Scratch-resistant double-layer heat dissipation graphite sheet and display module

Abstract

The application belongs to the field of display modules, and relates to a scratch-resistant double-layer heat dissipation graphite sheet, which comprises a graphite sheet body, the graphite sheet body is attached to an iron stand of a backlight module and is used for heat dissipation, a graphite sheet body avoiding position is arranged on the graphite sheet body and is used for FPC conductive double-sided attachment, the graphite sheet body comprises a first adhesive layer, a first graphite layer, a second adhesive layer, a second graphite layer, an insulating PET layer, a photo oil layer and a graphite sheet protective film which are stacked from bottom to top, the first adhesive layer is attached to the iron stand of the backlight module, and the graphite sheet protective film is torn off before the module is shipped. The double-layer graphite sheet has better heat dissipation performance than the traditional single-layer graphite sheet, can realize rapid cooling, and can improve the scratch resistance of the surface of the graphite sheet.

Description

Technical Field

[0001] This application relates to the field of display module technology, and more specifically, to a scratch-resistant double-layer heat dissipation graphite sheet and a display module. Background Technology

[0002] To improve heat dissipation, display modules typically have a heat-dissipating graphite sheet (such as...) attached to the metal frame of the backlight module. Figure 1 The adhesive surface between the graphite sheet and the backlight frame is covered with adhesive. The surface of the graphite sheet is easily subjected to friction and scratches from external objects, which can easily cause scratches, damage, or chipping. This affects the heat dissipation function of the graphite sheet, resulting in poor appearance, which affects product yield and brand value, leading to customer complaints or even returns and rework, and increasing costs.

[0003] In view of this, this case provides a scratch-resistant double-layer heat dissipation graphite sheet and a display module to improve product performance, reduce customer complaints, and increase production yield. Utility Model Content

[0004] The technical problem to be solved by this utility model is that the surface of graphite sheets is easily scratched, damaged or broken, which affects the heat dissipation function of the graphite sheets and results in poor appearance.

[0005] To solve the above-mentioned technical problems, this utility model provides a scratch-resistant double-layer heat dissipation graphite sheet, which adopts the following technical solution:

[0006] It includes a graphite sheet body, which is attached to the iron frame of the backlight module for heat dissipation; the graphite sheet body has a graphite sheet body clearance space for FPC conductive double-sided bonding.

[0007] The graphite sheet body comprises, from bottom to top, a first adhesive layer, a first graphite layer, a second adhesive layer, a second graphite layer, an insulating PET layer, a varnish layer, and a graphite sheet protective film stacked together.

[0008] The first adhesive layer is attached to the iron frame of the backlight module, and the graphite sheet protective film is removed before the module is shipped.

[0009] Furthermore, the first and second graphite layers rapidly conduct heat in two different horizontal directions.

[0010] Furthermore, the total thickness of the graphite sheet body is 0.09 mm.

[0011] Furthermore, the materials of the first graphite layer and the second graphite layer can be carbon TH-25, good adhesion HNL025 or pebble stone SGF-025-P10A10.

[0012] Furthermore, the varnish layer can be selected from water-based or UV varnish, and the thickness of the varnish can be 1-5µm without affecting the overall thickness of the product. The varnish has the characteristics of high transparency, strong abrasion resistance, scratch resistance, fast film formation speed, rapid drying, high temperature resistance, and good heat sealing performance. The varnish can completely cover PET, effectively preventing the black ink on the PET surface from peeling off due to environmental influences, and improving the scratch resistance of the graphite sheet surface.

[0013] Furthermore, the graphite sheet protective film is transparent, and a tear handle is provided on the side of the graphite sheet protective film. The size can be 6mm*8mm / 5mm*5mm, and the tear handle can be set to red, green, blue, yellow, etc.

[0014] Furthermore, the graphite sheet protective film material can be DMU-ASJa5050-003 from Delta Electronics or H86U4T-NN-050 from Huizhixing, etc., with a thickness of 0.06-0.09mm, a tear-off voltage ≤500V, and a surface resistance of 10 Ω·cm. 9 Ω-10 11 Ω.

[0015] This application also proposes a scratch-resistant double-layer heat-dissipating graphite sheet display module, including a scratch-resistant double-layer heat-dissipating graphite sheet disposed on the iron frame of the backlight module of the display module.

[0016] Compared with the prior art, the present invention has the following main advantages:

[0017] This invention employs a double-layer graphite sheet, which offers superior heat dissipation compared to traditional single-layer graphite sheets. The first and second graphite layers rapidly conduct heat in two different horizontal directions, enabling rapid cooling. The graphite layers possess excellent flexibility, facilitating die-cutting and installation, and exhibit low thermal resistance.

[0018] This invention adds a layer of varnish to the insulating PET layer of traditional graphite sheets. The varnish has the characteristics of high transparency, strong wear resistance, scratch resistance, fast film formation, rapid drying, high temperature resistance, and good heat sealing performance. The varnish can completely cover the PET, which effectively prevents the black ink on the PET surface from falling off due to environmental influences, and improves the scratch resistance of the graphite sheet surface. Attached Figure Description

[0019] To more clearly illustrate the solution of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the structure of an existing heat dissipation graphite sheet;

[0021] Figure 2 This is a schematic diagram of the structure of a scratch-resistant double-layer heat dissipation graphite sheet proposed in this application;

[0022] Figure 3 This is a cross-sectional view of a scratch-resistant double-layer heat-dissipating graphite sheet proposed in this application;

[0023] Figure 4 This is a schematic diagram of the structure of a scratch-resistant double-layer heat dissipation graphite sheet display module proposed in this application;

[0024] In the diagram: 1. Graphite sheet body; 2. Clearance area on the graphite sheet body; 3. Tear handle; 4. Display module;

[0025] 101. First adhesive layer; 102. First graphite layer; 103. Second adhesive layer; 104. Second graphite layer; 105. Insulating PET layer; 106. Varnish layer; 107. Graphite sheet protective film. Detailed Implementation

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0027] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0028] In existing technologies, to improve the heat dissipation performance of display modules, a heat-dissipating graphite sheet (such as...) is usually attached to the iron frame of the backlight module. Figure 1 The heat dissipation graphite sheet consists of an adhesive layer, a graphite layer, and an insulating PET layer stacked from bottom to top. The adhesive layer is attached to the iron frame of the backlight module. The surface of the graphite sheet is easily subjected to friction and scratches from external objects, which can easily lead to scratches, damage, or chipping, affecting the heat dissipation function of the graphite sheet, resulting in poor appearance, and impacting product yield and brand value. Therefore, improvements to the heat dissipation graphite sheet are needed.

[0029] This application provides a scratch-resistant double-layer heat-dissipating graphite sheet, as shown in the reference. Figure 2 , Figure 3 It includes a graphite sheet body 1, which is attached to the iron frame of the backlight module for heat dissipation; the graphite sheet body 1 is provided with a graphite sheet body clearance 2 for FPC conductive double-sided bonding.

[0030] The graphite sheet body 1 includes a first adhesive layer 101, a first graphite layer 102, a second adhesive layer 103, a second graphite layer 104, an insulating PET layer 105, a varnish layer 106, and a graphite sheet protective film 107 stacked from bottom to top.

[0031] The first adhesive layer 101 is attached to the iron frame of the backlight module, and the graphite sheet protective film 107 is removed before the module is shipped.

[0032] This invention uses a double-layer graphite sheet, which has better heat dissipation performance compared to the traditional single-layer graphite sheet. The graphite layer has good flexibility, is easy to die-cut and install, and has low thermal resistance. In addition, this invention adds a layer of varnish to the insulating PET layer 105 of the traditional graphite sheet. The varnish has the characteristics of high transparency, strong wear resistance, scratch resistance, fast film formation, rapid drying, high temperature resistance, and good heat sealing performance. The varnish can completely cover the PET, which effectively prevents the black ink on the PET surface from falling off due to environmental influences, and improves the scratch resistance of the graphite sheet surface.

[0033] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0034] Example 1

[0035] Reference Figure 2 , Figure 3 A scratch-resistant double-layer heat dissipation graphite sheet includes a graphite sheet body 1, which is attached to the iron frame of the backlight module and has a total thickness of 0.09mm for heat dissipation; the graphite sheet body 1 is provided with a graphite sheet body clearance 2 for FPC conductive double-sided adhesion.

[0036] The graphite sheet body 1 includes a first adhesive layer 101, a first graphite layer 102, a second adhesive layer 103, a second graphite layer 104, an insulating PET layer 105, a varnish layer 106, and a graphite sheet protective film 107 stacked from bottom to top.

[0037] The first adhesive layer 101 is attached to the iron frame of the backlight module, and the graphite sheet protective film 107 is removed before the module is shipped.

[0038] The materials of the first graphite layer 102 and the second graphite layer 104 can be carbon TH-25, good adhesion HNL025, or pebble stone SGF-025-P10A10. The first graphite layer 102 and the second graphite layer 104 rapidly conduct heat in two different horizontal directions. For example, the first graphite layer conducts heat to the left, and the second graphite layer conducts heat to the right, achieving rapid cooling. The graphite layers have extremely high thermal conductivity: >1300W / (m*K), and graphite density: ≥1.75g / cm³. 3 It has good flexibility, is easy to die-cut and install, and has low thermal resistance.

[0039] This invention employs a double-layer graphite sheet, which offers superior heat dissipation compared to traditional single-layer graphite sheets. The first graphite layer 102 and the second graphite layer 104 rapidly conduct heat in two different horizontal directions, enabling rapid cooling. The graphite layers possess excellent flexibility, facilitating die-cutting and installation, and exhibit low thermal resistance.

[0040] Example 2

[0041] Reference Figure 2 , Figure 3 This embodiment, based on Embodiment 1, further includes:

[0042] The varnish layer 106 can be either water-based or UV-based, with a thickness ranging from 1-5µm without affecting the overall product thickness. The varnish features high transparency, strong abrasion resistance, scratch resistance, fast film formation, rapid drying, high temperature resistance, and good heat-sealing properties. It can completely cover the PET, effectively preventing ink flaking from the PET surface due to environmental factors and improving the scratch resistance of the graphite sheet surface.

[0043] Example 3

[0044] Reference Figure 2 , Figure 3 This embodiment, based on Embodiment 1 and Embodiment 2, further includes:

[0045] The graphite sheet protective film 107 is transparent. A tear handle 3 is provided on the side of the graphite sheet protective film 107. The size can be 6mm*8mm / 5mm*5mm. The tear handle 3 can be set to red, green, blue, yellow, etc.

[0046] The graphite sheet protective film 107 material can be DMU-ASJa5050-003 from Delta Electronics or H86U4T-NN-050 from Huizhixing, etc. The thickness of the graphite sheet protective film 107 is 0.06-0.09mm, the peel voltage is ≤500V, and the surface resistance is 10. 9 Ω-10 11 Ω.

[0047] Example 4

[0048] Reference Figure 4 This embodiment proposes a scratch-resistant double-layer heat dissipation graphite sheet display module, including the aforementioned scratch-resistant double-layer heat dissipation graphite sheet disposed on the backlight module iron frame of the display module 4.

[0049] By using double-layer graphite sheets in the display module, the heat dissipation performance is superior to that of traditional single-layer graphite sheets, enabling rapid cooling of the display module. It also improves the scratch resistance of the graphite sheet surface in the display module.

[0050] Obviously, the embodiments described above are only some embodiments of this application, not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this application's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this application.

Claims

1. A scratch-resistant double-layer heat-dissipating graphite sheet, characterized in that, Includes a graphite sheet body (1), which is attached to the iron frame of the backlight module for heat dissipation; the graphite sheet body (1) is provided with a graphite sheet body clearance space (2) for FPC conductive double-sided bonding. The graphite sheet body (1) includes a first adhesive layer (101), a first graphite layer (102), a second adhesive layer (103), a second graphite layer (104), an insulating PET layer (105), a varnish layer (106), and a graphite sheet protective film (107) stacked from bottom to top. The first adhesive layer (101) is attached to the iron frame of the backlight module, and the graphite sheet protective film (107) is removed before the module is shipped.

2. The graphite sheet according to claim 1, characterized in that, The first graphite layer (102) and the second graphite layer (104) conduct heat rapidly in two different horizontal directions.

3. The graphite sheet according to claim 1, characterized in that, The total thickness of the graphite sheet body (1) is 0.09 mm.

4. The graphite sheet according to claim 1, characterized in that, The materials of the first graphite layer (102) and the second graphite layer (104) can be carbon TH-25, good adhesion HNL025 or pebble stone SGF-025-P10A10.

5. The graphite sheet according to claim 1, characterized in that, The varnish layer (106) can be water-based varnish or UV varnish, and the thickness of the varnish can be 1-5 μm.

6. The graphite sheet according to claim 1, characterized in that, The graphite sheet protective film (107) is transparent, and a tear handle (3) is provided on the side of the graphite sheet protective film (107).

7. The graphite sheet according to claim 6, characterized in that, The material of the graphite sheet protective film (107) can be DMU-ASJa5050-003 from Damei or H86U4T-NN-050 from Huizhixing.

8. The graphite sheet according to claim 7, characterized in that, The graphite sheet protective film (107) has a thickness of 0.06-0.09 mm, a tear-off voltage ≤ 500V, and a surface resistance of 10 Ω·cm. 9 Ω-10 11 Ω.

9. A display module, characterized in that, Includes the scratch-resistant double-layer heat-dissipating graphite sheet as described in claim 1, which is disposed on the backlight module frame of the display module (4).

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