CN113675251A

CN113675251A - Display panel and display device

Info

Publication number: CN113675251A
Application number: CN202110970542.1A
Authority: CN
Inventors: 王晶; 李然; 田宏伟; 樊宜冰; 陈善韬; 单真真; 刘政
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2021-11-19

Abstract

The utility model provides a display panel and display device relates to and shows technical field for show picture and fingerprint identification carry out. The display panel comprises a substrate, a circuit structure layer, a plurality of fingerprint identification sensors, a pixel defining layer and a light emitting device layer. The circuit structure layer includes a plurality of pixel circuits. The fingerprint identification sensor comprises a first electrode, a second electrode and a photosensitive pattern located between the first electrode and the second electrode. The pixel defining layer is arranged on one side of the circuit structure layer, which is far away from the substrate; a plurality of first openings are arranged in the pixel defining layer; the orthographic projection of the first openings on the substrate is staggered with the orthographic projection of the fingerprint identification sensors on the substrate. The light emitting device layer includes a plurality of light emitting devices, each of which is disposed corresponding to one of the first openings and electrically connected to one of the pixel circuits. This is disclosed with a plurality of fingerprint identification sensors integration in display panel for realize display device's fingerprint identification under the screen, improve fingerprint identification's accuracy.

Description

Display panel and display device

Technical Field

The present disclosure relates to the field of display technologies, and in particular, to a display panel and a display device.

Background

With the development of display technology, fingerprint identification has been widely applied to electronic devices such as smart phones, tablet computers, intelligent wearable devices and the like. Generally, the fingerprint recognition module can be integrated in three different locations of the electronic device. That is, the fingerprint identification module may be integrated in any one or more of the locations at the back side of the electronic device, the bezel, and the display side bottom power key, etc.

With the emergence of the concept of comprehensive screen, the identification of fingerprint under the screen becomes another research hotspot in the display field. In the related art, the optical fingerprint recognition module is disposed at the back side of the display panel to realize the fingerprint recognition function. However, the optical fingerprint recognition module is far away from the finger, the light path of the light reflected by the finger and entering the optical fingerprint recognition sensor is complex, the light loss is large, and the accuracy of the fingerprint recognition result is low.

Disclosure of Invention

The utility model aims to provide a display panel and display device for realize fingerprint identification under the display device screen, improve fingerprint identification's accuracy.

In order to achieve the above object, the present disclosure provides the following technical solutions:

in one aspect, a display panel is provided. The display panel includes a substrate, a circuit structure layer, a plurality of fingerprint recognition sensors, a pixel defining layer, and a light emitting device layer. And the circuit structure layer is arranged on the substrate and comprises a plurality of pixel circuits. The fingerprint identification sensor comprises a first electrode, a second electrode and a photosensitive pattern located between the first electrode and the second electrode. The pixel defining layer is arranged on one side of the circuit structure layer, which is far away from the substrate; a plurality of first openings are arranged in the pixel defining layer; an orthographic projection of the first plurality of openings on the substrate is staggered from an orthographic projection of the fingerprint identification sensors on the substrate; the light-emitting device layer is arranged on one side, far away from the substrate, of the circuit structure layer; the light emitting device layer includes a plurality of light emitting devices, each of which is disposed corresponding to one of the first openings and electrically connected to one of the pixel circuits.

In some embodiments, the circuit structure layer further comprises a plurality of acquisition circuits, each acquisition circuit being electrically connected to at least one fingerprint identification sensor; the acquisition circuit comprises at least one first thin film transistor.

In some embodiments, the display panel further comprises a first insulating layer. A first insulating layer between the circuit structure layer and the pixel defining layer; a plurality of first through holes are formed in the first insulating layer, and the photosensitive pattern of the fingerprint identification sensor is located in the first through holes. Wherein the first electrode is arranged at one side of the photosensitive pattern far away from the substrate, and the first electrode is configured to transmit bias voltage; the second electrode is arranged on one side of the photosensitive pattern close to the substrate and is arranged on the same layer as the first source electrode and the first drain electrode of the first thin film transistor; the second electrode is electrically connected with a first source electrode or a first drain electrode of the first thin film transistor of the corresponding acquisition circuit.

In some embodiments, the display panel further comprises: the first shading part is positioned on one side, far away from the circuit structure layer, of the first insulating layer; the first shading part is provided with a second opening, and the orthographic projection of the second opening on the substrate is at least partially overlapped with the 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 the boundary of the first shading portion at the second opening.

In some embodiments, the display panel further comprises a plurality of bias voltage signal lines disposed in the same layer as the first electrodes; the first shading part is provided with a first notch, and the bias voltage signal wire penetrates through the first notch to be electrically connected with the first electrode.

In some embodiments, a plurality of second through holes are further disposed in the first insulating layer, each second through hole surrounds one first through hole, and a gap is formed between each second through hole and the first through hole surrounded by the second through hole; the display panel further includes: and each second shading part is positioned in one second through hole.

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.

In some embodiments, in the axial direction of the first through hole, the openings at both ends of the first through hole are respectively: a third opening distal from the substrate and a fourth opening proximal 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 a gap is arranged 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.

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 disposed in the same layer.

In some embodiments, the display panel further comprises an encapsulation layer disposed on a side of the light emitting device layer away from the substrate; wherein the plurality of fingerprint identification sensors are positioned on one side of the packaging layer away from the substrate; the display panel comprises a first electrode layer, a photosensitive layer and a second electrode layer which are stacked, wherein the second electrode layer is close to or far away from the substrate relative to the first electrode layer; the first electrodes of the fingerprint identification sensors are located on the first electrode layer and are connected with each other, the photosensitive patterns of the fingerprint identification sensors are located on the photosensitive layer and are connected with each other, and the second electrodes of the fingerprint identification sensors are located on the second electrode layer and are arranged independently.

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.

In some embodiments, the display panel further comprises a reflection reducing layer on a side of the plurality of fingerprint identification sensors away from the encapsulation layer; the antireflection layer is provided with a plurality of fourth through holes and a plurality of fifth through holes, an orthographic projection of each fourth through hole on the substrate at least partially overlaps with an orthographic projection of at least one second electrode 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 first opening on the substrate.

In some embodiments, the fingerprint sensor is configured to be connected to a touch chip such that the fingerprint sensor is multiplexed as a component for sensing a touch position.

In some embodiments, the photosensitive pattern includes an electron transport layer, an active layer, and a hole transport layer disposed in a stack; the material of the electron transport layer comprises aluminum-doped zinc oxide, and the material of the hole transport layer comprises molybdenum oxide.

In another aspect, a display device is provided, which includes the display panel according to any one of the above embodiments.

The display panel and the display device provided by the disclosure have the following beneficial effects:

the display panel that this disclosure provided, with a plurality of fingerprint identification sensor integration in display panel, when making display panel realize the display frame, realize the fingerprint identification function, and then make the display device who adopts this display panel can realize fingerprint identification under the screen, be favorable to adopting this display panel's display device to realize comprehensive screen design, reduce the frame. In with the correlation technique, compare a plurality of fingerprint identification sensor settings at the display panel dorsal part, the fingerprint identification sensor that this disclosure provided is nearer apart from the finger, and less rete can be passed by the light of finger reflection and shine to the fingerprint identification sensor to be favorable to improving the discernment degree of accuracy of fingerprint identification sensor.

The beneficial effects that the display device that this disclosure can realize are the same with the beneficial effects that display panel that above-mentioned technical scheme provided can reach, do not repeat here.

Drawings

In order to more clearly illustrate the technical solutions in the present disclosure, the drawings needed to be used in some embodiments of the present disclosure will be briefly described below, and it is apparent that the drawings in the following description are only drawings of some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art according to the drawings. Furthermore, the drawings in the following description may be regarded as schematic diagrams, and do not limit the actual size of products, the actual flow of methods, the actual timing of signals, and the like, involved in the embodiments of the present disclosure.

FIG. 1 is a block diagram of a display panel according to some embodiments;

FIG. 2 is a schematic diagram of a fingerprint identification according to some embodiments;

FIG. 3A is a top view of a display panel according to some embodiments;

FIG. 3B is a top view of another display panel according to some embodiments;

FIG. 4A is a diagram of a fingerprinting circuit according to some embodiments;

FIG. 4B is another fingerprinting circuit diagram according to some embodiments;

FIG. 5 is a block diagram of another display panel according to some embodiments;

FIG. 6 is a block diagram of yet another display panel according to some embodiments;

FIG. 7 is a block diagram of yet another display panel in accordance with some embodiments;

FIG. 8 is a block diagram of yet another display panel in accordance with some embodiments;

FIG. 9A is a block diagram of yet another display panel in accordance with some embodiments;

FIG. 9B is a block diagram of yet another display panel in accordance with some embodiments;

FIG. 10 is a block diagram of yet another display panel in accordance with some embodiments;

FIG. 11A is a block diagram of yet another display panel in accordance with some embodiments;

FIG. 11B is a block diagram of yet another display panel in accordance with some embodiments;

FIG. 12A is a block diagram of yet another display panel according to some embodiments;

FIG. 12B is a block diagram of yet another display panel in accordance with some embodiments;

FIG. 13 is a block diagram of yet another display panel in accordance with some embodiments;

FIG. 14 is a block diagram of a touch circuit according to some embodiments;

FIG. 15A is a block diagram of yet another display panel according to some embodiments;

FIG. 15B is a block diagram of yet another display panel in accordance with some embodiments;

FIG. 16 is a graph of energy level distribution for a fingerprint recognition sensor according to some embodiments;

FIG. 17 is a block diagram of a display device according to some embodiments.

Detailed Description

Technical solutions in some embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided by the present disclosure belong to the protection scope of the present disclosure.

Throughout the specification and claims, the term "comprising" is to be interpreted in an open, inclusive sense, i.e., as "including, but not limited to," unless the context requires otherwise. In the description herein, the terms "one embodiment," "some embodiments," "example," "particular example" or "some examples" or the like are intended to indicate that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the disclosure. The schematic representations of the above terms are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be included in any suitable manner in any one or more embodiments or examples.

In the following, the terms "first", "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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present disclosure, "a plurality" means two or more unless otherwise specified.

In describing some embodiments, the expression "connected" and its derivatives may be used. For example, the term "connected" may be used in describing some embodiments to indicate that two or more elements are in direct physical or electrical contact with each other. The embodiments disclosed herein are not necessarily limited to the contents herein.

"at least one of A, B and C" has the same meaning as "A, B or at least one of C," each including the following combination of A, B and C: a alone, B alone, C alone, a and B in combination, a and C in combination, B and C in combination, and A, B and C in combination.

"A and/or B" includes the following three combinations: a alone, B alone, and a combination of A and B.

The use of "configured to" herein means open and inclusive language that does not exclude devices that are suitable or configured to perform additional tasks or steps.

Additionally, the use of "based on" means open and inclusive, as a process, step, calculation, or other action that is "based on" one or more stated conditions or values may in practice be based on additional conditions or values beyond those stated.

As used herein, "about," "approximately," or "approximately" includes the stated values as well as average values that are within an acceptable range of deviation for the particular value, as determined by one of ordinary skill in the art in view of the measurement in question and the error associated with measurement of the particular quantity (i.e., the limitations of the measurement system).

As used herein, "parallel," "perpendicular," and "equal" include the stated case and cases that approximate the stated case to within an acceptable range of deviation as determined by one of ordinary skill in the art in view of the measurement in question and the error associated with the measurement of the particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallel and approximately parallel, where an acceptable deviation from approximately parallel may be, for example, within 5 °; "perpendicular" includes absolute perpendicular and approximately perpendicular, where an acceptable deviation from approximately perpendicular may also be within 5 °, for example. "equal" includes absolute and approximate equality, where the difference between the two, which may be equal within an acceptable deviation of approximately equal, is less than or equal to 5% of either.

Example embodiments are described herein with reference to cross-sectional and/or plan views as idealized example figures. In the drawings, the thickness of layers and regions are exaggerated for clarity. Variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, the exemplary embodiments should not be construed as limited to the shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Thus, the regions illustrated in the figures are schematic in nature and their shapes are not intended to illustrate the actual shape of a region of a device and are not intended to limit the scope of the exemplary embodiments.

As shown in fig. 1, 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 defining layer 4, and a light emitting device layer 5. Wherein, the circuit structure layer 2 is arranged 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 between the first electrode 31 and the second electrode 32. The pixel defining 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 provided in the pixel defining layer 4. The orthographic projection of the first openings 41 on the substrate 1 is offset from the orthographic projection of the fingerprint sensor 3 on the substrate 1. The light-emitting device layer 5 is arranged on one side of the circuit structure layer 2 far away from the substrate 1; the light emitting device layer 5 includes a plurality of light emitting devices 51. Each of the light emitting devices 51 is electrically connected to one of the pixel circuits 21. Wherein the orthographic projection of the plurality of fingerprint recognition sensors 3 on the substrate 1 is staggered with the orthographic projection of the plurality of light emitting devices 51 on the substrate 1.

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

Illustratively, the light emitting device 51 may be an organic light emitting diode. At this time, as shown in fig. 1, the light emitting device 51 may include a third electrode 511, a fourth electrode 512, and an organic light emitting layer 513 between the third electrode 511 and the fourth electrode 512.

"each light emitting device 51 is electrically connected to one pixel circuit 21" may be, for example, that the third electrode 511 of each light emitting device 51 is connected to one pixel circuit 21.

In some examples, the third electrode 511 may have a single-layer structure or a multi-layer structure. When the third electrode 511 has a multilayer structure, the third electrode 511 may include, for example, an indium tin oxide layer, a silver metal layer, and an indium tin oxide layer, which are sequentially stacked.

Here, the number and size of the light emitting devices 51 are not limited in this disclosure, as long as normal display of the display panel 10 can be achieved.

Some embodiments of the present disclosure integrate a plurality of fingerprint identification sensors 3 in display panel 10, make display panel 10 can realize the fingerprint identification function when showing the picture, and then make the display device who adopts this display panel 10 can realize fingerprint identification under the screen, are favorable to adopting the display device of this display panel 10 to realize comprehensive screen design, reduce the frame. Compared with the related art in which a plurality of fingerprint recognition sensors are disposed 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 and irradiate into the fingerprint recognition sensor 3, thereby facilitating improvement of the recognition accuracy of the fingerprint recognition sensor 3.

Among them, the plurality of light emitting devices 51 in the display panel 10 may be used not only for displaying a picture but also as a light source of the plurality of fingerprint recognition sensors 3. Referring to fig. 2, the light L emitted from the light emitting device 51 exits to a side of the light emitting device 51 away from the substrate 1 and irradiates a finger outside the display panel 10, and the light L is reflected by the finger and re-enters the display panel 10, so as to be received by the fingerprint sensor 3. The fingerprint recognition sensor 3 generates an electrical signal according to the light reflected by the finger back to the display panel 10, and outputs the electrical signal to the fingerprint recognition chip, so as to realize fingerprint recognition.

When a plurality of light emitting devices 51 are used as the light sources of a plurality of fingerprint recognition sensors 3, one light emitting device 51 may be used as the light source of one fingerprint recognition sensor 3, or may be used as the light source of a plurality of fingerprint recognition sensors 3 at the same time, or a plurality of light emitting devices 51 may be used as the light source of one fingerprint recognition sensor 3 at the same time.

The present disclosure does not limit the number and size of the fingerprint recognition sensors 3 and the distribution positions of the fingerprint recognition sensors 3.

In some examples, as shown in fig. 3A, the fingerprint recognition sensors 3 may be distributed in a specific area S of the display panel 10 for implementing a fingerprint recognition function of the display panel 10 within the specific area S. For example, the specific region S may be a middle region of the display panel 10.

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

In other examples, as shown in fig. 3B, the fingerprint recognition sensors 3 may be evenly distributed throughout the display panel 10 for full screen fingerprint recognition.

In some embodiments, as shown in fig. 1, the circuit structure layer 2 further comprises a plurality of acquisition circuits 22. Each acquisition circuit 22 is electrically connected to at least one fingerprint sensor 3. The acquisition circuit 22 includes at least one first thin film transistor 221.

As shown in fig. 1, "each collecting circuit 22 is electrically connected to at least one fingerprint sensor 3", and each collecting circuit 22 may be connected to only one fingerprint sensor 3. In some possible examples, each acquisition circuit 22 may also be connected to a plurality of fingerprint recognition sensors 3. The number of fingerprint recognition sensors 3 connected to the acquisition circuit 22 is not limited in this disclosure.

In some examples, as shown in fig. 1, the first thin film transistor 221 may be a top gate type thin film transistor. In other examples, the first thin film transistor 221 may also be a bottom gate type thin film transistor.

In some examples, as shown in fig. 4A and 4B, the first thin film transistor 221 may be a P-type thin film transistor. In other examples, the first thin film transistor 221 may also be an N-type thin film transistor.

In some examples, as shown in fig. 1, "the acquisition circuit 22 includes at least one thin film transistor 221" may be 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 include a plurality of thin film transistors 221 in the acquisition circuit 22. The number of the thin film transistors 221 is not limited in the present disclosure as long as signal acquisition of the fingerprint recognition sensor 3 can be achieved.

For example, as shown in fig. 4A and 4B, when the acquisition circuit 22 includes only one thin film transistor 221, the control terminal of the thin film transistor 211 may be connected to a gate signal line XL, and a signal transmitted through the gate signal line XL can control the thin film transistor 221 to turn on and off, so as to control whether the acquisition circuit 22 acquires the electrical signal generated by the fingerprint sensor 3. One of a source and a drain of the thin film transistor 221 is connected to the fingerprint recognition sensor 3, and the other is connected to the pickup signal line CL. Therefore, when the thin film transistor 221 is turned on, the electrical signal generated by the fingerprint sensor 3 can be transmitted to the fingerprint identification chip through the collecting signal line CL.

In some embodiments, as shown in fig. 5, the pixel circuit 21 may include at least one second thin film transistor 211, and the first thin film transistor 221 and the second thin film transistor 211 are disposed in the same layer.

Among them, the first thin film transistor 221 may exemplarily 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.

As shown in fig. 5, "the first thin film transistor 221 is disposed at the same layer as the second thin film transistor 211," and the first active layer pattern 222 and the second active layer pattern 212 may be disposed at the same layer, the first gate electrode 223 and the second gate electrode 213 may be fabricated at 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 may be disposed at the same layer.

Wherein "same layer" means: and forming a film layer for forming a specific pattern by using the same film forming process, and forming a layer structure by using the same mask plate through a one-time composition process. Depending on the specific pattern, the 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 the specific patterns may be at different heights or have different thicknesses.

For example, the first source electrode 224, the second source electrode 214, the first drain electrode 225, and the second drain electrode 215 may have 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 structures, the first source 224, the second source 214, the first drain 225 and the second drain 215 may each include a titanium metal layer, an aluminum metal layer and a titanium metal layer, which are stacked and sequentially separated from the substrate 1.

In some embodiments of the present disclosure, the first thin film transistor 221 and the second thin film transistor 211 are disposed on the same layer, that is, in the process of manufacturing the display panel 1, the second thin film transistor 211 and the first thin film transistor 221 can be simultaneously manufactured, so as to simplify the manufacturing process of the display panel 10, reduce the number of masks used, and reduce the cost.

In some embodiments, referring to fig. 1 and 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.

Wherein the first electrode 31 is disposed on a side of the photosensitive pattern 33 away from the substrate 1, 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 on 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 pickup circuit 22.

In some examples, as shown in fig. 5, 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, as shown in fig. 6, 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 sequentially distant from the substrate 1. When the first insulating layer 6 includes the passivation layer 63 and the planarization layer 62 sequentially distant from the substrate 1, the first via hole 61 penetrates both the passivation layer 63 and the planarization layer 62.

In some examples, multiple first electrodes 31 may be connected to the same bias voltage V_bias. Thus, the first electrodes 31 may be connected to each other and then connected to the same bias voltage source. Therefore, the number of bias voltage sources in the display device is reduced, and the cost is reduced.

Note that "the same layer" in the "second electrode 32 is provided in the same layer as the first source electrode 224 and the first drain electrode 225 of the first thin film transistor 221" means that: and forming a film layer for forming a specific pattern by using the same film forming process, and forming a layer structure by using the same mask plate through a one-time composition process. Depending on the specific pattern, the 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 the specific patterns may be at different heights or have different thicknesses.

Therefore, in the manufacturing process of the display panel 10, the same mask is used to manufacture the second electrode 32 and the first source 224 and the first drain 225 of the first thin film transistor 221, so that the manufacturing process of the display panel 10 is simplified, and the manufacturing cost of the display panel 10 is reduced.

In some embodiments, as shown in fig. 7, 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. The first light shielding portion 7 is provided therein with a second opening 71, and an orthogonal projection of the second opening 71 on the substrate 1 at least partially overlaps an orthogonal projection of the photosensitive pattern 33 on the substrate 1.

Thus, when other light rays (non-fingerprint reflected light rays) in the environment irradiate one side of the fingerprint identification sensor far away from the substrate, the first shading part 7 can block the light rays, and the condition that the non-fingerprint reflected light rays irradiate the fingerprint identification sensor to influence the identification result of the fingerprint identification sensor is avoided. When the light reflected by the fingerprint is irradiated to 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 shading portion 7, so as to be irradiated into the fingerprint recognition sensor 3, and the fingerprint recognition is realized.

In some embodiments, the material of the first light shielding portion 7 may be an insulating material. At this time, 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.

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 multilayer 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, which are sequentially distant from the substrate 1. When the first light-shielding portion 7 is a conductive material, the first light-shielding portion 7 does not contact the first electrode 31, and the first light-shielding portion 7 does not contact the photosensitive layer 33.

Exemplarily, referring to fig. 7, the first electrode 31 is located in the second opening 71 of the first light shielding portion 7, and the first electrode 31 has a gap with the boundary of the first light shielding portion 7 at the second opening 71. Thus, the first electrode 31 and the first light-shielding portion 7 are prevented from being electrically connected to each other, thereby preventing the fingerprint sensor 3 from being affected in recognition.

In some embodiments, as shown in fig. 8, 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. The first light shielding portion 7 is provided with a first notch 72, and the bias voltage signal line 8 is electrically connected to the first electrode 31 through the first notch 72.

As shown in fig. 8, 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 be electrically connected to a plurality of first electrodes 31 at the same time.

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

In this way, the bias voltage signal line 8 and the first electrode 31 are arranged on the same layer, so that the first electrode 31 and the bias voltage signal line can be manufactured by using one mask plate in the manufacturing process of the display panel 10, the manufacturing process of the display panel 10 is simplified, and the manufacturing cost of the display panel 10 is reduced.

In some embodiments, as shown in fig. 9A, a plurality of second through holes 64 are further disposed in the first insulating layer 6, each second through hole 64 surrounds one first through hole 61, and a gap is provided between each second through hole 64 and the first through hole 61 surrounded by the second through hole 64. The display panel 10 further includes a plurality of second light shielding portions 9, and each second light shielding portion 9 is located in one second through hole 64.

In this way, each second through hole 64 surrounds one first through hole 61, the photosensitive layer 33 is located in the first through hole 61, and the second light-shielding portion 9 is located in the second through hole 64, so that when the display panel 10 performs fingerprint identification, the second light-shielding portion 9 can shield the fingerprint identification sensor 3 from light irradiated to the photosensitive layer 33 from the peripheral side, thereby preventing light emitted by the light-emitting device and light reflected by other film layers of the display panel from being irradiated to the photosensitive layer, and further preventing the identification accuracy and sensitivity of the fingerprint identification sensor from being affected.

In some examples, the second light shielding portion 9 may be an insulating material.

In other examples, the second light shielding portion 9 may be a conductive material. Based on this, as shown in fig. 9A, 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.

In some embodiments, as shown in fig. 9A, the first light-shielding portion 7 and the second light-shielding portion 9 corresponding to the same fingerprint recognition sensor 3 may be of an integral structure. At this time, for example, as shown in fig. 9B, a second notch 641 communicating with the first notch 72 may be provided in the second through hole 64.

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

In some embodiments, as shown in fig. 10, along the axial direction Y of the first through hole 61, the openings at the two ends of the first through hole 61 are: a third opening 611 remote from the substrate 1 and a fourth opening 612 close to the substrate 1.

An orthogonal projection of the third opening 611 on the substrate 1 is located within an orthogonal projection of the fourth opening 612 on the substrate 1, and a gap is provided between a boundary of the orthogonal projection of the third opening 611 on the substrate 1 and a boundary of the orthogonal projection of the fourth opening 612 on the substrate 1.

In this way, the size of the third opening 611 far away from the substrate 1 is smaller than the size of the fourth opening 612 near the substrate 1, so that when the light is irradiated to the fingerprint identification sensor from the side of the fingerprint identification sensor 3 far away from the substrate 1, the fingerprint identification sensor 3 can only receive the light reflected by the fingerprint, and the influence of other light on the identification result of the fingerprint identification sensor 3 is avoided.

Meanwhile, when the first shading part 7 and the second shading part 9 are made of conductive materials, the first shading part 7 can be prevented from being in direct contact with the photosensitive layer 33 arranged in the first through hole 61, and the second shading part 9 is simultaneously connected with the first shading part 7 in contact with the photosensitive layer 33 and the second electrode 32 in contact with the photosensitive layer 33, so that the short circuit of the fingerprint identification sensor is avoided, and the use stability of the fingerprint identification sensor 3 is improved.

In some embodiments, the first electrode 31 may be configured as a cathode and the second electrode 32 may be configured as an anode. At this time, the fingerprint sensor 3 may be in a face-up configuration, and the fingerprint recognition circuit may be as shown in fig. 4A.

In other embodiments, the first electrode 31 may be configured as an anode and the second electrode 32 may be configured as a cathode. The fingerprint sensor 3 may be an inverted structure, and the fingerprint recognition circuit may be as shown in fig. 4B.

In some embodiments, as shown in fig. 11A and 11B, the display panel 10 further includes an encapsulation layer 91 disposed on a side of the light emitting device layer 5 away from the substrate 1.

The encapsulating layer 91 is used for encapsulating the plurality of light emitting devices 51 onto the substrate 1, and the encapsulating layer 91 is also used for preventing water vapor and oxygen from entering the light emitting devices 51, so that the light emitting devices 51 can emit light normally.

Wherein the fingerprint sensor 3 is located on a side of the encapsulation layer 91 remote from the substrate 1. The display panel 10 includes a first electrode layer 101, a photosensitive layer 102, and a second electrode layer 103, which are stacked, and the second electrode layer 103 is close to or distant from the substrate 1 with respect to the first electrode layer 101. The first electrodes 31 of the fingerprint sensors 3 are located on the first electrode layer 101 and connected to each other, the photosensitive patterns 33 of the fingerprint sensors 3 are located on the photosensitive layer 102 and connected to each other, and the second electrodes 32 of the fingerprint sensors 3 are located on the second electrode layer 103 and independently disposed.

Based on this, when utilizing display panel 10 to carry out fingerprint identification, fingerprint identification sensor 3 is nearer apart from the finger, and the light that reflects back display panel 10 by the finger can pass in less rete reaches sensitization pattern 33, and light energy loss is less, and the fingerprint information that obtains in the fingerprint identification sensor 3 is more, and the effect of fingerprint identification sensor 3 discernment is better, and the rate of accuracy is higher.

In some examples, as shown in fig. 11A, the second electrode layer 103 is located on a side of the first electrode layer 101 close to the substrate 1.

In other examples, as shown in fig. 11B, the second electrode layer 103 is located on a side of the first electrode layer 101 away from the substrate 1.

Wherein the first electrode 31 may be used to transmit a bias voltage. The separately arranged second electrode 32 may be used for transmitting the fingerprint identification signal generated by the fingerprint identification sensor 3.

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

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

When the second electrode layer 103 is located on the side of the first electrode layer 101 away from the substrate 1, for example, the first electrode 31 may be configured as a cathode, and the second electrode 32 may be configured as an anode. At this time, the fingerprint recognition sensor 3 may have an inverted structure.

When the second electrode layer 103 is located on the side of the first electrode layer 101 away from the substrate 1, for example, the first electrode 31 may be configured as an anode, and the second electrode 32 may be configured as a cathode. At this time, the fingerprint recognition sensor 3 may have a front structure.

It is to be noted 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 from the light emitting device 51 from being directly irradiated into the photosensitive pattern 33 through the second electrode 32, the material of the second electrode 32 may be metal, such as copper, aluminum, and the like.

Of course, in order to allow the light reflected by 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.

When the second electrode layer 103 is located on a side of the first electrode layer 101 away from the substrate 1, in order to prevent light emitted from 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 metal, such as copper, aluminum, and the like. In order that the light reflected by the fingerprint back to the display panel 10 can be transmitted through the second electrode 32 and sensed by the photosensitive pattern 33, the material of the second electrode 32 may be a transparent conductive material, such as indium tin oxide.

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

Here, as shown in fig. 12A and 12B, "an orthographic projection of each third through hole 104 on the substrate 1 at least partially overlaps with an orthographic projection of at least one first opening 41 on the substrate 1", may be that each third through hole 104 at least partially overlaps with an orthographic projection of one first opening 41 on the substrate 1.

Alternatively, "an orthographic projection of each third through hole 104 on the substrate 1 at least partially overlaps with an orthographic projection of at least one first opening 41 on the substrate 1", it is also possible that each third through hole 104 at least partially overlaps with an orthographic projection of a plurality of first openings 41 on the substrate 1.

"at least partially overlap", i.e. the orthographic projection of the third via 104 on the substrate 1 may partially overlap or may completely overlap the orthographic projection of the at least one first opening 41 on the substrate 1.

By such an arrangement, at least a portion of the light emitted from the light emitting device 51 can pass through the first electrode layer 101 and the photosensitive layer 102 through the third through hole 104, so that the loss of the light emitted from the light emitting device 51 in the first electrode layer 101 and the photosensitive layer 102 can be reduced, the brightness of the light emitted from the display panel 10 can be enhanced, and the display effect of the display panel 10 can be improved. When the light emitted from the light emitting device 51 irradiates the fingerprint and is reflected back to the display panel 10 by the fingerprint, the intensity of the reflected light is higher, which is further beneficial to improving the accuracy of the detection result of the fingerprint identification sensor 3.

When the orthographic projection of each third through hole 104 and one first opening 411 on the substrate 1 are completely overlapped, the mask for manufacturing the first electrode layer 101 and the photosensitive layer 102 and the mask for manufacturing the pixel defining layer 4 can be the same, so that the number of the masks used in the manufacturing process of the display panel 10 can be reduced, and the manufacturing cost of the display panel 10 can be reduced.

In some embodiments, as shown in fig. 13, the display panel 10 further includes a antireflection layer 105. The antireflection layer 105 is located on a side of the plurality of fingerprint recognition sensors 3 remote from the encapsulation layer 91. The antireflection layer 105 is provided with a plurality of fourth through holes 106 and a plurality of fifth through holes 107, an orthogonal projection of each fourth through hole 106 on the substrate 1 at least partially overlaps an orthogonal projection of at least one second electrode 32 on the substrate 1, and an orthogonal projection of each fifth through hole 107 on the substrate 1 at least partially overlaps an orthogonal projection of at least one first opening 41 on the substrate 1.

Illustratively, the material of the antireflective layer 105 may be molybdenum oxide.

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 at least partially overlap with the orthographic projections of a plurality of second electrodes 32 on the substrate 1.

For example, the orthographic projection of each fourth via 106 on the substrate 1 may partially overlap the orthographic projection of at least one second electrode 32 on the substrate 1, or the orthographic projection of the fourth via 106 on the substrate 1 may completely overlap the orthographic projection of at least one second electrode 32 on the substrate 1.

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, and may also at least partially overlap with the orthographic projection of a plurality of first openings 41 on the substrate 1.

For example, the orthographic projection of each fifth through hole 107 on the substrate 1 may partially overlap the orthographic projection of at least one first opening 41 on the substrate 1, or the orthographic projection of each fifth through hole 107 on the substrate 1 may completely overlap the orthographic projection of at least one first opening 41 on the substrate 1.

Illustratively, the orthographic projections of the fourth via 106 and the fifth via 107 on the substrate may be substantially circular or substantially rectangular.

Wherein "substantially" is meant to include the recited shape and shapes that are generally similar to the recited shape. For example, for "substantially circular", it may be circular, or it may be a shape that is generally similar to a circle, at least part of the boundary of which shape is allowed to be different from at least part of the boundary of a circle, i.e. at least part of the boundary of which shape is allowed to be non-curvilinear, e.g. at least part of the boundary of which shape may be serrated, etc.

By providing the anti-reflection layer 105, the light reflectivity of the display panel 10 can be reduced (for example, reduced to 4% to 5%), so as to improve the display effect of the display panel 10 and avoid the mutual interference between the reflected light of the display panel 10 and the display light of the display panel 10.

Through set up a plurality of fourth through holes 106 in subtracting anti-layer 105 for subtract anti-layer 105 can expose a plurality of fingerprint identification sensor 3, thereby makes the light that enters into display panel 10 after reflecting by the fingerprint, can enter into a plurality of fingerprint identification sensor 3 respectively through a plurality of fourth through holes 106, realizes fingerprint identification. Meanwhile, the light reflected by the non-fingerprint can be prevented from entering the fingerprint identification sensor 3, and the accuracy of the detection structure of the fingerprint identification sensor is improved.

Through set up a plurality of fifth through-holes 107 in subtracting anti-layer 105 for the light that light emitting device sent can directly pass through subtracting anti-layer through fifth through-hole 107, avoids the condition that light intensity weakens to take place after subtracting anti-layer 105, guarantees display panel 10's luminous efficacy.

In some possible examples, as shown in fig. 13, an orthogonal projection of the fourth via 106 on the substrate 1 is located within an orthogonal projection of the second electrode 32 on the substrate 1, and a gap is provided between a boundary of the orthogonal projection of the fourth via 106 on the substrate 1 and a boundary of the orthogonal projection of the second electrode 32 on the substrate 1.

Through setting up like this for subtract other light in the reflection stratum 105 can also further block the environment, avoid in non-fingerprint reflection's light shines to the fingerprint identification sensor, cause the influence to fingerprint identification sensor testing result.

In some embodiments, as shown in fig. 14, the fingerprint recognition sensor 3 is configured to be connected to the touch chip 20 such that the fingerprint recognition sensor 3 is multiplexed as a component for sensing a touch position.

For example, the display panel 10 may implement the functions of fingerprint recognition and touch recognition in a time-sharing manner through mode switching. For example, during a first time period, the fingerprint recognition sensor 3 is configured to perform fingerprint recognition, and during a second time period, the fingerprint recognition sensor 3 is configured to perform touch recognition.

In some embodiments, as shown in fig. 15A and 15B, the photosensitive pattern 33 includes an electron transport layer 331, an active layer 332, and a hole transport layer 333, which are stacked. 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.

As shown in fig. 16, molybdenum oxide (MoO)₃) The energy of the HOMO (Highest Occupied Molecular Orbital) level of (A) is-5.3 eV, and the energy of the LUMO (Lowest Unoccupied Molecular Orbital) level is-2.3 eV. With PEDOT used in the related art: compared with PSS (poly 3, 4-ethylenedioxythiophene/polystyrene sulfonate), the molybdenum oxide has a higher LUMO energy level, which is beneficial to improving an electron injection barrier, and the energy level difference between the HOMO energy level and the LUMO energy level is larger, so that the molybdenum oxide has stronger electron blocking capability while the hole transport capability is stronger. Thus, when the material of the hole transport layer 333 includes molybdenum oxide, the hole transport layer 333 can function as an electron blocking layer, which is advantageous in reducing the number of defectsThe dark current density of the fingerprint identification sensor reduces noise.

As shown in fig. 16, the energy of the HOMO level of aluminum-doped zinc oxide (AZO) is less than-7 eV and the energy of the LUMO level is-3.9 eV. Compared with PDINO adopted in the related technology, the aluminum-doped zinc oxide has lower LUMO energy level and stronger electron transport capability. And the lower HOMO energy level of the aluminum-doped zinc oxide is beneficial to improving the potential barrier of hole injection, and the larger energy level difference between the HOMO energy level and the LUMO energy level is beneficial to intensifying the depletion of holes in the aluminum-doped zinc oxide. Thus, when the material of the electron transport layer 331 includes aluminum-doped zinc oxide, the electron transport layer 331 can function as a hole blocking layer, thereby facilitating to reduce the dark current density of the fingerprint sensor 3 and reduce the noise.

Illustratively, the material of the active layer 332 may be a mixture of a donor and an acceptor in a common solvent. Among them, common solvents may include, for example, a 1, 2-dichlorobenzene solution.

In some examples, the donor may be: 3-hexyl-substituted polythiophenes (Poly (3-hexylthiophene), P3HT for short). The receptors may be: Phenyl-C61-butyric acid methyl ester (Phenyl-C61-butyl acid methyl ester, PCBM for short) or PC60 BM. The energy of the HOMO level of P3HT may be-5.1 eV, and the energy of the LUMO level may be-3.0 eV. The HOMO level of PCBM may have an energy of-5.9 eV, and the LUMO level may have an energy of-3.9 eV. The energy of the HOMO level of PC60BM may be-2.2 eV, and the energy of the LUMO level may be-1.8 eV.

In other examples, the donor may be Y6 and the acceptor may be PM 6. The energy of the HOMO level of Y6 may be-5.65 eV, and the energy of the LUMO level may be-4.05 eV. The energy of the HOMO level of PM6 may be-5.5 eV and the energy of the LUMO level may be-3.61 eV.

It should be noted that the donor material and the acceptor material in the present disclosure are not limited thereto.

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 may be 2 × 10^-7mA/cm²The reverse bias voltage may be-3V to-6V.

When the fingerprint identification sensor 3 is an inverted structure, the charge collection efficiency can be improved, and the external quantum efficiency can be improved.

As shown in fig. 17, some embodiments of the present disclosure further provide a display device 100 including the display panel 10 according to any of the above embodiments.

The display device 100 may be any component having a display function, such as a television, a digital camera, a mobile phone, a watch, a tablet computer, a notebook computer, and a navigator.

The beneficial effects that can be achieved by the display device 100 provided in some embodiments of the present disclosure are the same as those that can be achieved by the display panel 10 provided in the above technical solution, and are not described herein again.

The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present disclosure, and all the changes or substitutions should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A display panel, comprising:

a substrate;

the circuit structure layer is arranged on the substrate and comprises a plurality of pixel circuits;

a plurality of fingerprint recognition sensors including a first electrode, a second electrode, and a photosensitive pattern between the first electrode and the second electrode;

the pixel defining layer is arranged on one side of the circuit structure layer, which is far away from the substrate; a plurality of first openings are arranged in the pixel defining layer; an orthographic projection of the first plurality of openings on the substrate is staggered from an orthographic projection of the fingerprint identification sensors on the substrate;

the light-emitting device layer is arranged on one side, far away from the substrate, of the circuit structure layer; the light emitting device layer includes a plurality of light emitting devices, each of which is disposed corresponding to one of the first openings and electrically connected to one of the pixel circuits.

2. The display panel of claim 1, wherein the circuit structure layer further comprises:

the fingerprint identification device comprises a plurality of acquisition circuits, a fingerprint identification sensor and a control circuit, wherein each acquisition circuit is electrically connected with at least one fingerprint identification 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 comprises:

a first insulating layer between the circuit structure layer and the pixel defining layer; a plurality of first through holes are formed in the first insulating layer, and photosensitive patterns of the fingerprint identification sensor are located in the first through holes;

wherein the first electrode is arranged at one side of the photosensitive pattern far away from the substrate, and the first electrode is configured to transmit bias voltage;

the second electrode is arranged on one side of the photosensitive pattern close to the substrate and is arranged on the same layer as the first source electrode and the first drain electrode of the first thin film transistor; the second electrode is electrically connected with a first source electrode or a first drain electrode 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 comprises:

the first shading part is positioned on one side, far away from the circuit structure layer, of the first insulating layer; a second opening is arranged in the first shading part, and the orthographic projection of the second opening on the substrate is at least partially overlapped with the 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 the boundary of the first shading portion at the second opening.

5. The display panel according to claim 4, characterized in that the display panel further comprises:

a plurality of bias voltage signal lines disposed in the same layer as the first electrodes; the first shading part is provided with a first notch, and the bias voltage signal wire penetrates through the first notch to be electrically connected with the first electrode.

6. The display panel according to claim 4, wherein a plurality of second through holes are further disposed in the first insulating layer, each second through hole surrounds one first through hole, and a gap is provided between the second through hole and the first through hole around the second through hole;

the display panel further includes:

and each second shading part is positioned in one second through hole.

7. The display panel according to claim 6,

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, wherein openings at both ends of the first through hole in an axial direction of the first through hole are: a third opening distal from the substrate and a fourth opening proximal 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 a gap is arranged 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.

9. The display panel according to any one of claims 2 to 8, wherein the pixel circuit comprises at least one second thin film transistor, and the first thin film transistor and the second thin film transistor are disposed in the same layer.

10. The display panel according to claim 1, characterized in that the display panel further comprises:

the packaging layer is arranged on one side, far away from the substrate, of the light-emitting device layer;

wherein the plurality of fingerprint identification sensors are positioned on one side of the packaging layer away from the substrate;

the display panel comprises a first electrode layer, a photosensitive layer and a second electrode layer which are stacked, wherein the second electrode layer is close to or far away from the substrate relative to the first electrode layer; the first electrodes of the fingerprint identification sensors are located on the first electrode layer and are connected with each other, the photosensitive patterns of the fingerprint identification sensors are located on the photosensitive layer and are connected with each other, and the second electrodes of the fingerprint identification sensors are located on the second electrode layer and are arranged independently.

11. The display panel according to claim 10, wherein 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 by further comprising:

the anti-reflection layer is positioned on one side, far away from the packaging layer, of the fingerprint identification sensors; the antireflection layer is provided with a plurality of fourth through holes and a plurality of fifth through holes, an orthographic projection of each fourth through hole on the substrate at least partially overlaps with an orthographic projection of at least one second electrode 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 first opening on the substrate.

13. The display panel according to any one of claims 10 to 12, wherein the fingerprint sensor is configured to be connected to a touch chip so that the fingerprint sensor is multiplexed as a component for sensing a touch position.

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

15. A display device, comprising:

the display panel according to any one of claims 1 to 14.