Mini LED backlight module with biprism layer and display device

Abstract

The Mini LED backlight module comprises a backlight module body, the backlight module body is composed of an optical layer, the biprism layer, a lamp panel and a back plate which are sequentially stacked from top to bottom, a horizontal heat conduction area is arranged on the back face of the back plate, the horizontal heat conduction area comprises a plurality of sunken heat conduction concave faces, and the heat conduction concave faces are arranged in the horizontal heat conduction area. The adjacent heat-conducting concave surfaces are connected through sunken communicating concave surfaces; heat conduction through holes are formed in the positions between the adjacent horizontal heat conduction areas, and the peripheries of the heat conduction through holes are coated with annular concave faces. The heat conduction concave surface, the communication concave surface and the annular concave surface are filled with a metal composite material formed by compounding aluminum particles and resin; and the metal composite material filled in the heat-conducting concave surface protrudes out of the back surface of the back plate. The backlight module has the following advantages and effects that the heat dissipation module is innovatively designed to be of a detachable structure, so that a user does not need to fully disassemble the backlight module during maintenance, and silicone grease replacement can be carried out only by easily disassembling the heat dissipation module.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a Mini LED backlight module and a display device arranged with a double prism layer. Background Art

[0002] In recent years, Mini LED backlight technology has attracted widespread attention due to its outstanding performance in display effects. This technology assembles smaller LED light sources together to achieve high brightness, high contrast and wide color gamut display effects, and has become a popular choice for high-end display products such as TVs, computer monitors and mobile devices. However, in actual applications, Mini LED backlight modules generate a lot of heat during operation. If the heat cannot be dissipated in a timely and effective manner, it will lead to a series of serious problems, including reduced LED luminous efficiency, color distortion, and shortened service life.

[0003] In Mini LED backlight modules, due to their compact structure, high-density LED arrangement causes heat accumulation, resulting in temperature rise. Long-term high-temperature operation will not only cause the light decay of the LED light source and reduce its performance, but may also cause the aging of the internal materials of the backlight module, leading to the degradation of optical and mechanical properties. Therefore, good heat dissipation design is particularly important. Common heat dissipation measures include the use of thermal conductive materials and the configuration of heat dissipation devices.

[0004] When the thermal conductive medium (such as silicone grease) of the heat dissipation module fails or ages due to high temperature, it is often necessary to dismantle the entire backlight module for replacement. This process is not only time-consuming and labor-intensive, but may also increase the risk of equipment failure and maintenance costs.

[0005] As an important thermal conductive medium, the quality of silicone grease directly affects the heat dissipation performance. Highly efficient thermal conductive silicone grease can effectively reduce the thermal resistance of the heat dissipation interface and improve the overall heat dissipation efficiency. However, with the passage of time, temperature changes and normal use, silicone grease will gradually lose its thermal conductivity and form a thermal barrier. In this case, timely replacement of silicone grease can not only restore the heat dissipation performance, ensure the stability and luminous efficiency of the LED, but also extend the overall service life of the module.

[0006] Therefore, providing a simple silicone grease replacement solution can not only reduce the complexity of maintenance, but also increase user participation in equipment maintenance and improve user experience. In the Mini LED backlight module and display device with a dual prism layer set up proposed by the present invention, the heat dissipation module is innovatively designed as a detachable structure, so that users do not need to completely disassemble the backlight module during maintenance, but only need to easily disassemble the heat dissipation module to replace the silicone grease. This design significantly improves the convenience and efficiency of maintenance, which is of great significance to improving the market competitiveness of Mini LED backlight modules. Summary of the invention

[0007] The purpose of the present invention is to provide a Mini LED backlight module and a display device with a dual prism layer arrangement to solve the problems raised in the background technology.

[0008] The above technical objectives of the present invention are achieved through the following technical solutions: In order to achieve the above-mentioned object, the present invention provides a Mini LED backlight module with a double prism layer, including a backlight module, wherein the backlight module is composed of an optical layer, a double prism layer, a light board and a backboard stacked in sequence from top to bottom; a plurality of horizontal heat conduction areas are regularly arranged on the back of the backboard, each of the horizontal heat conduction areas includes a plurality of sunken heat conduction concave surfaces, and adjacent heat conduction concave surfaces are connected by sunken connecting concave surfaces; the backboard is made of aluminum; A plurality of heat-conducting through holes penetrating the front and back surfaces of the back plate are arranged between adjacent horizontal heat-conducting areas, and the outer periphery of each heat-conducting through hole is covered with an annular concave surface; Each of the heat-conducting concave surface, the connecting concave surface and the annular concave surface is filled with a metal composite material formed by combining aluminum particles and resin; the metal composite material filled in each of the heat-conducting concave surfaces will protrude from the back of the back plate.

[0009] A further configuration is that the center distance between two heat-conducting concave surfaces located on the same vertical axis in two adjacent horizontal heat-conducting zones is 30 mm; the center distance between two adjacent heat-conducting concave surfaces located in the same horizontal heat-conducting zone is 27 mm.

[0010] In order to achieve the above object, the present invention further provides a display device, comprising a receiving carrier, wherein the backlight module is fixed inside the receiving carrier by screws; A hollow heat dissipation chamber is provided inside the accommodating carrier, and the heat dissipation chamber is located on the back of the backlight module. A heat dissipation module is detachably inserted in the heat dissipation chamber, and the heat dissipation module includes a heat dissipation seat, and a plurality of silicone grease application areas are arranged on the heat dissipation seat.

[0011] The further configuration is as follows: a plurality of sunken horizontal heat dissipation areas are provided on the front of the heat dissipation seat, and adjacent horizontal heat dissipation areas are connected by sunken auxiliary concave surfaces; a plurality of silicone grease application areas are provided in each of the horizontal heat dissipation areas, and each of the silicone grease application areas is coated with silicone grease; a heat-conducting copper sheet is clamped on the front of the heat dissipation seat, and the heat-conducting copper sheet is in a continuously bent shape. After the heat-conducting copper sheet is clamped on the front of the heat dissipation seat, it will be hidden in each horizontal heat dissipation area and each auxiliary concave surface, and cover each of the silicone grease application areas; After the heat sink is inserted into the heat sink cavity, the heat conductive copper sheet will contact each metal composite material filled in the heat conductive concave surface.

[0012] A further configuration is that: the number of the horizontal heat dissipation zones is consistent with the number of the horizontal heat conduction zones, and the number of the silicone grease coating zones is consistent with the number of the heat conduction concave surfaces; after the heat sink is inserted into the heat dissipation chamber, each of the horizontal heat dissipation zones will correspond to the position of each horizontal heat conduction zone, and each of the silicone grease coating zones will correspond to the position of each heat conduction concave surface.

[0013] Further configuration is that: the bottom of the receiving carrier is provided with a double-sided locking structure for locking the heat sink inserted into the heat sink chamber, and the double-sided locking structure is composed of two single-sided locking structures symmetrically arranged along the central axis of the heat sink chamber; An extended base is fixedly arranged at the bottom of the heat sink, a bottom slot for the extended base to abut against is provided at the bottom of the accommodating carrier, and two locking inner holes are provided in the extended base. When the extended base abuts against the bottom slot, the two unilateral locking structures will respectively extend into the two locking inner holes and lock the extended base together, so that the heat sink is stably fixed in the accommodating carrier; after the heat sink is fixed in the accommodating carrier, the thermally conductive copper sheet will contact each metal composite material filled in the thermally conductive concave surface.

[0014] A further configuration is that: the unilateral locking structure includes a unilateral inner shell fixed in a containing carrier, the unilateral inner shell has a transverse unilateral inner hole, a locking action block is movably arranged in the unilateral inner hole, a locking inner concave surface is provided on the outer side of the locking inner hole, the locking action block can enter into the locking inner concave surface to achieve the purpose of locking the extended base, and a first built-in spring is provided in the unilateral inner hole to apply an outward force to the locking action block so that it can enter into the locking inner concave surface; the upper end of the outer side of the locking action block has a curved surface, and the curved surface can contact with the extended base that is pressed into the bottom groove and automatically avoid it due to force.

[0015] The further configuration is as follows: a retraction action block is also movably arranged in the unilateral inner hole, the locking action block is located on the outside of the retraction action block, the locking action block and the retraction action block form a whole that moves together through the first coordination block, the upper end of the first coordination block, the locking action block and the lower end of the retraction action block are respectively attached to the upper and lower walls of the unilateral inner hole, so that the locking action block and the retraction action block can maintain lateral movement; a first blocking block is fixedly arranged on the upper end of the inner side of the unilateral inner hole, the first blocking block is located on the inner side of the first coordination block, and the first built-in spring is located between the first blocking block and the first coordination block; the spacing between the first blocking block and the lower wall of the unilateral inner hole is greater than or equal to the longitudinal cross-sectional width of the retraction action block; The lower end of the retracting action block has an oblique sub-retracting surface; The unilateral inner shell has a retraction control cavity, which is located below the unilateral inner hole. A retraction action shaft is movably arranged in the retraction control cavity. The retraction action shaft performs longitudinal reciprocating movement in the retraction control cavity. The upper end of the retraction action shaft has a mother retraction surface with the same slope as the child retraction surface. It only needs to control the retraction action shaft to move upward, and as the mother retraction surface contacts the child retraction surface, the retraction action block can be driven to move inward. The unilateral inner shell is provided with an inner connecting hole which connects the unilateral inner hole and the retraction control cavity so as to allow the retraction action axis to move longitudinally.

[0016] Further configuration is as follows: a second cooperation block is fixedly arranged inside the retraction action shaft; a second blocking block is fixedly arranged at the lower end of the retraction control cavity, and the second cooperation block can contact with the second blocking block to avoid separation; a second built-in spring is arranged between the upper wall of the retraction control cavity and the second cooperation block to apply downward force to the retraction action shaft, and the retraction action shaft maintains a state that does not hinder the locking action block from moving outward; A wide pressing block which is wider than its own transverse cross-section width is fixedly arranged at the lower end of the retraction action shaft, and the wide pressing block can perform longitudinal reciprocating movement in the retraction control cavity; the retraction action shaft can be controlled to move upward by pressing the wide pressing block.

[0017] A further configuration is as follows: an inner partition is formed between the two single-sided inner shells, the extended base has a central block extending into the inner partition, and a third built-in spring is compressed between the central block and the bottom of the accommodating carrier; after the two locking action blocks respectively enter the two locking concave surfaces to lock the extended base, the third built-in spring is in a compressed state; the central block can also abut against the retracting action block to prevent the first built-in spring and the second built-in spring from being over-pressurized and unable to return to their original state.

[0018] The present invention has the following beneficial effects: 1. In the present invention, the back panel is made of aluminum, which has good thermal conductivity and light weight; by filling the heat-conducting concave surface on the back of the back panel with a metal composite material, the metal composite material is formed by a composite of aluminum particles and resin, and has the following advantages: ① It can effectively protect the aluminum particles and improve the corrosion resistance of the composite material, which makes the composite material perform better in a humid or corrosive environment, thereby extending the service life; ② Reduce costs, the composite material can reduce the cost of raw materials and processing through processes such as molding; the setting of heat dissipation perforations can better achieve the thermal balance of the front and back sides of the back panel; the connecting concave surface can achieve the thermal balance between adjacent heat-conducting concave surfaces. The metal composite materials filled in the heat-conducting concave surface will all protrude from the back of the back panel. The purpose of this setting is to ensure that it can maintain contact with the heat sink and reduce the friction generated during the insertion process of the heat sink.

[0019] 2. In the present invention, the center distance between two adjacent heat-conducting concave surfaces in the same horizontal heat-conducting area is 27 mm, which helps to achieve an ideal heat conduction path between the heat-conducting concave surfaces, avoid the occurrence of hot spots, ensure that the heat is more evenly distributed on the back panel, and help to extend the service life of the equipment; the center distance between two heat-conducting concave surfaces located on the same vertical axis in two adjacent horizontal heat-conducting areas is 30 mm, which can reduce the thermal stress caused by temperature changes in the material, reduce the aging and fatigue of the material caused by thermal cycles, and improve the reliability of the material.

[0020] 3. In the present invention, the carrier is used to install and fix the backlight module, and the heat dissipation chamber is used to insert the heat dissipation module. The heat dissipation module is detachable and can be easily removed to replace the silicone grease in the silicone grease coating area. This avoids the disadvantage of directly applying silicone grease on the back panel, which makes it difficult to replace the integrated device. When the silicone grease needs to be replaced, it is only necessary to remove the heat dissipation module and reapply the heat dissipation silicone grease, which is very convenient.

[0021] 4. In the present invention, the horizontal heat dissipation area and the auxiliary concave surface are set to provide hidden assembly of the thermally conductive copper sheet; the sunken silicone grease coating area is provided with silicone grease, and the thermally conductive copper sheet can contact with the silicone grease to conduct heat, and the silicone grease can also be protected to prevent the silicone grease from being scratched.

[0022] 5. In the present invention, each horizontal heat dissipation area will correspond to the position of each horizontal heat conduction area, which can better contact and conduct heat; each silicone grease application area will correspond to the position of each heat conduction concave surface, which can better dissipate heat from the hot spot.

[0023] 6. In the present invention, the bilateral locking structure is composed of a unilateral locking structure, and the two unilateral locking structures can achieve bilateral locking, thereby improving the stability after locking; the thermally conductive copper sheet can contact each metal composite material filled in the thermally conductive concave surface, thereby achieving heat transfer based on contact heat conduction.

[0024] 7. In the present invention, the locking action block in the single-sided inner shell can move outward and enter into the locking inner concave surface to achieve the purpose of locking the extended base. The first built-in spring applies an outward force to the locking action block; the setting of the curved surface can contact with the extended base that is pressed into the bottom groove and automatically avoid it due to the force.

[0025] 8. In the present invention, the retraction action block and the locking action block form a jointly movable whole through the first cooperative block, and the locking action block can move laterally in the unilateral inner hole; the first blocking block provides bearing force for the inner side of the first built-in spring, and the space between the first blocking block and the first cooperative block is for the first built-in spring to be placed; the spacing between the first blocking block and the lower wall of the unilateral inner hole is greater than or equal to the longitudinal cross-sectional width of the retraction action block to avoid hindering the inward movement of the retraction action block; it is only necessary to control the retraction action axis to move upward, and as the mother retraction surface contacts the child retraction surface, the retraction action block can be driven to move inward, and the internal connecting hole allows the retraction action axis to move longitudinally.

[0026] 9. In the present invention, the second cooperative block on the inner side of the retracting action shaft can contact with the second blocking block to avoid disengagement, and the second built-in spring can apply a downward force to the retracting action shaft, so that the retracting action shaft maintains a state that does not hinder the outward movement of the locking action block; the setting of the wide pressing block can expand the contact width of the operator, making it convenient for the operator to apply force to press the wide pressing block.

[0027] 10. In the present invention, the extension base has a central block extending into the inner compartment, and the central block contacts the third built-in spring; after the two locking action blocks respectively enter the two locking inner concave surfaces to lock the extension base, the third built-in spring is in a compressed state; after the two locking action blocks respectively escape from the two locking inner concave surfaces, the central block can be quickly pushed up by the third built-in spring and then escape from the heat dissipation chamber. The central block can also abut against the retracting action block to prevent the first built-in spring and the second built-in spring from being over-pressurized and unable to return to their original state. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of the structure of the back plate in the embodiment; Figure 2 This is a schematic diagram of an assembly structure for accommodating a carrier and a heat dissipation module in an embodiment; Figure 3 Schematic diagram of the structure of the heat-conducting copper sheet in the embodiment; Figure 4 for Figure 2 Enlarged view of part A in the middle.

[0029] In the figure: 11, back plate; 12, heat conduction concave surface; 13, connecting concave surface; 14, heat conduction perforation; 141, annular concave surface; 21, accommodating carrier; 22, heat dissipation chamber; 31, heat dissipation seat; 311, snap-on groove; 32, horizontal heat dissipation area; 33, auxiliary concave surface; 34, silicone grease coating area; 41, heat conduction copper sheet; 411, snap-on protrusion; 51, extended base; 52, bottom slot; 53, locking inner hole; 531, locking inner concave surface; 61, single-sided inner shell; 62, Unilateral inner hole; 63, locking action block; 631, curved surface; 64, first built-in spring; 65, retraction action block; 651, sub-retraction surface; 66, first coordination block; 67, first blocking block; 71, retraction control chamber; 72, retraction action axis; 721, mother retraction surface; 73, inner connecting hole; 74, second coordination block; 75, second blocking block; 76, second built-in spring; 77, wide pressure block; 81, inner partition area; 82, center block; 83, third built-in spring. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0031] As attached Figures 1 to 4As shown; The present embodiment discloses a Mini LED backlight module with a dual prism layer arrangement, including a backlight module, which is composed of an optical layer, a dual prism layer, a light board and a back board 11 stacked in sequence from top to bottom; the optical layer, the dual prism layer and the light board are all conventional structures and belong to the prior art field.

[0032] The back of the back plate 11 is regularly provided with a plurality of horizontal heat conduction areas, and the number of the horizontal heat conduction areas is 5; each horizontal heat conduction area includes a plurality of sunken heat conduction concave surfaces 12, and adjacent heat conduction concave surfaces 12 are connected by sunken connecting concave surfaces 13; the back plate 11 is made of aluminum; A plurality of heat-conducting through holes 14 penetrating the front and back surfaces of the back plate 11 are arranged between adjacent horizontal heat-conducting areas. The number of the heat-conducting through holes 14 is 34. The outer periphery of each heat-conducting through hole 14 is covered with an annular concave surface 141. Each of the heat-conducting concave surface 12 , the connecting concave surface 13 and the annular concave surface 141 is filled with a metal composite material formed by combining aluminum particles and resin; the metal composite material filled in each of the heat-conducting concave surfaces 12 will protrude from the back of the back plate 11 .

[0033] The center distance between two heat-conducting concave surfaces 12 located on the same vertical axis in two adjacent horizontal heat-conducting areas is 30 mm; the center distance between two adjacent heat-conducting concave surfaces 12 located in the same horizontal heat-conducting area is 27 mm.

[0034] This embodiment also discloses a display device, including a receiving carrier 21, and a backlight module is fixed inside the receiving carrier 21 by screws; A hollow heat dissipation chamber 22 is provided inside the accommodating carrier 21. The heat dissipation chamber 22 is located on the back of the backlight module. A heat dissipation module is detachably inserted in the heat dissipation chamber 22. The heat dissipation module includes a heat dissipation seat 31. A plurality of silicone grease coating areas 34 are arranged on the heat dissipation seat 31. The number of the silicone grease coating areas 34 is the same as the number of the thermal conductive concave surfaces 12, both of which are 50.

[0035] Among them, a plurality of sunken horizontal heat dissipation areas 32 are provided on the front of the heat dissipation seat 31, and adjacent horizontal heat dissipation areas 32 are connected by sunken auxiliary concave surfaces 33; each horizontal heat dissipation area 32 is provided with a plurality of silicone grease coating areas 34 sunken again, and each silicone grease coating area 34 is coated with silicone grease; a heat conductive copper sheet 41 is clamped on the front of the heat dissipation seat 31, and the heat conductive copper sheet 41 is in a continuously bent shape. After the heat conductive copper sheet 41 is clamped on the front of the heat dissipation seat 31, it will be hidden in each horizontal heat dissipation area 32 and each auxiliary concave surface 33, and cover each silicone grease coating area 34; It should be added that four snap-in protrusions 411 are provided on the thermal copper sheet 41 , and snap-in grooves 311 corresponding to the four snap-in protrusions 411 are provided in the heat sink 31 . Each snap-in protrusion 411 and the corresponding snap-in groove 311 are damping-coordinated to limit the thermal copper sheet 41 .

[0036] After the heat sink 31 is inserted into the heat sink chamber 22 , the thermally conductive copper sheet 41 will be in contact with each of the metal composite materials filled in the thermally conductive concave surface 12 .

[0037] Among them, the number of horizontal heat dissipation areas 32 and horizontal heat conduction areas is consistent, and the number of silicone grease coating areas 34 and thermal conductive concave surfaces 12 is consistent; after the heat sink 31 is inserted into the heat dissipation chamber 22, each horizontal heat dissipation area 32 will correspond to the position of each horizontal heat conduction area, and each silicone grease coating area 34 will correspond to the position of each thermal conductive concave surface 12.

[0038] The bottom of the receiving carrier 21 is provided with a double-sided locking structure for locking the heat sink 31 inserted into the heat sink chamber 22, and the double-sided locking structure is composed of two single-sided locking structures symmetrically arranged along the central axis of the heat sink chamber 22; An extended base 51 is fixedly provided at the bottom of the heat sink 31, and a bottom slot 52 is provided at the bottom of the accommodating carrier 21 for the extended base 51 to abut against. Two locking inner holes 53 are provided in the extended base 51. When the extended base 51 abuts against the bottom slot 52, the two unilateral locking structures will respectively extend into the two locking inner holes 53 and lock the extended base 51 together, so that the heat sink 31 can be stably fixed in the accommodating carrier 21; after the heat sink 31 is fixed in the accommodating carrier 21, the thermally conductive copper sheet 41 will contact each metal composite material filled in the thermally conductive concave surface 12.

[0039] Among them, the unilateral locking structure includes a unilateral inner shell 61 fixed in the accommodating carrier 21, and the unilateral inner shell 61 has a transverse unilateral inner hole 62, and a locking action block 63 is movably arranged in the unilateral inner hole 62. A locking inner concave surface 531 is provided on the outer side of the locking inner hole 53, and the locking action block 63 can enter into the locking inner concave surface 531 to achieve the purpose of locking the extended base 51. A first built-in spring 64 is provided in the unilateral inner hole 62 to apply an outward force to the locking action block 63 so that it can enter into the locking inner concave surface 531; the upper end of the outer side of the locking action block 63 has a curved surface 631, and the curved surface 631 can contact with the extended base 51 that is pressed into the bottom groove 52 and automatically avoid it due to force.

[0040] Among them, a retraction action block 65 is also movably arranged in the unilateral inner hole 62, and the locking action block 63 is located on the outside of the retraction action block 65. The locking action block 63 and the retraction action block 65 form a whole that moves together through the first coordination block 66. The upper end of the first coordination block 66 and the lower ends of the locking action block 63 and the retraction action block 65 are respectively attached to the upper and lower walls of the unilateral inner hole 62, so that the locking action block 63 and the retraction action block 65 can maintain lateral movement; a first blocking block 67 is fixedly arranged on the upper end of the inner side of the unilateral inner hole 62, and the first blocking block 67 is located on the inner side of the first coordination block 66, and the first built-in spring 64 is located between the first blocking block 67 and the first coordination block 66; the distance between the first blocking block 67 and the lower wall of the unilateral inner hole 62 is greater than or equal to the longitudinal cross-sectional width of the retraction action block 65; The lower end of the retracting action block 65 has an oblique sub-retracting surface 651; The unilateral inner shell 61 has a retraction control chamber 71, which is located below the unilateral inner hole 62. A retraction action shaft 72 is movably arranged in the retraction control chamber 71. The retraction action shaft 72 performs longitudinal reciprocating movement in the retraction control chamber 71. The upper end of the retraction action shaft 72 has a female retraction surface 721 with the same slope as the sub-retraction surface 651. It is only necessary to control the retraction action shaft 72 to move upward, and as the female retraction surface 721 contacts the sub-retraction surface 651, the retraction action block 65 can be driven to move inward. An inner connecting hole 73 is provided in the single-side inner shell 61 to connect the single-side inner hole 62 and the retraction control cavity 71 so as to allow the retraction action shaft 72 to move longitudinally.

[0041] Among them, a second cooperation block 74 is fixedly arranged on the inner side of the retraction action shaft 72; a second blocking block 75 is fixedly arranged on the lower end of the retraction control chamber 71, and the second cooperation block 74 can contact with the second blocking block 75 to avoid separation; a second built-in spring 76 is arranged between the upper wall of the retraction control chamber 71 and the second cooperation block 74 to apply a downward force to the retraction action shaft 72, and the retraction action shaft 72 maintains a state that does not hinder the locking action block 63 from moving outward; A wide pressing block 77 which is wider than its own transverse cross-section width is fixedly provided at the lower end of the retraction action shaft 72. The wide pressing block 77 can perform longitudinal reciprocating movement in the retraction control cavity 71. The retraction action shaft 72 can be controlled to move upward by pressing the wide pressing block 77.

[0042] Among them, an inner partition 81 is formed between the two single-sided inner shells 61, and the extended base 51 has a central block 82 extending into the inner partition 81, and a third built-in spring 83 is compressed between the central block 82 and the bottom of the accommodating carrier 21; after the two locking action blocks 63 respectively enter the two locking inner concave surfaces 531 to lock the extended base 51, the third built-in spring 83 is in a compressed state; the central block 82 can also abut against the retracting action block 65 to prevent the first built-in spring 64 and the second built-in spring 76 from being over-pressurized and unable to return to their original state.

[0043] When installing the heat dissipation module: 1. Apply silicone grease to each silicone grease application area 34, and then snap the thermal conductive copper sheet 41 onto the front of the heat sink 31. The thermal conductive copper sheet 41 will be hidden in each horizontal heat dissipation area 32 and each auxiliary concave surface 33, and cover each silicone grease application area 34; the thermal conductive copper sheet 41 is flush with the front of the heat sink 31 and is on the same plane.

[0044] 2. Insert the heat sink 31 downward into the heat dissipation chamber 22, and the extended base 51 will move downward to abut against the bottom groove 52. At this time, the thermally conductive copper sheet 41 will contact each metal composite material filled in the thermally conductive concave surface 12. At the same time, each horizontal heat dissipation area 32 will correspond to the position of each horizontal thermally conductive area, and each silicone grease application area 34 will correspond to the position of each thermally conductive concave surface 12, so as to achieve hot spot alignment and balanced heat dissipation.

[0045] 3. The setting of the curved surface 631 can contact with the extended base 51 that is pressed into the bottom groove 52 and automatically avoid the extended base 51 when it is pressed into the bottom groove 52, so that the extended base 51 can smoothly press into the bottom groove 52.

[0046] 4. When the extension base 51 moves downward to abut against the bottom slot 52 , the locking action blocks 63 in the two unilateral locking structures will enter the locking inner concave surface 531 under the outward displacement force applied by the first internal spring 64 to lock the extension base 51 .

[0047] When removing the heat dissipation module: 1. The operator presses two fingers of his hand on the wide pressing block 77 in the two single-sided inner shells 61, and then presses upward. The two retraction action axes 72 will move up. As the parent retraction surface 721 contacts the child retraction surface 651, the two retraction action blocks 65 will be driven to move inward, and the two locking action blocks 63 will move inward accordingly, and then they will be separated from the corresponding locking inner concave surfaces 531 respectively.

[0048] 2. After the two locking action blocks 63 are respectively separated from the two locking inner concave surfaces 531 , the central block 82 can be quickly pushed up by the third internal spring 83 , and then partially separated from the heat dissipation chamber 22 , making it convenient for the operator to pull out the heat dissipation seat 31 .

[0049] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A Mini LED backlight module with a double prism layer, comprising a backlight module, wherein the backlight module is composed of an optical layer, a double prism layer, a light board and a back board (11) stacked in sequence from top to bottom; characterized in that: The back of the back plate (11) is regularly provided with a plurality of horizontal heat conduction areas, each of which includes a plurality of sunken heat conduction concave surfaces (12), and adjacent heat conduction concave surfaces (12) are connected by sunken connecting concave surfaces (13); the back plate (11) is made of aluminum; A plurality of heat-conducting through holes (14) penetrating the front and back surfaces of the back plate (11) are arranged between adjacent horizontal heat-conducting areas, and the outer periphery of each of the heat-conducting through holes (14) is covered with an annular concave surface (141); Each of the heat-conducting concave surface (12), the connecting concave surface (13) and the annular concave surface (141) is filled with a metal composite material formed by a composite of aluminum particles and resin; the metal composite material filled in each of the heat-conducting concave surfaces (12) protrudes from the back side of the back plate (11).

2. The Mini LED backlight module with a dual prism layer arrangement according to claim 1, characterized in that: The center distance between two heat-conducting concave surfaces (12) located on the same vertical axis in two adjacent horizontal heat-conducting zones is 30 mm; the center distance between two adjacent heat-conducting concave surfaces (12) located in the same horizontal heat-conducting zone is 27 mm.

3. A display device, applied to a Mini LED backlight module with a dual prism layer as claimed in any one of claims 1 to 2, characterized in that: It comprises a containing carrier (21), wherein the backlight module is fixed inside the containing carrier (21) by screws; A hollow heat dissipation chamber (22) is provided inside the containing carrier (21), and the heat dissipation chamber (22) is located on the back of the backlight module. A heat dissipation module is detachably inserted in the heat dissipation chamber (22), and the heat dissipation module includes a heat dissipation seat (31), and a plurality of silicone grease application areas (34) are arranged on the heat dissipation seat (31).

4. The display device according to claim 3, characterized in that: The front side of the heat sink (31) is provided with a plurality of sunken horizontal heat sinking areas (32), and adjacent horizontal heat sinking areas (32) are connected by sunken auxiliary concave surfaces (33); each of the horizontal heat sinking areas (32) is provided with a plurality of silicone grease coating areas (34) which are sunken again, and each of the silicone grease coating areas (34) is coated with silicone grease; a heat conductive copper sheet (41) is clamped on the front side of the heat sink (31), and the heat conductive copper sheet (41) is in a continuously bent shape. After the heat conductive copper sheet (41) is clamped on the front side of the heat sink (31), it will be hidden in each horizontal heat sinking area (32) and each auxiliary concave surface (33), and cover each of the silicone grease coating areas (34); After the heat sink (31) is inserted into the heat sink chamber (22), the heat conductive copper sheet (41) will contact each metal composite material filled in the heat conductive concave surface (12).

5. The display device according to claim 4, characterized in that: The number of the horizontal heat dissipation areas (32) is consistent with that of the horizontal heat conduction areas, and the number of the silicone grease application areas (34) and the heat conduction concave surfaces (12) are consistent; after the heat dissipation seat (31) is inserted into the heat dissipation chamber (22), each of the horizontal heat dissipation areas (32) will correspond to the position of each horizontal heat conduction area, and each of the silicone grease application areas (34) will correspond to the position of each heat conduction concave surface (12).

6. The display device according to claim 5, characterized in that: The bottom of the accommodating carrier (21) is provided with a double-sided locking structure for locking a heat sink (31) inserted into the heat sink chamber (22), and the double-sided locking structure is composed of two single-sided locking structures symmetrically arranged along the central axis of the heat sink chamber (22); An extension base (51) is fixedly arranged at the bottom of the heat sink (31), a bottom slot (52) for the extension base (51) to abut against is provided at the bottom of the accommodating carrier (21), and two locking inner holes (53) are provided in the extension base (51). When the extension base (51) abuts against the bottom slot (52), the two unilateral locking structures will respectively extend into the two locking inner holes (53) and lock the extension base (51) together, so that the heat sink (31) is stably fixed in the accommodating carrier (21); after the heat sink (31) is fixed in the accommodating carrier (21), the thermally conductive copper sheet (41) will contact each metal composite material filled in the thermally conductive concave surface (12).

7. The display device according to claim 6, characterized in that: The unilateral locking structure comprises a unilateral inner shell (61) fixed in a accommodating carrier (21), wherein the unilateral inner shell (61) has a transverse unilateral inner hole (62), wherein a locking action block (63) is movably arranged in the unilateral inner hole (62), wherein a locking inner concave surface (531) is provided on the outer side of the locking inner hole (53), wherein the locking action block (63) can enter into the locking inner concave surface (531) to achieve the purpose of locking the extended base (51), wherein a first internal spring (64) is provided in the unilateral inner hole (62) to apply an outward displacement force to the locking action block (63) so that the locking action block (63) can enter into the locking inner concave surface (531); wherein the upper end of the outer side of the locking action block (63) has a curved surface (631), wherein the curved surface (631) can contact with the extended base (51) pressed into the bottom slot (52) and automatically avoid the contact by receiving force.

8. The display device according to claim 7, characterized in that: A retracting action block (65) is also movably arranged in the unilateral inner hole (62), and the locking action block (63) is located outside the retracting action block (65). The locking action block (63) and the retracting action block (65) form a whole that moves together through a first coordination block (66). The upper end of the first coordination block (66) and the lower ends of the locking action block (63) and the retracting action block (65) are respectively attached to the upper and lower walls of the unilateral inner hole (62) so that the locking action block (63) can move in a cooperating manner. 3) and the retracting action block (65) maintain lateral movement; a first blocking block (67) is fixedly provided at the upper end of the inner side of the unilateral inner hole (62), the first blocking block (67) is located on the inner side of the first coordinating block (66), and the first built-in spring (64) is located between the first blocking block (67) and the first coordinating block (66); the spacing between the first blocking block (67) and the lower wall of the unilateral inner hole (62) is greater than or equal to the longitudinal cross-sectional width of the retracting action block (65); The lower end of the retracting action block (65) has an oblique sub-retracting surface (651); The unilateral inner shell (61) has a retraction control chamber (71), the retraction control chamber (71) is located below the unilateral inner hole (62), a retraction action shaft (72) is movably arranged in the retraction control chamber (71), the retraction action shaft (72) performs longitudinal reciprocating movement in the retraction control chamber (71), the upper end of the retraction action shaft (72) has a mother retraction surface (721) with the same slope as the child retraction surface (651), and the retraction action block (65) can be driven to move inwards by controlling the retraction action shaft (72) to move upward as the mother retraction surface (721) contacts the child retraction surface (651); The unilateral inner shell (61) is provided with an inner connecting hole (73) which connects the unilateral inner hole (62) and the retraction control cavity (71) and allows the retraction action shaft (72) to move longitudinally.

9. The display device according to claim 8, characterized in that: A second coordination block (74) is fixedly arranged on the inner side of the retraction action shaft (72); a second blocking block (75) is fixedly arranged on the lower end of the retraction control chamber (71), and the second coordination block (74) can contact with the second blocking block (75) to avoid separation; a second built-in spring (76) is arranged between the upper wall of the retraction control chamber (71) and the second coordination block (74) to apply a downward force to the retraction action shaft (72), and the retraction action shaft (72) maintains a state that does not hinder the outward movement of the locking action block (63); A wide pressing block (77) having a width larger than the transverse cross-section of the retracting action shaft (72) is fixedly arranged at the lower end thereof. The wide pressing block (77) can perform longitudinal reciprocating movement in the retracting control cavity (71); and the upward movement of the retracting action shaft (72) can be controlled by pressing the wide pressing block (77).

10. The display device according to claim 9, characterized in that: An inner partition (81) is formed between the two single-sided inner shells (61), and the extension base (51) has a central block (82) extending into the inner partition (81), and a third built-in spring (83) is compressed between the central block (82) and the bottom of the accommodating carrier (21); after the two locking action blocks (63) respectively enter the two locking inner concave surfaces (531) to lock the extension base (51), the third built-in spring (83) is in a compressed state; the central block (82) can also abut against the retracting action block (65) to prevent the first built-in spring (64) and the second built-in spring (76) from being over-pressurized and unable to return to their original state.

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