A display panel, a printing device, and a method for manufacturing a display panel

Abstract

The present invention relates to a display panel, a printing device and a method for manufacturing a display panel. By cooperating the printing device with the display panel, the present invention can increase the widths of the first conductor and the second conductor, and reduce the risk of open circuit between the first conductor and the first bonding terminal, and between the second conductor and the second bonding terminal. The first conductor and the second conductor of the present invention are not in the same plane, which can reduce the risk of short circuit between the first conductor and the second conductor. The present invention prepares a hydrophobic and oleophobic layer on two sidewalls of each of the second grooves. When the printing device dips the conductive liquid, the two sidewalls of the second grooves will not dip the conductive liquid, so that the substrate on the two sidewalls of the first groove is not covered with the conductive liquid, further preventing a short circuit phenomenon between the first conductor and the second conductor.

Description

Technical Field

[0001] The present application relates to the field of display technologies, and particularly relates to a display panel, a printing device, and a method for manufacturing a display panel. Background Art

[0002] In today's rapidly developing new display field, people's demand for full-screen or extra-large screens is gradually increasing. MLED is the general term for sub-millimeter light-emitting diodes (English: Mini LED) and micro light-emitting diodes (English: Micro LED). MLED has advantages such as fast response, high color gamut, high PPI, and low energy consumption, and has gradually become a hot spot in future display technologies.

[0003] Currently, the technologies of Mini LED and Micro LED are relatively complex and have many difficulties. Among them, the side printing process has a great impact on the yield of the display panel. As Figure 1 、 Figure 2 shown, the side printing surface 1001 of the display panel 100 in the prior art is a flat surface. As Figure 3 shown, the printing head 2002 of the printing device 200 in the prior art protrudes from the main body 2001 by the same height. The difficulties existing in the side printing process of using the printing device 200 in the prior art to dip the conductive liquid 1002 and press it onto the side printing surface 1001 of the display panel 100 are mainly divided into two parts. One part comes from the open circuit of the conductive liquid 1002, and the other part comes from the short circuit of the conductive liquid 1002 caused by multiple side printings. Summary of the Invention

[0004] The purpose of the present invention is to provide a display panel, a printing device, and a method for manufacturing a display panel, which can solve the problems of open circuit and short circuit of the conductive liquid existing in the existing side printing process, resulting in a low yield of the display panel and other problems.

[0005] To solve the above problems, the present invention provides a display panel, which includes: a substrate, which includes a first surface and a side printing surface perpendicular to the first surface; a plurality of bonding terminals, which are arranged in parallel and at intervals on the first surface of the substrate; the bonding terminals include first bonding terminals and second bonding terminals arranged alternately; a plurality of first grooves, which are arranged at intervals on the side printing surface of the substrate, and the first grooves correspond to the first bonding terminals one by one; a first protrusion is formed between any two adjacent first grooves; a plurality of first conductors, which are arranged on the substrate at the bottom surface of the first groove, the first conductors correspond to the first grooves one by one, and are connected to the first bonding terminals one by one; and a plurality of second conductors, which are arranged on the substrate at the top surface of the first protrusion, the second conductors correspond to the first protrusions one by one, and are connected to the second bonding terminals one by one; any one of the first conductors and any one of the second conductors are not electrically connected to each other.

[0006] Further, the material of the first conductor is the same as that of the second conductor.

[0007] Further, the shapes and sizes of any two of the first grooves are the same.

[0008] Further, the widths of any two of the first protrusions are the same.

[0009] To solve the above problems, the present invention further provides a printing device for preparing the display panel of the present invention. The printing device includes: a body; a plurality of second grooves spaced apart on the surface of one side of the body; a second protrusion formed between any two adjacent second grooves; a plurality of first printing heads mounted on the body on the top surface of the second protrusion; the first printing heads corresponding to the second protrusions one by one; and a plurality of second printing heads mounted on the body on the bottom surface of the second groove; the second printing heads corresponding to the second grooves one by one.

[0010] Further, the printing device further includes: a plurality of hydrophobic and oleophobic layers provided on two side walls of each of the second grooves.

[0011] Further, the material of the hydrophobic and oleophobic layer includes one or more of metal phosphate, metal polyphosphate compound, polytetrafluoroethylene, and fluorinated polyethylene.

[0012] To solve the above problems, the present invention further provides a method for preparing a display panel, which includes the following steps: providing a substrate, the substrate including a first surface and a side printing surface perpendicular to the first surface; preparing a plurality of mutually parallel and spaced bonding terminals on the first surface of the substrate, the bonding terminals including alternately arranged first bonding terminals and second bonding terminals; arranging a plurality of first grooves at intervals on the side printing surface of the substrate, the first grooves corresponding to the first bonding terminals one by one; a first protrusion is formed between any two adjacent first grooves; and using the printing device of the present invention to form a first conductor on the substrate on the bottom surface of the first groove, and a second conductor on the substrate on the top surface of the first protrusion, the first conductor corresponding to the first groove one by one, the first conductor being connected to the first bonding terminal one by one; the second conductor corresponding to the first protrusion one by one, the second conductor being connected to the second bonding terminal one by one; any one of the first conductors and any one of the second conductors are not electrically connected to each other.

[0013] Further, the steps of forming the first conductor on the substrate at the bottom surface of the first groove and forming the second conductor on the substrate at the top surface of the first protrusion further include: first, hydrophobic and oleophobic layers are provided on two side walls of each second groove, and then the printing device is used to dip the conductive liquid, the first printing head is aligned with the first groove, the body is pressed, and the conductive liquid on the first printing head is printed onto the substrate at the bottom surface of the first groove to form the first conductor, and the conductive liquid on the second printing head is printed onto the substrate at the top surface of the first protrusion to form the second conductor.

[0014] Further, when pressing the body, the first protrusion is fitted into the second groove, and the second protrusion and the second printing head are fitted into the first groove.

[0015] The advantages of the present invention are as follows: By cooperating the printing device with the display panel, the present invention can increase the widths of the first conductor and the second conductor, and reduce the open circuit risks between the first conductor and the first bonding terminal, and between the second conductor and the second bonding terminal. The first conductor and the second conductor of the present invention are not in the same plane, which can reduce the short circuit risk between the first conductor and the second conductor. The present invention prepares hydrophobic and oleophobic layers on two side walls of each second groove. When the printing device dips the conductive liquid, the two side walls of the second groove will not dip the conductive liquid, so that the substrate on the two side walls of the first groove is not covered with the conductive liquid, further preventing the short circuit phenomenon between the first conductor and the second conductor. The process of the present invention is simple, and the printing device has strong compatibility. When the display panels of the present invention are spliced, the splicing seam is a concave-convex line, and the user's sensitivity to the contour of the concave-convex line is lower than that to the straight line; moreover, users are used to observing from left to right and from top to bottom, and the splicing seam requires a longer observation time and more information, so the time to discover the splicing seam is longer. Therefore, when the display panels of the present invention are spliced, the splicing seam is more inconspicuous. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0017] Figure 1 is a top view of the display panel in the prior art before side printing;

[0018] Figure 2 is a top view of the display panel in the prior art after side printing;

[0019] Figure 3It is a schematic diagram of a printing device in the prior art;

[0020] Figure 4 It is a top view of the side printing of the display panel of the present invention;

[0021] Figure 5 It is a schematic diagram of the printing device of the present invention;

[0022] Figure 6 It is a process diagram of the preparation of the display panel of the present invention;

[0023] Figure 7 It is a top view of the side printing of the display panel of the present invention before side printing;

[0024] Figure 8 It is a plan schematic diagram of the splicing display device of the present invention.

[0025] Explanation of reference numerals:

[0026] 1. Display panel; 2. Printing device;

[0027] 11. Substrate; 12. Bonding terminal;

[0028] 13. First groove; 14. First conductor;

[0029] 15. Second conductor; 16. First protrusion;

[0030] 111. First surface; 112. Side printing surface;

[0031] 121. First bonding terminal; 122. Second bonding terminal;

[0032] 21. Body; 22. Second groove;

[0033] 23. First printing head; 24. Second printing head;

[0034] 25. Hydrophobic and oleophobic layer; 26. Second protrusion. Detailed description of the specific implementation

[0035] The following will describe in detail the preferred embodiments of the present invention in conjunction with the accompanying drawings of the specification, so as to fully introduce the technical content of the present invention to those skilled in the art, to prove by example that the present invention can be implemented, to make the technical content disclosed by the present invention clearer, and to make it easier for those skilled in the art to understand how to implement the present invention. However, the present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned in the text. The description of the following embodiments is not used to limit the scope of the present invention.

[0036] In the accompanying drawings, components with the same structure are denoted by the same numerical labels, and components with similar structures or functions everywhere are denoted by similar numerical labels. In addition, for ease of understanding and description, the dimensions and thicknesses of each component shown in the drawings are arbitrarily shown, and the present invention does not limit the dimensions and thicknesses of each component.

[0037] Embodiment 1

[0038] This embodiment provides a display panel 1. In this embodiment, the display panel is a Mini LED. In other embodiments, the display panel 1 may also be a liquid crystal display (English: Liquid Crystal Display, abbreviated as LCD), MicroLED, etc.

[0039] As Figure 4 shown, the display panel 1 includes: a substrate 11, a plurality of bonding terminals 12, a plurality of first grooves 13, a plurality of first conductors 14, and a plurality of second conductors 15.

[0040] Among them, the substrate 11 includes one of a glass plate, a printed circuit board, a BT resin plate, and an aluminum plate. In this embodiment, the substrate 11 is a glass plate.

[0041] Among them, the substrate 11 includes a first surface 111 and a side printing surface 112 perpendicular to the first surface 111.

[0042] In fact, the display panel 1 of this embodiment further includes a driving layer, and the driving layer includes thin film transistor devices. In other embodiments, the driving layer may further include a driving chip, such as: Micro IC, PM driver IC.

[0043] Among them, the bonding terminals 12 are arranged parallel to each other and at intervals on the first surface 111 of the substrate 11. Thus, it is possible to avoid short circuits formed by contact between adjacent bonding terminals 12. In this embodiment, one end of the bonding terminal 12 is electrically connected to the thin film transistor device in the driving layer of the display panel 1.

[0044] Among them, the bonding terminal 12 includes a first bonding terminal 121 and a second bonding terminal 122 arranged alternately. In this embodiment, the first bonding terminal 121 and the second bonding terminal 122 are made of the same material. In this embodiment, both the first bonding terminal 121 and the second bonding terminal 122 are formed by one wire. In other embodiments, the first bonding terminal 121 may be formed by multiple wires, and the second bonding terminal 122 may also be formed by multiple wires.

[0045] Among them, the first grooves 13 are arranged at intervals on the side printing surface 112 of the substrate 11. The first grooves 13 correspond one-to-one to the first bonding terminals 121. That is, each of the first grooves corresponds to one of the first bonding terminals 121. A first protrusion 16 is formed between any two adjacent first grooves 13. The two side walls of the first groove 13 are respectively reused as the side walls of the two first protrusions 16 adjacent to the first groove 13.

[0046] Among them, the first grooves 13 can be fabricated by methods such as laser cutting, water jet cutting, dry etching, or wet etching.

[0047] Among them, the shapes and sizes of any two of the first grooves 13 are the same, and the widths L of any two of the first protrusions 16 are the same. Thus, the difficulty of the preparation process of the first grooves 13 can be reduced.

[0048] Among them, the first conductor 14 is disposed on the substrate 11 at the bottom surface of the first groove 13. The first conductor 14 corresponds one-to-one to the first groove 13 and is connected one-to-one to the first bonding terminal 121. That is, the first conductor 14, the first groove 13, and the first bonding terminal 121 maintain a one-to-one correspondence with each other. In this embodiment, the material of the first conductor 14 is silver paste. In other embodiments, the first conductor 14 can be a conductive liquid made of other materials.

[0049] Among them, the second conductor 15 is disposed on the substrate 11 at the top surface of the first protrusion 16. The second conductor 15 corresponds one-to-one to the first protrusion 16 and is connected one-to-one to the second bonding terminal 122. The material of the second conductor 15 in this embodiment is the same as the material of the first conductor 14. Thus, the printing device can simultaneously fabricate the first conductor 14 and the second conductor 15, improving the printing efficiency and reducing the preparation cost. The first conductor 14 and the second conductor 15 of the present invention are not in the same plane, which can reduce the risk of short circuit between the first conductor 14 and the second conductor 15.

[0050] Among them, any one of the first conductors 14 and any one of the second conductors 15 are not electrically connected to each other. Thus, a short circuit phenomenon between the first conductor 14 and the second conductor 15 is prevented.

[0051] As Figure 5 shown, this embodiment provides a printing device 2 for fabricating the display panel 1 of the present invention. The printing device 2 includes: a main body 21, a second groove 22, a first printing head 23, a second printing head 24, a hydrophobic and oleophobic layer 25, and a second protrusion 26.

[0052] Among them, a plurality of second grooves 22 are arranged at intervals on the surface of one side of the body 21; a second protrusion 26 is formed between any two adjacent second grooves 22. Among them, the two side walls of the second groove 22 are respectively reused as the side walls of the two second protrusions 26 adjacent to the second groove 22.

[0053] Among them, a plurality of first printing heads 23 are installed on the body 21 on the top surface of the second protrusion 26; the first printing heads 23 correspond to the second protrusions 26 one by one.

[0054] Among them, a plurality of second printing heads 24 are installed on the body 21 on the bottom surface of the second groove 22; the second printing heads 24 correspond to the second grooves 22 one by one.

[0055] Among them, a plurality of hydrophobic and oleophobic layers 25 are arranged on the two side walls of each second groove 22. The hydrophobic and oleophobic layer 25 is mainly used to prevent the two side walls of the second groove 22 from being dipped with conductive liquid, resulting in a short circuit between the first conductor 14 and the second conductor 15. Among them, the material of the hydrophobic and oleophobic layer 25 depends on the material of the conductive liquid. In this embodiment, the conductive liquid is an oily silver paste, and the oily silver paste shows lipophilicity. For this kind of silver paste, the material of the hydrophobic and oleophobic layer 25 can be: metal phosphate, metal polyphosphate compound, etc. In other embodiments, the conductive liquid can be a water-based silver paste, and the water-based silver paste shows lipophilicity. For this kind of silver paste, the material of the hydrophobic and oleophobic layer 25 can be: polytetrafluoroethylene, fluorinated polyethylene, etc.

[0056] Such as Figure 6 、 Figure 7As shown in the figure, the present invention also provides a method for manufacturing a display panel 1, which includes the following steps: S10: Provide a substrate 11, the substrate 11 includes a first surface 111 and a side printing surface 112 perpendicular to the first surface 111; S20: Prepare a plurality of bonding terminals 12 that are parallel to and spaced from each other on the first surface 111 of the substrate 11, the bonding terminals 12 include first bonding terminals 121 and second bonding terminals 122 that are alternately arranged; S30: Arrange a plurality of first grooves 13 at intervals on the side printing surface 112 of the substrate 11, the first grooves 13 correspond to the first bonding terminals 121 one by one; a first protrusion 16 is formed between any two adjacent first grooves 13; and S40: Use the printing device 2 of the present invention to form a first conductor 14 on the substrate 11 at the bottom of the first groove 13, and form a second conductor 15 on the substrate 11 at the top surface of the first protrusion 16, the first conductor 14 corresponds to the first groove 13 one by one, and the first conductor 14 is connected to the first bonding terminal 121 one by one; the second conductor 15 corresponds to the first protrusion 16 one by one, the second conductor 15 is connected to the second bonding terminal 122 one by one, and any one of the first conductors and any one of the second conductors are not electrically connected to each other.

[0057] By cooperating the printing device 2 with the display panel 1, the present invention can increase the widths of the first conductor 14 and the second conductor 15, and reduce the risk of open circuits between the first conductor 14 and the first bonding terminal 121, and between the second conductor 15 and the second bonding terminal 122. The first conductor 14 and the second conductor 15 of the present invention are not in the same plane, which can reduce the risk of short circuits between the first conductor 14 and the second conductor 15. The process of the present invention is simple, and the printing device 2 has strong compatibility.

[0058] Step S40 further includes: First, arrange a hydrophobic and oleophobic layer 25 on two side walls of each second groove 22, and then use the printing device 2 to dip the conductive liquid, align the first printing head 23 with the first groove 13, press the body 21, and print the conductive liquid on the first printing head 23 onto the substrate 11 at the bottom of the first groove 13 to form the first conductor 14, and print the conductive liquid on the second printing head 24 onto the substrate 11 at the top surface of the first protrusion 16 to form the second conductor 15.

[0059] When pressing the body 21 in step S40, the first protrusion 16 is fitted into the second groove 22, and the second protrusion 26 and the second printing head 24 are fitted into the first groove 13.

[0060] As Figure 8As shown, this embodiment further provides a splicing display device 3, which is formed by splicing a plurality of display panels 1 of this embodiment. The splicing display device 3 includes a splicing seam 31 located between two adjacent display panels.

[0061] As Figure 8 shown, the splicing seam 31 of this embodiment is a concave-convex line. Since the user's sensitivity to the contour of the concave-convex line is lower than that to a straight line; and the user is accustomed to observing from left to right and from top to bottom, the splicing seam 31 of this embodiment requires a longer observation time and more information, so the time to discover the splicing seam 31 is longer. Therefore, when the display panels 1 of the present invention are spliced, the splicing seam 31 is less obvious, which is beneficial to improving the user experience of the splicing display device 3.

[0062] Furthermore, the above has introduced in detail a display panel, a printing device, and a method for manufacturing a display panel provided by this application. Specific examples are used in this article to elaborate on the principle and implementation manner of this application. The description of the above embodiments is only used to help understand the method and its core idea of this application; at the same time, for those skilled in the art, according to the idea of this application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to this application.

Claims

1. A display panel, characterized in that, Comprising: A substrate, which includes a first surface and a side printing surface perpendicular to the first surface; A plurality of bonding terminals, arranged parallel to each other and spaced on the first surface of the substrate; the bonding terminals include alternately arranged first bonding terminals and second bonding terminals; A plurality of first grooves, spaced on the side printing surface of the substrate, the first grooves corresponding to the first bonding terminals one by one; a first protrusion is formed between any two adjacent first grooves, and two side walls of the first groove are respectively reused as the side walls of two first protrusions adjacent to the first groove; A plurality of first conductors, arranged on the substrate at the bottom surface of the first groove, the first conductors corresponding to the first grooves one by one, and connected to the first bonding terminals one by one; And, A plurality of second conductors, arranged on the substrate at the top surface of the first protrusion, the second conductors corresponding to the first protrusions one by one, and connected to the second bonding terminals one by one; Any one of the first conductors is not electrically connected to any one of the second conductors.

2. The display panel according to claim 1, wherein The material of the first conductor is the same as that of the second conductor.

3. The display panel according to claim 1, wherein The shapes and sizes of any two first grooves are the same.

4. The display panel according to claim 1, wherein The widths of any two first protrusions are the same.

5. A printing device, characterized in that, For preparing the display panel according to any one of claims 1-4, the printing device includes: A main body; A plurality of second grooves, spaced on the surface of one side of the main body; a second protrusion is formed between any two adjacent second grooves; A plurality of first printing heads, mounted on the main body at the top surface of the second protrusion; the first printing heads corresponding to the second protrusions one by one; and A plurality of second printing heads, mounted on the main body at the bottom surface of the second groove; the second printing heads corresponding to the second grooves one by one.

6. The printing device according to claim 5, characterized in that, Further comprising: A plurality of hydrophobic and oleophobic layers, arranged on two side walls of each second groove.

7. The printing apparatus according to claim 6, wherein The material of the hydrophobic and oleophobic layer includes: one or more of metal phosphate, metal polyphosphate compound, polytetrafluoroethylene, and fluorinated polyethylene.

8. A method for manufacturing a display panel, characterized in that, Including the following steps: Providing a substrate, the substrate including a first surface and a side printing surface perpendicular to the first surface; Preparing a plurality of bonding terminals parallel to each other and spaced on the first surface of the substrate, the bonding terminals including alternately arranged first bonding terminals and second bonding terminals; Spacedly arranging a plurality of first grooves on the side printing surface of the substrate, the first grooves corresponding to the first bonding terminals one by one; a first protrusion is formed between any two adjacent first grooves; And Using the printing device according to any one of claims 5-7 to form a first conductor on the substrate at the bottom surface of the first groove and a second conductor on the substrate at the top surface of the first protrusion, the first conductors corresponding to the first grooves one by one, the first conductors being connected to the first bonding terminals one by one; The second conductors corresponding to the first protrusions one by one, the second conductors being connected to the second bonding terminals one by one; any one of the first conductors is not electrically connected to any one of the second conductors.

9. The manufacturing method of the display panel according to claim 8, characterized in that, The step of forming a first conductor on the substrate on the bottom surface of the first groove and forming a second conductor on the substrate on the top surface of the first protrusion further includes: First, a hydrophobic and oleophobic layer is provided on two side walls of each of the second grooves, and then the printing device is used to dip the conductive liquid. The first printing head is aligned with the first groove, the body is pressed, and the conductive liquid on the first printing head is printed onto the substrate on the bottom surface of the first groove to form the first conductor, and the conductive liquid on the second printing head is printed onto the substrate on the top surface of the first protrusion to form the second conductor.

10. The manufacturing method of the display panel according to claim 9, wherein, When the body is pressed, the first protrusion is fitted into the second groove, and the second protrusion and the second printing head are fitted into the first groove.

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