Backlight module, display device and electronic product

Abstract

The utility model discloses a backlight unit, display device and electronic product relates to display technical field, wherein, the backlight unit, include: backboard, light source is located the backboard for and is used for emitting light, reflection subassembly includes reflection coating and lens layer, reflection coating is sprayed in the backboard, the lens layer is located the reflection coating side away from the backboard, and the lens layer is equipped with a plurality of through -hole. The utility model discloses a display device and electronic product.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to a backlight module, display device and electronic product. Background Technology

[0002] Traditional backplate structures only need to meet mechanical support and heat dissipation requirements. Their substrate materials are mainly aluminum alloy, stainless steel, and pure aluminum, etc. The main drawback is that their native reflectivity is only 60%-70%, so an additional reflective film needs to be applied during the overall design. For existing direct-lit backlight models, especially with extreme cost constraints, fewer LED strips, and numerous backplate ribs, the design of the reflective sheet is particularly important. However, the reflective sheet material has weak rigidity and poor toughness, which can easily lead to localized bulging and unevenness during assembly, resulting in significant light loss and consequently, poor image quality such as localized shadows and uneven brightness. Furthermore, the attached reflective sheet also restricts LED heat dissipation. Utility Model Content

[0003] The main purpose of this utility model is to provide a backlight module that solves the technical problem that the application of reflective sheets to the backplate in current backlight modules easily leads to poor quality.

[0004] To achieve the above objectives, this utility model proposes a backlight module, comprising: Back panel; A light source, disposed on the back plate, is used to emit light; and A reflective assembly includes a reflective coating and a lens layer. The reflective coating is sprayed onto the back plate, and the lens layer is disposed on the side of the reflective coating away from the back plate, and the lens layer has a plurality of through holes.

[0005] This utility model also proposes a display device, including the backlight module as described above.

[0006] This utility model also proposes an electronic product, including the display device as described above. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0008] Figure 1 A cross-sectional structural schematic diagram of an embodiment of the backlight module provided by this utility model; Figure 2This is a structural schematic diagram of an embodiment of the backlight module provided by this utility model.

[0009] Explanation of icon numbers: 100. Back panel; 110. Anchor pattern layer; 200, Reflective component; 210, Silicon dioxide layer; 220, Titanium dioxide layer; 300, Lens layer; 310, Through hole.

[0010] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0012] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0013] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0014] In existing technologies, reflective sheet materials have weak rigidity and poor toughness, which can easily lead to local bulging and unevenness during assembly, resulting in significant light loss and poor image quality such as local shadows and uneven brightness in the overall picture. Furthermore, the attached reflective sheet also restricts LED heat dissipation to a certain extent.

[0015] This utility model proposes a backlight module.

[0016] Please see Figure 1 and Figure 2 In one embodiment of the present invention, the backlight module includes: a back plate 100, a light source, and a reflective component 200. The light source is disposed on the back plate 100 and is used to emit light. The reflective component 200 includes a reflective coating and a lens layer 300. The reflective coating is sprayed on the back plate 100, and the lens layer 300 is disposed on the side of the reflective coating away from the back plate 100. The lens layer 300 is provided with a plurality of through holes 310.

[0017] In the specific implementation process, the backplate 100 is made of aluminum alloy, stainless steel, or pure aluminum. It should be noted that the surface of the backplate 100 is also galvanized. A special coating is directly applied to the backplate 100 to replace the reflective sheet for reflecting light. A light source is fixed on the backplate 100 to emit light, and the reflective component 200 is used to reflect the light. Specifically, a reflective coating is sprayed onto the side of the backplate 100 where the light source is mounted. This can be achieved using existing ordinary spraying technology, and the process is simple. Then, a lens layer 300 is fixed on the reflective coating. The lens layer 300 is transparent and used to reflect light. The lens layer 300 further reflects light of a specific wavelength, improving the reflection effect. In addition, the reflective coating also enhances light scattering, improving the uniform light effect.

[0018] In one embodiment, the back panel 100 is provided with an anchor pattern layer 110, and the reflective coating is sprayed onto the side of the anchor pattern layer 110 facing away from the back panel 100. Specifically, when spraying the reflective coating onto the back panel 100, the back panel 100 is first pretreated, specifically by sandblasting to roughen it, thereby forming the anchor pattern layer 110 on the back panel 100 to improve the adhesion of the reflective coating. Furthermore, after the roughening treatment, ultrasonic cleaning is performed to remove dust and oil, ensuring the spraying quality of the reflective coating and thus improving the reflective effect.

[0019] This invention employs a reflective coating sprayed onto a backplate 100, replacing the reflective sheet assembly in the backlight module to enhance light reflection. Furthermore, a lens layer 300 is placed on the coating to further reflect light, and several through holes 310 are formed in the lens layer 300 to improve light utilization. Compared to existing technologies, this invention, by spraying a reflective coating onto the backplate 100 and providing a lens layer 300 with several through holes 310, eliminates the need for nanomaterials or precise photolithography equipment, making it highly feasible. It solves a series of defects caused by the current reflective sheet attachment process, improves production efficiency, ensures quality, and simplifies the production process in the display industry.

[0020] In one embodiment, the reflective coating includes a silicon dioxide layer 210 and a titanium dioxide layer 220, with the silicon dioxide layer 210 sprayed onto the back panel 100 and the titanium dioxide layer 220 sprayed onto the silicon dioxide layer 210.

[0021] In practice, the reflective coating consists of two layers, forming a highly porosity reflective layer. This results in numerous tiny pores, voids, or channels within the coating. These pores can be nanometer-, micrometer-, or even larger, distributed like a sponge throughout the overall structure of the coating. On one hand, the air within these pores is a poor conductor of heat. Therefore, the highly porosity of the coating effectively blocks high temperatures, protecting the underlying metal components. On the other hand, the porous surface of the coating provides a larger specific surface area and mechanical interlocking effect for the adhesion of subsequent coatings, resulting in a more robust bonding of the coating system.

[0022] In this embodiment, a silica coating is sprayed onto the backplate 100, and then a titanium dioxide layer 220 is sprayed onto the silica coating. When light shines on the outermost titanium dioxide surface, part of the light is directly reflected, while the other part penetrates the titanium dioxide layer 220 and reaches the interface between titanium dioxide and silica. Here, some of the light is reflected back and passes through the titanium dioxide layer 220 again to achieve extremely high reflectivity. In specific implementation, the thickness of the titanium dioxide layer 220 is 10µm-50µm to match the target wavelength of the light and further improve reflectivity.

[0023] refer to Figure 2 As shown, in one embodiment, the through-hole 310 is a hexagonal hole, which improves the utilization rate of light. Further, a plurality of through-holes 310 are configured as a honeycomb array.

[0024] In practice, the lens array disperses and mixes the light, effectively eliminating color unevenness or brightness stripes that may be caused by interference effects. It also eliminates focal points in the light source, resulting in a very uniform and soft light spot on the emitting surface. The honeycomb array lens layer 300, through mixing and collimating the light, can significantly weaken or average the iridescent effect. The final emitted light is a mixture of light from thousands of tiny lens units, resulting in a more stable and consistent overall color and brightness. Because the light is collimated, stray light is reduced, making the light more directional, improving contrast and color saturation, and allowing for the display of purer, more saturated colors in the display system.

[0025] In one embodiment, the lens layer 300 is hot-pressed to the reflective coating, eliminating the need for additional complex processes and replacing traditional adhesive-type reflective sheets. Specifically, the backplate 100 is heated, then the lens layer 300 is covered, and finally, a roller is used for pressure reinforcement, improving production efficiency, ensuring quality, and simplifying the production process in the display industry.

[0026] In one embodiment, the lens layer 300 is made of PMMA material, which ensures that the lens layer 300 has high light transmittance while also ensuring that the lens layer 300 is fixed to the emissive coating by hot pressing.

[0027] This utility model also proposes a display device, which includes a backlight module. The specific structure of the backlight module is as described in the above embodiments. Since this display device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0028] This utility model also proposes an electronic product, which includes a display device. The specific structure of the display device is as described in the above embodiments. Since this electronic product adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0029] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the inventive concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.

Claims

1. A backlight module, characterized in that, include: Back panel; A light source is disposed on the back plate and is used to emit light; as well as A reflective assembly includes a reflective coating and a lens layer. The reflective coating is sprayed onto the back plate, and the lens layer is disposed on the side of the reflective coating away from the back plate, and the lens layer has a plurality of through holes.

2. The backlight module as described in claim 1, characterized in that, The reflective coating includes a silicon dioxide layer and a titanium dioxide layer, wherein the silicon dioxide layer is sprayed onto the back panel and the titanium dioxide layer is sprayed onto the silicon dioxide layer.

3. The backlight module as described in claim 2, characterized in that, The thickness of the titanium dioxide layer is 10um-50um.

4. The backlight module as described in claim 1, characterized in that, The through hole is a hexagonal hole.

5. The backlight module as described in claim 1, characterized in that, Some of the through holes are configured as a honeycomb array of holes.

6. The backlight module as described in claim 1, characterized in that, The lens layer is made of PMMA material.

7. The backlight module as described in claim 1, characterized in that, The lens layer is hot-pressed to the reflective coating.

8. The backlight module as described in claim 1, characterized in that, The back panel has an anchor pattern layer, and the reflective coating is sprayed on the side of the anchor pattern layer that is away from the back panel.

9. A display device, characterized in that, Includes the backlight module as described in any one of claims 1-8.

10. An electronic product, characterized in that, Includes the display device as described in claim 9.

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