A backlight module for mini LED and its fixing structure

Abstract

Abstract The present invention discloses a backlight module for Mini LED and its fixing structure. The backlight module comprises: a backlight, a base, a light guide plate and an optical film, wherein the base is formed with a receiving cavity having a concave-arched platform is provided and a bottom surface of the base is formed as a recessed structure, a plurality of protruding ribs are arranged at the recessed structure. The backlight comprises a substrate and a plurality of LED lamp beads, wherein the substrate is attached to the concave-arched platform. The light guide plate and the optical film are sequentially stacked over the LED lamp beads of the backlight. The module fixing structure further comprises: a first inner bracket, a second inner bracket, an outer frame and a positioning plug, wherein the first inner bracket and the second inner bracket are slidably arranged in the receiving cavity and configured to slidably close to each other so as to clamp the light guide plate and the optical film. The backlight module and its fixing structure of the present invention significantly enhance overall thermal dissipation performance, facilitating the installation and removal operation of the backlight module, thereby improving the product quality and extending the service life. Abstract The present invention discloses a backlight module for Mini LED and its fixing structure. The backlight module comprises: a backlight, a base, a light guide plate and an optical film, wherein the base is formed with a receiving cavity having a concave-arched platform is provided and a bottom surface of the base is formed as a recessed structure, a plurality of protruding ribs are arranged at the recessed structure. The backlight comprises a substrate and a plurality of LED lamp beads, wherein the substrate is attached to the concave-arched platform. The light guide plate and the optical film are sequentially stacked over the LED lamp beads of the backlight. The module fixing structure further comprises: a first inner bracket, a second inner bracket, an outer frame and a positioning plug, wherein the first inner bracket and the second inner bracket are slidably arranged in the receiving cavity and configured to slidably close to each other SO as to clamp the light guide plate and the optical film. The backlight module and its fixing structure of the present invention significantly enhance overall thermal dissipation performance, facilitating the installation and removal operation of the backlight module, thereby improving the product quality and extending the service life. 20 25 20 45 64 18 J un 2 02 5 2 0 2 5 2 0 4 5 6 4 1 8 J u n 2 0 2 5 2 0 2 5 2 0 4 5 6 4 1 8 J u n 2 0 2 5 13 1 / 9 Fig.1 1 / 9 100 140 130 110 HIK 120 Fig.1 13 20 25 20 45 64 18 J un 2 02 5 J u n 2 0 2 5 2 0 2 5 2 0 4 5 6 4 1 8 1 3 0 J u n 2 0 2 5 2 0 2 5 2 0 4 5 6 4 1 8 1 3 0

Description

TECHNICAL FIELD

[0001] The present invention relates to technical field of backlight module, in particular to a backlight module for Mini LED and its fixing structure. BACKGROUND

[0002] A backlight module is one of the key components of an LCD panel, whose function is to provide sufficient brightness and uniformly distributed light source for normal image display. Previously, the conventional backlight module has a relatively large number of lamp beads, resulting in excessive gaps between the lamp beads, which is easily to cause the problem such as uneven backlighting and dark at four corners. At the same time, the number of light-control zones is small, resulting in insufficiently fine control of the light, in which halo problems are easily to occur. With the development of science and technology, the backlight module in the state of art can make the lamp beads and tiny and dense, thus improving the uniformity of the backlight, increasing the number of local dimming, these tiny lamp beads are called Mini LED. Application of Mini LED backlight module can actually enhance the LCD picture quality effect, reduce the halo phenomenon.

[0003] However, in the state of art, the Mini LED backlight module still has the following drawbacks: on the one hand, the thermal dissipation ability of the backlight module is insufficient, the LED will generate a lot of heat while working, which needs to be dissipated timely, and the configuration of Mini LEDs is relatively dense, resulting in the poor overall thermal dissipation of the backlight module, affecting the working life of the Mini LEDs. On the other hand, it is inconvenient to install and remove the backlight module, and it is easy to cause the optical film to be wrinkled or broken when it is installed and removed and easy to cause the optical film, to be folded or broken when it is removed for maintenance, which affects its working life.

[0004] In this regard, the present invention relates to a backlight module for Mini LED and fixing structure thereof to solve the above-identified technical problems. 2025204564   18 Jun 2025 SUMMARY

[0005] In view of the deficiencies of the state of art, the present invention provides a backlight module for Mini LED and its fixing structure, so as to enhance overall thermal dissipation performance, facilitate the installation and remove the backlight module, thereby improving the product quality and extending product service life.

[0006] The object of the present invention is realized through the following technical solutions:

[0007] A backlight module for Mini LED, comprising: a backlight, a base, a light guide plate and an optical film, wherein the base is formed with a receiving cavity and the backlight is disposed in the receiving cavity;

[0008] A concave-arched platform is arranged in the receiving cavity of the base, and a recessed structure is formed at position corresponding to the bottom surface of the base, wherein a plurality of protruding ribs are disposed at the recessed structure. Backlight comprises a substrate and a plurality of LED lamp beads arranged thereon, substrate is attached to the concave-arched platform, LED lamp beads are facing toward on opening direction of the receiving cavity.

[0009] The light guide plate and the optical film are stacked on the LED lamp beads of the backlight.

[0010] In one of the embodiments of the disclosure, the base is an aluminum-based material structure, and an insulating thermally conductive silicone grease is disposed between the concave-arched platform and the substrate.

[0011] In one of the embodiments of the disclosure, the LED lamp beads are arranged in an array on the substrate, wherein each LED lamp beads have a size less than or equal to 500 micrometer(s), and a distance between the light emitting centers of each adjacent LED lamp beads is less than or equal to 1,000 micrometer(s).

[0012] In one of the embodiments of the disclosure, the LED lamp beads comprise a light emitting chip and a colloid, the light emitting chips are weld to the substrate, the colloid covers the light emitting chips and the colloid has light transmitting structure.

[0013] In one of the embodiments of the disclosure, a cross-sectional profile of the colloid comprises, but is not limited to one or a combination of a spherical shape, a conical shape, a truncated conical shape, and a conical curve shape, wherein an edge of the colloid is spaced apart from the light emitting chip by 50 - 200 micrometer(s).

[0014] In one of the embodiments of the disclosure, the optical film is composed of a lower diffusion film, a brightness enhancement film, and an upper diffusion film which are stacked in sequence. The 2025204564   18 Jun 2025 lower diffusion film is attached to the light guide plate, and the lower diffusion film is proximate to the backlight.

[0015] A module fixing structure, comprising the above-mentioned backlight module, also: a first inner bracket, a second inner bracket, an outer frame, and a positioning plug. The first inner bracket and the second inner bracket are both slidably disposed in the receiving cavity, and both of them are configured to slidably approach each other so as to clamp the light guide plate and the optical film.

[0016] The outer frame is detachably covered on the receiving cavity of the base, and the outer frame is provided with a light exit window.

[0017] The side walls of the outer frame and the base are both provided with waist-shaped through holes, and both waist-shaped through holes that are aligned with each other. The first inner bracket and the second inner bracket are each provided with an extension arm, wherein the extension arm is provided with a slider, which is housed in the waist-shaped through-hole of the base.

[0018] The extension arm is also provided with a projecting stud, which is housed in the waist-shaped through-hole of the base, and the positioning plug is adapted to engage with the projecting stud. When the positioning plug is sleevedly provided on the projecting stud, an edge of the positioning plug will be held against the inner wall of the waist-shaped through-hole, thereby limiting the sliding of the first inner bracket, the second inner bracket.

[0019] In one of the embodiments of the disclosure, the first inner bracket and the second inner bracket are provided with a plurality of elevating blocks, the positions of the elevating blocks correspond to the short edges of the optical film, and the vertices of the elevating blocks are at the same plane as the vertices of the LED light beads.

[0020] In summary, the backlight module for Mini LED and its fixing structure of the present invention are capable of enhancing the overall thermal dissipation performance, and facilitating the installation and removal operation of the backlight module 100, thereby improving the product quality and extending the service life of the product. BRIEF DESCRIPTION OF DRAWINGS

[0021] To describe the embodiments of the technical disclosure of embodiments of the present invention more clearly, the drawings to be used in the embodiments will be simply described below:

[0022] Fig. 1 is a partial structural exploded schematic diagram of the backlight module of the present invention; 2025204564   18 Jun 2025

[0023] Fig. 2 is a schematic diagram (I) of the structure of the base shown in Fig. 1;

[0024] Fig. 3 is a schematic diagram (II) of the structure of the base shown in Fig. 1;

[0025] Fig. 4 is a partial sectional view of the base of the present invention;

[0026] Fig. 5 is a partial sectional view of the backlight, the light guide plate, and the optical film shown in Fig. 1;

[0027] Fig. 6 is an exploded schematic diagram of the module fixing structure of the present invention;

[0028] Fig. 7 is a schematic diagram of the structure of the outer frame and the base shown in Fig. 6;

[0029] Fig. 8 is a schematic diagram of the structure of the first inner bracket and the second inner bracket shown in Fig. 6;

[0030] Fig. 9 is a cooperation relationship schematic view between the first inner bracket, the second inner bracket and the optical film. DETAILED DESCRIPTIONS OF THE EMBODIMENTS

[0031] To facilitate understanding of the present invention, technical solutions of the embodiments will be described in a more comprehensive way in connection with the drawings related to the embodiments of the disclosure. The skilled in the art can easily obtain other advantages and effects from the disclosure in the specification. It should be understood that the structure, ratio, size as presented in the drawing of the description are only be used to match with the disclosed in the specification for the understanding and reviewing for the skilled in the art, and not used to limit the implementation of the present invention, and therefore do not have any technical significance, and any other structural modification, changes in proportion or adjustment of the size of the structure shall fall within the protection scope of the present invention, under the condition that, the efficacy of the present invention and the purpose are not affected. Meanwhile, the terms “on”, “under”, “left”, “right”, “between” or the like are used only for the purpose of clarity, and are not intended to limit the scope of implementation of the present invention, or to change or adjust the relative relationship thereof. In absence of substantive changes in the technical disclosure, it shall be also considered to fall within the protection scope of the present invention.

[0032] Unless otherwise defined, all the technical and scientific terms used herein have the same meanings as commonly understood by the skilled in the art to which the present disclosure belongs. The terms used in the description of the present disclosure are not intended to limit the present invention, but to describe the embodiment. The terms, such as “and / or”, includes any and all 2025204564   18 Jun 2025 combinations of one or more related listed items.

[0033] The present invention discloses a backlight module 100 for Mini LED, according to Fig.1 and 2, which comprises: a backlight 110, a base 120, a light guide plate 130 and an optical film 140, wherein a receiving cavity 121 is provided in the base 120 and the backlight 110 is arranged in the receiving cavity 121.

[0034] As shown in Fig. 2, Fig. 3 and Fig. 4, a concave-arched platform 122 is arranged in the receiving cavity 121 of the base 120, and a recessed structure 123 is formed at corresponding position on the bottom surface of the base 120, wherein a plurality of protruding ribs 124 are arranged at the recess 123. The arrangement of protruding ribs 124 could not only guarantee the flatness of the concave-arched platform 122, but also improve the effective thermal dissipation area of the recessed structure 123. Concrete design principles will be described below.

[0035] As shown in Fig. 5, the backlight 110 comprises a substrate 111 and a plurality of LED lamp beads 112 arranged on the substrate 111. The substrate 111 is attached to the concave-arched platform 122, with LED lamp beads 112 face toward an opening direction of the receiving cavity 121. The light guide plate 130 and the optical film 140 are sequentially stacked on the LED lamp beads 112 of the backlight 110.

[0036] In this embodiment, the LED lamp beads 112 are arranged in an array on the substrate 111, wherein each LED lamp beads 112 has a size less than or equal to 500 micrometer(s), and a center-to-center distance between adjacent LED lamp beads 112 is less than or equal to 1,000 micrometer(s).

[0037] Preferably, as shown in Fig. 5, LED lamp beads 112 comprises light emitting chips 113 and colloid 114, the light emitting chips 113 is weld to the substrate 111, the colloid 114 covers the light emitting chips 113 and the colloid 114 has light transmitting structure. The sections of colloid 114 comprise, but are not limited to one or a combination of one or more of a spherical shape, a conical shape, a truncated conical shape, and a conical curve shape, wherein an edge of the colloid is spaced apart from the light emitting chip by 50 - 200 micrometer(s).

[0038] During operation, the light emitting chip 113 of the LED light beads 112 is powered to emit light, and the light emitted is radiated through the colloid 114 radially in all directions. During such period, the thermal generated by the LED light beads 112 is transferred to the substrate 111. Since the substrate 111 is attached to the concave-arched platform 122 of the base 120, the thermal will be further transferred to the base 120, and ultimately dissipated to the outside world.

[0039] In a conventional backlight module, the substrate 111 is directly attached to the base 120 for 2025204564   18 Jun 2025 thermal dissipation, and due to the low flatness of the bottom of the base 120, the substrate 111 cannot be completely attached, and there is a gap between the substrate 111 and the base 120, such conventional thermal dissipation will result in low thermal transfer efficiency. In contrast, in the present invention, the concave arched platform 122 and the corresponding recess 123 are formed on the base 120, by which the concave arched platform 122 is attached to the substrate 111, so that the backlight 110 has a tendency to be pressed down and the concave arched platform 122 has a tendency to be bulged up after assembling, which enables the substrate 111 to be more closely adhered to the inwardly arched platform 122, and thus the voids are reduced. Moreover, the present invention is also provided with a projecting strip 124 at the recessed structure 123. On the one hand, the projecting strip 124 enhances the strength of the concave arched platform 122 (recessed structure 123) to avoid bending and deformation thereof, thereby ensuring flatness. On the other hand, it also increases the surface area of the side of the recess 123, thereby increasing an effective thermal dissipation area, and is capable of realizing more efficient thermal dissipation.

[0040] In this embodiment, the base 120 is an aluminum-based material structure, and an insulating thermally conductive silicone grease is provided between the concave-arched platform 122 and the substrate 111, which is able to fill out the gap that may exist between the two planes of the substrate 111 and the concave-arched platform 122, and the insulating thermally conductive silicone grease has excellent thermal conductivity and good electrical insulation properties, which can quickly transfer the thermal from the substrate 111 to the base 120, thereby improving the thermal dissipation performance of the LED light beads 112.

[0041] In this embodiment, as shown in Fig. 5, the optical film 140 is composed of a lower diffusion film 141, a brightness enhancement film 142, and an upper diffusion film 143 which are stacked in sequence, the lower diffusion film 141 is attached to the light guide plate 130, and the lower diffusion film 141 is proximate to the backlight 110. During operation, the LED lamp beads 112 are energized to emit light and the light rays irradiate to the light guide plate 130, and the light rays are refracted and more nearly vertically irradiated upward by the action of the light guide plate 130. Under the action of the light guide plate 130, the light will be refracted and directed upward more nearly vertically. The light then passes through the lower diffusion film 141, the brightness enhancement film 142, and the upper diffusion film 143 in sequence.The surface of the lower diffusion film 141 and the upper diffusion film 143 has a number of particles, and through the size of the particles of the arc surface, so that the light has a larger diffusion angle, thus eliminating the Newton's ring as far as 2025204564   18 Jun 2025 possible, reducing the optical interference fringes, and making the light output more uniform. The main function of the brightness enhancement film 142 includes enhancing the utilization rate of light and converting a line light source into a surface light source, so that the light spreads in the direction of the front of the screen, and can widen the screen viewing angle and balance the intensity of the light source.

[0042] Furthermore, in practice, glue is usually applied to the edges of the optical film 140 for adhesive fixation with the frame. Due to differences of proficiency of staff, the optical film 140 is tend to have problems regarding improper dimensional clearance during installation. For example, when the gap is too small, the edges of the optical film 140 are prone to be squeezed and caused to bulge, resulting in the appearance of a halo; when the gap is too large, the edges of the optical film 140 are prone to be de-glued, which in turn results in the optical film 140 wobbling. Moreover, the use of the glue connection method makes the backlight module 100 cumbersome to operate during subsequent maintenance and removal, and it is also easy to tear the optical film 140 during removal, which in turn causes wrinkles or breakage, affects subsequent use.

[0043] To solve the above-identified technical problems, the present invention also provides a module fixing structure 10, as shown in Fig. 6, which comprises not only the above-mentioned backlight module 100, but also: a first inner bracket 200, a second inner bracket 300, an outer frame 400, and a positioning plug (not shown in the figure).

[0044] The first inner bracket 200 and the second inner bracket 300 are both slidably disposed in the receiving cavity 121, and both of them are slidably approach to each other to clamp the light guide plate 130 and the optical film 140.

[0045] The outer frame 400 is covered on the receiving cavity 121 of the base 120, and the outer frame 400 is provided with a light exit window 410 (as shown in Fig. 6). The side wall of the outer frame 400 and the base 120 are both provided with waist-shaped through holes 401 (as shown in Fig. 2 and 7), and both waist-shaped through holes 401 correspond to each other. As shown in Fig. 8, the first inner bracket 200 and the second inner bracket 300 are both provided with an extension arm 210, on the extension arm 210 is provided with a slider 211, which is housed in the waist-shaped through-hole 401 of the base 120.

[0046] The extension arm 210 is also provided with a projecting stud 212, which is housed in the waist-shaped through-hole 401 of the base 120, and the positioning plug is adapted to the projecting stud 212. When the positioning plug is sleevedly provided on the projecting stud 212, the edge of the 2025204564   18 Jun 2025 positioning plug will be held against the inner wall of the waist-shaped through-hole 401, thereby limiting the sliding of the first inner bracket 200, the second inner bracket 300.

[0047] The installation and removal steps of the module fixing structure 10 are described as below:

[0048] When being installed, the first inner bracket 200 and the second inner bracket 300 are first placed in the receiving cavity 121, and then the backlight 110, the light guide plate 130, and the optical film 140 are installed in sequence, at that time, the first inner bracket 200 and the second inner bracket 300 form a half-surrounded structure to the optical film 140. Specifically, as shown in Fig. 9, the first inner bracket 200 and the second inner bracket 300 are wrapped around the short edge on both sides of the optical film 140. Initially, there is still a larger gap between the inner walls of the first inner bracket 200 and the second inner bracket 300 and the short edges of the optical film 140; After the optical film 140 is flatly laid and positioned, the personnel pushes the first inner bracket 200 and the second inner bracket 300 to slide towards the center, so as to cause the first inner bracket 200 and the second inner bracket 300 to both fit the edges of the optical film 140, and to eliminate the above-described gaps. In this way, the periphery of the optical film 140 is to be held against, and can be stably confined to the current position even without the use of glue. Finally, the outer frame 400 is capped on the base 120 and the positioning plugs are plugged on the projecting stud 212, which will expand and squeeze the inner wall of the waist-shaped through holes 401, thereby preventing the first inner bracket 200 and the second inner bracket 300 from sliding, and the outer frame 400 from being detached. In this way, the positions of the first inner bracket 200 and the second inner bracket 300 are fixed, and the module fixing structure 10 forms an integral whole; when removal, the personnel first removes the positioning plugs, and then the above steps can be reversed subsequently.

[0049] Compared with the use of glue sticking and fixing in the state of art, the present invention uses the first inner bracket 200 and the second inner bracket 300 to hold against the edge of the optical film 140, which, in addition to having the same position limiting effect, also has the following features and beneficial effects:

[0050] First, during subsequent maintenance and removal, the optical film 140 can be easily removed by simply opening the first inner bracket 200 and the second inner bracket 300. In such way, without glue sticking, the optical film 140 can be avoided from being torn in the removal process, so it is less likely to cause wrinkles or breakage, and there will not be a problem of glue aging;

[0051] Secondly, the manner of the present invention can adaptively adjust the dimensional gap of the optical film 140 at the time of installation, and by sliding the first inner bracket 200 and the second 2025204564   18 Jun 2025 inner bracket 300, it is able to change the size of this gap. This means that the problem of inappropriate dimensional clearance will no longer occur during installation, even if the proficiency of the staff is lacking;

[0052] Thirdly, the operation method of the present invention is also capable of simultaneous centering operation. The staff only needs to slide the first inner holder 200 and the second inner holder 300 to clamp the optical film 140 in a central position, and even if the position of the optical film 140 is initially placed in a deviated position, the centering operation of the optical film 140 can be completed during this clamping process, so that the optical film 140 can be placed in a predetermined position, which ensures a standardized product quality.

[0053] In one embodiment, as shown in Fig. 8, the first inner bracket 200 and the second inner bracket 300 are provided with a plurality of elevating blocks 201, the position of the elevating blocks 201 corresponds to the short edges of the optical film 140. Moreover, the vertices of the elevating blocks 201 are at the same plane as the vertices of the LED light beads 112.

[0054] It should be described additionally that the elevating blocks 201 is provided to give a supporting effect to the short side of the optical film 140. Since the long side of the optical film 140 has a large span, this makes the short side positions at both ends of the optical film 140 prone to bending and sagging, resulting in a poor flatness, which in turn affects the light output effect. The setting of the elevating blocks 201 equals to give the short edges of the optical film 140 a step that can be relied upon, thereby eliminating the sagged phenomenon of its edges as much as possible, so that its overall flatness is higher. Undoubtably, the size of the elevating blocks 201 needs to be as tiny as possible so as to avoid causing serious shading, which results in noticeable shadows on the lightemitting surface.

[0055] In summary, the backlight module 100 for Mini LED and its fixing structure 10 of the present invention are capable of improving the overall thermal dissipation capability, and facilitating the installation and removal operation of the backlight module 100, thereby improving the product quality and extending the service life of the product.

[0056] The embodiments described above are only exemplary embodiments of the present invention, which are described relative specific and in detail. However, the protection scope of the present invention is not intended to be limited thereto. It should be pointed out that, for one of ordinary skill in the art, various changes and alternations may be made without departing from the technical scope of the present disclosure, and all of these changes and alternations shall fall within the scope of the 2025204564   18 Jun 2025 present disclosure. Hence, the protection scope of the present invention shall be defined by the claims.

Claims

1. A module fixing structure for a backlight module for Mini LED, characterized in that, the backlight module comprises: a backlight, a base, a light guide plate and an optical film, wherein the base comprises a receiving cavity, and the backlight is disposed in the receiving cavity,a concave-arched platform is integrally formed at a side of the receiving cavity of the base, and the concave-arched platform is formed as being concaved toward the receiving cavity, so that a recessed structure is formed at an outer side of the concave-arched platform, and the outer side is away from the receiving cavity and forms a bottom surface of the base,wherein a plurality of protruding ribs are formed at the recessed structure,wherein the backlight comprises a substrate and a plurality of LED lamp beads arranged on the substrate,wherein the substrate is attached to the concave-arched platform, and the LED lamp beads face toward an opening direction of the receiving cavity, and an insulating thermally conductive silicone grease is disposed between the concave-arched platform and the substrate,wherein the light guide plate and the optical film are stacked on the LED lamp beads of the backlight,wherein the module fixing structure further comprises a first inner bracket, a second inner bracket, an outer frame, and a positioning plug,wherein the first inner bracket and the second inner bracket are both slidably disposed in the receiving cavity, and configured to slidably approach each other so as to clamp the light guide plate and the optical film,wherein the first inner bracket and the second inner bracket form a semi-enclosed structure around the light guide plate and the optical film, before the first inner bracket and the second inner bracket are slid to clamp the light guide plate and the optical film, a gap exists between inner walls of the first and second inner brackets and the short edges of the light guide plate and the optical film; by pushing the first inner bracket and the second inner bracket to slide toward each other, the gap is eliminated, and the optical film is thereby centered and held in position,wherein the outer frame is detachably covered on the receiving cavity of the base and the outer frame is formed with a light exit window,wherein the side walls of the outer frame and the base are each provided with waist-shaped2025204564   04 Jun 2026through holes that are aligned with each other, wherein the first inner bracket and the second inner bracket are each provided with an extension arm, wherein the extension arm is provided with a slider, which is housed in the waist-shaped through-hole of the base,wherein the extension arm is also provided with a projecting stud, which is housed in the waistshaped through-hole of the base, and the positioning plug is adapted to the engage with the projecting stud, wherein when the positioning plug is sleeved provided on the projecting stud, an edge of the positioning plug will be held against the inner wall of the waist-shaped through-hole, thereby limiting the sliding of the first inner bracket, the second inner bracket, and the outer frame could not be separated.

2. The module fixing structure for a backlight module for Mini LED according to claim 1, characterized in that, the first inner bracket and the second inner bracket are each provided with a plurality of elevating blocks, wherein the positions of the elevating block correspond to the short edges of the optical film, the vertices of the elevating blocks are at the same plane as the vertices of the LED light beads.

3. The module fixing structure for a backlight module for Mini LED according to claim 1, characterized in that, the base is an aluminum-based material structure.

4. The module fixing structure for a backlight module for Mini LED according to claim 1, characterized in that, the LED lamp beads are arranged in an array on the substrate, wherein each LED lamp beads has a size less than or equal to 500 micrometer(s), and a center-to-center spacing between adjacent LED lamp beads is less than or equal to 1,000 micrometer(s).

5. The module fixing structure for a backlight module for Mini LED according to claim 4, characterized in that, the LED lamp beads comprise a light emitting chip and a colloid, the light emitting chips are weld to the substrate, the colloid covers the light emitting chips and the colloid has light transmitting structure.

6. The module fixing structure for a backlight module for Mini LED according to claim 5, characterized in that, a cross-sectional profile of the colloid comprises, but is not limited to one or a combination of a spherical shape, a conical shape, a truncated conical shape, and a conical curve shape, wherein an edge of the colloid is spaced apart from the light emitting chip by 50 - 200 micrometer(s).

7. The module fixing structure for a backlight module for Mini LED according to claim 1, characterized in that, the optical film is composed of a lower diffusion film, a brightness enhancement2025204564   04 Jun 2026film, and an upper diffusion film which are stacked in sequence, wherein the lower diffusion film is attached to the light guide plate, and the lower diffusion film is proximate to the backlight.

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