Reflective structure, backlight module and display device

Abstract

Provided in the embodiments of the present application are a reflective structure, a backlight module and a display device. The backlight module comprises a light source module, and the light source module comprises a plurality of light sources. The reflective structure is integrally formed from a reflective material and comprises a plurality of light-reflecting recesses distributed in an array, wherein each light-reflecting recess is adapted to accommodate at least one light source. In the present application, the light-reflecting recesses can converge the light of the light sources in the areas thereof, thereby avoiding significant diffusion of light halos, and reducing the impact of light between the areas.

Description

Reflective structure, backlight module and display device

[0001] This application claims priority to Chinese Patent Application No. 202423047956.5, filed on December 10, 2024, entitled “Reflective Structure, Backlight Module and Display Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application belongs to the field of display technology, and in particular relates to a reflective structure, a backlight module, and a display device. Background Technology

[0003] The backlight module is one of the key components of the display panel, used to illuminate the display panel so that it can display images normally.

[0004] One type of direct-lit backlight module in related technologies includes a lamp board, light-emitting devices, a diffuser plate, and a reflector. The light-emitting devices are mounted on the lamp board and positioned below the diffuser plate. The reflector plate is positioned below the light-emitting devices. The light emitted by the light-emitting devices is reflected by the reflector plate and emitted through the diffuser plate. Direct-lit backlight modules have the advantage of high brightness. However, this structure suffers from significant LED halo diffusion and easy interference between light sources in different areas.

[0005] Therefore, the technology still needs to be improved and enhanced. Technical issues

[0006] Direct-lit backlight modules suffer from significant LED halo diffusion and easy interference between different areas of light. Technical solutions

[0007] This application provides a reflective structure, a backlight module, and a display device, which can effectively solve the problems of significant LED halo diffusion in direct-lit backlight modules and easy mutual interference of light between different areas.

[0008] In a first aspect, embodiments of this application provide a reflective structure applied to a backlight module, the backlight module including a light source module, the light source module including multiple light sources, the reflective structure being integrally formed from a reflective material, including multiple reflective grooves arranged in an array, each of the reflective grooves being adapted to accommodate at least one of the light sources.

[0009] Secondly, embodiments of this application also provide a backlight module, including:

[0010] The light source module includes multiple light sources;

[0011] In the aforementioned reflective structure, a ridge is formed between each pair of adjacent reflective grooves;

[0012] A diffuser plate includes an incident light surface and a plurality of receiving grooves formed recessed from the incident light surface toward its interior, each of the ridges being inserted into one of the receiving grooves.

[0013] Thirdly, embodiments of this application also provide a display device, including the backlight module or the reflective structure described above. Beneficial effects

[0014] The reflective structure, backlight module, and display device of this application embodiment utilize a reflective material integrally molded to form multiple reflective grooves. By placing the light source in the reflective grooves and reflecting the light emitted by the light source, the light can be focused into the area where the light source is located, avoiding significant diffusion of the halo and reducing the light interference between different areas. In addition, the backlight module of this application has a receiving groove on the diffuser plate, and the ridge formed by folding the reflective structure is inserted into the receiving groove, so that the reflective structure and the diffuser plate are fitted together. Thus, the backlight module can further reduce the overall thickness while ensuring the light emission effect, resulting in a compact structure that conforms to the current trend of thinner and lighter electronic products. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments 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 only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.

[0017] Figure 1 is a schematic diagram of the reflective structure provided in an embodiment of this application.

[0018] Figure 2 is a schematic diagram of another structure of the reflection structure provided in the embodiment of this application.

[0019] Figure 3 is a schematic diagram of the backlight module provided in the embodiment of this application.

[0020] Figure 4 is an exploded view of the backlight module shown in Figure 3.

[0021] Figure 5 is a cross-sectional view of the backlight module shown in Figure 3 along the AA direction.

[0022] Figure 6 is a schematic diagram of the structure of the diffuser plate provided in the embodiment of this application.

[0023] Figure 7 is a schematic diagram of another structure of the diffusion plate provided in the embodiment of this application.

[0024] Implementation methods of this application

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0026] This application provides a reflective structure applied to a backlight module. For example, please refer to Figure 1, which is a schematic diagram of the reflective structure provided in this application embodiment. The backlight module includes a light source module, which includes multiple light sources. The reflective structure 100 is integrally formed from a reflective material and includes multiple reflective grooves 110 arranged in an array, each reflective groove 110 being adapted to accommodate at least one light source.

[0027] In this embodiment, the light source emits light, and the inner wall of the reflective groove 110 reflects the light emitted by the light source. Optionally, as shown in Figure 1, each reflective groove 110 accommodates a corresponding light source, and multiple reflective grooves are arranged in a matrix, with each reflective groove 110 providing an independent light-emitting cavity for a light source. In other embodiments, please refer to Figure 2, which is another structural schematic diagram of the reflective structure provided in the embodiments of this application. Each reflective groove 110 is an elongated reflective groove, and multiple reflective grooves 110 are distributed in a linear array, that is, multiple elongated reflective grooves 110 extend longitudinally and are arranged sequentially along the transverse direction. Each reflective groove 110 accommodates multiple light sources, and the multiple light sources in each reflective groove 110 are adapted to be arranged sequentially at intervals along the longitudinal direction of the reflective groove 110.

[0028] Regarding the material of the reflective structure 100, the reflective material can be reflective paper. For example, the reflective structure 100 can be integrally formed from a reflective paper sheet using a vacuum forming process. In some other embodiments, the reflective material can also be a reflective coating or a reflective plating, which may contain substances with reflective properties such as aluminum, silver, or optical-grade polymers.

[0029] Optionally, the reflector groove 110 is a conical groove, such as a square pyramidal groove or a conical groove. This helps the reflector groove to focus light into the central area, improve light utilization, and enhance light distribution.

[0030] The reflective structure 100 provided in this application embodiment uses reflective material to integrally form multiple reflective grooves 110. By placing the light source in the reflective grooves, the reflective grooves 110 reflect the light emitted by the light source, which can concentrate the light emitted by the light source in this area, avoid significant diffusion of halo, reduce the light influence between different areas, thereby improving the utilization rate of light, and help improve the distribution of light on the light guide plate or diffuser plate, so that the light is evenly dispersed to the entire backlight area, which can reduce the occurrence of dark and bright areas, and improve the uniformity of backlight and overall brightness.

[0031] This application also provides a backlight module. For example, please refer to Figures 3-5. Figure 3 is a structural schematic diagram of the backlight module provided in this application embodiment, Figure 4 is an exploded view of the backlight module shown in Figure 3, and Figure 5 is a cross-sectional view of the backlight module shown in Figure 3 along the AA direction. The backlight module 10 includes the above-mentioned reflective structure 100, light source module 200, and diffuser plate 300.

[0032] The light source module 200 includes multiple light sources 210; in the reflective structure 100, a ridge 120 is formed between every two adjacent reflective grooves 110, and each reflective groove 110 accommodates at least one light source 210; the diffuser plate 300 includes a light-incident surface 310 and multiple receiving grooves 320 formed by recesses from the light-incident surface 310 toward its interior, with each ridge 120 inserted into a receiving groove 320. The light source 210 emits light, the surface of the reflective groove 110 has the characteristic of reflecting light, and the diffuser plate 300 diffuses the light. After the light emitted by the light source 210 is gathered by the reflective groove 110, the light utilization rate can be improved, and the light distribution on the diffuser plate 300 can be improved, avoiding the problem of bright spots caused by light concentrating directly above the light source 210, thereby improving the uniformity of light output from the backlight module. The diffuser plate 300 is used to diffuse light. The light emitted by the light source 210 and the light reflected by the reflector groove 110 pass through the diffuser plate, which further improves the uniformity and softness of the light emitted by the backlight module.

[0033] It should be noted that the diffuser plate 300 needs to be spaced apart from the light source 210 to ensure that it does not cause contact friction to the light source 210. For example, the distance between the diffuser plate 300 and the light source 210 is more than 0.1 cm.

[0034] The light source 210 includes, for example, an LED chip and a lens. The LED chip, as the core of the light source module, is made of semiconductor material and emits light when powered on. The lens is used to improve the direction of light propagation. It should be noted that the light source module 200 typically also includes a lamp board for supporting the light source 210, a driver IC for the light source 210, heat sinks, and other devices. These devices can be disposed in the reflector groove 110 or outside the reflector groove 110.

[0035] The backlight module 10 provided in this application embodiment, by placing the light source in the reflective groove 110 and using the reflective groove 110 to reflect the light emitted by the light source, can concentrate the light emitted by the light source in this area, avoid significant diffusion of halo, reduce the light influence between different areas, thereby improving the light utilization rate, and helping to improve the light distribution on the diffuser plate, so that the light is evenly dispersed throughout the backlight area, which can reduce the occurrence of dark and bright areas, and improve the uniformity and overall brightness of the backlight. In addition, by opening a receiving groove 320 on the diffuser plate 300 and inserting the ridge 120 formed by the reflective structure 100 into the receiving groove 320, the reflective structure 100 and the diffuser plate 300 are fitted together. Compared with the existing backlight structure that directly stacks the flat diffuser plate on top of the reflective structure 100, the backlight module 10 of this application can further reduce the overall thickness while ensuring the light emission effect, and the structure is compact, which is in line with the current development trend of thinner and lighter electronic products.

[0036] In some embodiments, the light source module 200 further includes a lamp plate 220 and a plurality of driving devices 230 disposed above the lamp plate 220, each driving device 230 driving at least one light source 210; a reflective structure 100 is disposed above the lamp plate 220, and each ridge 120 and the lamp plate 220 surround to form a cavity 130, each cavity 130 accommodating at least one driving device 230.

[0037] The lamp board 220 is used to carry the light source 210. Multiple driving devices 230 and multiple light sources 210 can be electrically connected in a one-to-one correspondence, so that each driving device 230 drives a corresponding light source 210; alternatively, one driving device 230 can be electrically connected to several light sources 210, so that each driving device 230 drives several corresponding light sources 210. The specific implementation method can be determined by the designer according to the actual application scenario of the backlight module 10.

[0038] The lamp panel 220 is also used to support the driving device 230. By hiding the driving device 230 in the cavity 130 formed by the ridge 120 and the lamp panel 220, the driving device 230 can be isolated from the light source 210, thereby avoiding the influence of the presence of the driving device 230 on the light pattern emitted by the light source 210, thus ensuring the uniformity of the light emitted by the backlight module 10 and improving the visual effect of the product.

[0039] Optionally, each reflector groove 110 includes a bottom wall and circumferential side walls surrounding the bottom wall. A notch is provided in the bottom wall, through which the light source 210 passes and is connected to the lamp panel 220. This reduces the complexity of the backlight module 10 structure.

[0040] In some embodiments, the surface of the lamp panel 220 facing away from the light source 210 is also coated with a heat dissipation coating, and a heat dissipation groove can be formed on the side of the lamp panel 220 facing away from the light source 210 to improve the heat dissipation capacity of the light source module 200.

[0041] In some embodiments, please refer to FIG6, which is a schematic diagram of the structure of the diffuser plate provided in the embodiment of this application. The receiving groove 320 formed on the diffuser plate 300 is adapted to the shape of the ridge 120. For example, the receiving groove 320 is a conical groove such as a quadrangular pyramidal groove. To facilitate the insertion of the ridge 120 into the receiving groove 320, a guide slope can also be provided in the receiving groove 320.

[0042] To ensure the structural strength of the diffuser plate 300, the depth of the receiving groove 320 can be set to be less than or equal to 60% of the thickness of the diffuser plate 300. This ensures that the thickness at the bottom of the receiving groove 320 is acceptable, preventing the diffuser plate 300 from being easily damaged, and reducing the overall thickness of the backlight module 10 while maintaining its quality. For example, the thickness of the diffuser plate 300 is 2mm, and the depth of the receiving groove 320 is 0.5mm; or, the thickness of the diffuser plate 300 is 5mm, and the depth of the receiving groove 320 is 3mm.

[0043] In addition, to reduce the difficulty of assembling the diffuser plate 300 and the reflective structure 100 and improve assembly efficiency, an assembly gap can be provided between each ridge 120 and the inner wall of the corresponding receiving groove 320. This reduces the likelihood of situations where the ridge 120 is difficult to insert properly into the receiving groove 320 due to process limitations, thus preventing assembly difficulties between the diffuser plate 300 and the reflective structure 100.

[0044] In some embodiments, please refer to FIG7, which is a cross-sectional view of the diffuser plate provided in the embodiments of this application. The diffuser plate 300 further includes a light-emitting surface 330 and a plurality of light-blocking grooves 340 formed by recesses from the light-emitting surface 330 into it. Each light-blocking groove 340 is positioned opposite to and spaced apart from a receiving groove 320. The light-blocking grooves 340 are used to prevent light rays in adjacent reflective grooves 110 from crossing and propagating, thus avoiding mutual interference of light rays and resulting in poor light emission uniformity of the backlight module 10.

[0045] For a diffuser plate 300 with light-blocking grooves 340, preferably, the sum of the depth of each light-blocking groove 340 and the depth of its corresponding receiving groove 320 is less than or equal to 60% of the thickness of the diffuser plate 300. This ensures that the thickness at the bottom of the receiving groove 320 is acceptable, preventing the diffuser plate 300 from being easily damaged, and reducing the overall thickness of the backlight module 10 while maintaining the quality of the backlight module 10. For example, the thickness of the diffuser plate 300 is 2mm, and the sum of the depths of the receiving groove 320 and the light-blocking groove 340 is 1mm; or, the thickness of the diffuser plate 300 is 5mm, and the sum of the depths of the receiving groove 320 and the light-blocking groove 340 is 3mm.

[0046] To reduce light loss when passing through the diffuser plate 300 and improve the overall brightness of the backlight module 10, an anti-reflection film layer can be added to the light-emitting surface 330 and / or the light-incident surface 310 of the diffuser plate 300, for example. This improves the transmittance of the diffuser plate 300, reduces light scattering, increases light utilization, and thus enhances the overall light emission performance of the backlight module 10.

[0047] In some embodiments, the backlight module 10 further includes a plurality of adhesive members 400, each ridge 120 being adhered to the inner wall of the corresponding receiving groove 320 via at least one adhesive member 400. Optionally, the adhesive member 400 is double-sided adhesive, with its two adhesive surfaces adhering to both the ridge 120 and the inner wall of the receiving groove 320. Preferably, the adhesive member 400 is light-transmitting. The ridge 120 being adhered to the inner wall of the receiving groove 320 via the adhesive member 400 avoids excessive light obstruction, thereby maintaining the OD (Optical Density) of the backlight module 10.

[0048] In a preferred embodiment, the ridge 120 includes a top wall 121 away from the reflective groove 110, and the adhesive 400 is adhered to the top wall 121. It is understood that the reflective groove 110 is used to reflect light emitted from the light source 210 to improve the divergence of the emitted light and make the overall light emission uniform. If the adhesive 400 is adhered to the reflective groove 110, it will affect the reflection effect of the reflective groove 110, resulting in reduced light emission uniformity. If the adhesive 400 is adhered to the top wall 121, it is possible to avoid affecting the reflection effect of the reflective groove 110, thereby maintaining the OD of the backlight module 10.

[0049] To ensure the bonding strength between the ridge 120 and the inner wall of the receiving groove 320, the surfaces on the ridge 120 and / or the receiving groove 320 suitable for contact with the adhesive component 400 can be roughened. It should be noted that the adhesive component 400 is interference-fitted with the ridge 120 and the receiving groove 320, thus ensuring full contact with the surfaces of the ridge 120 and the receiving groove 320. When the bonding surfaces of the ridge 120 and / or the receiving groove 320 are roughened, the bonding area with the adhesive component 400 can be increased compared to a smooth surface, thereby improving the bonding strength. Preferably, the surfaces on the ridge 120 and the receiving groove 320 suitable for contact with the adhesive component 400 are both roughened. This improves the bonding strength between the ridge 120 and / or the receiving groove 320 and the adhesive component 400, thereby improving the structural strength of the assembly between the diffuser plate 300 and the reflective structure 100, and enhancing the quality of the backlight module 10.

[0050] The backlight module 10 provided in this application embodiment, by placing the light source in the reflective groove 110 and using the reflective groove 110 to reflect the light emitted by the light source, can concentrate the light emitted by the light source in this area, avoid significant diffusion of halo, reduce the light influence between different areas, thereby improving the light utilization rate, and helping to improve the light distribution on the diffuser plate, so that the light is evenly dispersed throughout the backlight area, reducing the occurrence of dark and bright areas, and improving the uniformity and overall brightness of the backlight. In addition, by opening a receiving groove 320 on the diffuser plate 300 and inserting the convex ridge 120 formed by folding the reflective structure 100 into the receiving groove 320, the reflective structure 100 and the diffuser plate 300 are fitted together. Compared with the existing backlight structure that directly stacks the flat diffuser plate on top of the reflective structure 100, the backlight module 10 of this application can further reduce the overall thickness while ensuring the light emission effect, making the structure compact and in line with the current development trend of thinner and lighter electronic products. This application also provides a display device, which includes the backlight module 10 or the reflective structure 100 in any of the above embodiments. Since the backlight module adopts some or all of the technical solutions of the foregoing embodiments, the display device has at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments, which will not be described in detail here.

[0051] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0052] In the description of this application, 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 technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0053] The optical system and projection device provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A reflective structure applied to a backlight module, the backlight module including a light source module, the light source module including multiple light sources, characterized in that, The reflective structure is integrally formed from reflective material and includes multiple reflective grooves arranged in an array, each of which is adapted to accommodate at least one of the light sources.

2. The reflective structure according to claim 1, characterized in that, The reflective material is reflective paper.

3. The reflective structure according to claim 1, characterized in that, The reflective groove is a conical groove.

4. The reflective structure according to any one of claims 1-3, characterized in that, The multiple reflective slots are arranged in a matrix, and each reflective slot contains a corresponding light source.

5. A backlight module, characterized in that, include: The light source module includes multiple light sources; The reflective structure as described in any one of claims 1-4, wherein a ridge is formed between each pair of adjacent reflective grooves; A diffuser plate includes an incident light surface and a plurality of receiving grooves formed recessed from the incident light surface toward its interior, each of the ridges being inserted into one of the receiving grooves.

6. The backlight module according to claim 5, characterized in that, The light source module also includes a lamp board and a plurality of driving devices disposed above the lamp board, each of the driving devices driving a plurality of the light sources; The reflective structure is disposed above the lamp panel, and each of the ridges and the lamp panel surrounds a cavity, each cavity accommodating a plurality of the driving devices.

7. The backlight module according to claim 6, characterized in that, Each of the reflective grooves includes a bottom wall and a circumferential side wall surrounding the bottom wall. A notch is provided in the bottom wall, through which the light source passes and is connected to the lamp panel.

8. The backlight module according to any one of claims 5-7, characterized in that, The diffuser plate also includes a light-emitting surface and a plurality of light-blocking grooves formed by recesses from the light-emitting surface therein, wherein each light-blocking groove is positioned opposite to and spaced apart from one of the receiving grooves.

9. The backlight module according to claim 8, characterized in that, The sum of the depth of each of the light-blocking grooves and the depth of the corresponding receiving groove is less than or equal to 60% of the thickness of the diffuser plate.

10. The backlight module according to any one of claims 5-7, characterized in that, The diffuser plate also includes a light-emitting surface, and the light-emitting surface and / or the light-incident surface are provided with an anti-reflection film layer.

11. The backlight module according to any one of claims 5-7, characterized in that, Each of the ridges has an assembly gap with the inner wall of the corresponding receiving groove.

12. The backlight module according to any one of claims 5-7, characterized in that, The backlight module also includes multiple adhesive pieces, and each of the ridges is attached to the inner wall of the corresponding receiving groove through a plurality of adhesive pieces.

13. The backlight module according to claim 12, characterized in that, The ridge includes a top wall away from the reflective groove, and the adhesive is attached to the top wall.

14. The backlight module according to claim 12, characterized in that, The ridge and / or the surface on the receiving groove suitable for adhering to the adhesive is a rough surface.

15. The backlight module according to claim 12, characterized in that, The adhesive is translucent.

16. The backlight module according to any one of claims 5-7, characterized in that, The depth of the receiving groove is less than or equal to 60% of the thickness of the diffuser plate.

17. The backlight module according to any one of claims 5-7, characterized in that, The receiving groove is a conical groove.

18. The backlight module according to any one of claims 5-7, characterized in that, The surface of the lamp panel facing away from the light source is coated with a heat dissipation coating; and / or a heat dissipation groove is provided on the side of the lamp panel facing away from the light source.

19. The backlight module according to any one of claims 5-7, characterized in that, The receiving groove fits the convex ridge in a conformal manner.

20. A display device, characterized in that, Includes the backlight module as described in any one of claims 5-19 or the reflective structure as described in any one of claims 1 to 4.

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