present invention. The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

It should be noted that the display panel provided in the embodiment of the present invention may be a display panel with a full-screen fingerprint identification function, or a display panel with a large-area fingerprint identification function, which is not specifically limited in the embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the present invention. As shown in fig. 2, a plurality of fingerprint identification units 10 arranged in an array are disposed in a display area 110 of a display panel 100, and the plurality of fingerprint identification units 10 arranged in an array can be disposed in a non-open area of the display area 110 of the display panel 100, so as to not affect the display panel 100 to display a corresponding picture on the premise of implementing a full-screen fingerprint identification function; the plurality of fingerprint identification units 10 arranged in an array may be divided into a plurality of fingerprint identification areas 101 arranged in an array, and each fingerprint identification area 101 may include M rows and N columns of fingerprint identification units 10; when a finger is in contact with the display panel 100 and fingerprint recognition is to be performed, the maximum number of fingerprint recognition areas 101 that can be covered by the contact area of the finger with the display panel 100 in the row direction may be K, where M, N is a positive integer and K is equal to or greater than 2. Meanwhile, the display area 110 of the display panel 100 is further provided with a plurality of fingerprint signal reading lines 30, and the fingerprint identification units 10 in the same column share one fingerprint signal reading line 30; the fingerprint signal area line 30 can transmit a fingerprint recognition signal output from the fingerprint recognition unit 10.

A plurality of multiplexer circuits 40 are disposed in a non-display area 120 surrounding a display area 110 in the display panel 100; in the row direction X, the fingerprint signal reading lines 30 electrically connected to the fingerprint identification units 10 of different columns of each fingerprint identification area 101 are electrically connected to different multiplexer circuits 40; in each adjacent K rows of fingerprint identification areas 101, the fingerprint signal reading lines 30 electrically connected with the fingerprint identification units 10 in each row of fingerprint identification areas 101 are respectively electrically connected with different multiplexer circuits 40, and the multiplexer circuits 40 can control the conduction of the fingerprint signal reading lines 30 electrically connected with the multiplexer circuits and the fingerprint identification driving chip 50 in a time-sharing manner, that is, the multiplexer circuits 40 can control the conduction of the fingerprint signal reading lines 30 electrically connected with the multiplexer circuits and the fingerprint identification driving chip 50 in different time periods, so that fingerprint identification signals transmitted by the fingerprint signal reading lines 30 do not affect each other; in this way, when a row of fingerprint identification units 10 is driven, fingerprint identification signals output by the fingerprint identification units 10 of at least K fingerprint identification areas 101 in the row can be obtained, so that the fingerprint identification efficiency can be improved; and when the fingerprint identification signals output by the fingerprint identification units 10 of at least K fingerprint identification areas 101 can be obtained at one time, more effective fingerprint identification signals can be obtained compared with the prior art, so that the fingerprint identification precision can be improved. Meanwhile, when one multiplexer circuit 40 is electrically connected to a plurality of fingerprint signal reading lines 30, the fingerprint identification driving chip 50 can have fewer fingerprint identification signal terminals, and the number of pins of the fingerprint identification driving chip 50 is reduced, so that the cost can be reduced.

In addition, when fingerprint identification is performed, the position of the fingerprint identification area 101 covered by the contact area 102 of the finger and the display panel 100 can be determined first, so that when a fingerprint identification signal is acquired, the fingerprint identification unit 10 in the fingerprint identification area 101 covered by the contact area 102 can be directly driven, the fingerprint signal reading line 30 electrically connected with the fingerprint identification unit 10 in the fingerprint identification area 101 covered by the contact area 102 is conducted with the fingerprint identification driving chip 50 through the multiplexer circuit 40, and all the fingerprint identification units 10 in the display area 110 of the display panel 100 do not need to be driven, so that the time required by fingerprint identification can be reduced, the efficiency of fingerprint identification is further improved, and the power consumption of fingerprint identification is reduced.

Illustratively, as shown in fig. 2, the display panel 100 includes 4 rows and 4 columns of fingerprint identification areas 101, and each fingerprint identification area 101 includes 3 rows and 3 columns of fingerprint identification units 10. In the row direction X the contact area 102 of the finger with the display panel 100 is covered with 2 fingerprint identification areas 101, i.e. the contact area 102 covers the fingerprint identification areas 101 of the third and fourth columns. Since the fingerprint signal read lines 30 connected to the fingerprint identification units 10 in the third column of the fingerprint identification area 1013 and the fingerprint signal read lines 30 connected to the fingerprint identification units 10 in the fourth column of the fingerprint identification area 1014 are electrically connected to different multiplexer circuits 40, respectively. When performing fingerprint identification, the fingerprint identification driving chip 50 can receive the fingerprint identification signal output by each fingerprint identification unit 10 of the fingerprint identification area 1013 of the third row and the fingerprint identification signal output by each fingerprint identification unit 10 of the fingerprint identification area 1014 of the fourth row through different multiplexer circuits, so that the fingerprint identification driving chip 50 can obtain the fingerprint identification signal output by the fingerprint identification units 10 of the two rows of the fingerprint identification areas 101 at a time, thereby improving fingerprint identification efficiency and fingerprint identification accuracy.

It should be noted that fig. 2 is only an exemplary diagram of the embodiment of the present invention, and fig. 2 only exemplarily shows that the display panel 100 includes 16 fingerprint identification areas 101, and a contact area 102 of a finger and the display panel 100 covers 2 fingerprint identification areas 101 in the row direction X. In the embodiment of the invention, the number of the fingerprint identification areas in the display panel can be designed according to the size of the display area in the display panel and the fingerprint identification precision requirement; when the fingerprint identification precision is required to be certain, the larger the size of the display area of the display panel is, the larger the number of fingerprint identification areas included in the display panel is; when the size of the display area of the display panel is fixed, the higher the requirement on fingerprint identification precision is, the more the number of fingerprint identification areas included in the display panel is; on the premise that the purpose of the embodiment of the present invention can be achieved, the embodiment of the present invention does not specifically limit the number of the fingerprint identification areas included in the display panel. Meanwhile, the number of fingerprint identification units included in each fingerprint identification area is related to the number of fingerprint identification units per unit area in the display panel, which is not specifically limited in the embodiment of the present invention.

For example, fig. 3 is a schematic structural diagram of another display panel provided in an embodiment of the present invention. The same points in fig. 3 as in fig. 2 can refer to the description of fig. 2, and are not repeated here, and only the differences in fig. 3 from fig. 2 are exemplarily described here. As shown in fig. 3, along the row direction X, the contact area 10 between the finger and the display panel 100 can cover 3 fingerprint identification areas 101, and each fingerprint signal reading line 30 connected to each row of fingerprint identification units 10 in the 3 fingerprint identification areas 101 is electrically connected to a different multiplexer circuit 40. Thus, the fingerprint identification driving chip 50 can acquire the fingerprint identification signals output by the fingerprint identification units 30 located in the three fingerprint identification areas 101 on the same row at one time, and more effective fingerprint identification signals can be acquired at the moment, so that the fingerprint identification efficiency can be improved, and the fingerprint identification precision can be improved.

Alternatively, when the contact area of the finger with the display panel covers 2 fingerprint identification areas in the row direction X, each column of fingerprint identification areas may be divided into odd columns and even columns. The fingerprint signal reading lines electrically connected with the ith row of fingerprint identification units in the odd row of fingerprint identification areas are electrically connected with the same multiplexer circuit; fingerprint signal reading lines electrically connected with the ith row of fingerprint identification units in the even-numbered row of fingerprint identification areas are electrically connected with the same multiplexer circuit; wherein i is a positive integer less than or equal to N.

For example, fig. 4 is a schematic structural diagram of another display panel provided in the embodiment of the present invention. As shown in fig. 4, the display panel 100 includes 4 rows and 4 columns of fingerprint identification areas 101, each fingerprint identification area 101 may include 3 rows and 3 columns of fingerprint identification units 10, and a contact area of a finger with the display panel 100 may cover up to 2 fingerprint identification areas. At this time, the fingerprint signal readout line 30 connected to each row of fingerprint identification units 10 in the first row of fingerprint identification area 1011 includes a fingerprint signal readout line 311, a fingerprint signal readout line 312, and a fingerprint signal readout line 313, the fingerprint signal readout line 30 connected to each row of fingerprint identification units 10 in the second row of fingerprint identification area 1012 includes a fingerprint signal readout line 321, a fingerprint signal readout line 322, and a fingerprint signal readout line 323, the fingerprint signal readout line 30 connected to each row of fingerprint identification units 10 in the third row of fingerprint identification area 1013 includes a fingerprint signal readout line 331, a fingerprint signal readout line 332, and a fingerprint signal readout line 333, and the fingerprint signal readout line 30 connected to each row of fingerprint identification units 10 in the fourth row of fingerprint identification area 1014 includes a fingerprint signal readout line 341, a fingerprint signal readout line 342, and a fingerprint signal readout line 343. The fingerprint signal reading line 311, the fingerprint signal reading line 312, the fingerprint signal reading line 313, the fingerprint signal reading line 321, the fingerprint signal reading line 322, and the fingerprint signal reading line 323 are electrically connected to different multiplexer circuits, respectively, and the fingerprint signal reading line 331, the fingerprint signal reading line 332, the fingerprint signal reading line 333, the fingerprint signal reading line 341, the fingerprint signal reading line 342, and the fingerprint signal reading line 343 are electrically connected to different multiplexer circuits, respectively; the fingerprint signal reading line 311 can be electrically connected to the same multiplexer 41 as the fingerprint signal reading line 331, and the multiplexer 41 can control the fingerprint signal reading line 311 and the fingerprint signal reading line 331 to be electrically connected to the chip 50 in the fingerprint identification area at different time intervals, so that the fingerprint identification signals transmitted by the fingerprint signal reading line 311 and the fingerprint signal reading line 331 do not interfere with each other.

Correspondingly, the fingerprint signal reading line 312 may be electrically connected to the same multiplexer 42 as the fingerprint signal reading line 332, and the multiplexer 42 may control the fingerprint signal reading line 312 and the fingerprint signal reading line 332 to be conducted with the fingerprint identification area chip 50 at different time intervals; the fingerprint signal reading line 313 and the fingerprint signal reading line 333 are electrically connected with the same multiplexer 43, and the multiplexer 43 can control the conduction of the fingerprint signal reading line 313 and the fingerprint signal reading line 333 with the fingerprint identification area chip 50 at different time intervals; the fingerprint signal reading line 321 can be electrically connected with the same multiplexer 44 as the fingerprint signal reading line 341, and the multiplexer 44 can control the fingerprint signal reading line 321 and the fingerprint signal reading line 341 to be conducted with the fingerprint identification area chip 50 at different time periods; the fingerprint signal reading line 322 can be electrically connected with the same multiplexer 45 as the fingerprint signal reading line 342, and the multiplexer 45 can control the fingerprint signal reading line 322 and the fingerprint signal reading line 342 to be conducted with the fingerprint identification area chip 50 at different time intervals; the fingerprint signal reading line 323 can be electrically connected to the same multiplexer 46 as the fingerprint signal reading line 343, and the multiplexer 46 can control the fingerprint signal reading line 323 and the fingerprint signal reading line 343 to be electrically connected to the fingerprint identification area chip 50 at different time intervals.

Since the contact area 102 of the display panel 100 can cover 2 fingerprint identification areas at most in the row direction X, if the fingerprint signal reading lines 30 connected to the fingerprint identification units of the 2 fingerprint identification areas 101 simultaneously covered by the contact area 102 in the row direction X are electrically connected to different multiplexer circuits, the fingerprint identification signals output by the fingerprint identification units 10 of the two fingerprint identification areas 101 covered by the contact area 102 in the row direction X can be simultaneously read. In this way, by making one fingerprint signal reading line 30 electrically connected to the ith row fingerprint identification unit 10 of each fingerprint identification area 101 of the odd-numbered rows share one multiplexer circuit 40, and making one fingerprint signal reading line 30 electrically connected to the ith row fingerprint identification unit 10 of each fingerprint identification area 101 of the even-numbered rows share one multiplexer circuit 40, fingerprint identification efficiency and fingerprint identification accuracy can be improved; meanwhile, the number of the fingerprint identification signal terminals of the fingerprint identification driving chip 50 and the multiplexer circuits 40 can be further reduced, so that the cost of the display panel 100 can be reduced, the size of the non-display area 120 can be reduced, and the narrow frame of the display panel 100 can be facilitated. Wherein, the ith column refers to one of the N columns of fingerprint identification units in one fingerprint identification area 101.

It should be noted that, on the premise that the multiplexer circuit can achieve time-sharing conduction between each fingerprint signal reading line electrically connected with the multiplexer circuit and the fingerprint identification driving chip, the specific structure of the multiplexer circuit is not specifically limited in the embodiments of the present invention.

Alternatively, each multiplexer circuit may comprise a plurality of transistors; and the output electrodes of all transistors in the same multiplexer circuit are electrically connected with the same signal pin; the control electrodes of all transistors of the same multiplexer circuit are electrically connected with different clock control signal lines respectively; the input electrodes of all transistors in the same multiplexer circuit are respectively connected with fingerprint signal reading lines electrically connected with the ith row of fingerprint identification units in each row of fingerprint identification areas; wherein i is a positive integer less than or equal to N.

For example, fig. 5 is a schematic structural diagram of another display panel provided in an embodiment of the present invention. As shown in fig. 5, the display panel 100 includes 4 rows and 4 columns of fingerprint identification areas 101, and each fingerprint identification area 101 may include 3 rows and 3 columns of fingerprint identification units 10. If the contact area 102 between the finger and the display panel 100 in the row direction covers at most two fingerprint identification areas 101 in the row direction, the fingerprint signal reading lines 30 electrically connected to the ith row fingerprint identification units of each fingerprint identification area 101 in the odd-numbered columns can be respectively and correspondingly electrically connected to the transistors of the same multiplexer circuit, and the fingerprint signal reading lines 30 electrically connected to the ith row fingerprint identification units of each fingerprint identification area 101 in the even-numbered columns can be respectively and correspondingly electrically connected to the transistors of the same multiplexer circuit.

For example, a fingerprint signal reading line shared by the first row of fingerprint identification units in the first row middle fingerprint identification area 101 and a fingerprint signal reading line shared by the first row of fingerprint identification units in the third row middle fingerprint identification area 101 may be respectively and electrically connected with the input electrodes of the two first transistors T1 of the first multiplexer circuit in a one-to-one correspondence manner, the output electrodes of the two first transistors T1 of the first multiplexer circuit are electrically connected with the same signal pin 401, and the control electrodes of the two first transistors T1 of the first multiplexer circuit are respectively and electrically connected with the clock signal lines SW1 and SW 3; a fingerprint signal reading line shared by the second row of fingerprint identification units of the first row of fingerprint identification area 101 and a fingerprint signal reading line shared by the second row of fingerprint identification units of the third row of fingerprint identification area 101 can be respectively and correspondingly electrically connected with the input electrodes of the two second transistors T2 of the second multiplexer circuit, and the output electrodes of the two second transistors T2 of the second multiplexer circuit are electrically connected with the same signal pin 402; the fingerprint signal readout line shared by the third row of fingerprint identification units of the first row of fingerprint identification area 101 and the fingerprint signal readout line shared by the third row of fingerprint identification units of the third row of fingerprint identification area 101 may be respectively electrically connected to the input electrodes of the two third transistors T3 of the third multiplexer circuit in a one-to-one correspondence manner, and the output electrodes of the two third transistors T3 of the third multiplexer circuit are electrically connected to the same signal pin 403.

Correspondingly, a fingerprint signal reading line shared by the first row of fingerprint identification units in the second row of fingerprint identification area 101 and a fingerprint signal reading line shared by the first row of fingerprint identification units in the fourth row of fingerprint identification area 101 can be respectively and electrically connected with the input electrodes of the two fourth transistors T4 of the fourth multiplexer circuit in a one-to-one correspondence manner, the output electrodes of the two fourth transistors T4 of the fourth multiplexer circuit are electrically connected with the same signal pin 404, and the control electrodes of the two fourth transistors T4 of the fourth multiplexer circuit are respectively and electrically connected with the clock signal lines SW2 and SW 4; a fingerprint signal reading line shared by the second row of fingerprint identification units in the second row of fingerprint identification area 101 and a fingerprint signal reading line shared by the second row of fingerprint identification units in the fourth row of fingerprint identification area 101 can be respectively and electrically connected with the input electrodes of the two fifth transistors T5 of the fifth multiplexer circuit in a one-to-one correspondence manner, and the output electrodes of the two fifth transistors T5 of the fifth multiplexer circuit are electrically connected with the same signal pin 405; a fingerprint signal reading line shared by the fingerprint recognition units in the fourth row of the second fingerprint recognition area 101 and a fingerprint signal reading line shared by the fingerprint recognition units in the third row of the middle fingerprint recognition area 101 can be respectively and electrically connected with the input electrodes of the two sixth transistors T6 of the sixth multiplexer circuit in a one-to-one correspondence manner, and the output electrodes of the two sixth transistors T6 of the sixth multiplexer circuit are electrically connected with the same signal pin 406.

In this way, when the control electrodes of the transistors of the same multiplexer circuit are electrically connected with different clock control signal lines, different clock control signals are transmitted through different clock control signal lines, so that the transistors of the same multiplexer circuit are turned on at different time periods, and fingerprint signals transmitted by fingerprint signal reading lines electrically connected with the transistors of the same multiplexer circuit are prevented from interfering with each other; meanwhile, the multi-channel selector circuit can realize the time-sharing conduction of each fingerprint signal reading line and the fingerprint identification driving chip only through different transistors, and the multi-channel selector circuit is simple in structure and beneficial to reducing the cost of the display panel.

In addition, the fingerprint identification driving chip 50 is provided with fingerprint identification signal terminals 501-506 corresponding to the signal pins 401-406 electrically connected with different transistors of each multiplexer circuit one by one, and the fingerprint identification signal terminals 501-506 can receive fingerprint identification signals output by each fingerprint identification unit 10, so that the fingerprint identification driving chip 50 can realize a fingerprint identification function.

Optionally, the control electrodes of the transistors electrically connected to the fingerprint signal reading lines in the same fingerprint identification area are electrically connected to the same clock control signal line. Therefore, the fingerprint signal reading lines electrically connected with the fingerprint identification units in the same fingerprint identification area can be simultaneously conducted with the fingerprint identification driving chip 50 through one clock control signal line, so that the fingerprint identification driving chip 50 can simultaneously receive the fingerprint identification signals output by the fingerprint identification units 10 in one fingerprint identification area 101, and the efficiency and the accuracy of fingerprint identification are improved; meanwhile, the transistors electrically connected with the fingerprint signal reading lines in the same fingerprint identification area belong to different multiplexer circuits, and when the transistors of different multiplexer circuits share one clock control signal line, the number of wiring arrangement can be reduced, which is beneficial to reducing the size of the non-display area 120, thereby being beneficial to the narrow frame of the display panel.

Illustratively, with continued reference to fig. 5, the transistors T1, T2, T3, T4, T5 and T6 are transistors of different multiplexer circuits, respectively, and by electrically connecting the control electrodes of the transistors T1, T2 and T3 to the same clock control signal line SW1 and electrically connecting the control electrodes of the transistors T4, T5 and T6 to the same clock control signal line SW2, the fingerprint identification signals transmitted by six fingerprint signal lines electrically connected to the transistors T1, T2, T3, T4, T5 and T6 can be simultaneously transmitted to the fingerprint identification signal terminals 501-506 of the fingerprint identification driving chip 50 during fingerprint identification, so that the fingerprint identification driving chip 50 can simultaneously obtain the fingerprint identification signals transmitted by six fingerprint signal read lines, thereby facilitating improvement of efficiency and accuracy of fingerprint identification; meanwhile, compared with the case that the control electrodes of the transistors T1, T2, T3, T4, T5 and T6 are respectively electrically connected to one clock control signal line, the embodiment of the invention can reduce the number of the clock control signal lines, and is beneficial to reducing the size of the non-display area 120, thereby being beneficial to the narrow frame of the display panel 100.

Optionally, fig. 6 is a schematic structural diagram of another display panel provided in the embodiment of the present invention. As shown in fig. 6, the display area 110 of the display panel 100 further includes a plurality of fingerprint identification scan lines 81; the non-display area 120 of the display panel 100 further includes a plurality of fingerprint recognition scanning circuits 61; each fingerprint identification scanning circuit 61 comprises a plurality of cascaded first shift register units 601; each row of fingerprint identification areas 101 corresponds to the same fingerprint identification scanning circuit 61; the fingerprint identification units 10 in the same row are electrically connected with the same fingerprint identification scanning line 81; each fingerprint identification scanning line 81 in the same row of fingerprint identification area 101 is electrically connected with the first output end of the multistage first shift register unit 601 in a one-to-one correspondence manner; the fingerprint identification scanning circuit 61 is configured to transmit a fingerprint identification scanning signal to each fingerprint identification scanning line 81 electrically connected thereto line by line. In this way, when each row of fingerprint identification area 101 corresponds to one fingerprint identification scanning circuit 61, when fingerprint identification is performed, the fingerprint identification scanning circuit 61 corresponding to the fingerprint identification area 101 covered by the contact area 102 of the finger and the display panel 100 can be used for driving each row of fingerprint identification units 10 line by line, and all the fingerprint identification scanning circuits 61 do not need to be started to drive all the row of fingerprint identification units 10 in the display panel 100 line by line, so that the fingerprint identification efficiency can be further improved, and meanwhile, the power consumption of fingerprint identification can be reduced.

Illustratively, when the contact area 102 of the finger with the display panel 100 covers the second and third rows of fingerprint identification areas 101, the fingerprint identification scanning circuits 61 electrically connected to the fingerprint identification scanning lines 81 corresponding to the second and third rows of fingerprint identification areas can drive the fingerprint identification units 10 of each row in the second and third rows of fingerprint identification areas 101 line by line, while the fingerprint identification scanning circuits 61 electrically connected to the fingerprint identification scanning lines 81 of the other rows of fingerprint identification areas 101 do not drive the fingerprint identification units 10 of each row of the fingerprint identification areas 101 of the corresponding row. Therefore, the fingerprint identification units 10 in the fingerprint identification areas 101 of the second row and the third row can be directly driven, the driving time is saved, the fingerprint identification efficiency is improved, and meanwhile, the power consumption of fingerprint identification is reduced.

Meanwhile, the display area of the display panel also comprises a plurality of pixels arranged in an array manner, so that the display panel can display and emit light; and the fingerprint identification unit may be located between two adjacent pixels, i.e., a non-opening area of the display panel. Therefore, on the premise of not influencing the display luminescence of the display panel, the full-screen fingerprint identification of the display panel can be realized.

It should be noted that, in the embodiment of the present invention, one pixel may include one display unit, and the display color of the display unit may be any one of red, green, and blue, for example; a pixel may also include a plurality of display units of different display colors, for example, a pixel may include display units of three different display colors, and the display colors of the display units of the three different display colors may be red, green, and blue; the embodiment of the present invention is not particularly limited to this. For convenience of description, in the embodiment of the present invention, an example in which one pixel includes one display unit is described.

When a frame of picture is displayed on the display panel, pixels in the display panel need to be driven line by line to write data signals into the pixels line by line, and the pixels of the display panel are driven to display light to present a corresponding picture.

For example, fig. 7 is a schematic structural diagram of another display panel provided in an embodiment of the present invention. As shown in fig. 7, the display area 110 of the display panel 100 further includes a plurality of pixels 20 arranged in an array, and the fingerprint identification unit 10 is located between two adjacent pixels 20; the display area 110 further includes a plurality of fingerprint identification scan lines 81 and a plurality of display scan lines 82, the pixels 20 in the same row are electrically connected to the same display scan line 82, and the fingerprint identification units 10 in the same row are electrically connected to the same fingerprint identification scan line 81; wherein, the fingerprint identification scan line 81 can transmit fingerprint identification scan signals, and the display scan line 82 can transmit display scan signals. At this time, the non-display area 120 of the display panel 100 further includes a display scanning circuit 62, and the display scanning circuit 62 includes a plurality of cascaded second shift register units 602; each display scanning line 82 is electrically connected with the output end of each second shift register unit 602 in a one-to-one correspondence manner; the display scanning circuit 62 can transmit a display scanning signal to each display scanning line 82 electrically connected thereto line by line to realize line by line driving of each pixel in the display panel 100, so that the display panel 100 can display a corresponding picture.

It should be noted that fig. 7 is a diagram illustrating an embodiment of the present invention, and fig. 7 shows that the scanning circuit 62 and the fingerprint identification scanning circuit 61 are divided into different sides located in the display area 110; the display scanning circuit 62 and the fingerprint identification scanning circuit 61 can also be disposed on the same side of the display area 110 in the embodiment of the present invention; or, the display scanning driving circuit may include a display scanning circuit in an odd row and a display scanning circuit in an even row, where the display scanning circuit in the odd row and the display scanning circuit in the even row may be respectively located at two opposite sides of the display region; the fingerprint identification scanning circuit can also comprise a fingerprint identification scanning circuit in an odd-numbered line and a fingerprint identification scanning circuit in an even-numbered line, and the fingerprint identification scanning circuit in the odd-numbered line and the fingerprint identification scanning circuit in the even-numbered line can be respectively positioned at two opposite sides of the display area; alternatively, the display scan driving circuit and the fingerprint identification scan driving circuit may also be integrated into one scan driving circuit, which is not specifically limited in this embodiment of the present invention.

For example, fig. 8 is a schematic structural diagram of another display panel provided in the embodiment of the present invention. As shown in fig. 8, the display area 110 of the display panel 100 includes a plurality of pixels 20 arranged in an array, and the fingerprint identification unit 10 is located between two adjacent pixels 20; the display area 110 of the display panel 100 further includes a plurality of display scan lines 82 and a plurality of fingerprint identification scan lines 81, the pixels 20 in the same row are electrically connected to the same display scan line 82, and the fingerprint identification units 10 in the same row are electrically connected to the same fingerprint identification scan line 81; wherein, the fingerprint identification scan line 81 can transmit fingerprint identification scan signals, and the display scan line 82 can transmit display scan signals. Each of the first shift stage register units 601 of the fingerprint identification scanning circuit 61 located in the non-display area 120 of the display panel 100 may include a first output terminal and a second output terminal. Each fingerprint identification scanning line 81 is electrically connected to the first output end of each first shift register unit 601 of each fingerprint identification scanning circuit 61 in a one-to-one correspondence manner, and each display scanning line 82 is electrically connected to the second output end of each first shift register unit 601 of each fingerprint identification scanning circuit 61 in a one-to-one correspondence manner.

In this way, when performing fingerprint identification, each stage of the first shift register unit 601 of the fingerprint identification scanning circuit 61 can provide a fingerprint identification scanning signal, and transmit the fingerprint identification scanning signal to each fingerprint identification unit 10 through the fingerprint identification scanning line 81, so as to realize line-by-line driving of each fingerprint identification unit 10; when displaying a picture, the first shift register units 601 of the fingerprint identification scanning circuit 61 at each stage can provide a display scanning signal, and the display scanning signal is transmitted to each pixel 20 through the finger display scanning line 82, so as to drive each pixel 20 row by row. Meanwhile, a display scanning circuit does not need to be additionally arranged in the display panel 100, which is beneficial to reducing the area of the non-display area 120 in the display panel 100, thereby being beneficial to the narrow frame of the display panel 100.

Furthermore, when only the fingerprint identification unit in the fingerprint identification area covered by the contact area of the finger with the display panel is driven, the position of the contact area needs to be judged to determine the fingerprint identification unit in the fingerprint identification area to be driven. Wherein, the position of the contact area can be directly judged by adopting a fingerprint identification unit; or for a display panel with a touch function, the touch electrode in the display panel may be used to determine the position of the contact area 102. The embodiment of the present invention is not particularly limited to this.

For example, fig. 9 is a schematic structural diagram of another display panel provided in the embodiment of the present invention. As shown in fig. 9, each fingerprint identification area 101 in the display area 110 of the display panel 100 is further provided with a plurality of touch electrodes 70 arranged in an array; the touch electrode is used for determining the position of a contact area of a finger and the display panel. In this way, when performing fingerprint identification, the touch electrode 70 may be used to determine the position of the contact area 102 between the finger and the display panel 100 to determine the fingerprint identification area 101 covered by the contact area 102, and drive each fingerprint identification unit 10 of the fingerprint identification area 101 covered by the contact area 102, so that each fingerprint identification unit 10 can acquire a fingerprint identification signal and output the acquired fingerprint identification signal through the fingerprint signal reading line 30; meanwhile, the multiplexer circuit 40 controls the fingerprint signal reading lines 30 connected to the fingerprint identification units 10 of the fingerprint identification area 101 to be conducted with the fingerprint identification driving chip 50, so that the fingerprint identification driving chip 50 can acquire the fingerprint identification signal and perform a fingerprint identification function, such as payment, unlocking, and the like, after performing fingerprint identification.

The touch electrode 70 may be a self-capacitance type touch electrode or a mutual capacitance type touch electrode, which is not specifically limited in this embodiment of the present invention. When the touch electrode 70 is a mutual capacitance type touch electrode, the touch electrode 70 may include a touch driving electrode and a touch sensing electrode, and the touch function may be realized by detecting a variation of a capacitance formed between the touch driving electrode and the touch sensing electrode, and the position of the contact area 102 between the finger and the display panel 100 may be determined according to the coordinate position of the touch electrode; when the touch electrode 70 is a self-capacitance touch electrode, the touch function can be realized by detecting the variation of the capacitance formed between the touch electrode and the ground, and the position of the contact area 102 between the finger and the display panel 100 can be determined according to the coordinate position of the touch electrode.

The embodiment of the invention also provides a fingerprint identification method, which can be applied to the display panel provided by the embodiment of the invention so that the display panel can execute a fingerprint identification function. Fig. 10 is a flowchart of a fingerprint identification method according to an embodiment of the present invention. As shown in fig. 10, the fingerprint identification method includes:

s110, determining the position of a contact area of a finger and the display panel;

and S120, controlling a multiplexer circuit to conduct fingerprint signal reading lines electrically connected with a plurality of fingerprint identification units corresponding to a plurality of fingerprint identification areas in the contact area with a fingerprint identification driving chip, and acquiring fingerprint identification signals output by the fingerprint identification units in at least two rows of fingerprint identification areas in the contact area so as to acquire a fingerprint image.

For example, as shown in fig. 2, when performing fingerprint identification, the position of a contact area 102 between a finger and the display panel 100 is obtained, and the fingerprint identification area 101 covered by the contact area 102 is determined to be a fingerprint identification area of a third column and a fourth column, at this time, the multiplexer circuit is controlled to conduct each fingerprint signal reading line 30 connected to each column of fingerprint identification units 10 of the third column and the fourth column of set identification areas 10 with the fingerprint identification driving chip 50, so that the fingerprint identification signals transmitted by each fingerprint signal reading line 30 connected to each column of fingerprint identification units 10 of the third column and the fourth column of set identification areas 10 are input into the fingerprint identification driving chip 50. The fingerprint recognition driving chip 50 can acquire a fingerprint image of a finger currently in contact with the display panel 100 according to the acquired fingerprint recognition signal, and match the fingerprint image with a pre-stored fingerprint image; if the matching is successful, the display panel 100 can execute the corresponding function; if the matching fails, the fingerprint signal can be acquired again, or the acquisition of the fingerprint identification signal is finished.

So, through confirming the position of finger and display panel contact area, the fingerprint signal that the corresponding multiplexer circuit of control switched on the fingerprint identification area that this contact area covered reads the line and switches on with fingerprint identification driver chip for fingerprint identification driver chip can acquire the fingerprint identification signal that fingerprint identification unit output of at least two fingerprint identification areas that finger and display panel contact area covered, in order to obtain more effectual fingerprint identification signals, thereby improve fingerprint identification's efficiency, and improve fingerprint identification's the degree of accuracy.

Alternatively, the manner of determining the position of the contact area of the finger with the display panel may be: and sequentially determining fingerprint identification areas of each row and each column of the contact area by using a fingerprint identification unit. Fig. 11 is a flowchart of a method for determining a position of a contact region according to an embodiment of the present invention. As shown in fig. 11, the method of determining the position of the contact area of the finger with the display panel includes:

s1111, controlling all the multi-channel selector circuits to simultaneously conduct all the fingerprint signal reading lines and the fingerprint identification driving chip, and sequentially controlling the jth row of fingerprint identification units in each row of fingerprint identification area to output a first fingerprint identification signal through the fingerprint signal reading lines; wherein j is a positive integer less than or equal to M;

s1112 determines a row of the fingerprint identification area in the contact area according to the first fingerprint identification signal.

Illustratively, the display panel shown in fig. 6 is taken as an example for explanation. In the fingerprint recognition, it is necessary to know the row and column where the fingerprint recognition area 101 covered by the contact area 102 of the display panel 100 is located. All the fingerprint signal reading lines 30 are conducted with the fingerprint identification driving chip 50 by controlling the multiplexer circuit 40, and sequentially drive one row of the fingerprint identification units 10 in each row of the fingerprint identification area 101 for fingerprint identification, and output fingerprint identification signals through the fingerprint signal reading lines 30, for example, the first row of the fingerprint identification units 10 in each row of the fingerprint identification area 101 can be sequentially driven for fingerprint identification. When the first row fingerprint identification units 10 of the first row fingerprint identification area 101 are driven, because the first row fingerprint identification units 10 of the first row fingerprint identification area 101 are not covered by the contact area 102, the fingerprint identification signals output by the first row fingerprint identification units 10 of the first row fingerprint identification area 101 do not carry any fingerprint information, and therefore the first row fingerprint identification area is determined as the fingerprint identification area which is not covered by the contact area 102; when the first row fingerprint identification units 10 of the second row fingerprint identification area 101 are driven, since the first row fingerprint identification units 10 of the second row fingerprint identification area 101 are covered by the contact area 102, fingerprint identification signals output by the first row fingerprint identification units 10 of the second row fingerprint identification area 101 carry fingerprint information, and therefore the second row fingerprint identification area is determined as the fingerprint identification area covered by the contact area 102; when the first row fingerprint identification units 10 of the third row fingerprint identification areas 101 are driven, since the first row fingerprint identification units 10 of the third row fingerprint identification areas 101 are covered by the contact areas 102, fingerprint identification signals output by the first row fingerprint identification units 10 of the third row fingerprint identification areas 101 carry fingerprint information, and therefore the third row fingerprint identification areas are determined as fingerprint identification areas covered by the contact areas 102; when the first row fingerprint identification unit 10 of the fourth row fingerprint identification area 101 is driven, since the first row fingerprint identification unit 10 of the fourth row fingerprint identification area 101 is not covered by the contact area 102, the fingerprint identification signal output by the first row fingerprint identification unit 10 of the fourth row fingerprint identification area 101 does not carry any fingerprint information, and therefore the fourth row fingerprint identification area is determined as the fingerprint identification area which is not covered by the contact area 102; thus, the second and third rows of the fingerprint identification area 101 covered by the contact area 102 can be determined.

S1113, sequentially controlling each multiplexer circuit to conduct fingerprint signal reading lines electrically connected with at least one column of fingerprint identification units in the central area of each fingerprint identification area with a fingerprint identification driving chip, simultaneously conducting the fingerprint signal reading lines electrically connected with different multiplexer circuits with the fingerprint identification driving chip, and controlling at least one fingerprint identification unit in the central area of each fingerprint identification area in a row of each fingerprint identification area in a contact area to output a second fingerprint identification signal through the fingerprint signal reading lines;

and S1114, determining the columns of the fingerprint identification areas in the contact area according to the second fingerprint identification signals.

Specifically, after the row where the fingerprint identification area covered by the contact area is located is judged, all the multi-channel selector circuits are sequentially controlled to conduct fingerprint signal reading lines electrically connected with at least one row of fingerprint identification units in the central area of each fingerprint identification area with a fingerprint identification driving chip; at the moment, the fingerprint signal reading lines electrically connected with different multiplexer circuits can be simultaneously conducted with the fingerprint identification driving chip so as to acquire the fingerprint identification signals output by the fingerprint identification units in multiple rows of fingerprint identification areas at one time, and the judgment efficiency can be improved; meanwhile, each fingerprint identification signal electrically connected with the same multiplexer circuit is conducted with the fingerprint identification driving chip in a time-sharing mode, so that signal crosstalk is prevented, and judgment accuracy is influenced.

When one fingerprint identification area of the display panel comprises N columns of fingerprint identification units, N can be an odd number or an even number. When N is an odd number, the multiplexer circuit can be sequentially controlled to enable the fingerprint signal reading lines which are electrically connected with the middle row of fingerprint identification units in the N rows of fingerprint identification units in each fingerprint identification area to be communicated with the fingerprint identification driving chip. When N is an even number, the multiplexer circuit is sequentially controlled to enable the N rows of fingerprint identification units in each fingerprint identification area and the two rows of fingerprint identification units in the middle to be electrically connected with the fingerprint signal reading line and the fingerprint identification driving chip to be conducted.

For example, taking the display panel shown in fig. 6 as an example, one fingerprint identification area 101 of the display panel 100 includes 3 rows and 3 columns of fingerprint identification units 10, and the number of columns of the fingerprint identification units 10 in one fingerprint identification area 101 of the display panel 100 is an odd number. The multiplexer circuit 40 can be sequentially controlled to conduct the fingerprint signal reading line 30 electrically connected with the second row fingerprint identification units 10 of each fingerprint identification area 101 with the fingerprint identification driving chip 50; at this time, the fingerprint signal reading line electrically connected to the second row of fingerprint identification units in the first row of fingerprint identification area and the fingerprint signal reading line electrically connected to the second row of fingerprint identification units in the third row of fingerprint identification area are simultaneously conducted with the fingerprint identification driving chip 50; and the fingerprint signal reading line electrically connected with the second row fingerprint identification unit of the second row fingerprint identification area can be simultaneously conducted with the fingerprint identification driving chip 50 with the fingerprint signal reading line electrically connected with the second row fingerprint identification unit of the fourth row fingerprint identification area. Meanwhile, when the row where the fingerprint identification area covered by the contact area 102 is located is the second row and the third row, the fingerprint identification units in the second column in the fingerprint identification areas in the second row and the fingerprint identification units in the second column in the fingerprint identification areas in the third row can be sequentially driven to carry out fingerprint identification; at this time, the fingerprint identification units capable of transmitting the fingerprint identification signals to the fingerprint identification area chip through the fingerprint signal reading lines are respectively a second row and second column fingerprint identification unit of a first column fingerprint identification area, a second row and second column fingerprint identification unit of a second column fingerprint identification area, a second row and second column fingerprint identification unit of a third column fingerprint identification area and a second row and second column fingerprint identification unit of a fourth column fingerprint identification area in the second row and third row fingerprint identification areas. Since the second row and the second column of fingerprint identification elements of the second row and the first column of fingerprint identification areas, the second row and the second column of fingerprint identification elements of the third row and the first column of fingerprint identification areas, the second row and the second column of fingerprint identification elements of the second row and the fourth column of fingerprint identification areas and the second row and the second column of fingerprint identification elements of the third row and the fourth column of fingerprint identification areas are not covered by the contact area 102, therefore, the fingerprint identification signals output by the second row and second column fingerprint identification units of the second row and first column fingerprint identification area, the second row and second column fingerprint identification units of the third row and first column fingerprint identification area, the second row and second column fingerprint identification units of the second row and fourth column fingerprint identification area and the second row and second column fingerprint identification units of the third row and fourth column fingerprint identification area do not carry any fingerprint information, it may be determined that the columns of fingerprint identification areas covered by the contact area 102 are not the first and fourth columns; since the second row and the second column of fingerprint identification elements of the second row and the second column of fingerprint identification areas, the second row and the second column of fingerprint identification elements of the third row and the second column of fingerprint identification areas, the second row and the second column of fingerprint identification elements of the second row and the third column of fingerprint identification areas and the second row and the second column of fingerprint identification elements of the third row and the third column of fingerprint identification areas are covered by the contact area 102, therefore, the fingerprint identification signals output by the second row and second column fingerprint identification units of the second row and second column fingerprint identification areas, the second row and second column fingerprint identification units of the third row and second column fingerprint identification areas, the second row and second column fingerprint identification units of the second row and third column fingerprint identification areas and the second row and second column fingerprint identification units of the third row and third column fingerprint identification areas carry fingerprint information, it can be determined that the fingerprint identification area covered by the contact area 102 is in columns of the second and third columns.

So, can determine the row and the row that the fingerprint identification region place that the contact area of finger and display panel covered through the fingerprint identification unit among the display panel to control multiplexer circuit and read line and fingerprint identification driver chip and switch on each fingerprint signal that corresponds the row, and the fingerprint identification unit output fingerprint identification signal that the drive corresponds the row, thereby can improve fingerprint identification efficiency, and improve the fingerprint identification degree of accuracy.

It should be noted that, when determining the row of the fingerprint identification area covered by the contact area, the difference between N being an even number and N being an odd number is that when N being an even number, the fingerprint signal reading line electrically connected to the two fingerprint identification units in the middle of one fingerprint identification area can be simultaneously conducted with the fingerprint identification driving chip, and as long as there is an effective fingerprint identification signal in the two fingerprint identification units, the row of the fingerprint identification area covered by the contact area to which the two fingerprint identification units belong can be determined; other technical principles are similar to those when N is an odd number, and reference may be made to the description when N is an odd number, which is not specifically limited in the embodiment of the present invention.

Optionally, each fingerprint identification period of the display panel may include a first display period and a second display period; the first display period comprises a display stage and a position identification stage; the second display period comprises a display stage and a fingerprint identification stage; wherein, the display stage is used for displaying a frame of picture; the position identification stage is used for determining the position of a contact area of a finger and the display panel; and the fingerprint identification stage is used for acquiring fingerprint identification signals output by each fingerprint identification unit in the fingerprint identification area in the contact area. So, set up position identification stage and fingerprint identification stage respectively in different display periods, can avoid the longer refresh frequency that influences display panel of whole process of fingerprint identification to be favorable to improving display panel's refresh frequency, and then improve display panel's display effect.

Optionally, when each fingerprint identification area in the display area of the display panel is further provided with a plurality of touch electrodes arranged in an array, the manner of determining the position of the contact area between the finger and the display panel may be to obtain a touch signal of the touch electrode in each fingerprint identification area, and determine, according to the touch signal, the row and the column where the fingerprint identification area covered by the contact area between the finger and the display panel is located. Fig. 12 is a flowchart of another method for determining the position of a contact region according to an embodiment of the present invention. As shown in fig. 12, the method of determining the position of the contact area of the finger with the display panel includes:

s1121, acquiring a touch signal of each touch electrode of each fingerprint identification area;

s1122, determining the row and the column of the fingerprint identification area in the contact area of the finger and the display panel according to the touch signal.

For example, taking the display panel shown in fig. 9 as an example, each fingerprint identification area 101 of the display panel 100 may include 4 touch electrodes 70, and the touch electrodes 70 may be mutual capacitive touch electrodes or self capacitive touch electrodes. Taking the touch electrode 70 as a self-contained touch electrode as an example, when fingerprint recognition is performed, the capacitance formed between the touch electrode 70 in the contact area of the finger and the display panel 100 and the ground is changed due to the deformation of the touch electrode 70 in the contact area, and the fingerprint recognition area 101 where the touch electrode 70 with the changed capacitance is located is determined as the fingerprint recognition area covered by the contact area 102, so that the row and the column where the fingerprint recognition area covered by the contact area 102 is located can be determined. At this time, the multiplexer is controlled to conduct the fingerprint signal reading lines 30 connected to the fingerprint identification units 10 in each row in the fingerprint identification area 102 covered by the contact area 102 with the fingerprint identification driving chip 50, and drive the fingerprint identification units 10 in each row in the fingerprint identification area 101 covered by the contact area 102 row by row to output fingerprint identification signals, so that the fingerprint identification driving chip 50 can acquire the fingerprint information of the finger for fingerprint identification.

The embodiment of the present invention further provides a display device, where the display device includes the display panel provided in the embodiment of the present invention, and the display panel performs fingerprint identification by using the fingerprint identification method provided in the embodiment of the present invention, so that the display device has the beneficial effects of the display panel and the fingerprint identification method provided in the embodiment of the present invention, and in the same way, reference may be made to the above description of the display panel and the fingerprint identification method, and details thereof are not repeated here.

Exemplarily, fig. 13 is a schematic structural diagram of a display device according to an embodiment of the present invention. As shown in fig. 13, the display device 200 includes the display panel 100 according to the embodiment of the present invention. The display apparatus 200 may be, for example, a portable display device, a wearable display device, and the like, which is not particularly limited in this embodiment of the present invention.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A display panel, comprising: a display area and a non-display area surrounding the display area;

2. The display panel according to claim 1, wherein K is equal to 2;

the fingerprint signal reading lines electrically connected with the ith row of fingerprint identification units in the fingerprint identification areas in the odd rows are electrically connected with the same multiplexer circuit; the fingerprint signal reading lines electrically connected with the ith row fingerprint identification units in the fingerprint identification areas in the even rows are electrically connected with the same multiplexer circuit; wherein i is a positive integer less than or equal to N.

3. The display panel of claim 1, wherein the display area further comprises a plurality of fingerprint identification scan lines; the non-display area further comprises a plurality of fingerprint identification scanning circuits; the fingerprint identification scanning circuit comprises a plurality of cascaded first shift register units; each row of fingerprint identification areas corresponds to the same fingerprint identification scanning circuit;

the fingerprint identification units positioned on the same row are electrically connected with the same fingerprint identification scanning line;

all the fingerprint identification scanning lines in the same row of the fingerprint identification areas are electrically connected with the first output ends of the multistage first shift register units in a one-to-one correspondence mode;

the fingerprint identification scanning circuit is used for transmitting fingerprint identification scanning signals to the fingerprint identification scanning lines electrically connected with the fingerprint identification scanning circuit line by line.

4. The display panel according to claim 3, wherein the display region further comprises a plurality of pixels arranged in an array, and the fingerprint identification unit is located between two adjacent pixels;

the display area also comprises a plurality of display scanning lines, and the pixels positioned in the same row are electrically connected with the same display scanning line;

the non-display area further comprises a display scanning circuit; the display scanning circuit comprises a plurality of cascaded second shift register units; each display scanning line is electrically connected with the output end of each second shift register unit in a one-to-one correspondence manner;

the display scanning circuit is used for transmitting display scanning signals to the display scanning lines electrically connected with the display scanning circuit line by line.

5. The display panel according to claim 3, wherein the display region further comprises a plurality of pixels arranged in an array, and the fingerprint identification unit is located between two adjacent pixels;

and each display scanning line is respectively and correspondingly electrically connected with the second output end of each first shift register unit of each stage of the fingerprint identification scanning circuit.

6. The display panel of claim 1, wherein each of the multiplexer circuits comprises a plurality of transistors;

the output electrodes of the transistors in the same multiplexer circuit are electrically connected with the same signal pin; control electrodes of the transistors of the same multiplexer circuit are electrically connected with different clock control signal lines respectively; the input electrodes of the transistors in the same multiplexer circuit are respectively connected with the fingerprint signal reading lines electrically connected with the ith row of fingerprint identification units in each row of fingerprint identification areas; wherein i is a positive integer less than or equal to N.

7. The display panel according to claim 6, wherein control electrodes of the transistors electrically connected to the fingerprint signal readout lines of the same fingerprint identification area are electrically connected to the same clock control signal line.

8. The display panel according to claim 6, further comprising: a fingerprint identification driving chip; the fingerprint identification driving chip comprises a plurality of fingerprint identification signal terminals;

and each signal pin is electrically connected with each fingerprint identification signal terminal in a one-to-one correspondence manner.

9. The display panel according to claim 1, wherein each fingerprint identification area of the display area is further provided with a plurality of touch electrodes arranged in an array;

the touch electrode is used for determining the position of a contact area of a finger and the display panel.

10. A fingerprint recognition method using the display panel according to any one of claims 1 to 9, comprising:

determining the position of a contact area of a finger and the display panel;

11. The fingerprint recognition method of claim 10, wherein the determining the position of the contact area of the finger with the display panel comprises:

controlling each multiplexer circuit to simultaneously conduct all the fingerprint signal reading lines and the fingerprint identification driving chip, and sequentially controlling the fingerprint identification units in the jth row of the fingerprint identification area to output first fingerprint identification signals through the fingerprint signal reading lines; wherein j is a positive integer less than or equal to M;

determining a row where the fingerprint identification area in the contact area is located according to the first fingerprint identification signal;

sequentially controlling each multiplexer circuit to conduct the fingerprint signal reading lines electrically connected with at least one row of fingerprint identification units in the central area of each fingerprint identification area with the fingerprint identification driving chip, and simultaneously conducting the fingerprint signal reading lines electrically connected with different multiplexer circuits with the fingerprint identification driving chip,

and controlling at least one fingerprint identification unit of the central area of each fingerprint identification area of the row of each fingerprint identification area in the contact area to output a second fingerprint identification signal through the fingerprint signal reading line;

and determining the column of the fingerprint identification area in the contact area according to the second fingerprint identification signal.

12. The fingerprint recognition method of claim 11, wherein when N is an odd number; the sequentially controlling the multiplexer circuit to electrically connect the fingerprint signal reading line with the fingerprint identification driving chip with at least one column of the fingerprint identification units in the central area of each fingerprint identification area comprises:

and sequentially controlling the multiplexer circuit to electrically connect the fingerprint signal reading line with the fingerprint identification driving chip in the N rows of fingerprint identification units in each fingerprint identification area and the middle row of fingerprint identification units.

13. The fingerprint recognition method of claim 11, wherein when N is an even number; sequentially controlling the multiplexer circuit to electrically connect the fingerprint signal reading line with the fingerprint identification driving chip in at least one row of the fingerprint identification units in the central area of each fingerprint identification area, and the method comprises the following steps:

and sequentially controlling the multiplexer circuit to electrically connect the fingerprint signal reading line with the fingerprint identification driving chip in the N rows of fingerprint identification units and the two middle rows of fingerprint identification units in each fingerprint identification area.

14. The fingerprint recognition method of claim 10, wherein each fingerprint recognition period comprises a first display period and a second display period;

the first display period comprises a display stage and a position identification stage; the second display period comprises a display stage and a fingerprint identification stage;

the display stage is used for displaying a frame of picture;

the position identification stage is used for determining the position of a contact area of a finger and the display panel;

the fingerprint identification stage is used for acquiring fingerprint identification signals output by the fingerprint identification units in the fingerprint identification area in the contact area.

15. The fingerprint identification method according to claim 10, wherein each fingerprint identification area of the display area is further provided with a plurality of touch electrodes arranged in an array;

the determining the position of the contact area of the finger and the display panel comprises the following steps:

acquiring touch signals of the touch electrodes in the fingerprint identification areas;

and determining the row and the column of the fingerprint identification area in the contact area of the finger and the display panel according to the touch signal.

16. A display device, comprising: the display panel according to any one of claims 1 to 9; and the display panel adopts the fingerprint identification method of any one of claims 10 to 15 to carry out fingerprint identification.