Display panel and display device

Abstract

The present invention discloses a display panel and a display device. The display panel includes a pixel circuit and a fingerprint detection circuit. The pixel circuit is used to drive a light-emitting device to emit light based on signals provided by a scan line, a data line, an initialization signal line, a first power supply, and a second power supply. The fingerprint detection circuit is used to reset the photosensitive device based on signals input from a reset signal control terminal and a reset signal input terminal, and output a fingerprint detection signal through a signal output terminal. The reset signal control terminal is connected to a reset control signal line or a scan line, and / or the reset signal input terminal is connected to a reset signal line or an initialization signal line or a scan line, and / or the power terminal is connected to a third power line or a first power supply or a scan line, and / or the signal output terminal is connected to a signal reading line or a data line. The signal lines connected to the fingerprint detection circuit are multiplexed with the signal lines connected to the pixel circuit to implement fingerprint detection within the screen, saving the type and number of signal lines and simplifying the display panel structure.

Description

Technical Field

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

[0002] With the development of science and technology, more and more electronic devices with display functions are widely used in people's daily life and work, bringing great convenience to people's daily life and work, and becoming an indispensable tool for people today. The main component of electronic devices to realize the display function is the display panel.

[0003] To meet people's ever-increasing functional demands, electronic devices generally have fingerprint detection capabilities. Currently, fingerprint detection is typically achieved by installing a corresponding module under the screen. However, with the promotion of flexible curved and foldable screens, under-screen fingerprint detection is difficult to apply to curved and foldable screens. Summary of the Invention

[0004] The present invention provides a display panel and a display device, which can realize fingerprint detection in the screen, save the types and number of signal lines, and simplify the display panel structure.

[0005] According to one aspect of the present invention, there is provided a display panel comprising: a pixel circuit and a fingerprint detection circuit, wherein the pixel circuit comprises a light emitting device;

[0006] The pixel circuit is connected to the scan line, the data line, the initialization signal line, the first power supply, and the second power supply respectively, and is used to drive the light-emitting device to emit light based on the signals provided by the scan line, the data line, the initialization signal line, the first power supply, and the second power supply;

[0007] The fingerprint detection circuit includes a reset signal control terminal, a reset signal input terminal, a power supply terminal, a signal output terminal, and a photosensitive device. The fingerprint detection circuit is used to reset the photosensitive device based on the signals input from the reset signal control terminal and the reset signal input terminal, and output a fingerprint detection signal through the signal output terminal;

[0008] The reset signal control terminal is connected to the reset control signal line or the scan line.

[0009] and / or, the reset signal input terminal is connected to the reset signal line or the initialization signal line or the scan line,

[0010] and / or, the power supply end is connected to a third power line or the first power supply or the scan line,

[0011] And / or, the signal output end is connected to the signal reading line or the data line.

[0012] Optionally, the fingerprint detection circuit further includes a reset module and a signal output module, wherein the reset module is used to reset the photosensitive device and the signal output module based on the signals of the reset signal control terminal and the reset signal input terminal, and the signal output module is used to generate and output the fingerprint detection signal based on the signals of the reset signal control terminal, the reset signal input terminal, the power supply terminal, and the light-sensing state of the photosensitive device;

[0013] The pixel circuit also includes a data writing module, a driving module and an initialization module. The scan lines include a first scan line, a second scan line and / or a third scan line. The data writing module is connected to the data line and the first scan line. The data writing module is used to transmit the data voltage output by the data line to the control end of the driving module. The initialization module is connected to the initialization signal line, the second scan line and / or the third scan line. The initialization module is used to initialize the control end of the driving module and / or the light-emitting device. The driving module and the light-emitting device are connected between the first power supply and the second power supply. The driving module is used to generate a driving current according to the data voltage to drive the light-emitting device to emit light.

[0014] Optionally, the pixel circuit further includes a light emitting control module and a compensation module, the scan line further includes a light emitting control signal line and a fourth scan line, the light emitting control module is connected to the light emitting control signal line, and the light emitting control module, the driving module, and the light emitting device are connected between the first power supply and the second power supply;

[0015] The compensation module is connected to the fourth scan line, and the compensation module is connected between the first end and the control end of the driving module. The compensation module is used to perform threshold compensation on the driving module based on the signal on the fourth scan line; optionally, the first end of the photosensitive device is connected to the reset module, and the second end of the photosensitive device is connected to the light-emitting control signal line.

[0016] Optionally, the reset module includes a reset transistor, a first electrode of the reset transistor serves as the reset signal input terminal, a second electrode of the reset transistor is connected to the signal output module and the photosensitive device respectively, a gate of the reset transistor serves as the reset signal control terminal, and a first electrode of the reset transistor is connected to the initialization signal line or the first power supply;

[0017] Optionally, the gate of the reset transistor is connected to the first scan line, the second scan line, the third scan line, the fourth scan line, or the light emitting control signal line.

[0018] Optionally, the reset module includes a reset transistor, a first electrode of the reset transistor serves as the reset signal input terminal, a second electrode of the reset transistor is connected to the signal output module and the photosensitive device respectively, a gate of the reset transistor serves as the reset signal control terminal, and a first electrode of the reset transistor is connected to the light-emitting control signal line;

[0019] Optionally, the gate of the reset transistor is connected to the first scan line, the second scan line, the third scan line, or the fourth scan line.

[0020] Optionally, the first end of the photosensitive device is connected to the reset module, and the second end of the photosensitive device is connected to the first power supply or the second power supply or the initialization signal line.

[0021] Optionally, the signal output module includes a signal acquisition transistor and an output transistor, the first electrode of the signal acquisition transistor serves as the power supply terminal, the second electrode of the signal acquisition transistor is connected to the first electrode of the output transistor, the gate of the signal acquisition transistor is connected to the reset module, the gate of the output transistor is connected to the output control signal line or the first scan line or the second scan line or the third scan line, and the second electrode of the output transistor serves as the signal output terminal;

[0022] Optionally, the first electrode of the signal acquisition transistor is connected to the first power supply.

[0023] Optionally, the signal output module includes a signal acquisition transistor and an output transistor, the first electrode of the signal acquisition transistor serves as the power supply terminal, the second electrode of the signal acquisition transistor is connected to the first electrode of the output transistor, the gate of the signal acquisition transistor is connected to the reset module, and the gate of the output transistor is connected to the fourth scan line;

[0024] Optionally, the first electrode of the signal acquisition transistor is connected to the light emitting control signal line.

[0025] Optionally, the second electrode of the output transistor is connected to the data line, and the display panel further includes a time-sharing control circuit, which is used to provide data voltage to the data line and read the fingerprint detection signal in a time-sharing manner based on a first time-sharing control signal and a second time-sharing control signal.

[0026] Optionally, the time-sharing control circuit includes: a first time-sharing control transistor and a second time-sharing control transistor, wherein the first electrode of the first time-sharing control transistor is connected to the second electrode of the output transistor, the second electrode of the first time-sharing control transistor is connected to the fingerprint driver chip, and the gate of the first time-sharing control transistor is connected to a first time-sharing control signal line, and the first time-sharing control signal line is used to provide the first time-sharing control signal;

[0027] The first electrode of the second time-sharing control transistor is connected to the second electrode of the output transistor, the second electrode of the second time-sharing control transistor is connected to the display driver chip, the gate of the second time-sharing control transistor is connected to the second time-sharing control signal line, and the second time-sharing control signal line is used to provide the second time-sharing control signal.

[0028] According to another aspect of the present invention, a display device is provided, comprising any one of the display panels described above.

[0029] A display panel provided by an embodiment of the present invention includes a pixel circuit and a fingerprint detection circuit. The pixel circuit includes a light-emitting device. The pixel circuit is respectively connected to a scan line, a data line, an initialization signal line, a first power supply, and a second power supply. The pixel circuit is configured to drive the light-emitting device to emit light based on signals provided by the scan line, the data line, the initialization signal line, the first power supply, and the second power supply. The fingerprint detection circuit includes a reset signal control terminal, a reset signal input terminal, a power supply terminal, a signal output terminal, and a photosensitive device. The fingerprint detection circuit is configured to reset the photosensitive device based on signals input from the reset signal control terminal and the reset signal input terminal, and output a fingerprint detection signal via the signal output terminal. The reset signal control terminal is connected to the reset control signal line or the scan line, and / or the reset signal input terminal is connected to the reset signal line or the initialization signal line or the scan line, and / or the power supply terminal is connected to the third power supply line or the first power supply or the scan line, and / or the signal output terminal is connected to the signal reading line or the data line. The signal lines connected to the fingerprint detection circuit are multiplexed with the signal lines connected to the pixel circuit, thereby achieving a fingerprint detection function while driving the display panel. Due to the multiplexing of signal lines, the number of signal lines can be saved and the structure of the display panel can be simplified. Moreover, the fingerprint detection circuit and the pixel circuit are both arranged in the display area of ​​the display panel, thereby realizing the function of in-screen fingerprint detection. The display panel can be suitable for curved screens and folding screens, and is more applicable.

[0030] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 is a structural schematic diagram of a display panel provided by an embodiment of the present invention;

[0033] Figure 2 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0034] Figure 3 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0035] Figure 4 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0036] Figure 5 This is a driving timing diagram of a display panel provided by an embodiment of the present invention;

[0037] Figure 6 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0038] Figure 7 is another driving timing diagram of a display panel provided by an embodiment of the present invention;

[0039] Figure 8 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0040] Figure 9 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0041] Figure 10 1 is a schematic structural diagram of a fingerprint detection circuit provided by an embodiment of the present invention;

[0042] Figure 11 is a structural diagram of another fingerprint detection circuit provided by an embodiment of the present invention;

[0043] Figure 12 is a structural diagram of another fingerprint detection circuit provided by an embodiment of the present invention;

[0044] Figure 13 is a structural diagram of another fingerprint detection circuit provided by an embodiment of the present invention;

[0045] Figure 14is a structural diagram of another fingerprint detection circuit provided by an embodiment of the present invention;

[0046] Figure 15 is a structural diagram of another fingerprint detection circuit provided by an embodiment of the present invention;

[0047] Figure 16 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0048] Figure 17 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0049] Figure 18 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0050] Figure 19 is another driving timing diagram of a display panel provided by an embodiment of the present invention;

[0051] Figure 20 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0052] Figure 21 is another driving timing diagram of a display panel provided by an embodiment of the present invention;

[0053] Figure 22 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0054] Figure 23 is another driving timing diagram of a display panel provided by an embodiment of the present invention;

[0055] Figure 24 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0056] Figure 25 is another driving timing diagram of a display panel provided by an embodiment of the present invention;

[0057] Figure 26 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0058] Figure 27 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0059] Figure 28 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0060] Figure 29 is another driving timing diagram of a display panel provided by an embodiment of the present invention;

[0061] Figure 30 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0062] Figure 31 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0063] Figure 32 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0064] Figure 33 is another driving timing diagram of a display panel provided by an embodiment of the present invention;

[0065] Figure 34 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0066] Figure 35 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0067] Figure 36 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0068] Figure 37 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0069] Figure 38 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0070] Figure 39 is another driving timing diagram of a display panel provided by an embodiment of the present invention;

[0071] Figure 40 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0072] Figure 41 is a structural diagram of another display panel provided by an embodiment of the present invention;

[0073] Figure 42 is another driving timing diagram of a display panel provided by an embodiment of the present invention;

[0074] Figure 43 It is a structural schematic diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0075] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0076] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0077] As described in the background technology, under-screen fingerprint detection technology is not suitable for curved screens and folding screens. The inventors have found that under-screen fingerprint detection refers to configuring / attaching the fingerprint detection circuit below (on the back) the display panel, and the fingerprint detection circuit detects the fingerprint image through the display panel. In the under-screen fingerprint detection technology, the fingerprint detection circuit is configured on the outside of the display panel. After the display panel and the fingerprint detection circuit are superimposed on each other, the total thickness increases. For curved screens and folding screens, the thickness requirements are more stringent and the thickness should be smaller. Therefore, under-screen fingerprint detection technology is no longer applicable to curved screens and folding screens.

[0078] In order to solve the above technical problems, the present invention provides a display panel. Figure 1 A schematic diagram of the structure of a display panel provided by an embodiment of the present invention, referring to Figure 1 The display panel 6 includes: a pixel circuit 1 and a fingerprint detection circuit 2, and the pixel circuit 1 includes a light-emitting device.

[0079] The pixel circuit 1 is respectively connected to the scan line S, the data line Vdata, the initialization signal line Vref, the first power supply Vdd, and the second power supply Vss. The pixel circuit 1 is used to drive the light-emitting device to emit light based on the signals provided by the scan line S, the data line Vdata, the initialization signal line Vref, the first power supply Vdd, and the second power supply Vss.

[0080] The fingerprint detection circuit 2 includes a reset signal control terminal RS, a reset signal input terminal IN, a power supply terminal VC, a signal output terminal OUT, and a photosensitive device. The fingerprint detection circuit 2 is used to reset the photosensitive device based on the signals input from the reset signal control terminal RS and the reset signal input terminal IN, and output a fingerprint detection signal through the signal output terminal OUT.

[0081] The reset signal control terminal RS is connected to the reset control signal line Rest or the scan line S.

[0082] And / or, the reset signal input terminal IN is connected to the reset signal line Vrst or the initialization signal line Vref or the scan line S,

[0083] and / or, the power supply terminal VC is connected to the third power supply line Vdds or the first power supply Vdd or the scan line S,

[0084] And / or, the signal output terminal OUT is connected to the signal read line Rout or the data line Vdata.

[0085] The scan line S may include at least one signal line, for example, a scan line that controls the writing of the initialization voltage provided by the initialization signal line Vref into the light-emitting device, and may also include a scan line that controls the writing of the data voltage provided by the data line Vdata into the pixel circuit, and may also include a scan line that controls the formation of a path between the first power supply Vdd, the light-emitting device, and the second power supply Vss. This embodiment does not specifically limit this.

[0086] In this embodiment, both the pixel circuit 1 and the fingerprint detection circuit 2 can be arranged in the display area, so that the display panel 6 can realize fingerprint recognition while realizing display. The light-emitting device of the pixel circuit 1 provides a light source for the photosensitive device. Different fingerprints reflect the light emitted by the light-emitting device differently, so that the light intensity received by the photosensitive device is different. The photosensitive device outputs different signals when receiving different light intensities, and then the fingerprint detection circuit 2 outputs different fingerprint detection signals to realize fingerprint detection. Exemplarily, the fingerprint detection signal can be a current signal. The reset signal control terminal RS, the reset signal input terminal IN, the power supply terminal VC, and the signal output terminal OUT can all be connected to separate signal lines, or reuse the signal lines connected to the pixel circuit 1. When the fingerprint detection circuit 2 and the pixel circuit 1 reuse the signal lines, the number and types of signals required for realizing light control and fingerprint recognition can be reduced, the driving method can be simplified, and the structure of the display panel 6 can be simplified, reducing costs. It is worth noting that one pixel circuit 1 drives one sub-pixel to emit light. Multiple pixel circuits 1 corresponding to multiple sub-pixels in the display panel can share one fingerprint detection circuit 2. For example, the three sub-pixels included in a pixel can correspond to one fingerprint detection circuit 2, or a column of sub-pixels can correspond to one fingerprint detection circuit 2. In other words, multiple pixel circuits 1 correspond to one fingerprint detection circuit 2.

[0087] The signal lines connecting the fingerprint detection circuit and the pixel circuit are reused, enabling simultaneous fingerprint detection while driving the display panel. This reuse of signal lines saves signal lines and simplifies the display panel structure. Furthermore, both the fingerprint detection circuit and the pixel circuit are located within the display panel's display area, enabling in-screen fingerprint detection. This makes the display panel suitable for curved and foldable screens, offering greater applicability.

[0088] Figure 2 A schematic diagram of another display panel structure provided by an embodiment of the present invention, referring to Figure 2 Optionally, the fingerprint detection circuit 2 further includes a reset module 21 and a signal output module 22. The reset module 21 is used to reset the photosensitive device 23 and the signal output module 22 based on the signal of the reset signal control terminal RS and the reset signal input terminal IN. The signal output module 22 is used to generate and output a fingerprint detection signal based on the signal of the reset signal control terminal RS, the reset signal input terminal IN, the power supply terminal VC and the photosensitivity state of the photosensitive device 23.

[0089] The pixel circuit 1 also includes a data writing module 11, a driving module 12 and an initialization module 13. The scan lines include a first scan line S1, a second scan line S2 and / or a third scan line S3. The data writing module 11 is connected to the data line Vdata and the first scan line S1. The data writing module 11 is used to transmit the data voltage output by the data line Vdata to the control end of the driving module 12. The initialization module 13 is connected to the initialization signal line Vref, the second scan line S2 and / or the third scan line S3. The initialization module 13 is used to initialize the control end of the driving module 12 and / or the light-emitting device 14. The driving module 12 and the light-emitting device 14 are connected between the first power supply Vdd and the second power supply Vss. The driving module 12 is used to generate a driving current according to the data voltage to drive the light-emitting device 14 to emit light.

[0090] In this embodiment, the first end of the photosensitive device 23 is connected to the reset module 21, and the other end is connected to the fourth power supply Vcom. The reset module 21 resets the photosensitive device 23 and the signal output module 22 based on signals from the reset signal control terminal RS and the reset signal input terminal IN. Specifically, when the signal input to the reset signal control terminal RS is valid, the reset module 21 transmits the voltage input from the reset signal input terminal IN to the first end of the photosensitive device 23 and the signal output module 22 to reset the photosensitive device 23 and the signal output module 22. When the reset signal control terminal RS is valid, the reset signal input terminal IN is connected to the photosensitive device 23 and the signal output module 22. In different touch conditions (i.e., different fingerprints), the light intensity received by the photosensitive device 23 varies, resulting in different currents. This in turn causes the signal output module 22 to generate different fingerprint detection signals based on the different currents. The light-sensing state of the photosensitive device 23 can change based on changes in the received light intensity.

[0091] In this embodiment, three scan lines are shown, including a first scan line S1, a second scan line S2, and a third scan line S3. When the second and third scan lines S2 and S3 are valid signals, the initialization module 13 transmits the initialization voltage provided by the initialization signal line Vref to the control terminal of the driver module 12 and the first terminal of the light-emitting device 14. The second terminal of the light-emitting device 14 is connected to the second power supply Vss. When the first scan line S1 is valid, the data writing module 11 transmits the data voltage provided by the data line Vdata to the control terminal of the driver module 12 to write the data voltage. The driver module 12 generates a driving current based on the data voltage to drive the light-emitting device 14 to emit light.

[0092] In this embodiment, the signal line connected to the reset signal control terminal RS is multiplexed with the initialization signal line Vref. This means that while the pixel circuit 1 is initializing the driver module 12 and the light-emitting device 14, the fingerprint detection circuit 2 simultaneously resets the photosensitive device 23. For example, after the photosensitive device 23 is reset, the fingerprint detection signal can be output during the light-emitting phase of the light-emitting device 14. Sharing signal lines between the fingerprint detection circuit 2 and the pixel circuit 1 reduces the number and types of signals required for light-emitting control and fingerprint recognition, simplifies the driving method, and simplifies the display panel structure, reducing costs.

[0093] Figure 3 A schematic diagram of another display panel structure provided by an embodiment of the present invention, referring to Figure 3Optionally, the pixel circuit 1 also includes a light-emitting control module 15 and a compensation module 16, the scan line also includes a light-emitting control signal line EM and a fourth scan line S4, the light-emitting control module 15 is connected to the light-emitting control signal line EM, and the light-emitting control module 15, the driving module 12 and the light-emitting device 14 are connected between the first power supply Vdd and the second power supply Vss.

[0094] The compensation module 16 is connected to the fourth scan line S4 . The compensation module 16 is connected between the first terminal and the control terminal of the driving module 12 . The compensation module 16 is configured to perform threshold compensation on the driving module 12 based on the signal on the fourth scan line S4 .

[0095] Optionally, the light-emitting control module 15 includes a first light-emitting control module 151 and a second light-emitting control module 152, the first light-emitting control module 151 is connected between the second end of the driving module 12 and the first power supply Vdd, and the second light-emitting control module 152 is connected between the first end of the driving module 12 and the second power supply Vss. The light-emitting control module 15 is used to connect the paths between the first power supply Vdd, the driving module 12, the light-emitting device 14 and the second power supply Vss when the light-emitting control signal line EM is a valid signal.

[0096] Optionally, the first end of the data writing module 11 is connected to the data line Vdata, the other end of the data writing module 11 is connected to the second end of the driving module 12, the first end of the initialization module 13 is connected to the initialization signal line Vref, the second end of the initialization module 13 is connected to the control end of the driving module 12, and the third end of the initialization module 13 is connected to the first end of the light-emitting device 14.

[0097] Optionally, the pixel circuit 1 further includes a storage module 17 , which is connected to the control terminal of the driving module 12 and is used to store the voltage of the control terminal of the driving module 12 .

[0098] Figure 3 The reset signal input terminal IN and the power supply terminal VC of the reset module 21 are both connected to the first power supply Vdd, the reset signal control terminal RS of the reset module 21 is connected to the light control signal line EM, the second terminal of the photosensitive device 23 is connected to the second power supply Vss, and the signal output terminal OUT of the signal output module 22 is connected to the data line Vdata. In order to facilitate the description of the working process of the display panel, this embodiment exemplarily shows Figure 3 A specific structure of the display panel shown, Figure 4 A schematic diagram of another display panel structure provided by an embodiment of the present invention, referring to Figure 3 and 4Optionally, the reset module 21 includes a reset transistor Tr, the first electrode of which serves as the reset signal input terminal IN, the second electrode of which is connected to the signal output module 22 and the photosensitive device 23 respectively, the gate of which serves as the reset signal control terminal RS, and the first electrode of which is connected to the initialization signal line Vref or the first power supply Vdd. Optionally, the gate of the reset transistor Tr is connected to the first scan line S1, the second scan line S2, the third scan line S3, the fourth scan line S4, or the light control signal line EM. To illustrate a specific structure of the fingerprint detection circuit 2, in this embodiment, the signal output module 22 includes a signal reading transistor Ts and an output transistor Tf. The gate of the signal reading transistor Ts is connected to the second electrode of the reset transistor Tr, the first electrode of the signal reading transistor Ts serves as the power supply terminal VC, the second electrode of the signal reading transistor Ts is connected to the first electrode of the output transistor Tf, the second electrode of the output transistor Tf serves as the signal output terminal OUT, and the gate of the output transistor Tf is connected to the signal output control line Select. Optionally, the driving module 12 includes a first transistor T1, the compensation module 16 includes a second transistor T2, the data writing module 11 includes a third transistor T3, the initialization module 13 includes a fourth transistor T4 and a fifth transistor T5, the first light-emitting control module 151 includes a sixth transistor T6, the second light-emitting control module 152 includes a seventh transistor T7, and the storage module 17 includes a storage capacitor Cst. A first electrode of the third transistor T3 is connected to the data line Vdata, a second electrode of the third transistor T3 is connected to the first electrode of the first transistor T1, a gate of the third transistor T3 is connected to the first scan line S1, a first electrode of the second transistor T2 is connected to the second electrode of the first transistor T1, a second electrode of the second transistor T2 is connected to the gate of the first transistor T1, and a gate of the second transistor T2 is connected to the fourth scan line S4. A first electrode of the fourth transistor T4 is connected to the initialization signal line Vref, a second electrode of the fourth transistor T4 is connected to the gate of the first transistor T1, and a gate of the fourth transistor T4 is connected to the second scan line S1. The first electrode of the fifth transistor T5 is connected to the initialization signal line Vref, the second electrode of the fifth transistor T5 is connected to the first end of the light emitting device 14, the gate of the fifth transistor T5 is connected to the third scan line S3, the first electrode of the sixth transistor T6 is connected to the first power supply Vdd, the second electrode of the sixth transistor T6 is connected to the first electrode of the first transistor T1, the first electrode of the seventh transistor T7 is connected to the second electrode of the first transistor T1, the second electrode of the seventh transistor T7 is connected to the first end of the light emitting device 14, and the gates of the sixth transistor T6 and the seventh transistor T7 are both connected to the light emitting control signal line EM.

[0099] Figure 5 A driving timing diagram of a display panel provided by an embodiment of the present invention, Figure 5 The timing diagram shown applies to Figure 4 The display panel shown, and exemplary, Figure 5 In the embodiment, the first transistor T1, the third transistor T3, the sixth transistor T6, and the seventh transistor T7 are low-temperature polysilicon transistors, and further, all are P-type transistors. The second transistor T2, the fourth transistor T4, the fifth transistor T5, the reset transistor Tr, the signal reading transistor Ts, and the output transistor Tf are all oxide transistors, and further, all are N-type transistors. Exemplarily, the signals on the third scan line S3 and the second scan line S2 are the same. The operation process of the display panel includes an initialization phase t1, a data writing phase t2, a light emitting phase t3, a reset phase t4, a signal generation phase t5, and a signal output phase t6.

[0100] During initialization phase t1, the signals on the second scan line S2 and the third scan line S3 are high, the signal on the first scan line S1 is high, the signal on the light-emitting control signal line EM is high, and the signals on the fourth scan line S4 and the signal output control line Select are low. The second transistor T2, the third transistor T3, the sixth transistor T6, the seventh transistor T7, and the output transistor Tf are all off, while the fourth transistor T4, the fifth transistor T5, and the reset transistor Tr are turned on. The turned-on fourth transistor T4 writes the initialization voltage provided by the initialization signal line Vref to the gate of the first transistor T1, and the turned-on fifth transistor T5 writes the initialization voltage provided by the initialization signal line Vref to the first terminal of the light-emitting device 14, thereby preventing residual charge at the first terminal of the light-emitting device 14 from affecting the brightness of the light. Simultaneously, during initialization phase t1, the turned-on reset transistor Tr transmits the voltage provided by the first power supply Vdd to the first terminal of the photosensitive device 23, resetting the photosensitive device 23.

[0101] During the data writing phase t2, the signals on the first scan line S1, the second scan line S2, the third scan line S3, and the signal output control line Select are low, while the signals on the fourth scan line S4 and the light-emitting control signal line EM are high. The fourth transistor T4, the fifth transistor T5, the sixth transistor T6, the seventh transistor T7, and the output transistor Tf are all turned off, while the second transistor T2, the third transistor T3, and the reset transistor Tr are turned on. The turned-on second transistor T2 and third transistor T3 write the data voltage provided by the data line Vdata into the gate of the first transistor T1, and at the same time, associate the gate voltage of the first transistor T1 with the threshold voltage of the first transistor T1, thereby implementing data voltage writing and threshold voltage compensation for the first transistor T1. Simultaneously, during the data writing phase t2, the photosensitive device 23 continues to be reset.

[0102] In this embodiment, the reset phase t4 coincides with the time period when the light emitting control signal line EM is at a high level, that is, during the non-light emitting phase of the pixel circuit, the fingerprint detection circuit is resetting the photosensitive device 23 .

[0103] In the light-emitting stage t3 (the signal generation stage t5 and the signal output stage t6 are within the light-emitting stage), the signal on the first scan line S1 is at a high level, the signals on the fourth scan line S4, the second scan line S2, the third scan line S3 and the light-emitting control signal line EM are all at a low level, the second transistor T2, the third transistor T3, the fourth transistor T4 and the fifth transistor T5 are turned off, the sixth transistor T6 and the seventh transistor T7 are turned on, and the first transistor T1 generates a driving current according to its gate voltage and the voltage provided by the first power supply Vdd to drive the light-emitting device 14 to emit light.

[0104] During signal generation phase t5, the signal on the light-emitting control signal line EM is low, the signal on the signal output control line Select is low, and both the reset transistor Tr and the output transistor Tf are turned off. The light-emitting device 14 is used to provide light to the photosensitive device 23. Fingerprints consist of valleys and ridges, and different fingerprints reflect light differently, resulting in different light intensities received by the photosensitive device 23, and thus different charges accumulated at the first terminal of the photosensitive device 23.

[0105] In the signal output stage t6, the signal on the light-emitting control signal line EM is at a low level, the signal on the signal output control line Select is at a high level, the reset transistor Tr is turned off, the output transistor Tf is turned on, and the signal reading transistor Ts generates different fingerprint detection signals according to different voltages on its gate, and outputs the fingerprint detection signals through the turned-on output transistor Tf and the data line Vdata to complete the fingerprint detection.

[0106] It is worth noting that when the display panel is displaying, each frame of the display includes an initialization stage t1, a data writing stage t2 and a light-emitting stage t3, while the display process of the display panel only includes a reset stage t4, a signal generation stage t5 and a signal output stage t6, that is, only one fingerprint recognition is required.

[0107] In this embodiment, multiple signal lines are shared, which can greatly save the number and types of signals in the display panel while realizing the fingerprint detection function, simplify the structure of the display panel, and reduce costs.

[0108] Figure 6 A schematic diagram of another display panel structure provided by an embodiment of the present invention, referring to Figure 6 Optionally, a first end of the photosensitive device 23 is connected to the reset module 21, and a second end of the photosensitive device 23 is connected to the first power supply Vdd or the second power supply Vss or the initialization signal line Vref. Figure 7 Another driving timing diagram of a display panel provided by an embodiment of the present invention is shown in FIG. Figure 7 The drive timing shown is applicable to Figure 6 The display panel shown. Figure 6 The pixel circuit shown is Figure 4 The difference between the pixel circuit shown is that Figure 6 The second transistor T2, the fourth transistor T4, the fifth transistor T5, the reset transistor Tr, the signal reading transistor Ts and the output transistor Tf are all low-temperature polysilicon transistors, and further, they are all P-type transistors. The second end of the photosensitive device 23 is connected to the first power supply Vdd, the gate of the reset transistor Tr (reset signal control terminal RS) is connected to the reset control signal line Rest, the first electrode of the reset transistor Tr (reset signal input terminal IN) is connected to the reset signal line Vrst, the first electrode of the signal reading transistor Ts (power supply terminal VC) is connected to the third power supply Vdds, and the output transistor Tf (signal output terminal OUT) is connected to the signal reading line Rout.

[0109] refer to Figure 6 and Figure 7 The working process of the display panel includes an initialization phase t1, a data writing phase t2, a light emitting phase t3, a reset phase t4, a signal generating phase t5 and a signal output phase t6.

[0110] During the initialization phase t1, the signals on the second scan line S2 and the third scan line S3 are at a low level, and the signals on the first scan line S1, the fourth scan line S4, the light-emitting control signal line EM, the reset signal line Rest, and the signal output control line Select are all at a high level. The second transistor T2, the third transistor T3, the sixth transistor T6, the seventh transistor T7, the reset transistor Tr, the signal reading transistor Ts, and the output transistor Tf are all turned off, while the fourth transistor T4 and the fifth transistor T5 are turned on. The turned-on fourth transistor T4 writes the initialization voltage provided by the initialization signal line Vref into the gate of the first transistor T1, and the turned-on fifth transistor T5 writes the initialization voltage provided by the initialization signal line Vref into the first terminal of the light-emitting device 14, thereby preventing the residual charge at the first terminal of the light-emitting device 14 from affecting the light-emitting brightness.

[0111] During the data writing phase t2, the signals on the first scan line S1 and the fourth scan line S4 are low, while the signals on the second scan line S2, the third scan line S3, the emission control signal line EM, the reset signal line Rest, and the signal output control line Select are all high. The fourth transistor T4, the fifth transistor T5, the sixth transistor T6, the seventh transistor T7, the reset transistor Tr, the signal reading transistor Ts, and the output transistor Tf are all turned off, while the second transistor T2 and the third transistor T3 are turned on. The turned-on second transistor T2 and third transistor T3 write the data voltage provided by the data line Vdata into the gate of the first transistor T1, and at the same time, associate the gate voltage of the first transistor T1 with the threshold voltage of the first transistor T1, thereby implementing data voltage writing and threshold voltage compensation for the first transistor T1.

[0112] The reset phase t4, signal generation phase t5, and signal output phase t6 are all within the light-emitting phase t3. Throughout the light-emitting phase t3, the signals on the first scan line S1, the fourth scan line S4, the second scan line S2, and the third scan line S3 are at a high level, and the signal on the light-emission control signal line EM is at a low level. The second transistor T2, the third transistor T3, the fourth transistor T4, and the fifth transistor T5 are turned off, while the sixth transistor T6 and the seventh transistor T7 are turned on. The first transistor T1 generates a drive current based on its gate voltage and the voltage provided by the first power supply Vdd, driving the light-emitting device 14 to emit light.

[0113] During reset phase t4, the signal on the reset control signal line Rest is low, the signal on the signal output control line Select is high, the reset transistor Tr is turned on, and the output transistor Tf is turned off. The turned-on reset transistor Tr outputs the reset voltage transmitted by the reset signal line Vrst to the first terminal of the photosensitive device 23 and the gate of the signal reading transistor Ts, completing the voltage reset of the photosensitive device 23 and the signal reading transistor Ts, thus preventing the residual charge from the previous fingerprint detection from affecting the current fingerprint detection result.

[0114] During signal generation phase t5, the signal on the reset control signal line Rest is high, the signal on the signal output control line Select is high, and both the reset transistor Tr and the output transistor Tf are turned off. Light-emitting device 14 is used to provide illumination for photosensitive device 23. Fingerprints consist of valleys and ridges, and different fingerprints reflect light differently, resulting in different light intensities received by photosensitive device 23 and, in turn, different charges accumulated at the first terminal of photosensitive device 23.

[0115] In the signal output stage t6, the signal on the reset control signal line Rest is at a high level and the signal on the signal output control line Select is at a low level. The reset transistor Tr is turned off and the output transistor Tf is turned on. The signal reading transistor Ts generates different fingerprint detection signals according to different gate voltages and outputs the fingerprint detection signals through the turned-on output transistor Tf to complete the fingerprint detection.

[0116] In this embodiment, the second end of the photosensitive device 23 reuses the first power supply Vdd of the pixel circuit, which can save the number of power supplies in the display panel and further simplify the structure of the display panel.

[0117] Figure 8 A schematic structural diagram of another display panel provided by an embodiment of the present invention, Figure 8 and Figure 6 The difference is that Figure 8 The second end of the middle photosensitive device 23 multiplexes the second power supply Vss of the pixel circuit. Figure 7 The timing diagram shown also applies to Figure 8 , Figure 8 The working process of the display panel is Figure 6 The same, no longer repeated here.

[0118] Figure 9 A schematic diagram of another display panel structure provided by an embodiment of the present invention, referring to Figure 9 Optionally, a first end of the photosensitive device 23 is connected to the reset module 21, and a second end of the photosensitive device 23 is connected to the light emitting control signal line EM. Figure 9 and Figure 6 The difference is that Figure 9 The second end of the middle photosensitive device 23 multiplexes the light emitting control signal line EM of the pixel circuit. Figure 7 The timing diagram shown also applies to Figure 9 , Figure 9 The working process of the display panel is Figure 6 The same, no longer repeated here.

[0119] In order to solve the problem of leakage current in the pixel circuit, the current pixel circuit is designed as an LTPO circuit, that is, the transistors included in the compensation module and the initialization module connected to the control terminal of the driving module are all oxide transistors, so as to reduce the leakage current in the circuit. For the LTPO pixel circuit, the fingerprint detection circuit can have various forms. This embodiment shows six specific fingerprint detection circuits that are compatible with the LTPO circuit. For details, please refer to Figure 10-15 . Figure 10 In the embodiment, the reset transistor Tr, the signal reading transistor Ts and the output transistor Tf are all low-temperature polysilicon transistors. Furthermore, the reset transistor Tr, the signal reading transistor Ts and the output transistor Tf are all P-type transistors. Figure 11 In the embodiment, the reset transistor Tr and the output transistor Tf are both oxide transistors, and the signal reading transistor Ts is a low-temperature polysilicon transistor. Furthermore, the reset transistor Tr and the output transistor Tf are N-type transistors, and the signal reading transistor Ts is a P-type transistor. Figure 12 In the embodiment, the reset transistor Tr is an oxide transistor, the signal reading transistor Ts and the output transistor Tf are both low-temperature polysilicon transistors. Furthermore, the reset transistor Tr is an N-type transistor, and the signal reading transistor Ts and the output transistor Tf are both P-type transistors. Figure 13 In the embodiment, the reset transistor Tr and the signal reading transistor Ts are both oxide transistors, and the output transistor Tf is both low-temperature polysilicon transistors. Furthermore, the reset transistor Tr and the signal reading transistor Ts are both N-type transistors, and the output transistor Tf is a P-type transistor. Figure 14 In the embodiment, the reset transistor Tr, the signal reading transistor Ts and the output transistor Tf are all oxide transistors. Furthermore, the reset transistor Tr, the signal reading transistor Ts and the output transistor Tf are all N-type transistors, and the first electrode of the reset transistor Tr is connected to the first electrode of the signal reading transistor Ts. Figure 15 In the embodiment, the reset transistor Tr, the signal reading transistor Ts and the output transistor Tf are all oxide transistors. Furthermore, the reset transistor Tr, the signal reading transistor Ts and the output transistor Tf are all N-type transistors. Figure 10-15 Any of the fingerprint detection circuits shown can be combined with the LTPO pixel circuit to achieve display and fingerprint detection of the display panel.

[0120] For the case where the second end of the photosensitive device is multiplexed with one of the first power supply, the second power supply, the initialization signal line and the light emitting control signal line in the pixel circuit, if the pixel circuit is an LTPO pixel circuit, you can select Figure 10-15 Any one of the fingerprint detection circuits can be combined with the pixel circuit to realize display control and fingerprint detection of the display panel. Moreover, since the leakage current of the LTPO pixel circuit is small, it is beneficial to improve the uniformity of the display.

[0121] Figure 16 A schematic structural diagram of another display panel provided by an embodiment of the present invention, Figure 16 and Figure 6 The difference is that the second end of the photosensitive device 23 is connected to the fourth power supply Vcom, the first electrode of the reset transistor Tr (reset signal input terminal IN) reuses the initialization signal line Vref of the pixel circuit, and the initialization voltage on the initialization signal line Vref is used as the reset voltage of the photosensitive device 23 and the signal reading transistor Ts. The other structures are the same as Figure 6 Same as, and the working principle is also the same Figure 6The fingerprint detection circuit can save the types and number of signals, simplify the structure of the display panel, and reduce costs by multiplexing the initialization signal line Vref in the pixel circuit.

[0122] Figure 17 A schematic diagram of another display panel structure provided by an embodiment of the present invention, referring to Figure 17 Optionally, the first electrode of the reset transistor Tr is connected to the light emitting control signal line EM. Figure 17 and Figure 6 The difference is that the second end of the photosensitive device 23 is connected to the fourth power supply Vcom, the first electrode of the reset transistor Tr is multiplexed with the light emitting control signal line EM of the pixel circuit, and the voltage on the light emitting control signal line EM is used as the reset voltage of the photosensitive device 23 and the signal reading transistor Ts. The other structures are the same as Figure 6 Same as, and the working principle is also the same Figure 6 The fingerprint detection circuit can save the types and number of signals, simplify the structure of the display panel, and reduce costs by multiplexing the fingerprint detection circuit with the light emission control signal line EM in the pixel circuit.

[0123] Figure 18 A schematic diagram of another display panel structure provided by an embodiment of the present invention, referring to Figure 18 Optionally, the gate of the reset transistor Tr is connected to the first scan line S1 or the second scan line S2 or the third scan line S3 or the fourth scan line S4.

[0124] Figure 18 and Figure 6 The difference is that the second end of the photosensitive device 23 is connected to the fourth power supply Vcom, and the gate of the reset transistor Tr is connected to the second scan line S2. Figure 6 The same is true, and this embodiment will not be described again here. Figure 19 Another driving timing diagram of a display panel provided by an embodiment of the present invention is shown in FIG. Figure 19 The timing diagram shown is applicable to Figure 18 The display panel shown.

[0125] In this embodiment, after the gate of the reset transistor Tr reuses the second scan line S2, the initialization phase t1 and the reset phase t4 overlap. During the initialization phase t1 / reset phase t4, the signals on the second scan line S2 and the third scan line S3 are low, and the signals on the first scan line S1, the fourth scan line S4, the light-emitting control signal line EM, and the signal output control line Select are all high. The second transistor T2, the third transistor T3, the sixth transistor T6, the seventh transistor T7, and the output transistor Tf are all turned off, and the fourth transistor T4, the fifth transistor T5, and the reset transistor Tr are turned on. The turned-on fourth transistor T4 writes the initialization voltage provided by the initialization signal line Vref into the gate of the first transistor T1, and the turned-on fifth transistor T5 writes the initialization voltage provided by the initialization signal line Vref into the first end of the light-emitting device 14, thereby preventing the residual charge at the first end of the light-emitting device 14 from affecting the light-emitting brightness. The turned-on reset transistor Tr outputs the reset voltage transmitted by the reset signal line Vrst to the first terminal of the photosensitive device 23 and the gate of the signal reading transistor Ts, completing the voltage reset of the photosensitive device 23 and the signal reading transistor Ts, thereby preventing the residual charge from the previous fingerprint detection from affecting the fingerprint detection result of this time. The working process of the data writing stage t2, the light emitting stage t3, the signal generating stage t5 and the signal output stage t6 is the same as Figure 6 The processes of the structure shown are the same and will not be described again. The signal generating phase t5 and the signal output phase t6 are located within the light emitting phase t3.

[0126] Figure 20 A schematic diagram of another display panel structure provided by an embodiment of the present invention, referring to Figure 20 , Figure 20 and Figure 6 The difference is that the second end of the photosensitive device 23 is connected to the fourth power supply Vcom, and the gate of the reset transistor Tr reuses the third scan line S3. Figure 6 The same is true, and this embodiment will not be described again here. Figure 21 Another driving timing diagram of a display panel provided by an embodiment of the present invention is shown in FIG. Figure 21 The timing diagram shown is applicable to Figure 20 The pixel circuit shown. Figure 20 In the structure shown, the signals on the second scan line S2 and the third scan line S3 are different. The operation process of the display panel includes a first initialization phase t11, a data writing phase t2, a second initialization phase t12, a light-emitting phase t3, a reset phase t4, a signal generation phase t5, and a signal output phase t6.

[0127] In the first initialization phase t11, the signal on the second scan line S2 is at a low level, and the signals on the first scan line S1, the fourth scan line S4, the third scan line S3, the light-emitting control signal line EM, and the signal output control line Select are all at a high level. The second transistor T2, the third transistor T3, the fifth transistor T5, the sixth transistor T6, the seventh transistor T7, the reset transistor Tr, the signal reading transistor Ts, and the output transistor Tf are all turned off, and the fourth transistor T4 is turned on. The turned-on fourth transistor T4 writes the initialization voltage provided by the initialization signal line Vref into the gate of the first transistor T1.

[0128] Data writing phase t2 and Figure 6 The working process of the structure shown is the same and will not be repeated here.

[0129] Because the gate of the reset transistor Tr reuses the third scan line S3, the second initialization phase t12 and the reset phase t4 overlap. During the second initialization phase t12 / reset phase t4, the signals on the first scan line S1, the second scan line S2, the fourth scan line S4, the light-emission control signal line EM, and the signal output control line Select are all high, while the signal on the third scan line S3 is low. The second transistor T2, the third transistor T3, the fourth transistor T4, the sixth transistor T6, the seventh transistor T7, and the output transistor Tf are all off. The fifth transistor T5 and the reset transistor Tr are turned on. The turned-on fifth transistor T5 writes the initialization voltage to the first terminal of the light-emitting device 14. The turned-on reset transistor Tr writes the reset voltage on the reset signal line Vrst to the first terminal of the photosensitive device 23 and the gate of the signal reading transistor Ts. That is, when the first terminal of the light-emitting device 14 is initialized, the photosensitive device 23 is simultaneously reset.

[0130] The light-emitting phase t3, the signal generating phase t5 and the signal output phase t6 are Figure 6 The process of the structure shown is the same and will not be repeated here.

[0131] Figure 22 A schematic diagram of another display panel structure provided by an embodiment of the present invention, referring to Figure 22 Optionally, the gate of the reset transistor Tr is connected to the fourth scan line S4. Figure 22 The fourth scan line S4 has the same signal as the first scan line S1. Figure 22 and Figure 6 The difference is that the second end of the photosensitive device 23 is connected to the fourth power supply Vcom, and the gate of the reset transistor Tr reuses the fourth scan line S4. Figure 6 The same is true, and this embodiment will not be described again here. Figure 23 Another driving timing diagram of a display panel provided by an embodiment of the present invention is shown in FIG. Figure 23 The timing diagram shown is applicable to Figure 22 The display panel shown.

[0132] In this embodiment, after the gate of the reset transistor Tr reuses the fourth scan line S4, the data writing phase t2 and the reset phase t4 overlap. During the data writing phase t2 / reset phase t4, the signals on the first scan line S1 and the fourth scan line S4 are low, and the signals on the second scan line S2, the third scan line S3, the light-emitting control signal line EM, and the signal output control line Select are all high. The fourth transistor T4, the fifth transistor T5, the sixth transistor T6, the seventh transistor T7, and the output transistor Tf are all turned off, and the second transistor T2, the third transistor T3, and the reset transistor Tr are turned on. The turned-on second transistor T2 and the third transistor T3 write the data voltage provided by the data line Vdata into the gate of the first transistor T1, and at the same time, associate the gate voltage of the first transistor T1 with the threshold voltage of the first transistor T1, thereby achieving data voltage writing and threshold voltage compensation for the first transistor T1. The turned-on reset transistor Tr outputs the reset voltage transmitted by the reset signal line Vrst to the first terminal of the photosensitive device 23 and the gate of the signal reading transistor Ts, completing the voltage reset of the photosensitive device 23 and the signal reading transistor Ts, thereby avoiding the influence of the residual charge from the previous fingerprint detection on the fingerprint detection result of this time. The working process of the initialization phase t1, the light emitting phase t3, the signal generation phase t5 and the signal output phase t6 is the same as Figure 6 The processes of the structure shown are the same and will not be described again. The signal generating phase t5 and the signal output phase t6 are located within the light emitting phase t3.

[0133] In the case where the gate of the reset transistor Tr reuses the second scan line S2, the pixel circuit of the display panel may also be an LTPO pixel circuit. Figure 24 A schematic diagram of another display panel structure provided by an embodiment of the present invention, referring to Figure 24 The first transistor T1, the third transistor T3, the sixth transistor T6, and the seventh transistor T7 are all P-type transistors, while the second transistor T2, the fourth transistor T4, the fifth transistor T5, the reset transistor Tr, the signal read transistor Ts, and the output transistor Tf are all N-type transistors. The second transistor T2, the fourth transistor T4, and the fifth transistor T5 are oxide transistors, which have low leakage current in the off state, can reduce the variation of the gate potential of the first transistor T1, thereby ensuring display uniformity. Figure 24 As exemplarily shown in FIG, the second end of the photosensitive device 23 reuses the second power supply Vss, the first electrode of the reset transistor Tr reuses the first power supply Vdd, and the first electrode of the signal reading transistor Ts reuses the first power supply Vdd. Figure 25 Another driving timing diagram of a display panel is provided for an embodiment of the present invention. Figure 25 Applies to Figure 24The working process of the display panel includes an initialization phase t1, a data writing phase t2, a light emitting phase t3, a reset phase t4, a signal generating phase t5 and a signal output phase t6.

[0134] During the initialization phase t1 / reset phase t4, the signals on the first scan line S1, the second scan line S2, the third scan line S3, and the light-emitting control signal line EM are high, while the signals on the fourth scan line S4 and the signal output control line Select are low. The second transistor T2, the third transistor T3, the sixth transistor T6, the seventh transistor T7, and the output transistor Tf are all off, while the fourth transistor T4, the fifth transistor T5, and the reset transistor Tr are turned on. The turned-on fourth transistor T4 writes the initialization voltage provided by the initialization signal line Vref to the gate of the first transistor T1, and the turned-on fifth transistor T5 writes the initialization voltage provided by the initialization signal line Vref to the first terminal of the light-emitting device 14, thereby preventing residual charge at the first terminal of the light-emitting device 14 from affecting the brightness of the light. The turned-on reset transistor Tr outputs the first power supply voltage transmitted by the first power supply Vdd to the first terminal of the photosensitive device 23 and the gate of the signal read transistor Ts, thereby resetting the voltages of the photosensitive device 23 and the signal read transistor Ts, thereby preventing residual charge from the previous fingerprint detection from affecting the current fingerprint detection result.

[0135] During the data writing phase t2, the signals on the first scan line S1, the second scan line S2, the third scan line S3, and the signal output control line Select are all low, while the signals on the fourth scan line S4 and the emission control signal line EM are high. The fourth transistor T4, the fifth transistor T5, the sixth transistor T6, the seventh transistor T7, the reset transistor Tr, and the output transistor Tf are all turned off, while the second transistor T2 and the third transistor T3 are turned on. The turned-on second transistor T2 and third transistor T3 write the data voltage provided by the data line Vdata into the gate of the first transistor T1, simultaneously causing the gate voltage of the first transistor T1 to be associated with the threshold voltage of the first transistor T1, thereby implementing data voltage writing and threshold voltage compensation for the first transistor T1.

[0136] Both the signal generation phase t5 and the signal output phase t6 occur within the light-emitting phase t3. Throughout the light-emitting phase t3, the signals on the second scan line S2, the third scan line S3, the fourth scan line S4, and the light-emission control signal line EM are low, while the signal on the first scan line S1 is high. The second transistor T2, the third transistor T3, the fourth transistor T4, and the fifth transistor T5 are turned off, while the sixth transistor T6 and the seventh transistor T7 are turned on. The first transistor T1 generates a drive current based on its gate voltage and the voltage provided by the first power supply Vdd, driving the light-emitting device 14 to emit light.

[0137] During signal generation phase t5, the signal on signal output control line Select is low, turning off both reset transistor Tr and output transistor Tf. Light-emitting device 14 is used to provide illumination for photosensitive device 23. Fingerprints consist of valleys and ridges, and different fingerprints reflect light differently, resulting in varying light intensities received by photosensitive device 23 and, consequently, varying charges accumulated at the first terminal of photosensitive device 23.

[0138] In the signal output stage t6, the signal on the signal output control line Select is at a high level, the reset transistor Tr is turned off, the output transistor Tf is turned on, and the signal reading transistor Ts generates different fingerprint detection signals according to different voltages on its gate, and outputs the fingerprint detection signals through the turned-on output transistor Tf to complete the fingerprint detection.

[0139] Figure 26 A schematic structural diagram of another display panel provided by an embodiment of the present invention, Figure 26 and Figure 24 The difference is that the gate of the reset transistor Tr reuses the fourth scan line S4, that is, in the data writing stage, when the pixel circuit writes the data voltage and compensates the threshold voltage, the reset transistor Tr of the fingerprint detection circuit is turned on to reset the photosensitive device 23. Figure 27 A schematic structural diagram of another display panel provided by an embodiment of the present invention, Figure 27 and Figure 24 The difference is that the gate of the reset transistor Tr reuses the third scan line S3, that is, when the pixel circuit initializes the light emitting device 14, the reset transistor Tr of the fingerprint detection circuit is turned on to reset the photosensitive device 23.

[0140] Figure 28 A schematic diagram of another display panel structure provided by an embodiment of the present invention, referring to Figure 28 Optionally, the signal output module 22 includes a signal acquisition transistor Ts and an output transistor Tf, the first electrode of the signal acquisition transistor Ts serves as the power supply terminal VC, the second electrode of the signal acquisition transistor Ts is connected to the first electrode of the output transistor Tf, the gate of the signal acquisition transistor Ts is connected to the reset module 21, the gate of the output transistor Tf is connected to the output control signal line Select or the first scan line S1 or the second scan line S2 or the third scan line S3, and the second electrode of the output transistor Tf serves as the signal output terminal OUT. Figure 28 As exemplarily shown in FIG, the gate of the output transistor Tf is connected to the second scan line S2. Figure 28 The structure shown is Figure 6 The difference is that the second end of the photosensitive device 14 is connected to the fourth power supply Vcom, the first electrode of the signal reading transistor Ts reuses the first power supply Vdd, the gate of the output transistor Tf reuses the second scan line S2, and the connection structure of other transistors is the same as Figure 6 The same, no longer repeated here. Figure 29 Another driving timing diagram of a display panel provided by an embodiment of the present invention is shown in FIG. Figure 29 The timing diagram shown applies to Figure 28 The display panel shown. Figure 29 The timing shown is similar to Figure 7 The difference between the timings shown is that the signal output phase t6 coincides with the initialization phase t1 of the second frame t02 of the pixel circuit. That is, during the light-emitting phase t3 of the first frame t01 of the pixel circuit, the fingerprint detection circuit completes the reset phase t4 and the signal generation phase t5 to generate the fingerprint signal. During the initialization phase t1 of the second frame t02 of the pixel circuit, the fingerprint detection signal is output synchronously. Figure 30 A schematic diagram of another display panel structure provided by an embodiment of the present invention, referring to Figure 30 , Figure 30 and Figure 28 The difference is that the gate of the output transistor Tf is connected to the first scan line S1 or the fourth scan line S4. In this embodiment, it is exemplified that the signals of the first scan line S1 and the fourth scan line S4 are the same. Figure 30 The structure shown is Figure 28 The difference in the working process of the structure is that the signal output stage t6 coincides with the data writing stage t2 of the second frame of the pixel circuit, that is, when the data voltage is written and the threshold voltage is compensated in the second frame of the pixel circuit, the fingerprint detection signal of the previous frame is output at the same time.

[0141] Figure 31 A schematic diagram of another display panel structure provided by an embodiment of the present invention, referring to Figure 31 , Figure 31 and Figure 28 The difference is that the gate of the output transistor Tf is connected to the third scan line S3. Figure 31 In the structure shown, the signals on the second scan line S2 and the third scan line S3 are different, so as to initialize the gate of the first transistor T1 and the light emitting device 14 at different stages respectively. Figure 31 The structure shown is Figure 28 The difference in the working process of the structure is that when the light emitting device 14 is initialized in the second frame of the pixel circuit display, the fingerprint detection signal is output at the same time.

[0142] Figure 32 A schematic structural diagram of another display panel provided by an embodiment of the present invention, Figure 32 and Figure 24 The difference is that the gate of the reset transistor Tr is connected to the reset signal line Rest, and the gate of the output transistor Tf is multiplexed with the second scan line S2. Figure 33 Another driving timing diagram of a display panel provided by an embodiment of the present invention is shown in FIG. Figure 33 The timing diagram shown applies to Figure 32 The display panel shown. In this embodiment, the initialization phase t1 and the signal output phase t6 of the second frame t02 overlap. That is, when the light-emitting device 14 and the first transistor T1 are initialized in the pixel circuit in the second frame t02, the fingerprint detection circuit outputs the fingerprint detection signal generated in the light-emitting phase t3 of the first frame t01. During the data writing phase t2, the pixel circuit writes the data voltage and compensates the threshold voltage. During the reset phase t4, the fingerprint detection circuit resets the photosensitive device 23. During the light-emitting phase t4, the driving current generated by the first transistor T1 drives the light-emitting device 14 to emit light. At the same time, the gate of the signal reading transistor Ts generates different voltages due to the different light-sensitive states of the photosensitive device 23.

[0143] Figure 34 A schematic diagram of another display panel structure provided by an embodiment of the present invention, referring to Figure 34 Optionally, the gate of the output transistor Tf is connected to the fourth scan line S4. Figure 34 and Figure 32 The difference is that the gate of the output transistor Tf reuses the fourth scan line S4, that is, when the pixel circuit performs data voltage writing and threshold voltage compensation in the second frame, the output transistor Tf of the fingerprint detection circuit is turned on, and then outputs the fingerprint detection signal generated by the pixel circuit in the light-emitting stage of the first frame.

[0144] Figure 35 A schematic structural diagram of another display panel provided by an embodiment of the present invention, Figure 35 In the structure shown, the signals on the second scan line S2 and the third scan line S3 are different, so as to initialize the gate of the first transistor T1 and the light emitting device 14 at different stages respectively. Figure 35 and Figure 32 The difference is that the gate of the output transistor Tf reuses the third scan line S3, that is, when the pixel circuit initializes the light-emitting device 14 in the second frame, the output transistor Tf of the fingerprint detection circuit is turned on, and then the fingerprint detection signal generated by the pixel circuit in the light-emitting stage of the first frame is output.

[0145] Figure 36 A schematic diagram of another display panel structure provided by an embodiment of the present invention, referring to Figure 36 Optionally, the first electrode of the signal acquisition transistor Ts is connected to the first power supply Vdd. Figure 37 and Figure 6 The difference is that the second end of the photosensitive device 23 is connected to the fourth power supply Vcom, the first electrode of the signal acquisition transistor Ts is connected to the first power supply Vdd, and the other structures are the same as Figure 6 same. Figure 7 The timing diagram shown also applies to Figure 36 , Figure 36 The specific working process of the display panel shown is not repeated here in this embodiment.

[0146] Figure 37 This is a structural diagram of another display panel provided by an embodiment of the present invention. Optionally, the first electrode of the signal acquisition transistor Ts is connected to the light emitting control signal line EM. Figure 37 and Figure 6 The difference is that the second end of the photosensitive device 23 is connected to the fourth power supply Vcom, the first electrode of the signal acquisition transistor Ts is connected to the light emitting control signal line EM, and the other structures are the same as Figure 6 same. Figure 7 The timing diagram shown also applies to Figure 37 , Figure 37 The specific working process of the display panel shown is not repeated here in this embodiment.

[0147] Figure 38 A schematic structural diagram of another display panel provided by an embodiment of the present invention, Figure 38 and Figure 37 The difference is that the second transistor T2, the fourth transistor T4, the fifth transistor T5, the reset transistor Tr, the signal reading transistor Ts and the output transistor Tf are all oxide transistors, and further, are all N-type transistors, and the signals on the first scan line S1 and the fourth scan line S4 are different. Figure 39 Another driving timing diagram of a display panel provided by an embodiment of the present invention is shown in FIG. Figure 39 The timing diagram shown applies to Figure 38 The working process of the display panel includes an initialization phase t1, a data writing phase t2, a light emitting phase t3, a reset phase t4, a signal generating phase t5 and a signal output phase t6.

[0148] During the initialization phase t1, the signals on the first scan line S1, the second scan line S2, the third scan line S3, and the light-emitting control signal line EM are at a high level, while the signals on the fourth scan line S4, the reset control signal line Rest, and the signal output control line Select are all at a low level. The second transistor T2, the third transistor T3, the sixth transistor T6, the seventh transistor T7, the reset transistor Tr, and the output transistor Tf are all turned off. The fourth transistor T4 and the fifth transistor T5 are turned on. The fourth transistor T4, when turned on, writes the initialization voltage provided by the initialization signal line Vref into the gate of the first transistor T1. The fifth transistor T5, when turned on, writes the initialization voltage provided by the initialization signal line Vref into the first terminal of the light-emitting device 14, thereby preventing the residual charge at the first terminal of the light-emitting device 14 from affecting the light-emitting brightness.

[0149] During data writing phase t2, the signals on the first scan line S1, the second scan line S2, the third scan line S3, the reset control signal line Rest, and the signal output control line Select are all low, while the signals on the fourth scan line S4 and the emission control signal line EM are high. The fourth transistor T4, the fifth transistor T5, the sixth transistor T6, the seventh transistor T7, the reset transistor Tr, and the output transistor Tf are all turned off, while the second transistor T2 and the third transistor T3 are turned on. The turned-on second transistor T2 and third transistor T3 write the data voltage provided by the data line Vdata into the gate of the first transistor T1, simultaneously causing the gate voltage of the first transistor T1 to be associated with the threshold voltage of the first transistor T1, thereby implementing data voltage writing and threshold voltage compensation for the first transistor T1.

[0150] In the reset stage t4, the signals on the second scan line S2, the third scan line S3 and the fourth scan line S4 are all low levels, the signals on the first scan line S1, the light-emitting control signal line EM and the reset control signal line Rest are all low-high levels, the second transistor T2, the third transistor T3, the fourth transistor T4, the fifth transistor T5, the sixth transistor T6, the seventh transistor T7 and the output transistor Tf are all turned off, and the reset transistor Tr is turned on. The turned-on reset transistor Tr outputs the reset voltage transmitted by the reset signal line Vrst to the first end of the photosensitive device 23 and the gate of the signal reading transistor Ts, completing the resetting of the voltage of the photosensitive device 23 and the signal reading transistor Ts, thereby avoiding the influence of the residual charge in the last fingerprint detection on the fingerprint detection result of this time.

[0151] During the signal generation phase t5 / light-emitting phase t3, the signals on the second scan line S2, the third scan line S3, the fourth scan line S4, and the light-emitting control signal line EM are low, while the signal on the first scan line S1 is high. The second transistor T2, the third transistor T3, the fourth transistor T4, and the fifth transistor T5 are off, while the sixth transistor T6 and the seventh transistor T7 are on. The first transistor T1 generates a drive current based on its gate voltage and the voltage provided by the first power supply Vdd, driving the light-emitting device 14 to emit light. The signals on the reset control signal line Rest and the signal output control line Select are both low, and the reset transistor Tr and the output transistor Tf are both off. The light-emitting device 14 is used to provide illumination for the photosensitive device 23. Fingerprints consist of valleys and ridges, and different fingerprints reflect light differently, resulting in different light intensities received by the photosensitive device 23, and thus different charges accumulated at the first terminal of the photosensitive device 23.

[0152] In the signal output stage t6, the signal on the signal output control line Select is at a high level, the reset transistor Tr is turned off, the output transistor Tf is turned on, and the signal reading transistor Ts generates different fingerprint detection signals according to different voltages on its gate, and outputs the fingerprint detection signals through the turned-on output transistor Tf to complete the fingerprint detection.

[0153] It is worth noting that Figure 39 The timing shown shows the timing of two frames when the pixel circuit is displaying. In the first frame t01, the fingerprint detection circuit completes the reset of the photosensitive device 23 and generates a fingerprint detection signal in the light-emitting phase t3 of the first frame t01. In the second frame t02, the fingerprint detection signal is output.

[0154] Figure 40 A schematic diagram of another display panel structure provided by an embodiment of the present invention, referring to Figure 40 Optionally, the reset signal control terminal RS is connected to the reset control signal line Rest, the reset signal input terminal IN is connected to the light emitting control signal line EM, the power supply terminal VC is connected to the first power supply Vdd, and the second end of the photosensitive device 23 is connected to the second power supply Vss. Figure 7 The timing diagram shown applies to Figure 40 , this embodiment is for Figure 40 The working process shown will not be repeated. Figure 40 The fingerprint detection circuit reuses the light emitting control signal line EM, the first power supply Vdd and the second power supply Vss in the pixel circuit, which can further save the types and number of signal lines in the display panel and further simplify the structure of the display panel.

[0155] Figure 41 A schematic diagram of another display panel structure provided by an embodiment of the present invention, referring to Figure 41 Optionally, the second electrode of the output transistor Tf is connected to the data line Vdata, and the display panel also includes a time-sharing control circuit 24, which is used to provide a data voltage and read a fingerprint detection signal to the data line Vdata based on a first time-sharing control signal and a second time-sharing control signal.

[0156] When the second time-sharing control signal is a valid signal, the time-sharing control circuit 24 controls the data voltage on the data line Vdata to be transmitted into the display panel. When the first time-sharing control signal is a valid signal, the data line Vdata no longer transmits the data line to the pixel circuit, but reads the fingerprint detection signal to the external chip, thereby realizing the fingerprint detection circuit multiplexing the data line, saving the data and types of signal lines, and simplifying the display panel structure.

[0157] Continue to refer Figure 41Optionally, the time-sharing control circuit 24 includes: a first time-sharing control transistor M1 and a second time-sharing control transistor M2, the first electrode of the first time-sharing control transistor M1 is connected to the second electrode of the output transistor Tf, the second electrode of the first time-sharing control transistor M1 is connected to the fingerprint drive chip 3, and the gate of the first time-sharing control transistor M1 is connected to the first time-sharing control signal line TRO, and the first time-sharing control signal line TRO is used to provide a first time-sharing control signal;

[0158] The first electrode of the second time-sharing control transistor M2 is connected to the second electrode of the output transistor Tf, the second electrode of the second time-sharing control transistor M2 is connected to the display driver chip 4, and the gate of the second time-sharing control transistor M2 is connected to the second time-sharing control signal line TD, which is used to provide a second time-sharing control signal.

[0159] Figure 42 A driving timing diagram of a display panel provided by an embodiment of the present invention, Figure 42 The timing diagram shown applies to Figure 41 The display panel shown, and exemplary, Figure 41 In the embodiment, the first transistor T1, the third transistor T3, the sixth transistor T6 and the seventh transistor T7 are low-temperature polysilicon transistors, and further, are all P-type transistors, and the remaining transistors are all oxide transistors, ie, N-type transistors.

[0160] In this embodiment, the reset signal control terminal RS is electrically connected to the light-emission control signal line EM, the reset signal input terminal IN is connected to the first power supply Vdd, the power supply terminal VC is connected to the first power supply Vdd, the second terminal of the photosensitive device 23 is connected to the second power supply Vss, and the signal output terminal OUT is connected to the data line Vdata. The operation process of the display panel includes an initialization phase t1, a data writing phase t2, a light-emitting phase t3, a reset phase t4, a signal generation phase t5, and a signal output phase t6.

[0161] During initialization phase t1, the signals on the second scan line S2 and the third scan line S3 are high, the signal on the first scan line S1 is high, the signal on the light-emitting control signal line EM, and the signal on the second time-sharing control signal line TD are all high. The signals on the fourth scan line S4, the signal output control line Select, and the first time-sharing control signal line TRO are all low. The second transistor T2, the third transistor T3, the sixth transistor T6, the seventh transistor T7, the output transistor Tf, and the first time-sharing control transistor M1 are all turned off. The fourth transistor T4, the fifth transistor T5, the reset transistor Tr, and the second time-sharing control transistor M2 are turned on. The turned-on fourth transistor T4 writes the initialization voltage provided by the initialization signal line Vref to the gate of the first transistor T1, and the turned-on fifth transistor T5 writes the initialization voltage provided by the initialization signal line Vref to the first terminal of the light-emitting device 14, thereby preventing residual charge at the first terminal of the light-emitting device 14 from affecting the brightness of the light. Simultaneously, during initialization phase t1, the photosensitive device 23 is reset.

[0162] During data writing phase t2, the signals on the first scan line S1, the second scan line S2, the third scan line S3, the signal output control line Select, and the first time-sharing control signal line TRO are all low, while the signals on the second time-sharing control signal line TD, the fourth scan line S4, and the emission control signal line EM are all high. The fourth transistor T4, the fifth transistor T5, the sixth transistor T6, the seventh transistor T7, the first time-sharing control transistor M1, and the output transistor Tf are all turned off, while the second transistor T2, the third transistor T3, the reset transistor Tr, and the second time-sharing control transistor M2 are turned on. The turned-on second time-sharing control transistor M2, the second transistor T2, and the third transistor T3 write the data voltage provided by the data line Vdata into the gate of the first transistor T1, simultaneously causing the gate voltage of the first transistor T1 to be associated with the threshold voltage of the first transistor T1, thereby implementing data voltage writing and threshold voltage compensation for the first transistor T1. Simultaneously, during data writing phase t2, the photosensitive device 23 is reset.

[0163] In this embodiment, the reset phase t4 coincides with the time period when the light emitting control signal line EM is at a high level, that is, during the non-light emitting phase of the pixel circuit, the fingerprint detection circuit is resetting the photosensitive device 23 .

[0164] In the light-emitting stage t3 (the signal generation stage t5 and the signal output stage t6 are within the light-emitting stage), the signal on the first scan line S1 is at a high level, the signals on the fourth scan line S4, the second scan line S2, the third scan line S3 and the light-emitting control signal line EM are at a low level, the second transistor T2, the third transistor T3, the fourth transistor T4, and the fifth transistor T5 are turned off, the sixth transistor T6 and the seventh transistor T7 are turned on, and the first transistor T1 generates a driving current according to its gate voltage and the voltage provided by the first power supply Vdd to drive the light-emitting device 14 to emit light.

[0165] During the signal generation phase t5, the signal on the light-emitting control signal line EM is at a low level, the signal on the signal output control line Select is at a low level, and the reset transistor Tr and the output transistor Tf are both turned off. The light-emitting device 14 is used to provide light to the photosensitive device 23. Fingerprints include valleys and ridges. Different fingerprints reflect light differently, resulting in different light intensities received by the photosensitive device 23, and thus different charges accumulated at the first end of the photosensitive device 23. During the signal generation phase t5, the signal on the second time-sharing control signal line TD jumps from a high level to a low level, and the second time-sharing control transistor M2 changes from on to off. The signal on the first time-sharing control signal line TRO jumps from a low level to a high level, and the first time-sharing control transistor M1 changes from off to on.

[0166] In the signal output stage t6, the signal on the light-emitting control signal line EM and the signal on the second time-sharing control signal line TD are at a low level, the signal on the signal output control line Select and the signal on the first time-sharing control signal line TRO are at a high level, the reset transistor Tr and the second time-sharing control transistor M2 are turned off, the output transistor Tf and the first time-sharing control transistor M1 are turned on, and the signal reading transistor Ts generates different fingerprint detection signals according to different gate voltages, and outputs the fingerprint detection signals through the turned-on output transistor Tf and the data line to complete the fingerprint detection.

[0167] It is worth noting that when the fingerprint detection circuit and the pixel circuit share the data line, the fingerprint detection signal can be output after the data voltage is written to the pixel circuits of all rows of the current frame of the pixel circuit and before the data voltage of the next frame is written, thereby realizing time-sharing multiplexing of the data line, that is, the data voltage is written through the data line Vdata, and the fingerprint detection signal is output through the data line Vdata.

[0168] Figure 5 、 Figure 7 、 Figure 19 、 Figure 21 、 Figure 23 、 Figure 25 and Figure 42In the timing shown in , the signal output phase t6 overlaps with the light-emitting phase t3, and the signal generation phase t5 and the signal output phase t6 are both located within the light-emitting phase t3. Since the generation of the fingerprint detection signal depends on the light emitted by the pixel circuit, the display panel to which the above timing diagram is applicable generates the fingerprint detection signal of this frame during the light-emitting phase and then outputs the fingerprint detection signal during the light-emitting phase. Figure 29 、 Figure 33 and Figure 39 In the figure, there is no overlap between the signal output stage t6 and the light-emitting stage t3, that is, the signal output stage t6 is located in the non-light-emitting stage, and the signal generation stage t5 is located in the light-emitting stage t3 of the first frame t01 of the pixel circuit, that is, the fingerprint detection circuit generates a fingerprint detection signal during the entire light-emitting stage t3 in the first frame, and outputs the generated fingerprint detection signal in the second frame t02 of the pixel circuit.

[0169] In addition to the above-described diagrams, in other embodiments, the first electrode of the signal read transistor is connected to the first power supply, the second end of the photosensitive device is connected to the second power supply, the first electrode of the reset transistor is connected to the first power supply, the gate of the output transistor is connected to the signal output control line, the gate of the reset transistor is connected to the reset control signal line, and the second electrode of the output transistor is connected to the signal read line. Alternatively, the first electrode of the signal read transistor is connected to the first power supply, the second end of the photosensitive device is connected to the second power supply, the first electrode of the reset transistor is connected to the light emission control signal line, the gate of the output transistor is connected to the signal output control line, the gate of the reset transistor is connected to the reset control signal line, and the second electrode of the output transistor is connected to the data line. Alternatively, the first electrode of the signal read transistor is connected to the first power supply, the second end of the photosensitive device is connected to the second power supply, the first electrode of the reset transistor is connected to the light emission control signal line, the gate of the output transistor is connected to the signal output control line, the gate of the reset transistor is connected to the first scan line, and the second electrode of the output transistor is connected to the data line. Alternatively, the first electrode of the signal reading transistor is connected to the first power supply, the second end of the photosensitive device is connected to the second power supply, the first electrode of the reset transistor is connected to the light-emitting control signal line, the gate of the output transistor is connected to the first scanning line, the gate of the reset transistor is connected to the reset control signal line, and the second electrode of the output transistor is connected to the data line.

[0170] In this embodiment, the second end of the photosensitive device can reuse the first power supply or the second power supply or the light-emitting control signal line or the initialization signal line, the first pole of the reset transistor (the entry signal input end of the fingerprint detection circuit) can reuse the initialization signal line or the light-emitting control signal line, the gate of the reset transistor (reset signal control end) can reuse the first scan line or the second scan line or the third scan line or the fourth scan line, the first pole of the signal acquisition transistor can reuse the first power supply and the light-emitting control signal line, the gate of the output transistor can reuse the first scan line or the second scan line or the third scan line or the fourth scan line, and the second pole of the output transistor (signal output end) can reuse the data line. The fingerprint detection circuit can select at least one of the ports shown above to be reused with the signal line of the pixel circuit to reduce the number and types of signal lines and simplify the structure of the display panel. It is worth noting that the embodiments described above only illustrate several examples of port multiplexing, and the present invention is not limited to this. Other combinations of port multiplexing are also covered within the scope of protection of the present invention. And the pixel circuit of the embodiment of the present invention can be used with Figure 10-15 The fingerprint detection circuits shown can be combined arbitrarily, and this embodiment does not impose any specific limitation on this.

[0171] An embodiment of the present invention further provides a display device, Figure 43 A schematic diagram of a display device according to an embodiment of the present invention is provided. Figure 43 The display device 5 includes the display panel 6 described in any of the above embodiments. The display device 5 can be Figure 43 The mobile phone shown may also be a computer, a television, a smart wearable display device, etc., and the embodiment of the present invention does not specifically limit this.

[0172] The beneficial effects of the display device are the same as those of the display panel, and will not be described in detail in this embodiment.

[0173] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A display panel, characterized in that: include: A pixel circuit and a fingerprint detection circuit, wherein the pixel circuit includes a light-emitting device; The pixel circuit is connected to the scan line, the data line, the initialization signal line, the first power supply, and the second power supply respectively, and is used to drive the light-emitting device to emit light based on the signals provided by the scan line, the data line, the initialization signal line, the first power supply, and the second power supply; The fingerprint detection circuit includes a reset signal control terminal, a reset signal input terminal, a power supply terminal, a signal output terminal, and a photosensitive device. The fingerprint detection circuit is used to reset the photosensitive device based on the signals input from the reset signal control terminal and the reset signal input terminal, and output a fingerprint detection signal through the signal output terminal; The signal generation phase of the fingerprint detection circuit is located within the light emitting phase of the pixel circuit; the light emitting device of the pixel circuit provides a light source for the light sensing device; The reset signal control terminal is connected to the reset control signal line or the scan line. and / or, the reset signal input terminal is connected to the reset signal line or the initialization signal line or the scan line, and / or, the power supply end is connected to a third power line or the first power supply or the scan line, And / or, the signal output end is connected to the signal reading line or the data line.

2. The display panel according to claim 1, wherein: The fingerprint detection circuit further includes a reset module and a signal output module, wherein the reset module is used to reset the photosensitive device and the signal output module based on the signals of the reset signal control terminal and the reset signal input terminal, and the signal output module is used to generate and output the fingerprint detection signal based on the signals of the reset signal control terminal, the reset signal input terminal, the power supply terminal and the light-sensing state of the photosensitive device; The pixel circuit also includes a data writing module, a driving module and an initialization module. The scan lines include a first scan line, a second scan line and / or a third scan line. The data writing module is connected to the data line and the first scan line. The data writing module is used to transmit the data voltage output by the data line to the control end of the driving module. The initialization module is connected to the initialization signal line, the second scan line and / or the third scan line. The initialization module is used to initialize the control end of the driving module and / or the light-emitting device. The driving module and the light-emitting device are connected between the first power supply and the second power supply. The driving module is used to generate a driving current according to the data voltage to drive the light-emitting device to emit light.

3. The display panel according to claim 2, wherein: The pixel circuit further includes a light emitting control module and a compensation module, the scan line further includes a light emitting control signal line and a fourth scan line, the light emitting control module is connected to the light emitting control signal line, and the light emitting control module, the driving module and the light emitting device are connected between the first power supply and the second power supply; The compensation module is connected to the fourth scan line, connected between the first end and the control end of the driving module, and is configured to perform threshold compensation on the driving module based on a signal on the fourth scan line.

4. The display panel according to claim 3, wherein: The first end of the photosensitive device is connected to the reset module, and the second end of the photosensitive device is connected to the light-emitting control signal line.

5. The display panel according to claim 3, wherein: The reset module includes a reset transistor, the first electrode of the reset transistor serves as the reset signal input end, the second electrode of the reset transistor is connected to the signal output module and the photosensitive device respectively, the gate of the reset transistor serves as the reset signal control end, and the first electrode of the reset transistor is connected to the initialization signal line or the first power supply.

6. The display panel according to claim 5, wherein: A gate of the reset transistor is connected to the first scan line, the second scan line, the third scan line, the fourth scan line, or the light emission control signal line.

7. The display panel according to claim 3, wherein: The reset module includes a reset transistor, the first electrode of the reset transistor serves as the reset signal input end, the second electrode of the reset transistor is respectively connected to the signal output module and the photosensitive device, the gate of the reset transistor serves as the reset signal control end, and the first electrode of the reset transistor is connected to the light-emitting control signal line.

8. The display panel according to claim 7, wherein: A gate of the reset transistor is connected to the first scan line, the second scan line, the third scan line, or the fourth scan line.

9. The display panel according to claim 2, wherein: A first end of the photosensitive device is connected to the reset module, and a second end of the photosensitive device is connected to the first power supply or the second power supply or the initialization signal line.

10. The display panel according to claim 2, wherein: The signal output module includes a signal acquisition transistor and an output transistor, the first electrode of the signal acquisition transistor serves as the power supply end, the second electrode of the signal acquisition transistor is connected to the first electrode of the output transistor, the gate of the signal acquisition transistor is connected to the reset module, the gate of the output transistor is connected to the output control signal line or the first scan line or the second scan line or the third scan line, and the second electrode of the output transistor serves as the signal output end.

11. The display panel according to claim 10, wherein: A first electrode of the signal acquisition transistor is connected to the first power supply.

12. The display panel according to claim 3, wherein: The signal output module includes a signal acquisition transistor and an output transistor, the first electrode of the signal acquisition transistor serves as the power supply end, the second electrode of the signal acquisition transistor is connected to the first electrode of the output transistor, the gate of the signal acquisition transistor is connected to the reset module, and the gate of the output transistor is connected to the fourth scan line.

13. The display panel according to claim 12, wherein: A first electrode of the signal acquisition transistor is connected to the light emission control signal line.

14. The display panel according to claim 10, wherein: The second electrode of the output transistor is connected to the data line. The display panel also includes a time-sharing control circuit, which is used to provide a data voltage to the data line and read the fingerprint detection signal in a time-sharing manner based on a first time-sharing control signal and a second time-sharing control signal.

15. The display panel according to claim 14, wherein: The time-sharing control circuit includes: a first time-sharing control transistor and a second time-sharing control transistor, wherein the first electrode of the first time-sharing control transistor is connected to the second electrode of the output transistor, the second electrode of the first time-sharing control transistor is connected to the fingerprint driver chip, and the gate of the first time-sharing control transistor is connected to a first time-sharing control signal line, and the first time-sharing control signal line is used to provide the first time-sharing control signal; The first electrode of the second time-sharing control transistor is connected to the second electrode of the output transistor, the second electrode of the second time-sharing control transistor is connected to the display driver chip, the gate of the second time-sharing control transistor is connected to the second time-sharing control signal line, and the second time-sharing control signal line is used to provide the second time-sharing control signal.

16. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 15.

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