Ultrathin direct type backlight module

Abstract

The utility model relates to an ultrathin direct type backlight module which comprises a transparent base material, a diffusion particle layer and a lamp panel arranged below the transparent base material, the diffusion particle layer is attached to the side, away from the lamp panel, of the transparent base material, and a plurality of grooves are formed in the side, close to the lamp panel, of the transparent base material. The lamp panel comprises a plurality of light-emitting units arranged in a matrix mode, and the light-emitting units extend into the grooves. According to the backlight module, the diffusion particle layer is attached to the transparent base material, occupied space is reduced, the thickness of the module is reduced, meanwhile, the grooves are formed in the side, close to the lamp panel, of the transparent base material, the light-emitting units extend into the grooves, the overall thickness of the backlight module is further reduced, and the display device is lighter and thinner.

Description

Technical Field

[0001] The utility model relates to the technical field of display, in particular to an ultra-thin direct-lit backlight module. Background Art

[0002] As an important component of liquid crystal display technology, the direct backlight design has one of the core goals of ensuring uniform brightness across all areas of the screen, thereby providing a high-quality visual experience. In traditional designs, a diffuser is usually provided above the light-emitting unit. Its main function is to evenly atomize the light emitted by the light-emitting unit to reduce or eliminate bright spots and halos on the screen. During assembly, an additional fixing structure is required to fix the diffuser. In this case, the overall thickness of the backlight module is significantly increased. The increase in thickness not only affects the aesthetic appearance of the display device, making it bulky and inconvenient to carry, but also increases the size and weight of the device, limiting the user's usage scenarios and portability. Utility Model Content

[0003] The purpose of the present utility model is to provide an ultra-thin direct-type backlight module, which reduces the space occupied by the diffusion particle layer and thus reduces the thickness of the module by laminating the diffusion particle layer to the transparent substrate. At the same time, grooves are provided on the side of the transparent substrate close to the light board, and the light-emitting units are extended into these grooves, thereby further reducing the overall thickness of the backlight module and making the display device lighter and thinner.

[0004] An ultra-thin direct-lit backlight module comprises a transparent substrate, a diffusion particle layer, and a light board disposed below the transparent substrate. The diffusion particle layer is attached to a side of the transparent substrate away from the light board. A plurality of grooves are provided on a side of the transparent substrate close to the light board. The light board comprises a plurality of light-emitting units arranged in a matrix, and the light-emitting units extend into the grooves.

[0005] In the above technical solution, the diffusion particle layer is directly adhered to the transparent substrate without any additional spacer layer or air gap, which reduces the scattering and reflection of light during propagation, and also reduces the space occupied inside the module, which helps to reduce the overall thickness of the module. At the same time, grooves are designed on the side of the transparent substrate close to the light board, and the light-emitting units are extended into these grooves, which reduces the space occupied between the light-emitting units and the transparent substrate. Compared with the traditional direct-type backlight module, this design avoids the situation where the light-emitting units are outside the module or require additional space for assembly, further reducing the overall thickness of the module. The utility model reduces the space occupied by adhering the diffusion particle layer to the transparent substrate, thereby reducing the thickness of the module. At the same time, grooves are provided on the side of the transparent substrate close to the light board, and the light-emitting units are extended into these grooves, further reducing the overall thickness of the backlight module, making the display device thinner and lighter.

[0006] Furthermore, the thickness of the diffusion particle layer is 0.1 mm to 2 mm.

[0007] In the above technical solution, the primary function of the diffusion particle layer is to scatter light, distributing it more evenly across the screen. When the thickness of the diffusion particle layer is within the range of 0.1mm to 2mm, light passing through the layer is effectively and evenly scattered, avoiding bright and dark spots on the screen, thereby improving image uniformity and clarity.

[0008] Furthermore, the transparent substrate is selected from glass, polycarbonate, polyethylene terephthalate, polyimide, or polymethyl methacrylate.

[0009] In the above technical solutions, glass, polycarbonate, polyethylene terephthalate, polyimide, and polymethyl methacrylate all have excellent light transmittance, ensuring that light is minimally lost when passing through the transparent substrate. High light transmittance helps increase screen brightness, making the display brighter and clearer.

[0010] Furthermore, it also includes an isolation part, which is arranged in a grid shape in the transparent substrate to divide the transparent substrate into a plurality of areas, and each area is correspondingly provided with one of the grooves.

[0011] In the above technical solution, the grid-like design of the isolation portion divides the transparent substrate into several regions. Each region corresponds to a groove that accommodates the light-emitting units. This design ensures uniform distribution of the light-emitting units within the module while reducing crosstalk between different regions, thereby improving the display quality.

[0012] Furthermore, the areas are of the same size.

[0013] In the above technical solution, since the light of each light-emitting unit is confined to the corresponding area, and the areas are of the same size, the backlight module can generate more uniform backlight, which helps to improve the visual effect and image quality of the display.

[0014] Furthermore, the thickness of the isolation portion is 0.01 mm to 0.2 mm.

[0015] In the above technical solution, the thickness of the isolation portion is set within the range of 0.01mm to 0.2mm, which can ensure the strength of the isolation portion while reducing its obstruction to light propagation. In other words, it can maintain the high light transmittance of the module while ensuring the light control effect.

[0016] Furthermore, a reflective film is provided on the surface of the isolation portion facing the region.

[0017] In the above technical solution, the reflective film can reflect some of the light that might have been scattered or escaped, redirecting it back into the intended light path. This helps improve light utilization, reduce light loss, and thus enhance the overall brightness of the backlight module.

[0018] Furthermore, the isolation portion is made of light-shielding material.

[0019] In the above technical solution, the shading material can effectively block the mutual influence of light from two adjacent areas, avoid light interference and light leakage, and help improve the contrast and clarity of the display image, making the image sharper and more realistic.

[0020] Compared with the prior art, the beneficial effects of the present invention are: by adhering the diffusion particle layer to the transparent substrate, the space occupied is reduced, thereby reducing the thickness of the module; at the same time, grooves are provided on the side of the transparent substrate close to the light board, and the light-emitting units are extended into these grooves, thereby further reducing the overall thickness of the backlight module, making the display device lighter and thinner. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a cross-sectional diagram of the assembled ultra-thin direct-lit backlight module according to an embodiment of the present invention.

[0022] Figure 2 This is a schematic structural diagram of the top of the transparent substrate according to an embodiment of the present invention.

[0023] Figure 3 This is a schematic structural diagram of the bottom of the transparent substrate according to an embodiment of the present invention.

[0024] Figure 4 This is a schematic structural diagram of the assembled ultra-thin direct-lit backlight module according to an embodiment of the present invention.

[0025] Explanation of Figure Numbers

[0026] 1. Transparent substrate; 101. Groove; 102. Region;

[0027] 2. Diffusion particle layer; 3. Light board; 4. Light-emitting unit; 5. Isolation part. DETAILED DESCRIPTION

[0028] The following will further describe the ultra-thin direct-lit backlight module of the present invention in detail with reference to specific embodiments and accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0029] Please refer to Figures 1 to 4In a preferred embodiment, the ultra-thin direct-lit backlight module of the present invention includes a transparent substrate 1, a diffusion particle layer 2, and a light board 3 arranged below the transparent substrate 1. The diffusion particle layer 2 is attached to the side of the transparent substrate 1 away from the light board 3. A plurality of grooves 101 are provided on the side of the transparent substrate 1 close to the light board 3. The light board 3 includes a plurality of light-emitting units 4 arranged in a matrix, and the light-emitting units 4 extend into the grooves 101.

[0030] In actual application of the above structure, the diffusion particle layer 2 is directly adhered to the transparent substrate 1 without any additional spacer layer or air gap, which reduces the scattering and reflection of light during propagation, and also reduces the space occupied inside the module, which helps to reduce the overall thickness of the module. At the same time, grooves 101 are designed on the side of the transparent substrate 1 close to the light board 3, and the light-emitting units 4 are extended into these grooves 101, which reduces the space occupied between the light-emitting units 4 and the transparent substrate 1. Compared with the traditional direct-type backlight module, this design avoids the situation where the light-emitting units 4 are outside the module or require additional space for assembly, further reducing the overall thickness of the module. The utility model reduces the space occupied by adhering the diffusion particle layer 2 to the transparent substrate, thereby reducing the thickness of the module. At the same time, grooves 101 are set on the side of the transparent substrate 1 close to the light board, and the light-emitting units 4 are extended into these grooves 101, further reducing the overall thickness of the backlight module, making the display device lighter and thinner.

[0031] Specifically, the shape of the groove 101 is either circular or square. Setting the groove 101 to a regular shape, such as a circular or square shape, ensures the stable position of the light-emitting unit 4 within the groove 101 while reducing light scattering at the edges of the groove 101, achieving more uniform backlight distribution and improving display clarity. Specifically, the circular groove 101 ensures more uniform diffusion of light emitted by the light-emitting unit 4 as it passes through the transparent substrate 1. The inherent symmetry of the circular structure helps evenly distribute light in all directions, reducing the occurrence of hot spots and dark areas. The square groove 101 allows for more precise control of the light propagation path. Because the square structure has clear boundaries, it is easier to guide and confine light in specific directions, reducing light crosstalk. Both circular and square grooves 101 have their own unique benefits. The circular groove 101 focuses more on uniform light diffusion and reducing stress concentration, while the square groove 101 focuses more on precise light control and improving module structural stability. In actual applications, the most appropriate groove 101 shape can be selected based on specific needs and module design.

[0032] Specifically, the thickness of the diffusion particle layer 2 is 0.1mm to 2mm. The main function of the diffusion particle layer 2 is to scatter light, distributing it more evenly on the screen. When the thickness of the diffusion particle layer 2 is within the range of 0.1mm to 2mm, light passing through this layer can be effectively and evenly scattered, avoiding bright spots and dark areas on the screen, thereby improving the uniformity and clarity of the picture. The thickness of the diffusion particle layer 2 also affects the transmittance of light. If the thickness is too large, some light may be absorbed or reflected, reducing the utilization rate of light. However, a thickness range of 0.1mm to 2mm ensures that light maintains a high transmittance when passing through this layer, thereby ensuring sufficient backlight intensity.

[0033] It should be noted that the transparent substrate 1 is selected from glass, polycarbonate, polyethylene terephthalate, polyimide, or polymethyl methacrylate. Glass, polycarbonate, polyethylene terephthalate, polyimide, and polymethyl methacrylate all have excellent light transmittance, which can ensure that light is minimally lost when passing through the transparent substrate. High light transmittance helps to increase the brightness of the screen, making the display brighter and clearer. Among them, plastic materials such as polycarbonate, polyethylene terephthalate, polyimide and polymethyl methacrylate have the characteristics of lighter weight and easier to achieve thinness compared to glass. Choosing polycarbonate, polyethylene terephthalate, polyimide or polymethyl methacrylate as the transparent substrate 1 can help to further reduce the overall weight and thickness of the display device, and improve portability and aesthetics.

[0034] Furthermore, the present invention includes an isolation portion 5 arranged in a grid pattern within the transparent substrate 1, dividing the transparent substrate 1 into a plurality of regions 102. Each region 102 has a corresponding groove 101. The grid-like design of the isolation portion 5 divides the transparent substrate 1 into a plurality of regions 102. Each region 102 corresponds to a groove 101, which is used to accommodate the light-emitting units 4. This design ensures uniform distribution of the light-emitting units 4 within the module, while reducing crosstalk between different regions 102 and improving the display quality.

[0035] It should be noted that the isolation part can be selectively made into a square or conical shape. The design of the square isolation part is relatively simple, easy to manufacture and process, which helps to reduce production costs and improve production efficiency. The conical isolation part can more effectively guide light so that it can be more evenly distributed inside the module. By adjusting the angle and height of the cone, the propagation path and diffusion range of the light can be controlled, thereby reducing the occurrence of light hotspots and dark areas. In general, for backlight modules that need to be easy to manufacture and process, square isolation parts are a better choice, which can reduce production costs and improve production efficiency. For backlight modules that need to optimize light distribution and improve light utilization, conical isolation parts are a better choice. They can guide light to achieve a more even distribution and improve the clarity and brightness of the display.

[0036] Specifically, when in use, it is necessary to design each area 102 to be the same size. Since the light from each light-emitting unit 4 is confined to the corresponding area 102, and the areas 102 are the same size, the backlight module can produce a more uniform backlight, which helps to improve the visual effect and image quality of the display.

[0037] In this embodiment, the thickness of the isolating portion 5 is 0.01 mm to 0.2 mm. It should be noted that setting the isolating portion 5 to a uniform thickness facilitates mass production and standardized management, reducing production costs and cycle times. The thickness of the isolating portion 5 is within the range of 0.01 mm to 0.2 mm, ensuring that light passing through the isolating portion 5 does not suffer excessive loss or scattering due to excessive thickness. This helps improve light utilization, allowing more light to reach the display area, and enhancing the brightness and clarity of the displayed image.

[0038] Furthermore, a reflective film is provided on the surface of the isolation portion 5 facing the area 102. The provision of the reflective film can reflect some of the light that may have been scattered or escaped, and redirect these lights back to the predetermined light path. This helps to improve the utilization rate of light, reduce light loss, and thus enhance the overall brightness of the backlight module. The reflective film not only reflects light, but also blocks light from adjacent light-emitting units 4 to a certain extent. This helps to further reduce light crosstalk and improve the contrast and clarity of the display image. Improving light utilization and reducing light crosstalk both help to reduce the light-emitting unit power required by the backlight module. This means that while maintaining the same brightness or higher brightness, energy consumption can be reduced and the energy efficiency of the module can be improved.

[0039] It should be noted that the isolation portion 5 is made of a light-shielding material. The isolation portion 5, made of light-shielding material, separates the transparent substrate 1 into several independent regions 102, each region 102 corresponding to a corresponding light-emitting unit 4. When the light-emitting unit 4 is operating, the light generated by it is confined to the corresponding region 102, reducing crosstalk between different regions 102. Because the light from each light-emitting unit 4 is confined to its corresponding region 102 and the regions 102 are separated by the light-shielding material, the backlight module can produce a more uniform backlight. This helps improve the visual quality of the display and reduce visual fatigue. At the same time, the light-shielding material can effectively absorb or block light from adjacent light-emitting units 4, thereby reducing interference from background light. This helps improve the contrast of the display and make the image clearer and sharper. In this embodiment, the isolation portion 5 is made of metal. The metal isolation portion 5 effectively blocks light and prevents crosstalk between different light-emitting units 4. Due to the high density and reflectivity of metal, it absorbs or reflects most of the light, ensuring that the light from each light-emitting unit 4 is confined to its corresponding region.

[0040] It should be noted that the transparent substrate 1 and the isolation portion 5 of this embodiment are respectively made of glass and metal, and the isolation portion 5 and the transparent substrate 1 are integrally formed with the transparent substrate 1 through processes such as casting and melting.

[0041] In the description of the present invention, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships 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.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0043] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0044] Although the present invention has been described with reference to the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and variations based on the above content. Therefore, all such substitutions, modifications and variations are included within the spirit and scope of the appended claims.

Claims

1. An ultra-thin direct-lit backlight module, characterized in that: The invention comprises a transparent substrate, a diffusion particle layer, and a light board arranged below the transparent substrate. The diffusion particle layer is attached to the side of the transparent substrate away from the light board. A plurality of grooves are provided on the side of the transparent substrate close to the light board. The light board comprises a plurality of light-emitting units arranged in a matrix, and the light-emitting units extend into the grooves.

2. The ultra-thin direct-lit backlight module according to claim 1, wherein: The thickness of the diffusion particle layer is 0.1mm to 2mm.

3. The ultra-thin direct-lit backlight module according to claim 1, wherein: The transparent substrate is selected from glass, polycarbonate, polyethylene terephthalate, polyimide, or polymethyl methacrylate.

4. The ultra-thin direct-lit backlight module according to claim 1, wherein: It also includes an isolation part, which is arranged in the transparent substrate in a grid shape to divide the transparent substrate into a plurality of areas, and each area is correspondingly provided with one of the grooves.

5. The ultra-thin direct-lit backlight module according to claim 4, wherein: The areas are of the same size.

6. The ultra-thin direct-lit backlight module according to claim 4, wherein: The thickness of the isolation portion is 0.01mm to 0.2mm.

7. The ultra-thin direct-lit backlight module according to claim 4, wherein: A reflective film is provided on a surface of the partition facing the region.

8. The ultra-thin direct-lit backlight module according to claim 4, wherein: The isolation portion is made of a light-shielding material.

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