Display panel and display device

Abstract

The present disclosure provides a display panel and a display device, which relate to the field of display technology and are used for displaying images and fingerprint recognition. The display panel includes a substrate, a circuit structure layer, a plurality of fingerprint recognition sensors, a pixel definition layer and a light-emitting device layer. The circuit structure layer includes a plurality of pixel circuits. The plurality of fingerprint recognition sensors include a first electrode, a second electrode and a photosensitive pattern located between the first electrode and the second electrode. The pixel definition layer is arranged on a side of the circuit structure layer away from the substrate; a plurality of first openings are arranged in the pixel definition layer; the orthographic projections of the plurality of first openings on the substrate are staggered with the orthographic projections of the plurality of fingerprint recognition sensors on the substrate. The light-emitting device layer includes a plurality of light-emitting devices, each of which is arranged corresponding to a first opening and is electrically connected to a pixel circuit. The present disclosure integrates a plurality of fingerprint recognition sensors into a display panel to realize under-screen fingerprint recognition of a display device and improve the accuracy of fingerprint recognition.

Description

Technical Field

[0001] The present disclosure 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 display technology, fingerprint recognition has been widely used in electronic devices such as smart phones, tablet computers, and smart wearable devices. Generally, the fingerprint recognition module can be integrated into three different positions of the electronic device. That is, the fingerprint recognition module can be integrated into any one or more positions of the back side, frame, and power button at the bottom of the display side of the electronic device.

[0003] With the emergence of the full-screen concept, under-screen fingerprint recognition has become another research hotspot in the display field. In related technologies, the fingerprint recognition function is realized by setting an optical fingerprint recognition module on the back side of the display panel. However, the optical fingerprint recognition module is far away from the finger, and the optical path of the light reflected by the finger into the optical fingerprint recognition sensor is relatively complex, resulting in large light loss and low accuracy of fingerprint recognition results. Summary of the invention

[0004] The purpose of the present disclosure is to provide a display panel and a display device for realizing fingerprint recognition under the display device and improving the accuracy of fingerprint recognition.

[0005] In order to achieve the above objectives, the present disclosure provides the following technical solutions:

[0006] On the one hand, a display panel is provided. The display panel includes a substrate, a circuit structure layer, a plurality of fingerprint recognition sensors, a pixel definition layer and a light-emitting device layer. The circuit structure layer is arranged on the substrate, and the circuit structure layer includes a plurality of pixel circuits. The plurality of fingerprint recognition sensors include a first electrode, a second electrode and a photosensitive pattern located between the first electrode and the second electrode. The pixel definition layer is arranged on a side of the circuit structure layer away from the substrate; a plurality of first openings are arranged in the pixel definition layer; the orthographic projections of the plurality of first openings on the substrate are staggered with the orthographic projections of the plurality of fingerprint recognition sensors on the substrate; the light-emitting device layer is arranged on a side of the circuit structure layer away from the substrate; the light-emitting device layer includes a plurality of light-emitting devices, each light-emitting device is arranged corresponding to one of the first openings and is electrically connected to one of the pixel circuits.

[0007] In some embodiments, the circuit structure layer further includes a plurality of acquisition circuits, each of which is electrically connected to at least one fingerprint recognition sensor; and the acquisition circuit includes at least one first thin film transistor.

[0008] In some embodiments, the display panel further includes a first insulating layer. The first insulating layer is located between the circuit structure layer and the pixel definition layer; a plurality of first through holes are provided in the first insulating layer, and the photosensitive pattern of the fingerprint recognition sensor is located in the first through holes. The first electrode is provided on a side of the photosensitive pattern away from the substrate, and the first electrode is configured to transmit a bias voltage; the second electrode is provided on a side of the photosensitive pattern close to the substrate, and is provided in the same layer as the first source and the first drain of the first thin film transistor; the second electrode is electrically connected to the first source or the first drain of the first thin film transistor of the corresponding acquisition circuit.

[0009] In some embodiments, the display panel further includes: a first light shielding portion, located on a side of the first insulating layer away from the circuit structure layer; a second opening is provided in the first light shielding portion, and an orthographic projection of the second opening on the substrate at least partially overlaps with an orthographic projection of the photosensitive pattern on the substrate; the first electrode is located in the second opening, and a gap exists between the first electrode and the boundary of the first light shielding portion at the second opening.

[0010] In some embodiments, the display panel further includes a plurality of bias voltage signal lines, which are arranged in the same layer as the first electrode; a first notch is provided in the first light shielding portion, and the bias voltage signal line passes through the first notch and is electrically connected to the first electrode.

[0011] In some embodiments, a plurality of second through holes are further provided in the first insulating layer, each second through hole surrounds a first through hole, and a gap is provided between the second through hole and the first through hole surrounded by the second through hole; the display panel further includes: a plurality of second light shielding portions, each second light shielding portion is located in one of the second through holes.

[0012] In some embodiments, the first light shielding portion is electrically connected to the second light shielding portion, and the second light shielding portion is electrically connected to the second electrode.

[0013] In some embodiments, along the axial direction of the first through hole, the openings at both ends of the first through hole are respectively: a third opening away from the substrate and a fourth opening close to the substrate; the orthographic projection of the third opening on the substrate is located within the range of the orthographic projection of the fourth opening on the substrate, and there is a gap between the boundary of the orthographic projection of the third opening on the substrate and the boundary of the orthographic projection of the fourth opening on the substrate.

[0014] In some embodiments, the pixel circuit includes at least one second thin film transistor, and the first thin film transistor and the second thin film transistor are arranged in the same layer.

[0015] In some embodiments, the display panel also includes an encapsulation layer, which is arranged on a side of the light-emitting device layer away from the substrate; wherein the multiple fingerprint recognition sensors are located on a side of the encapsulation layer away from the substrate; the display panel includes a first electrode layer, a photosensitive layer, and a second electrode layer which are stacked, and the second electrode layer is close to or away from the substrate relative to the first electrode layer; the first electrodes of the multiple fingerprint recognition sensors are located in the first electrode layer and are interconnected, the photosensitive patterns of the multiple fingerprint recognition sensors are located in the photosensitive layer and are connected to each other, and the second electrodes of the multiple fingerprint recognition sensors are located in the second electrode layer and are independently arranged.

[0016] In some embodiments, a plurality of third through holes are provided in the first electrode layer and the photosensitive layer, and an orthographic projection of each third through hole on the substrate at least partially overlaps with an orthographic projection of at least one of the first openings on the substrate.

[0017] In some embodiments, the display panel further includes an anti-reflection layer, which is located on a side of the multiple fingerprint recognition sensors away from the encapsulation layer; a plurality of fourth through holes and a plurality of fifth through holes are provided in the anti-reflection layer, and the orthographic projection of each fourth through hole on the substrate at least partially overlaps with the orthographic projection of at least one of the second electrodes on the substrate, and the orthographic projection of each fifth through hole on the substrate at least partially overlaps with the orthographic projection of at least one of the first openings on the substrate.

[0018] In some embodiments, the fingerprint recognition sensor is configured to be connected to a touch control chip so that the fingerprint recognition sensor is reused as a component for sensing a touch position.

[0019] In some embodiments, the photosensitive pattern includes an electron transport layer, an active layer, and a hole transport layer that are stacked; the material of the electron transport layer includes aluminum-doped zinc oxide, and the material of the hole transport layer includes molybdenum oxide.

[0020] On the other hand, a display device is provided, comprising the display panel as described in any one of the above embodiments.

[0021] The display panel and display device provided by the present disclosure have the following beneficial effects:

[0022] The display panel provided by the present disclosure integrates multiple fingerprint recognition sensors in the display panel, so that the display panel can realize the fingerprint recognition function while displaying the picture, thereby enabling the display device using the display panel to realize under-screen fingerprint recognition, which is conducive to the display device using the display panel to realize full-screen design and reduce the frame. Compared with the related art in which multiple fingerprint recognition sensors are arranged on the back side of the display panel, the fingerprint recognition sensor provided by the present disclosure is closer to the finger, and the light reflected by the finger can pass through fewer film layers to illuminate the fingerprint recognition sensor, which is conducive to improving the recognition accuracy of the fingerprint recognition sensor.

[0023] The beneficial effects that can be achieved by the display device provided by the present disclosure are the same as the beneficial effects that can be achieved by the display panel provided by the above technical solution, and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present disclosure, the following briefly introduces the drawings required to be used in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can also be obtained based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams, and are not limitations on the actual size of the product involved in the embodiments of the present disclosure, the actual process of the method, the actual timing of the signal, etc.

[0025] Figure 1 is a structural diagram of a display panel according to some embodiments;

[0026] Figure 2 is a schematic diagram of fingerprint recognition according to some embodiments;

[0027] Figure 3A is a top view of a display panel according to some embodiments;

[0028] Figure 3B is a top view of another display panel according to some embodiments;

[0029] Figure 4A is a fingerprint recognition circuit diagram according to some embodiments;

[0030] Figure 4B is another fingerprint recognition circuit diagram according to some embodiments;

[0031] Figure 5 is a structural diagram of another display panel according to some embodiments;

[0032] Figure 6 is a structural diagram of yet another display panel according to some embodiments;

[0033] Figure 7 is a structural diagram of another display panel according to some embodiments;

[0034] Figure 8 is a structural diagram of another display panel according to some embodiments;

[0035] Fig. 9A is a structural diagram of another display panel according to some embodiments;

[0036] Fig. 9B is a structural diagram of another display panel according to some embodiments;

[0037] Fig.10 is a structural diagram of another display panel according to some embodiments;

[0038] Fig.11A is a structural diagram of another display panel according to some embodiments;

[0039] Fig. 11B is a structural diagram of another display panel according to some embodiments;

[0040] Fig. 12A is a structural diagram of another display panel according to some embodiments;

[0041] Fig. 12B is a structural diagram of another display panel according to some embodiments;

[0042] Fig.13 is a structural diagram of another display panel according to some embodiments;

[0043] Fig.14 is a structural diagram of a touch control circuit according to some embodiments;

[0044] Fig.15A is a structural diagram of another display panel according to some embodiments;

[0045] Fig. 15B is a structural diagram of another display panel according to some embodiments;

[0046] Fig.16 is an energy level distribution diagram of a fingerprint recognition sensor according to some embodiments;

[0047] Fig.17 is a structural diagram of a display device according to some embodiments. DETAILED DESCRIPTION

[0048] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present disclosure.

[0049] Unless the context requires otherwise, throughout the specification and claims, the term "including" is to be interpreted as an open, inclusive meaning, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" and the like are intended to indicate that specific features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0050] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0051] When describing some embodiments, the term "connected" and its derivative expressions may be used. For example, when describing some embodiments, the term "connected" may be used to indicate that two or more components are in direct physical or electrical contact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0052] “At least one of A, B, and C” has the same meaning as “at least one of A, B, or C” and both include the following combinations of A, B, and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B, and C.

[0053] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0054] The use of "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0055] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0056] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of variation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0057] As used herein, "parallel", "perpendicular", and "equal" include the situations described and situations similar to the situations described, and the range of the similar situations is within the acceptable deviation range, wherein the acceptable deviation range is determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism may be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity may also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality may be, for example, the difference between the two equalities is less than or equal to 5% of either one.

[0058] Exemplary embodiments are described herein with reference to cross-sectional views and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of layers and regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are conceivable. Therefore, the exemplary embodiments should not be interpreted as being limited to the shapes of the regions shown herein, but include shape deviations due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device, and are not intended to limit the scope of the exemplary embodiments.

[0059] like Figure 1As shown, some embodiments of the present disclosure provide a display panel 10. The display panel 10 includes a substrate 1, a circuit structure layer 2, a plurality of fingerprint recognition sensors 3, a pixel definition layer 4, and a light-emitting device layer 5. The circuit structure layer 2 is disposed on the substrate 1. The circuit structure layer 2 includes a plurality of pixel circuits 21. The fingerprint recognition sensor 3 includes a first electrode 31, a second electrode 32, and a photosensitive pattern 33 located between the first electrode 31 and the second electrode 32. The pixel definition layer 4 is disposed on a side of the circuit structure layer 2 away from the substrate 1. A plurality of first openings 41 are disposed in the pixel definition layer 4. The orthographic projections of the plurality of first openings 41 on the substrate 1 are staggered with the orthographic projections of the plurality of fingerprint recognition sensors 3 on the substrate 1. The light-emitting device layer 5 is disposed on a side of the circuit structure layer 2 away from the substrate 1; the light-emitting device layer 5 includes a plurality of light-emitting devices 51. Each light-emitting device 51 is electrically connected to a pixel circuit 21. The orthographic projections of the plurality of fingerprint recognition sensors 3 on the substrate 1 are staggered with the orthographic projections of the plurality of light-emitting devices 51 on the substrate 1.

[0060] The material of the substrate 1 may be, for example, glass, PI (Polyimide) or PET (polyethylene terephthalate).

[0061] For example, the light emitting device 51 may be an organic light emitting diode. Figure 1 As shown, the light emitting device 51 may include a third electrode 511 , a fourth electrode 512 , and an organic light emitting layer 513 located between the third electrode 511 and the fourth electrode 512 .

[0062] “Each light emitting device 51 is electrically connected to one pixel circuit 21 ” may mean, for example, that the third electrode 511 of each light emitting device 51 is connected to one pixel circuit 21 .

[0063] In some examples, the third electrode 511 may be a single-layer structure or a multi-layer structure. When the third electrode 511 is a multi-layer structure, the third electrode 511 may include, for example, an indium tin oxide layer, a silver metal layer, and an indium tin oxide layer stacked in sequence.

[0064] The present disclosure does not limit the number and size of the light emitting devices 51 , as long as the normal display of the display panel 10 can be achieved.

[0065] In some embodiments of the present disclosure, multiple fingerprint recognition sensors 3 are integrated into the display panel 10, so that the display panel 10 can realize the fingerprint recognition function while displaying the picture, and thus the display device using the display panel 10 can realize the fingerprint recognition under the screen, which is conducive to the display device using the display panel 10 to realize the full screen design and reduce the frame. Compared with the related art in which multiple fingerprint recognition sensors are arranged on the back side of the display panel, the fingerprint recognition sensor 10 provided in some embodiments of the present disclosure is closer to the finger, and the light reflected by the finger can pass through fewer film layers to irradiate the fingerprint recognition sensor 3, which is conducive to improving the recognition accuracy of the fingerprint recognition sensor 3.

[0066] The multiple light emitting devices 51 in the display panel 10 can not only be used to display images, but also be used as light sources for multiple fingerprint recognition sensors 3. Figure 2 , the light L emitted by the light emitting device 51 is emitted toward the side of the light emitting device 51 away from the substrate 1, and irradiates the finger outside the display panel 10. The light L is reflected by the finger and then re-enters the display panel 10, so as to be received by the fingerprint recognition sensor 3. The fingerprint recognition sensor 3 generates an electrical signal according to the light reflected back to the display panel 10 by the finger, and outputs it to the fingerprint recognition chip to realize fingerprint recognition.

[0067] When multiple light-emitting devices 51 serve as light sources for multiple fingerprint recognition sensors 3, one light-emitting device 51 can serve as the light source of one fingerprint recognition sensor 3, or can serve as the light source of multiple fingerprint recognition sensors 3 at the same time, or multiple light-emitting devices 51 can serve as the light source of one fingerprint recognition sensor 3 at the same time.

[0068] The present disclosure does not limit the number, size, and distribution position of the fingerprint recognition sensors 3 .

[0069] In some examples, such as Figure 3A As shown, the fingerprint recognition sensor 3 may be distributed in a specific area S of the display panel 10 , so as to realize the fingerprint recognition function of the display panel 10 in the specific area S. For example, the specific area S may be a middle area of ​​the display panel 10 .

[0070] For example, in the specific area S, the number of fingerprint recognition sensors 3 may be equal to the number of light emitting devices 51 . For another example, in the specific area S, the number of fingerprint recognition sensors 3 may be less than the number of light emitting devices 51 .

[0071] In other examples, such as Figure 3B As shown, the fingerprint recognition sensors 3 can be evenly distributed throughout the display panel 10 to achieve full-screen fingerprint recognition.

[0072] In some embodiments, Figure 1As shown, the circuit structure layer 2 further includes a plurality of acquisition circuits 22. Each acquisition circuit 22 is electrically connected to at least one fingerprint recognition sensor 3. The acquisition circuit 22 includes at least one first thin film transistor 221.

[0073] Among them, Figure 1 As shown, “each acquisition circuit 22 is electrically connected to at least one fingerprint recognition sensor 3”, which means that each acquisition circuit 22 is only connected to one fingerprint recognition sensor 3. In some possible examples, each acquisition circuit 22 may also be connected to multiple fingerprint recognition sensors 3. The present disclosure does not limit the number of fingerprint recognition sensors 3 connected to the acquisition circuit 22.

[0074] In some examples, such as Figure 1 As shown, the first thin film transistor 221 may be a top-gate thin film transistor. In other examples, the first thin film transistor 221 may also be a bottom-gate thin film transistor.

[0075] In some examples, such as Figure 4A and Figure 4B As shown, the first thin film transistor 221 may be a P-type thin film transistor. In some other examples, the first thin film transistor 221 may also be an N-type thin film transistor.

[0076] In some examples, such as Figure 1 As shown, “the acquisition circuit 22 includes at least one thin film transistor 221” may mean that the acquisition circuit 22 includes one thin film transistor 221. In other examples, “the acquisition circuit 22 includes at least one thin film transistor 221” may mean that the acquisition circuit 22 includes multiple thin film transistors 221. The present disclosure does not limit the number of thin film transistors 221, as long as the signal acquisition of the fingerprint recognition sensor 3 can be achieved.

[0077] For example, Figure 4A and Figure 4B As shown, when the acquisition circuit 22 includes only one thin film transistor 221, the control end of the thin film transistor 211 can be connected to the selection signal line XL, and the signal transmitted in the selection signal line XL can control the thin film transistor 221 to be turned on and off, thereby controlling whether the acquisition circuit 22 collects the electrical signal generated by the fingerprint recognition sensor 3. One of the source and the drain of the thin film transistor 221 is connected to the fingerprint recognition sensor 3, and the other is connected to the acquisition signal line CL. Therefore, when the thin film transistor 221 is turned on, the electrical signal generated by the fingerprint recognition sensor 3 can be transmitted to the fingerprint recognition chip through the acquisition signal line CL.

[0078] In some embodiments, Figure 5As shown, the pixel circuit 21 may include at least one second thin film transistor 211 , and the first thin film transistor 221 is disposed in the same layer as the second thin film transistor 211 .

[0079] Exemplarily, the first thin film transistor 221 may include a first active layer pattern 222 , a first gate electrode 223 , a first source electrode 224 , and a first drain electrode 225 . The second thin film transistor 211 may include a second active layer pattern 212 , a second gate electrode 213 , a second source electrode 214 , and a second drain electrode 215 .

[0080] like Figure 5 As shown, “the first thin film transistor 221 and the second thin film transistor 211 are arranged on the same layer”, it can be that the first active layer pattern 222 and the second active layer pattern 212 are arranged on the same layer, the first gate electrode 223 and the second gate electrode 213 are manufactured on the same layer, and the first source electrode 224, the second source electrode 214, the first drain electrode 225 and the second drain electrode 215 are arranged on the same layer.

[0081] The term "same layer" means that the film layer used to form a specific pattern is formed by the same film-forming process, and then the layer structure is formed by a single patterning process using the same mask. Depending on the specific pattern, a single patterning process may include multiple exposure, development or etching processes, and the specific pattern in the formed layer structure may be continuous or discontinuous, and these specific patterns may also be at different heights or have different thicknesses.

[0082] Exemplarily, the first source 224, the second source 214, the first drain 225, and the second drain 215 may be a single-layer structure or a multi-layer structure. When the first source 224, the second source 214, the first drain 225, and the second drain 215 are multi-layer structure layers, the first source 224, the second source 214, the first drain 225, and the second drain 215 may include a titanium metal layer, an aluminum metal layer, and a titanium metal layer stacked and sequentially away from the substrate 1.

[0083] In some embodiments of the present disclosure, the first thin film transistor 221 and the second thin film transistor 211 are arranged in the same layer, that is, during the process of manufacturing the display panel 1, the second thin film transistor 211 and the first thin film transistor 221 can be manufactured at the same time, thereby simplifying the manufacturing process of the display panel 10, reducing the number of mask plates used, and reducing costs.

[0084] In some embodiments, see Figure 1 and Figure 5 The display panel 10 further includes a first insulating layer 6. The first insulating layer 6 is located between the circuit structure layer 2 and the pixel defining layer 4. A plurality of first through holes 61 are provided in the first insulating layer 6, and the photosensitive pattern 33 of the fingerprint recognition sensor 3 is located in the first through holes 61.

[0085] The first electrode 31 is disposed on a side of the photosensitive pattern 33 away from the substrate 1, and the first electrode 31 is configured to transmit a bias voltage V bias The second electrode 32 is disposed on a side of the photosensitive pattern 33 close to the substrate 1 and is disposed in the same layer as the first source 224 and the first drain 225 of the first thin film transistor 221. The second electrode 32 is electrically connected to the first source 224 or the first drain 225 of the first thin film transistor 221 of the corresponding acquisition circuit 22.

[0086] In some examples, such as Figure 5 As shown, the first insulating layer 6 may be a single-layer structure, for example, the first insulating layer 6 includes a planarization layer 62. In other examples, such as Figure 6 As shown, the first insulating layer 6 may also be a multi-layer structure, for example, the first insulating layer 6 may include a passivation layer 63 and a planarization layer 62 which are sequentially away from the substrate 1. When the first insulating layer 6 includes the passivation layer 63 and the planarization layer 62 which are sequentially away from the substrate 1, the first through hole 61 passes through the passivation layer 63 and the planarization layer 62 at the same time.

[0087] In some examples, the plurality of first electrodes 31 may be connected to the same bias voltage V bias In this way, the plurality of first electrodes 31 may be connected to each other first and then connected to the same bias voltage source, thereby reducing the number of bias voltage sources in the display device and reducing the cost.

[0088] It should be noted that the "same layer" in "the second electrode 32 is disposed in the same layer as the first source 224 and the first drain 225 of the first thin film transistor 221" means: a film layer for forming a specific pattern is formed by the same film forming process, and then a layer structure is formed by a single patterning process using the same mask. Depending on the specific pattern, a single patterning process may include multiple exposure, development or etching processes, and the specific pattern in the formed layer structure may be continuous or discontinuous, and these specific patterns may also be at different heights or have different thicknesses.

[0089] Based on this, during the manufacturing process of the display panel 10 , the second electrode 32 and the first source 224 and the first drain 225 of the first thin film transistor 221 can be manufactured using the same mask plate, thereby simplifying the manufacturing process of the display panel 10 and reducing the manufacturing cost of the display panel 10 .

[0090] In some embodiments, Figure 7 As shown, the display panel 10 further includes a first light shielding portion 7. The first light shielding portion 7 is located on a side of the first insulating layer 6 away from the circuit structure layer 2. A second opening 71 is provided in the first light shielding portion 7, and the orthographic projection of the second opening 71 on the substrate 1 at least partially overlaps with the orthographic projection of the photosensitive pattern 33 on the substrate 1.

[0091] In this way, when other light in the environment (light not reflected by the fingerprint) irradiates the side of the fingerprint recognition sensor away from the substrate, the first light shielding portion 7 can block the light, preventing the light not reflected by the fingerprint from irradiating the fingerprint recognition sensor and affecting the recognition result of the fingerprint recognition sensor. When the light reflected by the fingerprint irradiates the side of the fingerprint recognition sensor 3 away from the substrate 1, the light can pass through the second opening 71 in the first light shielding portion 7, thereby irradiating the fingerprint recognition sensor 3 to achieve fingerprint recognition.

[0092] In some embodiments, the material of the first light shielding portion 7 may be an insulating material. In this case, the first light shielding portion 7 may directly contact the first electrode 31 , or the first light shielding portion 7 may directly contact the photosensitive layer 33 .

[0093] In other embodiments, the material of the first light shielding portion 7 may be a conductive material. In some examples, the first light shielding portion 7 may include a multi-layer conductive structure. For example, the first light shielding portion 7 may include an indium tin oxide layer, a silver metal layer, and an indium tin oxide layer that are sequentially away from the substrate 1. When the first light shielding portion 7 is a conductive material, the first light shielding portion 7 is not in contact with the first electrode 31, and the first light shielding portion 7 is not in contact with the photosensitive layer 33.

[0094] For example, see Figure 7 , the first electrode 31 is located in the second opening 71 of the first light shielding portion 7, and there is a gap between the first electrode 31 and the boundary of the first light shielding portion 7 at the second opening 71. In this way, the electrical connection between the first electrode 31 and the first light shielding portion 7 is avoided, which affects the recognition effect of the fingerprint recognition sensor 3.

[0095] In some embodiments, Figure 8 As shown, the display panel 10 may further include a plurality of bias voltage signal lines 8. The plurality of bias voltage signal lines 8 are disposed in the same layer as the first electrode 31. A first notch 72 is disposed in the first light shielding portion 7, and the bias voltage signal line 8 passes through the first notch 72 and is electrically connected to the first electrode 31.

[0096] The term "same layer" means that the film layer used to form a specific pattern is formed by the same film-forming process, and then the layer structure is formed by a single patterning process using the same mask. Depending on the specific pattern, a single patterning process may include multiple exposure, development or etching processes, and the specific pattern in the formed layer structure may be continuous or discontinuous, and these specific patterns may also be at different heights or have different thicknesses.

[0097] like Figure 8As shown, one bias voltage signal line 8 may be electrically connected to one first electrode 31. In other examples, one bias voltage signal line 8 may also be electrically connected to a plurality of first electrodes 31 at the same time.

[0098] In some possible examples, multiple bias voltage lines 8 may be connected to the same bias voltage source.

[0099] In this way, by setting the bias voltage signal line 8 and the first electrode 31 in the same layer, the first electrode 31 and the bias voltage signal line can be manufactured by using one mask plate during the manufacturing process of the display panel 10, which simplifies the manufacturing process of the display panel 10 and reduces the manufacturing cost of the display panel 10.

[0100] In some embodiments, Fig. 9A As shown, a plurality of second through holes 64 are further provided in the first insulating layer 6, each of which surrounds a first through hole 61, and a gap exists between the second through hole 64 and the first through hole 61 it surrounds. The display panel 10 further includes a plurality of second light shielding portions 9, each of which is located in a second through hole 64.

[0101] In this way, each second through hole 64 surrounds a first through hole 61, the photosensitive layer 33 is located in the first through hole 61, and the second shading portion 9 is located in the second through hole 64. When the display panel 10 performs fingerprint recognition, the second shading portion 9 can block the light from the surrounding side that irradiates the photosensitive layer 33 for the fingerprint recognition sensor 3, thereby preventing the light emitted by the light-emitting device and the light reflected by other film layers of the display panel from irradiating the photosensitive layer, affecting the recognition accuracy and sensitivity of the fingerprint recognition sensor.

[0102] In some examples, the second light shielding portion 9 may be made of insulating material.

[0103] In some other examples, the second light shielding portion 9 may be made of a conductive material. Fig. 9A As shown, the first light shielding portion 7 is electrically connected to the second light shielding portion 9 , and the second light shielding portion 9 is electrically connected to the second electrode 32 .

[0104] In some embodiments, Fig. 9A As shown, the first light shielding portion 7 and the second light shielding portion 9 corresponding to the same fingerprint recognition sensor 3 may be an integrated structure. Fig. 9B As shown, the second through hole 64 may be provided with a second notch 641 communicating with the first notch 72 .

[0105] The first insulating layer 6 is not etched at the position corresponding to the second notch 641 , so that the bias voltage signal line 8 extends toward the first electrode 31 on the portion of the first insulating layer 6 corresponding to the second notch 641 and is electrically connected to the first electrode 31 .

[0106] In some embodiments, Fig.10 As shown, along the axial direction Y of the first through hole 61 , the openings at both ends of the first through hole 61 are respectively: a third opening 611 away from the substrate 1 and a fourth opening 612 close to the substrate 1 .

[0107] The orthographic projection of the third opening 611 on the substrate 1 is within the range of the orthographic projection of the fourth opening 612 on the substrate 1 , and there is a gap between the boundary of the orthographic projection of the third opening 611 on the substrate 1 and the boundary of the orthographic projection of the fourth opening 612 on the substrate 1 .

[0108] In this way, the size of the third opening 611 away from the substrate 1 is smaller than the size of the fourth opening 612 close to the substrate 1, so that when light is irradiated from the side of the fingerprint recognition sensor 3 away from the substrate 1 to the fingerprint recognition sensor, the fingerprint recognition sensor 3 can only receive the light reflected by the fingerprint, thereby preventing other light from affecting the recognition result of the fingerprint recognition sensor 3.

[0109] At the same time, when the first light shielding portion 7 and the second light shielding portion 9 are made of conductive materials, it is also possible to avoid direct contact between the first light shielding portion 7 and the photosensitive layer 33 arranged in the first through hole 61. The second light shielding portion 9 simultaneously connects the first light shielding portion 7 in contact with the photosensitive layer 33 and the second electrode 32 in contact with the photosensitive layer 33, causing a short circuit in the fingerprint recognition sensor, thereby improving the use stability of the fingerprint recognition sensor 3.

[0110] In some embodiments, the first electrode 31 can be configured as a cathode, and the second electrode 32 can be configured as an anode. In this case, the fingerprint recognition sensor 3 can be a positive structure, and the fingerprint recognition circuit can be as follows: Figure 4A shown.

[0111] In other embodiments, the first electrode 31 may be configured as an anode, and the second electrode 32 may be configured as a cathode. In this case, the fingerprint recognition sensor 3 may be an inverted structure, and the fingerprint recognition circuit may be as follows: Figure 4B shown.

[0112] In some embodiments, Fig.11A and Fig. 11B As shown, the display panel 10 further includes an encapsulation layer 91 , which is disposed on a side of the light emitting device layer 5 away from the substrate 1 .

[0113] The encapsulation layer 91 is used to encapsulate the plurality of light emitting devices 51 onto the substrate 1 . The encapsulation layer 91 can also prevent water vapor and oxygen from entering the light emitting devices 51 , thereby ensuring that the light emitting devices 51 can emit light normally.

[0114] Among them, multiple fingerprint recognition sensors 3 are located on a side of the encapsulation layer 91 away from the substrate 1. The display panel 10 includes a first electrode layer 101, a photosensitive layer 102, and a second electrode layer 103 that are stacked, and the second electrode layer 103 is close to or far away from the substrate 1 relative to the first electrode layer 101. The first electrodes 31 of the multiple fingerprint recognition sensors 3 are located in the first electrode layer 101 and are connected to each other, the photosensitive patterns 33 of the multiple fingerprint recognition sensors 3 are located in the photosensitive layer 102 and are connected to each other, and the second electrodes 32 of the multiple fingerprint recognition sensors 3 are located in the second electrode layer 103 and are independently arranged.

[0115] Based on this, when the display panel 10 is used for fingerprint recognition, the fingerprint recognition sensor 3 is closer to the finger, and the light reflected back from the finger to the display panel 10 can pass through fewer film layers to reach the photosensitive pattern 33, the light energy loss is smaller, and the fingerprint recognition sensor 3 obtains more fingerprint information, the fingerprint recognition sensor 3 has a better recognition effect, and a higher accuracy rate.

[0116] In some examples, such as Fig.11A As shown, the second electrode layer 103 is located on a side of the first electrode layer 101 close to the substrate 1 .

[0117] In other examples, such as Fig. 11B As shown, the second electrode layer 103 is located on a side of the first electrode layer 101 away from the substrate 1 .

[0118] The first electrode 31 can be used to transmit a bias voltage, and the independently arranged second electrode 32 can be used to transmit a fingerprint recognition signal generated by the fingerprint recognition sensor 3 .

[0119] When the second electrode layer 103 is located on a side of the first electrode layer 101 close to the substrate 1, for example, the first electrode 31 can be configured as a cathode and the second electrode 32 can be configured as an anode. In this case, the fingerprint recognition sensor 3 can be in a positive structure.

[0120] When the second electrode layer 103 is located on a side of the first electrode layer 101 close to the substrate 1, for example, the first electrode 31 can be configured as an anode and the second electrode 32 can be configured as a cathode. At this time, the fingerprint recognition sensor 3 can be an inverted structure.

[0121] When the second electrode layer 103 is located on a side of the first electrode layer 101 away from the substrate 1, for example, the first electrode 31 can be configured as a cathode and the second electrode 32 can be configured as an anode. In this case, the fingerprint recognition sensor 3 can be an inverted structure.

[0122] When the second electrode layer 103 is located on a side of the first electrode layer 101 away from the substrate 1, for example, the first electrode 31 can be configured as an anode and the second electrode 32 can be configured as a cathode. In this case, the fingerprint recognition sensor 3 can be in a positive structure.

[0123] It is worth noting that when the second electrode layer 103 is located on the side of the first electrode layer 101 close to the substrate 1, in order to prevent the light emitted by the light-emitting device 51 from directly irradiating the photosensitive pattern 33 through the second electrode 32, the material of the second electrode 32 can be metal, such as copper, aluminum, etc.

[0124] Of course, in order for the light reflected from the fingerprint back to the display panel 10 to pass through the first electrode 31 and be sensed by the photosensitive pattern, the material of the first electrode 31 may be a transparent conductive material, such as indium tin oxide.

[0125] When the second electrode layer 103 is located on the side of the first electrode layer 101 away from the substrate 1, in order to prevent the light emitted by the light-emitting device 51 from being directly irradiated into the photosensitive pattern 33 through the first electrode 31, the material of the first electrode 31 may be a metal, such as copper, aluminum, etc. In order for the light reflected from the fingerprint back to the display panel 10 to pass through the second electrode 32 and be sensed by the photosensitive pattern 33, the material of the second electrode 32 may be a transparent conductive material, such as indium tin oxide.

[0126] In some embodiments, Fig. 12A and Fig. 12B As shown, a plurality of third through holes 104 are provided in the first electrode layer 101 and the photosensitive layer 102 , and the orthographic projection of each third through hole 104 on the substrate 1 at least partially overlaps with the orthographic projection of at least one first opening 41 on the substrate 1 .

[0127] Among them, Fig. 12A and Fig. 12B As shown, “the orthographic projection of each third through hole 104 on the substrate 1 at least partially overlaps with the orthographic projection of at least one first opening 41 on the substrate 1 ” may mean that the orthographic projection of each third through hole 104 on the substrate 1 at least partially overlaps with the orthographic projection of one first opening 41 on the substrate 1 .

[0128] Alternatively, “the orthographic projection of each third through hole 104 on the substrate 1 at least partially overlaps with the orthographic projection of at least one first opening 41 on the substrate 1 ” may also mean that the orthographic projections of each third through hole 104 and the plurality of first openings 41 on the substrate 1 at least partially overlap.

[0129] “At least partially overlap” means that the orthographic projection of the third through hole 104 on the substrate 1 may partially overlap or completely overlap with the orthographic projection of at least one first opening 41 on the substrate 1 .

[0130] By such arrangement, at least part of the light emitted by the light emitting device 51 can pass through the first electrode layer 101 and the photosensitive layer 102 through the third through hole 104, thereby reducing the loss of the light emitted by the light emitting device 51 in the first electrode layer 101 and the photosensitive layer 102, enhancing the light output brightness of the display panel 10, and improving the display effect of the display panel 10. When the light emitted by the light emitting device 51 irradiates the fingerprint and is then reflected back to the display panel 10 by the fingerprint, the intensity of the reflected light is higher, which is conducive to improving the accuracy of the detection result of the fingerprint recognition sensor 3.

[0131] When each third through hole 104 completely overlaps with the orthographic projection of a first opening 411 on the substrate 1, the mask plate for making the first electrode layer 101 and the photosensitive layer 102 and the mask plate for making the pixel defining layer 4 can be the same, thereby reducing the number of mask plates used in the manufacturing process of the display panel 10 and reducing the manufacturing cost of the display panel 10.

[0132] In some embodiments, Fig.13 As shown, the display panel 10 further includes an anti-reflection layer 105. The anti-reflection layer 105 is located on a side of the plurality of fingerprint identification sensors 3 away from the encapsulation layer 91. A plurality of fourth through holes 106 and a plurality of fifth through holes 107 are provided in the anti-reflection layer 105, and the orthographic projection of each fourth through hole 106 on the substrate 1 at least partially overlaps with the orthographic projection of at least one second electrode 32 on the substrate 1, and the orthographic projection of each fifth through hole 107 on the substrate 1 at least partially overlaps with the orthographic projection of at least one first opening 41 on the substrate 1.

[0133] For example, the material of the anti-reflection layer 105 may be molybdenum oxide.

[0134] The orthographic projection of the fourth through hole 106 on the substrate 1 may at least partially overlap with the orthographic projection of one second electrode 32 on the substrate 1 , or may at least partially overlap with the orthographic projections of multiple second electrodes 32 on the substrate 1 .

[0135] “The orthographic projection of each fourth through hole 106 on the substrate 1 at least partially overlaps with the orthographic projection of at least one second electrode 32 on the substrate 1” may, for example, mean that the orthographic projection of the fourth through hole 106 on the substrate 1 partially overlaps with the orthographic projection of at least one second electrode 32 on the substrate 1, or that the orthographic projection of the fourth through hole 106 on the substrate 1 completely overlaps with the orthographic projection of at least one second electrode 32 on the substrate 1.

[0136] Similarly, the orthographic projection of the fifth through hole 107 on the substrate 1 may at least partially overlap with the orthographic projection of one first opening 41 on the substrate 1 , or may at least partially overlap with the orthographic projections of multiple first openings 41 on the substrate 1 .

[0137] “The orthographic projection of each fifth through hole 107 on the substrate 1 at least partially overlaps with the orthographic projection of at least one first opening 41 on the substrate 1” can, for example, mean that the orthographic projection of each fifth through hole 107 on the substrate 1 partially overlaps with the orthographic projection of at least one first opening 41 on the substrate 1, or that the orthographic projection of each fifth through hole 107 on the substrate 1 completely overlaps with the orthographic projection of at least one first opening 41 on the substrate 1.

[0138] Exemplarily, the orthographic projections of the fourth through hole 106 and the fifth through hole 107 on the substrate may be approximately circular or approximately rectangular.

[0139] Here, "substantially" refers to the shapes described and shapes that are similar to the described shapes as a whole. For example, for "substantially circular", it can be a circle or a shape that is similar to a circle as a whole, and at least part of the boundary of the shape is allowed to be different from at least part of the boundary of the circle, that is, at least part of the boundary of the shape is allowed to be non-curved, for example, at least part of the boundary of the shape can be a zigzag shape, etc.

[0140] By providing the anti-reflection layer 105 , the light reflectivity of the display panel 10 can be reduced (for example, to 4% to 5%), thereby improving the display effect of the display panel 10 and avoiding mutual interference between the light reflected by the display panel 10 and the light displayed by the display panel 10 .

[0141] By providing a plurality of fourth through holes 106 in the anti-reflection layer 105, the anti-reflection layer 105 can expose a plurality of fingerprint recognition sensors 3, so that the light reflected by the fingerprint and entering the display panel 10 can enter the plurality of fingerprint recognition sensors 3 through the plurality of fourth through holes 106, respectively, to achieve fingerprint recognition. At the same time, it can prevent the light not reflected by the fingerprint from entering the fingerprint recognition sensor 3, thereby improving the accuracy of the fingerprint recognition sensor detection structure.

[0142] By setting a plurality of fifth through holes 107 in the anti-reflection layer 105 , light emitted by the light emitting device can directly pass through the anti-reflection layer through the fifth through holes 107 , thereby avoiding the situation where the light intensity is weakened after passing through the anti-reflection layer 105 , thereby ensuring the light extraction efficiency of the display panel 10 .

[0143] Some possible examples include Fig.13 As shown, the orthographic projection of the fourth through hole 106 on the substrate 1 is located within the range of the orthographic projection of the second electrode 32 on the substrate 1 , and there is a gap between the boundary of the orthographic projection of the fourth through hole 106 on the substrate 1 and the boundary of the orthographic projection of the second electrode 32 on the substrate 1 .

[0144] By such arrangement, the anti-reflection layer 105 can further block other light in the environment, and prevent light not reflected by fingerprints from irradiating the fingerprint recognition sensor and affecting the detection result of the fingerprint recognition sensor.

[0145] In some embodiments, Fig.14 As shown, the fingerprint recognition sensor 3 is configured to be connected to the touch control chip 20, so that the fingerprint recognition sensor 3 is reused as a component for sensing a touch position.

[0146] For example, the display panel 10 can realize the functions of fingerprint recognition and touch recognition in a time-sharing manner by mode switching. For example, in a first time period, the fingerprint recognition sensor 3 is configured to perform fingerprint recognition, and in a second time period, the fingerprint recognition sensor 3 is configured to perform touch recognition.

[0147] In some embodiments, Fig.15A and Fig. 15B As shown, the photosensitive pattern 33 includes a stacked electron transport layer 331, an active layer 332, and a hole transport layer 333. The material of the electron transport layer 331 includes aluminum-doped zinc oxide, and the material of the hole transport layer 333 includes molybdenum oxide.

[0148] like Fig.16 As shown, the energy of the HOMO (Highest Occupied Molecular Orbital) energy level of molybdenum oxide (MoO3) is -5.3eV, and the energy of the LUMO (Lowest Unoccupied Molecular Orbital) energy level is -2.3eV. Compared with PEDOT:PSS (poly 3,4-ethylenedioxythiophene / polystyrene sulfonate) used in the related art, the LUMO energy level of molybdenum oxide is higher, which is conducive to improving the electron injection barrier, and the energy level difference between the HOMO energy level and the LUMO energy level is larger. Therefore, while the hole transport ability is strong, the electron blocking ability of molybdenum oxide is also strong. In this way, when the material of the hole transport layer 333 includes molybdenum oxide, the hole transport layer 333 can also have the function of an electron blocking layer, which is conducive to reducing the dark current density of the fingerprint recognition sensor and reducing noise.

[0149] like Fig.16As shown, the energy of the HOMO energy level of aluminum-doped zinc oxide (AZO) is less than -7eV, and the energy of the LUMO energy level is -3.9eV. Compared with PDINO used in the related art, the LUMO energy level of aluminum-doped zinc oxide is lower and the electron transport ability is stronger. And the HOMO energy level of aluminum-doped zinc oxide is lower, which is conducive to improving the barrier for hole injection, and the energy level difference between the HOMO energy level and the LUMO energy level is greater, which is conducive to aggravating the depletion of holes in aluminum-doped zinc oxide. In this way, when the material of the electron transport layer 331 includes aluminum-doped zinc oxide, the electron transport layer 331 can also have the function of a hole blocking layer, which is conducive to reducing the dark current density of the fingerprint recognition sensor 3 and reducing noise.

[0150] For example, the material of the active layer 332 may be a mixture of a donor and an acceptor in a common solvent, wherein the common solvent may include, for example, a 1,2-dichlorobenzene solution.

[0151] In some examples, the donor may be: 3-hexyl substituted polythiophene (Poly (3-hexylthiophene), referred to as P3HT). The acceptor may be: Phenyl-C61-butyric acid methyl ester (PCBM) or PC60BM. Among them, the HOMO energy level of P3HT may be -5.1eV, and the LUMO energy level may be -3.0eV. The HOMO energy level of PCBM may be -5.9eV, and the LUMO energy level may be -3.9eV. The HOMO energy level of PC60BM may be -2.2eV, and the LUMO energy level may be -1.8eV.

[0152] In other examples, the donor may be Y6 and the acceptor may be PM6, wherein the HOMO energy level of Y6 may be -5.65 eV and the LUMO energy level may be -4.05 eV, and the HOMO energy level of PM6 may be -5.5 eV and the LUMO energy level may be -3.61 eV.

[0153] It should be noted that the materials of the donor and the acceptor in the present disclosure are not limited thereto.

[0154] Based on this, when the fingerprint recognition sensor 3 is an inverted structure, for example, the dark current density of the fingerprint recognition sensor 3 can be 2×10 -7 mA / cm 2 , the reverse bias voltage can be -3V to -6V.

[0155] Among them, when the fingerprint recognition sensor 3 is an inverted structure, the charge collection efficiency can be improved and the external quantum efficiency can be improved.

[0156] like Fig.17 As shown, some embodiments of the present disclosure further provide a display device 100, comprising the display panel 10 as described in any of the above embodiments.

[0157] The display device 100 may be any component with a display function, such as a television, a digital camera, a mobile phone, a watch, a tablet computer, a notebook computer, a navigator, or the like.

[0158] The beneficial effects that can be achieved by the display device 100 provided in some embodiments of the present disclosure are the same as the beneficial effects that can be achieved by the display panel 10 provided by the above technical solution, and are not elaborated here.

[0159] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A display panel, characterized in that: include: substrate; A circuit structure layer, disposed on the substrate, the circuit structure layer comprising a plurality of pixel circuits; A plurality of fingerprint recognition sensors, comprising a first electrode, a second electrode and a photosensitive pattern located between the first electrode and the second electrode; A pixel defining layer is disposed on a side of the circuit structure layer away from the substrate; a plurality of first openings are disposed in the pixel defining layer; The orthographic projections of the plurality of first openings on the substrate are staggered from the orthographic projections of the plurality of fingerprint recognition sensors on the substrate; A light-emitting device layer is arranged on a side of the circuit structure layer away from the substrate; the light-emitting device layer includes a plurality of light-emitting devices, each of which is arranged corresponding to one of the first openings and is electrically connected to one pixel circuit; A first light shielding portion, located at a side of the photosensitive pattern away from the circuit structure layer; A second opening is provided in the first light shielding portion, and an orthographic projection of the second opening on the substrate at least partially overlaps with an orthographic projection of the photosensitive pattern on the substrate; The first electrode is located in the second opening, and a gap is formed between the first electrode and a boundary of the first light shielding portion at the second opening.

2. The display panel according to claim 1, characterized in that: The circuit structure layer also includes: A plurality of acquisition circuits, each of which is electrically connected to at least one fingerprint recognition sensor; the acquisition circuit comprises at least one first thin film transistor.

3. The display panel according to claim 2, characterized in that: The display panel further includes: A first insulating layer is located between the circuit structure layer and the pixel defining layer; a plurality of first through holes are provided in the first insulating layer, and the photosensitive pattern of the fingerprint recognition sensor is located in the first through holes; Wherein, the first electrode is arranged on a side of the photosensitive pattern away from the substrate, and the first electrode is configured to transmit a bias voltage; The second electrode is arranged on a side of the photosensitive pattern close to the substrate and is arranged in the same layer as the first source and the first drain of the first thin film transistor; the second electrode is electrically connected to the first source or the first drain of the first thin film transistor of the corresponding acquisition circuit.

4. The display panel according to claim 3, characterized in that: The display panel further includes: The first light shielding portion is located on a side of the first insulating layer away from the circuit structure layer.

5. The display panel according to claim 4, characterized in that: The display panel further includes: A plurality of bias voltage signal lines are arranged in the same layer as the first electrode; a first notch is arranged in the first light shielding portion, and the bias voltage signal line passes through the first notch and is electrically connected to the first electrode.

6. The display panel according to claim 4, characterized in that: A plurality of second through holes are also provided in the first insulating layer, each second through hole surrounds a first through hole, and a gap exists between the second through hole and the first through hole surrounded by the second through hole; The display panel further includes: A plurality of second light shielding portions are provided, and each second light shielding portion is located in one of the second through holes.

7. The display panel according to claim 6, characterized in that: The first light shielding portion is electrically connected to the second light shielding portion, and the second light shielding portion is electrically connected to the second electrode.

8. The display panel according to claim 3, characterized in that: Along the axial direction of the first through hole, the openings at both ends of the first through hole are respectively: a third opening away from the substrate and a fourth opening close to the substrate; The orthographic projection of the third opening on the substrate is within the range of the orthographic projection of the fourth opening on the substrate, and there is a gap between a boundary of the orthographic projection of the third opening on the substrate and a boundary of the orthographic projection of the fourth opening on the substrate.

9. The display panel according to any one of claims 2 to 8, characterized in that: The pixel circuit includes at least one second thin film transistor, and the first thin film transistor and the second thin film transistor are arranged in the same layer.

10. The display panel according to claim 1, characterized in that: The display panel further includes: An encapsulation layer, disposed on a side of the light-emitting device layer away from the substrate; Wherein, the plurality of fingerprint recognition sensors are located on a side of the packaging layer away from the substrate; The display panel includes a first electrode layer, a photosensitive layer, and a second electrode layer which are stacked, and the second electrode layer is close to or far away from the substrate relative to the first electrode layer; the first electrodes of the multiple fingerprint recognition sensors are located in the first electrode layer and are interconnected, the photosensitive patterns of the multiple fingerprint recognition sensors are located in the photosensitive layer and are connected to each other, and the second electrodes of the multiple fingerprint recognition sensors are located in the second electrode layer and are independently arranged.

11. The display panel according to claim 10, characterized in that: A plurality of third through holes are provided in the first electrode layer and the photosensitive layer, and an orthographic projection of each third through hole on the substrate at least partially overlaps with an orthographic projection of at least one of the first openings on the substrate.

12. The display panel according to claim 10, characterized in that: The display panel further includes: An anti-reflection layer is located on a side of the multiple fingerprint recognition sensors away from the packaging layer; a plurality of fourth through holes and a plurality of fifth through holes are provided in the anti-reflection layer, an orthographic projection of each fourth through hole on the substrate at least partially overlaps with an orthographic projection of at least one of the second electrodes on the substrate, and an orthographic projection of each fifth through hole on the substrate at least partially overlaps with an orthographic projection of at least one of the first openings on the substrate.

13. The display panel according to any one of claims 10 to 12, characterized in that: The fingerprint recognition sensor is configured to be connected to a touch control chip so that the fingerprint recognition sensor is reused as a component for sensing a touch position.

14. The display panel according to claim 1, characterized in that: The photosensitive pattern includes an electron transport layer, an active layer and a hole transport layer which are stacked; the material of the electron transport layer includes aluminum-doped zinc oxide, and the material of the hole transport layer includes molybdenum oxide.

15. A display device, characterized in that: include: The display panel according to any one of claims 1 to 14.

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