Display panel and display device

Abstract

The invention provides a display panel and a display device. The display panel includes: a substrate; the auxiliary electrode is located on the substrate, and a first opening is defined by the auxiliary electrode; at least part of the light-emitting device is arranged in the first opening, the light-emitting device comprises a first electrode and a second electrode which are stacked, the first electrode is located between the second electrode and the substrate, the first electrode and the auxiliary electrode are arranged in a spaced mode, and the second electrode and the auxiliary electrode are in lap joint; the problem that the light transmittance of a display area of a display panel in the prior art is low is solved.

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) and flat-panel display devices based on technologies such as Light Emitting Diode (LED) have the advantages of high image quality, power saving, thin body and wide application range, and are widely used in various consumer electronic products such as mobile phones, televisions, laptops, desktop computers, etc., becoming the mainstream in display panels. In the preparation process of traditional display panels, the graphicization of luminous pixels is usually achieved through a fine mask (FMM). FMM technology is mature and has rich experience in mass production. However, FMM technology also has problems such as limited accuracy, high development cost, and long development cycle. Maskless technology eliminates the limitations of traditional OLED processes on display size, resolution and other screen performance, and has the advantages of high performance, full-domain size, and agile delivery. Patents CN118251982A, CN115666161A, CN116648095A, CN117062489A, CN118678742A, CN118785761A, CN115224220A, CN118678729A, CN118660529A, and CN118660589A record relevant contents of the non-fine metal mask technology for reference.

[0003] However, there are still some problems with display panels that need to be solved urgently. Summary of the invention

[0004] In view of this, embodiments of the present disclosure provide a display panel and a display device to solve the problem of low light transmittance of a display area in the related art.

[0005] According to a first aspect of the present disclosure, there is provided a display panel, comprising: a substrate; an auxiliary electrode, which is located on the substrate and encloses a first opening; and a light-emitting device, at least a portion of which is disposed in the first opening, the light-emitting device comprising a stacked first electrode and a second electrode, the first electrode being located between the second electrode and the substrate, the first electrode and the auxiliary electrode being spaced apart, and the second electrode and the auxiliary electrode being overlapped.

[0006] In some embodiments, the auxiliary electrode comprises a light-transmitting conductive material; optionally, the material of the auxiliary electrode comprises indium tin oxide.

[0007] In some embodiments, the display panel further includes a pixel definition layer located on a side of the auxiliary electrode away from the substrate, the pixel definition layer including a pixel definition portion, the pixel definition portion encloses a second opening, the second opening exposes the light-emitting device and a portion of the auxiliary electrode; optionally, the material of the pixel definition portion includes an organic insulating material; optionally, the material of the pixel definition portion includes an organic glue.

[0008] In some embodiments, the pixel definition portion includes a first surface and a second surface arranged opposite to each other, the first surface is located between the auxiliary electrode and the second surface, the orthographic projection of the first surface on the substrate is spaced apart from the orthographic projection of the first electrode on the substrate, and the orthographic projection of the second surface on the substrate is located within the range of the orthographic projection of the first surface on the substrate.

[0009] In some embodiments, the display panel further includes: a pixel definition layer, located on a side of the auxiliary electrode away from the substrate; a partition structure, located on a side of the pixel definition layer away from the substrate, the pixel definition layer includes a pixel definition portion, and the positive projection of the side of the pixel definition portion away from the substrate on the substrate is located within the positive projection range of the partition structure on the substrate, optionally, the transmittance of the partition structure is greater than the transmittance of the pixel definition layer; optionally, the material of the partition structure includes a light-transmitting material; optionally, the material of the partition structure includes an inorganic material; optionally, the material of the partition structure includes an inorganic insulating material; optionally, a light-transmitting area is provided between adjacent light-emitting devices, and in the light-transmitting area, the auxiliary electrode, the pixel definition layer, and the partition structure are stacked in sequence along a direction away from the substrate. ; Optionally, the display panel further comprises a plurality of spaced-apart encapsulation parts, the encapsulation parts being located on a side of the corresponding light-emitting device away from the substrate; optionally, the display panel further comprises a first encapsulation layer being located on a side of the encapsulation part away from the substrate; optionally, the display panel further comprises a second encapsulation layer being located on a side of the first encapsulation layer away from the substrate; optionally, the encapsulation part comprises an inorganic material, the first encapsulation layer comprises an organic material; the second encapsulation layer comprises an inorganic material; optionally, the partition structure comprises a first surface and a second surface which are arranged opposite to each other, the first surface contacts the pixel definition layer, the orthographic projection of the second surface on the substrate is located within the orthographic projection range of the first surface on the substrate, and the orthographic projection of the pixel definition layer on the substrate is located within the orthographic projection range of the first surface on the substrate.

[0010] In some embodiments, the auxiliary electrode encloses a third opening, and the orthographic projection of the third opening on the substrate is located outside the orthographic projection of the first electrode on the substrate; optionally, the display panel also includes an organic layer, the organic layer is located between the auxiliary electrode and the substrate, and the organic layer is located between the first electrode and the substrate; the orthographic projection of the third opening on the substrate overlaps with the orthographic projection of the organic layer on the substrate; optionally, the display panel also includes a pixel definition layer, and the orthographic projection of the third opening on the substrate overlaps with the orthographic projection of the pixel definition layer on the substrate; the third opening and the first opening are arranged at intervals; optionally, the display panel includes a display area, the third opening is located in the display area, and the orthographic projection of the third opening on the substrate is located between the orthographic projections of adjacent light-emitting devices on the substrate; optionally, at least a portion of the surface of the first electrode close to the substrate is flush with at least a portion of the surface of the auxiliary electrode close to the substrate.

[0011] In some embodiments, the light-emitting device further comprises a light-emitting layer located between the first electrode and the second electrode; optionally, the light-emitting layer is spaced apart from the auxiliary electrode; optionally, the second electrode is a cathode of the light-emitting device.

[0012] In some embodiments, there is a spacing region between the first electrode and the auxiliary electrode, the second electrode covers the light-emitting layer and part of the auxiliary electrode, and fills the spacing region; optionally, the transmittance of the auxiliary electrode is greater than the transmittance of the second electrode, and the transmittance of the second electrode is greater than the transmittance of the first electrode.

[0013] In some embodiments, the auxiliary electrode is in a mesh shape, and the mesh holes in the mesh include first openings; optionally, there are multiple light-emitting devices, and the light-emitting devices correspond to the first openings; optionally, the multiple first openings are arranged in an array.

[0014] The second aspect of the present disclosure provides a display device, comprising an optical sensor and the display panel provided by the first aspect above; the optical sensor is located on the side of the display panel away from the light emitting side, and the orthographic projection of the optical sensor on the substrate overlaps with the orthographic projection of the auxiliary electrode on the substrate.

[0015] In the display panel and display device provided by the present disclosure, the auxiliary electrode overlaps with the second electrode; at the same time, the auxiliary electrode is spaced apart from the first electrode, and different electrical signals are transmitted between the two. The auxiliary electrode is used to realize the function of transmitting electrical signals by the undercut structure in the related art, and while ensuring the normal operation of the light-emitting device, the overlapping design of the undercut structure and the first electrode is avoided, and a non-metal opening in the display panel is realized, thereby improving the light transmittance of the display area of ​​the display panel and meeting the light transmittance requirements of the optical sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other purposes, features and advantages of the present disclosure will become more apparent by describing the embodiments of the present disclosure in more detail in conjunction with the accompanying drawings. The accompanying drawings are used to provide a further understanding of the embodiments of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the present disclosure and do not constitute a limitation of the present disclosure. In the drawings, the same reference numerals generally represent the same components or structures.

[0017] Figure 1 Shown is a schematic diagram of the cross-sectional structure of a display panel in the related art.

[0018] Figure 2 Shown is a schematic top view of a display panel provided in accordance with an embodiment of the present disclosure.

[0019] Figure 3 Shown Figure 2 The illustrated embodiment is a schematic diagram of the cross-sectional structure of a display panel in area B.

[0020] Figure 4 Shown is a schematic cross-sectional structure diagram of a display panel provided in another embodiment of the present disclosure.

[0021] Figure 5 Shown is a schematic cross-sectional structure diagram of a display panel provided in yet another embodiment of the present disclosure.

[0022] Figure 6 Shown Figure 4 The illustrated embodiment is an enlarged schematic diagram of a display panel in area C.

[0023] Figure 7 Shown Figure 3 The illustrated embodiment provides a schematic top view of a portion of film layers in a display panel.

[0024] Figure 8 Shown is a schematic cross-sectional structure diagram of a display panel provided in yet another embodiment of the present disclosure.

[0025] Fig. 9 Shown is a schematic cross-sectional structure diagram of a display panel provided in yet another embodiment of the present disclosure.

[0026] Fig.10 Shown Figure 8 The illustrated embodiment provides a schematic top view of a portion of film layers in a display panel. DETAILED DESCRIPTION

[0027] 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.

[0028] In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the inventive product is usually placed when in use, which are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] Figure 1 FIG. 1 is a schematic diagram of the structure of a display panel in the related art. Figure 1 As shown, in the display area of ​​the display panel, the display panel includes a substrate and a plurality of light-emitting devices located on one side of the substrate. In the preparation process of the light-emitting device, the first electrode 120 and the pixel definition layer 130 are first made on one side of the substrate 110, and the undercut structure 140 is made thereon, and finally, the light-emitting layer, the second electrode and other film structures are made in the opening formed by the pixel definition layer 130 and the undercut structure 140, and the patterning is realized by photolithography technology to realize the preparation of the light-emitting device. Among them, the undercut structure 140 is usually made of a metal material, such as aluminum (Al), titanium (Ti), etc., to transmit electrical signals (for example, ELVSS). However, the first electrode 120 is usually made of a metal material with low light transmittance, and the overlapping design of the undercut structure 140 and the first electrode 120 will result in a low overall light transmittance of the display area, and it is difficult for external light to pass through the display panel into the optical sensor below, and the optical sensor cannot be used.

[0030] In view of this, the present disclosure provides a display panel, including: a substrate; an auxiliary electrode, located on the substrate, the auxiliary electrode enclosing a first opening; a light-emitting device, at least a portion of the light-emitting device is arranged in the first opening, the light-emitting device includes a stacked first electrode and a second electrode, the first electrode is located between the second electrode and the substrate, the first electrode and the auxiliary electrode are arranged at intervals, and the second electrode and the auxiliary electrode are overlapped.

[0031] Through the above arrangement, the overlapping design of the undercut structure and the first electrode can be avoided, and while realizing the light-emitting device, the non-metal opening of the display panel is ensured, the transmittance is improved, and the transmittance requirement of the optical sensor is met.

[0032] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0033] Figure 2 FIG. 1 is a schematic top view of a display panel provided by an embodiment of the present disclosure. Figure 2 As shown, the display panel includes a display area AA and a non-display area NA. A plurality of light emitting devices for displaying images are arranged in the display area AA. The non-display area NA may be located at least on one side of the display area AA.

[0034] Figure 3 Shown Figure 2 The structure diagram of the display panel in area B provided by the embodiment shown is as follows. Figure 3 As shown, the display panel includes a substrate 310, an auxiliary electrode 320 and a light emitting device 330. The auxiliary electrode 320 is located on the substrate 310 and encloses a first opening 321. The first opening 321 exposes a portion of the substrate 310, and at least a portion of the light emitting device 330 is disposed in the first opening 321.

[0035] The substrate 310 may be a flexible substrate or a rigid substrate. Accordingly, the display panel in the embodiment of the present disclosure may be a bendable flexible display panel or a non-bendable rigid display panel. Exemplarily, the substrate 310 includes a substrate and a driving circuit layer located on the substrate, and the driving circuit layer includes a plurality of pixel driving circuits. For example, the pixel driving circuit may include a plurality of transistors TFT, capacitors, etc., and the pixel driving circuit is connected to the light emitting device 330 to control the switching state and the light emitting brightness of the light emitting device 330. In addition, the substrate 310 may also include a buffer layer, an insulating layer, a flat layer, etc., and the present disclosure does not specifically limit this.

[0036] The light emitting device 330 includes a first electrode 331 and a second electrode 332 stacked together, wherein the first electrode 331 is located between the second electrode 332 and the substrate 310. The first electrode 331 is disposed at the first opening 321, and the first opening 321 exposes a side of the first electrode 331 away from the substrate 310, and the second electrode 332 is located at a side of the first electrode 331 away from the substrate 310.

[0037] The first electrode 331 and the auxiliary electrode 320 are arranged at intervals, and the first electrode 331 and the auxiliary electrode 320 are not overlapped, and the first electrode 331 and the auxiliary electrode 320 transmit different electrical signals respectively. The second electrode 332 and the auxiliary electrode 320 overlap (that is, electrically connected or electrically contacted) to achieve an electrical connection relationship between the second electrode 332 and the auxiliary electrode 320. For example, at least a portion of the first electrode 331 and the auxiliary electrode 320 can be arranged in the same layer. For example, a light-transmitting area is provided between adjacent light-emitting devices 330, and at least a portion of the auxiliary electrode 320 is located in the light-transmitting area.

[0038] In the disclosed embodiment, the auxiliary electrode overlaps the second electrode; at the same time, the auxiliary electrode is spaced apart from the first electrode, and different electrical signals are transmitted between the two. The auxiliary electrode is used to realize the function of transmitting electrical signals by the undercut structure in the related art, and while ensuring the normal operation of the light-emitting device, the overlapping design of the undercut structure and the first electrode is avoided, and a non-metal opening in the display panel is realized, thereby improving the light transmittance of the display area of ​​the display panel and meeting the light transmittance requirements of the optical sensor.

[0039] In some embodiments, the auxiliary electrode 320 includes a light-transmitting conductive material, that is, the auxiliary electrode 320 is made of a conductive material with high light transmittance. The auxiliary electrode 320 is disposed around the first electrode 331. Figure 3 In the cross section shown, the auxiliary electrode 320 and the first electrode 331 are arranged alternately and spaced apart in a direction parallel to the display panel. After the auxiliary electrode 320 is set as a transparent electrode with high light transmittance, external light can easily pass through the display panel through the transparent electrode, thereby increasing the area of ​​the light-transmitting region without affecting the display performance.

[0040] By way of example, the material of the auxiliary electrode 320 includes indium tin oxide (ITO), which is a stable, highly conductive, transparent material with a light transmittance of nearly 90% in the visible light range.

[0041] Continue to refer Figure 3 The display panel further includes a pixel definition layer. The pixel definition layer is located on a side of the auxiliary electrode 320 away from the substrate 310. The pixel definition layer includes a pixel definition portion 341. The pixel definition layer can define and limit the shape and size of the pixel, ensure isolation between pixels, and prevent crosstalk.

[0042] For example, the pixel definition layer may include an insulating material. Optionally, the material of the pixel definition portion 341 includes an organic insulating material. Exemplarily, the material of the pixel definition portion 341 includes an organic glue. The organic glue material is easy to form a structure that meets the thickness requirements of the pixel definition portion 341, and the process is simple and easy to implement.

[0043] In other embodiments, the pixel defining portion 341 may include an inorganic insulating material.

[0044] For example, the pixel definition layer may include a light-transmitting material.

[0045] For example, the pixel definition portion 341 encloses a second opening 341, and the second opening 341 exposes the light emitting device 330 and a portion of the auxiliary electrode 320. The second electrode 332 of the light emitting device 330 contacts the auxiliary electrode 320 exposed by the second opening 341 to achieve electrical connection.

[0046] For example, the orthographic projection of the first opening 321 on the substrate 310 is located within the orthographic projection range of the second opening 341 on the substrate 310. While realizing the function of the pixel definition layer, the light-transmitting area of ​​the display panel is ensured.

[0047] In some embodiments, the pixel definition portion 341 includes a first surface 342 and a second surface 343 that are arranged opposite to each other. The first surface 342 of the pixel definition portion 341 is located between the auxiliary electrode 320 and the second surface 343, and the orthographic projection of the first surface 342 on the substrate 310 is spaced from the orthographic projection of the first electrode 331 on the substrate 310. For example, the orthographic projection of the second surface 343 of the pixel definition portion 341 on the substrate 310 is located within the orthographic projection range of the first surface 342 on the substrate 310.

[0048] Continue to refer Figure 3 , the second electrode 332 of the light emitting device 330 covers the part of the auxiliary electrode 320 exposed by the second opening 341, and overlaps with the side wall of the pixel definition part 341. Through the above arrangement, the side wall of the pixel definition part 341 is sloped. In the process of preparing the second electrode 332 in the second opening 341 of the pixel definition part 341 by the evaporation method, the sloped side wall of the pixel definition layer is easier for the evaporation material of the second electrode 332 to climb, thereby improving the stability of the structure and reducing the risk of fracture.

[0049] Figure 4 FIG. 2 is a schematic diagram of the structure of a display panel provided by another embodiment of the present disclosure. Figure 4 As shown, the display panel further includes a partition structure 350. The partition structure 350 is located on the side of the pixel definition layer away from the substrate 310. More specifically, the partition structure 350 is superimposed on the second surface of the pixel definition portion 341. The orthographic projection of the side of the pixel definition portion 341 away from the substrate 310 on the substrate 310 is located within the orthographic projection range of the partition structure 350 on the substrate 310. The pixel definition portion 341 and the partition structure 350 together form an undercut structure. For example, the cross section perpendicular to the substrate obtained by splicing the pixel definition portion 341 and the partition structure 350 may be T-shaped or inverted trapezoidal. For example, the cross section perpendicular to the substrate obtained by splicing the auxiliary electrode 320, the pixel definition portion 341 and the partition structure 350 may be I-shaped.

[0050] For example, the cross section of the pixel definition portion 341 perpendicular to the substrate may be an inverted trapezoid, a regular trapezoid or a rectangle. For example, the orthographic projection area of ​​the side of the pixel definition portion 341 away from the substrate on the substrate is greater than, less than or equal to the orthographic projection area of ​​the side of the pixel definition portion 341 close to the substrate on the substrate.

[0051] In the process of preparing the film layer in the second opening, the edge of the partition structure 350 can partition the film layer formed by evaporation, so that the film layer is completely located in the second opening. In this way, in the preparation process, there is no need to use a fine metal mask for alignment, and the forming position of the film layer can be accurately controlled, simplifying the preparation process and improving the preparation efficiency.

[0052] Continue to refer Figure 4 In order to realize the partitioning effect of the partitioning structure 350 on the evaporated film layer, the edge of the partitioning structure 350 extends into the second opening, and from the direction perpendicular to the substrate, the partitioning structure 350 shields at least a portion of the auxiliary electrode 320 and / or the substrate 310 exposed by the second opening. Therefore, the partitioning structure 350 can be prepared using a material with a high light transmittance, so that the light transmittance of the partitioning structure 350 is greater than the light transmittance of the pixel definition portion 341, so as to avoid the partitioning structure 350 blocking the light-transmitting area of ​​the display panel.

[0053] Optionally, the partition structure 350 is made of a light-transmitting material. The partition structure 350 is made of a light-transmitting material so that external light can pass through the partition structure 350, thereby ensuring the light-transmitting area of ​​the display panel.

[0054] For example, when the partition structure 350 and the auxiliary electrode 320 are both made of light-transmitting materials, the light transmittance of the area in the second opening except the first electrode can be guaranteed, and while realizing the display function, the area of ​​the light-transmitting area can be maximized, thereby meeting the light transmittance requirements of the optical sensor.

[0055] Optionally, the material of the partition structure 350 includes inorganic materials, such as silicon nitride, silicon oxide and the like. The partition structure 350 and the pixel definition layer 340 are made of different materials, namely inorganic materials and organic materials respectively, and the etchants used by the two are different, so it is easier to form an undercut structure and simplify the preparation process. At the same time, such materials have the characteristics of dense insulation, which can improve the reliability of the structure.

[0056] In other embodiments, the partition structure 350 may include a conductive material, such as a light-transmitting conductive material.

[0057] Optionally, the material of the partition structure 350 includes an inorganic insulating material to avoid leakage or short circuit failures and ensure the electrical safety and structural stability of the display panel.

[0058] Exemplarily, the material of the auxiliary electrode 320 is indium tin oxide (ITO), the material of the pixel definition layer 340 is an organic glue material, and the material of the partition structure 350 is an inorganic material. In the process of preparing the three-layer structure consisting of the auxiliary electrode 320, the pixel definition layer 340, and the partition structure 350, firstly, a stacked ITO layer, an organic glue layer, and a passivation layer are made on the substrate, and the three-layer structure is patterned to form an undercut structure. At the same time, the selected materials have good performance, which is conducive to realizing the non-metal opening of the display panel to meet the transmittance requirements of the optical sensor.

[0059] Exemplarily, the patterning process may be a photolithography patterning process. In the photolithography process, one mask plate may be used to perform photolithography on the three-layer structure to simplify the process and improve the manufacturing efficiency.

[0060] Continue to refer Figure 4 , the partition structure 350 includes a first surface 351 and a second surface 352 that are arranged opposite to each other. The first surface 351 of the partition structure 350 contacts the pixel definition layer 340, and the orthographic projection of the pixel definition layer 340 on the substrate is located within the orthographic projection range of the first surface 351 on the substrate. The orthographic projection of the second surface 352 on the substrate is located within the orthographic projection range of the first surface 351 on the substrate. Through the above arrangement, the side wall of the partition structure 350 is sloped, and the edge formed by the part of the side wall close to the first surface 351 and the first surface 351 extends into the second opening of the pixel definition layer 340. In the process of preparing the film layer structure in the second opening, a precise material evaporation angle can be achieved, and the partition effect of the partition structure can be improved.

[0061] In addition to the structure described above, a packaging structure may be further provided above the light emitting device to block water vapor, oxygen, etc. from invading the light emitting device, thereby increasing the service life of the display panel.

[0062] Figure 5 FIG. 2 is a schematic diagram of the structure of a display panel provided by another embodiment of the present disclosure. Figure 5 As shown, in addition to the film structure described in the above embodiment, the display panel also includes a plurality of encapsulation parts 510, for example, the plurality of encapsulation parts 510 are arranged at intervals, and the encapsulation parts 510 are located on the side of the corresponding light-emitting device away from the substrate. At least part of the encapsulation part 510 extends from the second opening enclosed by the pixel definition part along the side wall of the pixel definition part to the side surface of the partition structure away from the substrate (i.e., the second surface of the partition structure in the above embodiment). For example, light-emitting devices of different luminous colors correspond to different encapsulation parts 510.

[0063] Optionally, the display panel further includes a first encapsulation layer 520 located on a side of the encapsulation part 510 away from the substrate. Optionally, the display panel further includes a second encapsulation layer 530 located on a side of the first encapsulation layer 520 away from the substrate. The encapsulation part 510, the first encapsulation layer 520 and the second encapsulation layer 530 are stacked.

[0064] The encapsulation part 510, the first encapsulation layer 520 and the second encapsulation layer 530 can have an encapsulation effect on the film layer below. Specifically, the encapsulation part 510 and the second encapsulation layer 530 have high density and can isolate the external water vapor, oxygen and the like from invading the film layer below. The first encapsulation layer 520 has a large thickness and can flatten the surface of the display panel, so as to facilitate the arrangement of structures such as touch function structures, optical films, cover plates and the like on the light-emitting side of the display panel.

[0065] Optionally, the encapsulation portion 510 includes an inorganic material, and / or the first encapsulation layer 520 includes an organic material, and / or the second encapsulation layer 530 includes an inorganic material. The three together form an inorganic / organic / inorganic three-layer encapsulation structure. This structure has an extremely high barrier effect on gases such as water vapor and oxygen, so it can effectively protect the light-emitting devices and other structures covered by it, further improving the service life of the display panel. Exemplarily, the encapsulation portion 510 and the second encapsulation layer 530 can be formed by chemical vapor deposition (CVD), and the first encapsulation layer 520 can be formed by inkjet printing.

[0066] The specific structure of the light emitting device will be further described below in conjunction with the accompanying drawings.

[0067] Figure 6 Shown Figure 4 The embodiment shown is an enlarged schematic diagram of the display panel in area C. Figure 6 As shown, the light emitting device 330 further includes a light emitting layer 333. The light emitting layer 333 is located between the first electrode 331 and the second electrode 332.

[0068] The light-emitting layer 333 may include a material having electroluminescence (EL) properties. The first electrode 331 and the second electrode 332 are the anode and cathode of the light-emitting device 330, respectively. Exemplarily, the first electrode 331 is set as an anode, and correspondingly, the second electrode 332 is set as a cathode. Alternatively, the first electrode 331 is set as a cathode, and correspondingly, the second electrode 332 is set as an anode, which is not specifically limited in the present disclosure. When voltages are applied to the first electrode 331 and the second electrode 332, respectively, the light-emitting layer 333 emits light to achieve a display function. Specifically, the anode can provide holes to the light-emitting layer 333, and the cathode can provide electrons to the light-emitting layer 333. The holes provided by the anode and the electrons provided by the cathode recombine in the light-emitting layer 333 to excite the light-emitting material of the light-emitting layer to emit light.

[0069] Exemplarily, the first electrode 331 is the anode of the light-emitting device 330, the second electrode 332 is the cathode of the light-emitting device 330, and the auxiliary electrode 320 electrically connected to the second electrode 332 is configured to transmit a negative power signal (ELVSS). At this time, the auxiliary electrode 320 can serve as an auxiliary cathode of the light-emitting device 330. The auxiliary electrode 320 and the second electrode 332 transmit the power signal ELVSS together.

[0070] Optional, such as Figure 6 As shown, the light emitting layer 333 and the auxiliary electrode 320 are spaced apart to reduce the lateral leakage current between adjacent light emitting devices.

[0071] Compared to Figure 1 The display panel in the related art shown in the embodiment of the present disclosure transmits the power signal to the light-emitting device through the auxiliary electrode, replacing part of the function of the bottom cut structure in the related art. Therefore, part of the film layer structure setting in the display panel can be appropriately adjusted to form a light-transmitting area F.

[0072] For example, in the light-transmitting region F, the auxiliary electrode 320 , the pixel definition layer, and the partition structure 350 are stacked in sequence in a direction away from the substrate.

[0073] Continue to refer Figure 6 , the second electrode 332 covers the light emitting layer 333 and part of the auxiliary electrode 320, and the electrical connection with the auxiliary electrode 320 is achieved through the overlapping portion of the second electrode 332 and the auxiliary electrode 320. There is a spacing area between the first electrode 331 and the auxiliary electrode 320, and the second electrode 332 fills and / or covers the spacing area. Optionally, the transmittance of the auxiliary electrode is greater than the transmittance of the second electrode, and the transmittance of the second electrode is greater than the transmittance of the first electrode.

[0074] The first electrode 331 is spaced apart from the auxiliary electrode 320 to ensure the correct flow of current in the light-emitting device and avoid short circuits or other electrical problems. The second electrode 332 fills the spaced apart area, which can reduce the impact of mechanical stress on the light-emitting device, reduce the risk of the second electrode 332 breaking, and improve the stability of the overall structure.

[0075] In the second opening formed by the pixel definition portion, the second electrode 332 completely covers the film layer below and overlaps the side wall of the pixel definition layer. Therefore, the second electrode 332 can also provide a certain degree of protection for the film layer below.

[0076] In addition to the film structure described in the above embodiment, the light-emitting device may also include a hole injection layer, a hole transport layer, an electron blocking layer, and an electron injection layer, an electron transport layer, a hole blocking layer and other structures, which may be specifically designed according to actual needs, and the present disclosure does not impose specific restrictions on this. The hole injection layer and the hole transport layer may be made of a material with high hole mobility, so that the holes generated by the anode are better transferred to the light-emitting layer. Similarly, the electron injection layer and the electron transport layer may be made of a material with high electron mobility, so that the electrons generated by the cathode are better transferred to the light-emitting layer.

[0077] In addition to the film layer structure described in the above embodiments, the display panel may further include other film layer structures, which may be specifically designed according to actual needs, and the present disclosure does not impose any specific restrictions on this.

[0078] Figure 7 Shown Figure 3 The embodiment shown is a schematic top view of a portion of the film layer in the display panel. Figure 7 As shown, the auxiliary electrode 320 is located in the display area of ​​the display panel, and the auxiliary electrode 320 encloses a plurality of first openings, so that the plane shape of the auxiliary electrode 320 is a mesh structure as a whole, and the mesh in the mesh includes the first opening. There are multiple light-emitting devices 330, and the light-emitting devices 330 correspond to the first openings (for example, one-to-one correspondence), and the light-emitting devices 330 are all arranged in the corresponding first openings, and the second electrodes of the light-emitting devices 330 overlap with the mesh auxiliary electrode 320 to form a planar common electrode. In this way, the edges of adjacent first openings are co-edges, so as to reduce the gap between adjacent light-emitting devices 330, which is conducive to improving the pixel arrangement density (PPI) of the display area and improving the display performance of the display panel.

[0079] Understandably, Figure 7 The shape of the first opening shown is only schematic, and the shape of the first opening or the light-emitting device can be designed according to actual needs. Exemplarily, the shape of the first opening can include regular shapes such as rectangles and circles, and can also be designed as other irregular shapes. Moreover, the shapes of multiple first openings can be the same, or partially different. In addition, the number of first openings in the auxiliary electrode can also be set according to actual needs, and the present disclosure does not impose specific restrictions on the shape and number of the first openings. According to the setting of the shape and number of the first openings, the arrangement of multiple first openings can also be designed accordingly. Exemplarily, multiple first openings are arranged in an array, and the auxiliary electrode is in a mesh shape (i.e., a grid shape), and accordingly, multiple light-emitting devices are arranged in an array.

[0080] Figure 8 FIG. 2 is a schematic diagram of a cross-sectional structure of a display panel provided in yet another embodiment of the present disclosure. Figure 8As shown, in addition to the first opening described in the above embodiment, the auxiliary electrode 320 encloses a third opening 322, and the orthographic projection of the third opening 322 on the substrate 310 is located outside the orthographic projection of the first electrode 331 on the substrate 310. The orthographic projection of the third opening 322 on the substrate 310 does not overlap with the orthographic projection of the first electrode 331 on the substrate 310, that is, they are staggered.

[0081] During the preparation of the display panel, the film layer below the auxiliary electrode 320 will release water vapor during the medium and high temperature process. At this time, the water vapor released by the film layer below the auxiliary electrode 320 can be released through the third opening 322, thereby avoiding bulging between the auxiliary electrode 320 and the film layer below, thereby avoiding peeling of the auxiliary electrode 320 and the film layer below, and improving the structural stability of the display panel.

[0082] Optionally, the display panel further includes an organic layer 810, and the organic layer 810 is located between the auxiliary electrode 320 and the substrate 310. Since the first electrode 331 and the auxiliary electrode 320 are arranged in the same layer, the organic layer 810 is located between the first electrode 331 and the substrate 310. The orthographic projection of the third opening 322 on the substrate overlaps with the orthographic projection of the organic layer 810 on the substrate 310, that is, the water vapor released by the organic layer 810 during the high temperature process can be released through the third opening 322. Exemplarily, the organic layer 810 can be a planarization layer. The organic layer 810 can be an organic insulating layer. For example, at least a portion of the surface of the first electrode 331 close to the substrate is flush with at least a portion of the surface of the auxiliary electrode 320 close to the substrate, which is equivalent to the first electrode 331 and the auxiliary electrode 320 being arranged in the same layer.

[0083] Optionally, the display panel further includes a pixel definition layer. The orthographic projection of the third opening 322 on the substrate 310 overlaps with the orthographic projection of the pixel definition layer on the substrate 310, and the third opening 322 and the first opening 321 are arranged at intervals. In this way, the first opening 321 and the third opening 322 are arranged alternately, so that the water vapor released by the film layer below the auxiliary electrode 320 can be uniformly released through the first opening 321 and the third opening 322. Specifically, the pixel definition layer includes a pixel definition portion 341, and the orthographic projection of the third opening 322 on the substrate 310 is located within the orthographic projection of the pixel definition portion 341 on the substrate 310.

[0084] For example, the first openings 321 and the third openings 322 are arranged alternately along the first direction, and / or the first openings 321 and the third openings 322 are arranged alternately along the second direction. The first direction intersects with the second direction, for example, perpendicularly.

[0085] Fig. 9 Shown Figure 8 The embodiment shown is a schematic top view of a portion of the film layer in the display panel. Fig. 9As shown, the display panel includes a display area, the third opening 322 is located in the display area, and the orthographic projection of the third opening 322 on the substrate is located between the orthographic projections of adjacent light-emitting devices 330 on the substrate. The third opening 322 can be located in the light-transmitting area. By setting the third opening 322, the light transmittance of the light-transmitting area can be improved.

[0086] For example, a plurality of third openings 322 are arranged in an array. For example, the size of the third opening 322 is smaller than, larger than, or equal to the size of the first opening 321. For example, the third opening 322 is provided on at least one side (one side, two sides, three sides, or four sides) of the same first opening 321.

[0087] Based on the same inventive concept, the present disclosure further provides a display device, including the display panel provided by the above embodiment of the present disclosure. It should be understood that the principle of solving the problem in the display device embodiment is similar to that in the above display panel embodiment. Therefore, the implementation of this embodiment can refer to the implementation of the above display panel embodiment, and the repeated parts will not be repeated.

[0088] The display device may also include an optical sensor, which is located on the side of the display panel away from the light-emitting side, and the orthographic projection of the optical sensor on the substrate overlaps with the orthographic projection of the light-transmitting area and / or the auxiliary electrode on the substrate. External light enters the optical sensor through the light-transmitting area and / or the auxiliary electrode of the display panel to realize functions such as under-screen camera, under-screen optical fingerprint recognition, and automatic screen brightness adjustment. At least part of the auxiliary electrode is located in the light-transmitting area.

[0089] In the embodiments of the present disclosure, the display device may include a mobile phone, a tablet computer, a smart wearable device, a television, a laptop computer, a monitor, etc. The present disclosure does not specifically limit the specific form of the display device.

[0090] Since the principle of solving the problem in the display device embodiment is similar to that in the above-mentioned display panel embodiment, the implementation of the display device embodiment may refer to the implementation of the above-mentioned display panel embodiment, and the repeated parts will not be repeated.

[0091] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A display panel, characterized in that: include: substrate; An auxiliary electrode is located on the substrate, and the auxiliary electrode surrounds and forms a first opening; A light-emitting device, at least a portion of which is disposed in the first opening, the light-emitting device comprising a first electrode and a second electrode stacked together, the first electrode being located between the second electrode and the substrate, the first electrode and the auxiliary electrode being spaced apart, and the second electrode and the auxiliary electrode being overlapped.

2. The display panel according to claim 1, characterized in that: The auxiliary electrode comprises a light-transmitting conductive material; Preferably, the material of the auxiliary electrode includes indium tin oxide.

3. The display panel according to claim 1, characterized in that: It also includes a pixel definition layer, which is located on a side of the auxiliary electrode away from the substrate, the pixel definition layer includes a pixel definition portion, the pixel definition portion encloses to form a second opening, and the second opening exposes the light emitting device and a portion of the auxiliary electrode; Preferably, the material of the pixel definition portion includes an organic insulating material; Preferably, the material of the pixel definition portion includes organic glue.

4. The display panel according to claim 3, characterized in that: The pixel definition portion includes a first surface and a second surface arranged opposite to each other, the first surface is located between the auxiliary electrode and the second surface, the orthographic projection of the first surface on the substrate is arranged at an interval with the orthographic projection of the first electrode on the substrate, and the orthographic projection of the second surface on the substrate is located within the orthographic projection range of the first surface on the substrate.

5. The display panel according to claim 1, characterized in that: Also includes: A pixel definition layer, located on a side of the auxiliary electrode away from the substrate; a partition structure, located on a side of the pixel definition layer away from the substrate, the pixel definition layer comprising a pixel definition portion, an orthographic projection of a side of the pixel definition portion away from the substrate on the substrate being within a range of an orthographic projection of the partition structure on the substrate; Preferably, the light transmittance of the partition structure is greater than the light transmittance of the pixel definition layer; Preferably, the material of the partition structure includes a light-transmitting material; Preferably, the material of the partition structure includes an inorganic material; Preferably, the material of the partition structure includes an inorganic insulating material; Preferably, a light-transmitting region is provided between adjacent light-emitting devices, and in the light-transmitting region, the auxiliary electrode, the pixel definition layer, and the partition structure are sequentially stacked in a direction away from the substrate; Preferably, the display panel further comprises a plurality of packaging parts arranged at intervals, wherein the packaging parts are located on a side of the corresponding light-emitting device away from the substrate; Preferably, the display panel further comprises a first encapsulation layer located on a side of the encapsulation portion away from the substrate; Preferably, the display panel further comprises a second encapsulation layer located on a side of the first encapsulation layer away from the substrate; Preferably, the encapsulation portion comprises an inorganic material, the first encapsulation layer comprises an organic material, and the second encapsulation layer comprises an inorganic material; Preferably, the partition structure includes a first surface and a second surface arranged opposite to each other, the first surface is in contact with the pixel definition layer, the orthographic projection of the second surface on the substrate is located within the orthographic projection range of the first surface on the substrate, and the orthographic projection of the pixel definition layer on the substrate is located within the orthographic projection range of the first surface on the substrate.

6. The display panel according to claim 1, characterized in that: The auxiliary electrodes enclose a third opening, and the orthographic projection of the third opening on the substrate is located outside the orthographic projection of the first electrode on the substrate; Preferably, the display panel further comprises an organic layer, the organic layer is located between the auxiliary electrode and the substrate, and the organic layer is located between the first electrode and the substrate; the orthographic projection of the third opening on the substrate overlaps with the orthographic projection of the organic layer on the substrate; Preferably, the display panel further comprises a pixel definition layer, and the orthographic projection of the third opening on the substrate overlaps with the orthographic projection of the pixel definition layer on the substrate; the third opening and the first opening are arranged at intervals; Preferably, the display panel comprises a display area, the third opening is located in the display area, and the orthographic projection of the third opening on the substrate is located between the orthographic projections of adjacent light emitting devices on the substrate; Preferably, at least a portion of a surface of the first electrode close to the substrate is flush with at least a portion of a surface of the auxiliary electrode close to the substrate.

7. The display panel according to claim 1, characterized in that: The light emitting device further comprises a light emitting layer located between the first electrode and the second electrode; Preferably, the light-emitting layer and the auxiliary electrode are spaced apart from each other; Preferably, the second electrode is a cathode of the light emitting device.

8. The display panel according to claim 7, characterized in that: There is a spacing region between the first electrode and the auxiliary electrode, and the second electrode covers the light-emitting layer and a portion of the auxiliary electrode and fills the spacing region; Preferably, the light transmittance of the auxiliary electrode is greater than that of the second electrode, and the light transmittance of the second electrode is greater than that of the first electrode.

9. The display panel according to claim 1, characterized in that: The auxiliary electrode is in a mesh shape, and the mesh holes in the mesh include the first opening; Preferably, there are multiple light emitting devices, and the light emitting devices correspond to the first openings; Preferably, a plurality of the first openings are arranged in an array.

10. A display device, characterized in that: It comprises an optical sensor and the display panel according to any one of claims 1 to 9; the optical sensor is located on the side of the display panel away from the light emitting side, and the orthographic projection of the optical sensor on the substrate overlaps with the orthographic projection of the auxiliary electrode on the substrate.

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