Display panel and manufacturing method thereof, and display device

Abstract

The present application provides a display panel and a preparation method thereof, and a display device. The display panel includes a driving substrate, a test signal line, a liquid storage part, and a protective layer. The driving substrate includes a base plate and a driving circuit. The test signal line is electrically connected to the driving circuit, and the test signal line is used to electrically connect to the test device. The test signal line is also used to be separated from the test device after cutting, and the test signal line after cutting forms an exposed cutting surface. The liquid storage part has a accommodating cavity for accommodating a protective liquid. When the test signal line is cut, the liquid storage part can leak out of the accommodating cavity after cutting, so that the protective liquid flows out. The protective layer covers the cutting surface and is formed by the protective liquid. The present application forms a protective layer covering the cutting surface when the test signal line is cut by setting a liquid storage part, isolating the test signal line from contact with external oxygen and water vapor, reducing the risk of corrosion of the test signal line, thereby reducing the risk of corrosion of the driving circuit, and improving the reliability of the display panel.

Description

Technical Field

[0001] The present application belongs to the technical field of display devices, and specifically relates to a display panel and a preparation method thereof, and a display device. Background Art

[0002] During the preparation of the display panel, the test signal line needs to be connected to the test device to perform electrical tests on the driving circuit of the driving substrate in order to ensure the yield of the display panel. After the electrical test is completed, the test signal line needs to be cut before other electrical components can be bound. However, the test signal line breaks after cutting and forms an exposed cut surface, which is exposed to the air, making the test signal line susceptible to corrosion. As time goes by, the corrosion position will continue to expand into the actual panel, affecting the driving circuit, causing signal abnormalities, and damaging the display panel. Summary of the invention

[0003] In view of this, a first aspect of the present application provides a display panel, the display panel comprising:

[0004] A driving substrate, comprising a base plate and a driving circuit disposed on one side of the base plate;

[0005] A test signal line is arranged on one side of the bottom plate, the test signal line is electrically connected to the drive circuit, the test signal line is used to electrically connect to a test device, and the test signal line is also used to be separated from the test device after being cut, and the test signal line after cutting forms an exposed cutting surface;

[0006] A liquid storage member is provided on the test signal line, the liquid storage member has a receiving cavity for receiving a protection liquid, and when the test signal line is cut, the liquid storage member can be cut to leak out of the receiving cavity, so that the protection liquid flows out;

[0007] The protective layer covers the cut surface and is formed by the protective liquid.

[0008] The display panel provided in the first aspect of the present application, after completing the electrical test of the driving substrate, the test signal line and the liquid storage member are cut, and the protective liquid flows out from the cut liquid storage member and covers the cut surface of the test signal line to form a protective layer. The protective layer can isolate the test signal line from the contact with external oxygen and water vapor, reduce the risk of corrosion of the test signal line, thereby reducing the risk of corrosion of the driving circuit, and improving the reliability of the display panel. In addition, the protective layer can also prevent external static electricity from being transmitted to the test signal line, protect the driving circuit, and further improve the reliability of the display panel.

[0009] In addition, the protective layer can be formed after cutting the test signal line and the liquid storage member, thereby omitting the packaging process of the cut surface, saving preparation time and improving preparation efficiency.

[0010] In summary, the present application sets a liquid storage component to form a protective layer covering the cutting surface when cutting the test signal line, thereby isolating the test signal line from contact with external oxygen and water vapor, reducing the risk of corrosion of the test signal line, thereby reducing the risk of corrosion of the driving circuit, and improving the reliability of the display panel.

[0011] The protective liquid includes an insulating base liquid and a heat absorbent; the heat absorbent satisfies at least one of the following conditions:

[0012] The mass percentage of the heat absorbent in the protective liquid is 0.5%-2%;

[0013] The material of the heat absorber includes at least one of carbon black, polyethylene glycol and silicon nitride.

[0014] Wherein, the protective liquid includes an insulating base liquid and a shape memory agent; the shape memory agent satisfies at least one of the following conditions:

[0015] The mass percentage of the shape memory agent in the protective liquid is 3%-5%;

[0016] The material of the shape memory agent includes at least one of hydrocarbon resin, polyurethane and polylactone.

[0017] The display panel further comprises a flat layer covering the test signal line, a surface of the flat layer facing the test signal line is provided with a through hole, the through hole corresponds to the test signal line, and the liquid storage member is arranged in the through hole.

[0018] Wherein, an adhesive is also provided in the through hole, and the liquid storage component is bonded and connected to the hole wall of the through hole by the adhesive.

[0019] Wherein, along the arrangement direction perpendicular to the bottom plate to the test signal line, the width of the liquid storage member is greater than the width of the test signal line;

[0020] And / or, along the arrangement direction from the bottom plate to the test signal lines, the height of the liquid storage member is less than the thickness of the flat layer.

[0021] The accommodating cavity has a first cavity wall and a second cavity wall opposite to each other, and along the arrangement direction from the liquid storage member to the test signal line, the distance between the first cavity wall and the second cavity wall gradually decreases;

[0022] And / or, a cavity wall of the accommodating cavity is provided with a groove extending along an arrangement direction from the liquid storage member to the test signal line, and the groove is used to guide the flow of the protection liquid.

[0023] A second aspect of the present application provides a display device, which includes a housing and a display panel as provided in the first aspect of the present application, wherein the display panel is mounted on the housing.

[0024] The display device provided in the second aspect of the present application adopts the display panel provided in the first aspect of the present application. The display panel utilizes a liquid storage component to form a protective layer covering the cutting surface when cutting the test signal line, thereby isolating the test signal line from contact with external oxygen and water vapor, reducing the risk of corrosion of the test signal line, thereby reducing the risk of corrosion of the driving circuit, and improving the reliability of the display panel.

[0025] A third aspect of the present application provides a method for preparing a display panel, the method comprising:

[0026] A display panel is provided, the display panel comprising a driving substrate, a test signal line, and a liquid storage member, the driving substrate comprising a bottom plate and a driving circuit arranged on one side of the bottom plate, the test signal line is arranged on one side of the bottom plate and electrically connected to the driving circuit, the liquid storage member is arranged on the test signal line, and the liquid storage member has a receiving cavity for receiving a protective liquid;

[0027] electrically connecting the test signal line to a test device;

[0028] The test signal line and the liquid storage member are cut to separate the test signal line from the test device, the test signal line after cutting forms an exposed cutting surface, and the liquid storage member leaks out of the accommodating cavity, so that the protective liquid flows out and forms a protective layer covering the cutting surface.

[0029] The third aspect of the present application provides a method for preparing a display panel, which forms a protective layer covering the cut surface when cutting the test signal line by setting a liquid storage part, thereby isolating the test signal line from contact with external oxygen and water vapor, reducing the risk of corrosion of the test signal line, thereby reducing the risk of corrosion of the driving circuit, and improving the reliability of the display panel.

[0030] Wherein, the step of providing a display panel includes:

[0031] forming a flat layer covering the test signal line;

[0032] forming a through hole penetrating through a surface of the flat layer facing the test signal line, the through hole corresponding to the test signal line;

[0033] The liquid storage component is arranged in the through hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the implementation modes of the present application, the drawings required for use in the implementation modes of the present application will be described below.

[0035] Figure 1 A schematic diagram of the structure of a test signal line connection test device in a display panel provided in one embodiment of the present application.

[0036] Figure 2 A schematic diagram of a structure in which a test signal line is separated from a test device in a display panel provided in one embodiment of the present application.

[0037] Figure 3 A cross-sectional view of a test signal line connection test device in a display panel provided in one embodiment of the present application.

[0038] Figure 4 A cross-sectional view of a display panel provided by one embodiment of the present application showing a test signal line separated from a test device.

[0039] Figure 5 A top view of a display panel provided in accordance with an embodiment of the present application.

[0040] Figure 6 A cross-sectional view of a liquid storage component provided in one embodiment of the present application.

[0041] Figure 7 A schematic diagram of the structure of a liquid storage component provided in one embodiment of the present application.

[0042] Figure 8 A schematic diagram of a process for preparing a display panel provided in one embodiment of the present application.

[0043] Fig. 9 A schematic flow chart of a method for preparing a display panel provided in another embodiment of the present application.

[0044] Fig.10 A schematic diagram of a method for preparing a display panel according to an embodiment of the present invention Figure 1 .

[0045] Fig.11 A schematic diagram of a method for preparing a display panel according to an embodiment of the present invention Figure 2 .

[0046] Fig.12 A schematic diagram of a method for preparing a display panel according to an embodiment of the present invention Figure 3 .

[0047] Explanation of reference numerals: display panel 1, driving substrate 11, bottom plate 111, driving circuit 112, test signal line 12, cutting surface 121, driving signal line 13, test module 14, liquid storage member 15, accommodating cavity 151, first cavity wall 152, second cavity wall 153, groove 154, protective layer 16, flat layer 17, through hole 171, test device 2. DETAILED DESCRIPTION

[0048] The following are preferred implementations of the present application. It should be noted that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application, and these improvements and modifications are also considered to be within the scope of protection of the present application.

[0049] Unless otherwise specified or there is a contradiction, the terms and phrases used in this application have the following meanings:

[0050] In this application, "first", "second", etc. are used only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0051] In this application, "one or several" refers to any one, any two or more of the listed items. Among them, "several" refers to any two or more of the listed items.

[0052] In the present application, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0053] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated. It can be mechanically connected or electrically connected. It can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0054] Please refer to Figure 1-Figure 4, this embodiment provides a display panel 1, the display panel 1 includes a driving substrate 11, a test signal line 12, a liquid storage member 15, and a protective layer 16. The driving substrate 11 includes a base plate 111, and a driving circuit 112 arranged on one side of the base plate 111. The test signal line 12 is arranged on one side of the base plate 111, the test signal line 12 is electrically connected to the driving circuit 112, the test signal line 12 is used to electrically connect to the test device 2, and the test signal line 12 is also used to be separated from the test device 2 after cutting, and the test signal line 12 after cutting forms an exposed cutting surface 121. The liquid storage member 15 is arranged on the test signal line 12, and the liquid storage member 15 has a accommodating cavity 151 for accommodating a protective liquid. When the test signal line 12 is cut, the liquid storage member 15 can be cut to leak out the accommodating cavity 151, so that the protective liquid flows out. The protective layer 16 covers the cutting surface 121 and is formed by the protective liquid.

[0055] The display panel 1 provided in this embodiment can be used for an LED display device, a miniLED display device, an OLED display device, etc.

[0056] The display panel 1 provided in this embodiment includes a driving substrate 11 and a test signal line 12, and the driving substrate 11 is used to drive and control the display panel 1. The driving substrate 11 can also be called an array substrate. The test signal line 12 is used to electrically connect the test device 2. One end of the test signal line 12 is electrically connected to the driving circuit 112, and the test signal line 12 can be directly electrically connected to the driving circuit 112, or indirectly electrically connected to the driving circuit 112 through other components.

[0057] Optionally, the display panel 1 further includes a driving signal line 13 and a test module 14, wherein the driving signal line 13 and the test module 14 are both arranged on one side of the base plate 111, and the test module 14 is located between the driving signal line 13 and the test signal line 12. One end of the driving signal line 13 is electrically connected to the driving circuit 112, and the other end is electrically connected to the test module 14. The test signal line 12 is electrically connected to the test module 14, and the other end is used to be electrically connected to the test device 2. Optionally, the driving substrate 11 has a display area and a non-display area surrounding the display area, the driving circuit 112 is arranged in the display area, the driving signal line 13 is at least partially arranged in the non-display area, and the test module 14 and the test signal line 12 are arranged in the non-display area.

[0058] In the related art, it is necessary to conduct electrical testing on the display panel to detect whether there are defects in the process of the driving substrate, to grasp the yield of the driving substrate process and to screen out defective products in time. The method of electrical testing is: by electrically connecting the test signal line and the test device, loading the test signal line with a test signal, and the test signal line transmits the test signal to the test module to detect the driving circuit.

[0059] After the electrical test is completed, the test signal line is cut, and then integrated circuits, flexible circuit boards and other components are bound to assemble a display device. After the test signal line is cut, the test signal line will form an exposed cut surface at the edge of the driving substrate. The cut surface exposes the test signal line to the air, and the risk of corrosion is extremely high, forming a corrosion-prone area. Over time, the corrosion position will continue to spread until the connection point between the test signal line and the drive signal line is corroded, causing the drive signal of the drive signal line to be abnormal. In addition, the test signal line at the edge of the drive substrate is susceptible to static electricity or conductive foreign matter. These abnormal signals will be transmitted to the drive signal line along the test signal line, which will cause the drive signal of the drive signal line to be abnormal, affecting the drive circuit and damaging the display panel.

[0060] The display panel 1 provided in this embodiment also includes a liquid storage component 15 for storing a protective liquid. Optionally, the liquid storage component 15 has insulating properties. It can be understood that the liquid storage component 15 is a closed hollow box made of insulating material, which is filled with a protective liquid. Optionally, the protective liquid includes an insulating base liquid, which can also be understood as an insulating liquid. Further optionally, the material of the insulating base liquid includes at least one of epoxy resin and silicone. When the test signal line 12 is cut, the liquid storage component 15 is cut at the same time, causing the protective liquid to flow out of the accommodating cavity 151.

[0061] The display panel 1 provided in this embodiment further includes a protective layer 16, which is used to protect the cut surface 121, isolate the test signal line 12 from contact with the external oxidation and humid environment, and prevent the test signal line 12 from being corroded. Optionally, the protective layer 16 has hydrophobicity and insulation. The protective layer 16 is formed by a protective liquid. Specifically, the protective liquid can be attached to the cut surface 121 by utilizing the fluidity and wettability of the protective liquid, and is cured by the heat energy generated during cutting, and the protective layer 16 is formed by the protective liquid.

[0062] After the electrical test of the driving substrate 11 is completed, the display panel 1 provided in this embodiment is cut by cutting the test signal line 12 and the liquid storage member 15. Figure 3As shown in L in the figure, the protective liquid flows out from the cut liquid storage member 15 and covers the cut surface 121 of the test signal line 12, forming a protective layer 16. The protective layer 16 can isolate the test signal line 12 from the contact with external oxygen and water vapor, reduce the risk of corrosion of the test signal line 12, thereby reducing the risk of corrosion of the drive circuit 112, and improving the reliability of the display panel 1. In addition, the protective layer 16 can also prevent external static electricity from being transmitted to the test signal line 12, protect the drive circuit 112, and further improve the reliability of the display panel 1.

[0063] In addition, the protection layer 16 can be formed after cutting the test signal line 12 and the liquid storage member 15 , thereby omitting the packaging process of the cut surface 121 , saving preparation time and improving preparation efficiency.

[0064] In summary, in this embodiment, a liquid storage component 15 is provided to form a protective layer 16 covering the cutting surface 121 when the test signal line 12 is cut, thereby isolating the test signal line 12 from contact with external oxygen and water vapor, reducing the risk of corrosion of the test signal line 12, thereby reducing the risk of corrosion of the driving circuit 112, and improving the reliability of the display panel 1.

[0065] In one embodiment, the protective liquid includes an insulating base liquid and a heat absorbent.

[0066] The material of the heat absorbent includes heat-sensitive and heat-absorbing groups. By providing the heat absorbent in the protective liquid, the response and heat absorption capacity of the protective liquid to the heat energy generated during cutting are improved, and the utilization rate of the heat energy and waste heat generated during cutting is improved, so that the protective liquid can more easily reach its curing temperature, and the protective performance of the protective layer 16 formed by the protective liquid is improved.

[0067] The heat absorber satisfies at least one of the following conditions: the mass percentage of the heat absorber in the protective liquid is 0.5%-2%. For example, the mass percentage of the heat absorber in the protective liquid can be 0.5%, or 0.75%, or 1%, or 1.25%, or 1.5%, or 1.75%, or 2%, etc. Further, the mass percentage of the heat absorber in the protective liquid is 1%-1.5%.

[0068] This embodiment limits the mass percentage of the heat absorber in the protective liquid to 0.5%-2%, which can not only improve the response and heat absorption capacity of the protective liquid to the heat energy generated during cutting, but also ensure that the protective liquid has sufficient insulating base liquid to ensure that the protective layer 16 has high protective performance.

[0069] And / or, the material of the heat absorber includes at least one of carbon black, polyethylene glycol, and silicon nitride.

[0070] In one embodiment, the protective liquid includes an insulating base liquid and a shape memory agent.

[0071] The material of the shape memory agent includes a shape memory effect material. By setting the shape memory agent in the protective liquid, the protective liquid is guided to form an ultra-thin one-dimensional structural matrix protective layer 16 under the stimulation of thermal energy, and the protective liquid is prompted to form a uniform and flat protective layer 16 on the cutting surface 121, so as to improve the uniformity and flatness of the protective layer 16. In addition, the shape memory agent enables the protective layer 16 to have a certain self-repairing ability and stability, improves the protective performance of the protective layer 16, and improves the anti-corrosion performance of the protective layer 16.

[0072] The shape memory agent satisfies at least one of the following conditions: the mass percentage of the shape memory agent in the protective liquid is 3%-5%. For example, the mass percentage of the shape memory agent in the protective liquid can be 3%, or 3.25%, or 3.5%, or 3.75%, or 4%, or 4.25%, or 4.5%, or 4.75%, or 5%, etc. Further, the mass percentage of the shape memory agent in the protective liquid is 3.5%-4.5%.

[0073] This embodiment limits the mass percentage of the shape memory agent in the protective liquid to 0.5%-2%, which can not only guide the protective liquid to form a uniform and flat protective layer 16 under the stimulation of thermal energy, but also enable the protective liquid to have sufficient insulating base liquid, thereby ensuring that the protective layer 16 has high protective performance.

[0074] And / or, the material of the shape memory agent includes at least one of hydrocarbon resin, polyurethane, and polylactone.

[0075] Optionally, in one embodiment, the protective liquid includes an insulating base liquid, a heat absorbent, and a shape memory agent.

[0076] Please refer to Figure 5 In one embodiment, the display panel 1 further includes a flat layer 17 covering the test signal line 12, and a through hole 171 is provided on a surface of the flat layer 17 facing the test signal line 12, the through hole 171 corresponds to the test signal line 12, and the liquid storage member 15 is disposed in the through hole 171.

[0077] The liquid storage member 15 is entirely disposed in the through hole 171, and the through hole 171 corresponds to the test signal line 12. Optionally, the through hole 171 penetrates the surface of the flat layer 17 facing the test signal line 12 and the surface of the flat layer 17 away from the test signal line 12. Optionally, the liquid storage member 15 abuts against the hole wall of the through hole 171. Optionally, the liquid storage member 15 is disposed on the side of the test signal line 12 away from the bottom plate 111. Optionally, the flat layer 17 covers the liquid storage member 15, or the liquid storage member 15 is exposed from the through hole 171.

[0078] Specifically, during the preparation of the display panel 1, the planar layer 17 is patterned to form a connection hole, and at the same time, a through hole 171 is etched on the planar layer 17, and the connection hole is used to accommodate a conductive layer electrically connected to the driving circuit 112. In this embodiment, the through hole 171 added to the planar layer 17 shares the same mask as the connection hole, and there is no need to add a mask and a manufacturing process.

[0079] Therefore, in this embodiment, a through hole 171 is set on the flat layer 17, and the liquid storage component 15 is set in the through hole 171, so as to firmly fix the liquid storage component 15 to the flat layer 17, thereby improving the reliability of the display panel 1. In addition, the through hole 171 corresponds to the test signal line 12, so as to facilitate the positioning of the liquid storage component 15 and reduce the difficulty of preparation.

[0080] In one embodiment, an adhesive is further provided in the through hole 171 , and the liquid storage member 15 is bonded and connected to the hole wall of the through hole 171 by the adhesive.

[0081] Specifically, after etching the through hole 171 on the flat layer 17, the adhesive is applied to the hole wall of the through hole 171, and then the liquid storage member 15 is placed in the through hole 171, so that the liquid storage member 15 is bonded and connected to the hole wall of the through hole 171, and then the subsequent film layer is manufactured.

[0082] Therefore, in this embodiment, adhesive is used to bond the liquid storage member 15 to the wall of the through hole 171 , thereby improving the connection performance between the liquid storage member 15 and the flat layer 17 , thereby further improving the reliability of the display panel 1 .

[0083] Please refer to Figure 3 and Figure 5 In one embodiment, along the direction perpendicular to the bottom plate 111 to the arrangement direction of the test signal line 12, the width of the liquid storage member 15 (eg Figure 5 H1 in FIG. 1 ) is larger than the width of the test signal line 12 (as shown in FIG. Figure 5 (as shown in H2).

[0084] Along the arrangement direction perpendicular to the bottom plate 111 to the test signal line 12, the liquid storage member 15 covers the test signal line 12. In this embodiment, by limiting the width of the liquid storage member 15 to be greater than the width of the test signal line 12, the protective liquid can completely cover the cut surface 121 of the test signal line 12, ensuring that the protective layer 16 can completely cover the cut surface 121, further reducing the risk of the test signal line 12 being corroded.

[0085] And / or, along the arrangement direction from the bottom plate 111 to the test signal line 12, the height of the liquid storage member 15 (eg Figure 3 D1 in FIG. 1 ) is smaller than the thickness of the flat layer 17 (as shown in FIG. Figure 3(shown in D2).

[0086] In this embodiment, by limiting the height of the liquid storage member 15 and the thickness of the flat layer 17 , the liquid storage member 15 is embedded in the flat layer 17 , thereby avoiding interference between the liquid storage member 15 and other components and improving the reliability of the display panel 1 .

[0087] Please refer to Figure 6-Figure 7 In one embodiment, the accommodating cavity 151 has a first cavity wall 152 and a second cavity wall 153 opposite to each other, and along the arrangement direction from the liquid storage member 15 to the test signal line 12, the distance between the first cavity wall 152 and the second cavity wall 153 gradually decreases.

[0088] The distance between the first cavity wall 152 and the second cavity wall 153 is gradually reduced, for example, the first cavity wall 152 is tilted; another example, the second cavity wall 153 is tilted; another example, the first cavity wall 152 and the second cavity wall 153 are both tilted. In this embodiment, the first cavity wall 152 and / or the second cavity wall 153 are tilted by the relative distance between the first cavity wall 152 and the second cavity wall 153, which is conducive to more protection liquid flowing to the cutting surface 121 along the tilted cavity wall, and the protection liquid flows to the cutting surface 121 faster, thereby improving the protection performance of the protection layer 16.

[0089] And / or, the cavity wall of the accommodating cavity 151 is provided with a groove 154 extending along the arrangement direction from the liquid storage member 15 to the test signal line 12, and the groove 154 is used to guide the flow of the protection liquid.

[0090] The groove 154 is extended along the height direction of the liquid storage member 15. Optionally, a plurality of grooves 154 are spaced apart along the circumferential direction of the liquid storage member 15. Optionally, the groove 154 has a first groove side wall and a second groove side wall opposite to each other, and an end of the first groove side wall away from the groove opening is connected to an end of the second groove side wall away from the groove opening to form a sharp angle. In this embodiment, the groove 154 is provided on the cavity wall of the liquid storage cavity to guide the flow of the protective liquid, which is conducive to more protective liquid flowing to the cutting surface 121, and is conducive to the protective liquid flowing to the cutting surface 121 faster, thereby improving the protective performance of the protective layer 16.

[0091] The present application also provides a display device, which includes a housing and a display panel 1 as provided above in the present application, wherein the display panel 1 is mounted on the housing.

[0092] The display device provided in this embodiment adopts the display panel 1 provided above in this application. The display panel 1 utilizes a liquid storage member 15 to form a protective layer 16 covering the cut surface 121 when cutting the test signal line 12, thereby isolating the test signal line 12 from contact with external oxygen and water vapor, reducing the risk of corrosion of the test signal line 12, thereby reducing the risk of corrosion of the drive circuit 112, and improving the reliability of the display panel 1.

[0093] Please refer to Figure 1-Figure 8 The present application also provides a method for preparing a display panel 1, the method comprising:

[0094] S100, provide a display panel 1, the display panel 1 includes a driving substrate 11, a test signal line 12, and a liquid storage member 15, the driving substrate 11 includes a base plate 111, and a driving circuit 112 arranged on one side of the base plate 111, the test signal line 12 is arranged on one side of the base plate 111 and electrically connected to the driving circuit 112, the liquid storage member 15 is arranged on the test signal line 12, and the liquid storage member 15 has a accommodating cavity 151 for accommodating a protective liquid.

[0095] S200 , electrically connecting the test signal line 12 and the test device 2 .

[0096] S300, cutting the test signal line 12 and the liquid storage component 15 to separate the test signal line 12 from the test device 2, the test signal line 12 after cutting forms an exposed cutting surface 121, and the liquid storage component 15 leaks out of the accommodating cavity 151, so that the protective liquid flows out and forms a protective layer 16 covering the cutting surface 121.

[0097] After the electrical test is completed, the test signal line 12 and the liquid storage member 15 are cut at the same time, and the protective liquid flows from the liquid storage member 15 to the cutting surface 121. The protective liquid can adhere to the cutting surface 121 and solidify with the help of the heat energy generated during cutting, and the protective liquid forms a protective layer 16. The protective layer 16 can isolate the test signal line 12 from the contact with external oxygen and water vapor, reduce the risk of corrosion of the test signal line 12, thereby reducing the risk of corrosion of the drive circuit 112, and improving the reliability of the display panel 1. In addition, the protective layer 16 can also prevent external static electricity from being transmitted to the test signal line 12, protect the drive circuit 112, and further improve the reliability of the display panel 1.

[0098] In addition, the protection layer 16 can be formed after cutting the test signal line 12 and the liquid storage member 15 , thereby omitting the packaging process of the cut surface 121 , saving preparation time and improving preparation efficiency.

[0099] Therefore, the preparation method of the display panel 1 provided in this embodiment, by setting a liquid storage part 15, forms a protective layer 16 covering the cutting surface 121 when cutting the test signal line 12, thereby isolating the test signal line 12 from contact with external oxygen and water vapor, reducing the risk of corrosion of the test signal line 12, thereby reducing the risk of corrosion of the driving circuit 112, and improving the reliability of the display panel 1.

[0100] Please refer to Figure 1-Figure 12 In one embodiment, in said S100, the step of providing a display panel 1 includes:

[0101] like Fig.10 and Fig.11 As shown, S110 , a planar layer 17 covering the test signal line 12 is formed.

[0102] like Fig.12 As shown, S120 , a through hole 171 is formed penetrating through the surface of the planar layer 17 facing the test signal line 12 , and the through hole 171 corresponds to the test signal line 12 .

[0103] like Figure 5 As shown, S130, the liquid storage member 15 is disposed in the through hole 171.

[0104] Optionally, a through hole 171 is formed by etching on the planar layer 17. Specifically, during the preparation of the display panel 1, the planar layer 17 is patterned to form a connection hole, and at the same time, the through hole 171 is etched on the planar layer 17, and the connection hole is used to accommodate a conductive layer electrically connected to the driving circuit 112. In this embodiment, the through hole 171 added to the planar layer 17 shares the same mask as the connection hole, and there is no need to add a mask and a manufacturing process.

[0105] Therefore, in this embodiment, a through hole 171 is set on the flat layer 17, and the liquid storage component 15 is set in the through hole 171, so as to firmly fix the liquid storage component 15 to the flat layer 17, thereby improving the reliability of the display panel 1. In addition, the through hole 171 corresponds to the test signal line 12, so as to facilitate the positioning of the liquid storage component 15 and reduce the difficulty of preparation.

[0106] Optionally, before the step of placing the liquid storage member 15 in the through hole 171 in S130, the method further includes:

[0107] Provide adhesive and apply the adhesive to the wall of the through hole 171.

[0108] The liquid storage member 15 is disposed in the through hole 171 , and the liquid storage member 15 is bonded to the hole wall of the through hole 171 by the adhesive.

[0109] Therefore, in this embodiment, adhesive is used to bond the liquid storage member 15 to the wall of the through hole 171 , thereby improving the connection performance between the liquid storage member 15 and the flat layer 17 , thereby further improving the reliability of the display panel 1 .

[0110] The above is a detailed introduction to the contents provided in the implementation mode of the present application. This article explains and illustrates the principles and implementation modes of the present application. The above explanation is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation mode and application scope. In summary, the contents of this specification should not be understood as limiting the present application.

Claims

1. A display panel, characterized in that: The display panel comprises: A driving substrate, comprising a base plate and a driving circuit disposed on one side of the base plate; A test signal line is arranged on one side of the bottom plate, the test signal line is electrically connected to the drive circuit, the test signal line is used to electrically connect to a test device, and the test signal line is also used to be separated from the test device after being cut, and the test signal line after cutting forms an exposed cutting surface; A liquid storage member is provided on the test signal line, the liquid storage member has a receiving cavity for receiving a protection liquid, and when the test signal line is cut, the liquid storage member can be cut to leak out of the receiving cavity, so that the protection liquid flows out; The protective layer covers the cut surface and is formed by the protective liquid.

2. The display panel according to claim 1, wherein: The protective liquid includes an insulating base liquid and a heat absorbent; the heat absorbent satisfies at least one of the following conditions: The mass percentage of the heat absorbent in the protective liquid is 0.5%-2%; The material of the heat absorber includes at least one of carbon black, polyethylene glycol and silicon nitride.

3. The display panel according to claim 1, wherein: The protective liquid includes an insulating base liquid and a shape memory agent; the shape memory agent satisfies at least one of the following conditions: The mass percentage of the shape memory agent in the protective liquid is 3%-5%; The material of the shape memory agent includes at least one of hydrocarbon resin, polyurethane and polylactone.

4. The display panel according to claim 1, wherein: The display panel further includes a flat layer covering the test signal line. A through hole is provided on a surface of the flat layer facing the test signal line. The through hole corresponds to the test signal line. The liquid storage member is provided in the through hole.

5. The display panel according to claim 4, wherein: Adhesive is also provided in the through hole, and the liquid storage component is bonded and connected to the hole wall of the through hole through the adhesive.

6. The display panel according to claim 4, wherein: Along the arrangement direction perpendicular to the bottom plate to the test signal line, the width of the liquid storage member is greater than the width of the test signal line; And / or, along the arrangement direction from the bottom plate to the test signal lines, the height of the liquid storage member is less than the thickness of the flat layer.

7. The display panel according to claim 1, wherein: The accommodating cavity has a first cavity wall and a second cavity wall opposite to each other, and along the arrangement direction from the liquid storage member to the test signal line, the distance between the first cavity wall and the second cavity wall gradually decreases; And / or, a cavity wall of the accommodating cavity is provided with a groove extending along an arrangement direction from the liquid storage member to the test signal line, and the groove is used to guide the flow of the protection liquid.

8. A display device, characterized in that: The display device comprises a housing and a display panel as claimed in any one of claims 1 to 7, wherein the display panel is mounted on the housing.

9. A method for preparing a display panel, characterized in that: The preparation method comprises: A display panel is provided, the display panel comprising a driving substrate, a test signal line, and a liquid storage member, the driving substrate comprising a bottom plate and a driving circuit arranged on one side of the bottom plate, the test signal line is arranged on one side of the bottom plate and electrically connected to the driving circuit, the liquid storage member is arranged on the test signal line, and the liquid storage member has a receiving cavity for receiving a protective liquid; electrically connecting the test signal line to a test device; The test signal line and the liquid storage member are cut to separate the test signal line from the test device, the test signal line after cutting forms an exposed cutting surface, and the liquid storage member leaks out of the accommodating cavity, so that the protective liquid flows out and forms a protective layer covering the cutting surface.

10. The method for preparing a display panel according to claim 9, characterized in that: The step of providing a display panel includes: forming a flat layer covering the test signal line; forming a through hole penetrating through a surface of the flat layer facing the test signal line, the through hole corresponding to the test signal line; The liquid storage component is arranged in the through hole.

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