Display module with magnetic shielding film

Abstract

The utility model discloses a display module with a magnetic shielding film, which comprises a screen assembly, a backlight assembly and a flexible circuit board, the screen assembly is stacked on the light emitting surface of the backlight assembly, and the backlight assembly comprises a backlight iron stand; the flexible circuit board comprises a first connecting end, a second connecting end and a wiring area connected between the first connecting end and the second connecting end, and the first connecting end is connected with the screen assembly and the backlight assembly. The second connecting end is provided with a connector and is adhered and fixed on the back surface of the backlight iron stand through a first adhesive layer; a magnetic shielding film is arranged on the surface of the side, opposite to the backlight assembly, of the wiring area of the flexible circuit board, and the wiring area is fixed to the back face of the backlight iron frame through the magnetic shielding film in a magnetic attraction mode. According to the display module, the position of the wiring area of the flexible circuit board can be prevented from deviating, and meanwhile signal interference caused by external electromagnetic signals to wiring of the circuit board in the wiring area is avoided.

Description

Technical Field

[0001] The utility model relates to display technology, in particular to a display module. Background Art

[0002] The flexible circuit board (FPC) of mobile phone display modules is generally connected to the mobile phone motherboard using a connector. Before this type of display module is shipped to the customer terminal, the flexible circuit board needs to be folded onto the back of the backlight assembly. One end of the connector is fixed to the backlight assembly with conductive glue, and its routing area is suspended. Due to its large length, the routing area of ​​the flexible circuit board is prone to position deviation after being fixed at the connector end. Once the routing area of ​​the flexible circuit board is deviated, it is easy to be crushed and broken by the blister box during packaging, which may lead to the risk of the circuit board routing in the routing area being broken. Utility Model Content

[0003] In order to solve the above-mentioned deficiencies of the prior art, the utility model provides a display module, which can prevent the routing area of ​​the flexible circuit board from deviating, and at the same time avoid external electromagnetic signals from causing signal interference to the routing of the circuit board in the routing area.

[0004] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0005] A display module with a magnetic shielding film comprises a screen assembly, a backlight assembly and a flexible circuit board, wherein the screen assembly is stacked on the light-emitting surface of the backlight assembly, and the backlight assembly comprises a backlight iron frame; the flexible circuit board comprises a first connection end, a second connection end and a routing area connected between the first connection end and the second connection end, the first connection end is connected to the screen assembly and the backlight assembly, the second connection end is provided with a connector and is fixed to the back side of the backlight iron frame by a first adhesive layer; the routing area of ​​the flexible circuit board is provided with a magnetic shielding film on a surface on a side facing away from the backlight assembly, and the routing area is magnetically fixed to the back side of the backlight iron frame by the magnetic shielding film.

[0006] Furthermore, the magnetic shielding film includes a second adhesive layer, an electromagnetic shielding layer arranged on the second adhesive layer, and a magnetic material layer arranged on the electromagnetic shielding layer, and the magnetic shielding film is adhered and fixed to the routing area through the second adhesive layer.

[0007] Furthermore, the electromagnetic shielding layer is a conductive film layer, the second adhesive layer is a conductive adhesive layer, and the magnetic material layer is a magnetic insulating layer.

[0008] Furthermore, the magnetic shielding film also includes a protective film layer, and the protective film layer is arranged on the magnetic material layer.

[0009] Furthermore, the electromagnetic shielding layer is a conductive film layer, the second adhesive layer is a conductive adhesive layer, and an insulating material layer is provided between the electromagnetic shielding layer and the magnetic material layer.

[0010] Furthermore, the electromagnetic shielding layer is a conductive film layer, the second adhesive layer is a conductive adhesive layer, and an insulating material layer is provided on a surface of the magnetic material layer on a side facing away from the electromagnetic shielding layer.

[0011] Furthermore, the magnetic material layer is a magnetic ink layer.

[0012] Furthermore, the electromagnetic shielding layer is a metal film layer.

[0013] Furthermore, the display module also includes a reinforcing sheet, which is adhered and fixed to a surface of the second connecting end facing away from the connector through a third adhesive layer, and is adhered and fixed to the back side of the backlight iron frame through the first adhesive layer.

[0014] Furthermore, the reinforcing sheet is a metal sheet, and the first adhesive layer and the third adhesive layer are conductive adhesive layers.

[0015] The utility model has the following beneficial effects: the display module of the utility model adds the magnetic shielding film on the routing area of ​​the flexible circuit board, and the magnetic shielding film is located on the side surface of the routing area facing away from the backlight assembly. The magnetic attraction of the magnetic shielding film can pass through the routing area and act on the backlight iron frame of the backlight assembly, thereby magnetically fixing the routing area of ​​the flexible circuit board on the back side of the backlight iron frame to avoid position deviation of the routing area. At the same time, the magnetic shielding film also has a shielding effect, which can shield external electromagnetic signals, thereby preventing external electromagnetic signals from causing signal interference to the circuit board routing in the routing area, thereby improving signal stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the cross-sectional structure of the display module provided by the utility model.

[0017] Figure 2 This is a schematic diagram of the back structure of the display module provided by the utility model.

[0018] Figure 3 This is a schematic diagram of the stacking structure of the magnetic shielding film in the display module provided by the utility model.

[0019] Figure 4 This is a schematic diagram of the stacking structure of another magnetic shielding film in the display module provided by the utility model.

[0020] Figure 5This is a schematic diagram of the stacking structure of another magnetic shielding film in the display module provided by the utility model.

[0021] Figure 6 This is a schematic diagram of the stacking structure of another magnetic shielding film in the display module provided by the utility model.

[0022] Figure 7 This is a schematic diagram of the stacking structure of reinforcement sheets in another display module provided by the utility model. Implementation

[0023] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0024] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 a limitation on the present invention.

[0025] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Embodiment 1

[0027] like Figure 1 and 2As shown, a display module with a magnetic shielding film 400 includes a screen assembly 100, a backlight assembly 200 and a flexible circuit board 300, wherein the screen assembly 100 is stacked on the light emitting surface of the backlight assembly 200.

[0028] The screen assembly 100 includes a lower substrate 102 and an upper substrate 101 that are arranged opposite to each other, a sealant 103 and a liquid crystal material 104 are arranged between the lower substrate 102 and the upper substrate 101, the sealant 103 is located in the peripheral area of ​​the screen assembly 100 and encloses the display area of ​​the screen assembly 100, and the liquid crystal material 104 is sealed in a sealed space enclosed by the upper substrate 101, the lower substrate 102 and the sealant 103; wherein, an RGB color filter layer 105 is arranged on a surface of the upper substrate 101 facing the lower substrate 102, an upper polarizer 106 is arranged on a surface of the upper substrate 101 facing away from the lower substrate 102, a TFT array layer 107 is arranged on a surface of the lower substrate 102 facing the upper substrate 101, and a lower polarizer 108 is arranged on a surface of the lower substrate 102 facing away from the upper substrate 101; at least one side edge of the lower substrate 102 extends outward from the upper substrate 101 to form a binding area.

[0029] The backlight assembly 200 includes a backlight iron frame 201 and a light bar 202, a light guide plate 203, an optical film 204 and a reflective film 205 arranged in the backlight iron frame 201, the light bar 202 is arranged on the metal iron frame and corresponds to the light incident surface of the light guide plate 203, the optical film 204 is arranged on the light emitting surface of the light guide plate 203, and the reflective film 205 is arranged on the back side of the light guide plate 203 opposite to its light emitting surface; the optical film 204 includes but is not limited to a diffusion film, a first brightening film and a second brightening film which are sequentially stacked on the light emitting surface of the light guide plate 203.

[0030] Of course, the screen assembly 100 and the backlight assembly 200 of the present invention are not limited to the above structure. The screen assembly 100 and the backlight assembly 200 can adopt any existing structure, and the present invention does not involve improving the structure of the screen assembly 100 and the backlight assembly 200.

[0031] The flexible circuit board 300 includes a first connection end 301, a second connection end 302 and a routing area 303 connected between the first connection end 301 and the second connection end 302, the first connection end 301 is connected to the screen assembly 100 and the backlight assembly 200, the second connection end 302 is provided with a connector and is glued and fixed to the back side of the backlight iron frame 201 through a first adhesive layer 600; the routing area 303 of the flexible circuit board 300 is provided with a magnetic shielding film 400 on the surface of the side facing away from the backlight assembly 200, and the routing area 303 is magnetically fixed to the back side of the backlight iron frame 201 through the magnetic shielding film 400.

[0032] The display module of the utility model adds the magnetic shielding film 400 on the routing area 303 of the flexible circuit board 300. The magnetic shielding film 400 is located on the side surface of the routing area 303 facing away from the backlight assembly 200. The magnetic attraction of the magnetic shielding film 400 can pass through the routing area 303 and act on the backlight iron frame 201 of the backlight assembly 200, thereby magnetically fixing the routing area 303 of the flexible circuit board 300 on the back side of the backlight iron frame 201 to prevent the routing area 303 from deviation. At the same time, the magnetic shielding film 400 also has a shielding effect, which can shield external electromagnetic signals, thereby preventing external electromagnetic signals from causing signal interference to the circuit board routing in the routing area 303, thereby improving signal stability.

[0033] like Figure 3-6 As shown, the magnetic shielding film 400 includes a second adhesive layer 401 , an electromagnetic shielding layer 402 disposed on the second adhesive layer 401 , and a magnetic material layer 403 disposed on the electromagnetic shielding layer 402 . The magnetic shielding film 400 is adhered and fixed to the routing area 303 through the second adhesive layer 401 .

[0034] Preferably, the electromagnetic shielding layer 402 is a conductive film layer, and the second adhesive layer 401 is a conductive adhesive layer, so that the electromagnetic shielding layer 402 can collect the static electricity generated by the magnetic shielding film 400 during assembly, transit, transportation and use, and transfer the collected static electricity to the flexible circuit board 300 through the second adhesive layer 401, so as to ground the static electricity generated by the electromagnetic shielding layer 402 through the flexible circuit board 300.

[0035] The electromagnetic shielding layer 402 is based on the property of conductive materials that they can absorb and reflect electromagnetic signals, and can be, but is not limited to, a metal film layer, preferably copper foil or silver film.

[0036] In a first embodiment, if Figure 3As shown, the magnetic material layer 403 is a magnetic insulating layer. Specifically, the magnetic insulating layer is formed by mixing magnetic particles according to a certain mass percentage into an insulating material such as epoxy resin and stirring the mixture evenly.

[0037] The magnetic material layer 403 of this specific embodiment has an insulating effect. When the electromagnetic shielding layer 402 is a conductive film layer and the second adhesive layer 401 is a conductive adhesive layer, the static charge collected by the electromagnetic shielding layer 402 can be prevented from being transferred to the magnetic material layer 403, thereby preventing the static charge from affecting the magnetism of the magnetic material layer 403.

[0038] In a second embodiment, if Figure 4 As shown, the magnetic material layer 403 is not limited to magnetic insulating materials, but may also be magnetic conductive materials, or other conventional magnetic materials. In this case, an insulating material layer 404 such as epoxy resin is provided between the electromagnetic shielding layer 402 and the magnetic material layer 403 .

[0039] The insulating material layer 404 of this specific embodiment has an insulating effect. When the electromagnetic shielding layer 402 is a conductive film layer and the second adhesive layer 401 is a conductive adhesive layer, it can prevent the static charge collected by the electromagnetic shielding layer 402 from being transferred to the magnetic material layer 403, thereby preventing the static charge from affecting the magnetism of the magnetic material layer 403.

[0040] In the above two embodiments, in order to prevent the magnetic particles in the magnetic material layer 403 from being scratched by foreign objects, the magnetic shielding film 400 further includes a protective film layer 405, which is disposed on the magnetic material layer 403. The main function of the protective film layer 405 is to protect the surface of the magnetic material layer 403 to prevent the magnetic particles in the magnetic material layer 403 from being scratched by foreign objects.

[0041] The protective film layer 405 may be, but is not limited to, a polymer film such as a PET film layer, a PI film layer or a PVC film layer.

[0042] In a third embodiment, if Figure 5 As shown, the magnetic material layer 403 is not limited to magnetic insulating materials, but may also be magnetic conductive materials, or other conventional magnetic materials, and an insulating material layer 404 such as epoxy resin is provided on the surface of the magnetic material layer 403 on the side facing away from the electromagnetic shielding layer 402 .

[0043] The insulating material layer 404 of this specific embodiment has an insulating effect. When the magnetic material layer 403 is assembled with a terminal device such as a mobile phone, the insulating material layer 404 can prevent the magnetic material layer 403 from contacting and short-circuiting with other electrical components in the terminal device, thereby preventing the magnetism of the magnetic material layer 403 from being affected by the short-circuit of other electrical components in the terminal device. At the same time, the insulating material layer 404 is also equivalent to a protective layer, which can prevent the magnetic particles in the magnetic material layer 403 from being scratched by foreign objects.

[0044] In a fourth embodiment, if Figure 6 As shown, the magnetic material layer 403 is not limited to magnetic insulating materials, but can also be magnetic conductive materials, or other conventional magnetic materials, and an insulating material layer 404 such as epoxy resin is provided between the electromagnetic shielding layer 402 and the magnetic material layer 403, and on the surface of the magnetic material layer 403 facing away from the electromagnetic shielding layer 402.

[0045] In this specific implementation, the insulating material layer 404 is disposed on both side surfaces of the magnetic material layer 403 , and can have the beneficial effects of both the second implementation and the third implementation.

[0046] In the second, third and fourth embodiments, the magnetic material layer 403 may be, but is not limited to, a magnetic ink layer. Embodiment 2

[0047] As an optimization solution of the first embodiment, in this embodiment, if Figure 7 As shown, the display module also includes a reinforcing sheet 500, which is glued and fixed to the surface of the second connecting end 302 facing away from the connector through a third adhesive layer 700, and is glued and fixed to the back side of the backlight iron frame 201 through the first adhesive layer 600.

[0048] The display module of the present invention partially increases the hardness of the flexible circuit board 300 on the second connection end 302 by disposing the reinforcing sheet 500 on the other side surface of the second connection end 302 to avoid the second connection end 302 from being damaged when the connector is mounted.

[0049] Preferably, the reinforcing sheet 500 is a metal sheet, and the first adhesive layer 600 and the third adhesive layer 700 are conductive adhesive layers, so that the static charge accumulated on the flexible circuit board 300 can be transferred to the backlight iron frame 201 through the third adhesive layer 700, the reinforcing sheet 500 and the first adhesive layer 600 in sequence. When assembling terminal devices such as mobile phones, the backlight iron frame 201 of the backlight assembly 200 is electrically connected to the metal casing of the terminal device, so that the static charge accumulated on the flexible circuit board 300 can be released by grounding the metal casing of the terminal device.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the utility model rather than to limit them. Although the embodiments of the utility model are described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the embodiments of the utility model can still be modified or replaced by equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A display module with a magnetic shielding film, comprising a screen assembly, a backlight assembly and a flexible circuit board, wherein the screen assembly is stacked on the light-emitting surface of the backlight assembly, and the backlight assembly comprises a backlight iron frame; the flexible circuit board comprises a first connection end, a second connection end and a wiring area connected between the first connection end and the second connection end, the first connection end is connected to the screen assembly and the backlight assembly, and the second connection end is provided with a connector and is fixed to the back of the backlight iron frame by a first adhesive layer; characterized in that A magnetic shielding film is provided on the surface of the wiring area of ​​the flexible circuit board on the side facing away from the backlight assembly, and the wiring area is magnetically fixed to the back side of the backlight iron frame through the magnetic shielding film.

2. The display module according to claim 1, characterized in that: The magnetic shielding film includes a second adhesive layer, an electromagnetic shielding layer arranged on the second adhesive layer, and a magnetic material layer arranged on the electromagnetic shielding layer. The magnetic shielding film is adhered and fixed to the routing area through the second adhesive layer.

3. The display module according to claim 2, characterized in that: The electromagnetic shielding layer is a conductive film layer, the second adhesive layer is a conductive adhesive layer, and the magnetic material layer is a magnetic insulating layer.

4. The display module according to claim 3, characterized in that: The magnetic shielding film further includes a protective film layer, and the protective film layer is disposed on the magnetic material layer.

5. The display module according to claim 2, characterized in that: The electromagnetic shielding layer is a conductive film layer, the second adhesive layer is a conductive adhesive layer, and an insulating material layer is arranged between the electromagnetic shielding layer and the magnetic material layer.

6. The display module according to claim 2, characterized in that: The electromagnetic shielding layer is a conductive film layer, the second adhesive layer is a conductive adhesive layer, and the magnetic material layer is provided with an insulating material layer on a surface on a side facing away from the electromagnetic shielding layer.

7. The display module according to any one of claims 3 to 6, characterized in that: The magnetic material layer is a magnetic ink layer.

8. The display module according to any one of claims 2 to 6, characterized in that: The electromagnetic shielding layer is a metal film layer.

9. The display module according to claim 1, characterized in that: The display module also includes a reinforcing sheet, which is adhered and fixed to a surface of the second connecting end facing away from the connector through a third adhesive layer, and is adhered and fixed to the back of the backlight iron frame through the first adhesive layer.

10. The display module according to claim 9, characterized in that: The reinforcing sheet is a metal sheet, and the first adhesive layer and the third adhesive layer are conductive adhesive layers.

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