Fingerprint recognition panel and display device

Abstract

The present invention discloses a fingerprint recognition panel and a display device, comprising a plurality of fingerprint recognition circuits (U(n, k)) arranged in a matrix, a plurality of read signal lines (OUT(k)), a gate drive circuit (100), and a plurality of scan lines (SM(n)) connected to the gate drive circuit (100); the gate drive circuit (100) is used to sequentially output scan signals to the scan lines (SM(n)); each of the fingerprint recognition circuits (U(n, k)) is respectively connected to two different scan lines, a read control terminal (SW(n)) of the fingerprint recognition circuit (U(n, k)) is connected to a first scan line, and a fingerprint recognition circuit (SW(n)) is connected to a second scan line. The reset control terminal (RST(n)) of the identification circuit (U(n,k)) is connected to the second scan line; the first scan line corresponding to the connection of the fingerprint identification circuit (U(n,k)) in the nth row and the second scan line corresponding to the connection of the fingerprint identification circuit (U(n‑m,k)) in the n‑mth row are the same scan line; or the second scan line corresponding to the connection of the fingerprint identification circuit (U(n,k)) in the nth row and the first scan line corresponding to the connection of the fingerprint identification circuit (U(n‑m,k)) in the n‑mth row are the same scan line; n and m are positive integers; N is the total number of rows of the fingerprint identification circuit (U(n,k)); 1<n≤N, m<n.

Description

Technical Field

[0001] The present disclosure relates to the field of touch technology, and in particular to a fingerprint recognition panel and a display device. Background Art

[0002] In recent years, with the rapid development of touch technology, mobile products with biometric functions have gradually entered people's lives and work. Fingerprint technology has attracted much attention due to its unique identity characteristics. Press-type and sliding-type fingerprint recognition technologies based on silicon-based processes have been integrated into mobile products. In the future, the focus of people's attention will be on fingerprint recognition technology in the display area.

[0003] At present, fingerprint recognition technology mainly uses photoelectric sensors to collect fingerprint images. However, the existing technology has the problem of large signal-to-noise ratio in fingerprint recognition. Summary of the invention

[0004] The present disclosure provides a fingerprint recognition panel and a display device, and the specific scheme is as follows:

[0005] A fingerprint recognition panel provided by an embodiment of the present disclosure includes a plurality of fingerprint recognition circuits arranged in a matrix, a plurality of read signal lines, a gate drive circuit, and a plurality of scan lines connected to the gate drive circuit; the fingerprint recognition circuit includes a reset module, a photoelectric conversion module, a drive transistor, and a read control module;

[0006] The gate driving circuit is used to sequentially output scanning signals to the plurality of scanning lines;

[0007] In the fingerprint recognition circuit, the reset module is respectively connected to the reset control terminal, the reset signal terminal and the gate of the driving transistor, and is used to provide the signal of the reset signal terminal to the gate of the driving transistor under the control of the reset control terminal; the photoelectric conversion module is connected to the gate of the driving transistor, and is used to convert the optical signal into an electrical signal; the source of the driving transistor is connected to the reference voltage terminal, and the drain of the driving transistor is connected to the reading control module, and is used to output a signal to the reading control module under the control of its gate potential; the reading control module is respectively connected to the reading control terminal, the signal output terminal and the drain of the driving transistor, and is used to provide the signal output by the driving transistor to the signal output terminal under the control of the reading control terminal;

[0008] Each row of the fingerprint recognition circuits is connected to two different scan lines respectively, wherein the read control end of the read control module is connected to the first scan line, and the reset control end of the reset module is connected to the second scan line; the signal output ends of the fingerprint recognition circuits in the same column are connected to one of the read signal lines respectively;

[0009] The first scan line corresponding to the fingerprint recognition circuit in the nth row and the second scan line corresponding to the fingerprint recognition circuit in the nmth row are the same scan line; or, the second scan line corresponding to the fingerprint recognition circuit in the nth row and the first scan line corresponding to the fingerprint recognition circuit in the nmth row are the same scan line; n is a positive integer greater than 1 and less than or equal to N; N is the total number of rows of the fingerprint recognition circuit and is greater than 1; m is a positive integer less than n.

[0010] Optionally, in the fingerprint recognition panel, m=1.

[0011] Optionally, the read control module includes a first switch transistor;

[0012] The first electrode of the first switch transistor is connected to the drain of the driving transistor; the gate of the first switch transistor is connected to the read control terminal; and the second electrode of the first switch transistor is connected to the signal output terminal.

[0013] Optionally, the photoelectric conversion module includes a capacitor and a photodiode, wherein a cathode of the photodiode is connected to a gate of the driving transistor, and the capacitor is connected in parallel to the photodiode.

[0014] Optionally, the reset module includes a second switching transistor; wherein the first electrode of the second switching transistor is connected to the reset signal terminal, the second electrode of the second switching transistor is connected to the gate of the driving transistor; and the gate of the second switching transistor is connected to the reset control terminal.

[0015] Optionally, the fingerprint recognition panel further includes a plurality of reset signal lines and a plurality of reference voltage lines;

[0016] The reset signal end of each row of the fingerprint recognition circuit or the reset signal end of each column of the fingerprint recognition circuit is respectively connected to one of the reset signal lines;

[0017] The reference voltage end of each row of the fingerprint recognition circuits or the reference voltage end of each column of the fingerprint recognition circuits is connected to a corresponding reference voltage line.

[0018] Optionally, the reset signal end of each row of the fingerprint recognition circuits is respectively connected to one of the reset signal lines;

[0019] The reset signal line and the scan line both extend along the row direction;

[0020] The reset signal line and the scan line are arranged in the same layer and with the same material.

[0021] Optionally, the reset signal end of each column of the fingerprint recognition circuit is respectively connected to one of the reset signal lines;

[0022] The reset signal line and the read signal line both extend along the column direction;

[0023] The reset signal line and the read signal line are arranged in the same layer and with the same material.

[0024] Optionally, the reference voltage terminals of each row of the fingerprint recognition circuits are respectively connected to one of the reference voltage lines;

[0025] The reference voltage line and the scan line both extend along the row direction;

[0026] The reference voltage line and the scan line are arranged in the same layer and the same material.

[0027] Optionally, the reference voltage terminal of each column of the fingerprint recognition circuit is respectively connected to one of the reference voltage lines;

[0028] The reference voltage line and the read signal line both extend along the column direction;

[0029] The reference voltage line and the read signal line are arranged in the same layer and the same material.

[0030] Correspondingly, the present disclosure also provides a display device comprising any one of the above-mentioned fingerprint recognition panels. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a cascade diagram of a fingerprint recognition circuit in the related art;

[0032] Figure 2 for Figure 1 The timing diagram corresponding to the fingerprint recognition circuit shown;

[0033] Figure 3 One of the structural schematic diagrams of the fingerprint recognition panel provided in the embodiment of the present disclosure;

[0034] Figure 4 The second structural schematic diagram of the fingerprint recognition panel provided in the embodiment of the present disclosure;

[0035] Figure 5 One of the schematic diagrams of the cascade structure of the fingerprint recognition circuit in the fingerprint recognition panel provided by the embodiment of the present disclosure;

[0036] Figure 6 The second schematic diagram of the cascade structure of the fingerprint recognition circuit in the fingerprint recognition panel provided by the embodiment of the present disclosure;

[0037] Figure 7 for Figure 5 The timing diagram corresponding to the fingerprint recognition panel shown;

[0038] Figure 8for Figure 6 The timing diagram corresponding to the fingerprint recognition panel shown;

[0039] Fig. 9 A schematic diagram of the structure of a fingerprint recognition circuit in a fingerprint recognition panel provided by an embodiment of the present disclosure;

[0040] Fig.10 The third structural schematic diagram of the fingerprint recognition panel provided by the embodiment of the present disclosure;

[0041] Fig.11 The fourth structural schematic diagram of the fingerprint recognition panel provided in the embodiment of the present disclosure;

[0042] Fig.12 The fifth structural diagram of the fingerprint recognition panel provided in the embodiment of the present disclosure;

[0043] Fig.13 This is the sixth structural schematic diagram of the fingerprint recognition panel provided in the embodiment of the present disclosure. DETAILED DESCRIPTION

[0044] In related technologies, such as Figure 1 As shown, the fingerprint recognition panel includes multiple rows of fingerprint recognition circuits 10, and the fingerprint recognition circuit 10 includes a read control module 11, a photoelectric conversion module 12, a driving transistor TQ and a reset module 13. The control end of the reset module 13 of all fingerprint recognition circuits U is connected to the same reset control line RSTL, and the control end of the read control module 11 of the fingerprint recognition circuit 10 in the nth row is correspondingly connected to a read control scanning line SW(n). Wherein n is a positive integer less than or equal to the total number of rows of the fingerprint recognition panel. When the fingerprint recognition panel is working, the corresponding timing diagram is as follows Figure 2 As shown, in the reset stage, the reset control RSTL controls the reset modules 13 of all fingerprint recognition circuits 10 to reset the gate potential of the driving transistor. In the signal reading stage, under the control of the reading control scan line SW(n), the reading control module 11 of the fingerprint recognition circuit 10 is controlled line by line to output the signal corresponding to the output of the driving transistor TQ. Among them, the size of the signal output by the driving transistor TQ in the fingerprint recognition circuit 10 is determined by its gate potential, and the gate potential of the driving transistor is determined by the photoelectric conversion module. When the fingerprint touches the fingerprint recognition panel, the valley and ridge of the fingerprint block the light to different degrees, resulting in different sizes of the electrical signals converted by the photoelectric conversion module, which in turn leads to different gate potentials of the driving transistor.

[0045] However, in the above fingerprint recognition panel, since the exposure time of the photoelectric conversion modules 11 in different rows of fingerprint recognition circuits is different, the brightness of the collected fingerprint image is uneven, which affects the accuracy of fingerprint recognition.

[0046] Based on this, the present disclosure provides a fingerprint recognition panel and a display device to solve the problem that the brightness and clarity of the collected fingerprint image are different, which affects the recognition ability of the fingerprint recognition chip.

[0047] In order to make the above-mentioned purposes, features and advantages of the present disclosure more obvious and easy to understand, the present disclosure will be further described below with reference to the accompanying drawings and examples. However, the example embodiments can be implemented in various forms and should not be understood as being limited to the embodiments described herein; on the contrary, these embodiments are provided to make the present disclosure more comprehensive and complete, and to fully convey the concepts of the example embodiments to those skilled in the art. The same figure marks in the figures represent the same or similar structures, and thus their repeated descriptions will be omitted. The words expressing position and direction described in the present disclosure are all explained using the accompanying drawings as examples, but changes can be made as needed, and the changes made are all included in the scope of protection of the present disclosure. The drawings of the present disclosure are only used to illustrate the relative position relationship and do not represent the true proportion.

[0048] It should be noted that specific details are described in the following description to facilitate a full understanding of the present disclosure. However, the present disclosure can be implemented in a variety of other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present disclosure. Therefore, the present disclosure is not limited to the specific implementation methods disclosed below. The subsequent description of the specification is a preferred implementation method for implementing the present application, but the description is for the purpose of illustrating the general principles of the present application and is not intended to limit the scope of the present application. The scope of protection of the present application shall be determined by the definition of the attached claims.

[0049] The fingerprint recognition panel and the display device provided by the embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0050] The present disclosure provides a fingerprint recognition panel, taking the case of m=1 as an example, such as Figures 3 to 6 As shown, it includes a plurality of fingerprint recognition circuits U(n,k) arranged in a matrix (where n is the row number of the fingerprint recognition circuit, and k is the column number of the fingerprint recognition circuit), a plurality of read signal lines OUT(k), a gate drive circuit 100, and a plurality of scan lines SM(n) connected to the gate drive circuit 100; the fingerprint recognition circuit U includes a reset module 03, a photoelectric conversion module 02, a drive transistor TQ, and a read control module 01. Wherein; n is a positive integer greater than 1 and less than or equal to N; N is the total number of rows of the fingerprint recognition circuit, and is greater than 1; k is a positive integer less than or equal to the total number of columns of the fingerprint recognition circuit.

[0051] The gate driving circuit 1 is used to output scanning signals to the plurality of scanning lines SM(n) in sequence.

[0052] In the fingerprint recognition circuit U(n,k), the reset module 03 is respectively connected to the reset control terminal RST(n), the reset signal terminal VIN(n,k) and the gate of the driving transistor TQ, and is used to provide the signal of the reset signal terminal VIN(n,k) to the gate TQ of the driving transistor under the control of the reset control terminal RST(n); the photoelectric conversion module 02 is connected to the gate of the driving transistor TQ and the bias voltage terminal VSS, and is used to convert the optical signal into an electrical signal; the source of the driving transistor TQ is connected to the reference voltage terminal VDD(n,k), and the drain of the driving transistor TQ is connected to the reading control module 01, and is used to output a signal to the reading control module 01 under the control of its gate potential; the reading control module 01 is respectively connected to the reading control terminal SW(n), the signal output terminal SOUT(n,k) and the drain of the driving transistor TQ, and is used to provide the signal output by the driving transistor TQ to the signal output terminal under the control of the reading control terminal 01.

[0053] Each row of the fingerprint recognition circuits U(n, k) is connected to two different scanning lines SM respectively, and the signal output terminals SOUT(n, k) of the fingerprint recognition circuits in the same column are connected to one of the read signal lines OUT(k) respectively. Figure 5 and Figure 6 As shown, the read control terminal SW(n) of the read control module 01 is connected to the first scan line, and the reset control terminal RST(n) of the reset module 03 is connected to the second scan line.

[0054] Specifically, Figure 3 and Figure 5 As shown in FIG. 1 , the second scan line connected to the reset control terminal RST(n) of the fingerprint recognition circuit U(n, k) in the nth row and the first scan line connected to the read control terminal SW(n-1) of the fingerprint recognition circuit U(n-1, k) in the n-1th row are the same scan line SM(n). The corresponding timing diagram is shown in FIG. Figure 7As shown, in the reset phase, the gate drive circuit sequentially outputs scan signals to the scan lines SM(1), SM(2), ..., SM(n), SM(n+1), SM(n+2), ..., SM(N+1). When the gate drive circuit 100 outputs a scan signal to the scan line SM(n), the reset module 03 of the fingerprint recognition circuit U(n, k) in the nth row resets the drive transistor TQ under the control of the scan line SM(n). In the signal reading phase, the gate drive circuit 100 sequentially outputs scan signals to the scan lines SM(1), SM(2) ... SM(n), SM(n+1), SM(n+2) ... SM(N+1). When the gate drive circuit outputs a scan signal to the scan line SM(n+1), the read control module 01 of the fingerprint recognition circuit U(n, k) in the nth row outputs a signal to the signal output terminal SOUT(n) under the control of the scan line SM(n).

[0055] Thus, in the above-mentioned fingerprint recognition panel provided in the embodiment of the present application, each row of the fingerprint recognition circuits is respectively connected to two different scan lines, wherein the reset control terminal of each row of the fingerprint recognition circuits is respectively connected to a second scan line, and the read control terminal of each row of the fingerprint recognition circuits is respectively connected to a first scan line. Thus, the reset control modules in each row of the fingerprint recognition circuits in the fingerprint recognition panel are in a cascade relationship, and the read control modules in each row of the fingerprint recognition circuits are in a cascade relationship. Thus, the exposure time of each row of the fingerprint recognition circuits in the fingerprint recognition panel is the same, ensuring that the brightness and clarity of the fingerprint images collected in each row are consistent. Moreover, the second scan line corresponding to the reset control terminal of the fingerprint recognition circuit in the nth row and the first scan line corresponding to the read control terminal of the fingerprint recognition circuit in the n-1th row are set to the same scan line, so that only one gate drive circuit is needed to realize reset and read, without adding an additional gate drive circuit, which is conducive to narrow frame design.

[0056] Or, if Figure 4 and Figure 6 As shown in FIG. 1 , the first scan line connected to the read control terminal SW(n) of the fingerprint recognition circuit U(n,k) in the nth row and the second scan line connected to the reset control terminal RST(n-1) of the fingerprint recognition circuit U(n-1,k) in the n-1th row are the same scan line SM(n). The corresponding timing diagram is shown in FIG. Figure 8 As shown, in the reset phase, the gate drive circuit sequentially outputs scan signals to the scan lines SM(1), SM(2), ..., SM(n-1), SM(n), SM(n+1), ..., SM(N+1). The corresponding timing diagram is shown in Figure 8As shown, when the gate drive circuit 100 outputs a scan signal to the scan line SM(n+1), the reset module 03 of the fingerprint recognition circuit U(n,k) in the nth row resets the driving transistor TQ under the control of the scan line SM(n). In the signal reading stage, the gate drive circuit sequentially outputs scan signals to the scan lines SM(1), SM(2), ..., SM(n-1), SM(n), SM(n+1), ..., SM(N+1). When the gate drive circuit 100 outputs a scan signal to the scan line SM(n), the read control module 01 of the fingerprint recognition circuit U(n,k) in the nth row outputs a signal to the signal output terminal SOUT(n) under the control of the scan line SM(n).

[0057] Thus, in the above-mentioned fingerprint recognition panel provided in the embodiment of the present application, each row of the fingerprint recognition circuits is respectively connected to two different scan lines, wherein the reset control terminal of each row of the fingerprint recognition circuits is respectively connected to a second scan line, and the read control terminal of each row of the fingerprint recognition circuits is respectively connected to a first scan line. Thus, the reset control modules in each row of the fingerprint recognition circuits in the fingerprint recognition panel are in a cascade relationship, and the read control modules in each row of the fingerprint recognition circuits are in a cascade relationship. Thus, the exposure time of each row of the fingerprint recognition circuits in the fingerprint recognition panel is the same, ensuring that the brightness and clarity of the fingerprint images collected in each row are consistent. Moreover, the first scan line corresponding to the read control terminal of the fingerprint recognition circuit in the nth row and the second scan line corresponding to the reset control terminal of the fingerprint recognition circuit in the n-1th row are set to the same scan line, so that only one gate drive circuit is needed to achieve reset and read, without adding an additional gate drive circuit, which is conducive to narrow frame design.

[0058] It should be noted that in this application, Figures 4 to 6 All of them are illustrated by taking m=1 as an example. In specific implementation, m can be any integer greater than 1 and less than N. However, the larger the m, the more rows need to be crossed during cascading, and the more scan lines are required. Therefore, in the fingerprint recognition panel provided by the embodiment of the present disclosure, the smaller the value of m, the simpler the overall structure of the fingerprint recognition panel.

[0059] Optionally, in the fingerprint recognition panel provided by the embodiment of the present disclosure, m=1. In this way, each row of fingerprint recognition circuits is cascaded with the fingerprint recognition circuits in the adjacent row. In addition, the number of scan lines required is only one row more than the number of rows of fingerprint recognition circuits. Thus, the overall structure of the fingerprint recognition panel is as simple as possible.

[0060] Optionally, in the fingerprint recognition panel of the present application, as Fig. 9As shown, the read control module 01 includes a first switch transistor T1. The first electrode of the first switch transistor T1 is connected to the drain of the driving transistor TQ; the gate of the first switch transistor T1 is connected to the read control terminal SW(n); and the second electrode of the first switch transistor is connected to the signal output terminal SOUT(n).

[0061] Specifically, in the signal reading stage, when the first scanning line provides a scanning signal, the first switching transistor T1 is turned on, so that the fingerprint recognition circuit U(n,k) outputs an electrical signal of the fingerprint image to the signal output terminal SOUT(n). In this way, by using a switching transistor as the reading control module, the circuit is simplified and the production cost is reduced.

[0062] Optionally, in the fingerprint recognition panel of the present application, as Fig. 9 As shown, the photoelectric conversion module 02 includes a capacitor C and a photodiode L, wherein the capacitor C is connected in parallel with the photodiode L, the cathode of the photodiode L is connected to the gate of the driving transistor TQ, and the anode of the photodiode L is connected to the bias voltage terminal VSS.

[0063] Specifically, when the reset module 03 is reset under the control of the second scan line, the capacitor C is charged. After that, the reset module 03 stops resetting, the capacitor C discharges, and drives the photodiode L. When a finger is pressed on the fingerprint recognition panel, due to the uneven fingerprint of the finger, the light intensity of the light signal obtained by the fingerprint recognition panel at each fingerprint recognition circuit is different, and the resistance of the photodiode L changes under the influence of light signals of different light intensities, thereby affecting the change of the current in the circuit of the capacitor C and the photodiode L. Since the drain current of the driving transistor TQ is in a corresponding correlation with the gate current, the current in the circuit of the capacitor C and the photodiode L ultimately affects the drain current of the driving transistor TQ, so that the drain current is input into the reading control module 01 as a fingerprint image signal. In this way, the fingerprint recognition panel converts the optical signal into an electrical signal, which is convenient for the subsequent circuit to process the signal.

[0064] Optionally, in the fingerprint recognition panel of the present application, as Fig. 9 As shown, the reset module 03 includes a second switch transistor T2; wherein the second electrode of the second switch transistor T2 is connected to the gate of the driving transistor TQ; and the gate of the second switch transistor T2 is connected to the reset control terminal RST(n).

[0065] Specifically, when the reset control terminal RST(n) connected to the gate of the second switch transistor provides a scan signal, the second switch transistor T2 is turned on, and the fingerprint recognition circuit U(n,k) is reset; when the reset control terminal RST(n) removes the scan signal, the second switch transistor T2 is turned off, and the fingerprint recognition circuit U(n,k) stops resetting. In this way, by using a switch transistor as the reset module, the circuit is simplified and the production cost is reduced.

[0066] Optionally, it further includes a plurality of reset signal lines and a plurality of reference voltage lines;

[0067] The reset signal end of each row of the fingerprint recognition circuit or the reset signal end of each column of the fingerprint recognition circuit is respectively connected to one of the reset signal lines;

[0068] The reference voltage end of each row of the fingerprint recognition circuits or the reference voltage end of each column of the fingerprint recognition circuits is connected to a corresponding reference voltage line.

[0069] In this way, by multiplexing the reset signal line and the reference voltage line, the structure of the fingerprint recognition panel is simplified and the difficulty of production is reduced.

[0070] In the fingerprint recognition panel of this application, the following will be Figure 4 The structure of the fingerprint recognition panel shown is used as an example for explanation, but is not limited to this.

[0071] Alternatively, if Fig.10 As shown, the reset signal terminal VIN(n,k) of each row of the fingerprint recognition circuits U(n,k) is respectively connected to a corresponding reset signal line VINL(n);

[0072] The reset signal line VINL and the scan line SM both extend along the row direction;

[0073] The reset signal line VINL and the scan line setting SM are made of the same layer and the same material.

[0074] In this way, the reset signal end of the fingerprint recognition circuit in the same line is connected to the same reset signal line, and the reset signal line and the scan line are set to the same layer and the same material, which simplifies the structure of the fingerprint recognition panel, simplifies the production process, and reduces the production cost.

[0075] Alternatively, if Fig.11 As shown, the reset signal terminal VIN(n,k) of each column of the fingerprint recognition circuit U(n,k) is respectively connected to a corresponding reset signal line VINL(k);

[0076] The reset signal line VINL and the read signal line OUT both extend along the column direction;

[0077] The reset signal line VINL and the read signal line OUT are arranged in the same layer and the same material.

[0078] In this way, the reset signal end of the fingerprint recognition circuit in the same column is connected to the same reset signal line, and the reset signal line and the scan line are set to the same layer and the same material, which simplifies the structure of the fingerprint recognition panel, simplifies the production process, and reduces the production cost.

[0079] Alternatively, if Fig.12 As shown, the reference voltage terminal VDD(n,k) of each row of the fingerprint recognition circuits U(n,k) is respectively connected to a corresponding reference voltage line VDDL(n);

[0080] The reference voltage line VDDL and the scan line SM both extend along the row direction;

[0081] The reference voltage line VDDL and the scan line SM are configured to be in the same layer and made of the same material.

[0082] In this way, by connecting the reference voltage ends of the fingerprint recognition circuits in the same line to the same reference voltage line, and setting the reference voltage line and the scanning line to the same layer and the same material, the structure of the fingerprint recognition panel is simplified, the production process is simplified, and the production cost is reduced.

[0083] Alternatively, if Fig.13 As shown, the reference voltage terminal VDD(n,k) of each column of the fingerprint recognition circuit U(n,k) is respectively connected to a corresponding reference voltage line VDDL(k);

[0084] The reference voltage line VDDL and the read signal line OUT both extend along the column direction;

[0085] The reference voltage line VDDL and the read signal line OUT are configured to be in the same layer and material.

[0086] In this way, by connecting the reference voltage ends of the fingerprint recognition circuits in the same column to the same reference voltage line, and setting the reference voltage line and the scan line to the same layer and material, the structure of the fingerprint recognition panel is simplified, the production process is simplified, and the production cost is reduced.

[0087] Based on the same inventive concept, the embodiment of the present disclosure also provides a display device, including any of the above-mentioned fingerprint recognition panels provided by the embodiment of the present disclosure. The display device can be any product or component with a display function, such as a mobile phone, a tablet computer, a laptop computer, etc. The implementation of the display device can refer to the above-mentioned embodiment of the display panel, and the repeated parts will not be repeated.

[0088] The disclosed embodiment provides a fingerprint recognition panel and a display device, wherein the reset module of the fingerprint recognition circuit arranged in a matrix in the fingerprint recognition panel is connected to the read control module of the fingerprint recognition circuit separated by several rows through the same signal scanning line to form a cascade structure. The signal scanning line is controlled by scanning the gate driving circuit on the panel row by row in the reset stage and the signal reading stage, so that the reset modules and read control modules of all the fingerprint recognition circuits work row by row, so that the fingerprint recognition panel has the same exposure time for the fingerprint image of each row, and all the fingerprint recognition circuits have the same exposure time for the fingerprint image, thereby improving the uniformity of the brightness and clarity of the fingerprint signal, which is conducive to the fingerprint recognition chip to more quickly and accurately recognize the fingerprint image signal.

[0089] Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is also intended to include these modifications and variations.

Claims

1. A fingerprint recognition panel, wherein: It includes a plurality of fingerprint recognition circuits arranged in a matrix, a plurality of read signal lines, a gate drive circuit, and a plurality of scan lines connected to the gate drive circuit; the fingerprint recognition circuit includes a reset module, a photoelectric conversion module, a drive transistor, and a read control module; The gate driving circuit is used to sequentially output scanning signals to the plurality of scanning lines; In the fingerprint recognition circuit, the reset module is connected to the reset control terminal, the reset signal terminal and the gate of the driving transistor respectively, and is used to provide the signal of the reset signal terminal to the gate of the driving transistor under the control of the reset control terminal; The photoelectric conversion module is connected to the gate of the driving transistor, and is used to convert the optical signal into an electrical signal; the source of the driving transistor is connected to the reference voltage terminal, and the drain of the driving transistor is connected to the reading control module, and is used to output a signal to the reading control module under the control of its gate potential; The read control module is connected to the read control terminal, the signal output terminal and the drain of the driving transistor respectively, and is used to provide the signal output by the driving transistor to the signal output terminal under the control of the read control terminal; Each row of the fingerprint recognition circuits is connected to two different scan lines respectively, wherein the read control end of the read control module is connected to the first scan line, and the reset control end of the reset module is connected to the second scan line; the signal output end of the fingerprint recognition circuit in each column is connected to one of the read signal lines respectively; The first scan line corresponding to the fingerprint recognition circuit in the nth row and the second scan line corresponding to the fingerprint recognition circuit in the nmth row are the same scan line; or, the second scan line corresponding to the fingerprint recognition circuit in the nth row and the first scan line corresponding to the fingerprint recognition circuit in the nmth row are the same scan line; n is a positive integer greater than 1 and less than or equal to N; N is the total number of rows of the fingerprint recognition circuit and is greater than 1; m is a positive integer less than n.

2. The fingerprint recognition panel according to claim 1, wherein: m＝1。 3. The fingerprint recognition panel according to claim 1, wherein: The read control module includes a first switch transistor; wherein: The first electrode of the first switch transistor is connected to the drain of the driving transistor, the gate of the first switch transistor is connected to the reading control terminal, and the second electrode of the first switch transistor is connected to the signal output terminal.

4. The fingerprint recognition panel according to claim 1, wherein: The photoelectric conversion module includes a capacitor and a photodiode; wherein: The cathode of the photodiode is connected to the gate of the driving transistor, and the capacitor is connected in parallel with the photodiode.

5. The fingerprint recognition panel according to claim 1, wherein: The reset module includes a second switch transistor; wherein: The first electrode of the second switch transistor is connected to the reset signal terminal, the second electrode of the second switch transistor is connected to the gate of the drive transistor; and the gate of the second switch transistor is connected to the reset control terminal.

6. The fingerprint recognition panel according to claim 1, wherein: Also includes a plurality of reset signal lines and a plurality of reference voltage lines; The reset signal end of each row of the fingerprint recognition circuit or the reset signal end of each column of the fingerprint recognition circuit is respectively connected to one of the reset signal lines; The reference voltage end of each row of the fingerprint recognition circuits or the reference voltage end of each column of the fingerprint recognition circuits is connected to a corresponding reference voltage line.

7. The fingerprint recognition panel according to claim 6, wherein: The reset signal end of each row of the fingerprint recognition circuits is respectively connected to one of the reset signal lines; The reset signal line and the scan line both extend along the row direction; The reset signal line and the scan line are arranged in the same layer and with the same material.

8. The fingerprint recognition panel according to claim 6, wherein: The reset signal end of each column of the fingerprint recognition circuit is respectively connected to one of the reset signal lines; The reset signal line and the read signal line both extend along the column direction; The reset signal line and the read signal line are arranged in the same layer and with the same material.

9. The fingerprint recognition panel according to claim 6, wherein: The reference voltage terminals of the fingerprint recognition circuits in each row are respectively connected to one of the reference voltage lines; The reference voltage line and the scan line both extend along the row direction; The reference voltage line and the scan line are arranged in the same layer and the same material.

10. The fingerprint recognition panel according to claim 6, wherein: The reference voltage end of each column of the fingerprint recognition circuit is respectively connected to a corresponding reference voltage line; The reference voltage line and the read signal line both extend along the column direction; The reference voltage line and the read signal line are arranged in the same layer and the same material.

11. A display device, wherein: Comprising a fingerprint recognition panel as described in any one of claims 1-10.

Images