Display module

Abstract

The utility model discloses a display module which comprises a display screen and a backlight, an FPC is bound on the display screen, one end, far away from the display screen, of the FPC is bent to the back face of the backlight, an element area is arranged on the FPC, and a composite film used for electromagnetic shielding and heat conduction is arranged on the element area. According to the display module, the composite film is arranged to cover the element area so as to achieve the effects of electromagnetic shielding and heat conduction of the element area.

Description

Technical Field

[0001] The utility model relates to the technical field of display modules, and in particular to a display module. Background Art

[0002] A display module generally includes a display screen and a backlight. An FPC is usually bonded to the display screen, and the FPC is used to connect to a customer main board to ensure the normal use of the display module. For the display module to operate in compliance with requirements in the electromagnetic environment of the whole machine and not generate electromagnetic interference to other devices or components in the whole machine, shielding measures are usually taken for the display module. Generally, electromagnetic shielding is mainly achieved by using a metal cover or an electromagnetic shielding film. When the number of components integrated on the FPC increases and the power consumption increases, the problem of heat dissipation also needs to be solved simultaneously. However, the existing electromagnetic shielding film can only solve the problem of electromagnetic shielding and cannot solve the problem of heat dissipation. Therefore, heat dissipation cannot be carried out in a timely manner when the number of components on the FPC increases. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a display module.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] A display module includes: a display screen and a backlight. An FPC is bonded to the display screen. One end of the FPC away from the display screen is bent to the back of the backlight. An element area is provided on the FPC, and a composite film for electromagnetic shielding and heat conduction is provided on the element area.

[0006] In one embodiment, the composite film includes a first nano-ceramic layer, a substrate layer, a second nano-ceramic layer, and a thermal conductive adhesive layer arranged in sequence from top to bottom. The thermal conductive adhesive layer is in contact with the upper surface of the element area.

[0007] In one embodiment, both the first nano-ceramic layer and the second nano-ceramic layer are made of nano-ceramic black high-conductivity resin, and the thickness of both the first nano-ceramic layer and the second nano-ceramic layer is 20μm - 60μm.

[0008] In one embodiment, the substrate layer is copper foil or aluminum foil, and the thickness of the substrate layer is 20μm - 100μm.

[0009] In one embodiment, the thermal conductive adhesive layer is made of a thermal conductive acrylic material, and the thickness of the thermal conductive adhesive layer is 2μm - 200μm.

[0010] In one embodiment, a graphene layer is provided below the second nano-ceramic layer. The graphene layer is made of graphene material, and the thickness of the graphene layer is 60μm - 70μm.

[0011] In one embodiment, the size of the composite film is larger than that of the component area, and the composite film covers the periphery of the component area beyond the range of the component area.

[0012] In one embodiment, the end of the FPC away from the end bound to the display screen is the interface pin end, the interface pin end is located on one side of the component area, and one end of the interface pin end extends out of the backlight.

[0013] In one embodiment, the composite film is composed of a middle covering area and an enclosing area arranged on the periphery of the covering area. The covering area covers the upper surface of the component area, and the enclosing area covers the peripheral area of the component area.

[0014] In one embodiment, the enclosing area makes an avoidance with respect to the outer shape of the interface pin end.

[0015] Compared with the prior art, the present utility model has at least the following advantages:

[0016] In a display module of the present utility model, by arranging a composite film to cover the component area, the functions of electromagnetic shielding and heat conduction of the heat generated in the component area are achieved. The heat generated by the components in the component area is quickly conducted to the second nano-ceramic layer and the base material layer through the thermal conductive adhesive layer, and then radiated to the outside through the surface of the first nano-ceramic layer to dissipate the heat in the component area, avoiding overheating of the component area. The base material layer is copper foil or aluminum foil, and using a metal material as the base material layer enables the composite film to have a shielding function, so that the composite film can solve the problems of heat dissipation and electromagnetic shielding simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below.

[0018] Figure 1 It is a schematic diagram of the back structure of a display module provided by the present utility model;

[0019] Figure 2 It is a schematic diagram of the structure of a display module provided by the present utility model after covering with a composite film;

[0020] Figure 3 It is a schematic diagram of the stacked structure of the composite film in a display module provided by the present utility model.

[0021] Description of the Drawings: 10, display screen; 20, backlight; 30, FPC; 301, interface pin end; 31, component area; 40, composite film; 401, covering area; 402, surrounding area; 41, first nano-ceramic layer; 42, substrate layer; 43, second nano-ceramic layer; 44, thermal conductive adhesive layer; 50, graphene layer. Detailed Description of the Invention

[0022] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings.

[0023] A display module, referring to Figure 1 , includes a display screen 10 and a backlight 20. An FPC 30 is bonded to the display screen 10. One end of the FPC 30 away from the display screen 10 is bent to the back of the backlight 20 and attached to the back of the backlight 20.

[0024] Referring to Figure 1 and Figure 2 , an element area 31 is provided on the FPC 30, and a plurality of components are integrated on the element area 31. The element area 31 is located on the back of the backlight 20. A composite film 40 for electromagnetic shielding and heat conduction is provided on the element area 31. The composite film 40 covers the element area 31 to perform electromagnetic shielding on the element area 31 and dissipate heat in a timely manner when the components in the element area 31 are working.

[0025] Referring to Figure 3 , the composite film 40 includes a first nano-ceramic layer 41, a substrate layer 42, a second nano-ceramic layer 43, and a thermal conductive adhesive layer 44 arranged in sequence from top to bottom. Among them, both the first nano-ceramic layer 41 and the second nano-ceramic layer 43 are made of nano-ceramic black high thermal conductive resin. The first nano-ceramic layer 41 and the second nano-ceramic layer 43 have good heat radiation properties. The first nano-ceramic layer 41 is located at the topmost layer of the composite film 40 and can dissipate the heat of the element area 31 to the air through heat radiation.

[0026] Further, referring to Figure 3 , the thickness of both the first nano-ceramic layer 41 and the second nano-ceramic layer 43 is 20μm - 60μm.

[0027] Referring to Figure 3 , the substrate layer 42 is copper foil or aluminum foil. Using a metal material as the substrate layer 42 enables the composite film 40 to have a shielding function. The second nano-ceramic layer 43 is located below the substrate layer 42 and serves to isolate the connection between the element area 31 and the substrate layer 42 made of a metal material, thereby preventing a short circuit in the element area 31.

[0028] Further, referring to Figure 3 , the thickness of the substrate layer 42 is 20μm - 100μm.

[0029] Reference Figure 3 The thermal conductive adhesive layer 44 is made of a thermal conductive acrylic material, and is coated on the substrate layer 42. The thermal conductive adhesive layer 44 contacts the upper surface of the component area 31 to quickly conduct the heat of the component area 31. The heat generated by the components in the component area 31 is quickly conducted to the second nano-ceramic layer 43 and the substrate layer 42 through the thermal conductive adhesive layer 44, and then radiated to the outside through the surface of the first nano-ceramic layer 41 to dissipate the heat in the component area 31 to prevent the component area 31 from overheating.

[0030] Further, refer to Figure 3 The thickness of the thermal conductive adhesive layer 44 is 2 μm-200 μm.

[0031] Reference Figure 3 A graphene layer 50 is disposed below the second nano-ceramic layer 43. The graphene layer 50 is made of graphene material. Graphene has good thermal conductivity, so that the heat transferred from the thermal conductive adhesive layer 44 to the graphene layer 50 can be conducted out through the second nano-ceramic layer 43, thereby avoiding heat accumulation between the second nano-ceramic layer 43 and the substrate layer 42.

[0032] Further, refer to Figure 3 , the thickness of the graphene layer 50 is 60 μm-70 μm.

[0033] Further, refer to Figure 1 and Figure 2 The size of the composite film 40 is larger than that of the device region 31 , and the composite film 40 exceeds the range of the device region 31 and covers the periphery of the device region 31 to dissipate heat to the device region 31 and the area around the device region 31 .

[0034] Reference Figure 1 and Figure 2 The end of the FPC 30 away from the display screen 10 is an interface pin end 301, which is used to connect to the customer's mainboard. The interface pin end 301 is located on one side of the component area 31, and one end of the interface pin end 301 extends out of the backlight 20.

[0035] Further, refer to Figure 2 The composite film 40 is composed of a covering area 401 in the middle and an enclosing area 402 arranged outside the covering area 401. The covering area 401 covers the upper surface of the component area 31, and the enclosing area 402 covers the peripheral area of ​​the component area 31. The enclosing area 402 is avoided relative to the shape of the interface pin end 301 to prevent the enclosing area 402 from covering the interface pin end 301 and affecting the connection between the interface pin end 301 and the customer's motherboard.

[0036] The display module is provided with a composite film 40 covering the component area 31 to play a role in electromagnetic shielding and exporting the heat of the component area 31. The heat generated by the components in the component area 31 is quickly conducted to the second nano-ceramic layer 43 and the substrate layer 42 through the thermal conductive adhesive layer 44, and then radiated to the outside through the surface of the first nano-ceramic layer 41 to dissipate the heat in the component area 31 and prevent the component area 31 from overheating. The substrate layer 42 is made of copper foil or aluminum foil. Using a metal material as the substrate layer 42 enables the composite film 40 to have a shielding function, so that the composite film 40 can solve the problems of heat dissipation and electromagnetic shielding at the same time.

[0037] The above embodiments only represent several implementation manners of the present invention, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A display module, characterized in that: include: A display screen (10) and a backlight (20), wherein an FPC (30) is bound to the display screen (10), an end of the FPC (30) away from the display screen (10) is bent to the back side of the backlight (20), a component area (31) is arranged on the FPC (30), and a composite film (40) for electromagnetic shielding and heat conduction is arranged on the component area (31).

2. A display module according to claim 1, characterized in that: The composite film (40) comprises a first nano-ceramic layer (41), a substrate layer (42), a second nano-ceramic layer (43) and a thermally conductive adhesive layer (44) which are arranged in sequence from top to bottom, and the thermally conductive adhesive layer (44) is in contact with the upper surface of the element region (31).

3. A display module according to claim 2, characterized in that: The first nano-ceramic layer (41) and the second nano-ceramic layer (43) are both made of nano-ceramic black high-conductivity resin, and the thickness of the first nano-ceramic layer (41) and the second nano-ceramic layer (43) are both 20 μm-60 μm.

4. A display module according to claim 3, characterized in that: The substrate layer (42) is copper foil or aluminum foil, and the thickness of the substrate layer (42) is 20 μm-100 μm.

5. A display module according to claim 4, characterized in that: The thermally conductive adhesive layer (44) is made of a thermally conductive acrylic material, and the thickness of the thermally conductive adhesive layer (44) is 2 μm-200 μm.

6. The display module according to claim 5, characterized in that: A graphene layer (50) is arranged below the second nano-ceramic layer (43); the graphene layer (50) is made of graphene material; and the thickness of the graphene layer (50) is 60 μm-70 μm.

7. The display module according to claim 6, characterized in that: The size of the composite film (40) is larger than the size of the device area (31), and the composite film (40) exceeds the range of the device area (31) and covers the periphery of the device area (31).

8. The display module according to claim 7, characterized in that: The end of the FPC (30) away from being bound to the display screen (10) is an interface pin end (301), the interface pin end (301) is located at one side of the component area (31), and one end of the interface pin end (301) extends out of the backlight (20).

9. The display module according to claim 8, characterized in that: The composite film (40) is composed of a central covering area (401) and a surrounding area (402) arranged on the periphery of the covering area (401), wherein the covering area (401) covers the upper surface of the component area (31), and the surrounding area (402) covers the peripheral area of ​​the component area (31).

10. The display module according to claim 9, characterized in that: The enclosing area (402) is avoided relative to the outer shape of the interface pin end (301).

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