An ultra-thin, high-brightness miniLED light guide structure for smart terminal devices

Abstract

This utility model belongs to the field of light guide structure technology and discloses an ultra-thin, high-brightness miniLED light guide structure for smart terminal devices. It aims to achieve excellent light uniformity at a minimum thickness of only 0.4mm by optimizing the geometry, internal microstructure layout, and material properties of the miniLED light guide structure, while effectively suppressing hot spots. This meets the ultra-thin and high-quality display requirements of smartphones, smartwatches, AR / VR, and other electronic products. The structure includes a light guide plate with a grooved mounting hole at its center. Multiple miniLED beads are arranged in a circumferential array along the edge of the light guide plate. Local light trap holes corresponding to the miniLED beads are formed on the light guide plate. A segmented holographic diffraction layer is provided on the light-incident surface of the light guide plate. Multiple asymmetric microprisms are arrayed in the central area of ​​the side of the light guide plate facing the miniLED beads. A mirrored silver reflective film is placed above the asymmetric microprisms. A light-shielding reflective film is attached to the side of the light guide plate facing away from the mirrored silver reflective film.

Description

Technical Field

[0001] This utility model belongs to the field of light guide structure technology, specifically, it relates to an ultra-thin, high-brightness miniLED light guide structure for smart terminal devices. Background Technology

[0002] With the widespread application of Mini LED technology in high-end displays, its advantages such as high brightness, high contrast, and local dimming have made it an important direction for next-generation backlight solutions. Especially in consumer electronics products such as smartphones, smartwatches, and AR / VR devices, achieving a Mini LED light guide solution that combines ultra-thin structure with uniform light emission has become crucial for improving product display quality and market competitiveness.

[0003] However, in ultra-thin devices with extremely stringent thickness requirements, traditional Mini LED light guide structures face multiple challenges: to ensure uniform light diffusion, their thickness typically needs to be greater than 1mm, making it difficult to meet the trend of continuously thinner and lighter devices; when the spacing between Mini LED beads is small, the dense distribution of point light sources easily produces "hot spots" or "bead marks," severely affecting the visual experience; if the Mini LED light guide structure is compressed to less than 1mm or even thinner, traditional light guide dots or prism light guide microstructures cannot perform effective optical control, resulting in reduced light guide efficiency and weak light emission uniformity; furthermore, in an excessively thin light guide space, the Mini LED is too close to the light-emitting surface, and its RGB three-color light will not mix sufficiently, easily producing uneven color mixing and noise. Currently, common solutions mostly rely on stacking optical films or increasing the thickness of the light guide structure, which not only sacrifices the advantages of thinness but also increases costs.

[0004] Therefore, there is an urgent need for a Mini LED light guide structure that can achieve high uniformity of light emission in an ultra-thin structure, in order to overcome the current conflict between Mini LED and light guide structure and meet the requirements of consumer electronic devices for thinness and high-quality light emission. Summary of the Invention

[0005] The main objective of this invention is to provide an ultra-thin, high-brightness miniLED light guide structure for smart terminal devices. By optimizing the geometry, internal microstructure layout, and material properties of the miniLED light guide structure, excellent light emission uniformity can still be achieved with an extreme thickness of only 0.4mm at its thinnest point, while effectively suppressing hot spots. This meets the ultra-thin and high-quality display requirements of consumer electronics products such as smartphones, smartwatches, and AR / VR devices.

[0006] The present invention adopts the following technical solution:

[0007] An ultra-thin, high-brightness miniLED light guide structure for smart terminal devices includes a ring-shaped light guide plate. A grooved mounting hole is provided above the center of the light guide plate. Multiple miniLED beads are arranged in a circumferential array along the edge of the light guide plate above it. Local light trap holes corresponding one-to-one with the multiple miniLED beads are formed on the light guide plate. Multiple asymmetric microprisms are arranged in an array in the central area of ​​the side of the light guide plate facing the miniLED beads. A mirror silver reflective film is provided above the multiple asymmetric microprisms. A light-shielding reflective film is attached to the side of the light guide plate facing away from the mirror silver reflective film.

[0008] Furthermore, the diameter of each of the local light trap holes is 1.2 mm, the opening depth of each of the local light trap holes is 0.1 to 0.2 mm, and the inner wall of each of the local light trap holes is coated with a black light-absorbing coating.

[0009] Furthermore, the segmented holographic diffraction layer is configured in a one-to-one correspondence with the plurality of miniLED beads, and the diffraction area of ​​each segmented holographic diffraction layer covers an annular range of 1.5mm outside the light-emitting surface of the corresponding miniLED bead, and the diffraction efficiency of the segmented holographic diffraction layer is not less than 70%.

[0010] Furthermore, the height of the plurality of asymmetric microprisms increases outward from the center of the light guide plate, the height range of each asymmetric microprism is 0.05mm to 0.2mm, the spacing between each asymmetric microprism is less than 0.2mm, and the tilt angle of each asymmetric microprism is optimized by simulation to control the deflection angle of the main optical path within ±15°.

[0011] Furthermore, the light guide plate is made of optical-grade PMMA or PC material with a light transmittance greater than 92%, the size of the light guide plate is 160mm×75mm, the thickness of the light guide plate is 0.4mm-0.6mm, and the thickness of the light guide plate in the light-incident area corresponding to each miniLED bead gradually decreases from the edge to the inner edge, reaching a minimum of 0.4mm.

[0012] Furthermore, the opening diameter of the groove assembly hole is 15mm-20mm, the inner wall of the groove assembly hole is provided with micron-level reflective texture, and the outer surface of the groove assembly hole is provided with a high-density diffraction microstructure layer.

[0013] Furthermore, the dimensions of the plurality of miniLED beads are 1mm × 1mm, and the spacing between each miniLED bead is 3.1mm.

[0014] Furthermore, the side of the mirror silver reflective film facing the light guide plate is printed with white ink, and the other side is coated with black light-blocking ink.

[0015] Furthermore, the light-shielding reflective film covers the area of ​​the light guide plate except for the groove mounting hole.

[0016] Beneficial effects:

[0017] In this utility model:

[0018] First, by asymmetrically varying the overall thickness of the light guide plate, gradually thinning it from the side closest to the mini LED beads inwards to a minimum of 0.4mm, the overall thickness of the light guide plate is controlled within the range of 0.4mm-0.6mm. This achieves extreme thinness of the light guide plate while providing a propagation path that conforms to the natural attenuation law of light. Simultaneously, by setting a segmented holographic diffraction layer on the light-incident surface of the light guide plate, and dividing the layer into sections based on the precisely designed 3.1mm pitch mini LED beads, the diffraction period of each section is adapted to the light emission characteristics of the corresponding LED beads. This allows for the directional coupling of point source light into guided mode light within the light guide plate with a diffraction efficiency of no less than 70%, thus successfully resolving the core contradiction between ultra-thinness and high luminous efficiency.

[0019] Second, local light trap holes are set in the light-emitting area of ​​each mini LED bead on the light guide plate. These holes, combined with a black light-absorbing coating on their walls, directly absorb and eliminate excess light energy generated by direct or initial reflection from the mini LED bead, preventing localized hot spots due to secondary reflection. Simultaneously, asymmetric microprisms are arrayed on one side of the light guide plate, with heights increasing from the center to 0.05mm to 0.2mm outwards and adjacent spacing less than 0.2mm. The tilt angle of each asymmetric microprism is optimized through optical simulation to ensure that the main deflection angle of the emitted light path is strictly controlled within ±15°. The combination of the light trap holes' "absorption and elimination" and the asymmetric microprism array's "angle control and lateral mixing" significantly reduces the peak brightness fluctuation of the final light-emitting surface, achieving precise control of the light field. This effectively eliminates the visual "LED bead effect" and greatly improves the uniformity of light emission.

[0020] Third, by setting micron-level reflective textures on the inner wall of the mounting holes in the light guide plate, the incident light from the periphery is guided to change direction and diffuse radially, thus avoiding excessive brightness due to light concentration in the central area of ​​the hole. Simultaneously, a high-density diffraction microstructure layer is integrated on the outer surface of the mounting holes to perform high-frequency, fine secondary diffusion and mixing of the light beam passing through this area. The synergistic effect of the radial light guiding of the inner wall texture and the diffraction mixing of the outer microstructure significantly enhances the light field mixing capability of this special area, effectively solving the problem of insufficient light mixing and uneven color mixing caused by excessively short mixing paths or structural abrupt changes. In summary, through the above triple synergistic optical control, the technical challenges of ultra-thin, high-brightness light guide structures for miniLEDs are solved: the coupling layer ensures efficient light input under ultra-thin conditions; the control layer eliminates the "lamp bead" effect and improves uniformity; and the mixing layer suppresses edge color variations. Ultimately, a highly uniform, particle-free, and color-difference-free light emission effect is achieved within a thickness of 0.4-0.6 mm, meeting the requirements of consumer electronic devices for thinness and high-quality light emission. Attached Figure Description

[0021] Figure 1 This is an exploded view of an ultra-thin, high-brightness miniLED light guide structure for smart terminal devices according to this utility model.

[0022] Figure 2 This is a schematic diagram of the back of an ultra-thin, high-brightness miniLED light guide structure for smart terminal devices according to this utility model.

[0023] Figure 3 This is a schematic diagram of the front of an ultra-thin, high-brightness miniLED light guide structure for smart terminal devices according to this utility model.

[0024] Figure 4 This is a schematic diagram of the final light effect of an ultra-thin, high-brightness miniLED light guide structure for smart terminal devices according to this utility model.

[0025] The components include: 1. Light guide plate; 2. Groove mounting hole; 3. MiniLED lamp bead; 4. Local light trap hole; 5. Segmented holographic diffraction layer; 6. Asymmetric microprism; 7. Mirror silver reflective film; 8. Light-shielding reflective film.

[0026] 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

[0027] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0028] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly and specifically defined.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] Reference Figures 1 to 4This invention proposes an ultra-thin, high-brightness miniLED light guide structure for smart terminal devices, comprising a ring-shaped light guide plate 1. The light guide plate 1 is the basic optical carrier for achieving ultra-thinness and efficient light transmission. A groove mounting hole 2 is provided above the center of the light guide plate 1. The groove mounting hole 2 is used for structural fixation and to reserve optical space for components such as camera modules. The raised annular surface (protruding edge) of the groove mounting hole 2 ultimately presents a uniform ring-shaped light emission. Multiple miniLED beads 3 are arranged in a circumferential array above the light guide plate 1 along the edge of the light guide plate 1. The multiple miniLED beads 3 emit light as point light sources. Local light trap holes 4 are opened on the light guide plate 1, corresponding one-to-one with the multiple miniLED beads 3. The local light trap holes 4 are used to absorb excessive direct light. To suppress the formation of local hot spots, a segmented holographic diffraction layer 5 is provided on the light-incident surface of the light guide plate 1. The segmented holographic diffraction layer 5 is used to efficiently and directionally couple the light from the point source into the interior of the ultra-thin light guide plate 1. In the central area of ​​the side of the light guide plate 1 facing the miniLED lamp bead 3, multiple asymmetric microprisms 6 are arranged in an array. The multiple asymmetric microprisms 6 are used to control the light output angle and enhance the lateral light mixing to eliminate the visual graininess. A mirror silver reflective film 7 is provided above the multiple asymmetric microprisms 6. The mirror silver reflective film 7 is used to reflect the downwardly scattered light back to the light guide plate 1 to improve the light energy utilization rate. A light-shielding reflective film 8 is attached to the side of the light guide plate 1 facing away from the mirror silver reflective film 7. The light-shielding reflective film 8 is used to prevent light from leaking from the back and ensure that the light energy is concentrated and output to the light-emitting surface in front.

[0032] Specifically, the light path is controlled and optimized through the coordinated operation of various components. The light emitted by the miniLED lamp bead 3 passes through the segmented holographic diffraction layer 5 on the light-incident surface of the light guide plate 1, and is precisely and directionally coupled into the interior of the light guide plate 1 with a diffraction efficiency of no less than 70%. This fundamentally overcomes the problem of insufficient light energy injection under ultra-thin structures, providing a guarantee of luminous flux for achieving overall high brightness. During transmission in the gradually thickened path of the light guide plate 1, the design of the thickness gradually decreasing from the edge to the inner edge conforms to the natural attenuation law of light intensity, optimizes the spatial distribution of light energy, and creates conditions for uniform light output. At the same time, the local light trap holes 4 corresponding to the lamp beads directly absorb excess direct and primary reflected light energy, thereby eliminating the possibility of forming local hot spots at the source and significantly improving the uniformity of the light-emitting surface. The light transmitted to the light-emitting area passes through a system with optimized height and tilt angle. The precise angle control and forced lateral light mixing of multiple asymmetric microprisms 6 effectively disrupt the spatial distribution of the original point light source, visually eliminating the "light bulb" effect and achieving microscopic homogenization of the light field. At the same time, the mirror silver reflective film 7 efficiently reflects and recovers the downwardly scattered light energy, and the light-shielding reflective film 8 blocks back light leakage, maximizing the utilization of light energy and ensuring a unique light output direction, thus improving the overall light effect and contrast. Finally, all the light rays converging into the area of ​​the groove mounting hole 2 are radially diffused through the micron-level reflective texture of its inner wall to fill the dark area, and then undergo final fine diffusion and color mixing through the high-density diffraction microstructure layer on the periphery. This collaborative processing solves the problems of optical interruption and light mixing path shortage caused by mechanical openings, and resolves the uneven brightness and color separation phenomena in this area. The optical system of this solution is controlled in a step-by-step manner, so that the light is finally emitted from the annular convex edge of the convex groove assembly hole 2, resulting in a uniform, color-difference-free, grain-free, and high-brightness surface light source. This solves the problems of light efficiency, uniformity, and color mixing in ultra-thin MiniLED light guide structures, thereby meeting the requirements of consumer electronic devices for thinness and high-quality light emission.

[0033] refer to Figures 1 to 4 In one embodiment, each local light trap hole 4 has a diameter of 1.2 mm and an opening depth of 0.1 to 0.2 mm. The inner wall of each local light trap hole 4 is coated with a black light-absorbing coating. The local light trap hole 4 directly absorbs and eliminates the excess light energy formed by the direct or initial reflection of the corresponding miniLED lamp bead 3. Its size design achieves efficient capture within the spatial constraints of the ultra-thin light guide plate 1. The black light-absorbing coating on the inner wall ensures that the light energy is completely absorbed, thereby preventing the generation of local hot spots due to secondary reflection from the source.

[0034] refer to Figures 1 to 4In one embodiment, a segmented holographic diffraction layer 5 is configured in a one-to-one correspondence with multiple miniLED beads 3. The diffraction area of ​​each segmented holographic diffraction layer 5 covers a 1.5mm annular range outside the light-emitting surface of the corresponding miniLED bead 3. The diffraction efficiency of the segmented holographic diffraction layer 5 is not less than 70%. The segmented holographic diffraction layer 5 directionally couples the point light source light from the miniLED beads 3 into the interior of the light guide plate 1 with an efficiency of not less than 70%. The segmented holographic diffraction layer 5, with its one-to-one correspondence with the miniLED beads 3 and its 1.5mm effective range, ensures precise matching with the 3.1mm lamp spacing, which is key to achieving high light efficiency injection in an ultra-thin structure. In practical applications, the specific partitioning parameters of this diffraction layer can be adapted to the actual size and luminous characteristics of the selected miniLED beads 3.

[0035] refer to Figures 1 to 4 In one embodiment, the height of multiple asymmetric microprisms 6 increases outward from the center of the light guide plate 1. The height of each asymmetric microprism 6 ranges from 0.05mm to 0.2mm, and the spacing between each asymmetric microprism 6 is less than 0.2mm. The tilt angle of each asymmetric microprism 6 is optimized through simulation to control the deflection angle of the main optical path within ±15°. The array of asymmetric microprisms 6 is used to ultimately regulate the light emitted from the light-emitting surface of the light guide plate 1. Its height gradient distribution is used to compensate for light intensity attenuation and achieve illuminance balance. The optimized tilt angle controls the deflection angle of the main optical path within ±15°, thereby mixing the light laterally, thus visually eliminating lamp bead traces and improving the uniformity of light emitted from the annular convex edge of the mounting hole 2.

[0036] refer to Figures 1 to 4 In one embodiment, the light guide plate 1 is made of optical-grade PMMA or PC material with a light transmittance greater than 92%. The dimensions of the light guide plate 1 are 160mm × 75mm, and the thickness of the light guide plate 1 is 0.4mm-0.6mm. The actual size can be adapted to the specifications of the terminal device. The thickness of the light guide plate 1 in the light-incident area corresponding to each miniLED bead 3 gradually decreases from the edge to the inner edge, reaching a minimum of 0.4mm. The light guide plate 1 serves as the main body of the low-loss optical waveguide. Its asymmetric gradient thickness design constructs a propagation path that conforms to the natural attenuation law of light, achieving an ultra-thin 0.4mm-0.6mm thickness while providing a geometric basis for efficient light transmission and optimized spatial distribution.

[0037] refer to Figures 1 to 4In one embodiment, the diameter of the groove mounting hole 2 is 15mm-20mm. The inner wall of the groove mounting hole 2 is provided with a micron-level reflective texture, and the outer surface of the groove mounting hole 2 is provided with a high-density diffraction microstructure layer. The micron-level reflective texture on the inner wall of the groove mounting hole 2 is used to guide light to diffuse radially, avoiding the central area from being too dark or too bright. The high-density diffraction microstructure layer on the outer surface of the groove mounting hole 2 performs final fine diffusion and mixing of the light beam passing through this area. The two work together to solve the problems of insufficient light mixing and color noise caused by mechanical opening, ultimately enabling the light-emitting surface of the annular convex edge of the groove mounting hole 2 to emit high-brightness uniform light.

[0038] refer to Figures 1 to 4 In one embodiment, the size of the multiple miniLED beads 3 is 1mm×1mm. In practical applications, the size of the miniLED beads 3 can be adapted to meet specific brightness and uniformity requirements, and their light guide paths can be optimized accordingly. The spacing between each miniLED bead 3 is 3.1mm. This spacing is the geometric reference for the partitioning of the segmented holographic diffraction layer 5 and the positioning layout of the local light trap holes 4, ensuring that the optical microstructures integrated on the light guide plate 1 can be precisely matched and work together with the light source array.

[0039] refer to Figures 1 to 4 In one embodiment, the side of the mirror silver reflective film 7 facing the light guide plate 1 is printed with white ink, and the other side is coated with black light-blocking ink. The white ink side of the mirror silver reflective film 7 facing the light guide plate 1 is used to efficiently reflect light and improve the light energy utilization rate. The black light-blocking ink on the back side is used to absorb transmitted stray light, ensure the purity of the light path, and prevent the generation of interfering stray light in the light path.

[0040] refer to Figures 1 to 4 In one embodiment, the light-shielding reflective film 8 covers the area of ​​the light guide plate 1 except for the groove mounting hole 2. The light-shielding reflective film 8 reflects and recovers the edge stray light and blocks light leakage in unexpected directions, thereby ensuring that all light energy is directionally output from the light-emitting surface of the groove mounting hole 2, and ensuring that all light energy is directionally and centrally output from the annular light-emitting surface, thus improving the brightness of the light-emitting surface and the uniformity of the annular light emission.

[0041] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A light guide structure for an ultra-thin, high-brightness miniLED lamp used in smart terminal devices, characterized in that, The light guide plate (1) is in the shape of a ring. A groove mounting hole (2) is provided above the center of the light guide plate (1). Multiple miniLED beads (3) are arranged in a circumferential array above the light guide plate (1) along the edge of the light guide plate (1). Local light trap holes (4) are opened on the light guide plate (1) and correspond one-to-one with the multiple miniLED beads (3). A segmented holographic diffraction layer (5) is provided on the light incident surface of the light guide plate (1). Multiple asymmetric microprisms (6) are arranged in an array in the central area of ​​the side of the light guide plate (1) facing the miniLED beads (3). A mirror silver reflective film (7) is provided above the multiple asymmetric microprisms (6). A light-shielding reflective film (8) is attached to the side of the light guide plate (1) facing away from the mirror silver reflective film (7).

2. The ultra-thin, high-brightness miniLED light guide structure for smart terminal devices according to claim 1, characterized in that, Each of the local light trap holes (4) has a diameter of 1.2 mm, an opening depth of 0.1 to 0.2 mm, and an inner wall of each of the local light trap holes (4) is coated with a black light-absorbing coating.

3. The ultra-thin, high-brightness miniLED light guide structure for smart terminal devices according to claim 1, characterized in that, The segmented holographic diffraction layer (5) is configured in a one-to-one correspondence with the plurality of miniLED beads (3). The diffraction area of ​​each segmented holographic diffraction layer (5) covers an annular range of 1.5mm outside the light-emitting surface of the corresponding miniLED bead (3). The diffraction efficiency of the segmented holographic diffraction layer (5) is not less than 70%.

4. The ultra-thin, high-brightness miniLED light guide structure for smart terminal devices according to claim 1, characterized in that, The height of the multiple asymmetric microprisms (6) increases outward from the center of the light guide plate (1). The height of each asymmetric microprism (6) ranges from 0.05mm to 0.2mm. The spacing between each asymmetric microprism (6) is less than 0.2mm. The tilt angle of each asymmetric microprism (6) is optimized by simulation to control the deflection angle of the main optical path within ±15°.

5. The ultra-thin, high-brightness miniLED light guide structure for smart terminal devices according to claim 1, characterized in that, The light guide plate (1) is made of optical grade PMMA or PC material with a light transmittance greater than 92%. The size of the light guide plate (1) is 160mm×75mm. The thickness of the light guide plate (1) is 0.4mm-0.6mm. The thickness of the light guide plate (1) in the light-incident area corresponding to each miniLED bead (3) gradually decreases from the edge to the inner edge, reaching a minimum of 0.4mm.

6. The ultra-thin, high-brightness miniLED light guide structure for smart terminal devices according to claim 1, characterized in that, The opening diameter of the groove assembly hole (2) is 15mm-20mm. The inner wall of the groove assembly hole (2) is provided with micron-level reflective texture, and the outer surface of the groove assembly hole (2) is provided with a high-density diffraction microstructure layer.

7. The ultra-thin, high-brightness miniLED light guide structure for smart terminal devices according to claim 1, characterized in that, The size of each miniLED bead (3) is 1mm×1mm, and the spacing between each miniLED bead (3) is 3.1mm.

8. The ultra-thin, high-brightness miniLED light guide structure for smart terminal devices according to claim 1, characterized in that, The mirror silver reflective film (7) has white ink printed on one side facing the light guide plate (1), and black light-blocking ink coated on the other side.

9. The ultra-thin, high-brightness miniLED light guide structure for smart terminal devices according to claim 1, characterized in that, The light-shielding reflective film (8) covers the area of ​​the light guide plate (1) except for the groove mounting hole (2).

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