Reflector plate, backlight module and display device
By setting reflective sheet design with reflective protrusions and reflection grooves on the reflective side, the problem of uneven light distribution in the backlight module is solved, brightness uniformity and visual effect are improved, and production process is simplified and costs are reduced.
Patent Information
- Application Number
- CN202422310920.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-09-20
AI Technical Summary
In existing backlight modules, the complex distribution after light reflection leads to uneven brightness at the edge of the screen, resulting in brightness oversaturation or dark areas, affecting the visual effect.
The reflective sheet design is adopted, and reflective protrusions and reflection grooves are provided on the reflective side. The reflective protrusions are used to guide light scattering, and the reflection groove absorbs or scatters light and adjusts the brightness distribution.
The brightness of the dark area is improved, the dark frame phenomenon is reduced, and the brightness of the bright area is too high, and the overall brightness uniformity of the light output is simplified, and the production process is reduced and costs are reduced.
Smart Images
Figure CN223092259U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of display technologies, and particularly relates to a reflective sheet, a backlight module, and a display device. Background Art
[0002] In the current market, backlight technologies are widely used in display devices. The backlight module is divided into two designs, namely, edge-lit and direct-lit, according to different arrangements of backlight sources. The reflective sheet is a key component in both edge-lit backlight modules and direct-lit backlight modules. It is mainly used to guide and reflect the light released by the backlight source in the direction perpendicular to the screen, so as to enhance the overall brightness of the screen and ensure the clarity and vividness of the visual experience.
[0003] However, in the actual application process, the distribution trend of the reflected light is complex and changeable. This characteristic not only causes the problem of "oversaturation of brightness" in some areas at the edge of the screen due to excessive light convergence to form bright areas, but also causes dark areas in some areas at the edge of the screen due to insufficient light coverage, resulting in uneven brightness distribution at the edge of the screen, forming an obvious brightness difference band, and further making the overall light output brightness not reach the ideal state. Summary of the Utility Model
[0004] The embodiments of the present application provide a reflective sheet, a backlight module, and a display device, which can adjust the light reflection effect of the reflective sheet, reduce the brightness difference between the bright and dark areas at the edge, and make the overall light output brightness more uniform.
[0005] In a first aspect, the embodiments of the present application provide a reflective sheet applied to a backlight module. The backlight module includes a plurality of light-emitting elements. The reflective sheet includes:
[0006] A reflective bottom plate having a reflective bottom surface and a plurality of mounting through holes penetrating the reflective bottom surface. One of the mounting through holes is for a light-emitting element to pass through; and
[0007] A plurality of reflective side plates sequentially connected along the periphery of the reflective bottom plate, and the reflective side plates are arranged at an angle with the reflective bottom plate and extend in a direction away from the reflective bottom plate;
[0008] Wherein, the reflective side plate includes a reflective side surface adjacent to the reflective bottom surface. The reflective side surface is provided with a plurality of reflective protrusions and a plurality of reflective grooves, and the plurality of reflective protrusions and the plurality of reflective grooves are arranged at intervals along the length direction of the reflective side plate, where the length direction is the adjacent direction of the reflective side plate and the reflective bottom surface.
[0009] In some embodiments, the outer surface of the reflective protrusion is arranged in an arc shape;
[0010] And / or, in a direction perpendicular to the reflection side surface, the height of the reflection protrusion is H, where H is not less than 2 mm and not greater than 10 mm.
[0011] In some embodiments, the reflection protrusion includes a plurality of first protrusion parts and a plurality of second protrusion parts. In the length direction of the reflection side plate, the plurality of first protrusion parts are respectively located at two ends of the reflection side plate close to the other reflection side plate, and the plurality of second protrusion parts are arranged between the first protrusion parts at both ends of the reflection side plate;
[0012] The volume size of the first protrusion part is larger than that of the second protrusion part.
[0013] In some embodiments, in a direction perpendicular to the reflection side surface, the groove wall of the reflection groove includes a connected reflection plane and a reflection arc surface, and the reflection plane is arranged farther from the reflection bottom plate than the reflection arc surface.
[0014] In some embodiments, in a direction perpendicular to the reflection side surface, the depth range of the reflection groove is D, where D is not less than 2 mm and not greater than 8 mm.
[0015] In some embodiments, in the length direction of the reflection side plate, the reflection protrusions and the reflection grooves are alternately arranged;
[0016] Wherein, the plurality of mounting through holes are arranged in an array. The opposite ends of the mounting through holes in the same column are respectively arranged opposite to a reflection groove, the opposite ends of the mounting through holes in the same row are respectively arranged opposite to a reflection groove, and a reflection protrusion is located between the mounting through holes in adjacent two rows or adjacent two columns.
[0017] In some embodiments, in the thickness direction of the reflection bottom plate, the lower edges of the plurality of reflection protrusions and the lower edges of the openings of the plurality of reflection grooves are at the same height.
[0018] In some embodiments, the reflection grooves and the reflection protrusions are formed by stamping the reflection side plate.
[0019] In a second aspect, an embodiment of the present application provides a backlight module, and the backlight module includes a back plate;
[0020] A plurality of light-emitting components, and the plurality of light-emitting components are arranged on the back plate; and
[0021] The reflection sheet as described above, the reflection sheet is arranged on the back plate, and a light-emitting component passes through a mounting through hole.
[0022] In a third aspect, an embodiment of the present application provides a display device, and the display device includes the backlight module as described above.
[0023] Based on the reflective sheet, the backlight module and the display device of the present application, reflection protrusions and reflection grooves are provided at intervals on the reflection side surface along the adjacent direction of the reflection side plate and the reflection bottom surface. In this way, when the light of the light-emitting element shines on the reflection side surface, on the one hand, when it shines on the reflection protrusions, it can guide the light to scatter in the light-emitting direction, so as to shorten the propagation distance of the light from the backlight source to the screen surface, thereby effectively improving the brightness of the dark area, reducing the dark frame phenomenon, and making the details of the dark part of the picture clearer and distinguishable. On the other hand, when the light shines into the reflection groove, the light will be absorbed or scattered, so as to increase the propagation path of the light. In this way, the direct reflection of the light on the reflection side plate is reduced, thereby effectively curbing the problem of excessive brightness caused by excessive light convergence, and effectively reducing the brightness of the bright area. In this way, by simultaneously setting the reflection protrusions and the reflection grooves to reduce the difference in brightness at the edge of the screen, the overall light-emitting brightness is made more uniform. At the same time, the silk-screen printing and punching steps in the traditional dimming process are avoided, the production process is simplified, the production complexity and cost are reduced, and higher production efficiency and lower manufacturing cost are achieved. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] 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 of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.
[0025] Figure 1 is a schematic structural diagram of an embodiment of the reflective sheet of the present application;
[0026] Figure 2 is Figure 1 a partial enlarged view of part A in
[0027] Figure 3 is a partially enlarged sectional view of an embodiment of the reflective sheet of the present application;
[0028] Figure 4 is a partially enlarged sectional view of another perspective of the reflective sheet of the present application.
[0029] Explanation of the reference numerals in the drawings:
[0030] 100. Reflective sheet; 10. Reflective bottom plate; 10a. Reflective bottom surface; 11. Mounting through hole; 20. Reflective side plate; 21. Reflective side surface; 211. Reflective protrusion; 2111. First protrusion part; 2112. Second protrusion part; 212. Reflective groove; 2121. Reflective plane; 2122. Reflective arc surface; 30. Edge part.
[0031] The realization of the purpose of this application, functional features and advantages will be further described in conjunction with the embodiments with reference to the accompanying drawings. Detailed implementation manners
[0032] To make the purpose, technical solutions and advantages of this application clearer, the following will further describe the embodiments of this application in detail with reference to the accompanying drawings.
[0033] When the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with this application. On the contrary, they are only examples of devices and methods that are consistent with some aspects of this application as detailed in the appended claims.
[0034] In the description of this application, it should be understood that terms such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations. In addition, in the description of this application, unless otherwise stated, "a plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the front and rear associated objects.
[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the art belonging to the technical field of this application. The terms used in the description of this specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.
[0036] Display devices (such as intelligent interactive tablets, etc.) generally include a display panel (liquid crystal panel) and a backlight module. According to different arrangements of the backlight source, the backlight module is divided into two designs: side-in type and direct-lit type. The reflective sheet is a key component of both the side-in type backlight module and the direct-lit type backlight module and is crucial for the processing of light.
[0037] In the related art, the main function of the reflective sheet is to guide and reflect the light released by the backlight source in the direction perpendicular to the display panel, so as to improve the utilization rate of light and enhance the brightness of the display panel. However, in practice, due to the complexity of the distribution of the reflected light, there will be a phenomenon that some areas of the display panel have excessive brightness due to the concentration of light, that is, the so-called "over-brightness phenomenon", and at the same time, a shadow will be formed in the area where the light coverage is insufficient, resulting in uneven brightness distribution of the display panel, specifically manifested as over-brightness at the edges (bright edges or bright packages) and reduced brightness in the border area (dark frames), and the overall light output effect fails to reach the ideal state.
[0038] To solve the above problems, please refer to Figures 1 to 3 , a first aspect of the present application proposes a reflective sheet 100, which can be applied to the backlight module. The backlight module includes a plurality of light-emitting elements. The reflective sheet 100 reflects the light of the backlight source to improve the utilization efficiency of light. In the embodiment of the present application, the reflective sheet 100 includes a reflective bottom plate 10 and a plurality of reflective side plates 20.
[0039] Among them, in the related art, the outer contour of the backlight module is designed as a rectangle or a square. In some embodiments, the reflective bottom plate 10 can also be set as a rectangle or a square to ensure the stability of the overall structure. The reflective bottom plate 10 can be an aluminum plate or a stainless steel plate. In this way, not only does the reflective bottom plate 10 have a high reflectivity, but also has a high strength, which can significantly enhance the durability of the reflective bottom plate 10, thereby extending the overall service life of the product. At the same time, the reflective bottom plate 10 has a reflective bottom surface 10a and a plurality of mounting through holes 11 penetrating through the reflective bottom surface 10a. One mounting through hole 11 is used for the light-emitting element to pass through. The mounting through hole 11 can be a round hole or a square hole, and the plurality of mounting through holes 11 can be arranged in an array to ensure that the light can present a more uniform and soft effect when exiting, improving the visual effect. The reflective bottom surface 10a can reflect the light emitted by the light-emitting element and project the reflected light, enabling some of the exposed light to be reused, which is beneficial to improving the utilization efficiency of light and enhancing the brightness of the entire backlight module.
[0040] The plurality of reflective side plates 20 are sequentially connected along the periphery of the reflective bottom plate 10, and the reflective side plates 20 are arranged at an angle with the reflective bottom plate 10 and extend in a direction away from the reflective bottom plate 10. Among them, the reflective side plates 20 are provided on the periphery of the reflective bottom plate 10 and are bent relative to the reflective bottom plate 10 to form a structure with the head and tail connected, avoiding local openings at the periphery from affecting the reflection effect of the reflective sheet 100 on light. The present application does not limit the specific angle between the reflective side plates 20 and the reflective bottom plate 10, as long as different installation requirements can be met.
[0041] In some embodiments, the reflective side plate 20 and the reflective bottom plate 10 may be integrally formed structures. This can not only avoid forming excessive seams that affect the reflection and light output effects, but also be relatively easy to manufacture. In addition, the reflective sheet 100 further includes an edge portion 30 that is connected to and integrally formed with the reflective side plate 20. The edge portion 30 is used to support and stably lap the edges of the peripheral components of the backplane module.
[0042] The reflective side plate 20 includes a reflective side surface 21 adjacent to the reflective bottom surface 10a. The reflective side surface 21 is used to reflect the light emitted by the light-emitting component and project the reflected light, so that part of the exposed light can be reused, which is beneficial to improving the light utilization efficiency and enhancing the brightness of the entire backlight module.
[0043] The reflective side surface 21 is provided with a plurality of reflective protrusions 211 and a plurality of reflective grooves 212. The plurality of reflective protrusions 211 and the plurality of reflective grooves 212 are arranged at intervals along the length direction of the reflective side plate 20, as Figure 1 shown, where the length direction is the adjacent direction of the reflective side plate 20 and the reflective bottom surface 10a. In this context, the adjacent direction refers to the extended direction of the linear boundary where the reflective side plate 20 and the reflective bottom surface 10a are in contact or close to each other. It should be noted that the specific positions of the light-emitting component in the bright area and the dark area of the reflective side plate 20 can be simulated by simulation software. Subsequently, according to the simulation results, the reflective protrusions 211 are specifically arranged in the bright area to enhance the directional reflection and convergence of light. In the dark area, the reflective grooves 212 are skillfully configured to guide and scatter the light, aiming to balance the light intensity distribution, reduce dark spots, and improve the overall illumination uniformity of the reflective side surface 21.
[0044] Based on the reflective sheet 100, the backlight module, and the display device of the present application, the reflective protrusions 211 and the reflective grooves 212 are arranged at intervals along the adjacent direction of the reflective side plate and the reflective bottom surface on the reflective side surface 21. Thus, when the light of the light-emitting component shines on the reflective side surface 21, on the one hand, when it shines on the reflective protrusions, it can guide the light to scatter in the light output direction, so as to shorten the propagation distance of the light from the backlight source to the screen surface, effectively enhancing the brightness of the dark area, reducing the dark frame phenomenon, and making the details of the dark part of the picture clearer and distinguishable. On the other hand, when the light shines into the reflective grooves 212, the light will be absorbed or scattered, increasing the propagation path of the light. In this way, the direct reflection of the light on the reflective side plate 20 is reduced, effectively curbing the problem of excessive brightness caused by excessive light convergence, so as to adjust the brightness of the bright area. In this way, by simultaneously setting the reflective protrusions and the reflective grooves 212 to reduce the brightness difference at the edge of the screen, the overall light output brightness is made more uniform. At the same time, the silk printing and punching steps in the traditional dimming process are avoided, simplifying the production process, reducing the production complexity and cost, and achieving higher production efficiency and lower manufacturing cost.
[0045] Refer toFigures 2 to 4 , in some structural forms, the outer surface of the reflection protrusion 211 is arranged as an arc surface. Since the arc-shaped reflection side surface 21 can guide light more gently and efficiently, avoiding the scattering and loss of light that may occur at sharp edges, it ensures the effective reflection and aggregation of light. This focusing effect not only improves the utilization rate of light during the reflection process but also makes the light more uniform when projected onto the screen or other target surfaces, reducing the contrast between the bright and dark areas and enhancing the comfort of the overall visual effect. In addition, the arc surface design also endows the reflection protrusion 211 with a certain light diffusion ability. By adjusting the curvature and position of the arc surface, fine control of the light propagation direction can be achieved, making the distribution of light in space more reasonable, avoiding the glare problem caused by excessive light concentration, and at the same time reducing the light dead angle, improving the coverage rate and uniformity of the lighting area.
[0046] Optionally, in the direction perpendicular to the reflection side surface 21, the height of the reflection protrusion 211 is H, where H is not less than 2 mm and not greater than 10 mm. Among them, when the height H of the reflection protrusion 211 is less than 2 mm, the volume of the reflection protrusion 211 will be too small, which may cause it to be unable to effectively reflect or guide light in the expected direction, thus weakening the reflection effect. When the height H of the reflection protrusion 211 exceeds 10 mm, its volume will increase significantly, which may not only increase the manufacturing cost and complexity but also introduce unnecessary weight and volume, affecting the overall optical layout. In addition, the too-large reflection protrusion 211 may also increase the loss of light during the reflection process because more light may be absorbed or scattered in non-target directions, thus reducing the light output brightness. Therefore, setting the height H of the reflection protrusion 211 within the range of 2 mm to 10 mm ensures that the reflection protrusion 211 has sufficient volume to play its optical guiding role while avoiding the adverse effects caused by excessive volume.
[0047] Referring to Figures 1 to 4 , in some structural forms, two adjacent reflection side plates 20 are arranged at an angle. The multiple reflection protrusions 211 include multiple first protrusion parts 2111 and multiple second protrusion parts 2112. In the length direction of the reflection side plate 20, the multiple first protrusion parts 2111 are respectively located at the edges of the reflection side plate 20 close to the other reflection side plate 20, and the multiple second protrusion parts 2112 are arranged between the first protrusion parts 2111 at both ends of the reflection side plate 20.
[0048] It can be understood that when two adjacent reflecting side plates 20 are arranged at an angle, a corner area will be formed. Since the corner area is usually a dark area, multiple first convex portions 2111 are respectively arranged at both ends of the reflecting side plate 20 close to the other reflecting side plate 20. It can be understood that when the number of the first convex portions 2111 is two, the two first convex portions 2111 are respectively arranged at both ends of the reflecting side plate 20 close to the other reflecting side plate 20. When the number of the first convex portions 2111 is three or more, at least two first convex portions 2111 can be arranged at one end of the reflecting side plate 20 close to the other reflecting side plate 20. In this way, by utilizing the reflection characteristics of the first convex portions 2111, the light that might otherwise fall into the dark area is redirected, thus significantly reducing the dark area phenomenon at the corners and improving the uniformity and coverage of the illumination. At the same time, multiple second convex portions 2112 located between the two first convex portions 2112 play a supplementary and optimizing role, further dispersing and homogenizing the propagation path of the light. This multi-level and multi-directional reflection mechanism enables the light to propagate more complexly and effectively within the entire structure, thereby avoiding the phenomenon of overly strong or overly weak light in a single direction or local area and improving the overall optical performance.
[0049] Furthermore, the volume size of the first convex portion 2111 is larger than that of the second convex portion 2112. It should be noted that both the first convex portion 2111 and the second convex portion 2112 can be arranged in a hemispherical shape, and the hemispherical radius of the first convex portion 2111 is larger than that of the second convex portion 2112, so that the volume size of the first convex portion 2111 is larger than that of the second convex portion 2112. In this way, the first convex portion 2111 with a larger volume size can increase the reflecting side area 21 and can also capture and redistribute more light from the backlight source due to its volume advantage. After being reflected by the first convex portion 2111, these lights will propagate along a wider path, thus effectively reducing the dark area range at the corners and further improving the uniformity of the overall illumination. The second convex portion 2112 also plays a role in reflecting light, but its volume size is small, so as to avoid occupying the setting space of the reflection groove 212, making the entire reflecting side 21 more flexible and variable while maintaining high-efficiency reflection and capable of adapting to different illumination requirements.
[0050] Refer to Figures 2 to 4, optionally, in a direction perpendicular to the reflection side surface 21, the groove walls of the reflection groove 212 include a connected reflection plane 2121 and a reflection arc surface 2122, and the reflection plane 2121 is arranged farther from the reflection bottom plate 10 than the reflection arc surface 2122. First, the high position arrangement of the reflection plane 2121 means that when the light first enters the reflection groove 212, since the reflection plane 2121 is far from the reflection bottom plate 10, the light will shoot towards the direction of the reflection arc surface 2122 after the first reflection, and it is more likely to form a longer propagation path inside the reflection groove 212, which creates favorable conditions for multiple reflections of the light. Second, as the light propagates in the reflection groove 212, due to the existence of the reflection arc surface 2122, with its unique curved surface form, it guides the light to undergo continuous and complex reflections. These reflections further extend the residence time of the light and cause the energy of the light to gradually decay during multiple scatterings and absorptions, thereby further effectively curbing the problem of excessive brightness caused by excessive light concentration.
[0051] Referring to Figure 4 , optionally, in a direction perpendicular to the reflection side surface 21, the depth range of the reflection groove 212 is D, where D is not less than 2 mm and not greater than 8 mm. Among them, when the depth D of the reflection groove 212 is less than 2 mm, the too shallow reflection groove 212 may not provide enough reflection path length for the light, resulting in the light not being fully scattered or absorbed in the groove, thus limiting the extinction effect. When the depth D of the reflection groove 212 is greater than 8 mm, the too deep groove design will also bring problems such as increased processing difficulty, increased material cost, and reduced space utilization. Thus, limiting the depth range D of the reflection groove 212 between 2 mm and 8 mm, this design not only follows the basic principles of light propagation and reflection but also fully considers the requirements and limitations of practical applications. It ensures that the reflection groove 212 can achieve efficient scattering and absorption of light within a limited space at a reasonable cost, thereby further improving the overall light control performance and extinction effect.
[0052] Combined with reference to Figure 1 , optionally, in the length direction of the reflection side plate 20, the reflection protrusions 211 and the reflection grooves 212 are alternately arranged. Among them, the plurality of mounting through holes 11 are arranged in an array, and the opposite ends of the mounting through holes 11 in the same column are respectively arranged opposite to a reflection groove 212, the opposite ends of the mounting through holes 11 in the same row are respectively arranged opposite to a reflection groove 212, and a reflection protrusion 211 is located between the mounting through holes 11 in adjacent rows or adjacent columns.
[0053] It can be understood that the area far from the light source (here is the position of the mounting through-hole 11) often forms a dark area due to the relatively long light propagation distance compared to other areas, while the position close to the light source forms a bright area due to the relatively short light propagation distance compared to other areas. Thus, by placing the reflection protrusions 211 between the mounting through-holes 11 in adjacent rows or between the mounting through-holes 11 in adjacent columns, they can collect and concentrate the light from the mounting through-holes 11 on both sides, and then direct this light to the positions that might originally form dark areas. This process not only increases the brightness of this area but also makes the light distribution in the entire illumination area more uniform. At the same time, the opposite ends of the mounting through-holes 11 in the same column are respectively arranged opposite to a reflection groove 212, and the opposite ends of the mounting through-holes 11 in the same row are respectively arranged opposite to a reflection groove 212, which can effectively reduce the direct irradiation of light at the position close to the mounting through-hole 11, thereby reducing the brightness of this area. This design not only helps to alleviate the glare problem caused by overly concentrated light but also makes the overall brightness softer.
[0054] Referring to Figures 2 to 4 , optionally, in the thickness direction of the reflection bottom plate 10, the lower edges of the plurality of reflection protrusions 211 and the lower edges of the openings of the plurality of reflection grooves 212 are located at the same height. First of all, from an optical perspective, when the lower edges of the reflection protrusions 211 and the reflection grooves 212 are at the same horizontal plane, the light can maintain a more consistent path and angle when passing through these structures. This consistency helps to reduce the scattering and loss of light during the reflection process, thereby improving the utilization efficiency of light energy. At the same time, it also ensures that the light can be distributed in the expected direction and intensity after reflection, thus enhancing the performance of the entire lighting system.
[0055] Secondly, from the perspective of manufacturing and installation, aligning the lower edges of the reflection protrusions 211 and the reflection grooves 212 to the same height also simplifies the production process. Such a design makes it easier to achieve precise dimensional control and positioning during the processing of the reflection bottom plate 10, reducing the production difficulty and cost. At the same time, during the installation process, this consistency also helps to improve the installation accuracy and efficiency, reducing the performance degradation caused by dimensional deviation or improper installation.
[0056] Optionally, the reflection groove 212 and the reflection protrusion 211 are formed by stamping the reflection side plate 20. Among them, stamping, as a mature metal processing technology, can accurately and quickly form the required reflection groove 212 and reflection protrusion 211 on the reflection side plate 20. This process can ensure that the dimensions, shapes, and positions of each reflection groove 212 and reflection protrusion 211 reach extremely high precision, thus avoiding errors and deviations that may occur in subsequent processing. At the same time, stamping can endow the reflection side plate 20 with a more complex surface morphology while maintaining the original characteristics of the material of the reflection side plate 20, enhancing the functionality and aesthetics of the reflection side plate 20. Secondly, from the perspective of economic benefits, the stamping technology has the advantages of high production efficiency and low cost. Since the stamping process can be automated, it can greatly improve production efficiency and reduce labor costs. In addition, stamping can also reduce waste of raw materials, improve material utilization rate, and further reduce production costs.
[0057] The present application also provides a backlight module, which includes a back plate, a plurality of light-emitting components, and a reflective sheet 100. The plurality of light-emitting components are arranged on the back plate. The reflective sheet 100 is disposed on the back plate, and a light-emitting component passes through the mounting through-hole 11. The back plate serves as the mounting base for the plurality of light-emitting components and the reflective sheet 100. The light-emitting components on the backlight source provide light, which can be reflected by the reflective sheet 100 to emit more dispersed, uniform, and soft light.
[0058] For the specific structure of the reflective sheet 100, reference may be made to the above embodiments. Since this backlight module adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.
[0059] The present application also provides a display device, which includes the backlight module as described above. In addition, the display device further includes a display module, which is mounted on the backlight module and is lit by the backlight module to display content. Among them, the display device can be an intelligent interactive flat panel, an electronic whiteboard, a television, etc.
[0060] In the drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present application, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present 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 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.
[0061] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.
Claims
1. A reflective sheet is applied to a backlight module, and the backlight module includes a plurality of light-emitting elements, characterized in that, The reflective sheet includes: A reflective bottom plate having a reflective bottom surface and a plurality of mounting through-holes penetrating the reflective bottom surface, and one of the mounting through-holes is for a light-emitting component to pass through; and A plurality of reflective side plates sequentially connected along the periphery of the reflective bottom plate, and the reflective side plates are arranged at an angle with the reflective bottom plate and extend in a direction away from the reflective bottom plate; Wherein, the reflective side plate includes a reflective side surface adjacent to the reflective bottom surface, and a plurality of reflective protrusions and a plurality of reflective grooves are provided on the reflective side surface, and the plurality of reflective protrusions and the plurality of reflective grooves are arranged at intervals along the length direction of the reflective side plate, wherein the length direction is the adjacent direction of the reflective side plate and the reflective bottom surface.
2. The reflective sheet according to claim 1, wherein, The outer surface of the reflective protrusion is arranged in an arc shape; And / or, in a direction perpendicular to the reflective side surface, the height of the reflective protrusion is H, H is not less than 2 mm and not more than 10 mm.
3. The reflective sheet according to claim 1, wherein, The reflective protrusion includes a plurality of first protrusion parts and a plurality of second protrusion parts. In the length direction of the reflective side plate, the first protrusion parts are respectively located at both ends of the reflective side plate close to another reflective side plate, and the plurality of second protrusion parts are arranged between the first protrusion parts at both ends of the reflective side plate; The volume size of the first protrusion part is larger than the volume size of the second protrusion part.
4. The reflective sheet according to claim 1, wherein In a direction perpendicular to the reflective side surface, the groove wall of the reflective groove includes a connected reflective plane and a reflective arc surface, and the reflective plane is arranged farther from the reflective bottom plate than the reflective arc surface.
5. The reflective sheet according to claim 1, wherein, In a direction perpendicular to the reflective side surface, the depth range of the reflective groove is D, D is not less than 2 mm and not more than 8 mm.
6. The reflective sheet according to claim 1, wherein, In the length direction of the reflective side plate, the reflective protrusions and the reflective grooves are alternately arranged; Wherein, the plurality of mounting through-holes are arranged in an array, and the opposite ends of the same column of mounting through-holes are respectively arranged opposite to a reflective groove, and the opposite ends of the same row of mounting through-holes are respectively arranged opposite to a reflective groove, and a reflective protrusion is located between the mounting through-holes in adjacent two rows or adjacent two columns.
7. The reflective sheet according to claim 1, wherein, In the thickness direction of the reflective bottom plate, the lower edges of the plurality of reflective protrusions and the lower edges of the openings of the plurality of reflective grooves are at the same height.
8. The reflective sheet according to claim 1, wherein, The reflective grooves and the reflective protrusions are formed by stamping the reflective side plate.
9. A backlight module, characterized in that, Comprising A back plate; A plurality of light-emitting components arranged on the back plate; And The reflective sheet according to any one of claims 1 to 8, the reflective sheet is arranged on the back plate, and a light-emitting component passes through one of the mounting through-holes.
10. A display device, characterized in that, Comprising the backlight module according to claim 9.