Display panel, display device, and method for manufacturing display panel

Abstract

This application discloses a display panel, a display device, and a method for fabricating the display panel. The display panel includes: a substrate; a first electrode layer located on the substrate, the first electrode layer including a first electrode; a pixel defining layer located on the side of the first electrode layer facing away from the substrate, the pixel defining layer including an isolation portion and a first opening formed by the isolation portion, the first electrode being at least partially exposed through the first opening; and a second electrode layer, at least a portion of the second electrode layer located on the side of the pixel defining layer facing away from the substrate, the second electrode layer including a body portion and a cutout portion penetrating the body portion, the cutout portion and the orthographic projection of the first electrode on the substrate not overlapping. During the fabrication process of the display panel of this application, the first electrode of the first electrode layer can be used as a mask to form the cutout portion on the second electrode layer, thereby improving the light transmittance of the display panel.

Description

TECHNICAL FIELD

[0001] The present application relates to the display field, and in particular to a display panel, a display device and a preparation method of the display panel. BACKGROUND

[0002] With the rapid development of electronic devices, users have higher and higher requirements for screen ratio, so that the full-screen display of electronic devices has attracted more and more attention in the industry.

[0003] Traditional electronic devices such as mobile phones and tablet computers need to integrate front cameras, receivers and infrared sensing elements. In the prior art, a slot (Notch) or a hole can be formed on the display screen, so that external light can enter the light sensing element located below the screen through the slot or the hole on the screen. However, these electronic devices are not true full-screen devices, and cannot display in all areas of the screen, for example, the front camera area cannot display pictures. SUMMARY

[0004] The embodiments of the present application provide a display panel, a display device and a preparation method of the display panel, which realize that at least part of the display panel is transparent and displayable, and facilitate the under-screen integration of the light sensing component.

[0005] The first aspect of the present application provides a display panel, comprising: a substrate; a first electrode layer located on the substrate, the first electrode layer comprising a first electrode; a pixel definition layer located on a side of the first electrode layer away from the substrate, the pixel definition layer comprising an isolation portion and a first opening formed by the isolation portion, the first electrode being at least partially exposed by the first opening; and a second electrode layer, at least part of the second electrode layer being located on a side of the pixel definition layer away from the substrate, the second electrode layer comprising a body portion and a hollow portion penetrating the body portion, the hollow portion and the first electrode being arranged without overlapping in a projection of the substrate.

[0006] According to the embodiments of the first aspect of the present application, the pixel definition layer further comprises a second opening penetrating the pixel definition layer, and a projection of the hollow portion on the substrate is located within a projection of the second opening on the substrate. The distance between the second electrode layer and the first electrode layer can be further reduced.

[0007] According to any one of the preceding embodiments of the first aspect of the present application, at least part of the edges of the projection of the first electrode on the substrate is located within the projection of the second opening on the substrate. The edges of the body portion are close to the first electrode, which better improves the problem of the edges of the body portion turning up towards the hollow portion.

[0008] According to any one of the foregoing embodiments of the first aspect of the present application, the first electrode layer further comprises a second electrode, the second electrode and the first electrode are not overlapped in the orthographic projection of the first electrode layer on the substrate, and at least part of the edge of the orthographic projection of the second electrode on the substrate is located within the orthographic projection of the second opening on the substrate. By arranging the second electrode, the first electrode layer can better play the role of a mask in the process of forming the hollow part by laser ashing the second electrode layer without affecting the normal operation of the first electrode.

[0009] According to any one of the foregoing embodiments of the first aspect of the present application, the maximum distance between the second electrode and the body part in the thickness direction of the display panel is less than or equal to 0.8 μm. The close distance between the first electrode layer and the second electrode layer can avoid the body part folding towards the edge of the hollow part due to laser diffraction, thereby affecting the packaging effect of the subsequent packaging process.

[0010] According to any one of the foregoing embodiments of the first aspect of the present application, a gap exists between the first electrode and the second electrode. Avoiding the short circuit connection of the first electrode through the second electrode and the body part of the second electrode layer due to the mutual connection of the second electrode and the body part of the second electrode layer can further improve the yield of the display panel.

[0011] According to any one of the foregoing embodiments of the first aspect of the present application, the first electrode and the second electrode are arranged one-to-one, and each second electrode is arranged around each first electrode to form a ring-shaped gap on the side of each first electrode. A specific implementation is provided.

[0012] According to any one of the foregoing embodiments of the first aspect of the present application, the width of the gap is 0.5 μm to 10 μm.

[0013] According to any one of the foregoing embodiments of the first aspect of the present application, the isolation part and the first electrode are arranged one-to-one, and the isolation part is ring-shaped, and the orthographic projection of each gap on the substrate is located within the orthographic projection of each isolation part on the substrate. The problem of the body part edge folding up due to laser diffraction is better improved.

[0014] According to any one of the foregoing embodiments of the first aspect of the present application, a second opening is formed between two adjacent isolation parts, and the edges of the orthographic projection of the second electrodes located on the opposite sides of the second opening on the substrate are located within the orthographic projection of the second opening on the substrate.

[0015] According to any one of the foregoing embodiments of the first aspect of the present application, a metal shielding layer is further included, located on the side of the first electrode layer away from the pixel definition layer, the metal shielding layer comprises a shielding part, the orthographic projection of the gap on the substrate is located within the orthographic projection of the shielding part on the substrate, and the orthographic projection of the hollow part on the substrate and the orthographic projection of the shielding part on the substrate are not overlapped. The shielding part of the metal shielding layer can shield the laser, so that the second conductive material corresponding to the gap can be retained.

[0016] According to any one of the foregoing embodiments of the first aspect of the present application, a projection of the at least partial second opening on the substrate is located within a projection of the shielding portion on the substrate.

[0017] According to any one of the foregoing embodiments of the first aspect of the present application, the shielding portion comprises:

[0018] a first sub-portion extending in a strip shape along the second direction, and a plurality of first sub-portions being arranged side by side along the first direction;

[0019] a second sub-portion extending along the first direction and connected with the plurality of first sub-portions, and a projection of the at least partial body portion on the substrate being located within a projection of the first sub-portion on the substrate;

[0020] In the plurality of gaps and the plurality of second openings arranged side by side along the second direction, a projection of each gap and each second opening on the substrate is located within a projection of the same first sub-portion on the substrate. A specific embodiment is provided, so that the body portions can be connected with each other to form a common electrode of an integral surface.

[0021] According to any one of the foregoing embodiments of the first aspect of the present application, the display panel has a first area and a second area surrounding at least part of the first area, and the first sub-portion is located in the first area and the second sub-portion is located in the second area. The distribution area of the body portion in the first area can be further reduced, and the light transmittance of the first area can be improved.

[0022] Embodiments of the second aspect of the present application provide a display device comprising the display panel of any one of the foregoing embodiments.

[0023] Embodiments of the third aspect of the present application provide a preparation method of a display panel, comprising:

[0024] coating a first conductive material layer on the substrate, and performing a patterning process on the first conductive material to form a first electrode layer, the first electrode layer comprising a first electrode;

[0025] coating an insulating material layer on a side of the first electrode layer facing away from the substrate, and performing a patterning process on the insulating material layer to form a pixel definition layer, the pixel definition layer comprising an isolation portion and a first opening formed by the isolation portion, and the first electrode being at least partially exposed by the first opening;

[0026] coating a second conductive material layer on the pixel definition layer;

[0027] performing a laser etching process on the second conductive material layer from a side of the substrate facing away from the first electrode layer to form a second electrode layer, the second electrode layer comprising a body portion and a hollow portion penetrating through the body portion, and a projection of the hollow portion and the first electrode on the substrate being arranged without overlapping.

[0028] According to the display panel provided in the embodiments of the present application, the display panel comprises a substrate, a first electrode layer, a pixel definition layer and a second electrode layer arranged on the substrate. The first electrode layer comprises a first electrode, the second electrode layer comprises a body part and a hollow part, and the hollow part and the first electrode are arranged without overlapping in the orthographic projection on the substrate. In the preparation process of the second electrode layer, the first electrode layer can be used as a mask plate, and laser is emitted from the side of the substrate away from the first electrode layer towards the second electrode layer, so as to form the hollow part. On the one hand, the hollow part is arranged on the second electrode layer, the distribution area of the body part can be reduced, and thus the light transmittance of the display panel is improved, and the photosensitive component can be integrated on the non-display side of the display panel. On the other hand, one of the first electrode layer and the second electrode layer is arranged on one side of the pixel definition layer, and the other is arranged on the other side of the pixel definition layer, and the distance between the first electrode layer and the second electrode layer is relatively close, so that the body part is prevented from being folded towards the edge of the hollow part due to laser diffraction, and the packaging effect of the subsequent packaging process is affected.

[0029] Therefore, in the preparation process of the display panel provided in the embodiments of the present application, the first electrode layer can be used as a mask plate to form the hollow part on the second electrode layer, so as to improve the light transmittance of the display panel and facilitate the under-screen integration of the photosensitive component. Moreover, the distance between the first electrode layer and the second electrode layer is relatively close, so that the body part is prevented from being folded towards the edge of the hollow part due to laser diffraction, and the packaging effect of the subsequent packaging process is affected. BRIEF DESCRIPTION OF DRAWINGS

[0030] Other characteristics, objects and advantages of the present application will become more apparent from the following detailed description of non-restrictive embodiments, with reference to the attached drawings, in which the same or similar reference signs refer to the same or similar features, and the drawings are not drawn to scale.

[0031] Figure 1 is a structural schematic diagram of a display panel provided in a first aspect of the present application;

[0032] Figure 2 is Figure 1 is a sectional view of A-A in FIG. 1;

[0033] Figure 3 is a structural schematic diagram of a display panel provided in another embodiment of the present application; Figure 1 is a sectional view of A-A in FIG. 2;

[0034] Figure 4 is a structural schematic diagram of a display panel provided in still another embodiment of the present application; Figure 1 is a sectional view of A-A in FIG. 3;

[0035] Figure 5 is a structural schematic diagram of a display panel provided in still another embodiment of the present application; Figure 1 is a sectional view of A-A in FIG. 4;

[0036] Figure 6 is Figure 1A local enlarged structure schematic view at Q in FIG. 1;

[0037] Figure 7 is still another embodiment in which Figure 1 A sectional view at A-A in FIG. 1;

[0038] Figure 8 is still another embodiment in which Figure 1 A local enlarged structure schematic view at Q in FIG. 1;

[0039] Figure 9 is a flow chart of a preparation method of a display panel according to a third aspect of the present application.

[0040] Legend of reference signs:

[0041] 10, display panel;

[0042] 100, substrate;

[0043] 200, first electrode layer; 210, first electrode; 220, second electrode; 230, gap;

[0044] 300, pixel definition layer; 310, isolation portion; 320, first opening; 330, second opening;

[0045] 400, second electrode layer; 410, body portion; 420, hollow portion;

[0046] 500, metal shielding layer; 510, shielding portion; 511, first sub-portion; 512, second sub-portion;

[0047] AA1, first display area; AA2, second display area. DETAILED DESCRIPTION

[0048] The features and exemplary embodiments of the various aspects of the present application will be described in detail below, in order to make the purposes, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present application, and are not configured to limit the present application. The present application can be implemented without some of these specific details by those skilled in the art. The following description of the embodiments is only to provide a better understanding of the present application by showing examples of the present application.

[0049] It is to be noted that, in the present document, relational terms such as first and second, and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0050] It will be understood that, in the description of the structure of components, when one layer, one region is referred to as being "on" or "above" another layer, another region, it can mean directly on or above another layer, another region, or other layers or regions are included therebetween. And if the component is turned over, the layer, the region will be "under" or "below" the other layer, the other region.

[0051] On electronic devices such as mobile phones and tablets, it is necessary to integrate photosensitive components such as front cameras, infrared light sensors, proximity light sensors, and the like on the side where the display panel is arranged. In some embodiments, a light-transmissive display area can be arranged on the electronic device, and the photosensitive components are arranged on the back of the light-transmissive display area. In the case of ensuring the normal operation of the photosensitive components, the full-screen display of the electronic device is realized.

[0052] In order to improve the light transmittance of the light-transmissive display area, in some related technologies, the common electrode is subjected to patterning processing. The common electrode is formed in a hollowed-out manner in the light-transmissive area of the display panel to improve the light transmittance of the common electrode, and thus the light transmittance of the light-transmissive area of the display panel can be improved. In related technologies, laser ashing and the like are generally used to realize the patterning processing of the common electrode.

[0053] However, in the related art, when the laser ashing is used to pattern the common electrode, the laser irradiation is generally performed on the common electrode from the side of the substrate away from the array film layer after the array film layer, the light-emitting layer, and the common electrode are formed on the substrate, and the light-shielding metal layer in the array film layer is used as a mask plate to realize the laser etching and patterning processing of the common electrode. The inventors have found through long-term research that after the laser etching and patterning processing of the common electrode, the edge of the common electrode is prone to be folded, which affects the subsequent thin film packaging process and the reliability of the packaging process.

[0054] To solve the above problems, the embodiments of the present application provide a display panel, a display device and a preparation method of the display panel, which will be described below in combination with the drawings.

[0055] The embodiments of the present application provide a display panel, which can be an organic light emitting diode (OLED) display panel.

[0056] Please refer to Figure 1 and Figure 2 , Figure 1 is a structural schematic diagram of a display panel 10 provided by the first aspect of the present application, Figure 2 is Figure 1 a sectional view at A-A in FIG. 1.

[0057] As shown in FIGS. 1 and 2, the display panel 10 provided by the first aspect of the present application includes a substrate 100, a first electrode layer 200, a pixel definition layer 300 and a second electrode layer 400. Figure 1 and Figure 2 The first electrode layer 200 is located on the substrate 100, and includes a first electrode 210. The pixel definition layer 300 is located on a side of the first electrode layer 200 away from the substrate 100, and includes an isolation portion 310 and a first opening 320 enclosed by the isolation portion 310, and the first electrode 210 is at least partially exposed by the first opening 320. At least part of the second electrode layer 400 is located on a side of the pixel definition layer 300 away from the substrate 100, and includes a body portion 410 and a hollow portion 420 penetrating through the body portion 410, and the hollow portion 420 and the first electrode 210 are not overlapped in orthographic projection on the substrate 100.

[0058] The embodiments of the present application provide a display panel 10, which includes a substrate 100 and a first electrode layer 200, a pixel definition layer 300 and a second electrode layer 400 arranged on the substrate 100. The first electrode layer 200 includes a first electrode 210. The pixel definition layer 300 includes a first opening 320 and an isolation portion 310, and a light emitting unit (not shown in the figure) can be arranged in the first opening 320, and the first electrode 210 is exposed by the first opening 320, so that the first electrode 210 can drive the light emitting unit in the first opening 320 to emit light. The second electrode layer 400 includes a body portion 410 and a hollow portion 420, and the hollow portion 420 and the first electrode 210 are not overlapped in orthographic projection on the substrate 100, that is, the hollow portion 420 and the first opening 320 are misaligned, which can avoid affecting the display of the display panel 10.

[0059] In the display panel 10 provided in the present application, the first electrode layer 200 can be used as a shielding layer, for example, the first electrode 210 is used as a mask plate, laser is emitted from the side of the substrate 100 away from the first electrode layer 200 to the second electrode layer 400, and the second electrode layer 400 is laser etched to form the hollow part 420. On the one hand, the hollow part 420 is arranged in the second electrode layer 400, which can reduce the distribution area of the body part 410, thereby improving the light transmittance of the display panel 10, and the photosensitive components can be integrated on the non-display side of the display panel 10. On the other hand, one of the first electrode layer 200 and the second electrode layer 400 is arranged on one side of the pixel definition layer 300, and the other is arranged on the other side of the pixel definition layer 300. The distance between the first electrode layer 200 and the second electrode layer 400 is close, which can reduce or avoid the problem that the body part 410 is folded towards the edge of the hollow part 420 due to laser diffraction, thereby affecting the packaging effect of the subsequent packaging process and affecting the display effect of the display panel 10.

[0060] The display panel 10 provided in the present application has the following beneficial effects: on the one hand, the hollow part 420 arranged in the second electrode layer 400 can reduce the distribution area of the body part 410, thereby improving the light transmittance of the display panel 10, and the photosensitive components can be integrated on the non-display side of the display panel 10. On the other hand, one of the first electrode layer 200 and the second electrode layer 400 is arranged on one side of the pixel definition layer 300, and the other is arranged on the other side of the pixel definition layer 300. The distance between the first electrode layer 200 and the second electrode layer 400 is close, which can avoid the problem that the body part 410 is folded towards the edge of the hollow part 420 due to laser diffraction, thereby affecting the packaging effect of the subsequent packaging process.

[0061] The substrate 100 can be arranged in various ways. For example, the substrate 100 can include a substrate and an array film layer arranged on the substrate; or the substrate 100 is the substrate; or the substrate 100 further includes a buffer layer and a support plate arranged on the side away from the substrate.

[0062] The first electrode layer 200 is, for example, an anode layer, and the second electrode layer 400 is a cathode layer. When the first electrode layer 200 and the second electrode layer 400 are used to drive the light emitting unit in the first opening 320 to emit light, the first electrode 210 in the first electrode layer 200 acts as an anode, and the body part 410 of the second electrode layer 400 acts as a cathode.

[0063] Optionally, the edge of the orthographic projection of the first electrode 210 on the substrate 100 is located within the orthographic projection of the isolation part 310 on the substrate 100, and the orthographic projection of each first opening 320 on the substrate 100 is located within the orthographic projection of each first electrode 210 on the substrate 100, which can increase the contact area of the first electrode 210 and the light emitting unit, and improve the light emitting effect.

[0064] Please continue to refer to Figure 1 In some optional embodiments, the display panel 10 has a first display area AA1, a second display area AA2, and a non-display area surrounding the first display area AA1 and the second display area AA2, wherein the first display area AA1 and the second display area AA2 are display areas, and the light transmittance of the first display area AA1 is greater than that of the second display area AA2.

[0065] In the present application, optionally, the light transmittance of the first display area AA1 is greater than or equal to 15%. In order to ensure that the light transmittance of the first display area AA1 is greater than 15%, even greater than 40%, or even has a higher light transmittance, the light transmittance of each functional film layer of the display panel 10 located in the first display area AA1 in the present embodiment is greater than 80%, and even the light transmittance of at least part of the functional film layers is greater than 90%.

[0066] According to the display panel 10 of the embodiments of the present application, the light transmittance of the first display area AA1 is greater than that of the second display area AA2, so that the photosensitive component can be integrated on the non-display side of the first display area AA1 of the display panel 10, realizing the under-screen integration of the photosensitive component of the camera, and at the same time, the first display area AA1 can display a picture, improving the display area of the display panel 10 and realizing the full-screen design of the display device.

[0067] Optionally, the hollow part 420 of the second electrode layer 400 can be located in the first display area AA1 to improve the light transmittance of the first display area AA1. In other embodiments, the hollow part 420 of the second electrode layer 400 can also be located in the first display area AA1 and the second display area AA2 at the same time to improve the light transmittance of the entire display area. It can be understood that the embodiments provided in the present application can be arranged in the first display area AA1 and / or the second display area AA2, and the specific arrangement is made according to the actual situation.

[0068] Please refer to Figure 1 and Figure 3 , Figure 3 is another embodiment Figure 1 A-A cross-sectional view in

[0069] As Figure 1 and Figure 3 shown, in some optional embodiments, the pixel definition layer 300 further includes a second opening 330 arranged through the pixel definition layer 300, and the orthographic projection of the hollow part 420 on the substrate 100 is located within the orthographic projection of the second opening 330 on the substrate 100.

[0070] In these optional embodiments, when the second electrode layer 400 is prepared on the pixel definition layer 300, a second conductive material layer is first formed on the pixel definition layer 300, and then the second conductive material layer is subjected to a patterning process to form the second electrode layer 400. The second conductive material layer can be directly deposited in the second opening 330, further reducing the distance between the second conductive material layer and the first electrode layer 200.

[0071] When the second conductive material layer is subjected to laser etching and ashing by the first electrode 210, a hollow portion 420 can be formed in the area corresponding to the second opening 330, which can better improve the problem of the body portion 410 turning up towards the edge of the hollow portion 420. Specifically, the closer the distance, the smaller the diffraction, and the better the laser focusing effect, so the influence of the body portion 410 turning up on the subsequent packaging process can be better improved.

[0072] Optionally, when the common layers such as the hole transport layer, the hole injection layer, the electron transport layer, and the electron injection layer are prepared on the pixel definition layer 300, these common layers are further provided between the first electrode 210 and the second conductive material layer.

[0073] Please refer to Figure 1 、 Figure 3 and Figure 4 , Figure 4 are Figure 1 are the local enlarged structural schematic diagrams of Q in Figure 4 , only the relative position relationship between the first electrode layer 200 and the pixel definition layer 300 is shown.

[0074] As shown in Figure 1 and Figure 3 , in some optional embodiments, at least part of the edge of the orthographic projection of the first electrode 210 on the substrate 100 is located within the orthographic projection of the second opening 330 on the substrate 100, that is, the first electrode 210 at least partially extends to the second opening 330 from the side of the isolation portion 310 towards the substrate 100.

[0075] When the body portion 410 is formed by patterning the second electrode layer 400 by the first electrode 210, the area where the first electrode 210 is located forms a body portion 410 that is not etched due to the shielding of the first electrode 210. At least part of the edge of the orthographic projection of the first electrode 210 on the substrate 100 is located within the orthographic projection of the second opening 330 on the substrate 100, which can ensure that the edge of the body portion 410 towards the hollow portion 420 is located within the second opening 330, and ensure that the edge of the body portion 410 is close to the first electrode 210, better improving the problem of the body portion 410 turning up towards the edge of the hollow portion 420.

[0076] In some optional embodiments, referring to Figure 4 The first electrode layer 200 further comprises a second electrode 220, and the second electrode 220 and the first electrode 210 are not overlapped on the substrate 100 in the orthographic projection. By arranging the second electrode 220, the first electrode layer 200 can better play the role of a mask in the process of forming the hollow part 420 by laser ashing the second electrode layer 400 without affecting the normal operation of the first electrode 210.

[0077] Optionally, no common layer or the like structure is arranged between the second electrode 220 and the second electrode layer 400 to further reduce the distance between the second electrode 220 and the second electrode layer 400.

[0078] Referring to Figure 5 In some optional embodiments, at least part of the edge of the orthographic projection of the second electrode 220 on the substrate 100 is located within the orthographic projection of the second opening 330 on the substrate 100, that is, the second electrode 220 is extended to the second opening 330 from the side of the isolation part 310 toward the substrate 100.

[0079] In these embodiments, when the second electrode layer 400 is patterned by the second electrode 220 to form the body part 410, the area where the second electrode 220 is located forms the body part 410 that is not etched due to the shielding effect of the second electrode 220. The at least part of the edge of the orthographic projection of the second electrode 220 on the substrate 100 is located within the orthographic projection of the second opening 330 on the substrate 100, which can ensure that the edge of the body part 410 toward the hollow part 420 is located within the second opening 330, and ensure that the edge of the body part 410 is close to the second electrode 220, thereby better improving the problem of the edge of the body part 410 toward the hollow part 420 being turned up.

[0080] Optionally, the maximum distance between the second electrode 220 and the body part 410 in the thickness direction of the display panel 10 is less than or equal to 0.8 μm. This makes the distance between the second electrode 220 and the body part 410 closer, thereby better improving the problem of the edge of the body part 410 toward the hollow part 420 being turned up.

[0081] Since the first electrode 210 and the second electrode 220 are arranged in the same layer, the maximum distance between the second electrode 220 and the body part 410 in the thickness direction of the display panel 10 is less than or equal to 0.8 μm. Specifically, the distance between the second electrode 220 and the body part 410 in the thickness direction of the display panel 10 can be 200 nm, 500 nm, 800 nm, etc. This makes the distance between the first electrode layer 200 and the body part 410 closer, thereby better improving the problem of the edge of the body part 410 toward the hollow part 420 being turned up.

[0082] In some optional embodiments, the second electrode 220 and the first opening 320 are misaligned, i.e., the orthographic projection of the second electrode 220 on the substrate 100 and the orthographic projection of the first opening 320 on the substrate 100 are not overlapped. The second electrode 220 avoids affecting the light emitting effect of the light emitting unit in the first opening 320.

[0083] As shown in Figure 4 and Figure 5 , in some optional embodiments, there is a gap 230 between the first electrode 210 and the second electrode 220, which avoids the short circuit connection of the first electrode 210 through the second electrode 220 and the body part 410 of the second electrode layer 400 due to the mutual connection of the second electrode 220 and the body part 410 of the second electrode layer 400, and can further improve the yield of the display panel 10. In addition, by providing the second electrode 220, the laser heat can be blocked from being conducted to the light emitting unit through the first electrode 210 to affect the display effect.

[0084] The size of the gap 230 can be various, and optionally, the width of the gap 230 is 0.5 μm-10 μm. Specifically, the size of the gap 230 can be 0.5 μm, 1 μm, 5 μm, etc., which can improve the short circuit connection of the second electrode 220 and the body part 410 due to the too small gap 230, and can also improve the too large gap 230, which causes the formation of a through hole in the position corresponding to the gap 230 on the second electrode layer 400 when the first electrode layer 200 is used as a mask plate, affecting the overlapping area of the first electrode 210 and the second electrode layer 400, and affecting the light emitting effect of the light emitting unit. It can be understood that the width of the gap 230 refers to the size in the first direction X.

[0085] The mutual arrangement mode of the first electrode 210 and the second electrode 220 can be various, for example, one second electrode 220 can be arranged between two adjacent first electrodes 210.

[0086] In some other optional embodiments, please refer to Figure 6 , the first electrode 210 and the second electrode 220 are one-to-one corresponding, and each second electrode 220 is arranged around each first electrode 210 to form a ring-shaped gap 230 on the side of each first electrode 210.

[0087] In these optional embodiments, each first electrode 210 is correspondingly provided with a second electrode 220, and a hollow portion 420 can be formed between two adjacent second electrodes 220, which can increase the distribution area of the hollow portion 420 and reduce the distribution area of the body portion 410, thereby improving the light transmittance of the display panel 10. In addition, the second electrode 220 is arranged around the first electrode 210, which can ensure that the hollow portion 420 and the first electrode 210 do not overlap, thereby avoiding the influence of the hollow portion 420 on the light emission of the light emitting unit in the first opening 320. The annular gap 230 can ensure the mutual insulation between the second electrode 220 and the first electrode 210, thereby avoiding the short circuit connection of the first electrode 210 through the second electrode 220 and the body portion 410 of the second electrode layer 400.

[0088] In some optional embodiments, as shown in Figure 6 , the isolation portion 310 and the first electrode 210 are one-to-one corresponding, and the isolation portion 310 is annular, and the orthographic projection of each gap 230 on the substrate 100 is located within the orthographic projection of each isolation portion 310 on the substrate 100.

[0089] In these optional embodiments, the isolation portion 310 is annular, which can form a second opening 330 with a larger size between adjacent isolation portions 310, thereby further increasing the distribution area of the second electrode 200 and the second electrode layer 400 that are relatively close, and better improving the problem of the edge of the body portion 410 turning up due to laser diffraction.

[0090] In addition, the orthographic projection of each gap 230 on the substrate 100 is located within the orthographic projection of each isolation portion 310 on the substrate 100, and the body portion 410 of the second electrode layer 400 is located on the side of the isolation portion 310 away from the first electrode layer 200, so as to ensure the mutual insulation between the second electrode layer 400 and the first electrode 210.

[0091] Optionally, please continue to refer to Figure 6 , the second opening 330 is formed between two adjacent isolation portions 310, and the edges of the orthographic projections of the second electrodes 220 located on the opposite sides of the second opening 330 on the substrate 100 are located within the orthographic projection of the second opening 330 on the substrate 100.

[0092] For example, when the first electrode 210 is arranged along the first direction X Figure 6 and the second direction Y Figure 6 ​When the second electrode 220 is distributed in an array manner in the Y direction, the second electrode 220 is arranged on both sides of the second opening 330 in the first direction X and in the second direction Y, and the edges of the second electrode 220 on both sides of the second opening 330 in the first direction X in the orthographic projection of the second electrode 220 on the substrate 100 are located within the orthographic projection of the second opening 330 on the substrate 100, that is, the edges of the second electrode 220 on both sides of the second opening 330 in the first direction X all extend into the second opening 330. Similarly, the edges of the second electrode 220 on both sides of the second opening 330 in the second direction Y can also all extend into the second opening 330, so as to further increase the distribution area of the second electrode layer 400 and the second electrode 220 that are relatively close to each other and better improve the problem of the edge of the body part 410 being turned up due to laser diffraction.

[0093] Please refer to Figure 1 、 Figure 7 and Figure 8 , Figure 7 is another embodiment Figure 1 is a sectional view of A-A in Figure 8 is another embodiment Figure 1 is a partial enlarged structural schematic view of Q in

[0094] As shown in Figure 1 、 Figure 7 and Figure 8 , in some optional embodiments, the display panel 10 further includes a metal shielding layer 500 located on the side of the first electrode layer 200 away from the pixel definition layer 300, the metal shielding layer 500 includes a shielding part 510, the orthographic projection of the gap 230 on the substrate 100 is located within the orthographic projection of the shielding part 510 on the substrate 100, and the orthographic projection of the hollow part 420 on the substrate 100 and the orthographic projection of the shielding part 510 on the substrate 100 are arranged without overlapping.

[0095] It can be understood that, since the orthographic projection of the gap 230 on the substrate 100 is located within the orthographic projection of the shielding part 510 on the substrate 100, the second conductive material layer corresponding to the position of the gap 230 can be effectively avoided from being laser etched and ashed. It can be understood that the substrate 100 in the embodiment can include an array film layer, and the metal shielding layer 500 can be any metal film layer as long as the above requirements are met.

[0096] In an optional embodiment, at least part of the orthographic projection of the second opening 330 on the substrate 100 is located within the orthographic projection of the shielding part 510 on the substrate 100, so that the body parts 410 are in communication with each other. Figure 8 The relative positional relationship among the metal shielding layer 500, the first electrode layer 200 and the pixel definition layer 300 is shown in

[0097] In these optional embodiments, by setting the metal shielding layer 500, when laser is emitted from the side of the substrate 100 away from the first electrode layer 200 towards the second electrode layer 400, the shielding part 510 of the metal shielding layer 500 can shield the laser, and thus the second electrode layer 400 corresponding to the gap 230 and at least part of the second opening 330 can be reserved without being etched, so that the body part 410 can be in communication with each other to form a full-surface electrode. Therefore, due to the presence of the shielding part 510, the area where the shielding part 510 is located can form at least part of the body part 410 of the second electrode layer 400, and the hollow part 420 of the second electrode layer 400 can be formed in the area where the shielding part 510 is not located.

[0098] In "the orthographic projection of the at least part of the second opening 330 on the substrate 100 is located within the orthographic projection of the shielding part 510 on the substrate 100", both the orthographic projection of part of the second opening 330 on the substrate 100 being located within the orthographic projection of the shielding part 510 on the substrate 100, and the orthographic projection of at least part of the same second opening 330 on the substrate 100 being located within the orthographic projection of the shielding part 510 on the substrate 100 are included. As long as the body part 410 can be in communication with each other, it is acceptable.

[0099] It can be understood that in other embodiments, the orthographic projection of the at least part of the second electrode 220 on the substrate 100 can also be located within the orthographic projection of the shielding part 510 on the substrate 100, and by this setting mode, the body part 410 can be in communication with each other.

[0100] The shielding part 510 can have various setting modes of shapes, and in some optional embodiments, please continue to refer to Figure 8 , the shielding part 510 includes: a first part 511 extending in the second direction Y in a strip shape, and a plurality of first parts 511 are arranged side by side in the first direction X; a second part 512 extending in the first direction X and connected with the plurality of first parts 511 arranged side by side in the first direction X; wherein the orthographic projection of at least part of the body part 410 on the substrate 100 is located within the orthographic projection of the first part 511 on the substrate 100, and the orthographic projection of each gap 230 and each second opening 330 on the substrate 100 is located within the orthographic projection of the same first part 511 on the substrate 100 among the plurality of gaps 230 and the plurality of second openings 330 arranged side by side in the second direction Y.

[0101] It can be understood that the first part 511 can be a regular strip structure, such as a rectangle, etc., and the first part 511 can also be an irregular strip structure, as long as the whole can extend in the second direction Y, and the specific shape of the first part 511 is not specifically limited here.

[0102] In these optional embodiments, the first sub-section 511 can shield at least part of each of the plurality of gaps 230 and part of each of the plurality of second openings 330 in the same row (when the second direction Y is the row direction). Alternatively, the first sub-section 511 can shield at least part of each of the plurality of gaps 230 and part of each of the plurality of second openings 330 in the same column (when the second direction Y is the column direction), so that the body sections 410 in the same row or the same column can be in communication with each other. By the shielding effect of the second sub-section 512, the body sections 410 in the same distribution area and the same size as the second sub-section 512 can be formed, and thus the body sections 410 in different positions can be in communication with each other to form a whole-surface common electrode.

[0103] The second sub-section 512 can be arranged in various ways, for example, when the display panel 10 has a first area and a second area surrounding at least part of the first area, the first sub-section 511 is arranged in the first area, and the second sub-section 512 is arranged in the second area, the distribution area of the body sections 410 in the first area can be further reduced, and the light transmittance of the first area can be improved. The second area can be a non-display area, or the second area is a second display area AA2, which is not limited here.

[0104] The embodiments of the second aspect of the present application also provide a display device, which includes the display panel 10 of any of the embodiments of the first aspect. Since the display device provided by the embodiments of the second aspect of the present application includes the display panel 10 of any of the embodiments of the first aspect, the display device provided by the embodiments of the second aspect of the present application has the beneficial effects of the display panel 10 of any of the embodiments of the first aspect, which will not be repeated here.

[0105] The display device in the embodiments of the present application includes but is not limited to a mobile phone, a personal digital assistant (PDA), a tablet computer, an electronic book, a television, an access control, a smart fixed telephone, a console, and other devices with display functions.

[0106] Please refer to Figure 9 , Figure 9 is a flowchart of a method for manufacturing a display panel 10 provided by the third aspect of the present application. The display panel 10 can be the display panel 10 provided by any of the embodiments of the first aspect.

[0107] As Figure 9 and please refer to Figures 1 to 8 , the method for manufacturing the display panel 10 includes:

[0108] Step S01: coating a first conductive material layer on a substrate, and performing a patterning process on the first conductive material to form a first electrode layer, the first electrode layer including a first electrode.

[0109] Step S02: An insulating material layer is prepared on the side of the first electrode layer away from the substrate, and the insulating material layer is subjected to a patterning process to form a pixel definition layer, the pixel definition layer including an isolation portion and a first opening formed by the isolation portion, the first electrode being at least partially exposed by the first opening.

[0110] Optionally, after step S02, a hole injection layer, a hole transport layer, a light emitting unit, an electron transport layer, and an electron injection layer, etc. can be further provided on the pixel definition layer 300.

[0111] Step S03: A second conductive material layer is prepared on the pixel definition layer.

[0112] Step S04: The second conductive material layer is subjected to a laser etching process from the side of the substrate away from the first electrode layer to form a second electrode layer, the second electrode layer including a body portion and a hollow portion penetrating through the body portion, the hollow portion and the first electrode being arranged without overlapping in orthographic projection on the substrate.

[0113] In the preparation method of the display panel 10 provided in the embodiments, the first electrode 210 is first formed by step S01, the first electrode 210 can serve as a mask plate for the patterning process of the second conductive material layer in step S03, and the second conductive material layer in the region where the first electrode 210 is located will not be etched to form the body portion 410 of the second electrode layer 400. Then the pixel definition layer 300 is formed by step S02, so that the light emitting unit can be arranged in the first opening 320, and the first electrode 210 and the body portion 410 of the second electrode layer 400 can drive the light emitting unit to emit light. Since the first electrode 210 serves as a mask plate for the patterning process of the second conductive material layer, the material of the second conductive material layer in the region where the first electrode 210 is not present is etched by laser. Therefore, the body portion 410 of the second electrode layer 400 is at least partially arranged in overlapping with the orthographic projection of the first electrode 210 in the thickness direction, and the hollow portion 420 and the first electrode 210 are arranged without overlapping in orthographic projection on the substrate 100.

[0114] In some optional embodiments, the insulating material layer can also be patterned to form the second opening 330 in step S02. Since no light emitting unit is arranged in the second opening 330, when the common layers such as the hole injection layer, the hole transport layer, the electron transport layer and the electron injection layer are arranged on the pixel defining layer 300, these common layers can be directly deposited on the first electrode 210 in the second opening 330. When the second conductive material layer is formed in step S03, the common layers are arranged between the second conductive material layer and the first electrode 210, without the isolation portion 310 or other structures, so that the distance between the second conductive material layer and the first electrode 210 in the area where the second opening 330 is located can be further reduced. When the second conductive material layer is patterned with the first electrode 210 as a mask in step S04, the diffraction can be improved, and the edge of the body portion 410 can be prevented from being turned up, so as to affect the yield of the subsequent packaging process.

[0115] In some optional embodiments, the first electrode layer 200 further includes the second electrode 220, the second electrode 220 and the first electrode 210 are arranged without overlapping in the orthographic projection of the substrate 100, at least part of the edge of the orthographic projection of the second electrode 220 is located in the orthographic projection of the second opening 330 on the substrate 100, and the gap 230 is arranged between the second electrode 220 and the first electrode 210, so as to prevent the body portion 410 of the second electrode layer 400 from being short-circuited by the second electrode 220 and the first electrode 210.

[0116] In some optional embodiments, before step S01, the metal shielding layer 500 can also be formed, and the metal shielding layer 500 includes the shielding portion 510. Specifically, the orthographic projection of the gap 230 on the substrate 100 can be located in the orthographic projection of the shielding portion 510 on the substrate 100. Alternatively, the orthographic projection of the gap 230 and at least part of the second opening 330 on the substrate 100 can be located in the orthographic projection of the shielding portion 510 on the substrate 100. Since the shielding portion 510 exists, when the second conductive material layer is patterned by laser in step S04, the shielding portion 510 can shield the laser, so that the second conductive material layer in the area where the shielding portion 510 is located is not etched, and thus the hollow portion 420 is not formed in the area where the shielding portion 510 is located. The orthographic projection of the hollow portion 420 on the substrate 100 and the orthographic projection of the shielding portion 510 on the substrate 100 are arranged without overlapping.

[0117] The position of the shielding portion 510 can be various, as long as the body portion 410 can be in communication with each other due to the existence of the shielding portion 510. As described above, the shielding portion 510 can include the first sub-portion 511 and the second sub-portion 512.

[0118] In accordance with the embodiments of the application described above, these embodiments are not meant to be all-inclusive or limiting of the scope of the application. It will be apparent to those having skill in the art that many more modifications than those already described are possible. The present specification has been put forth with a full description for the purpose of enabling others skilled in the art to employ this application and modifications made by others skilled in the art based on the teachings herein. The application is limited only by the claims and their full scope and equivalents.

Claims

1. A display panel, characterized by, The display panel comprises: a substrate; a first electrode layer located on the substrate, the first electrode layer comprising a first electrode; a pixel definition layer located on a side of the first electrode layer away from the substrate, the pixel definition layer comprising an isolation portion and a first opening formed by the isolation portion, the first electrode being at least partially exposed by the first opening; a second electrode layer at least partially located on a side of the pixel definition layer away from the substrate, the second electrode layer comprising a body portion and a hollow portion penetrating through the body portion, the hollow portion and the first electrode being arranged without overlapping in orthographic projection on the substrate, wherein the pixel definition layer further comprises a second opening penetrating through the pixel definition layer, the orthographic projection on the substrate of the hollow portion being located within the orthographic projection on the substrate of the second opening, and at least part of the edges of the orthographic projection on the substrate of the first electrode being located within the orthographic projection on the substrate of the second opening.

2. A display panel, characterized by, The display panel comprises: a substrate; a first electrode layer located on the substrate, the first electrode layer comprising a first electrode; a pixel definition layer located on a side of the first electrode layer away from the substrate, the pixel definition layer comprising an isolation portion and a first opening formed by the isolation portion, the first electrode being at least partially exposed by the first opening; a second electrode layer at least partially located on a side of the pixel definition layer away from the substrate, the second electrode layer comprising a body portion and a hollow portion penetrating through the body portion, the hollow portion and the first electrode being arranged without overlapping in orthographic projection on the substrate, wherein the first electrode layer further comprises a second electrode, the hollow portion and the second electrode, and the first electrode being arranged without overlapping in orthographic projection on the substrate, and the orthographic projection on the substrate of the second electrode and the orthographic projection on the substrate of the first opening being arranged without overlapping.

3. The display panel of claim 2, wherein, The pixel definition layer further comprises a second opening penetrating through the pixel definition layer, the orthographic projection on the substrate of the hollow portion being located within the orthographic projection on the substrate of the second opening, and at least part of the edges of the orthographic projection on the substrate of the second electrode being located within the orthographic projection on the substrate of the second opening.

4. The display panel of claim 2, wherein, The maximum distance between the second electrode and the body portion in the thickness direction of the display panel is less than or equal to 0.8 μm.

5. The display panel of claim 3, wherein, There is a gap between the first electrode and the second electrode.

6. The display panel of claim 5, wherein, The first electrode and the second electrode are arranged in one-to-one correspondence, and each second electrode is arranged to surround each first electrode to form a ring-shaped gap on the side of each first electrode.

7. The display panel of claim 5, wherein, The width of the gap is 0.5 μm to 10 μm.

8. The display panel of claim 5, wherein, The isolation portion and the first electrode are arranged in one-to-one correspondence, and the isolation portion is ring-shaped, and the orthographic projection on the substrate of each gap is located within the orthographic projection on the substrate of each isolation portion.

9. The display panel of claim 8, wherein, The second opening is formed between two adjacent isolation portions, and the edges of the orthographic projection on the substrate of the second electrodes located on opposite sides of the second opening are located within the orthographic projection on the substrate of the second opening.

10. The display panel of claim 8, wherein, The display panel further comprises a metal shielding layer on a side of the first electrode layer away from the pixel definition layer, the metal shielding layer comprises a shielding portion, a projection of the gap on the substrate is within a projection of the shielding portion on the substrate, and a projection of the hollow portion on the substrate and the projection of the shielding portion on the substrate are arranged without overlapping.

11. The display panel of claim 10, wherein, A projection of at least part of the second opening on the substrate is within a projection of the shielding portion on the substrate.

12. The display panel of claim 10, wherein, The shielding portion comprises: a first sub-portion extending in a second direction in a strip shape, and a plurality of the first sub-portions are arranged side by side in a first direction; a second sub-portion extending in the first direction and connected with the plurality of the first sub-portions, and a projection of at least part of the body portion on the substrate is within a projection of the first sub-portion on the substrate; wherein, in the plurality of the gaps and the plurality of the second openings arranged side by side in the second direction, a projection of each of the gap and the second opening on the substrate is within a projection of the same first sub-portion on the substrate.

13. The display panel of claim 12, wherein, The display panel has a first area and a second area surrounding at least part of the first area, the first sub-portion is located in the first area, and the second sub-portion is located in the second area.

14. A display device comprising: The display panel comprises any one of claims 1-13.

15. A method for manufacturing a display panel, characterized by, The display panel comprises: a first conductive material layer is prepared on a substrate, and the first conductive material is patterned to form a first electrode layer, the first electrode layer comprises a first electrode; an insulating material layer is prepared on a side of the first electrode layer away from the substrate, and the insulating material layer is patterned to form a pixel definition layer, the pixel definition layer comprises an isolation portion and a first opening and a second opening formed by the isolation portion, the first electrode is exposed at least partially by the first opening, and at least part of an edge of a projection of the first electrode on the substrate is within a projection of the second opening on the substrate; a second conductive material layer is prepared on the pixel definition layer; a laser etching process is performed on the second conductive material layer from a side of the substrate away from the first electrode layer to form a second electrode layer, the second electrode layer comprises a body portion and a hollow portion penetrating through the body portion, and a projection of the hollow portion on the substrate and a projection of the first electrode on the substrate are arranged without overlapping.

16. A method for manufacturing a display panel, characterized by, The display panel comprises: a first conductive material layer is prepared on a substrate, and the first conductive material is patterned to form a first electrode layer, the first electrode layer comprises a first electrode and a second electrode arranged at intervals; an insulating material layer is prepared on a side of the first electrode layer away from the substrate, and the insulating material layer is patterned to form a pixel definition layer, the pixel definition layer comprises an isolation portion and a first opening formed by the isolation portion, the first electrode is exposed at least partially by the first opening, and a projection of the second electrode on the substrate and a projection of the first opening on the substrate are arranged without overlapping; a second conductive material layer is prepared on the pixel definition layer; The second conductive material layer is subjected to a laser etching treatment from a side of the substrate away from the first electrode layer to form a second electrode layer, the second electrode layer comprising a body portion and a hollow portion penetrating through the body portion, the hollow portion and the second electrode, the first electrode not overlapping in orthographic projection on the substrate.

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