Display panel, manufacturing method thereof and mobile terminal

Abstract

The present invention discloses a display panel, a preparation method thereof and a mobile terminal. The display panel comprises: a panel body, comprising a substrate; binding terminals, comprising a plurality of first binding terminals arranged on the front side of the substrate, and a plurality of second binding terminals arranged on the back side of the substrate; a plurality of routing wires, any one of the routing wires electrically connecting a first binding terminal with a corresponding second binding terminal; and a plurality of isolation belts, one of the isolation belts being arranged between any two adjacent routing wires, wherein by adding isolation belts between the routing wires, wire drawing burrs generated during the preparation process of adjacent routing wires can be effectively isolated, thereby avoiding poor display caused by short circuit of adjacent wires, and also effectively avoiding the problem of connection failure caused by position offset of the routing wires on the front and back sides.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a method for preparing the same, and a mobile terminal. Background Art

[0002] Compared with the liquid crystal display panels and organic light-emitting display panels that are currently in mass production, miniature light-emitting diode (Mini LED) display panels and mini light-emitting diode (Micro LED) display panels have the advantages of fast response, high color gamut, high resolution, and low energy consumption. They have become one of the current research hotspots in the display field.

[0003] In Mini LED and Micro LED display technologies, small-sized display panels can usually be spliced ​​to achieve large-sized displays. In order to achieve seamless splicing, a double-sided process is usually used, that is, the thin-film transistor layer and LED lamp beads are placed on the front of the backplane, and the binding area is placed on the back of the backplane. By making wires on the front, side and back of the backplane, the binding terminals on the front and back sides are connected. However, in the process of making side wires, due to the small wire spacing, when the position of the front and back wires is offset, it is easy to cause abnormal wiring conduction. At the same time, wire drawing and burrs can easily cause short circuits between adjacent wires, resulting in poor display. Summary of the invention

[0004] The present invention provides a display panel, a manufacturing method thereof, and a mobile terminal.

[0005] In order to solve the above problems, in a first aspect, the present invention provides a display panel, comprising:

[0006] The panel body includes a substrate;

[0007] Binding terminals, including a plurality of first binding terminals arranged on the front side of the substrate, and a plurality of second binding terminals arranged on the back side of the substrate;

[0008] a plurality of wirings, any one of the wirings electrically connecting a first binding terminal and a corresponding second binding terminal; and

[0009] A plurality of isolation belts are provided, and an isolation belt is provided between any two adjacent routing lines.

[0010] In a display panel provided in one embodiment of the present invention, the isolation zone includes a first isolation portion arranged on the front side of the substrate, a second isolation portion arranged on the side of the substrate, and a third isolation portion arranged on the back side of the substrate, and the second isolation portion connects the first isolation portion and the third isolation portion.

[0011] In a display panel provided in an embodiment of the present invention, one end of the first isolation portion away from the second isolation portion extends between the two first terminals, and / or one end of the third isolation portion away from the second isolation portion extends between the two second terminals.

[0012] In the display panel provided in one embodiment of the present invention, the width of the first isolation portion is less than one-third of the distance between two adjacent first binding terminals and greater than one-fifth of the distance between two adjacent first binding terminals, and / or the width of the third isolation portion is less than one-third of the distance between two adjacent second binding terminals and greater than one-fifth of the distance between two adjacent second binding terminals.

[0013] In the display panel provided by an embodiment of the present invention, the height of the isolation zone is greater than the height of the wiring.

[0014] In the display panel provided by an embodiment of the present invention, the display panel further includes a black matrix layer disposed on the substrate, and the black matrix layer is disposed in the same layer as the first isolation portion.

[0015] In the display panel provided by an embodiment of the present invention, the display panel further includes a planarization layer disposed on the substrate, and the planarization layer is disposed in the same layer as the first isolation portion.

[0016] In the display panel provided by an embodiment of the present invention, a taper angle formed by the side wall of the isolation zone and the substrate is greater than 70 degrees.

[0017] In a second aspect, the present invention provides a method for preparing a display panel, the method comprising the following steps:

[0018] S10: providing a panel body, including a substrate, forming binding terminals on the substrate, including a plurality of first binding terminals arranged on the front side of the substrate, and a plurality of second binding terminals arranged on the back side of the substrate;

[0019] S20: forming a plurality of isolation strips on the substrate; and

[0020] S30: forming a plurality of wirings at gaps between the plurality of isolation bands, wherein any one of the wirings electrically connects a first binding terminal and a corresponding second binding terminal.

[0021] In a third aspect, the present invention provides a mobile terminal, comprising the aforementioned display panel and a terminal body, wherein the terminal body and the display panel are integrated into one.

[0022] Beneficial effect: The present invention provides a display panel, a preparation method thereof and a mobile terminal, wherein the display panel comprises: a panel body, comprising a substrate; binding terminals, comprising a plurality of first binding terminals arranged on the front side of the substrate, and a plurality of second binding terminals arranged on the back side of the substrate; a plurality of routing lines, any one of the routing lines electrically connecting a first binding terminal with a corresponding second binding terminal; and a plurality of isolation belts, wherein an isolation belt is arranged between any two adjacent routing lines, wherein by adding isolation belts between the routing lines, the brushing burrs generated during the preparation process of the adjacent routing lines can be effectively isolated, thereby avoiding poor display caused by short circuit of adjacent wires, and also effectively avoiding the problem of connection failure caused by position offset of the routing lines on the front and back sides. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 is a schematic diagram of a top view structure of a display panel provided by an embodiment of the present invention;

[0025] Figure 2 is a schematic diagram of a cross-sectional structure of a display panel at position A1-A2 provided by an embodiment of the present invention;

[0026] Figure 3 is a schematic diagram of a cross-sectional structure of a display panel at a position B1-B2 provided by an embodiment of the present invention;

[0027] Figure 4 is a schematic diagram of a side view structure of a display panel provided by an embodiment of the present invention;

[0028] Figure 5 is a schematic diagram of a cross-sectional structure of a display panel at a position C1-C2 provided by an embodiment of the present invention;

[0029] Figure 6 is a text flow diagram of a method for preparing a display panel provided by an embodiment of the present invention;

[0030] Figure 7a-7c It is a structural flow diagram of a method for preparing a display panel provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0033] In this application, the word "exemplary" is used to mean "serving as an example, illustration, or illustration." Any embodiment described in this application as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. The following description is given to enable any person skilled in the art to implement and use the invention. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the invention can be implemented without using these specific details. In other instances, well-known structures and processes are not elaborated in detail to avoid obscuring the description of the invention with unnecessary details. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in this application.

[0034] An embodiment of the present invention provides a display panel, which is combined with Figure 1 and Figure 2 Detailed description is given below. Figure 1 is a schematic diagram of a top view of the structure of the display panel, Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the A1-A2 position.

[0035] Specifically, the display panel includes a panel body, which includes a substrate 110, binding terminals 120, a plurality of traces 130 and a plurality of isolation strips 140;

[0036] The binding terminals 120 include a plurality of first binding terminals 121 disposed on the front side of the substrate 110, and a plurality of second binding terminals 122 disposed on the back side of the substrate 110. The first binding terminals 121 are disposed in the frame area on the front side of the substrate 110 and are electrically connected to the signal traces (not shown in the figure) drawn from the display area. The second binding terminals 122 are disposed in the area on the back side of the substrate 110 relative to the first binding terminals 121 and are used to bind an external driver chip, such as a chip on film (COF).

[0037] One end of the wiring 130 is electrically connected to a first binding terminal 121, and extends from the front side of the substrate 110 to the side, and then extends to the back side to be electrically connected to the corresponding second binding terminal 122, so as to achieve electrical conduction;

[0038] An isolation zone 140 is disposed between any two adjacent wirings 130 , and the wirings 130 are insulated from the isolation zone 140 .

[0039] Among them, in the existing preparation process, the wiring 130 is usually formed on the front, side and back of the substrate 110 through a transfer process. During the formation process, burrs and wiredrawing are prone to occur. When the spacing between adjacent wirings 130 is too narrow, a short circuit will occur, resulting in poor display. By setting the isolation belt 140 between two adjacent wirings 130, the burrs and wiredrawing that may be formed between adjacent wirings 130 during the formation of the wiring 130 can be effectively blocked, thereby avoiding poor display caused by short circuits between adjacent wirings 130. On the other hand, the resolution requirements of current display panels are getting higher and higher, resulting in a smaller spacing between the wirings 130. When forming the wiring 130, the wiring positions on the front and back sides may be offset to a certain extent, thereby causing a short circuit. By setting the isolation belt 140 at the corresponding position between adjacent wirings 130 in advance, the occurrence of adjacent wiring short circuits caused by wiring offset can also be effectively avoided.

[0040] It should be supplemented that, in the embodiment of the present invention, the panel body refers to the main structure used in the display panel for realizing display, including the substrate and other film layer structures for realizing display, such as a thin film transistor layer, etc.; the front side of the substrate refers to the surface along the light emitting direction of the display panel, the back side of the substrate refers to the surface opposite to the front side, and the side surface of the substrate refers to the surface corresponding to the thickness direction of the substrate.

[0041] Further, in some embodiments, see Figure 3 Provided Figure 1 The schematic diagram of the cross-sectional structure of the display panel along the B1-B2 position shows that the isolation zone includes a first isolation portion 141 arranged on the front side of the substrate 110, a second isolation portion 142 arranged on the side of the substrate, and a third isolation portion 143 arranged on the back side of the substrate. The second isolation portion 142 connects the first isolation portion 141 and the third isolation portion 143 to form a whole, which can completely isolate the intervals between adjacent wirings, minimize the risk of short circuit between adjacent wirings, and avoid poor display.

[0042] In a specific embodiment, one end of the first isolation portion away from the second isolation portion extends to between the two first terminals, so that the first isolation portion can completely isolate two adjacent traces. The specific structure can be referred to in Figure 1 Correspondingly, one end of the third isolation portion away from the second isolation portion extends to between the two second terminals.

[0043] In some embodiments, the width of the isolation zone needs to be controlled within a certain range. On the one hand, in order to ensure a good barrier effect, the isolation zone needs to ensure a certain width. On the other hand, the width of the isolation zone should not be too large, otherwise it is easy to cause interference with adjacent structures, such as binding terminals, thereby causing poor binding. Based on this, it is verified that the width of the first isolation portion is less than one-third of the spacing between two adjacent first binding terminals, and greater than one-fifth of the spacing between two adjacent first binding terminals. Correspondingly, the third isolation portion is less than one-third of the spacing between two adjacent second binding terminals, and greater than one-fifth of the spacing between two adjacent second binding terminals.

[0044] Furthermore, in some embodiments, in order to ensure the partition effect of the isolation belt 140, the isolation belt 140 also needs to ensure a certain height. It has been verified that the height of the isolation belt 140 should be at least greater than the height of the wiring 130, which can effectively avoid the display defect caused by the short circuit of the wiring 130. For details, please refer to Figure 4 A schematic diagram of the side structure of the display panel relative to the binding terminal is provided. Of course, in actual applications, the height of the isolation band 140 should not be too large, otherwise it will cause higher production costs. In actual applications, the height of the isolation band 140 is 3-20 microns, which is set according to actual process requirements.

[0045] In some embodiments, the isolation zone needs to be made of an insulating material to avoid conduction with the adjacent wiring. Usually, an organic insulating material conventionally used in the art can be used. Furthermore, the display panel also includes an organic insulating film layer arranged on the substrate, such as a planarization layer, a black matrix layer, etc. Therefore, the first isolation portion in the isolation zone arranged on the front side of the substrate can be arranged in the same layer as the organic insulating film layer, that is, the first isolation portion can be formed by the same process as at least one of the film layers such as the planarization layer and the black matrix layer. Compared with the conventional preparation process of the display panel, there is no need to add a new preparation process, and it can be achieved by modifying the mask used in the corresponding exposure process, without increasing the preparation cost.

[0046] In some embodiments, the isolation effect of the isolation belt can be further enhanced by adjusting the cross-sectional morphology of the isolation belt. Specifically, the steeper the taper angles at both ends of the isolation belt, the better the adjacent traces can be isolated to prevent them from short-circuiting. In a specific application, the taper angle α formed by the side wall of the isolation belt 140 and the substrate 110 is greater than 70 degrees. For details, please refer to Figure 5 Provided Figure 1 The cross-sectional structure diagram of the display panel along the C1-C2 position, of course, in addition to the first isolation portion 141 and the third isolation portion 143 shown in the figure having a cone angle α greater than 70 degrees, the cone angle of the second isolation portion arranged on the side wall of the substrate 110 is also greater than 70 degrees.

[0047] Furthermore, when the taper angle α formed by the side wall of the isolation zone 140 and the substrate 110 is 90 degrees, the best isolation effect is achieved.

[0048] It should be noted that the above display panel embodiment only describes the above structure. It can be understood that, in addition to the above structure, the display panel in the embodiment of the present invention may also include any other necessary structures as needed, such as an array driving layer arranged in the display area on the substrate, a light-emitting device layer, etc., which are not specifically limited here.

[0049] Another embodiment of the present invention provides a method for preparing a display panel, as follows: Figure 6 A text flow diagram of the preparation method is provided, and Figure 7a-7c The structural flow diagram of the preparation method is provided for description.

[0050] Specifically, the preparation method comprises the following steps:

[0051] S10: Provide a panel body, including a substrate 110, and form binding terminals 120 on the substrate 110, including a plurality of first binding terminals 121 arranged on the front side of the substrate 110, and a plurality of second binding terminals (not shown in the figure) arranged on the back side of the substrate 110, that is, form Figure 7a The structure shown;

[0052] S20: forming a plurality of isolation bands 140 on the substrate 110, that is, forming Figure 7b In the structure shown, specifically, the plurality of isolation strips 140 are arranged in parallel and are sequentially disposed at the gap between two adjacent binding terminals 120;

[0053] S30: A plurality of wirings 130 are formed correspondingly at the gaps between the plurality of isolation bands 140, any of the wirings 130 electrically connects a first binding terminal 121 with a corresponding second binding terminal (not shown in the figure), and is spaced and insulated from the adjacent isolation bands, that is, forming a wiring 130 as shown in FIG. Figure 7c The structure shown.

[0054] In the method for preparing the display panel provided in this embodiment, by pre-forming the raised isolation belt in the wiring spacing area before forming the wiring, the barrier effect of the isolation belt can effectively avoid poor display caused by short circuit between adjacent wirings during the wiring formation process.

[0055] In some embodiments, in the step S20, the step of forming a plurality of isolation strips 140 includes: forming an insulating film on the substrate, and performing an exposure and development process on the insulating film to form a predetermined pattern.

[0056] Another embodiment of the present invention provides a mobile terminal, including the display panel and terminal body described in the aforementioned embodiment, the terminal body and the display panel are combined into one, the terminal body may include a middle frame, frame glue, etc., the mobile terminal may be a mobile display terminal such as a mobile phone, a tablet, etc., and the embodiment of the present invention is not limited to this.

[0057] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the detailed description of other embodiments above, and will not be repeated here.

[0058] The above is a detailed introduction to a display panel, a preparation method thereof, and a mobile terminal provided in an embodiment of the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A display panel, characterized in that: The display panel comprises: The panel body includes a substrate; Binding terminals, including a plurality of first binding terminals arranged on the front side of the substrate, and a plurality of second binding terminals arranged on the back side of the substrate; a plurality of wirings, any one of the wirings electrically connecting a first binding terminal and a corresponding second binding terminal; and A plurality of isolation belts, wherein one isolation belt is provided between any two adjacent routing lines; The isolation zone includes a first isolation portion disposed on the front side of the substrate, a second isolation portion disposed on the side of the substrate, and a third isolation portion disposed on the back side of the substrate, wherein the second isolation portion connects the first isolation portion and the third isolation portion; One end of the first isolation portion away from the second isolation portion extends between the two first binding terminals; One end of the third isolation portion away from the second isolation portion extends between the two second binding terminals.

2. The display panel according to claim 1, characterized in that: The width of the first isolation portion is less than one-third of the distance between two adjacent first binding terminals and greater than one-fifth of the distance between two adjacent first binding terminals, and / or the width of the third isolation portion is less than one-third of the distance between two adjacent second binding terminals and greater than one-fifth of the distance between two adjacent second binding terminals.

3. The display panel according to claim 1, characterized in that: The height of the isolation zone is greater than the height of the routing line.

4. The display panel according to claim 1, characterized in that: The display panel further includes a black matrix layer disposed on the substrate, and the black matrix layer is disposed on the same layer as the first isolation portion.

5. The display panel according to claim 1, characterized in that: The display panel further includes a planarization layer disposed on the substrate, and the planarization layer is disposed on the same layer as the first isolation portion.

6. The display panel according to claim 1, characterized in that: A taper angle formed by a side wall of the isolation zone and the substrate is greater than 70 degrees.

7. A method for preparing a display panel, characterized in that: The preparation method comprises the following steps: S10: providing a panel body, including a substrate, forming binding terminals on the substrate, including a plurality of first binding terminals arranged on the front side of the substrate, and a plurality of second binding terminals arranged on the back side of the substrate; S20: forming a plurality of isolation strips on the substrate, wherein the isolation strips include a first isolation portion disposed on the front side of the substrate, a second isolation portion disposed on the side of the substrate, and a third isolation portion disposed on the back side of the substrate, the second isolation portion connects the first isolation portion and the third isolation portion, one end of the first isolation portion away from the second isolation portion extends between the two first binding terminals, and one end of the third isolation portion away from the second isolation portion extends between the two second binding terminals; and, S30: forming a plurality of wirings corresponding to the gaps between the plurality of isolation bands, wherein any one of the wirings electrically connects a first binding terminal and a corresponding second binding terminal.

8. A mobile terminal, characterized in that: The invention comprises a display panel and a terminal body as claimed in any one of claims 1 to 6, wherein the terminal body and the display panel are integrated into one body.

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