Display panel and display device

Abstract

The application provides a display panel and a display device, and relates to the technical field of display. The display panel comprises a plurality of sub-pixel units, and at least part of the sub-pixel units comprises a light-emitting device and a light-sensing device. The light-emitting device comprises a first electrode, a light-emitting layer and a second electrode which are stacked. The light-sensing device is at least partially overlapped with the light-emitting layer in the orthographic projection of the display panel on the light-emitting surface. In this way, the integration of the display panel is improved without affecting the size of the light-sensing area of the light-sensing device.

Description

Technical Field

[0001] This application relates to the field of display technology, and more specifically to a display panel and a display device having the display panel. Background Technology

[0002] With the development of display technology, biometric recognition technology, especially optical image acquisition technology, is widely used in display products. However, with the development of terminal products, people have increasingly higher requirements for full-screen and thinner display products, which places higher demands on optical image acquisition modules, requiring them to have a large recognition area while having a small assembly space. Therefore, there is an urgent need to provide a new solution that improves the integration of optical image acquisition modules with display products without affecting the recognition area of ​​the optical image acquisition module. Summary of the Invention

[0003] A first aspect of this application provides a display panel comprising a plurality of sub-pixel units, and at least some of the sub-pixel units comprising a light-emitting device and a photosensitive device. The light-emitting device comprises a first electrode stacked thereon, and a light-emitting functional layer comprising at least a light-emitting layer and a second electrode. The orthographic projection of the photosensitive device onto the light-emitting surface of the display panel at least partially coincides with the orthographic projection of the light-emitting layer onto the light-emitting surface of the display panel.

[0004] In the above scheme, by setting the relative positions between the light-emitting device and the photosensitive device, the orthographic projections of the light-emitting layers of the photosensitive device and the light-emitting device on the surface of the display panel overlap, thereby improving the integration level of the photosensitive device in the display panel.

[0005] In conjunction with the first aspect, in some embodiments, the photosensitive device includes a photosensitive layer whose orthographic projection on the light-emitting surface of the display panel does not exceed the orthographic projection of the light-emitting layer on the light-emitting surface of the display panel.

[0006] In the above solution, the photosensitive layer does not require additional space in the display panel used for pixel arrangement, allowing for greater integration of the photosensitive device within the display panel. Furthermore, the saved space can accommodate more light-emitting devices, thereby improving display resolution.

[0007] In conjunction with the first aspect, in some embodiments, the display panel further includes a substrate and a defining layer. The defining layer is located on the substrate and defines an opening. Furthermore, in a sub-pixel unit provided with a photosensitive device and a light-emitting device, the photosensitive layer and the light-emitting layer are located within the same opening.

[0008] In the above scheme, placing the photosensitive device and the light-emitting device within the opening defined by the same defining layer can further improve the integration level of the display panel.

[0009] In conjunction with the first aspect, in some embodiments, the photosensitive device is located on the side of the light-emitting device facing away from the substrate. The photosensitive device further includes a third electrode, and the photosensitive layer is located on the side of the second electrode facing away from the substrate, and the third electrode is located on the side of the photosensitive layer facing away from the substrate. Further, the first electrode is the anode of the light-emitting device, the second electrode is the cathode, and the third electrode is the anode of the photosensitive device. Further, the second electrode and the third electrode are both transparent electrodes.

[0010] In conjunction with the first aspect, in some embodiments, the display panel further includes an insulating layer disposed along the outer periphery of the photosensitive layer and located between the anode and cathode of the photosensitive device.

[0011] In the above solution, the insulating layer can reduce the risk of overlap between different electrodes in sub-pixels containing photosensitive and light-emitting devices, thereby improving the quality of the display panel.

[0012] In conjunction with the first aspect, in some embodiments, the photosensitive device is located on the side of the light-emitting device facing the substrate. The photosensitive device also includes a third electrode, with a photosensitive layer located on the side of the first electrode facing the substrate, and the third electrode located on the side of the photosensitive layer facing the substrate. Further, the first electrode is a cathode, the second electrode is the anode of the light-emitting device, and the third electrode is the anode of the photosensitive device. Further, the first electrode and the second electrode are both transparent electrodes. In the above scheme, the design scheme of setting the transparency of the second and third electrodes based on the relative positions of the photosensitive device and the light-emitting device can improve both the display effect of the display panel and the recognition accuracy of the photosensitive device.

[0013] In conjunction with the first aspect, in some embodiments, the display panel further includes an insulating layer disposed along the outer periphery of the light-emitting layer and located between the anode and cathode of the light-emitting device.

[0014] In the above solution, the insulating layer can reduce the risk of anode and cathode bridging in the light-emitting device, thereby improving the quality of the display panel.

[0015] In conjunction with the first aspect, in some embodiments, the sub-pixel unit includes a first sub-pixel unit, a second sub-pixel unit, and a third sub-pixel unit, wherein the wavelength of light emitted from the first sub-pixel unit is greater than the wavelength of light emitted from the second sub-pixel unit, the wavelength of light emitted from the second sub-pixel unit is greater than the wavelength of light emitted from the third sub-pixel unit, and at least one first sub-pixel unit includes a photosensitive device, and / or at least one third sub-pixel unit includes a photosensitive device.

[0016] In the above scheme, the second sub-pixel unit emits the brightest light, and its corresponding opening is not equipped with a photosensitive device, but is used as an illumination source for fingerprint recognition, thereby improving the accuracy of the photosensitive device.

[0017] In conjunction with the first aspect, in some embodiments, the display panel includes a display area and a non-display area. The display area includes a first area and a second area, and a first sub-pixel unit or a third sub-pixel unit located in the second area includes a photosensitive device.

[0018] A second aspect of this application provides a display device that includes the display panel described in any of the embodiments of the first aspect. Attached Figure Description

[0019] Figure 1 This is a plan view of a display panel according to an embodiment of this application.

[0020] Figure 2 This is a cross-sectional schematic diagram of a display panel according to an embodiment of this application.

[0021] Figure 3 This is a cross-sectional view of the display panel in one embodiment of this application.

[0022] Figure 4 This is a cross-sectional view of the display panel in another embodiment of this application.

[0023] Figure 5 This is a cross-sectional schematic diagram of the display panel in another embodiment of this application.

[0024] Figure 6 This is a cross-sectional schematic diagram of the display panel in another embodiment of this application.

[0025] Figure 7 This is a cross-sectional schematic diagram of the display panel in another embodiment of this application.

[0026] Figure 8 This is a cross-sectional view of the display panel in one embodiment of this application.

[0027] Figure 9 This is a cross-sectional view of the display panel in another embodiment of this application.

[0028] Figure 10 This is a plan view of the display panel in another embodiment of this application. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] This application provides a display panel comprising a plurality of sub-pixel units, with at least some sub-pixel units including a light-emitting device and a photosensitive device. The light-emitting device includes a first electrode stacked thereon, a light-emitting functional layer including at least a light-emitting layer, and a second electrode. The orthographic projection of the photosensitive device onto the light-emitting surface of the display panel, i.e., along the thickness direction of the display panel, at least partially overlaps with the orthographic projection of the light-emitting layer onto the light-emitting surface of the display panel. Thus, the orthographic projections of the light-emitting layer of the light-emitting device and the photosensitive device relative to the same reference interface overlap in the horizontal direction, improving the integration level of the photosensitive device in the display panel without affecting the size of the photosensitive area.

[0031] For example, such as Figure 1 and Figure 2 As shown, the display panel includes a substrate 100 and a plurality of sub-pixel units arrayed on the substrate 100. The plurality of sub-pixel units are divided into three categories: sub-pixel R units emitting red light, sub-pixel G units emitting green light, and sub-pixel B units emitting blue light. Each sub-pixel unit is provided with a light-emitting device 200 corresponding to the emitted light color. Each light-emitting device 200 includes a first electrode 201 disposed on the substrate 100, a light-emitting functional layer 202 disposed on the side of the first electrode 201 facing away from the substrate 100, and a second electrode 203 disposed on the side of the light-emitting functional layer 202 facing away from the substrate 100. Furthermore, a photosensitive device 300 is also disposed in the sub-pixel R unit. Specifically, the sub-pixel R unit includes a light-emitting device R and a photosensitive device 300, the sub-pixel G unit includes only a light-emitting device G, the sub-pixel B unit includes only a light-emitting device B, and in the sub-pixel R unit, the orthographic projection of the photosensitive device 300 on the substrate 100 overlaps at least partially with the orthographic projection of the light-emitting layer of the light-emitting device R on the substrate 100.

[0032] This embodiment also designs a relative arrangement scheme between the photosensitive device and its corresponding light-emitting device. For example, in some embodiments, the photosensitive device includes a photosensitive layer, which is vertically stacked on one side of the light-emitting layer, and the orthographic projection of the photosensitive layer onto the light-emitting surface of the display panel does not exceed the orthographic projection of the light-emitting layer onto the light-emitting surface of the display panel. Thus, relative to the same reference surface, the orthographic projection of the photosensitive layer is less than or equal to the orthographic projection of the light-emitting layer, which can improve the integration degree of the photosensitive device in the display panel while ensuring the size of the sensing area of ​​the photosensitive device to a greater extent. Furthermore, the arrangement of the photosensitive layer does not occupy the layout area of ​​the display panel used for setting sub-pixel units; that is, the layout area saved by the photosensitive device can be used to set the light-emitting device, which can improve the resolution of the display panel.

[0033] For example, such as Figure 3 and Figure 4As shown, in the sub-pixel R unit equipped with photosensitive device 300, a cross-sectional view perpendicular to the substrate 100 reveals that the photosensitive layer 301 of photosensitive device 300 and the light-emitting layer of light-emitting device R in sub-pixel R unit are arranged perpendicularly to each other, minimizing the impact of optical phenomena such as reflection, diffraction, and refraction between the two layers on the light emission effect of light-emitting device R. Furthermore, as... Figure 5 As shown, in a sub-pixel R unit equipped with a photosensitive device 300, the orthographic projection of the light-emitting layer 202 of the light-emitting device R onto the light-emitting surface of the display panel covers the orthographic projection of the photosensitive layer 301 of the photosensitive device 300 onto the light-emitting surface of the display panel.

[0034] There are various schemes for overlapping light-emitting devices and photosensitive devices in the vertical direction. In some embodiments, the display panel also includes a substrate and a defining layer. The defining layer is located on the substrate and defines an opening. In a sub-pixel unit where a photosensitive device and a light-emitting device are provided, the photosensitive layer and the light-emitting layer are located within the same opening. This design scheme, which places the photosensitive device and the light-emitting device within the same opening defined by the defining layer, reduces the design complexity of the photosensitive device, thereby simplifying the processing of the display panel and saving production costs.

[0035] For example, such as Figure 3 and Figure 4 As shown, the display panel includes a substrate 100, a thin-film transistor layer 400 disposed on the substrate 100, and a defining layer 500 located on the side of the thin-film transistor layer 400 facing away from the substrate 100, and the defining layer 500 defines an opening. In a sub-pixel R unit provided with a photosensitive device 300, the corresponding opening is provided not only with a light-emitting functional layer 202 corresponding to the light-emitting device R, but also with a photosensitive layer 301 of the photosensitive device 300 corresponding to the sub-pixel R unit. The light-emitting functional layer 202 of the light-emitting device R and the photosensitive layer 301 are arranged perpendicularly to each other, and the orthographic projection of the photosensitive layer 301 on the substrate 100 falls within the orthographic projection of the light-emitting functional layer 202 of the light-emitting device R on the substrate 100.

[0036] It should be understood that the light-emitting functional layer in the above example refers to the light-emitting layer located within the opening defined by the defining layer and the common film layer located within the corresponding opening, such as the hole injection layer, hole transport layer, electron injection layer, and electron transport layer. These common film layers cover the opening and its perimeter. The specific structure of the light-emitting functional layer is not limited here and can be designed according to the functional requirements of the display panel, and will not be elaborated further.

[0037] In practical applications, the photosensitive element can be positioned relative to the light-emitting element at different film layer locations. In some embodiments, the photosensitive element is located on the side of the light-emitting element away from the substrate or on the side of the light-emitting element facing the substrate. Thus, by selecting the relative positional relationship between the photosensitive element and the light-emitting element according to the actual requirements of the display panel and the manufacturing process, the applicability of this solution is improved.

[0038] For example, such as Figure 5 As shown, the display panel uses a top-emitting method, and in the sub-pixel R unit where a photosensitive device 300 is provided, the photosensitive device 300 is located on the side of the light-emitting device R that faces away from the substrate 100. Figure 6 As shown, the display panel uses a bottom-emitting method. In the sub-pixel R unit with a photosensitive device 300, the photosensitive device 300 is located on the substrate 100, and the light-emitting device R is located on the side of the photosensitive device 300 facing away from the substrate 100. When using the fingerprint recognition function, touching an adjacent sub-pixel unit around the sub-pixel R unit, such as the sub-pixel G unit, causes the green light emitted from the sub-pixel G unit to be directly reflected by the finger. The reflected light reaches the photosensitive device 300 in the sub-pixel R unit, thereby realizing the fingerprint recognition function.

[0039] Based on the different light-emitting methods required by the display panel, photosensitive devices can be positioned at different film layers relative to the light-emitting devices on the substrate. Furthermore, to further improve the integration of the display panel, a time-division multiplexing control method is used, combined with the light-emitting methods, to ensure the normal operation of both the photosensitive and light-emitting devices. Specifically, in display mode, the photosensitive device is off and does not output current, while all light-emitting devices emit light normally. In fingerprint recognition mode, only the light-emitting devices in sub-pixel units adjacent to the sub-pixel unit with the photosensitive device, and which do not have photosensitive devices themselves, emit light, serving as the illumination source for fingerprint recognition. Other light-emitting devices are off, and the photosensitive device is in an on / off state. This achieves normal operation of both the display and fingerprint recognition functions of the display panel when the photosensitive device and its corresponding light-emitting device share electrodes within the same pixel unit. The following section provides a detailed explanation of the case where the photosensitive device and its corresponding light-emitting device share electrodes.

[0040] In some embodiments, where the photosensitive device is located on the side of the light-emitting device facing away from the substrate, the photosensitive device further includes a third electrode. The photosensitive layer is located on the side of the second electrode facing away from the substrate, and the third electrode is located on the side of the photosensitive layer facing away from the substrate. In at least one embodiment, the first electrode is the anode of the light-emitting device, the second electrode is the cathode, and the third electrode is the anode of the photosensitive device. The photosensitive device and the light-emitting device share the second electrode, and the conduction of the first electrode and the third electrode is respectively driven to realize the operation of the light-emitting device and the photosensitive device at different times. This reduces the impact on the display panel without affecting the graphic recognition function.

[0041] For example, such as Figure 3 As shown, in a sub-pixel R unit equipped with a photosensitive device 300, it includes a light-emitting device R disposed on a substrate 100 and a photosensitive device 300 disposed on the side of the light-emitting device R facing away from the substrate 100. The light-emitting device R includes a first electrode 201, a light-emitting functional layer 202, and a second electrode 203 stacked in the direction facing away from the substrate 100, wherein the first electrode 201 is the anode of the light-emitting device R and the second electrode 203 is the cathode. The photosensitive device 300 includes a photosensitive layer 301 and a third electrode 302 stacked on the side of the cathode facing away from the substrate, wherein the third electrode 302 is the anode of the photosensitive device 300, and the cathode is a common electrode of the light-emitting device R and the photosensitive device 300.

[0042] In some embodiments, the display panel further includes an insulating layer disposed along the outer periphery of the photosensitive layer and located between the anode and cathode of the photosensitive device when the photosensitive device is located on the side of the light-emitting device facing away from the substrate. This insulating layer reduces the risk of overlap between different electrodes in the sub-pixels where the photosensitive and light-emitting devices are located, thereby improving the quality of the display panel.

[0043] For example, such as Figure 7 and Figure 8 As shown, in the three sub-pixel units included in the display panel, sub-pixel R and sub-pixel B are respectively provided with photosensitive devices 300 and corresponding light-emitting devices R and B, while sub-pixel G is provided with only light-emitting device G. During the fingerprint recognition stage, the green light emitted by the light-emitting device G serves as illumination light for fingerprint recognition. In the light-emitting unit provided with photosensitive device 300, photosensitive device 300 is located on the side of light-emitting device 200 away from substrate 100. That is, the sub-pixel unit provided with photosensitive device 300 includes the anode 201 of light-emitting devices 200b / 200c, the light-emitting functional layer 202, the cathode 203, the photosensitive layer 301, and the anode 302 of photosensitive device 300, which are stacked sequentially. The photosensitive layer 301 and the light-emitting functional layer 202 are located within the same opening defined by the defining layer 500. At this time, there is a risk of overlap between the anode 302 and cathode 203 of the photosensitive device 300 on the periphery of the photosensitive layer 301. Therefore, an insulating layer 600 is provided on the side of the cathode 203 away from the substrate 100. The insulating layer 600 is distributed along the periphery of the photosensitive layer 301 and located between the anode 302 and cathode 203 of the photosensitive device 300, which can effectively prevent them from overlapping and improve the quality of the display panel. The sub-pixel G unit located between the sub-pixel R unit and the sub-pixel B unit includes the anode 201, the light-emitting functional layer 202, and the cathode 203 of the light-emitting device 200b stacked in sequence. The insulating layer 600 extends from the periphery of the opening of the sub-pixel R unit to the opening and periphery of the sub-pixel G unit, and finally extends to the periphery of the opening of the sub-pixel B unit.

[0044] In some embodiments, where the photosensitive device is located on the side of the light-emitting device facing the substrate, the photosensitive device further includes a third electrode, with the photosensitive layer located on the side of the first electrode facing the substrate and the third electrode located on the side of the photosensitive layer facing the substrate. In at least one embodiment, the first electrode is a cathode, the second electrode is the anode of the light-emitting device, and the third electrode is the anode of the photosensitive device. The photosensitive device and the light-emitting device share the first electrode, while the second and third electrodes are separate, enabling time-division control of the light-emitting device and the photosensitive device. This reduces the impact on the display panel's display without affecting the graphic recognition function.

[0045] For example, such as Figure 4 As shown, in a sub-pixel R unit equipped with a photosensitive device 300, it includes a photosensitive device 300 disposed on a substrate 100 and a light-emitting device R disposed on the side of the photosensitive device 300 facing away from the substrate 100. The photosensitive device 300 includes a third electrode 302 disposed on the substrate 100 and a photosensitive layer 301 disposed on the side of the third electrode 302 facing away from the substrate 100, and the third electrode 302 is the anode of the photosensitive device 300. The light-emitting device R includes a first electrode 201 disposed on the side of the photosensitive layer 301 facing away from the substrate 100, a light-emitting functional layer 202 located on the side of the first electrode 201 facing away from the substrate 100, and a second electrode 203 located on the side of the light-emitting functional layer 202 facing away from the substrate 100, and the first electrode 201 is a cathode shared by the light-emitting device R and the photosensitive device 300, and the second electrode 203 is the anode of the light-emitting device R.

[0046] In the above exemplary scheme, the photosensitive device and the light-emitting device R in the same sub-pixel R unit share the same cathode. By controlling the conduction of the anodes corresponding to the two devices respectively, the above time-division multiplexing scheme is used to realize the operation of different devices in different modes.

[0047] It should be understood that, Figure 3 and Figure 4 This diagram only illustrates one driving connection method for the electrodes of a light-emitting device and a photosensitive device, allowing the anodes of the light-emitting device and the photosensitive device to be turned on by different driving signals. This achieves the normal operation of the display function and fingerprint recognition function of the display panel through time-division multiplexing. In actual production, the driving connection method of the anodes of the light-emitting device and the photosensitive device can be designed according to the functional requirements of the display panel and the specific manufacturing process, which will not be elaborated here.

[0048] In conjunction with the first aspect, in some embodiments, where the photosensitive device is located on the side of the light-emitting device facing the substrate, the display panel further includes an insulating layer disposed along the outer periphery of the light-emitting layer and located between the anode and cathode of the light-emitting device.

[0049] For example, such as Figure 7 and Figure 9 As shown, in sub-pixels R and B, which are equipped with photosensitive devices 300, there are respectively anode 302, photosensitive layer 301, cathode 203, light-emitting functional layer 202, and anode 201 of light-emitting device 300 stacked sequentially. At this time, the anode 201 of light-emitting device extends to the periphery of the opening defined by the defining layer 500. The light-emitting device G includes cathode 203, light-emitting functional layer 202, and anode 201 of light-emitting device G stacked sequentially. The cathode 203 extends from sub-pixel R to sub-pixel G as a common electrode. There is a risk of overlap between the anode 201 of the light-emitting device corresponding to the light-emitting device R and the light-emitting device G. Therefore, an insulating layer 600 is provided between the anode 201 and the cathode 203 of the light-emitting device. The insulating layer 600 is provided along the outer periphery of the light-emitting layer included in the light-emitting functional layer 202, located around the opening of the defining layer 500. The insulating layer is actually located between the light-emitting functional layer 202 (the common layer other than the light-emitting layer) and the anode 201 or cathode 203 of the light-emitting device, which can effectively prevent the anode 201 and the cathode 203 of the light-emitting device from overlapping.

[0050] Considering the arrangement of the photosensitive device and the light-emitting device relative to the substrate in the same sub-pixel unit, as well as the light emission modes at different positions of the display panel, in order to improve the light emission effect of the display panel and the accuracy of fingerprint recognition, the electrodes of the light-emitting device and the electrodes of the photosensitive device were designed respectively. The specific solutions are as follows.

[0051] When the photosensitive device 300 is located on the side of the light-emitting device 200 away from the substrate, such as Figure 3 As shown, in some embodiments, the first electrode 201 and the light-emitting device are non-transparent or transparent structures, the second electrode 203 and the third electrode 302 are transparent electrodes, and the photosensitive device is a transparent structure. That is, the anode of the light-emitting device is a non-transparent or transparent electrode, and the cathode and the anode of the photosensitive device are transparent electrodes. When the light emission direction is from the substrate 100 to the light-emitting device 200, on the light-emitting side of the display panel, on the side of the substrate 100 facing the light-emitting functional layer 202, by touching the fingerprint recognition area, the light emitted from the light-emitting device 200 in the sub-pixel unit where the photosensitive device 300 is not located is reflected by the finger onto the photosensitive device 300, thereby realizing the photosensitive function. When realizing the display function, the photosensitive device 300 is controlled to not work, while the light-emitting device 200 corresponding to each sub-pixel unit is controlled to work. Therefore, based on the relative position of the photosensitive device 300 and the light-emitting device 200, the transparency of their electrodes is set so that the photosensitive function and the light emission function do not interfere with each other, while also reducing the impact of the photosensitive device 300 on the luminous efficiency of the sub-pixel where it is located.

[0052] When the photosensitive device 300 is located on the side of the light-emitting device 200 facing the substrate 100, such as Figure 4 As shown, in some embodiments, the first electrode 201 is a non-transparent electrode or a transparent electrode, the photosensitive device is a transparent or non-transparent structure, the second electrode 203 and the third electrode 302 are transparent electrodes, and the light-emitting device is a transparent structure. That is, the anode corresponding to the light-emitting device 200 is a transparent electrode or a non-transparent electrode, the cathode corresponding to the light-emitting device 200 and the anode corresponding to the photosensitive device 300 are transparent electrodes. The light-emitting device 200, the photosensitive device 300 and their corresponding electrodes are all transparent. The light-emitting surface of the display panel is the side of the substrate away from the light-emitting device 200, that is, the light-emitting direction is from the light-emitting device 200 to the substrate 100. When a sub-pixel without a photosensitive device 300 is touched from below, the light emitted by the sub-pixel is reflected onto the photosensitive layer 301 of the photosensitive device 300. In the display function, the photosensitive device 300 does not work, so that the photosensitive function and the display function do not affect each other.

[0053] In at least one embodiment, the anode of the light-emitting device can be formed by stacking indium tin oxide and silver when used as a non-transparent electrode, and by indium tin oxide when used as a transparent electrode. The anode of the photosensitive device can be formed by using indium tin oxide to form a transparent electrode. The cathode is formed by a magnesium-silver alloy, and the thickness of the cathode can be less than 13 nm, and the proportion of silver must be controlled so as not to affect the transparent display.

[0054] It should be understood that when the photosensitive device is located at a point where the light-emitting device faces the substrate, considering it is a bottom-emitting scheme, the density of the corresponding driving circuit will be set lower to reduce the impact of light loss during the process of light penetrating the substrate to reach the fingerprint and being reflected back. Furthermore, both the light-emitting device and the photosensitive device, located within the same opening, are formed using an evaporation process with an FMM mask. The insulating layer can be a low-damage inorganic film layer formed by plasma chemical vapor deposition. The areas of the photosensitive device and the light-emitting device can be formed using an etching process, such as laser etching.

[0055] In some embodiments, the sub-pixel unit includes a first sub-pixel unit, a second sub-pixel unit, and a third sub-pixel unit. The wavelength of light emitted from the first sub-pixel unit is greater than the wavelength of light emitted from the second sub-pixel unit, the wavelength of light emitted from the second sub-pixel unit is greater than the wavelength of light emitted from the third sub-pixel unit, and at least one first sub-pixel unit includes a light-emitting device and a photosensitive device corresponding to the wavelength of light emitted from the first sub-pixel unit, and / or at least one third sub-pixel unit includes a light-emitting device and a photosensitive device corresponding to the wavelength of light emitted from the third sub-pixel unit. The second sub-pixel unit emits the brightest light, which serves as at least one illumination source for fingerprint recognition, improving the accuracy of the photosensitive device.

[0056] For example, such as Figure 7 As shown, the display panel includes sub-pixel R units, sub-pixel G units, and sub-pixel B units. Each sub-pixel unit is equipped with a light-emitting device 200 that emits light of a different color. The wavelength of the green light emitted by the light-emitting device G is shorter than the wavelength of the red light emitted by the light-emitting device R, and the wavelength of the green light emitted by the light-emitting device G is longer than the wavelength of the blue light emitted by the light-emitting device B. Based on this sub-pixel arrangement, a first photosensitive device 300a is set in the sub-pixel R unit, and a second photosensitive device 300b is set in each of the sub-pixel B units. Since humans are more sensitive to green light, it can be used as an illumination source in the fingerprint recognition function, improving the accuracy of fingerprint recognition.

[0057] It should be understood that the positional relationship between the photosensitive device and its corresponding light-emitting device and the film layer of the substrate in different sub-pixel units can be the same or different. Furthermore, the type, arrangement, number, and type of sub-pixel units with photosensitive devices in the display panel are not limited to the scheme shown in the example; the display panel can also adopt an RGBG pixel arrangement. In addition, the photosensitive device can be located in any one or any two of the sub-pixel R, G, and B units. These can be selected according to the functional requirements of the display panel and the actual manufacturing process, and will not be elaborated upon here.

[0058] In other embodiments, exemplarily, such as Figure 10 As shown, the display panel includes a display area AA and a non-display area NA surrounding the display area AA. The display area AA is divided into a first area AA1 and a second area AA2, with the first area AA1 being the main display area and the second area AA2 being the fingerprint recognition area. Within the fingerprint recognition area, the first sub-pixel unit, i.e., the R unit, contains not only a light-emitting device R but also a photosensitive device 300a. Alternatively, within the fingerprint recognition area, the third sub-pixel unit, i.e., the B unit, contains not only a light-emitting device B but also a photosensitive device 300b. Thus, according to the functional requirements of the display panel, a fingerprint recognition area is defined within the display, and photosensitive devices are arranged at intervals within this fingerprint recognition area. This satisfies the fingerprint recognition function of the display panel while simplifying its structure.

[0059] It should be understood that the above is only an example of the case where the display area includes a first area and a second area. It does not limit the shape or relative size relationship of the first and second areas, nor does it limit the type, arrangement, or number of sub-pixels in the second area. These can be designed according to the needs of the display panel, and will not be elaborated here.

[0060] This application also provides a display device, which includes a display panel according to any one of the above embodiments.

[0061] In at least one embodiment, the display device further includes a touch sensor, a touch chip, and a flexible circuit board for implementing touch control. To achieve a thinner and lighter touch display device, the touch sensor is disposed within the display device's encapsulation layer, the touch chip is disposed on the flexible circuit board, and signals are transmitted to the touch sensor via touch signal lines.

[0062] In at least one embodiment, the display device can be any product or component with display and touch functions, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator. Implementation of this display device can refer to the embodiments of the array substrate described above; details will not be repeated.

[0063] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A display panel, characterized in that, It includes multiple sub-pixel units, and at least some of the sub-pixel units include: A light-emitting device includes a stacked first electrode, a light-emitting functional layer, and a second electrode, wherein the light-emitting functional layer includes at least a light-emitting layer. A photosensitive device, wherein the orthographic projection of the photosensitive device on the light-emitting surface of the display panel at least partially overlaps with the orthographic projection of the light-emitting layer on the light-emitting surface of the display panel, the photosensitive device comprising a photosensitive layer; Substrate; and A defining layer is located on the substrate and defines an opening; In the sub-pixel unit provided with the photosensitive device and the light-emitting device, the photosensitive layer and the light-emitting layer are located in the same opening, and a portion of the photosensitive layer extends to the side of the defining layer away from the substrate; The photosensitive device is located on the side of the light-emitting device facing away from the substrate. The photosensitive device further includes a third electrode. The photosensitive layer is located on the side of the second electrode facing away from the substrate, and the third electrode is located on the side of the photosensitive layer facing away from the substrate. The second electrode and the third electrode are both transparent electrodes. The photosensitive device is located on the side of the light-emitting device facing the substrate. The photosensitive device also includes a third electrode. The photosensitive layer is located on the side of the first electrode facing the substrate, and the third electrode is located on the side of the photosensitive layer facing the substrate. The first electrode and the second electrode are both transparent electrodes.

2. The display panel according to claim 1, characterized in that, The orthographic projection of the photosensitive layer on the light-emitting surface of the display panel does not exceed the orthographic projection of the light-emitting layer on the light-emitting surface of the display panel.

3. The display panel according to claim 1, characterized in that, The photosensitive device is located on the side of the light-emitting device away from the substrate. The photosensitive device also includes a third electrode. The photosensitive layer is located on the side of the second electrode away from the substrate, and the third electrode is located on the side of the photosensitive layer away from the substrate. The first electrode is the anode of the light-emitting device, the second electrode is the cathode, and the third electrode is the anode of the photosensitive device.

4. The display panel according to claim 3, characterized in that, It also includes an insulating layer disposed along the outer periphery of the photosensitive layer and located between the anode and the cathode of the photosensitive device.

5. The display panel according to claim 1, characterized in that, The photosensitive device is located on the side of the light-emitting device facing the substrate. The photosensitive device also includes a third electrode. The photosensitive layer is located on the side of the first electrode facing the substrate, and the third electrode is located on the side of the photosensitive layer facing the substrate. The first electrode is the cathode, the second electrode is the anode of the light-emitting device, and the third electrode is the anode of the photosensitive device.

6. The display panel according to claim 5, characterized in that, It also includes an insulating layer, which is disposed along the outer periphery of the light-emitting layer and located between the anode and the cathode of the light-emitting device.

7. The display panel according to any one of claims 1-6, characterized in that, The sub-pixel unit includes a first sub-pixel unit, a second sub-pixel unit, and a third sub-pixel unit. The wavelength of light emitted from the first sub-pixel unit is greater than the wavelength of light emitted from the second sub-pixel unit, and the wavelength of light emitted from the second sub-pixel unit is greater than the wavelength of light emitted from the third sub-pixel unit. At least one of the first sub-pixel units includes the photosensitive device; and / or At least one of the third sub-pixel units includes the photosensitive device.

8. The display panel according to claim 7, characterized in that, It includes a display area and a non-display area. The display area includes a first area and a second area. The first sub-pixel unit or the third sub-pixel unit located in the second area includes the photosensitive device.

9. A display device, characterized in that, The display panel includes any one of claims 1-8.

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