Display panel and display device

Abstract

The invention provides a display panel and a display device, the display panel comprises a first display area, and the display panel comprises a substrate, and a display function layer and an isolation structure which are located on the substrate. At least part of the display function layer is located in the first display area, the display function layer comprises a plurality of light-emitting devices, and the light-emitting devices are provided with light-emitting units. The isolation structure encloses a plurality of first openings, each first opening is internally provided with at least one light-emitting device, the isolation structure isolates the adjacent light-emitting units, and the part, located in the first display area, of the isolation structure is provided with at least one second opening so that the area, where the second openings are distributed, of the display panel can transmit light. The display panel can be applied to the field of under-screen recognition.

Description

Technical Field

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

[0002] Organic Light-Emitting Diode (OLED) is an organic thin film electroluminescent device. It has attracted great attention and is widely used in electronic display products due to its advantages such as simple preparation process, low cost, low power consumption, high brightness, wide viewing angle, high contrast and flexible display.

[0003] However, current electronic display products are limited by their own structural design, making it difficult to further reduce the pixel gap and further apply them to the field of under-screen recognition. Summary of the invention

[0004] In a first aspect, the present disclosure provides a display panel, which includes a first display area, and the display panel includes a substrate, a display function layer and an isolation structure located on the substrate. At least part of the display function layer is located in the first display area, and the display function layer includes a plurality of light-emitting devices, and the light-emitting devices have light-emitting units. The isolation structure encloses a plurality of first openings, each of which is provided with at least one light-emitting device, the isolation structure isolates adjacent light-emitting units, and the portion of the isolation structure located in the first display area is provided with at least one second opening so that the area of ​​the display panel where the second openings are distributed is light-transmissive.

[0005] In the above scheme, the application of the isolation structure can make it possible that the mask plate is not required during the preparation process of the light-emitting device, so there is no need to consider the alignment accuracy of the preparation process, which is beneficial to reducing the gap size of the light-emitting device to improve the pixel PPI of the display panel; in addition, in the first display area, by setting a second opening in the isolation structure, the area of ​​the display panel where the second opening is set can be transparent, so that the first display area of ​​the display panel can realize under-screen recognition functions such as fingerprint recognition, under-screen camera, etc.

[0006] In a specific implementation of the first aspect of the present disclosure, the first display area is the entire display area of ​​the display panel. In this way, the display panel can be applied to transparent display, or to full-screen recognition, such as full-screen fingerprint recognition, or a part of it can be used for under-screen camera, and the rest of it can be applied to under-screen fingerprint recognition, etc.

[0007] In a specific embodiment of the first aspect of the present disclosure, the display panel further includes a second display area, the second display area surrounds at least a portion of the first display area, and the transmittance of the second display area is less than the transmittance of the first display area.

[0008] In a specific embodiment of the first aspect of the present disclosure, the light-emitting device includes an anode and a cathode stacked on a substrate, the light-emitting unit is located between the anode and the cathode, at least a portion of the isolation structure is a conductive structure, and the conductive structure is electrically connected to the cathode of an adjacent light-emitting device and is spaced from the anode.

[0009] In the above solution, the cathodes of the various light emitting devices can be electrically connected through the conductive structure of the isolation structure to form a common electrode, so that the current cathode driving method of the display panel can still be applied.

[0010] For example, the orthographic projection of one end of the conductive structure facing the substrate on the substrate is located within the orthographic projection of one end of the conductive structure facing away from the substrate on the substrate. For example, further, the isolation structure includes a first isolation layer and a second isolation layer stacked, the first isolation layer is located between the substrate and the second isolation layer, the orthographic projection of the first isolation layer on the substrate is located within the orthographic projection of the second isolation layer on the substrate, and the first isolation layer is a conductive structure.

[0011] In the above scheme, at the gap between adjacent light-emitting devices, the isolation structure is generally in the shape of an inverted trapezoid (wide at the top and narrow at the bottom). In this way, during the preparation process of the light-emitting device, the isolation effect of the isolation structure on the light-emitting unit of the light-emitting functional layer can be increased.

[0012] For example, the conductive structure is a metal conductive structure.

[0013] In a specific embodiment of the first aspect of the present disclosure, the display function layer further includes a pixel defining layer, the pixel defining layer is located between the isolation structure and the substrate, and includes a plurality of third openings for defining the light-emitting device, the third openings correspond to the first openings and expose the anode. The orthographic projection of the isolation structure on the substrate coincides with the orthographic projection of the pixel defining layer on the substrate, or the orthographic projection of the isolation structure on the substrate is located within the orthographic projection of the pixel defining layer on the substrate.

[0014] In the above scheme, the conductive part and the anode of the isolation structure can be separated by setting a pixel defining layer, so that the anode can have a larger design size to increase the area of ​​the main light-emitting region of the light-emitting device (equivalent to increasing the aperture ratio).

[0015] In a specific embodiment of the first aspect of the present disclosure, the base includes a substrate and a buffer layer, a gate insulating layer, an interlayer dielectric layer and a planar layer located on the substrate, and at least one of the pixel defining layer, the substrate, the buffer layer, the gate insulating layer, the interlayer dielectric layer and the planar layer is provided with a via, and the via corresponds to the second opening and is connected to each other.

[0016] In the above solution, the provision of the via hole is equivalent to increasing the depth of the second opening, so as to increase the light transmittance of the first display area.

[0017] In a specific embodiment of the first aspect of the present disclosure, the light-emitting devices are classified into at least a first light-emitting device, a second light-emitting device and a third light-emitting device, the wavelengths of the emitted lights of the first light-emitting device, the second light-emitting device and the third light-emitting device decrease successively, the second opening is provided in plurality, and in the first display area, the first light-emitting device is provided adjacent to the second opening.

[0018] In the above scheme, the wavelength of the emitted light of the first light-emitting device is the largest, so the first light-emitting device generally has a higher luminous efficiency. In the actual process, by preferentially ensuring that the second opening is set around the first light-emitting device, the adverse effect of the design of the second opening on the second light-emitting device and / or the third light-emitting device (area reduction) can be reduced or avoided, so that the display device can maintain a good display effect.

[0019] For example, along the length direction of the first light emitting device, the first light emitting device and the corresponding second opening are arranged in sequence. For example, further, in the case where a second display area is provided, the length of the first light emitting device in the first display area is less than the length of the first light emitting device in the second display area.

[0020] In a specific embodiment of the first aspect of the present disclosure, in the first display area, all the second openings are arranged adjacent to the first light emitting device. For example, further in the first display area, the second light emitting device and the third light emitting device are equal in length, and the length of the second light emitting device is greater than the length of the first light emitting device.

[0021] In another specific embodiment of the first aspect of the present disclosure, in the first display area, all the second openings are arranged adjacent to the first light emitting device and the second light emitting device.

[0022] For example, along the length direction of the first light emitting device, the first light emitting device and the adjacent second opening are arranged in sequence, and along the length direction of the second light emitting device, the second light emitting device and the adjacent second opening are arranged in sequence.

[0023] For example, further, in the first display area, the length of the third light emitting device is greater than the lengths of the first light emitting device and the second light emitting device.

[0024] For example, further, the area of ​​the second opening corresponding to the second light-emitting device is equal to the area of ​​the second opening corresponding to the first light-emitting device; or, the area of ​​the second opening corresponding to the second light-emitting device is smaller than the area of ​​the second opening corresponding to the first light-emitting device, for example, further, the length of the second opening corresponding to the second light-emitting device is smaller than the length of the second opening corresponding to the first light-emitting device.

[0025] For example, further, the second openings corresponding to the first light emitting device and the second light emitting device respectively and adjacent to each other are communicated.

[0026] For example, further, in the case where the second display area is provided, the length of the second light emitting device located in the first display area is smaller than the length of the second light emitting device located in the second display area.

[0027] In another specific embodiment of the first aspect of the present disclosure, in the first display area, the first light emitting device, the second light emitting device and the third light emitting device are all arranged adjacent to the second opening.

[0028] For example, along the length direction of the second light emitting device, the second light emitting device and the corresponding second opening are arranged in sequence, and / or, along the length direction of the third light emitting device, the third light emitting device and the corresponding second opening are arranged in sequence.

[0029] For example, further, the area of ​​the second opening corresponding to the second light-emitting device is smaller than the area of ​​the second opening corresponding to the first light-emitting device, and the area of ​​the second opening corresponding to the third light-emitting device is smaller than the area of ​​the second opening corresponding to the second light-emitting device, so that the length of the second light-emitting device is greater than the length of the first light-emitting device and less than the length of the third light-emitting device.

[0030] For example, further, the length of the second opening corresponding to the third light emitting device is smaller than the length of the second opening corresponding to the second light emitting device, and the length of the second opening corresponding to the second light emitting device is smaller than the length of the second opening corresponding to the first light emitting device.

[0031] For example, further, the second openings corresponding to the first light emitting device, the second light emitting device and the third light emitting device respectively and adjacent to each other are connected. In this case, the opening pattern formed by connecting the second openings corresponding to the first light emitting device, the second light emitting device and the third light emitting device has a stepped side facing the corresponding light emitting device.

[0032] For example, further, in the case where a second display area is provided, the length of the second light-emitting device located in the first display area is smaller than the length of the second light-emitting device located in the second display area, and the length of the third light-emitting device located in the first display area is smaller than the length of the third light-emitting device located in the second display area.

[0033] In a specific embodiment of the first aspect of the present disclosure, the first light emitting device, the second light emitting device and the third light emitting device are arranged in multiple rows and columns, the first light emitting device, the second light emitting device and the third light emitting device are in different columns, and each row is arranged with the first light emitting device, the second light emitting device and the third light emitting device. For example, further, the length direction of the first light emitting device, the second light emitting device and the third light emitting device is the same as the direction of the column.

[0034] In another specific embodiment of the first aspect of the present disclosure, the first light-emitting device, the second light-emitting device and the third light-emitting device are arranged in multiple rows and columns, the first light-emitting device and the second light-emitting device are arranged in a part of the columns, and the third light-emitting device is arranged in another part of the columns, and in the columns arranged with the first light-emitting device, the first light-emitting device and the second light-emitting device are arranged alternately along the direction of the column, and the columns arranged with the first light-emitting device and the second light-emitting device are arranged alternately with the columns arranged with the third light-emitting device along the direction of the row. For example, further, the length direction of the first light-emitting device, the second light-emitting device and the third light-emitting device is the same as the direction of the column.

[0035] In a specific implementation of the first aspect of the present disclosure, the first openings correspond to the light-emitting devices one by one, so that only one light-emitting device is disposed in each first opening.

[0036] In a specific embodiment of the first aspect of the present disclosure, the shape of the orthographic projection of the second opening on the substrate is a grid. In the first display area, the mesh of the second opening corresponds to the first opening, and the orthographic projection of the first opening on the substrate is located within the orthographic projection of the corresponding mesh on the substrate.

[0037] In the above solution, the total area of ​​the second opening of the isolation structure in the first display area can be increased, thereby improving the light transmittance of the first display area.

[0038] For example, further, at least two light-emitting devices are arranged in each first opening, and the light-emitting devices located in the same first opening have the same light-emitting color.

[0039] In the above scheme, by concentrating light-emitting devices with the same emitted light in one first opening, the spacing between light-emitting devices located in different first openings and adjacent to each other can be increased without reducing the design area and arrangement density (PPI) of the light-emitting devices, thereby reducing the difficulty of preparing the second opening in the isolation structure, which is conducive to designing the second opening into a grid shape.

[0040] In a specific embodiment of the first aspect of the present disclosure, the display panel may further include a transparent conductive layer, the transparent conductive layer is located between the isolation structure and the substrate, and is connected to the isolation structure. The conductive layer has a fourth opening, the fourth opening corresponds to the first opening, and the orthographic projection of the first opening on the substrate is located within the orthographic projection of the corresponding fourth opening on the substrate, and the orthographic projection of the second opening on the substrate is located within the orthographic projection of the conductive layer on the substrate.

[0041] In the above scheme, in the first display area, the isolation structure will be divided into annular conductive units spaced apart from each other by the grid-shaped second opening, and the annular conductive units define the first opening. The annular conductive units can be connected through a transparent conductive layer so that the cathode can still be electrically connected through the isolation structure and the conductive layer to form a common electrode.

[0042] A second aspect of the present disclosure provides a display device, comprising an identification device and a display panel in any one of the embodiments of the first aspect, wherein an orthographic projection of the identification device on a substrate at least partially overlaps with a first display area.

[0043] For example, in a specific embodiment of the second aspect of the present disclosure, the identification device includes at least one fingerprint identification sensor. Further preferably, the fingerprint identification sensor is located inside the substrate.

[0044] For example, in another specific implementation of the second aspect of the present disclosure, the identification device is a camera, and the camera is located on a side of the substrate away from the display function layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 Shown is a schematic diagram of a planar structure of a display panel provided in one embodiment of the present disclosure.

[0046] Figure 2 for Figure 1 An enlarged view of the S region of the display panel is shown.

[0047] Figure 3 for Figure 2 A schematic plan view of the isolation structure in the display panel is shown.

[0048] Figure 4 for Figure 2 The display panel is shown in a cross-sectional view along line M1 - N1 .

[0049] Figure 5 for Figure 2 The display panel is shown in a cross-sectional view along M2 - N2 .

[0050] Figure 6 This is an enlarged view of a partial area of ​​a first display region of another display panel provided by an embodiment of the present disclosure.

[0051] Figure 7 for Figure 6 A schematic diagram of the planar structure of the isolation structure in the display panel is shown.

[0052] Figure 8 This is an enlarged view of a partial area of ​​a first display region of another display panel provided by an embodiment of the present disclosure.

[0053] Fig. 9for Figure 8 A schematic diagram of the planar structure of the isolation structure in the display panel is shown.

[0054] Fig.10 This is an enlarged view of a partial area of ​​a first display region of another display panel provided by an embodiment of the present disclosure.

[0055] Fig.11 for Fig.10 A schematic diagram of the planar structure of the isolation structure in the display panel is shown.

[0056] Fig.12 This is an enlarged view of a partial area of ​​a first display region of another display panel provided by an embodiment of the present disclosure.

[0057] Fig.13 for Fig.12 A schematic diagram of the planar structure of the isolation structure in the display panel is shown.

[0058] Fig.14 This is an enlarged view of a partial area of ​​the first display region of another display panel provided by an embodiment of the present disclosure.

[0059] Fig.15 This is an enlarged view of a partial area of ​​the first display region of another display panel provided by an embodiment of the present disclosure.

[0060] Fig.16 A cross-sectional view of a partial area of ​​another display panel provided by an embodiment of the present disclosure.

[0061] Fig.17 This is an enlarged view of a partial area of ​​the first display region of another display panel provided by an embodiment of the present disclosure.

[0062] Fig.18 A cross-sectional view of a partial area of ​​a display panel provided by an embodiment of the present disclosure.

[0063] Fig.19 A cross-sectional view of a partial area of ​​a display panel provided by an embodiment of the present disclosure.

[0064] Figure 20 to Figure 23 for Fig.19 A process diagram of a method for preparing a display panel is shown.

[0065] Fig.24 A cross-sectional view of a display device provided in accordance with an embodiment of the present disclosure.

[0066] Description of reference numerals:

[0067] 100-substrate; 200-light-emitting device in the display function layer; 210-anode; 220-light-emitting unit; 221-first common layer; 222-light-emitting layer; 223-second common layer; 230-cathode; 300-isolation structure; 301-first opening; 302-second opening; 310-first isolation layer; 320-second isolation layer; 330-conductive unit; 400-pixel defining layer; 500-transparent conductive layer; 600-protective layer; 700-photoresist pattern. DETAILED DESCRIPTION

[0068] The following will be combined with the drawings in the embodiments of this specification to clearly and completely describe the technical solutions in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this specification.

[0069] In display products, some functional film layers in the light-emitting devices are formed by evaporation, and there are multiple functional film layers in each light-emitting device, and the materials of some functional film layers (such as light-emitting layers) in the light-emitting devices that emit different light are different. Therefore, when evaporating these functional film layers through a mask plate (such as a fine mask plate), multiple alignments are required. In order to ensure the alignment accuracy, sufficient space needs to be reserved between different light-emitting devices, which limits the arrangement density of the light-emitting devices (which can be called sub-pixels), making it difficult to further improve the PPI (pixel density) of the display panel.

[0070] In the present disclosure, an isolation structure is provided at the gap between the light-emitting devices to separate the functional film layers of the adjacent light-emitting devices. Thus, in the evaporation process of the functional film layer, it is only necessary to perform evaporation on the entire surface of the display panel without using a mask plate to prepare the functional film layer of each light-emitting device separately. The process does not need to consider the alignment accuracy during evaporation, so that the gap between the light-emitting devices can be designed to be smaller in size to increase the PPI (the principle can be seen in FIG. Figure 20 to Figure 23 (See also the relevant description in the relevant embodiments).

[0071] However, the setting of the isolation structure will block the gap between the light-emitting devices and prevent light from passing through, making it difficult to apply to scenarios such as under-screen fingerprint recognition and under-screen photography.

[0072] The embodiments of the present disclosure provide a display panel and a display device to at least solve the above technical problems. The display panel includes a first display area, and the display panel includes a substrate and a display function layer and an isolation structure located on the substrate. At least part of the display function layer is located in the second display area, and the display function layer includes a plurality of light-emitting devices, and the light-emitting devices have light-emitting units. The isolation structure encloses a plurality of first openings, each of which is provided with at least one light-emitting device, the isolation structure isolates adjacent light-emitting units, and the portion of the isolation structure located in the first display area is provided with at least one second opening so that the area of ​​the display panel where the second opening is distributed is transparent. In this design, the application of the isolation structure can make it possible to eliminate the need for a mask plate in the preparation process of the light-emitting device, so there is no need to consider the alignment accuracy of the preparation process, which is conducive to reducing the gap size of the light-emitting device to improve the pixel PPI of the display panel; in addition, in the first display area, by providing a second opening in the isolation structure, the area of ​​the display panel where the second opening is provided can be transparent, so that the first display area of ​​the display panel can realize the under-screen recognition function such as fingerprint recognition, under-screen camera, etc.

[0073] The structure of the display panel and the display device in at least one embodiment of the present disclosure is described in detail below in conjunction with the accompanying drawings. In addition, in these drawings, a spatial rectangular coordinate system is established with the substrate in the display panel as a reference to intuitively present the positional relationship of each component in the display panel. In the spatial rectangular coordinate system, the X-axis and the Y-axis are parallel to the surface where the substrate is located, and the Z-axis is perpendicular to the surface where the substrate is located.

[0074] like Figures 1 to 5 As shown, the plane area of ​​the display panel 10 can be divided into a first display area 13, a second display area 11, and a border area 12 surrounding the second display area 11. Sub-pixels (the entity is a light-emitting device 200) such as R, G, and B can be arranged in the first display area 13 and the second display area 11. The second display area 11 surrounds the first display area 13, and the first display area 13 is set to have a certain light transmittance for under-screen recognition. It should be noted that in some embodiments of the present disclosure, part of the wiring in the border area 12 can be arranged in the second display area 11, so that the border area 12 can be designed as a single-sided border.

[0075] In some embodiments of the present disclosure, Figures 1 to 5 As shown, in the display panel, only the first display area 13 is set to be light-transmissive for under-screen identification, that is, the transmittance of the second display area 11 is less than the transmittance of the first display area 13, or the second display area 11 is set to be opaque.

[0076] In other embodiments of the present disclosure, the first display area can be designed as the entire display area of ​​the display panel, that is, there is no second display area 11. In this way, the display panel can be applied to transparent display, or to full-screen recognition, such as full-screen fingerprint recognition, or a part of it can be used for under-screen camera, and the other part can be applied to under-screen fingerprint recognition, etc.

[0077] Below, Figures 1 to 5 Taking the display panel shown as an example, the specific structure of the display panel provided by the present disclosure is described in detail.

[0078] The physical structure of the display panel 10 may include a substrate 100, and a display function layer and an isolation structure 300 located on the substrate 100. The display function layer is located in the first display area 13 and the second display area 11, and the display function layer includes a plurality of light-emitting devices 200, and the light-emitting devices 200 have light-emitting units 220. The isolation structure 300 encloses a plurality of first openings 301, and at least one light-emitting device 200 is disposed in each first opening 301. The isolation structure 300 isolates adjacent light-emitting units 220, and the portion of the isolation structure 300 located in the first display area is provided with at least one second opening 302 so that the area of ​​the display panel where the second openings 302 are distributed is light-transmissive for under-screen recognition.

[0079] In at least one embodiment of the present disclosure, Figures 1 to 5 The light-emitting device 200 shown includes an anode 210 and a cathode 230 stacked on a substrate 100, and a light-emitting unit 220 is located between the anode 210 and the cathode 230. The light-emitting unit 220 may include a first common layer 221, a light-emitting layer 222, and a second common layer 223, and the first common layer 221, the light-emitting layer 222, and the second common layer 223 are sequentially stacked on the anode 210. The first common layer 221 may include a hole injection layer, a hole transport layer, an electron blocking layer, etc., and the second common layer 223. The second common layer 223 may include an electron injection layer, an electron transport layer, a hole blocking layer, etc. The setting of the isolation structure 300 needs to make the first common layer 221 (the main film layer causing current crosstalk) of each light-emitting device 200 electrically disconnected from each other.

[0080] In at least one embodiment of the present disclosure, at least a portion of the isolation structure 300 is a conductive structure (e.g., the first isolation layer 310 described below), which is electrically connected to the cathode 230 of the adjacent light-emitting device 200 and spaced apart from the anode 210. In this way, the cathodes 230 of the respective light-emitting devices 200 can be electrically connected through the conductive structure of the isolation structure 300 to form a common electrode, so that the current driving method of the cathode 230 of the display panel (e.g., driven by one or a few common electrode lines) can still be applied.

[0081] In the embodiment of the present disclosure, the partition structure 300 can be designed to be wide at the top and narrow at the bottom, so that the first common layer 221 (the main film layer causing current crosstalk) is disconnected by the partition structure 300 during evaporation. Figure 4 and Figure 5 As shown, the orthographic projection of one end of the conductive structure of the partition structure 300 facing the substrate 100 on the substrate 100 is located within the orthographic projection of one end of the conductive structure facing away from the substrate 100 on the substrate 100 .

[0082] It should be noted that in the embodiments of the present disclosure, while ensuring that the partition structure is wide at the top and narrow at the bottom, the specific shape of the partition structure is not further restricted. Below, several configuration methods of the partition structure are briefly described through embodiments.

[0083] For example, in some embodiments of the present disclosure, Figure 4 and Figure 5 As shown, the isolation structure 300 includes a stacked first isolation layer 310 and a second isolation layer 320, the first isolation layer 310 is located between the substrate 100 and the second isolation layer 320, the orthographic projection of the first isolation layer 310 on the substrate 100 is located within the orthographic projection of the second isolation layer 320 on the substrate 100, and the first isolation layer 310 is a conductive structure. For example, further, along the direction perpendicular to the substrate 100, the cross-sectional shape of the first isolation layer 310 is a positive trapezoid, and the isolation layer 320 is located at the top edge of the first isolation layer 310. In this case, it is convenient for the evaporation material of the cathode 230 to be deposited on the side wall of the first isolation layer 310, so as to improve the overlap yield of the cathode 230 and the first isolation layer 310.

[0084] In some other embodiments of the present disclosure, the isolation structure is an integrated structure. For example, further, along the direction perpendicular to the substrate, the cross-sectional shape of the isolation structure is an inverted trapezoid, with the top edge of the inverted trapezoid facing the substrate. Under this design, the side wall of the isolation structure is an inscribed structure, thereby increasing the isolation effect of the isolation structure.

[0085] For example, in the embodiment of the present disclosure, the conductive structure is a metal conductive structure. The metal material has high conductivity and can reduce the voltage drop when driving the cathode. Accordingly, the metal material can only be light-transmissive when the thickness is extremely thin, and the isolation structure 300 needs a certain thickness to isolate the light-emitting unit. Therefore, the conductive structure in the isolation structure 300 (such as the first isolation layer 310 described below) is almost opaque. Therefore, only by setting the second opening 302 can the isolation structure 300 be made light-transmissive.

[0086] In at least one embodiment of the present disclosure, Figure 4 and Figure 5As shown, the display function layer may further include a pixel defining layer 400, the pixel defining layer 400 is located between the isolation structure 300 and the substrate 100, and includes a plurality of third openings (not shown in the figure) for defining the light-emitting device 200, and the third openings correspond to the first openings 301 for exposing the anode 210. In this way, by providing the pixel defining layer 400, the conductive portion of the isolation structure 300 and the anode 210 can be spaced apart, so that the anode 210 can have a larger design size to increase the area of ​​the main light-emitting region of the light-emitting device 200 (equivalent to increasing the aperture ratio). It should be noted that the area where the third opening is located can represent the main light-emitting region of the light-emitting device.

[0087] For example, in some embodiments of the present disclosure, the orthographic projection of the isolation structure 300 on the substrate 100 coincides with the orthographic projection of the pixel defining layer 400 on the substrate 100, that is, the third opening is opposite to the first opening 301 and has the same area, so that the isolation structure 300 completely covers the gap of the light-emitting device.

[0088] For example, in some other embodiments of the present disclosure, the orthographic projection of the isolation structure 300 on the substrate 100 is located within the orthographic projection of the pixel defining layer 400 on the substrate 100, that is, the area of ​​the third opening is smaller than the area of ​​the first opening 301, so that the light emission angle of the light-emitting device can be increased to increase the viewing angle of the display image of the display panel.

[0089] In at least one embodiment of the present disclosure, the light emitting devices can be classified into light emitting devices that emit light of different colors, for example, Figures 2 to 5 As shown, the light-emitting device 200 is classified into at least a first light-emitting device R (emitting red light R), a second light-emitting device G (emitting red light G) and a third light-emitting device B (emitting red light B), and the wavelengths of the emitted light of the first light-emitting device R, the second light-emitting device G and the third light-emitting device B decrease successively.

[0090] In an embodiment of the present disclosure, the second opening can be set to multiple, so as to be dispersedly arranged in the gaps of the light-emitting device according to the shape and distribution of the light-emitting device, or the second opening can be set to one to have a larger size, thereby increasing the transmittance of the first display area.

[0091] The following describes in detail the arrangement of the second openings in the above two designs and the corresponding display panel structures through different embodiments.

[0092] In some embodiments of the present disclosure, Figures 1 to 5As shown, the second opening 302 is provided in plurality, and in the first display area 13, the first light emitting device R is provided adjacent to the second opening 302. The wavelength of the emitted light of the first light emitting device R (R) is the largest, so the first light emitting device R generally has a higher light emitting efficiency. In the actual process, by preferentially ensuring that the second opening 302 is provided around the first light emitting device R, the adverse effect (area reduction) of the design of the second opening 302 on the second light emitting device G and / or the third light emitting device B is reduced or avoided, so that the display device can maintain a good display effect.

[0093] For example, Figure 2 and Figure 3 As shown, the first light emitting devices R and the corresponding second openings 302 are arranged in sequence along the length direction of the first light emitting devices R. This method does not need to narrow the width of the first light emitting devices R due to the arrangement of the second openings 302, thereby reducing the difficulty of arranging the second openings 302.

[0094] For example, the size of the first light emitting device R in the first display area 13 may be reduced to reserve space for the arrangement of the second opening 302 , that is, the length of the first light emitting device R in the first display area is less than the length of the first light emitting device R in the second display area.

[0095] It should be noted that providing a second opening on one side of the light emitting device will affect the size (e.g., length) of the light emitting device. Therefore, the second opening may be provided on one side of one or more of the first light emitting device, the second light emitting device, and the third light emitting device. The above different options are described below through different embodiments.

[0096] In some embodiments of the present disclosure, Figures 1 to 5 As shown, in the first display area 13, all the second openings 302 are arranged adjacent to the first light-emitting device R, that is, the arrangement of the second openings 302 will not affect the light extraction efficiency of the second light-emitting device G and the third light-emitting device B. For example, in the first display area 13, the lengths of the second light-emitting device G and the third light-emitting device B are equal, and the length of the second light-emitting device G is greater than the length of the first light-emitting device R, that is, in the first display area 13, the arrangement of the second openings 302 only needs to shorten the length of the first light-emitting device R.

[0097] In other embodiments of the present disclosure, Figure 6 and Figure 7 As shown, in the first display area, all the second openings 302 are arranged adjacent to the first light emitting device R and the second light emitting device G, that is, the arrangement of the second openings 302 will not affect the light extraction efficiency of the third light emitting device B.

[0098] For example, Figure 6 and Figure 7 As shown, along the length direction of the first light emitting device R, the first light emitting device R and the adjacent second opening 302 are arranged in sequence, and along the length direction of the second light emitting device G, the second light emitting device G and the adjacent second opening 302 are arranged in sequence. For example, in the first display area, the length of the third light emitting device B is greater than the length of the first light emitting device R and the second light emitting device G, that is, in the first display area 13, the provision of the second opening 302 needs to shorten the length of the first light emitting device R and the second light emitting device G.

[0099] For example, in some embodiments, the area of ​​the second opening corresponding to the second light emitting device is equal to the area of ​​the second opening corresponding to the first light emitting device.

[0100] For example, in other embodiments, Figure 6 and Figure 7 As shown, the area of ​​the second opening 302 corresponding to the second light emitting device G is smaller than the area of ​​the second opening 302 corresponding to the first light emitting device R. In this way, the influence of the second opening 302 on the light emitting efficiency of the second light emitting device G can be reduced.

[0101] For example, Figure 6 and Figure 7 As shown, along the Y-axis direction (the length direction of the light-emitting device), the length of the second opening 302 corresponding to the second light-emitting device G is smaller than the length of the second opening 302 corresponding to the first light-emitting device R.

[0102] For example, Figure 8 and Fig. 9 As shown, the second openings 302 corresponding to the first light emitting device R and the second light emitting device G respectively and adjacent to each other are connected, thereby increasing the total area of ​​the second openings 302 to increase the light transmittance of the first display area. In this way, when the lengths of the second openings 302 corresponding to the first light emitting device R and the second light emitting device G are different, the opening pattern formed by the second openings 302 corresponding to the first light emitting device R and the second light emitting device G and connected to each other presents a stepped shape ( Figure 8 The middle is the second level ladder).

[0103] It should be noted that for Figures 6 to 9 The second opening 302 shown can reserve space for the arrangement of the second opening 302 by reducing the size of the first light-emitting device R and the second light-emitting device G in the first display area, that is, the length of the second light-emitting device G located in the first display area is less than the length of the second light-emitting device G located in the second display area.

[0104] In other embodiments of the present disclosure, Figure 10 to Figure 11As shown, in the first display area, the first light emitting device R, the second light emitting device G and the third light emitting device B are all disposed adjacent to the second opening 302 .

[0105] For example, Fig.10 and Fig.11 As shown, along the length direction of the second light emitting device G, the second light emitting device G and the corresponding second opening 302 are arranged in sequence, and / or, along the length direction of the third light emitting device B, the third light emitting device B and the corresponding second opening 302 are arranged in sequence.

[0106] For example, further, the area of ​​the second opening 302 corresponding to the second light emitting device G is smaller than the area of ​​the second opening 302 corresponding to the first light emitting device R, and the area of ​​the second opening 302 corresponding to the third light emitting device B is smaller than the area of ​​the second opening 302 corresponding to the second light emitting device G, so that the length of the second light emitting device G is greater than the length of the first light emitting device R and less than the length of the third light emitting device B. For example, Fig.10 and Fig.11 As shown, along the Y-axis direction (the length direction of the light-emitting device), the length of the second opening 302 corresponding to the second light-emitting device G is less than the length of the second opening 302 corresponding to the first light-emitting device R, and is greater than the length of the second opening 302 corresponding to the third light-emitting device B. In this way, in the first display area, the shortened lengths of the first light-emitting device R, the second light-emitting device G, and the third light-emitting device B decrease in sequence, thereby preventing the light-emitting efficiency of some light-emitting devices with low light-emitting efficiency, such as the third light-emitting device B, from being too low, thereby preventing the display device from having color shift.

[0107] For example, Fig.12 and Fig.13 As shown, the second openings 302 corresponding to the first light emitting device R, the second light emitting device G and the third light emitting device B respectively and adjacent to each other are connected, thereby further increasing the total area of ​​the second openings 302 to further increase the light transmittance of the first display area. In this way, the opening pattern formed by the second openings 302 corresponding to the first light emitting device R, the second light emitting device G and the third light emitting device B and connected to each other presents a stepped shape ( Fig.12 There are three steps in the middle).

[0108] It should be noted that for Figures 10 to 13 The second opening 302 shown can reserve space for the arrangement of the second opening 302 by synchronously reducing the sizes of the first light-emitting device R, the second light-emitting device G and the third light-emitting device B in the first display area, that is, the length of the second light-emitting device G located in the first display area is smaller than the length of the second light-emitting device G located in the second display area, and the length of the third light-emitting device B located in the first display area is smaller than the length of the third light-emitting device B located in the second display area.

[0109] In the embodiment of the present disclosure, when there are multiple second openings, the arrangement of the second openings can be adjusted according to the arrangement of the light-emitting devices, which is explained below through several specific examples.

[0110] In some embodiments of the present disclosure, it is possible to refer to Figure 2 , Figures 7 to 13 As shown, the first light-emitting device R, the second light-emitting device G and the third light-emitting device B are arranged in multiple rows and columns, the row direction may be the direction of the X-axis, the column direction may be the direction of the Y-axis, the first light-emitting device R, the second light-emitting device G and the third light-emitting device B are in different columns, that is, the light-emitting devices in the same column have the same light-emitting color, and each row is arranged with the first light-emitting device R, the second light-emitting device G and the third light-emitting device B, for example, in each row, each adjacent first light-emitting device R, the second light-emitting device G and the third light-emitting device B constitute a pixel (which may be called a pixel unit or a large pixel, etc., and each light-emitting device may be called a sub-pixel or a sub-pixel). For example, further, the length direction of the first light-emitting device R, the second light-emitting device G and the third light-emitting device B is the same as the column direction.

[0111] In other embodiments of the present disclosure, Fig.14 As shown, the first light-emitting device R, the second light-emitting device G and the third light-emitting device B are arranged in multiple rows and columns, the first light-emitting device R and the second light-emitting device G are arranged in a part of the columns, and the third light-emitting device B is arranged in another part of the columns. In the column where the first light-emitting device R is arranged, the first light-emitting device R and the second light-emitting device G are arranged alternately along the direction of the column, and the column where the first light-emitting device R and the second light-emitting device G are arranged is arranged alternately with the column where the third light-emitting device B is arranged along the direction of the row. For example, three mutually adjacent first light-emitting devices R, second light-emitting devices G and third light-emitting devices B constitute a pixel (which can be called a pixel unit or a large pixel, etc., and each light-emitting device can be called a sub-pixel or a sub-pixel). This design can increase the design area of ​​the third light-emitting device B (for example, the length is increased), thereby ensuring the light extraction efficiency of the third light-emitting device B. For example, further, the length direction of the first light-emitting device R, the second light-emitting device G and the third light-emitting device B is the same as the direction of the column. In this design, the second opening 302 can be arranged before the first light-emitting device R and the second light-emitting device G in the same column. It should be noted that, in the case of Fig.14In the design shown, the number of third light-emitting devices B in each column is approximately 1 / 2 of the number of light-emitting devices in adjacent columns. Therefore, in some designs, the design area of ​​the third light-emitting device B can be increased (for example, the length can be increased) to ensure the luminous efficiency of the third light-emitting device B; or, in other designs, the design area of ​​the third light-emitting device B can be kept unchanged so that a larger gap can exist between adjacent third light-emitting devices B. In this way, a second opening can be set between adjacent third light-emitting devices B.

[0112] like Figures 2 to 14 As shown, in the case where a plurality of second openings 302 are provided, the first openings 301 may be designed to correspond to the light emitting devices 200 one by one, so that only one light emitting device 200 is provided in each first opening 301 .

[0113] In other embodiments of the present disclosure, Fig.15 and Fig.16 As shown, the orthographic projection of the second opening 302 on the substrate 100 is in a grid shape, and in the first display area, the mesh of the second opening 302 corresponds to the first opening 301, and the orthographic projection of the first opening 301 on the substrate 100 is located within the orthographic projection of the corresponding mesh on the substrate 100. In this way, the total area of ​​the second opening 302 of the isolation structure 300 in the first display area can be increased, thereby improving the light transmittance of the first display area.

[0114] like Fig.15 As shown, in the first display area, the isolation structure 300 is divided into annular conductive units 330 spaced apart from each other by the grid-shaped second opening 302, and the annular conductive units 330 define the first opening. In the embodiment of the present disclosure, the annular conductive units 330 can be connected by setting transparent electrodes, for example, Fig.16 As shown, the display panel may further include a transparent conductive layer 500, which is located between the isolation structure 300 and the substrate 100 and connected to the isolation structure 300. The conductive layer 500 has a fourth opening (not shown, which is equivalent to the fourth opening being in a grid shape), the fourth opening corresponds to the first opening, and the orthographic projection of the first opening on the substrate 100 is located within the orthographic projection of the corresponding fourth opening on the substrate 100, and the orthographic projection of the second opening 302 on the substrate 100 is located within the orthographic projection of the conductive layer on the substrate 100. In this way, the annular conductive units 330 can be connected through the transparent conductive layer 500, so that the cathode 230 can still be electrically connected to the conductive layer 500 through the isolation structure 300 to form a common electrode.

[0115] In the case where the second opening is arranged in a grid shape, a light emitting device (such as Fig.15As shown), multiple light-emitting devices can also be set.

[0116] For example, Fig.17 As shown, at least two light-emitting devices 200 are arranged in each first opening 301, and the light-emitting devices 200 located in the same first opening 301 have the same light-emitting color. The difference in driving voltage of light-emitting devices with the same light-emitting color is small, and even if they are arranged in the same first opening 301, the degree of current crosstalk will be relatively low. In this way, by concentrating light-emitting devices 200 with the same light-emitting light in one first opening 301, the spacing between light-emitting devices 200 located in different first openings 301 and adjacent to each other can be increased without reducing the design area and arrangement density (PPI) of the light-emitting devices 200, thereby reducing the difficulty of preparing the second opening 302 in the isolation structure 300, so as to facilitate the design of the second opening 302 into a grid shape.

[0117] For example, the substrate 100 may include a substrate and a driving circuit layer located on the substrate, the driving circuit layer includes a plurality of pixel driving circuits located in the second display area, and the display function layer is located on the driving circuit layer. For example, the pixel driving circuit may include a plurality of transistors TFT, capacitors, etc., for example, formed in various forms such as 2T1C (i.e., 2 transistors (TFT) and 1 capacitor (C)), 3T1C or 7T1C. The pixel driving circuit is connected to the light emitting device 200 to control the switching state and the light emitting brightness of the light emitting device 200.

[0118] For example, Fig.18 As shown, the substrate 100 may include a substrate 110 for carrying a driving circuit layer, and the substrate 100 may also include a buffer layer 120 located between the driving circuit layer and the substrate 110, and the buffer layer 120 is used to isolate harmful ions (such as hydrogen ions, etc.) in the substrate 110. The driving circuit layer also includes an insulating film layer for limiting various structures of the driving circuit (such as various signal lines, electrodes of capacitors, active layers, source-drain electrodes, gate electrodes, etc. in TFTs), and these insulating film layers may include a gate insulating layer 130, an interlayer dielectric layer 140, a planar layer 150, etc.

[0119] In the embodiment of the present disclosure, the second opening may be deepened to increase the light transmittance of the first display area, that is, at least one of the pixel defining layer, the substrate, the buffer layer, the gate insulating layer, the interlayer dielectric layer and the planar layer is provided with a via hole, and the via hole corresponds to the second opening and is connected to each other. Fig.18 As shown, the pixel defining layer 400 , the buffer layer 120 , the gate insulating layer 130 , the interlayer dielectric layer 140 and the planar layer 150 define a via 303 , which corresponds to the second opening 302 and is connected to each other, that is, the setting of the via 303 is equivalent to increasing the depth of the second opening 302 .

[0120] It should be noted that in the embodiments of the present disclosure, a plurality of vias may be provided, and the depths of the vias at different positions may be the same, or may be provided differently. For example, the depth of some vias may extend through the substrate, and the depth of some vias may only pass through the pixel defining layer. In addition, in the case where a plurality of second openings are provided, a via may be provided under each second opening, or vias may be provided only under some of the second openings. In addition, in the case where the second openings are provided in a grid shape, the vias are not limited to being in a grid shape. For example, the vias may be provided in a grid shape, and the grid-shaped vias may be provided to only pass through the pixel defining layer, or to pass through the pixel defining layer and the planar layer, so as to avoid the setting of the vias affecting the circuit structure in the driving circuit layer. Alternatively, the vias may be provided in a plurality to be dispersedly arranged under the grid-shaped second openings.

[0121] In at least one embodiment of the present disclosure, Fig.19 As shown, the display panel may further include a protective layer 600, which at least covers the light-emitting device 200 to protect the film layer of the light-emitting device 200 during the preparation process of the display panel. It should be noted that the light-emitting devices 200 with different emitted lights are independently manufactured, but the film layer (evaporated film layer such as a light-emitting unit, etc.) in each light-emitting device 200 is evaporated on the entire surface of the display panel during evaporation. For example, the light-emitting device 200 is classified into light-emitting devices that emit red light (R), green light (G) and blue light (B), respectively. During the preparation process, the light-emitting devices R, G, and B are prepared in sequence. When preparing the light-emitting device R, a light-emitting device R is formed in each first opening. A protective layer 600 is prepared on the display panel to cover the light-emitting device G, and then the protective layer 600 in part of the first opening (used to form the light-emitting devices G and B in the final product) and the cathode and the light-emitting unit of the light-emitting device R are removed. In this process, the protective layer 600 is used to protect the light-emitting devices R in other first openings. Based on this method, the light-emitting devices G and B are prepared in sequence, and finally formed as shown in the following. Fig.19 A protective layer 600 is shown.

[0122] It should be noted that the protective layer has achieved the encapsulation effect for the light-emitting device, so the protective layer can also be called an encapsulation layer (only one film layer is provided) or one of the encapsulation layers (when there are multiple encapsulation film layers).

[0123] Next, combine Figure 20 to Figure 23 right Fig.19 The preparation process of the display panel shown is described.

[0124] like Fig. 20As shown, a substrate 100 is provided and an array of anodes 210 are formed on the substrate 100; an insulating material film layer (e.g., an inorganic material film layer) is deposited on the substrate 100 on which the anodes 210 are formed; a first isolation layer 310 and a second isolation layer 320 are formed on the display panel, wherein a first opening and a second opening are formed (not shown in the figure, refer to the previous series of drawings); a composition process is performed on the insulating material film layer to form a pixel defining layer 400 (the plane shape is a grid shape), and the pixel defining layer 400 covers the gaps between adjacent anodes 210, so that the plane shape of the pixel defining layer 400 is a grid shape.

[0125] In an embodiment of the present disclosure, the patterning process may be a photolithography patterning process, which may include, for example, coating a photoresist on a structure layer to be patterned, exposing the photoresist using a mask, developing the exposed photoresist to obtain a photoresist pattern, etching the structure layer using the photoresist pattern (optionally wet etching or dry etching), and then optionally removing the photoresist pattern. It should be noted that, in the case where the material of the structure layer (such as the photoresist pattern 700 described below) includes photoresist, the structure layer may be directly exposed through a mask to form a desired pattern.

[0126] like Fig.21 As shown, the light-emitting unit 220 and the cathode 230 are evaporated on the substrate 100 to form a light-emitting device 200 in each first opening of the isolation structure 300. The evaporation in this process does not use a mask plate, so the evaporated material will also be deposited on the second isolation layer 320 and in the second opening; then the protective layer 600 is deposited to cover the light-emitting device 200. The protective layer 600 will cover the entire second display area at this stage. For example, the light-emitting layer 222 in the evaporated light-emitting unit 220 can emit red light (R), that is, at this stage, a light-emitting device 200 (the above-mentioned first light-emitting device) emitting red light is formed in each first opening of the isolation structure 300.

[0127] like Fig. 22 As shown, a photoresist is formed (e.g., coated) on a substrate 100 formed with a protective layer 600, and then a composition process is performed to form a photoresist pattern 700, which only covers a portion of the first opening of the isolation structure 300 (the first opening corresponding to the first light-emitting device after the display panel is prepared).

[0128] like Fig.23 As shown, the surface of the display panel is etched using the photoresist pattern 700 as a mask to remove the protective layer 600, the cathode 230 and the light emitting unit 220 covered by the photoresist pattern 700; and then the remaining photoresist pattern 700 is removed.

[0129] Repeat the above Figure 20 to Figure 23The steps are as follows, so as to form a light emitting device 200 emitting green light and a light emitting device 200 emitting blue light in the other first openings respectively, and form Fig.19 The display panel shown.

[0130] It should be noted that in some embodiments of the present disclosure, some film layers in the light-emitting unit, such as the light-emitting layer, can be prepared by non-evaporation methods such as inkjet printing. The specific method can be selected according to the material of the film layers. For example, when the film layers are made of polymer materials and are not suitable for evaporation, inkjet printing can be used to prepare them.

[0131] For example, in an embodiment of the present disclosure, the display panel may further include an encapsulation layer covering the display function layer, which may isolate the light-emitting device in the display function layer and has a flattening function, so as to facilitate setting functional structures such as a touch function layer, a polarizer, a lens layer, and a cover plate on the encapsulation layer. For example, the encapsulation layer may include a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer sequentially stacked on the display function layer, the first inorganic encapsulation layer and the second inorganic encapsulation layer having high compactness to isolate water, oxygen, etc., the organic encapsulation layer having a large thickness and having a flattening function. For example, in the case where the aforementioned protective layer is provided in the display panel, the protective layer may be independently provided to be located between the first encapsulation layer and the display function layer, or may serve as the first inorganic encapsulation layer.

[0132] At least one embodiment of the present disclosure provides a display device, such as Fig.24 As shown, the display device includes an identification device 20 and a display panel 10 in any of the above embodiments, and the orthographic projection of the identification device 20 on the substrate 100 at least partially overlaps with the first display area 13 .

[0133] For example, in some embodiments of the present disclosure, the identification device 20 includes at least one fingerprint identification sensor. For example, the fingerprint identification sensor may be Fig.24 As shown, the fingerprint recognition sensor is disposed on a side of the substrate 100 that is away from the display function layer. Alternatively, the fingerprint recognition sensor may also be disposed within the substrate.

[0134] For example, in some other embodiments of the present disclosure, the identification device 20 is a camera, and the camera is located on a side of the substrate 100 that is away from the display function layer.

[0135] For example, in the embodiments of the present disclosure, the display device may be any product or component with a display function, such as a television, a digital camera, a mobile phone, a watch, a tablet computer, a laptop computer, a navigator, or the like.

[0136] The above description is only a preferred embodiment of this specification and is not intended to limit this specification. Any modifications, equivalent substitutions, etc. made within the spirit and principles of this specification should be included in the protection scope of this specification.

Claims

1. A display panel, characterized in that: Comprising a first display area, wherein the display panel comprises: substrate; A display function layer, located on the substrate and at least partially located in the first display area, the display function layer comprising a plurality of light emitting devices, each of the light emitting devices having a light emitting unit; and An isolation structure is located on the substrate and encloses a plurality of first openings, wherein each of the first openings is provided with at least one light-emitting device, the isolation structure isolates adjacent light-emitting units, and a portion of the isolation structure located in the first display area is provided with at least one second opening so that the area of ​​the display panel where the second openings are distributed is light-transmissive.

2. The display panel according to claim 1, characterized in that: The light emitting device includes an anode and a cathode stacked on the substrate, the light emitting unit is located between the anode and the cathode, and At least a portion of the isolation structure is a conductive structure, the conductive structure is electrically connected to the cathode of the adjacent light emitting device and is spaced apart from the anode; Preferably, an orthographic projection of one end of the conductive structure facing the substrate on the substrate is located within an orthographic projection of one end of the conductive structure facing away from the substrate on the substrate; Further preferably, the isolation structure comprises a first isolation layer and a second isolation layer stacked together, the first isolation layer is located between the substrate and the second isolation layer, the orthographic projection of the first isolation layer on the substrate is located within the orthographic projection of the second isolation layer on the substrate, and the first isolation layer is the conductive structure; Preferably, the conductive structure is a metal conductive structure.

3. The display panel according to claim 2, characterized in that: The display function layer also includes: a pixel defining layer, located between the isolation structure and the substrate, and comprising a plurality of third openings for defining the light emitting device, the third openings corresponding to the first openings and exposing the anode; The orthographic projection of the isolation structure on the substrate coincides with the orthographic projection of the pixel defining layer on the substrate, or the orthographic projection of the isolation structure on the substrate is within the orthographic projection of the pixel defining layer on the substrate; Preferably, the base includes a substrate and a buffer layer, a gate insulating layer, an interlayer dielectric layer and a planar layer located on the substrate, and at least one of the pixel defining layer, the substrate, the buffer layer, the gate insulating layer, the interlayer dielectric layer and the planar layer is provided with a via, and the via corresponds to the second opening and is connected to each other.

4. The display panel according to any one of claims 1 to 3, characterized in that: The light emitting devices are classified into at least a first light emitting device, a second light emitting device and a third light emitting device, the wavelengths of the emitted lights of the first light emitting device, the second light emitting device and the third light emitting device decrease in sequence, and The second opening is arranged in plurality, and in the first display area, the first light emitting device is arranged adjacent to the second opening; Preferably, along the length direction of the first light emitting device, the first light emitting devices and the corresponding second openings are arranged in sequence; Further preferably, the display panel also includes a second display area, which surrounds at least part of the first display area, and the transmittance of the second display area is less than the transmittance of the first display area, and the length of the first light-emitting device located in the first display area is less than the length of the first light-emitting device located in the second display area.

5. The display panel according to claim 4, characterized in that: In the first display area, all the second openings are arranged adjacent to the first light emitting device. Preferably, in the first display area, the second light emitting device and the third light emitting device are of equal length, and the length of the second light emitting device is greater than that of the first light emitting device. or, In the first display area, all of the second openings are arranged adjacent to the first light emitting device and the second light emitting device; Preferably, along the length direction of the first light emitting device, the first light emitting device and the adjacent second openings are arranged in sequence, and along the length direction of the second light emitting device, the second light emitting device and the adjacent second openings are arranged in sequence; Further preferably, in the first display area, the length of the third light emitting device is greater than the lengths of the first light emitting device and the second light emitting device; Further preferably, the area of ​​the second opening corresponding to the second light emitting device is equal to the area of ​​the second opening corresponding to the first light emitting device; or, the area of ​​the second opening corresponding to the second light emitting device is smaller than the area of ​​the second opening corresponding to the first light emitting device, and further preferably, the length of the second opening corresponding to the second light emitting device is smaller than the length of the second opening corresponding to the first light emitting device; Further preferably, the second openings corresponding to the first light emitting device and the second light emitting device respectively and adjacent to each other are in communication; Further preferably, the display panel further comprises a second display area, the second display area surrounds at least a portion of the first display area, and the light transmittance of the second display area is less than the light transmittance of the first display area, and the length of the second light emitting device located in the first display area is less than the length of the second light emitting device located in the second display area; or, In the first display area, the first light emitting device, the second light emitting device and the third light emitting device are all arranged adjacent to the second opening; Preferably, along the length direction of the second light emitting device, the second light emitting device and the corresponding second opening are arranged in sequence, and / or, along the length direction of the third light emitting device, the third light emitting device and the corresponding second opening are arranged in sequence; Further preferably, an area of ​​the second opening corresponding to the second light-emitting device is smaller than an area of ​​the second opening corresponding to the first light-emitting device, and an area of ​​the second opening corresponding to the third light-emitting device is smaller than an area of ​​the second opening corresponding to the second light-emitting device, so that a length of the second light-emitting device is greater than a length of the first light-emitting device and less than a length of the third light-emitting device, and still further preferably, a length of the second opening corresponding to the third light-emitting device is smaller than a length of the second opening corresponding to the second light-emitting device, and a length of the second opening corresponding to the second light-emitting device is smaller than a length of the second opening corresponding to the first light-emitting device; Further preferably, the second openings corresponding to the first light emitting device, the second light emitting device and the third light emitting device respectively and adjacent to each other are communicated; Further preferably, the display panel also includes a second display area, which surrounds at least part of the first display area, and the transmittance of the second display area is less than the transmittance of the first display area, and the length of the second light-emitting device located in the first display area is less than the length of the second light-emitting device located in the second display area, and the length of the third light-emitting device located in the first display area is less than the length of the third light-emitting device located in the second display area.

6. The display panel according to claim 5, characterized in that: The first light emitting device, the second light emitting device and the third light emitting device are arranged in multiple rows and columns, and The first light emitting device, the second light emitting device and the third light emitting device are located in different columns, and the first light emitting device, the second light emitting device and the third light emitting device are arranged in each row, and preferably, the length direction of the first light emitting device, the second light emitting device and the third light emitting device is the same as the direction of the column; or The first light-emitting device and the second light-emitting device are arranged in a part of the columns, and the third light-emitting device is arranged in another part of the columns. In the columns arranged with the first light-emitting devices, the first light-emitting devices and the second light-emitting devices are arranged alternately along the direction of the columns, and the columns arranged with the first light-emitting devices and the second light-emitting devices are arranged alternately along the direction of the rows with the columns arranged with the third light-emitting devices. Preferably, the length direction of the first light-emitting devices, the second light-emitting devices and the third light-emitting devices is the same as the direction of the columns.

7. The display panel according to claim 4, characterized in that: The first openings correspond to the light emitting devices one by one, so that only one light emitting device is disposed in each of the first openings.

8. The display panel according to any one of claims 1 to 3, characterized in that: The orthographic projection of the second opening on the substrate is in a grid shape, and In the first display area, the mesh of the second opening corresponds to the first opening, and the orthographic projection of the first opening on the substrate is located within the orthographic projection of the corresponding mesh on the substrate; Preferably, at least two light-emitting devices are arranged in each of the first openings, and the light-emitting devices located in the same first opening have the same light emission color.

9. The display panel according to claim 8, characterized in that: Also includes: a transparent conductive layer, located between the isolation structure and the substrate, and connected to the isolation structure; The conductive layer has a fourth opening, the fourth opening corresponds to the first opening, and the orthographic projection of the first opening on the substrate is located within the orthographic projection of the corresponding fourth opening on the substrate, and The orthographic projection of the second opening on the substrate is located within the orthographic projection of the conductive layer on the substrate.

10. A display device, characterized in that: The device comprises an identification device and a display panel as claimed in any one of claims 1 to 9, wherein: The orthographic projection of the identification device on the substrate at least partially overlaps with the first display area; Preferably, the identification device comprises at least one fingerprint identification sensor, and further preferably, the fingerprint identification sensor is located inside the substrate; or Preferably, the identification device is a camera, and the camera is located on a side of the substrate facing away from the display function layer.

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