Graphite film and light guide plate integrated structure

Abstract

The utility model relates to light guide plate technical field discloses graphite film and light guide plate integration structure, including light guide plate main part, including the opposite setting light exit surface and non -light exit surface, graphite composite film, integrative pasting on the non -light exit surface of light guide plate main part, the utility model discloses the graphite composite film is integrated in the non -light exit surface side of light guide plate main part, forms integral type structure, applies in the light emitting keyboard, replaces the separate reflector and heat dissipation film structure in prior art, integrates graphite composite film after the light guide plate main part manufacturing is completed, compares the mode of separate assembly graphite film, reduces the pasting position deviation and breakage risk, and the heat absorbed by light guide plate body is quickly transverse diffusion and leads out, improves the heat conduction uniformity.

Description

Technical Field

[0001] This utility model relates to the field of light guide plate technology, specifically to an integrated structure of graphite film and light guide plate. Background Technology

[0002] An illuminated keyboard is a type of keyboard with excellent visual effects, which is achieved by setting up a backlight module to emit light.

[0003] In the prior art, such as Chinese Patent Publication No. CN222619617U, a MINI keyboard backlight module is disclosed, including a light-shielding film, a light guide plate, a reflective film, and a light board arranged sequentially from top to bottom. In use, activating the light board lights up multiple LED beads to emit light. The point light source is converted into a surface light source through LED holes on the light guide plate. The light then enters the light-shielding film and exits outside the keyboard. At this time, the pattern section blocks the light from passing through, creating alternating light and dark to highlight the content of the pattern, making it easier for the user to observe.

[0004] However, in actual use, the LEDs in the keyboard backlight module generate heat when they are lit, causing the light guide plate to heat up. The conventional method is to heat up by attaching a graphite heat dissipation film to the back of the light board or between the reflective film and the light board. However, this method is not very effective at dissipating heat, and the graphite heat dissipation film is also prone to damage when assembled separately.

[0005] Therefore, it is necessary to propose an integrated structure of graphite film and light guide plate to at least partially solve the problems existing in the prior art. Utility Model Content

[0006] The utility model description section introduces a series of simplified concepts, which will be further explained in detail in the detailed description section. This utility model description section is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0007] To address the aforementioned problems, this utility model discloses an integrated structure of graphite film and light guide plate; it includes:

[0008] The light guide plate body includes a light-emitting surface and a non-light-emitting surface that are arranged opposite to each other;

[0009] The graphite composite film is integrally bonded to the non-light-emitting surface of the light guide plate body.

[0010] Preferably, the graphite composite film includes a substrate graphite layer and a first black and white adhesive layer. The first black and white adhesive layer is disposed on the side of the substrate graphite layer near the non-light-emitting surface. The side of the first black and white adhesive layer near the substrate graphite layer is provided with black single-sided adhesive, and the other side is provided with a white printing layer.

[0011] Preferably, the thickness of the graphite layer in the substrate is set to 0.025–0.075 mm.

[0012] Preferably, the graphite composite film further includes a second black and white adhesive layer, which is disposed on the side of the substrate graphite layer away from the non-light-emitting surface. The side of the second black and white adhesive layer closest to the substrate graphite layer is provided with white single-sided adhesive, and the other side is provided with a black printing layer.

[0013] Preferably, the graphite composite film further includes a first hydrogel layer, which is located on the side of the first black and white adhesive layer near the non-light-emitting surface.

[0014] Preferably, the thickness of the first black and white adhesive layer and the second black and white adhesive layer is set to 0.004 to 0.125 mm.

[0015] Preferably, the overall thickness of the structure is set to 0.05mm to 0.15mm.

[0016] Preferably, the graphite layer of the substrate is configured as a single layer or a stacked multilayer.

[0017] Preferably, the graphite composite film further includes a second hydrogel layer, which is located on the side of the second black and white adhesive layer away from the non-light-emitting surface.

[0018] Preferably, the surfaces of the first and second water-based adhesive layers are respectively covered with a first release film and a second release film, and handles are provided on the first and second release films.

[0019] Compared with the prior art, the present invention has at least the following beneficial effects:

[0020] The integrated graphite film and light guide plate structure provided in this embodiment integrates the graphite composite film on the non-light-emitting side of the light guide plate body to form an integrated structure. It is used in a backlit keyboard to replace the separate reflector and heat dissipation film structure in the prior art. The graphite composite film is integrated after the light guide plate body is manufactured. Compared with the method of assembling the graphite film separately, it reduces the risk of adhesive position deviation and damage. It also allows the heat absorbed by the light guide plate body to be quickly diffused and discharged laterally, improving the heat conduction uniformity.

[0021] The integrated graphite film and light guide plate structure of this utility model, other advantages, objectives and features of this utility model will be partly apparent from the following description, and partly understood by those skilled in the art through research and practice of this utility model. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a schematic cross-sectional view of the graphite composite film in this utility model.

[0025] Figure 3 This is a cross-sectional structural diagram of the graphite composite film in this utility model (with sealing film);

[0026] Figure 4 This is a schematic diagram of the structure of the illuminated keyboard in this utility model.

[0027] In the diagram: 1. Light guide plate body; 11. Light-emitting surface; 12. Non-light-emitting surface; 2. Graphite composite film; 21. Substrate graphite layer; 22. Black single-sided adhesive; 23. White printing layer; 24. White single-sided adhesive; 25. Black printing layer; 26. First water-based adhesive layer; 27. Second water-based adhesive layer; 28. First release film; 29. ​​Second release film; 31. Edge sealing film; 32. Wedge-shaped cut. Detailed Implementation

[0028] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] Example

[0030] The present invention will now be further described with reference to the accompanying drawings.

[0031] like Figures 1-4 As shown, the integrated graphite film and light guide plate structure provided in this embodiment includes:

[0032] The light guide plate body 1 includes a light-emitting surface 11 and a non-light-emitting surface 12 that are arranged opposite to each other;

[0033] The graphite composite film 2 is integrally bonded to the non-light-emitting surface 12 of the light guide plate body 1.

[0034] The working principle and beneficial effects of this utility model are as follows:

[0035] The integrated graphite film and light guide plate structure provided in this embodiment integrates the graphite composite film 2 on the non-light-emitting surface 12 side of the light guide plate body 1 to form an integrated structure. It is used in a backlit keyboard to replace the separate reflector and heat dissipation film structure in the prior art. The graphite composite film 2 is integrated after the light guide plate body 1 is manufactured. Compared with the method of assembling the graphite film separately, it reduces the risk of adhesive position deviation and damage. It also allows the heat absorbed by the light guide plate body 1 to be quickly diffused and discharged laterally, improving the heat conduction uniformity.

[0036] In one embodiment, the graphite composite film 2 includes a substrate graphite layer 21 and a first black and white adhesive layer. The first black and white adhesive layer is disposed on the side of the substrate graphite layer 21 near the non-light-emitting surface 12. The side of the first black and white adhesive layer near the substrate graphite layer 21 is provided with black single-sided adhesive 22, and the other side is provided with a white printing layer 23.

[0037] The working principle and beneficial effects of the above scheme are as follows:

[0038] The first black and white monochrome adhesive layer, also known as the first PET layer, replaces the reflective sheet in the prior art. The white printed layer 23 faces the light guide plate body 1 and has a high reflectivity, reflecting light back to the light guide plate body 1. This helps improve the overall light utilization efficiency of the keyboard backlight module, thereby enhancing the brightness and uniformity of the keyboard's illumination. The black single-sided adhesive 22 on the other side absorbs stray light leaking from the edge of the light guide plate body 1 or directly from the light source, preventing light leakage.

[0039] In one embodiment, the graphite composite film 2 further includes a second black and white adhesive layer. The second black and white adhesive layer is disposed on the side of the substrate graphite layer 21 away from the non-light-emitting surface 12. The side of the second black and white adhesive layer close to the substrate graphite layer 21 is provided with white single-sided adhesive 24, and the other side is provided with a black printing layer 25.

[0040] The working principle and beneficial effects of the above scheme are as follows:

[0041] The second black and white adhesive layer, also known as the second PET layer, has the black printed layer 25 facing away from the substrate graphite layer 21 to absorb stray light leaking from the lamp board and prevent light leakage. The white single-sided adhesive 24 is placed close to the substrate graphite layer 21 to reflect the stray light that has already leaked out, preventing light from passing through and affecting the light guiding effect of the light guide plate body 1.

[0042] In one embodiment, the thickness of the substrate graphite layer 21 is set to 0.025–0.075 mm.

[0043] In one embodiment, the thickness of the first black and white adhesive layer and the second black and white adhesive layer is set to 0.004 to 0.125 mm.

[0044] In one embodiment, the overall thickness of the structure is set to 0.05mm to 0.15mm.

[0045] In one embodiment, the substrate graphite layer 21 is configured as a single layer or a stacked multilayer.

[0046] The working principle and beneficial effects of the above scheme are as follows:

[0047] Within the allowable thickness range, stacking as many graphite layers as possible can absorb and dissipate more heat, improving thermal conductivity. At the same time, multiple layers of graphite can improve the overall stiffness of the graphite composite film 2.

[0048] In one embodiment, the graphite composite film 2 further includes a first hydrogel layer 26, which is located on the side of the first black and white adhesive layer near the non-light-emitting surface 12.

[0049] The working principle and beneficial effects of the above scheme are as follows:

[0050] The first water-based adhesive layer 26 is used to bond the graphite composite film 2 to the light guide plate body 1 to form an integrated structure.

[0051] In one embodiment, the graphite composite film 2 further includes a second water-based adhesive layer 27, which is located on the side of the second black and white adhesive layer away from the non-light-emitting surface 12.

[0052] The working principle and beneficial effects of the above scheme are as follows:

[0053] The second water-based adhesive layer 27 is used to bond the formed graphite film and light guide plate integrated structure to the lamp plate, which facilitates the fixation of the light guide plate structure.

[0054] In one embodiment, the surfaces of the first water-based adhesive layer 26 and the second water-based adhesive layer 27 are respectively covered with a first release film 28 and a second release film 29, and handles are provided on the first release film 28 and the second release film 29.

[0055] The working principle and beneficial effects of the above scheme are as follows:

[0056] The first release film 28 and the second release film 29 protect the first water-based adhesive layer 26 and the second water-based adhesive layer 27 respectively. When the graphite composite film 2 is bonded to the light guide plate body 1, the first release film 28 is peeled off by the handle. When the integrated structure is bonded to the lamp board, the second release film 29 is peeled off by the handle.

[0057] In one embodiment, the graphite composite film 2 has a sealing film 31 on its side, and the sealing film 31 has a plurality of wedge-shaped cuts 32.

[0058] The working principle and beneficial effects of the above scheme are as follows:

[0059] The sealing film 31 can be adhered to the side of the graphite composite film 2. The sealing film 31 protects the sides of each layer of the graphite composite film 2. A wedge-shaped cut 32 is provided on the sealing film 31. The position of the wedge-shaped cut 32 corresponds to the position of the first black and white adhesive layer and the second black and white adhesive layer. The light that shines on the sealing film 31 is reflected into the adhesive layer through the wedge-shaped cut 32, so as to uniformize the light and reduce the light leakage phenomenon on the side of the graphite composite film 2.

[0060] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0061] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An integrated structure of graphite film and light guide plate, characterized in that, include: The light guide plate body (1) includes a light-emitting surface (11) and a non-light-emitting surface (12) arranged opposite to each other; A graphite composite film (2) is integrally bonded to the non-light-emitting surface (12) of the light guide plate body (1).

2. The integrated structure of graphite film and light guide plate according to claim 1, characterized in that, The graphite composite film (2) includes a substrate graphite layer (21) and a first black and white adhesive layer. The first black and white adhesive layer is disposed on the side of the substrate graphite layer (21) near the non-light-emitting surface (12). The side of the first black and white adhesive layer near the substrate graphite layer (21) is provided with black single-sided adhesive (22), and the other side is provided with a white printing layer (23).

3. The integrated structure of graphite film and light guide plate according to claim 2, characterized in that, The thickness of the substrate graphite layer (21) is set to 0.025 to 0.075 mm.

4. The integrated structure of graphite film and light guide plate according to claim 2, characterized in that, The graphite composite film (2) also includes a second black and white adhesive layer. The second black and white adhesive layer is disposed on the side of the substrate graphite layer (21) away from the non-light-emitting surface (12). The side of the second black and white adhesive layer close to the substrate graphite layer (21) is set as white single-sided adhesive (24), and the other side is set as black printing layer (25).

5. The integrated structure of graphite film and light guide plate according to claim 2, characterized in that, The graphite composite film (2) also includes a first water-based adhesive layer (26), which is located on the side of the first black and white adhesive layer near the non-light-emitting surface (12).

6. The integrated structure of graphite film and light guide plate according to claim 4, characterized in that, The thicknesses of the first and second black and white adhesive layers are set to 0.004–0.125 mm.

7. The integrated structure of graphite film and light guide plate according to claim 1, characterized in that, The overall thickness of the structure is set to 0.05mm to 0.15mm.

8. The integrated structure of graphite film and light guide plate according to claim 2, characterized in that, The substrate graphite layer (21) is configured as a single layer or a stacked multilayer.

9. The integrated structure of graphite film and light guide plate according to claim 5, characterized in that, The graphite composite film (2) also includes a second water-based adhesive layer (27), which is located on the side of the second black and white adhesive layer away from the non-light-emitting surface (12).

10. The integrated structure of graphite film and light guide plate according to claim 9, characterized in that, The surfaces of the first water-based adhesive layer (26) and the second water-based adhesive layer (27) are respectively covered with a first release film (28) and a second release film (29), and handles are provided on the first release film (28) and the second release film (29).

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