Composite board, backlight module, display equipment and lighting equipment
By using a composite plate design with foamed PET film layer and diffusion structure in the light-transmissive light mixing plate, the problems of weak and high cost of existing light-transmissive light mixing plates are solved, and stronger structural strength and better light diffusion are achieved, while reducing costs.
Patent Information
- Application Number
- CN202422080753.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-27
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-27
AI Technical Summary
The existing light-transmitting light mixing plates have weak structural strength, are prone to fragmentation, and are costly.
A composite plate structure is adopted, which includes a foamed PET film layer and a diffusion structure. The foamed PET film layer is arranged on both sides of the diffusion structure. The diffusion structure is composed of a transparent glue water layer and a plurality of transparent glass microbeads.
Through the combination of foamed PET film layer and diffusion structure, the structural intensity and light diffusion of the composite panel are improved, while reducing the overall cost.
Smart Images
Figure CN223038204U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of optical display technologies, and in particular, to a composite board, a backlight module, a display device, and a lighting device. Background Art
[0002] Currently, the light-transmitting and light-mixing boards used in display devices such as televisions or lighting devices such as flat panel lights are mainly formed by extruding GPPS (general purpose polystyrene, commonly known as transparent benzene) transparent particles and additives such as diffusing agents after stirring to form a semi-transparent board, commonly known as a PS diffuser board. However, the PS diffuser board in related technologies has weak structural strength, is prone to breakage, and has a high cost. Summary of the Utility Model
[0003] Embodiments of the present application provide a composite board, a backlight module, a display device, and a lighting device, which can solve the problems of weak structural strength, easy breakage, and high cost of the light-transmitting and light-mixing boards used in display devices such as televisions or lighting devices such as flat panel lights in related technologies.
[0004] In a first aspect, an embodiment of the present application provides a composite board; the composite board includes a diffusion structure and a foamed PET film layer. The diffusion structure includes a transparent glue layer and a plurality of transparent glass microspheres. The plurality of transparent glass microspheres are embedded in the transparent glue layer. The foamed PET film layer has light transmissivity, and the foamed PET film layer is disposed on both sides of the diffusion structure along its own thickness direction.
[0005] In some embodiments, the thickness H1 of the foamed PET film layer is greater than or equal to 0.15 mm and less than or equal to 0.4 mm.
[0006] In some embodiments, the thickness H2 of the transparent glue layer is greater than or equal to 0.1 mm and less than or equal to 0.5 mm.
[0007] In some embodiments, the plurality of transparent glass microspheres are spherical beads, and the diameters of the plurality of transparent glass microspheres are not equal.
[0008] In some embodiments, the plurality of transparent glass microspheres include a first transparent glass microsphere, a second transparent glass microsphere, and a third transparent glass microsphere; the diameter of the first transparent glass microsphere is 0.1 mm, and / or the diameter of the second transparent glass microsphere is 0.2 mm, and / or the diameter of the third transparent glass microsphere is 0.3 mm.
[0009] In some embodiments, the preparation material of the transparent glue layer is one of cyanoacrylate, ethyl acrylate, and epoxy acrylate.
[0010] Second aspect, an embodiment of the present application provides a backlight module; the backlight module includes a light source and the above-mentioned composite board, and the composite board is arranged on the light-emitting side of the light source.
[0011] Third aspect, an embodiment of the present application provides a display device; the display device includes a display panel and the above-mentioned backlight module, and the backlight module is arranged on the light-incident side of the display panel.
[0012] Fourth aspect, an embodiment of the present application provides a lighting device; the lighting device includes a housing and the above-mentioned composite board, and the composite board is installed in the housing.
[0013] Based on the composite board, backlight module, display device and lighting device of the embodiments of the present application, the porous micro-foaming structure distributed inside the foamed PET film layer has a diffusing effect on the light projected by the light source of the backlight module; and the transparent glass beads in the diffusing structure also have a diffusing effect on the light projected by the light source of the backlight module; thus, the foamed PET film layer and the diffusing structure cooperate to be able to diffusely reflect the light projected by the light source of the backlight module multiple times, so that the composite board has good light diffusibility. The foamed PET film layer itself has high hardness; and the transparent glass beads in the diffusing structure are equivalent to reinforcing bodies; they can effectively enhance the hardness of the diffusing structure; thus, the foamed PET film layer with high hardness and the diffusing structure with high hardness cooperate to be able to effectively enhance the overall structural strength of the composite board, so as to effectively reduce the possibility of the composite board being bent or broken. The foamed PET film layer itself has low cost; and the transparent glass beads themselves also have low cost; thus, the foamed PET film layer with low cost and the diffusing structure with low cost cooperate to make the overall cost of the composite board relatively low. Description of the Drawings
[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0015] Figure 1 It is a schematic cross-sectional structure diagram of a composite board in an embodiment of the present application;
[0016] Figure 2 It is a schematic cross-sectional structure diagram of a composite board in another embodiment of the present application;
[0017] Figure 3 It is Figure 1 The enlarged structure diagram of part A in
[0018] Reference numerals: 1, composite board; 10, diffusion structure; 11, transparent glue layer; 12, transparent glass beads; 12a, first transparent glass bead; 12b, second transparent glass bead; 12c, third transparent glass bead; 20, foamed PET film layer. Detailed implementation manners
[0019] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0020] Please refer to Figure 1 As shown, in a first aspect, the present application provides a composite board 1 which has good diffusion effect on light, and has strong hardness and low cost.
[0021] The composite board 1 includes a diffusion structure 10 and a foamed PET film layer 20. The diffusion structure 10 includes a transparent glue layer 11 and a plurality of transparent glass beads 12; the plurality of transparent glass beads 12 are embedded in the transparent glue layer 11. The foamed PET film layer 20 has light transmittance, and the foamed PET film layer 20 is disposed on both sides of the diffusion structure 10 along its own thickness direction.
[0022] The following Figures 1 - 3 will expand and introduce the specific structure of the composite board 1. The composite board 1 includes a foamed PET film layer 20 and a diffusion structure 10.
[0023] As Figure 1 shown, the foamed PET film layer 20 serves as a reinforcing layer of the composite board 1; the foamed PET film layer 20 has light transmittance, and the light projected by the light source of the backlight module can pass through the foamed PET film layer 20; the foamed PET film layer 20 has strong hardness and low cost.
[0024] The foamed PET film layer 20 is made of PET material and processed by a foaming technique. Porous micro-foamed structures such as bubbles are distributed inside the foamed PET film layer 20. It should be noted that the porous micro-foamed structures distributed inside the foamed PET film layer 20 have a diffusion effect on the light projected by the light source of the backlight module. That is, during the process that the light projected by the light source of the backlight module passes through the foamed PET film layer 20, the propagation path of the light will spread outward after passing through the porous micro-foamed structures.
[0025] As Figure 1 shown, the diffusion structure 10 serves as a diffusion layer of the composite board 1, and it has a diffusion effect on the light projected by the light source of the backlight module; the diffusion structure 10 includes a transparent glue layer 11 and a plurality of transparent glass beads 12.
[0026] The transparent glue layer 11 serves as the base layer of the diffusion structure 10; the transparent glue layer 11 has good light transmittance, and the light projected by the light source of the backlight module can pass through the transparent glue layer 11; the transparent glue layer 11 also has good adhesiveness, and it can play a good fixing role for the foamed PET film layer 20.
[0027] The transparent glass beads 12 serve as the diffusing elements of the diffusion structure 10, and they have good light transmittance and good diffusivity for light.
[0028] The number of the transparent glass beads 12 is multiple (more than two), and the multiple transparent glass beads 12 are embedded in the transparent glue layer 11. It should be noted that the transparent glass beads 12 themselves have high hardness and low cost. By embedding the multiple transparent glass beads 12 in the transparent glue layer 11, the transparent glass beads 12 are equivalent to reinforcing bodies, which can effectively enhance the hardness of the diffusion structure 10 to effectively reduce the possibility of the diffusion structure 10 being bent or broken.
[0029] The foamed PET film layer 20 is arranged on both sides of the diffusion structure 10 along its own thickness direction. It should be noted that the number of the diffusion structures 10 can be one or multiple; for example, as Figure 1 shown, when the number of the diffusion structures 10 is one, the number of the foamed PET film layers 20 is two at this time, and the two foamed PET film layers 20 are respectively arranged on both sides of the one diffusion structure 10 along the thickness direction of the diffusion structure 10; and for another example, as Figure 2 shown, when the number of the diffusion structures 10 is two, the number of the foamed PET film layers 20 is three at this time, and the three foamed PET film layers 20 and the two diffusion structures 10 are arranged alternately along the thickness direction of the diffusion structure 10. Of course, the number of the diffusion structures 10 can also be three, four or more; the number of the foamed PET film layers 20 also corresponds to four, five or more; and so on, which will not be elaborated here.
[0030] Based on the composite board 1 in the embodiments of the present application, the porous micro-foaming structure distributed inside the foamed PET film layer 20 has a diffusing effect on the light projected by the light source of the backlight module; and the transparent glass beads 12 in the diffusion structure 10 also have a diffusing effect on the light projected by the light source of the backlight module; thus, the foamed PET film layer 20 and the diffusion structure 10 cooperate to be able to diffusely reflect the light projected by the light source of the backlight module multiple times, so that the composite board 1 has good light diffusibility. The foamed PET film layer 20 itself has high hardness; and the transparent glass beads 12 in the diffusion structure 10 are equivalent to reinforcing bodies; and can effectively enhance the hardness of the diffusion structure 10; thus, the foamed PET film layer 20 with high hardness and the diffusion structure 10 with high hardness cooperate to be able to effectively enhance the overall structural strength of the composite board 1 to effectively reduce the possibility of the composite board 1 being bent or broken. The foamed PET film layer 20 itself has low cost; and the transparent glass beads 12 themselves also have low cost; thus, the foamed PET film layer 20 with low cost and the diffusion structure 10 with low cost cooperate to make the overall cost of the composite board 1 relatively low.
[0031] As Figure 1 shown, the thickness H1 of the foamed PET film layer 20 is greater than or equal to 0.15 mm and less than or equal to 0.4 mm. For example, the thickness H1 of the foamed PET film layer 20 can be but is not limited to 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm or 0.4 mm. By reasonably designing the thickness H1 of the foamed PET film layer 20, it is possible to ensure that the foamed PET film layer 20 has a good diffusing effect on the light projected by the light source of the backlight module, and at the same time ensure that the foamed PET film layer 20 has high hardness to effectively reduce the possibility of the composite board 1 being bent or broken.
[0032] As Figure 1 shown, the thickness H2 of the transparent glue layer 11 is greater than or equal to 0.1 mm and less than or equal to 0.5 mm. For example, the thickness H2 of the transparent glue layer 11 can be but is not limited to 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm or 0.5 mm. By reasonably designing the thickness H2 of the transparent glue layer 11, it is possible to ensure that as many transparent glass beads 12 as possible are embedded in the transparent glue layer 11, and at the same time ensure the good fixing effect of the transparent glue layer 11 on the foamed PET film layer 20.
[0033] As Figure 1 and Figure 3 shown, the plurality of transparent glass beads 12 are spherical beads, and the diameters of the plurality of transparent glass beads 12 are not equal. By designing the diameters of the plurality of transparent glass beads 12 to be not equal, the transparent glass beads 12 with unequal diameters can be mixed more evenly with the transparent glue layer 11, so that the diffusion structure 10 has a better diffusing effect on the light projected by the light source of the backlight module.
[0034] Specifically, the plurality of transparent glass beads 12 include a first transparent glass bead 12a, a second transparent glass bead 12b, and a third transparent glass bead 12c; the diameter of the first transparent glass bead 12a is 0.1 mm, and / or the diameter of the second transparent glass bead 12b is 0.2 mm, and / or the diameter of the third transparent glass bead 12c is 0.3 mm. By designing the diameter of the first transparent glass bead 12a to be 0.1 mm, and / or the diameter of the second transparent glass bead 12b to be 0.2 mm, and / or the diameter of the third transparent glass bead 12c to be 0.3 mm, the diffusion effect of the diffusion structure 10 on the light projected by the light source of the backlight module can be better.
[0035] Such as Figure 1 shown, the preparation material of the transparent glue layer 11 is one of cyanoacrylate, ethyl acrylate, and epoxy acrylate. By designing the material of the transparent glue layer 11 to be one of cyanoacrylate, ethyl acrylate, and epoxy acrylate, the raw materials are extensive, easy to obtain, and the cost is low.
[0036] In a second aspect, the present application provides a backlight module (not shown in the figure), which includes a light source and the above-mentioned composite plate 1; the composite plate 1 is disposed on the light-emitting side of the light source.
[0037] Based on the backlight module in the embodiments of the present application, having the above-mentioned composite plate 1, it has a good diffusion effect on the light projected by the light source, and has strong hardness and low cost.
[0038] In a third aspect, the present application provides a display device (not shown in the figure), which includes a display panel and the above-mentioned backlight module; the backlight module is disposed on the light-incident side of the display panel.
[0039] Among them, the display device can be, but is not limited to, a tablet, a computer, a television, an in-vehicle display screen, and the like.
[0040] Based on the display device in the embodiments of the present application, having the above-mentioned backlight module, it has a good diffusion effect on the light projected by the light source, and has strong hardness and low cost.
[0041] In a fourth aspect, the present application provides a lighting device (not shown in the figure), which includes a housing and the above-mentioned composite plate 1; the composite plate 1 is installed on the housing.
[0042] Among them, the lighting device can be, but is not limited to, a flat lamp or a wall lamp, and the like.
[0043] Based on the lighting device in the embodiments of the present application, having the above-mentioned composite plate 1, it has a good diffusion effect on the light projected by the light source, and has strong hardness and low cost.
[0044] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of this application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and cannot be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.
[0045] The above are only the preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.
Claims
1. A composite board, characterized in that: include: A diffusion structure, comprising a transparent glue layer and a plurality of transparent glass micro-beads, wherein the plurality of transparent glass micro-beads are embedded in the transparent glue layer; The foamed PET film layer is light-transmissive and is arranged on both sides of the diffusion structure along its own thickness direction.
2. The composite panel according to claim 1, characterized in that The thickness H1 of the foamed PET film layer is greater than or equal to 0.15 mm and less than or equal to 0.4 mm.
3. The composite panel according to claim 1, characterized in that: The thickness H2 of the transparent glue layer is greater than or equal to 0.1 mm and less than or equal to 0.5 mm.
4. The composite panel according to claim 3, characterized in that: The plurality of transparent glass micro-beads are round beads, and the diameters of the plurality of transparent glass micro-beads are not equal.
5. The composite panel according to claim 4, characterized in that The plurality of transparent glass microbeads include first transparent glass microbeads, second transparent glass microbeads and third transparent glass microbeads; the diameter of the first transparent glass microbeads is 0.1 mm, and / or the diameter of the second transparent glass microbeads is 0.2 mm, and / or the diameter of the third transparent glass microbeads is 0.3 mm.
6. The composite plate according to any one of claims 1 to 5, characterized in that: The transparent glue layer is prepared from a material selected from the group consisting of cyanoacrylate, ethyl acrylate and epoxy acrylate.
7. A backlight module, characterized in that: include: light source; The composite plate according to any one of claims 1 to 6, wherein the composite plate is arranged on the light emitting side of the light source.
8. A display device, characterized in that: include: Display panel; The backlight module as claimed in claim 7, wherein the backlight module is arranged on a light incident side of the display panel.
9. A lighting device, characterized in that: include: case; The composite plate according to any one of claims 1 to 6, wherein the composite plate is mounted on the shell.