Display panel, manufacturing method thereof, and display device

Abstract

The present application discloses a display panel, a manufacturing method thereof, and a display device. The manufacturing method of the display panel includes the following steps: providing a display substrate, including a driving substrate and a light-emitting device layer, the driving substrate including a middle portion and a peripheral portion surrounding the middle portion, and the light-emitting device layer being disposed on the middle portion; forming a plurality of spaced-apart filling droplets on a cover plate, the cover plate including a main body portion and an edge portion surrounding the main body portion, wherein the volume of the filling droplets per unit area on the main body portion is smaller than the volume of the filling droplets per unit area on the edge portion; pressing the cover plate and the display substrate together, filling the filling droplets between the display substrate and the cover plate to form a filling layer, wherein a first portion of the filling layer is located between the light-emitting device layer and the main body portion, a second portion of the filling layer is located between the peripheral portion and the edge portion, and a thickness of the first portion of the filling layer is smaller than a thickness of the second portion of the filling layer. The present application can improve display effects.

Description

Technical Field

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

[0002] During the manufacturing process of an organic light-emitting diode (OLED) display panel, a frame adhesive and filler are formed on the cover glass (CG). The filler is evenly distributed on the cover glass, and the frame adhesive is placed around the filler. The cover glass is then pressed onto the driver substrate, which has a light-emitting device layer. During the pressing process, the filler diffuses, filling the gaps between the cover glass, the light-emitting device layer, and the driver substrate, forming a filling layer.

[0003] However, because the driver substrate includes a central portion and a peripheral portion surrounding the central portion, the light-emitting device layer is disposed on the central portion of the driver substrate, resulting in a step difference between the light-emitting device layer and the peripheral portion. This step difference forms a relatively wide clearance area after the cover glass and the driver substrate are pressed together. During the diffusion process of the filler, the filler disposed between the light-emitting device layer and the cover glass diffuses into the clearance area. As the filler forms a filling layer, the thickness of the edge portion of the filling layer on the light-emitting device layer is less than the thickness of the central portion of the filling layer on the light-emitting device layer. Due to the uneven thickness of the filling layer on the light-emitting device layer, the display area of ​​the display panel exhibits a whitening phenomenon at the periphery, affecting the display effect.

[0004] Therefore, it is necessary to propose a new technical solution to solve the above technical problems. Summary of the Invention

[0005] The purpose of this application is to provide a display panel and a manufacturing method thereof, and a display device to improve the display effect.

[0006] To solve the above problems, the technical solutions of this application are as follows:

[0007] In a first aspect, the present application proposes a method for manufacturing a display panel, comprising the following steps:

[0008] A display substrate is provided, the display substrate comprising a driving substrate and a light-emitting device layer, the driving substrate comprising a middle portion and a peripheral portion surrounding the middle portion, the light-emitting device layer being disposed on the middle portion;

[0009] A plurality of filling droplets are formed on one side of the cover plate, the cover plate comprising a main body and an edge portion surrounding the main body, wherein a volume of the filling droplets per unit area on the main body is smaller than a volume of the filling droplets per unit area on the edge portion;

[0010] The cover plate is pressed together with the display substrate. After pressing together, the filling droplets are filled between the display substrate and the cover plate to form a filling layer. The first part of the filling layer is located between the light-emitting device layer and the main body, and the second part of the filling layer is located between the peripheral part and the edge part. The thickness of the first part of the filling layer is less than the thickness of the second part of the filling layer.

[0011] In one embodiment of the present application, the filling droplets include a first filling droplet and a second filling droplet, and the step of forming a plurality of filling droplets spaced apart on one side of the cover plate includes:

[0012] forming a plurality of first filling liquid droplets spaced apart from each other on the main body and the edge portion, wherein the volume of the first filling liquid droplets per unit area on the main body is equal to the volume of the first filling liquid droplets per unit area on the edge portion;

[0013] A plurality of second filling liquid drops are formed on the edge portion and are spaced apart from each other. The second filling liquid drops are spaced apart from the first filling liquid drops.

[0014] In one embodiment of the present application, the step of forming a plurality of first filling droplets spaced apart on the main body and the edge portion includes:

[0015] A plurality of first liquid droplet columns and a plurality of second liquid droplet columns are formed on the main body and the edge portion, the first liquid droplet column includes a plurality of first filling liquid droplets spaced apart along a first direction, the second liquid droplet column includes a plurality of first filling liquid droplets spaced apart along the first direction, the first liquid droplet columns and the second liquid droplet columns are alternately arranged along a second direction, the second direction intersects with the first direction, and the first filling liquid droplets of the first liquid droplet column and the first filling liquid droplets of the second droplet column are staggered in the first direction.

[0016] In one embodiment of the present application, the second filling droplet includes a first sub-droplet and a second sub-droplet, and the step of forming a plurality of second filling droplets spaced apart on the edge portion includes:

[0017] A first sub-droplet is formed between two adjacent first filling droplets spaced apart along the first direction on the edge portion, and a second sub-droplet is formed between two adjacent first filling droplets arranged along the second direction on the edge portion.

[0018] In one embodiment of the present application, the step of forming a first sub-droplet between two adjacent first filling droplets spaced apart along the first direction on the edge portion includes:

[0019] forming a first sub-droplet between two adjacent first filling droplets spaced apart along the first direction on the edge portion, wherein the first sub-droplet is spaced equidistant from the two adjacent first filling droplets along the first direction, and the volume of the first sub-droplet is equal to the volume of the first filling droplet;

[0020] The step of forming a second sub-droplet between two adjacent first filling droplets arranged along the second direction on the edge portion includes:

[0021] A second sub-droplet is formed between two adjacent first filling droplets arranged along the second direction on the edge portion, the second sub-droplet is spaced equidistant from the two adjacent first filling droplets along the second direction, and the volume of the second sub-droplet is the same as that of the first filling droplet.

[0022] In one embodiment of the present application, the step of forming a plurality of first filling droplets spaced apart on the main body and the edge includes:

[0023] forming a plurality of first filling liquid droplets arranged in an array on the main body portion and the edge portion;

[0024] The step of forming a plurality of second filling droplets spaced apart on the edge portion comprises:

[0025] A plurality of second filling liquid drops arranged at intervals are formed on the edge portion, and one second filling liquid drop is located between two adjacent first filling liquid drops.

[0026] In one embodiment of the present application, the filling droplets include a first filling droplet and a second filling droplet, and the step of forming a plurality of filling droplets spaced apart on one side of the cover plate includes:

[0027] forming a plurality of first filling droplets spaced apart on the main body;

[0028] A plurality of second filling droplets are formed on the edge portion and arranged at intervals, the volume of the second filling droplets is greater than the volume of the first filling droplets, and the volume of the first filling droplets per unit area on the main body is smaller than the volume of the second filling droplets per unit area on the edge portion.

[0029] In one embodiment of the present application, the edge portion includes a first peripheral area and a second peripheral area, the first peripheral area is arranged around the outer periphery of the main body portion, and the second peripheral area is arranged around the outer periphery of the first peripheral area. The second filling droplet includes a first sub-droplet and a second sub-droplet, and the volume of the first sub-droplet is smaller than the volume of the second sub-droplet. The step of forming a plurality of second filling droplets spaced apart on the edge portion includes:

[0030] forming a plurality of first sub-droplets spaced apart from each other on the first peripheral area;

[0031] A plurality of second sub-droplets spaced apart from each other are formed on the second peripheral region, the volume of the second sub-droplets is greater than the volume of the first sub-droplets, and the volume of the first sub-droplets per unit area on the first peripheral region is less than the volume of the second sub-droplets per unit area on the second peripheral region.

[0032] In one embodiment of the present application, the first peripheral area includes two first sub-portions and two second sub-portions, the two first sub-portions are respectively located on both sides of the main portion in a first direction, and the two second sub-portions are respectively located on both sides of the main portion in a second direction, the first direction intersects the second direction, and the two first sub-portions and the two second sub-portions enclose the first peripheral area;

[0033] The step of forming a plurality of first sub-droplets spaced apart on the first peripheral area comprises:

[0034] forming a first sub-row on the first sub-portion, wherein the first sub-row includes a plurality of the first sub-droplets spaced apart along the second direction;

[0035] forming a first sub-column on the second sub-portion, wherein the first sub-column includes a plurality of the first sub-droplets spaced apart along the first direction;

[0036] The second peripheral area includes two third sub-portions and two fourth sub-portions, the two third sub-portions are respectively located on a side of the two first sub-portions away from the main portion, and the two fourth sub-portions are respectively located on a side of the two second sub-portions away from the main portion, and the two third sub-portions and the two fourth sub-portions enclose the second peripheral area;

[0037] The step of forming a plurality of second sub-droplets spaced apart on the second peripheral area comprises:

[0038] forming a second sub-row on the third sub-section, the second sub-row comprising a plurality of second sub-droplets spaced apart along the second direction, the second sub-droplets of the second sub-row being staggered with the first sub-droplets of the first sub-row in the second direction;

[0039] A second sub-column is formed on the fourth sub-portion, the second sub-column comprising a plurality of second sub-droplets spaced apart along the first direction, the second sub-droplets of the second sub-column and the first sub-droplets of the first sub-column being staggered in the first direction.

[0040] In one embodiment of the present application, the second filling droplet includes a first sub-droplet and a second sub-droplet, the volume of the first sub-droplet is smaller than the volume of the second sub-droplet, and the step of forming a plurality of first filling droplets spaced apart on the main body includes:

[0041] forming a plurality of the first filling droplets arranged in an array on the main body;

[0042] The step of forming a plurality of second filling droplets spaced apart on the edge portion comprises:

[0043] A plurality of first sub-droplets and a plurality of second sub-droplets are formed on the edge portion, the plurality of first sub-droplets are arranged around the periphery of the plurality of first filling droplets located on the main portion, and the plurality of second sub-droplets are arranged around the periphery of the plurality of first sub-droplets, and the volume of the first sub-droplet per unit area on the edge portion is smaller than the volume of the second sub-droplet per unit area on the edge portion.

[0044] In one embodiment of the present application, before the step of pressing the cover plate and the display substrate together, the method further includes:

[0045] forming a frame glue on the edge portion, wherein the frame glue is disposed around the periphery of a plurality of filling droplets arranged at intervals;

[0046] The step of pressing the cover plate and the display substrate together comprises:

[0047] The side of the cover plate provided with the frame glue is pressed together with the side of the driving substrate provided with the light-emitting device layer. After pressing together, the frame glue connects the edge portion and the outer portion. The frame glue, the driving substrate, and the cover plate enclose a space, and the filling droplets are filled in the space to form the filling layer.

[0048] In a second aspect, the present application provides a display panel, which is manufactured using the display panel manufacturing method proposed in the present application. The display panel includes:

[0049] A display substrate, comprising a driving substrate and a light-emitting device layer, wherein the driving substrate comprises a middle portion and a peripheral portion surrounding the middle portion, and the light-emitting device layer is disposed on the middle portion;

[0050] a cover plate, arranged opposite to the driving substrate, comprising a main body portion and an edge portion surrounding the outer periphery of the main body portion;

[0051] A filling layer is filled between the display substrate and the cover plate, wherein the first portion of the filling layer is located between the light-emitting device layer and the main body portion, the second portion of the filling layer is located between the peripheral portion and the edge portion, and the thickness of the first portion of the filling layer is less than the thickness of the second portion of the filling layer.

[0052] In a third aspect, the present application proposes a display device comprising the display panel.

[0053] In the method for manufacturing a display panel of the present application, during the step of forming a plurality of spaced-apart filling droplets on one side of a cover plate, the filling droplets on the main body and the filling droplets on the edge are arranged differently to increase the volume of the filling droplets on the edge, so that the volume of the filling droplets per unit area on the main body is smaller than the volume of the filling droplets per unit area on the edge. In the subsequent step of pressing the cover plate to the display substrate, the added filling droplets on the edge diffuse into the clearance area formed by the step difference between the light-emitting device layer and the peripheral portion of the drive substrate, thereby reducing the diffusion of filling droplets between the light-emitting device layer and the main body into the clearance area, making the thickness of the filling layer formed between the light-emitting device layer and the main body uniform, eliminating the whitening phenomenon around the display area of ​​the display panel, and improving the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 is a schematic diagram of an embodiment of a conventional display panel;

[0055] Figure 2 is a schematic diagram of another embodiment of a conventional display panel;

[0056] Figure 3 is a flow chart of a method for manufacturing a display panel of the present application;

[0057] Figure 4 yes Figure 3 FIG. 1 is a schematic diagram of step S10 in the flowchart of the method for manufacturing a display panel of the present application;

[0058] Figure 5 yes Figure 3 A schematic diagram of step S20 in the flowchart of the method for manufacturing a display panel of the present application is shown;

[0059] Figure 6 is a schematic diagram of the syringe of the present application;

[0060] Figure 7 yes Figure 3 A schematic diagram of step S30 in the flowchart of the method for manufacturing a display panel of the present application is shown;

[0061] Figure 8 A schematic diagram of the vacuum laminating machine of the present application;

[0062] Figure 9 is a schematic diagram of step S21a in the flowchart of the method for manufacturing a display panel according to the first embodiment of the present application;

[0063] Figure 10 is a schematic diagram of step S22a in the flowchart of the method for manufacturing a display panel according to the first embodiment of the present application;

[0064] Figure 11 is a schematic diagram of step S21b in the flowchart of the method for manufacturing a display panel according to the second embodiment of the present application;

[0065] Figure 12 is a schematic diagram of step S22b in the flowchart of the method for manufacturing a display panel according to the second embodiment of the present application;

[0066] Figure 13 is a schematic diagram of step S21c in the flowchart of the method for manufacturing a display panel according to the third embodiment of the present application;

[0067] Figure 14 is a schematic diagram of step S22c in the flowchart of the method for manufacturing a display panel according to the third embodiment of the present application;

[0068] Figure 15 is a schematic diagram of step S21d in the flowchart of the method for manufacturing a display panel according to the fourth embodiment of the present application;

[0069] Figure 16 is a schematic diagram of step S22d in the flowchart of the method for manufacturing a display panel according to the fourth embodiment of the present application;

[0070] Figure 17 is a schematic diagram of the display panel of the present application. DETAILED DESCRIPTION

[0071] The meanings of the terms used in this specification and claims correspond to those commonly understood by persons of ordinary skill in the art to which this application belongs. The terms used in this specification and claims are intended solely to facilitate the description and understanding of this application and are not intended to limit this application to the narrow interpretations of the specific terms used in the specification and claims.

[0072] See also Figure 1 , the manufacturing method of the conventional display panel 100a includes the following steps:

[0073] Step K1: Provide a display substrate 10a, which includes a driving substrate 11a and a light-emitting device layer 12a. The light-emitting device layer 12a is arranged on the middle part 111a of the driving substrate 11a, and a step is formed between the light-emitting device layer 12a and the part 112a of the driving substrate 11a not covered by the light-emitting device layer 12a.

[0074] Step K2: forming a plurality of fillers spaced apart on one side of the cover plate 20 a .

[0075] Step K3: Laminating the cover plate 20a and the display substrate 10a. After lamination, a filler is filled between the cover plate 20a and the display substrate 10a to form a filling layer 30a. A first portion of the filling layer 30a is located between the light-emitting device layer 12a and the cover plate 20a, and a second portion of the filling layer 30a is located between the portion 112a of the drive substrate 11a not covered by the light-emitting device layer and the cover plate 20a.

[0076] See also Figure 1 In step K3 of the conventional method for manufacturing the display panel 100a, during the lamination process, the light-emitting device layer 12a and the portion of the driving substrate 11a not covered by the light-emitting device layer 12a form a clearance area CA. Because the filler is uniformly disposed in step K2, the filler located in the clearance area in step K3 cannot completely fill the clearance area CA, causing the filler located above the light-emitting device layer 12a to diffuse into the clearance area CA. After the filling layer 30a is formed, the thickness of the filling layer 30a located above the light-emitting device layer 12a is uneven. That is, the middle thickness d2 of the filling layer 30a located above the light-emitting device layer 12a is relatively thick, while the edge thickness d1 of the filling layer 30a located above the light-emitting device layer 12a is relatively thin, with d1 being smaller than d2. The thinner edge thickness of the filling layer 30a located above the light-emitting device layer 12a is due to the fact that, during the lamination process, the filler located at the edge diffuses into the clearance area CA.

[0077] In the conventional display panel 100a, the middle thickness d2 of the filling layer 30a above the light emitting device layer 12a is relatively thick, and the edge thickness d1 of the filling layer 30a above the light emitting device layer 12a is relatively thin, resulting in uneven thickness of the filling layer 30a above the light emitting device layer 12a, which may cause the display panel to be as follows: Figure 2 The white W phenomenon around the display area shown affects the display effect.

[0078] See also Figure 3 The present application provides a method for manufacturing a display panel 100. The display panel 100 may be a micro light emitting diode (Micro LED) display panel 100, a sub-millimeter light emitting diode (Mini LED) display panel 100, or an organic light emitting diode (OLED) display panel 100. In the present application, the display panel 100 is described using an organic light emitting diode display panel 100 as an example.

[0079] The manufacturing method of the display panel 100 of the present application includes the following steps:

[0080] Step S10: providing a display substrate 10. The display substrate 10 includes a driving substrate 11 and a light emitting device layer 12. The driving substrate 11 includes a middle portion 111 and a peripheral portion 112 surrounding the middle portion 111. The light emitting device layer 12 is disposed on the middle portion 111.

[0081] See also Figure 4 In step S10, the step of providing a display substrate 10 includes:

[0082] S11: providing a driving substrate 11, wherein the driving substrate 11 includes a stacked substrate, a thin film transistor device layer, and a planarization layer.

[0083] Optionally, the substrate is a flexible substrate, and the material of the substrate includes polyimide.

[0084] Optionally, the substrate is a hard substrate, and the material of the substrate includes glass.

[0085] Optionally, the thin film transistor device layer includes a plurality of driving thin film transistors arranged on the substrate and an insulating layer covering the driving thin film transistors.

[0086] Optionally, the planarization layer covers the insulating layer to improve the planarity of the film layer above the driving substrate 11 .

[0087] S12: forming a light emitting device layer 12 on the driving substrate 11, the light emitting device layer 12 including a pixel definition layer, a plurality of light emitting devices and an encapsulation layer. The light emitting devices include red light emitting devices, green light emitting devices and blue light emitting devices.

[0088] Optionally, the pixel definition layer is provided with a plurality of pixel openings, and the light-emitting devices are provided in the pixel openings.

[0089] Optionally, the light-emitting device layer 12 includes an anode, a hole injection layer, a hole transport layer, an organic light-emitting layer, an electron transport layer, and a cathode layer.

[0090] Optionally, in step S12, a plurality of anodes are first formed on the planarization layer, and then a pixel definition layer is formed on the planarization layer. The pixel definition layer is patterned to form pixel openings in the pixel definition layer, where each pixel opening exposes one anode layer.

[0091] Optionally, after forming the pixel opening, the upper surface of the anode layer exposed to the pixel opening is pre-treated to remove foreign particles on the upper surface of the anode layer. Then, the hole injection layer, the hole transport layer, and the organic light-emitting layer are formed simultaneously on the upper surface of the anode layer by inkjet printing.

[0092] Optionally, after the organic light-emitting layer is formed, an electron transport layer and a cathode layer are sequentially formed on the organic light-emitting layer by an evaporation method.

[0093] Optionally, after forming the cathode layer, an encapsulation layer is formed on the cathode layer. The encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer.

[0094] Optionally, a chemical vapor deposition method is used to form the first inorganic encapsulation layer on the cathode layer.

[0095] Optionally, the organic encapsulation layer is formed on the first inorganic encapsulation layer by inkjet printing.

[0096] Optionally, a second inorganic encapsulation layer is formed on the organic encapsulation layer by chemical vapor deposition.

[0097] In step S12 , to prevent external water and oxygen from invading the display panel 100 along the organic encapsulation layer, the organic encapsulation layer is usually only provided in the display area AA.

[0098] Optionally, the peripheral portion 112 of the driving substrate 11 is further provided with a retaining wall structure 13. The first inorganic encapsulation layer and the second inorganic encapsulation layer cover the retaining wall structure 13. The retaining wall structure 13 is used to prevent the organic ink of the organic encapsulation layer located in the display area AA from overflowing.

[0099] Optionally, the retaining wall structure 13 includes a first retaining wall 13a and a second retaining wall 13b. The first retaining wall 13a and the second retaining wall 13b are disposed on the peripheral portion 112, with the first retaining wall 13a located between the light-emitting device layer 12 and the second retaining wall 13b. The first retaining wall 13a and the second retaining wall 13b are spaced apart, and the thickness of the second retaining wall 13b is greater than that of the first retaining wall 13a.

[0100] Step S20: Form multiple spaced-apart filling droplets 23 on one side of the cover plate 20. The cover plate 20 includes a main body 21 and an edge portion 22 surrounding the main body 21. The volume of the filling droplets 23 per unit area on the main body 21 is smaller than the volume of the filling droplets 23 per unit area on the edge portion 22.

[0101] See also Figure 5 In step S20, in order to make the volume of the filling droplets 23 per unit area on the main body 21 smaller than the volume of the filling droplets 23 per unit area on the edge portion 22, this can be achieved by increasing the number of filling droplets 23 per unit area on the edge portion 22, or by increasing the volume of a single filling droplet 23 on the edge portion 22.

[0102] Optionally, step S20: before forming a plurality of spaced filling droplets 23 on one side of the cover plate 20, further includes forming a color filter layer on one side of the cover plate 20. The color filter layer includes a black matrix layer and a color filter block. The black matrix layer is provided on the main body 21, and the black matrix layer is provided with a plurality of openings, and one opening is filled with a color filter block. The color filter block includes a red filter block, a green filter block, and a blue filter block. Red filter block. The red filter block corresponds to the red light emitting device, the green filter block corresponds to the green light emitting device, and the blue filter block corresponds to the blue light emitting device.

[0103] After the color filter layer is formed, filling droplets 23 are formed on the color filter layer and on the portion of the cover plate 20 not covered by the color filter layer.

[0104] Optional, see Figure 6 , a syringe T1 can be used to form a filling droplet 23. For details, please refer to Figure 6 The filling droplet 23 is squeezed into the syringe T1 by pressure N. The piston rod T2 of the syringe T1 is fixed to the motor moving shaft driven by the servo motor T3 with a screw, and can move up and down to control the suction and discharge of the syringe T1. The model of the servo motor T3 can be an MPP servo motor T3.

[0105] The process of syringe T1 discharging filling droplet 23 includes: opening the three-way solenoid valve T4 from syringe T1 to nozzle T5, allowing filling droplet 23 to be discharged from nozzle T5. The process of syringe T1 drawing filling droplet 23 includes: opening the channel from liquid supply tube T6 to syringe T1, allowing filling droplet 23 to be squeezed into syringe T1 by the upward movement of the piston.

[0106] It should be understood that the weight of the filling droplet 23 is controlled by the number of servo pulses of the servo motor T3 . The greater the number of pulses, the further the piston rod T2 descends, and the greater the weight of the filling droplet 23 .

[0107] Syringe T1 also requires regular measurement and calibration. Specifically, add 50 drops of filling liquid 23 to beaker T7, weigh the weight using a high-precision balance T8, and compare the average weight with the set single drop filling liquid 23. If the comparison result is too high, the servo drive pulse count is corrected in the negative direction. If the comparison result is too low, the servo drive pulse count is corrected in the positive direction.

[0108] Optionally, before step S30, the following steps are further included:

[0109] A frame adhesive 40 is formed on the edge portion 22. The frame adhesive 40 surrounds the periphery of the plurality of spaced filling droplets 23. The frame adhesive 40 is used to connect the cover plate 20 and the display substrate 10.

[0110] Optionally, after the filling droplets 23 and the frame glue 40 are formed on the cover plate 20 , the cover plate 20 is irradiated with ultraviolet light to cause the frame glue 40 and the filling droplets 23 to begin to harden, but not completely harden.

[0111] Step S30: Laminating the cover plate 20 to the display substrate 10. After lamination, the filling droplets 23 are filled between the display substrate 10 and the cover plate 20, forming a filling layer 30. A first portion of the filling layer 30 is located between the light-emitting device layer 12 and the main body 21. A second portion of the filling layer 30 is located between the peripheral portion 112 and the edge portion 22. The thickness d3 of the first portion of the filling layer 30 is less than the thickness d4 of the second portion of the filling layer 30.

[0112] Since in step S20, the volume of the filling droplet 23 per unit area on the edge portion 22 is greater than the volume of the filling droplet 23 per unit area on the main body portion 21, please refer to Figure 7 In step S30, the excess filling droplets 23 on the edge portion 22 can fill the clearance area CA and form a filling layer 30. This prevents the filling droplets 23 on the light-emitting device layer 12 from spreading toward the peripheral portion 112, improves the thickness uniformity of the filling layer 30 formed between the light-emitting device layer 12 and the main body 21, eliminates the whitening phenomenon around the display area AA of the display panel 100, and improves the display effect.

[0113] Optional, see Figure 8 The cover plate 20 and the display substrate 10 are pressed together under vacuum. Before pressing, the cover plate 20 and the display substrate 10 are placed in a vacuum laminating machine T9. The vacuum laminating machine T9 includes a first pressing plate T10 and a second pressing plate T11. The cover plate 20 is placed on the first pressing plate T10, and the second pressing plate T11 is pressed against the display substrate 10. During the pressing process, the vacuum laminating machine T9 draws a vacuum and applies pressure to the second pressing plate T11, completing the pressing of the cover plate 20 and the display substrate 10.

[0114] Optionally, after the cover plate 20 and the actual substrate are pressed together, the frame glue 40 and the filling droplets 23 are completely hardened by heating, and the filling droplets 23 form a filling layer 30 after hardening.

[0115] In the method for manufacturing the display panel 100 of the present application, during the step of forming a plurality of spaced-apart filler droplets 23 on one side of the cover plate 20, the filler droplets 23 on the main body 21 and the filler droplets 23 on the edge portion 22 are arranged differently to increase the volume of the filler droplets 23 on the edge portion 22, thereby reducing the volume of the filler droplets 23 per unit area on the main body 21 compared to the volume of the filler droplets 23 per unit area on the edge portion 22. In the subsequent step of laminating the cover plate 20 to the display substrate 10, the filler droplets 23 added to the edge portion 22 diffuse into the clearance area CA formed by the step difference between the light-emitting device layer 12 and the peripheral portion 112 of the drive substrate 11. This reduces the diffusion of the filler droplets 23 between the light-emitting device layer 12 and the main body 21 into the clearance area CA, ensuring a uniform thickness of the filler layer 30 formed between the light-emitting device layer 12 and the main body 21, eliminating the whitening phenomenon around the display area AA of the display panel 100, and improving the display effect.

[0116] In the first embodiment of the present application:

[0117] Optionally, the filling liquid droplet 23 includes a first filling liquid droplet 23a and a second filling liquid droplet 23b.

[0118] Optionally, the volume of the first filling liquid droplet 23a is smaller than or equal to the volume of the second filling liquid droplet 23b.

[0119] Step S20: forming a plurality of spaced filling droplets 23 on one side of the cover plate 20 includes the following steps:

[0120] S21 a : forming a plurality of first filling liquid droplets 23 a spaced apart from each other on the main body 21 and the edge 22 .

[0121] See also Figure 9In step S21 a , a plurality of first filling liquid droplets 23 a arranged in an array are formed on the main body 21 and the edge portion 22 .

[0122] S22a: A plurality of second filling liquid drops 23b are formed on the edge portion 22. The second filling liquid drops 23b are spaced apart from the first filling liquid drops 23a. The volume of the first filling liquid drops 23a per unit area on the main body 21 is smaller than the volume of the first filling liquid drops 23a and the second filling liquid drops 23b per unit area on the edge portion 22.

[0123] See also Figure 10 In step S22a, a plurality of second filling liquid droplets 23b are formed on the edge portion 22 at intervals, and one second filling liquid droplet 23b is located between two adjacent first filling liquid droplets 23a.

[0124] In the first embodiment of the present application, a plurality of second filling droplets 23b are formed on the edge portion 22 in step S22a, and the number of filling droplets 23 on the main body 21 and the number of filling droplets 23 on the edge portion 22 are differentiated, so that the volume of the filling droplets 23 per unit area on the main body 21 is smaller than the volume of the filling droplets 23 per unit area on the edge portion 22. In the subsequent step of laminating the cover plate 20 to the display substrate 10, the additional filling droplets 23 on the edge portion 22 diffuse into the clearance area CA formed by the step difference between the light-emitting device layer 12 and the peripheral portion 112 of the drive substrate 11, thereby reducing the diffusion of filling droplets 23 between the light-emitting device layer 12 and the main body 21 into the clearance area CA, making the thickness of the filling layer 30 formed between the light-emitting device layer 12 and the main body 21 uniform, eliminating the whitening phenomenon around the display area AA of the display panel 100, and improving the display effect.

[0125] In the second embodiment of the present application:

[0126] In order to avoid redundancy, the second embodiment of the present application will describe parts that are different from the first embodiment of the present application.

[0127] The second embodiment of the present application is different from the first embodiment of the present application in that:

[0128] Optionally, the filling liquid droplet 23 includes a first filling liquid droplet 23a and a second filling liquid droplet 23b.

[0129] Optionally, the volume of the first filling liquid droplet 23a is smaller than or equal to the volume of the second filling liquid droplet 23b.

[0130] Optionally, the second filling droplet 23b includes a first sub-droplet 23b1 and a second sub-droplet 23b2.

[0131] Step S20: forming a plurality of spaced filling droplets 23 on one side of the cover plate 20 includes the following steps:

[0132] S21b: A plurality of first filling droplets 23a are formed on the main body 21 and the edge portion 22 at intervals, wherein the volume of the first filling droplet 23a per unit area on the main body 21 is equal to the volume of the first filling droplet 23a per unit area on the edge portion 22.

[0133] See also Figure 11 In step S21b, a plurality of first droplet columns 25a and a plurality of second droplet columns 25b are formed on the main body 21 and the edge portion 22. The first droplet columns 25a include a plurality of first filling droplets 23a spaced apart along the first direction Y. The second droplet columns 25b include a plurality of first filling droplets 23a spaced apart along the first direction Y. The first droplet columns 25a and the second droplet columns 25b are alternately arranged along the second direction X. The second direction X intersects the first direction Y. The first filling droplets 23a in the first droplet columns 25a and the first filling droplets 23a in the second droplet columns 25b are alternately arranged along the first direction Y.

[0134] The staggered arrangement of the first droplet columns 25a and the second droplet columns 25b can stagger the first filling droplets 23a in the odd-numbered columns and the first filling droplets 23a in the even-numbered columns, which is beneficial for the diffusion of the filling droplets 23 during the lamination process.

[0135] In a conventional syringe T1 , all filling droplets 23 can only be set to the same volume, and the volume of a single filling droplet 23 cannot be differentially adjusted, resulting in the conventional clearance area CA being unable to be filled with the filling droplets 23 .

[0136] S22b: A plurality of second filling liquid drops 23b are formed at intervals on the edge portion 22. The second filling liquid drops 23b are spaced apart from the first filling liquid drops 23a.

[0137] See also Figure 12 , in step S22b, including:

[0138] S22b1: forming a first sub-droplet 23b1 between two adjacent first filling droplets 23a spaced apart along the first direction Y on the edge portion 22.

[0139] S22b2: forming a second sub-droplet 23b2 between two adjacent first filling droplets 23a arranged along the second direction X on the edge portion 22 .

[0140] In the second embodiment of the present application, a plurality of first sub-droplets 23b1 and second sub-droplets 23b2 are formed on the edge portion 22 in step S22b, and the number of filling droplets 23 on the main body 21 and the number of filling droplets 23 on the edge portion 22 are differentially set, so that the volume of filling droplets 23 per unit area on the main body 21 is smaller than the volume of filling droplets 23 per unit area on the edge portion 22. In the subsequent step of laminating the cover plate 20 to the display substrate 10, the additional filling droplets 23 on the edge portion 22 diffuse into the clearance area CA formed by the step difference between the light-emitting device layer 12 and the peripheral portion 112 of the drive substrate 11, thereby reducing the diffusion of filling droplets 23 between the light-emitting device layer 12 and the main body 21 into the clearance area CA, making the thickness of the filling layer 30 formed between the light-emitting device layer 12 and the main body 21 uniform, eliminating the whitening phenomenon around the display area AA of the display panel 100, and improving the display effect.

[0141] Optionally, in step S22b1, the following steps are included:

[0142] A first sub-droplet 23b1 is formed between two adjacent first filling droplets 23a spaced apart along the first direction Y on the edge portion 22. The first sub-droplet 23b1 is spaced equal to the spacing between the two adjacent first filling droplets 23a along the first direction Y. The volume of the first sub-droplet 23b1 is equal to the volume of the first filling droplet 23a.

[0143] In step S22b1, by arranging the first sub-droplet 23b1 and the two adjacent first filling droplets 23a at equal intervals, it is beneficial to improve the diffusion speed of the filling droplet 23 on the edge portion 22 during the pressing process, thereby improving the uniformity of the overall thickness of the display panel 100 and improving the display effect.

[0144] Optionally, in step S22b2, the following steps are included:

[0145] A second sub-droplet 23b2 is formed between two adjacent first filling droplets 23a arranged along the second direction X on the edge portion 22. The second sub-droplet 23b2 is spaced equidistant from the two adjacent first filling droplets 23a along the second direction X. The volume of the second sub-droplet 23b2 is the same as that of the first filling droplet 23a.

[0146] In step S22b1, by arranging the second sub-droplet 23b2 at equal intervals from the two adjacent first filling droplets 23a, it is beneficial to increase the diffusion speed of the filling droplet 23 on the edge portion 22 during the lamination process, thereby improving the uniformity of the overall thickness of the display panel 100 and improving the display effect.

[0147] In the third embodiment of the present application:

[0148] In order to avoid redundancy, the third embodiment of the present application will describe parts that are different from the first embodiment of the present application.

[0149] The third embodiment of the present application is different from the first embodiment of the present application in that:

[0150] Optionally, the filling liquid drop 23 includes a first filling liquid drop 23a and a second filling liquid drop 23b. The volume of the second filling liquid drop 23b is greater than that of the first filling liquid drop 23a.

[0151] The second filling droplet 23b includes a first sub-droplet 23b1 and a second sub-droplet 23b2. The volume of the first sub-droplet 23b1 is smaller than that of the second sub-droplet 23b2.

[0152] In the present application, the device software of the syringe T1 can be modified, and the number of servo drive pulses can be set differently according to the volume of different filling droplets 23. The second filling droplet 23b with a large volume corresponds to a large number of servo drive pulses, and the first filling droplet 23a with a small volume corresponds to a small number of servo drive pulses. The volume of the filling droplets 23 in different areas can be adjusted quickly and conveniently, thereby improving the uniformity of the overall film thickness of the display panel 100.

[0153] Optionally, the ratio of the volume of the second filling liquid droplet 23b to the volume of the first filling liquid droplet 23a is in the range of 1.1 to 2.0.

[0154] The ratio of the volume of the first sub-droplet 23b1 to the first filling droplet 23a is in the range of 1.1 to 1.4. The ratio of the first sub-droplet 23b1 to the first filling droplet 23a is one of 1.10, 1.11, 1.12, 1.13, 1.14, 1.15, 1.16, 1.17, 1.18, 1.19, 1.20, 1.21, 1.22, 1.23, 1.24, 1.25, 1.26, 1.27, 1.28, 1.29, 1.30, 1.31, 1.32, 1.33, 1.34, 1.35, 1.36, 1.37, 1.38, 1.38, and 1.40.

[0155] The ratio of the second sub-droplet 23b2 to the first filling droplet 23a is greater than 1.4, and the ratio of the second sub-droplet 23b2 to the first filling droplet 23a is less than or equal to 2.0. The ratio of the second sub-droplet 23b2 to the first filling droplet 23a is 1.41, 1.42, 1.43, 1.44, 1.45, 1.46, 1.47, 1.48, 1.49, 1.50, 1.51, 1.52, 1.53, 1.54, 1.55, 1.56, 1.57, 1.58, 1.59, 1.60, 1.61, 1.62, 1.63, 1.64, 1.65, 1.66, 1.67, 1.68 , 1.69, 1.70, 1.71, 1.72, 1.73, 1.74, 1.75, 1.76, 1.77, 1.78, 1.79, 1.80, 1.81, 1.82, 1.83, 1.84, 1.85, 1.86, 1.87, 1.88, 1.89, 1.90, 1.91, 1.92, 1.93, 1.94, 1.95, 1.96, 1.97, 1.98, 1.99, or 2.0.

[0156] Preferably, the ratio of the volume of the first sub-droplet 23b1 to the first filling droplet 23a is in the range of 1.1 to 1.3, and the ratio of the volume of the second sub-droplet 23b2 to the first filling droplet 23a is in the range of 1.4 to 1.6, which has a better effect on improving the thickness uniformity of the display panel 100.

[0157] Step S20: forming a plurality of spaced filling droplets 23 on one side of the cover plate 20 includes the following steps:

[0158] S21c: forming a plurality of first filling liquid droplets 23a spaced apart from each other on the main body 21 .

[0159] See also Figure 13 In step S21c, a plurality of first filling liquid droplets 23a arranged in an array are formed on the main body 21.

[0160] S22c: forming a plurality of second filling liquid droplets 23b spaced apart on the edge portion 22. The volume of the first filling liquid droplet 23a per unit area on the main body 21 is smaller than the volume of the second filling liquid droplet 23b per unit area on the edge portion 22.

[0161] See also Figure 14In step S22c, multiple first sub-droplets 23b1 and multiple second sub-droplets 23b2 are formed on the edge portion 22. The multiple first sub-droplets 23b1 are arranged around the multiple first filling droplets 23a on the main body 21. The multiple second sub-droplets 23b2 are arranged around the multiple first sub-droplets 23b1. The volume of the first sub-droplets 23b1 is smaller than the volume of the second sub-droplets 23b2. The volume of the first sub-droplets 23b1 per unit area on the edge portion 22 is smaller than the volume of the second sub-droplets 23b2 per unit area on the edge portion 22.

[0162] In the third embodiment of the present application, a plurality of first sub-droplets 23b1 and second sub-droplets 23b2 are formed on the edge portion 22 in step S22c. The volumes of the first filling droplets 23a on the main body 21 and the second filling droplets 23b on the edge portion 22 are differentiated, such that the volume of the filling droplets 23 per unit area on the main body 21 is smaller than the volume of the filling droplets 23 per unit area on the edge portion 22. In the subsequent step of laminating the cover plate 20 to the display substrate 10, the larger second filling droplets 23b on the edge portion 22 can directly fill the clearance area CA formed by the step difference between the light-emitting device layer 12 and the peripheral portion 112 of the drive substrate 11. This reduces the diffusion of the first filling droplets 23a between the light-emitting device layer 12 and the main body 21 into the clearance area CA, ensuring a uniform thickness of the filling layer 30 formed between the light-emitting device layer 12 and the main body 21, eliminating the whitening phenomenon around the display area AA of the display panel 100, and improving the display effect.

[0163] In the fourth embodiment of the present application:

[0164] In order to avoid redundancy, the fourth embodiment of the present application will describe parts that are different from the third embodiment of the present application.

[0165] The fourth embodiment of the present application is different from the third embodiment of the present application in that:

[0166] Optionally, the filling liquid droplet 23 includes a first filling liquid droplet 23a and a second filling liquid droplet 23b.

[0167] Optionally, the volume of the second filling liquid drop 23b is greater than the volume of the first filling liquid drop 23a.

[0168] Optionally, the second filling droplet 23b includes a first sub-droplet 23b1 and a second sub-droplet 23b2.

[0169] Optionally, the volume of the first filling droplet 23 a is smaller than the volume of the first sub-droplet 23 b 1 .

[0170] Optionally, the volume of the first sub-droplet 23b1 is smaller than the volume of the second sub-droplet 23b2.

[0171] Optionally, the edge portion 22 includes a first peripheral region 22a and a second peripheral region 22b. The first peripheral region 22a is disposed around the periphery of the main body portion 21. The second peripheral region 22b is disposed around the periphery of the first peripheral region 22a.

[0172] Optionally, the first peripheral area includes two first sub-portions 22a1 and two second sub-portions 22a2. The two first sub-portions 22a1 are located on either side of the main portion 21 in the first direction Y, and the two second sub-portions 22a2 are located on either side of the main portion 21 in the second direction X. The first direction intersects the second direction, and the two first sub-portions 22a1 and the two second sub-portions 22a2 form the first peripheral area 22a.

[0173] Optionally, the second peripheral area 22b includes two third sub-parts 22b1 and two fourth sub-parts 22b2, the two third sub-parts 22b1 are respectively located on the side of the two first sub-parts 22a1 away from the main body 21, and the two fourth sub-parts 22b2 are respectively located on the side of the two second sub-parts 22a2 away from the main body 21, and the two third sub-parts 22b1 and the two fourth sub-parts 22b2 form the second peripheral area 22b.

[0174] Step S20: forming a plurality of spaced filling droplets 23 on one side of the cover plate 20 includes the following steps:

[0175] S21d: forming a plurality of first filling liquid droplets 23a spaced apart from each other on the main body 21 .

[0176] See also Figure 15 In step S21d, a plurality of first liquid droplet columns 25a and a plurality of second liquid droplet columns 25b are formed on the main body 21. The first liquid droplet columns 25a include a plurality of first filling liquid droplets 23a spaced apart along the first direction Y, and the second liquid droplet columns 25b include a plurality of first filling liquid droplets 23a spaced apart along the first direction Y. The first liquid droplet columns 25a and the second liquid droplet columns 25b are alternately arranged along the second direction X, which intersects the first direction Y. The first filling liquid droplets 23a in the first liquid droplet columns 25a and the first filling liquid droplets 23a in the second liquid droplet columns 25b are staggered in the first direction Y.

[0177] The staggered arrangement of the first droplet columns 25a and the second droplet columns 25b can stagger the first filling droplets 23a in the odd-numbered columns and the first filling droplets 23a in the even-numbered columns, which is beneficial for the diffusion of the filling droplets 23 during the lamination process.

[0178] S22d: forming a plurality of second filling liquid droplets 23b spaced apart on the edge portion 22 , wherein the volume of the first filling liquid droplet 23a per unit area on the main body 21 is smaller than the volume of the second filling liquid droplet 23b per unit area on the edge portion 22 .

[0179] See also Figure 16 , step S22d includes:

[0180] Step S22d1: forming a plurality of first sub-droplets 23b1 spaced apart from each other on the first peripheral region 22a.

[0181] Step S22d2: forming a plurality of second sub-droplets 23b2 spaced apart on the second peripheral region 22b, wherein the volume of the first sub-droplet 23b1 per unit area on the first peripheral region 22a is smaller than the volume of the second sub-droplet 23b2 per unit area on the second peripheral region 22b.

[0182] In the fourth embodiment of the present application, a plurality of first sub-droplets 23b1 are formed on the first peripheral area 22a and a plurality of second sub-droplets 23b2 are formed on the second peripheral area 22b through step S22d, and the volume of the first filling droplet 23a on the main body 21, the volume of the first sub-droplet 23b1 on the first peripheral area 22a, and the volume of the second sub-droplet 23b2 on the second peripheral area 22b are differentiated, so that the volume of the filling droplet 23 per unit area on the main body 21 is smaller than the volume of the filling droplet 23 per unit area on the first peripheral area 22a, and the volume of the filling droplet 23 per unit area on the first peripheral area 22a is smaller than the volume of the filling droplet 23 per unit area on the second peripheral area 22b. In the subsequent step of laminating the cover plate 20 to the display substrate 10, the larger second sub-droplet 23b2 in the second peripheral region 22b can directly fill the clearance area CA formed by the step difference between the light-emitting device layer 12 and the peripheral portion 112 of the drive substrate 11. This reduces the diffusion of the first filling droplet 23a between the light-emitting device layer 12 and the main body 21 into the clearance area CA, making the thickness of the filling layer 30 formed between the light-emitting device layer 12 and the main body 21 uniform, eliminating the whitening phenomenon around the display area AA of the display panel 100, and improving the display effect. The first sub-droplet 23b1 with a moderate volume in the first peripheral region 22a can diffuse into the second peripheral region 22b to fill the clearance area CA, while also preventing some of the second filling liquid from diffusing into the space between the light-emitting device layer 12 and the main body 21 before filling the clearance area CA. This makes the thickness of the edge portion 22 of the filling layer 30 above the light-emitting device layer 12 greater than the thickness of the center portion of the filling layer 30, thereby improving the flatness of the filling layer 30 above the light-emitting device layer 12.

[0183] Optionally, the number of first sub-droplets 23b1 per unit area in the first peripheral region 22a is less than or equal to the number of second sub-droplets 23b2 per unit area in the second peripheral region 22b. When the volume of the clearance area CA is large, the number of filling droplets 23 in the second peripheral region can be increased to further improve the display effect.

[0184] Optional, see Figure 16 , step S22d1 includes:

[0185] The step of forming a plurality of first sub-droplets 23b1 spaced apart on the first peripheral area 22a includes:

[0186] A first sub-row 26 a is formed on the first sub-portion 22 a 1 . The first sub-row 26 a includes a plurality of first sub-liquid droplets 23 b 1 spaced apart along the second direction X.

[0187] A first sub-column 25c1 is formed on the second sub-portion 22a2. The first sub-column 25c1 includes a plurality of first sub-liquid droplets 23b1 spaced apart along the first direction Y.

[0188] Step S22d2 includes:

[0189] A second sub-row 26b is formed on the third sub-portion 22b1. The second sub-row 26b includes a plurality of second sub-droplets 23b2 spaced apart along the second direction X. The second sub-droplets 23b2 of the second sub-row 26b are staggered in the second direction X with the first sub-droplets 23b1 of the first sub-row 26a.

[0190] A second sub-column 25c2 is formed on the fourth sub-portion 22b2. The second sub-column 25c2 includes a plurality of second sub-droplets 23b2 spaced apart along the first direction Y. The second sub-droplets 23b2 of the second sub-column 25c2 are staggered with the first sub-droplets 23b1 of the first sub-column 25c1 in the first direction Y.

[0191] The staggered droplet coating method of the first sub-row 26a and the second sub-row 26b can increase the diffusion speed of the first sub-droplet 23b1 and the second sub-droplet 23b2 at the junction of the first peripheral area 22a and the second peripheral area 22b during the pressing process, which is beneficial to the diffusion of the filling droplet 23.

[0192] The staggered arrangement of the first sub-row 25c1 and the second sub-row 25c2 in the droplet coating method can increase the diffusion speed of the first sub-droplet 23b1 and the second sub-droplet 23b2 at the junction of the first peripheral area 22a and the second peripheral area 22b during the pressing process, which is beneficial to the diffusion of the filling droplet 23.

[0193] This application proposes a display device. The display device can be a mobile phone, tablet computer, e-reader, electronic display screen, laptop computer, augmented reality (AR) or virtual reality (VR) device, media player, wearable device, digital camera, car navigation system, etc. The display device includes a display panel 100.

[0194] See also Figure 17 The present application provides a display panel 100. The display panel 100 may be a micro light emitting diode (Micro LED) display panel 100, a sub-millimeter light emitting diode (Mini LED) display panel 100, or an organic light emitting diode (OLED) display panel 100. In the present application, the display panel 100 is described using an organic light emitting diode display panel 100 as an example.

[0195] The display panel 100 of the present application is manufactured using the manufacturing method of the display panel 100 proposed in the present application.

[0196] The display panel 100 of the present application includes a display substrate 10, a cover plate 20, and a filling layer 30. The display substrate 10 includes a driving substrate 11 and a light-emitting device layer 12. The driving substrate 11 includes a middle portion 111 and a peripheral portion 112 arranged around the periphery of the middle portion 111. The light-emitting device layer 12 is arranged on the middle portion 111. The cover plate 20 is arranged opposite to the display substrate 10. The cover plate 20 includes a main body 21 and an edge portion 22 arranged around the periphery of the main body 21. The filling layer 30 is filled between the display substrate 10 and the cover plate 20. The first portion of the filling layer 30 is located between the light-emitting device layer 12 and the main body 21. The second portion of the filling layer 30 is located between the peripheral portion 112 and the edge portion 22. The thickness d3 of the first portion of the filling layer 30 is less than the thickness d4 of the second portion of the filling layer 30.

[0197] In the display panel 100 formed by the manufacturing method of the display panel 100 proposed in the present application, the uniformity of the thickness of the first part of the filling layer 30 can be improved, so that the thickness of the filling layer 30 formed between the light-emitting device layer 12 and the main body 21 is uniform, eliminating the whitening phenomenon around the display area AA of the display panel 100, and improving the display effect.

[0198] Optionally, the peripheral portion 112 of the driving substrate 11 is further provided with a retaining wall structure 13. The first inorganic encapsulation layer and the second inorganic encapsulation layer cover the retaining wall structure 13. The retaining wall structure 13 is used to prevent the organic ink of the organic encapsulation layer located in the display area AA from overflowing.

[0199] Optionally, the retaining wall structure 13 includes a first retaining wall 13a and a second retaining wall 13b. The first retaining wall 13a and the second retaining wall 13b are disposed on the peripheral portion 112, with the first retaining wall 13a located between the light-emitting device layer 12 and the second retaining wall 13b. The first retaining wall 13a and the second retaining wall 13b are spaced apart, and the thickness of the second retaining wall 13b is greater than that of the first retaining wall 13a. The space between the first retaining wall 13a and the second retaining wall 13b is used to store excess organic ink.

[0200] The above describes in detail the specific embodiments of the present application. The above embodiments disclosed in this application are merely preferred embodiments of the present application. Those skilled in the art will appreciate that many variations and improvements can be made without departing from the spirit of the present application. These variations and improvements fall within the scope of protection defined by the claims of this application.

Claims

1. A method for manufacturing a display panel, characterized in that: The following steps are involved: A display substrate is provided, the display substrate comprising a driving substrate and a light-emitting device layer, the driving substrate comprising a middle portion and a peripheral portion surrounding the middle portion, the light-emitting device layer being disposed on the middle portion; A plurality of filling droplets are formed on one side of the cover plate, the cover plate comprising a main body and an edge portion surrounding the main body, wherein a volume of the filling droplets per unit area on the main body is smaller than a volume of the filling droplets per unit area on the edge portion; The cover plate is pressed together with the display substrate. After pressing together, the filling droplets are filled between the display substrate and the cover plate to form a filling layer. The first part of the filling layer is located between the light-emitting device layer and the main body, and the second part of the filling layer is located between the peripheral part and the edge part. The thickness of the first part of the filling layer is less than the thickness of the second part of the filling layer.

2. The method for manufacturing a display panel according to claim 1, wherein: The filling droplets include a first filling droplet and a second filling droplet, and the step of forming a plurality of filling droplets spaced apart on one side of the cover plate includes: forming a plurality of first filling liquid droplets spaced apart from each other on the main body and the edge portion, wherein the volume of the first filling liquid droplets per unit area on the main body is equal to the volume of the first filling liquid droplets per unit area on the edge portion; A plurality of second filling liquid drops are formed on the edge portion and are spaced apart from each other. The second filling liquid drops are spaced apart from the first filling liquid drops.

3. The method for manufacturing a display panel according to claim 2, wherein: The step of forming a plurality of first filling droplets spaced apart on the main body and the edge comprises: A plurality of first liquid droplet columns and a plurality of second liquid droplet columns are formed on the main body and the edge portion, the first liquid droplet column includes a plurality of first filling liquid droplets spaced apart along a first direction, the second liquid droplet column includes a plurality of first filling liquid droplets spaced apart along the first direction, the first liquid droplet columns and the second liquid droplet columns are alternately arranged along a second direction, the second direction intersects with the first direction, and the first filling liquid droplets of the first liquid droplet column and the first filling liquid droplets of the second droplet column are staggered in the first direction.

4. The method for manufacturing a display panel according to claim 3, wherein: The second filling droplet includes a first sub-droplet and a second sub-droplet, and the step of forming a plurality of second filling droplets spaced apart on the edge portion includes: A first sub-droplet is formed between two adjacent first filling droplets spaced apart along the first direction on the edge portion, and a second sub-droplet is formed between two adjacent first filling droplets arranged along the second direction on the edge portion.

5. The method for manufacturing a display panel according to claim 4, wherein: The step of forming a first sub-droplet between two adjacent first filling droplets spaced apart along the first direction on the edge portion comprises: forming a first sub-droplet between two adjacent first filling droplets spaced apart along the first direction on the edge portion, wherein the first sub-droplet is spaced equidistant from the two adjacent first filling droplets along the first direction, and the volume of the first sub-droplet is equal to the volume of the first filling droplet; The step of forming a second sub-droplet between two adjacent first filling droplets arranged along the second direction on the edge portion includes: A second sub-droplet is formed between two adjacent first filling droplets arranged along the second direction on the edge portion, the second sub-droplet is spaced equidistant from the two adjacent first filling droplets along the second direction, and the volume of the second sub-droplet is the same as that of the first filling droplet.

6. The method for manufacturing a display panel according to claim 2, wherein: The step of forming a plurality of first filling droplets spaced apart on the main body and the edge comprises: forming a plurality of first filling droplets arranged in an array on the main body and the edge portion; The step of forming a plurality of second filling droplets spaced apart on the edge portion comprises: A plurality of second filling liquid drops arranged at intervals are formed on the edge portion, and one second filling liquid drop is located between two adjacent first filling liquid drops.

7. The method for manufacturing a display panel according to claim 1, wherein: The filling droplets include a first filling droplet and a second filling droplet, and the step of forming a plurality of filling droplets spaced apart on one side of the cover plate includes: forming a plurality of the first filling liquid droplets spaced apart on the main body; A plurality of second filling droplets are formed on the edge portion and arranged at intervals, the volume of the second filling droplets is greater than the volume of the first filling droplets, and the volume of the first filling droplets per unit area on the main body is smaller than the volume of the second filling droplets per unit area on the edge portion.

8. The method for manufacturing a display panel according to claim 7, wherein: The edge portion includes a first peripheral area and a second peripheral area, the first peripheral area is arranged around the periphery of the main body portion, and the second peripheral area is arranged around the periphery of the first peripheral area, the second filling droplet includes a first sub-droplet and a second sub-droplet, and the volume of the first sub-droplet is smaller than the volume of the second sub-droplet; the step of forming a plurality of second filling droplets spaced apart on the edge portion includes: forming a plurality of first sub-droplets spaced apart from each other on the first peripheral area; A plurality of second sub-droplets spaced apart from each other are formed on the second peripheral region, and a volume of the first sub-droplet per unit area on the first peripheral region is smaller than a volume of the second sub-droplet per unit area on the second peripheral region.

9. The method for manufacturing a display panel according to claim 8, wherein: The first peripheral area includes two first sub-portions and two second sub-portions, the two first sub-portions are respectively located on both sides of the main portion in a first direction, and the two second sub-portions are respectively located on both sides of the main portion in a second direction, the first direction intersects the second direction, and the two first sub-portions and the two second sub-portions enclose the first peripheral area; The step of forming a plurality of first sub-droplets spaced apart on the first peripheral area comprises: forming a first sub-row on the first sub-portion, wherein the first sub-row includes a plurality of the first sub-droplets spaced apart along the second direction; forming a first sub-column on the second sub-portion, wherein the first sub-column includes a plurality of the first sub-droplets spaced apart along the first direction; The second peripheral area includes two third sub-portions and two fourth sub-portions, the two third sub-portions are respectively located on a side of the two first sub-portions away from the main portion, and the two fourth sub-portions are respectively located on a side of the two second sub-portions away from the main portion, and the two third sub-portions and the two fourth sub-portions enclose the second peripheral area; the step of forming a plurality of second sub-droplets spaced apart on the second peripheral area includes: forming a second sub-row on the third sub-section, the second sub-row comprising a plurality of second sub-droplets spaced apart along the second direction, the second sub-droplets of the second sub-row being staggered with the first sub-droplets of the first sub-row in the second direction; A second sub-column is formed on the fourth sub-portion, the second sub-column comprising a plurality of second sub-droplets spaced apart along the first direction, the second sub-droplets of the second sub-column and the first sub-droplets of the first sub-column being staggered in the first direction.

10. The method for manufacturing a display panel according to claim 7, wherein: The second filling droplet includes a first sub-droplet and a second sub-droplet, the volume of the first sub-droplet is smaller than the volume of the second sub-droplet, and the step of forming a plurality of first filling droplets spaced apart on the main body includes: forming a plurality of the first filling droplets arranged in an array on the main body; The step of forming a plurality of second filling droplets spaced apart on the edge portion comprises: A plurality of first sub-droplets and a plurality of second sub-droplets are formed on the edge portion, the plurality of first sub-droplets are arranged around the periphery of the plurality of first filling droplets located on the main portion, and the plurality of second sub-droplets are arranged around the periphery of the plurality of first sub-droplets, and the volume of the first sub-droplet per unit area on the edge portion is smaller than the volume of the second sub-droplet per unit area on the edge portion.

11. The method for manufacturing a display panel according to any one of claims 1 to 10, wherein: Before the step of pressing the cover plate and the display substrate together, the method further includes: forming a frame glue on the edge portion, wherein the frame glue is disposed around the periphery of a plurality of filling droplets arranged at intervals; The step of pressing the cover plate and the display substrate together comprises: The side of the cover plate provided with the frame glue is pressed together with the side of the driving substrate provided with the light-emitting device layer. After pressing together, the frame glue connects the edge portion and the outer portion. The frame glue, the driving substrate, and the cover plate enclose a space, and the filling droplets are filled in the space to form the filling layer.

12. A display panel, characterized in that: The display panel is manufactured by the method for manufacturing a display panel according to any one of claims 1 to 11, and the display panel comprises: A display substrate, comprising a driving substrate and a light-emitting device layer, wherein the driving substrate comprises a middle portion and a peripheral portion surrounding the middle portion, and the light-emitting device layer is disposed on the middle portion; a cover plate, arranged opposite to the driving substrate, comprising a main body portion and an edge portion surrounding the outer periphery of the main body portion; A filling layer is filled between the display substrate and the cover plate, wherein the first portion of the filling layer is located between the light-emitting device layer and the main body portion, the second portion of the filling layer is located between the peripheral portion and the edge portion, and the thickness of the first portion of the filling layer is less than the thickness of the second portion of the filling layer.

13. A display device, characterized in that: Comprising the display panel as claimed in claim 12.

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