Shielding structure and display device

Abstract

The invention provides a shielding structure and a display device, and relates to the technical field of display, the shielding structure comprises at least one device area and a non-device area surrounding the device area; a plurality of components are arranged in the circuit board, and the orthographic projection of the component area and the orthographic projection of at least one component on the circuit board are overlapped; the device region comprises a first shielding part; the non-device region comprises a first bonding layer and a second shielding part located on one side of the first bonding layer; the first bonding layer is located between the second shielding part and the circuit board; the first shielding part and the second shielding part are fixed together; in the normal direction of the circuit board, the average distance between the first shielding part and the reference surface is larger than the average distance between the second shielding part and the reference surface, and the reference surface is the plane where the surface, away from the second shielding part, of the first bonding layer is located. According to the shielding structure, the first shielding part is arranged, so that when the shielding structure is applied to the circuit board, the condition that components in the circuit board burst the electromagnetic shielding film can be improved.

Description

Technical Field

[0001] The present application relates to the field of displays, and in particular, to a shielding structure and a display device. Background Art

[0002] In the display industry, in order to optimize and solve the EMI (Electromagnetic Interference) problem, electromagnetic shielding films are a commonly used solution. However, in some display products, the components in the circuit board have a certain height, and the components have sharp corners, and it is very easy for the components to pierce through the electromagnetic shielding film, resulting in contact between the circuit board and the conductive structure in the electromagnetic shielding film, thereby causing abnormal display. Summary of the Invention

[0003] The present application provides a shielding structure and a display device. By providing a first shielding portion, when the shielding structure is applied to a circuit board, the situation that components in the circuit board pierce through the electromagnetic shielding film can be improved.

[0004] Embodiments of the present application adopt the following technical solutions:

[0005] In a first aspect, an embodiment of the present application provides a shielding structure applied to a circuit board. The shielding structure includes at least one device area and a non-device area surrounding the device area; a plurality of components are provided in the circuit board, and the device area overlaps with the orthographic projection of at least one of the components on the circuit board.

[0006] The device area includes a first shielding portion.

[0007] The non-device area includes a first adhesive layer and a second shielding portion on one side of the first adhesive layer; the first adhesive layer is located between the second shielding portion and the circuit board; the first shielding portion and the second shielding portion are fixed together.

[0008] Wherein, along the normal direction of the circuit board, the average distance between the first shielding portion and a reference plane is greater than the average distance between the second shielding portion and the reference plane, and the reference plane is the plane where the surface of the first adhesive layer away from the second shielding portion is located.

[0009] In some shielding structures provided by embodiments of the present application, there is a gap between the first shielding portion and the reference plane.

[0010] In some shielding structures provided by embodiments of the present application, the cross-section of the first shielding portion along the direction perpendicular to the reference plane is a bent structure.

[0011] In some shielding structures provided by the embodiments of the present application, the space between the first shielding portion and the reference plane includes at least one row of triangular prisms connected together; wherein, the first side surfaces of the triangular prisms are coplanar, and the side walls of the first side surfaces in each triangular prism are connected.

[0012] In some shielding structures provided by the embodiments of the present application, the space between the first shielding portion and the reference plane includes at least one row of quadrangular pyramids connected together; wherein, the bottom surfaces of the quadrangular pyramids are coplanar, and the sides of the bottom surfaces of the quadrangular pyramids are connected.

[0013] In some shielding structures provided by the embodiments of the present application, the shape of the orthographic projection of the first shielding portion on the reference plane includes at least one row of rectangles arranged side by side, the extending direction of the long side of the rectangle is the first direction or the second direction, and the first direction and the second direction intersect.

[0014] In some shielding structures provided by the embodiments of the present application, the first shielding portion and the second shielding portion are an integral structure.

[0015] In some shielding structures provided by the embodiments of the present application, along the normal direction of the circuit board, the minimum distance between the first shielding portion and the reference plane is greater than or equal to the minimum distance between the surface of the second shielding portion away from the first adhesive layer and the reference plane.

[0016] In some shielding structures provided by the embodiments of the present application, the shielding structure further includes a second adhesive layer, the second adhesive layer is disposed in a partial area of the surface of the second shielding portion away from the first adhesive layer, and the first shielding portion and the second shielding portion are fixed together through the second adhesive layer.

[0017] In a second aspect, embodiments of the present application provide a display device, which includes a circuit board, a display panel, and the shielding structure according to any one of the first aspect;

[0018] The circuit board and the display panel are electrically connected, and the circuit board is disposed on the back surface of the display panel, and the shielding structure is located on the side of the circuit board away from the display panel.

[0019] Embodiments of the present application provide a shielding structure and a display device, which are applied to a circuit board. The shielding structure includes at least one device area and a non-device area surrounding the device area; a plurality of components are provided in the circuit board, and the device area overlaps with the orthographic projection of at least one component on the circuit board; the device area includes a first shielding portion; the non-device area includes a first bonding layer and a second shielding portion located on one side of the first bonding layer; the first bonding layer is located between the second shielding portion and the circuit board; the first shielding portion and the second shielding portion are fixed together; wherein, along the normal direction of the circuit board, the average distance between the first shielding portion and a reference plane is greater than the average distance between the second shielding portion and the reference plane, and the reference plane is the plane where the surface of the first bonding layer away from the second shielding portion is located.

[0020] In the embodiments of the present application, by providing at least one device area in the shielding structure, the device area includes a first shielding portion, and the device area overlaps with the orthographic projection of at least one component on the circuit board. In addition, the average distance between the first shielding portion and the reference plane along the normal direction of the circuit board is greater than the average distance between the second shielding portion and the reference plane; in this way, when the shielding structure is applied to the circuit board, since the average distance between the first shielding portion and the reference plane is greater than the average distance between the second shielding portion and the reference plane, extra space is reserved for the components of the circuit board, which can greatly improve the situation that the components in the circuit board pierce through the electromagnetic shielding film, and thus ensure the normal display of the display device.

[0021] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. In addition, in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specifically describes the specific embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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 following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 and Figure 2 are cross-sectional structure schematic diagrams of two shielding structures provided by the embodiments of the present application;

[0024] Figures 3 to 6 are top-view structure schematic diagrams of four shielding structures provided by the embodiments of the present application;

[0025] Figure 7 is a cross-sectional structure schematic diagram of a shielding structure provided by the embodiments of the present application applied to a circuit board;

[0026] Figure 8 An explanatory diagram of the distances between a first shielding portion and a second shielding portion and a reference plane respectively provided for an embodiment of the present application. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0028] Unless otherwise required by the context, throughout the specification and claims, the term "comprising" is interpreted in an open, inclusive sense, i.e., "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples" or "some examples" etc. are intended to indicate that specific features, structures, materials or characteristics related to the embodiment or example are included in at least one embodiment or example of the present application. The schematic representations of the above terms are not necessarily referring to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0029] In the embodiments of the present application, the same items or similar items with basically the same functions and effects are partially named with words such as "first" and "second" only for clearly describing the technical solutions of the embodiments of the present application, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features.

[0030] Features such as "parallel", "perpendicular" and "same" used in the embodiments of the present application include the strict sense of "parallel", "perpendicular", "same" and other features, as well as situations with certain errors such as "substantially parallel", "substantially perpendicular", "substantially the same", etc. Considering measurement and errors related to the measurement of specific quantities (for example, limitations of the measurement system), it means within the acceptable deviation range for a specific value determined by those of ordinary skill in the art. For example, "substantially" can mean within one or more standard deviations, or within 10% or 5% of the value. "At least one" means one or more, and "a plurality" means at least two.

[0031] In the embodiments of the present application, "same layer" refers to the relationship between multiple film layers formed from the same material after the same step (such as a single patterning process). Here, "same layer" does not always mean that the thicknesses of the multiple film layers are the same or that the heights of the multiple film layers in a cross-sectional view are the same. In this specification, polygons are not strictly defined and can be approximate triangles, parallelograms, trapezoids, pentagons, hexagons, etc., and there may be some small deformations due to tolerances.

[0032] In this specification, "electrically connected" and "coupled" include cases where components are connected together through an element having a certain electrical effect. There are no particular limitations on the "element having a certain electrical effect" as long as it can transfer electrical signals between the components to be connected. Examples of the "element having a certain electrical effect" include not only electrodes and wirings, but also switching elements such as transistors, resistors, inductors, capacitors, and other elements having various functions.

[0033] In the display industry, to optimize and improve the solution to electromagnetic interference problems, the current mainstream design solution is to use an electromagnetic shielding tape (EMI tape), and stick the electromagnetic shielding tape on the surface of components arranged in materials such as circuit boards to achieve the electromagnetic shielding function.

[0034] However, during use, especially in in-vehicle display products, since components such as capacitance and resistance components on the surface of this type of circuit board, such as a PCB (Printed Circuit Board), have a certain height and sharp edges. Sometimes, the edge corners of the components pierce through the insulating layer in the electromagnetic shielding tape, and then expose the shielding layer (such as a braided copper layer) in the electromagnetic shielding tape. In this way, the shielding layer in the electromagnetic shielding tape is extremely likely to come into contact with the components, affecting the display function of the display device.

[0035] Based on this, the embodiments of the present application provide a shielding structure and a display device, which are applied to a circuit board. The shielding structure is provided with at least one device area, the device area includes a first shielding part, the device area overlaps with the orthographic projection of at least one component on the circuit board. In addition, the average distance from the first shielding part to a reference plane in the normal direction of the circuit board is greater than the average distance from the second shielding part to the reference plane; in this way, when the shielding structure is applied to the circuit board, since the average distance from the first shielding part to the reference plane is greater than the average distance from the second shielding part to the reference plane, extra space is reserved for the components on the circuit board, which can greatly improve the situation where the components on the circuit board pierce through the electromagnetic shielding film, and thus ensure the normal display of the display device.

[0036] The following specifically introduces and describes the embodiments of the present application with reference to the drawings.

[0037] Embodiments of the present application provide a shielding structure, which is applied to a circuit board, such as Figure 1 or Figure 2 shown. The shielding structure includes at least one device area A and a non-device area B surrounding the device area A; a plurality of components are arranged in the circuit board, and the device area A overlaps with the orthographic projection of at least one component on the circuit board;

[0038] such as Figure 1 or Figure 2 shown, the device area A includes a first shielding part 1;

[0039] The non-device area B includes a first bonding layer 3 and a second shielding part 2 located on one side of the first bonding layer 3; the first bonding layer 3 is located between the second shielding part 2 and the circuit board; the first shielding part 1 and the second shielding part 2 are fixed together;

[0040] Wherein, as combined with Figure 8 shown, along the normal direction of the circuit board, the average distance d1 between the first shielding part 1 and the reference plane ( Figure 8 the dotted line marked in) is greater than the average distance d2 between the second shielding part 2 and the reference plane ( Figure 8 the dotted line marked in), and the reference plane is the plane where the surface of the first bonding layer 3 away from the second shielding part 2 is located.

[0041] Since the lower surface of the first shielding part 1 is not a plane, Figure 8 in Figure 8 the average value of the maximum distance and the minimum distance between the lower surface of the first shielding part 1 and the reference plane is used as the average distance d1 between the first shielding part 1 and the reference plane (

[0042] the dotted line marked in).

[0043] It should be noted that the device area A of the shielding structure in this specification does not refer to that there are devices arranged in the shielding structure, but refers to that when the shielding structure is applied to the circuit board, the device area A of the shielding structure covers the components in the circuit board; similarly, the non-device area B of the shielding structure refers to that when the shielding structure is applied to the circuit board, the non-device area B of the shielding structure covers the area in the circuit board except for the components.

[0044] Exemplarily, both the first shielding part 1 and the second shielding part 2 include a first insulating layer, an electromagnetic shielding layer and a second insulating layer which are stacked.

[0045] Exemplarily, the electromagnetic shielding layer may include a metal grid.

[0046] Wherein, the first bonding layer 3 is used to bond the shielding structure to the circuit board.

[0047] Exemplarily, the material of the first bonding layer 3 may be an adhesive material, for example, glue or tape.

[0048] In this specification, the "reference plane" is a virtual concept proposed to illustrate the difference between the first shielding portion 1 and the second shielding portion 2, and it does not exist in reality.

[0049] In some shielding structures provided by the embodiments of the present application, such as Figure 8 as shown, there is a gap between the first shielding portion 1 and the reference plane.

[0050] Here, the three-dimensional structure of the above pores is not limited, and its three-dimensional structure depends on the gap on the lower surface of the first shielding portion 1.

[0051] It should be noted that when the shielding structure is bonded to the circuit board through the first bonding layer 3, since the average distance between the first shielding portion 1 and the reference plane ( Figure 8 the dotted line marked therein) is greater than the average distance between the second shielding portion 2 and the reference plane ( Figure 8 the dotted line marked therein), thus, as Figure 7 shown, when the shielding structure is bonded to the circuit board 6, an appropriate space can be reserved between the first shielding portion 1 and the component 61 on the circuit board 6, which can greatly improve the situation that the component 61 on the circuit board 6 pierces through the electromagnetic shielding film, and further ensure the normal display of the display device.

[0052] In some shielding structures provided by the embodiments of the present application, such as Figure 1 and Figure 2 shown, the cross-section of the first shielding portion 1 in the direction perpendicular to the reference plane is a bent structure.

[0053] Among them, the bent structure has ductility, and under the action of external force support, the bent structure can be stretched out. Thus, when the shielding structure is bonded to the circuit board 6, the component 61 on the circuit board 6 can support the bent structure, so that there can be more space between the first shielding portion 1 and the component 61 on the circuit board 6 to facilitate accommodating the component and avoid the edge of the component 61 from damaging the shielding structure. In this way, the situation that the component 61 on the circuit board 6 pierces through the electromagnetic shielding film can be further improved, and further ensure the normal display of the display device.

[0054] In some shielding structures provided by the embodiments of the present application, in combination with Figure 1 and Figure 3 shown, or in combination with Figure 1 and Figure 4As shown, the space between the first shielding portion 1 and the reference plane includes at least one row of triangular prisms connected together; wherein, the first side surfaces of the triangular prisms are coplanar, and the side walls of the first side surfaces in each triangular prism are connected.

[0055] Figure 1 The cross-sectional view of five triangular prisms connected together is drawn with a dashed triangle in it.

[0056] In the embodiment of the present application, the first shielding portion 1 has ductility. Under the action of external force support, the first shielding portion 1 can be stretched out. Thus, when the shielding structure is bonded to the circuit board 6, the components 61 on the circuit board 6 can support the first shielding portion 1, so that there can be more space between the first shielding portion 1 and the components 61 on the circuit board 6 to facilitate accommodating the components and avoid the edges of the components 61 from damaging the shielding structure. In this way, the situation that the components 61 in the circuit board 6 pierce through the electromagnetic shielding film can be further improved, and thus the normal display of the display device can be ensured.

[0057] In some shielding structures provided in the embodiment of the present application, such as Figure 3 or Figure 4 As shown, the shape of the orthographic projection of the first shielding portion 1 on the reference plane includes at least one row of rectangles arranged side by side. The extending direction of the long side of the rectangle is the first direction (for example, the X direction) or the second direction (for example, the Y direction), and the first direction (for example, the X direction) and the second direction (for example, the Y direction) intersect.

[0058] Among them, Figure 1 it can be Figure 3 the cross-sectional structure schematic diagram along the M1M2 direction; or, Figure 1 it can be Figure 4 the cross-sectional structure schematic diagram along the M5M6 direction.

[0059] Exemplarily, as Figure 3 shown, a row of rectangles is arranged along the first direction (for example, the X direction), and the long side of the rectangle extends along the second direction (for example, the Y direction).

[0060] Exemplarily, as Figure 4 shown, a row of rectangles is arranged along the second direction (for example, the Y direction), and the long side of the rectangle extends along the first direction (for example, the X direction).

[0061] Exemplarily, the first direction and the second direction are perpendicular.

[0062] In some shielding structures provided in the embodiment of the present application, the space between the first shielding portion 1 and the reference plane includes at least one row of quadrangular pyramids connected together; wherein, the bottom surfaces of the quadrangular pyramids are coplanar, and the sides of the bottom surfaces of the quadrangular pyramids are connected.

[0063] Exemplarily,Figure 6 A top - view structural schematic diagram of the shielding structure is provided when the space between the first shielding portion 1 and the reference plane includes at least one row of connected quadrangular pyramids; among them, the top - view structural schematic diagram of a quadrangular pyramid is marked in the dashed - line ellipse.

[0064] Exemplarily, the above - mentioned quadrangular pyramid can be a regular quadrangular pyramid.

[0065] In an embodiment of the present application, the first shielding portion 1 has ductility. Under the action of external force support, the first shielding portion 1 can be stretched out. Thus, when the shielding structure is bonded to the circuit board 6, the components 61 on the circuit board 6 can support the first shielding portion 1, so that there can be more space between the first shielding portion 1 and the components 61 on the circuit board 6, facilitating the accommodation of components and avoiding the edge of the components 61 from damaging the shielding structure. In this way, the situation where the components 61 in the circuit board 6 pierce through the electromagnetic shielding film can be further improved, and thus the normal display of the display device can be ensured.

[0066] In some shielding structures provided by the embodiments of the present application, as Figure 1 shown, the first shielding portion 1 and the second shielding portion 2 are an integrated structure.

[0067] The integrated structure means that the first shielding portion 1 and the second shielding portion 2 can use the same raw material and be prepared simultaneously by the same technological steps. There is no connecting member between them, but they are directly connected as a whole.

[0068] In some shielding structures provided by the embodiments of the present application, as Figure 2 shown, along the normal direction of the circuit board, the minimum distance h1 between the first shielding portion 1 and the reference plane is greater than or equal to the minimum distance h2 between the surface of the second shielding portion 2 away from the first bonding layer 3 and the reference plane.

[0069] In an embodiment of the present application, by setting that along the normal direction of the circuit board, the minimum distance h1 between the first shielding portion 1 and the reference plane is greater than or equal to the minimum distance h2 between the surface of the second shielding portion 2 away from the first bonding layer 3 and the reference plane; in this way, under the action of external force support, the first shielding portion 1 can be stretched out. Thus, when the shielding structure is bonded to the circuit board 6, the components 61 on the circuit board 6 can support the first shielding portion 1, so that there can be more space between the first shielding portion 1 and the components 61 on the circuit board 6, facilitating the accommodation of components and avoiding the edge of the components 61 from damaging the shielding structure. In this way, the situation where the components 61 in the circuit board 6 pierce through the electromagnetic shielding film can be further improved, and thus the normal display of the display device can be ensured.

[0070] In some shielding structures provided by the embodiments of the present application, as Figure 2As shown, the shielding structure further includes a second adhesive layer 7. The second adhesive layer 7 is disposed in a partial area on the surface of the second shielding portion 2 away from the first adhesive layer 3. The first shielding portion 1 and the second shielding portion 2 are fixed together through the second adhesive layer 7.

[0071] Figure 5 There is provided a top view structural schematic diagram of a shielding structure as Figure 2 shown.

[0072] In the embodiments of the present application, the above-mentioned first shielding portion 1 can be prepared with textures or wrinkles of different structures by an embossing process. Since the first adhesive layer 3 is not provided in the area between the first shielding portion 1 and the circuit board, the flexibility and stretching ability of this area can be ensured. When subjected to an external force, the elasticity and ductility of the first shielding portion 1 can also offset part of the external force, reducing the risk of the shielding structure being punctured by the edges of the components in the circuit board.

[0073] This specification only introduces the structures related to the inventive points of the shielding structure. The shielding structure may further include other structures. For details, reference can be made to the introduction in the related art and will not be elaborated here.

[0074] Embodiments of the present application provide a display device, which includes a circuit board, a display panel, and a shielding structure as described in any one of the foregoing;

[0075] The circuit board and the display panel are electrically connected, and the circuit board is disposed on the back of the display panel. The shielding structure is located on the side of the circuit board away from the display panel.

[0076] Embodiments of the present application provide a shielding structure and a display device, which are applied to a circuit board. The shielding structure is provided with at least one device area A. The device area A includes a first shielding portion 1. The device area A overlaps with the orthographic projection of at least one component on the circuit board. In addition, as Figure 8 shown, the average distance d1 from the first shielding portion 1 to the reference plane in the normal direction of the circuit board is set to be greater than the average distance d2 from the second shielding portion 2 to the reference plane; thus, when the shielding structure is applied to the circuit board, since the average distance d1 from the first shielding portion 1 to the reference plane is greater than the average distance d2 from the second shielding portion 2 to the reference plane, extra space is reserved for the components of the circuit board, which can greatly improve the situation where the components in the circuit board puncture the electromagnetic shielding film, thereby ensuring the normal display of the display device.

[0077] The above is only the specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present application, and all should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A shielding structure, characterized in that: Applied to a circuit board, the shielding structure comprises at least one device area and a non-device area surrounding the device area; a plurality of components are arranged in the circuit board, and the device area overlaps with the orthographic projection of at least one of the components on the circuit board; The device area includes a first shielding portion; The non-device area includes a first adhesive layer and a second shielding portion located on one side of the first adhesive layer; the first adhesive layer is located between the second shielding portion and the circuit board; the first shielding portion and the second shielding portion are fixed together; Among them, along the normal direction of the circuit board, the average distance between the first shielding part and the reference plane is greater than the average distance between the second shielding part and the reference plane, and the reference plane is a plane where the surface of the first adhesive layer away from the second shielding part is located.

2. The shielding structure according to claim 1, characterized in that: There is a gap between the first shielding portion and the reference surface.

3. The shielding structure according to claim 2, characterized in that: The cross section of the first shielding portion along a direction perpendicular to the reference plane is a bent structure.

4. The shielding structure according to claim 3, characterized in that: The space between the first shielding portion and the reference plane includes at least one row of triangular prisms connected together; wherein the first side surfaces of the triangular prisms are coplanar, and the side walls of the first side surfaces of the triangular prisms are connected.

5. The shielding structure according to claim 3, characterized in that: The space between the first shielding portion and the reference plane includes at least one row of connected quadrangular pyramids; wherein the bottom surfaces of the quadrangular pyramids are coplanar, and the sides of the bottom surfaces of the quadrangular pyramids are connected.

6. The shielding structure according to claim 4, characterized in that: The shape of the orthographic projection of the first shielding portion on the reference plane includes at least one row of rectangles arranged side by side, the long sides of the rectangles extend in the first direction or the second direction, and the first direction and the second direction intersect.

7. The shielding structure according to any one of claims 1 to 6, characterized in that: The first shielding portion and the second shielding portion are an integrated structure.

8. The shielding structure according to any one of claims 1 to 6, characterized in that: Along the normal direction of the circuit board, the minimum distance between the first shielding portion and the reference surface is greater than or equal to the minimum distance between a surface of the second shielding portion away from the first adhesive layer and the reference surface.

9. The shielding structure according to claim 8, characterized in that: The shielding structure further includes a second adhesive layer, which is disposed on a partial area of ​​a surface of the second shielding portion away from the first adhesive layer, and the first shielding portion and the second shielding portion are fixed together by the second adhesive layer.

10. A display device, characterized in that: comprising a circuit board, a display panel and a shielding structure as claimed in any one of claims 1 to 9; The circuit board is electrically connected to the display panel, and the circuit board is arranged on the back side of the display panel. The shielding structure is located on a side of the circuit board away from the display panel.

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