Backlight module for frameless liquid crystal smart television

Abstract

The invention relates to the technical field of backlight modules, in particular to a backlight module for a frameless liquid crystal smart television, which comprises a back plate and a first scatter plate, an accommodating cavity is formed between the back plate and the first scattering plate; a backlight unit is arranged in the accommodating cavity; the backlight unit comprises a backlight shell and a second scatter plate; a backlight cavity is formed between the backlight shell and the second scattering plate; a light bar is arranged at the top of the backlight cavity; the lamp strip is provided with blue light LED lamp beads; the backlight cavity is movably provided with a first movable plate and a second movable plate; the first movable plate is provided with red light quantum dots; the second movable plate is provided with green light quantum dots. The motor is adopted to drive the first movable plate and the second movable plate to move dynamically, flexible switching of three working conditions of partial red light, partial green light and white light can be stably achieved by changing the horizontal effective projection area of the quantum dots and regulating and controlling the excitation proportion of the red light and the green light, diversified use scenes of a user are comprehensively covered, and the user experience is improved. And the personalized visual experience is obviously improved.

Description

Technical Field

[0001] This invention relates to the field of backlight module technology, and more specifically to a backlight module for bezel-less LCD smart TVs. Background Technology

[0002] In the field of borderless smart TVs, the backlight module, as a core optical component, directly determines the display effect of the terminal by its light color performance and structural adaptability. In existing technologies, most mainstream backlight modules adopt a design scheme of fixed bonding of quantum dot films. Blue light excites quantum dots to convert them into red and green light, which are then mixed with the remaining blue light to form white light. Although this scheme can achieve basic color rendering, the fixed setting of the quantum dot film makes the excitation ratio of red and green light uncontrollable. It can only output a single white light or a fixed ratio of mixed light, and cannot achieve directional color shift. This makes it difficult to meet the personalized visual needs of users in different usage scenarios, thus limiting the expansion of the scenario-based applications of borderless TVs. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned shortcomings in the prior art by providing a backlight module for borderless LCD smart TVs.

[0004] The objective of this invention is achieved through the following technical solution: a backlight module for a borderless LCD smart TV, comprising a back panel and a first diffuser plate that is movably and vertically disposed at the bottom of the back panel; a receiving cavity is provided between the back panel and the first diffuser plate; and a backlight unit is provided within the receiving cavity; The backlight unit includes a backlight shell extending along its length into an accommodating cavity and a second diffuser plate disposed at the bottom of the backlight shell; a backlight cavity is formed between the backlight shell and the second diffuser plate; a light strip extending along its length is disposed at the top of the backlight cavity; the light strip is provided with blue LED beads; a first movable plate and a second movable plate are movably disposed at the bottom of the blue LED beads in the backlight cavity; the first movable plate is provided with red quantum dots; the second movable plate is provided with green quantum dots. Both the first movable plate and the second movable plate are located on top of the second scattering plate; the second scattering plate is located on top of the first scattering plate.

[0005] The present invention is further configured such that the light strip is provided with a plurality of blue LED beads along its length.

[0006] The present invention is further configured such that the backlight cavity is provided with a plurality of first movable plates and a plurality of second movable plates; the first movable plates and the second movable plates are arranged alternately in the backlight cavity along the length direction; The first movable plate, the second movable plate, the light strip, and the second diffuser plate are connected in alternating waves and troughs along the length direction; the blue LED beads are located at the top of the troughs.

[0007] The invention is further configured such that a drive shaft is rotatably provided at the top of the wave crest segment; a limiting groove extending along the length direction is provided at the bottom of the backlight cavity; a first drive arm is provided at one end of the drive shaft; a second drive arm is provided at the other end of the drive shaft; the top of the first movable plate is hinged to the first drive arm; the bottom of the first movable plate is movably disposed in the limiting groove; the top of the second movable plate is hinged to the second drive arm; and the bottom of the second movable plate is movably disposed in the limiting groove.

[0008] The invention is further configured such that a connecting rod extending along the length direction is provided at the top of the backlight cavity; each drive shaft is provided with a connecting arm; the connecting arm is hinged to the connecting rod.

[0009] The present invention is further configured such that a motor and a rotating shaft are provided inside the accommodating cavity; the rotating shaft is connected to one of the drive shafts in a surface fit; and the output end of the motor is connected to the rotating shaft.

[0010] The present invention is further configured such that the output end of the motor is connected to a rotating disk; the rotating disk is eccentrically provided with an eccentric pin; a swing arm is positioned between the eccentric pin and the first scattering plate; and the two ends of the swing arm are respectively hinged to the eccentric pin and the first scattering plate.

[0011] The present invention is further configured such that the first scattering plate is provided with a guide block; and the back plate is provided with a guide groove extending along the height direction.

[0012] The present invention is further configured such that both the first movable plate and the second movable plate are made of transparent material.

[0013] The present invention is further configured such that the back panel is provided with a plurality of backlight units arranged along the width direction; the rotating shaft extends along the width direction; and one of the drive shafts in each backlight unit is respectively connected to the rotating shaft profile.

[0014] The beneficial effects of the present invention are as follows: The present invention uses a motor to drive the dynamic displacement of the first movable plate and the second movable plate. By changing the effective horizontal projection area of ​​the quantum dot, the excitation ratio of red light and green light can be controlled, and the flexible switching between three working conditions of red light, green light and white light can be stably realized, which fully covers the diverse usage scenarios of users and significantly improves the personalized visual experience. Attached Figure Description

[0015] The invention will be further illustrated with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the invention. For those skilled in the art, other drawings can be obtained based on the following drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention after the back plate is hidden; Figure 3 This is a structural schematic diagram from another perspective of the present invention; Figure 4 This is a schematic diagram of the structure of the present invention after the first scattering plate is hidden; Figure 5 This is a cross-sectional view of the present invention; Figure 6 yes Figure 5 A magnified view of part A in the middle; Figure 7 This is a schematic diagram of the backlight unit of the present invention; Figure 8 This is a schematic diagram of the structure of the backlight unit after the backlight shell is hidden in the present invention; Figure 9 yes Figure 8 A magnified view of part B in the middle; The components are as follows: 1. Backplate; 11. Receiving cavity; 12. Guide groove; 2. First diffuser plate; 21. Guide block; 31. Backlight shell; 32. Second diffuser plate; 33. Backlight cavity; 34. Limiting groove; 4. Light strip; 41. Blue LED bead; 51. First movable plate; 52. Second movable plate; 53. Red quantum dot; 54. Green quantum dot; 55. Crest section; 56. Trough section; 6. Drive shaft; 61. First drive arm; 62. Second drive arm; 63. Connecting arm; 64. Linkage rod; 7. Motor; 71. Rotating shaft; 72. Rotating disk; 73. Eccentric pin; 74. Swing arm. Detailed Implementation

[0017] The present invention will be further described in conjunction with the following embodiments.

[0018] Depend on Figures 1 to 9 As can be seen, the backlight module for a frameless LCD smart TV described in this embodiment includes a back plate 1 and a first diffuser plate 2 that is movably and vertically disposed at the bottom of the back plate 1; an accommodating cavity 11 is provided between the back plate 1 and the first diffuser plate 2; a backlight unit is provided in the accommodating cavity 11. The backlight unit includes a backlight shell 31 extending along the length direction and disposed in the accommodating cavity 11, and a second diffuser plate 32 disposed at the bottom of the backlight shell 31; a backlight cavity 33 is formed between the backlight shell 31 and the second diffuser plate 32; a light strip 4 extending along the length direction is provided at the top of the backlight cavity 33; the light strip 4 is provided with blue LED beads 41; a first movable plate 51 and a second movable plate 52 are movably disposed at the bottom of the blue LED beads 41 in the backlight cavity 33; the first movable plate 51 is provided with red quantum dots 53; the second movable plate 52 is provided with green quantum dots 54; The first movable plate 51 and the second movable plate 52 are both located on top of the second scattering plate 32; the second scattering plate 32 is located on top of the first scattering plate 2.

[0019] Specifically, in this embodiment, the backplate 1 is used as the mounting base. By layering the first scattering plate 2, the second scattering plate 32 and the backlight unit, part of the blue light emitted by the blue LED beads penetrates the first movable plate 51 (red quantum dot 53) and the second movable plate 52 (green quantum dot 54) and excites it to emit light. The other part propagates directly downwards. The three types of light are initially homogenized by the second scattering plate 32 and then homogenized by the first scattering plate 2 to form a mixed light output. The movable design of the first movable plate 51 and the second movable plate 52 provides a structural basis for light color adjustment, and the layered layout of the dual scattering plates reserves adjustment space for the scattering adaptation of different wavelengths of light.

[0020] The layered optical structure design of this embodiment is compact, which not only meets the installation requirements of the frameless TV to be thin and light, but also improves the uniformity of the basic white light through the initial and secondary light homogenization of the dual scattering plates; the independent bearing design of red quantum dot 53 and green quantum dot 54 lays the structural foundation for directional light color adjustment and avoids the light color interference problem caused by quantum dot mixing.

[0021] This embodiment describes a backlight module for a borderless LCD smart TV. The light strip 4 has multiple blue LED beads 41 arranged along its length. These blue LED beads are spaced apart along the length of the light strip 4, forming a uniformly distributed blue light source matrix to ensure consistent blue light illumination intensity across the entire backlight cavity 33. The coordinated luminescence of multiple blue LED beads increases the total blue light flux, providing sufficient energy for the full excitation of red quantum dots 53 and green quantum dots 54, while avoiding localized insufficient light intensity or shadow problems caused by the emission of a single blue LED bead.

[0022] The backlight module for a frameless LCD smart TV described in this embodiment includes a backlight cavity 33 with a plurality of first movable plates 51 and a plurality of second movable plates 52; the first movable plates 51 and the second movable plates 52 are arranged alternately along the length direction in the backlight cavity 33. The first movable plate 51, the second movable plate 52, the light strip 4 and the second diffuser plate 32 are connected in a series of alternating peak sections 55 and trough sections 56 along the length direction; the blue LED light beads 41 are located at the top of the trough section 56.

[0023] In this embodiment, the first movable plate 51 and the second movable plate 52 are arranged alternately along the length direction, so that the red quantum dots 53 and the green quantum dots 54 form an alternately distributed excitation region in the backlight cavity 33. The first movable plate 51, the second movable plate 52, the lamp strip 4 and the second diffuser plate 32 together constitute an alternately connected peak segment 55 and trough segment 56. The blue LED lamp bead is located at the top of the trough segment 56. The spatial structure of the trough segment 56 allows the blue light to be concentrated and irradiated onto the alternately arranged first movable plate 51 and the second movable plate 52 below. At the same time, the peak segment 55 can perform preliminary reflection and guidance of the blue light, reducing the dissipation of light energy.

[0024] This embodiment describes a backlight module for a borderless LCD smart TV. The top of the wave crest section 55 is rotatably equipped with a drive shaft 6; the bottom of the backlight cavity 33 is provided with a limiting groove 34 extending along its length; one end of the drive shaft 6 is provided with a first drive arm 61; the other end of the drive shaft 6 is provided with a second drive arm 62; the top of the first movable plate 51 is hinged to the first drive arm 61; the bottom of the first movable plate 51 is movably disposed in the limiting groove 34; the top of the second movable plate 52 is hinged to the second drive arm 62; the bottom of the second movable plate 52 is movably disposed in the limiting groove 34.

[0025] Specifically, when the drive shaft 6 rotates, the first drive arm 61 and the second drive arm 62 at both ends synchronously drive the corresponding first movable plate 51 and second movable plate 52 to translate along the limiting groove 34. The limiting groove 34 guides and limits the bottom of the first movable plate 51 and the second movable plate 52 to ensure that the first movable plate 51 and the second movable plate 52 only move along the length direction, avoiding quantum dot irradiation deviation caused by offset. Multiple drive shafts 6 are linked with the connecting rod 64 through the connecting arm 63 to realize the synchronous movement of all the first movable plates 51 and the second movable plate 52, ensuring that the excitation ratio of red quantum dot 53 and green quantum dot 54 is consistent throughout the entire range.

[0026] This embodiment describes a backlight module for a frameless LCD smart TV. The top of the backlight cavity 33 is provided with a connecting rod 64 extending along its length. Each drive shaft 6 is provided with a connecting arm 63, which is hinged to the connecting rod 64. The connecting rod 64 extends along the length of the backlight cavity 33, and the connecting arm 63 of each drive shaft 6 is hinged to the connecting rod 64, forming a synchronous transmission mechanism. When one drive shaft 6 rotates, the connecting arm 63 drives the connecting rod 64 to translate, thereby driving all drive shafts 6 to rotate synchronously, achieving synchronous displacement of all first movable plates 51 and second movable plates 52, ensuring that the adjustment range of each first movable plate 51 and second movable plate 52 is completely consistent.

[0027] This embodiment describes a backlight module for a borderless LCD smart TV. The accommodating cavity 11 houses a motor 7 and a rotating shaft 71. The rotating shaft 71 is connected to one of the drive shafts 6 via a surface fit. The output end of the motor 7 is connected to the rotating shaft 71. The output torque of the motor 7 is transmitted to the drive shafts 6 of each backlight unit through the rotating shaft 71, achieving centralized driving of the drive shafts 6 by the motor 7. The precise speed control of the motor 7 can be converted into a precise rotation angle of the drive shaft 6, which in turn is converted into a precise displacement of the movable plate, enabling quantitative adjustment of the projected area of ​​the red quantum dots 53 and the green quantum dots 54.

[0028] This embodiment describes a backlight module for a borderless LCD smart TV. The output end of the motor 7 is connected to a rotating disk 72. The rotating disk 72 is eccentrically mounted with an eccentric pin 73. A swing arm 74 connects the eccentric pin 73 to the first diffuser plate 2. Both ends of the swing arm 74 are hinged to the eccentric pin 73 and the first diffuser plate 2, respectively. When the motor 7 drives the rotating disk 72 to rotate, the eccentric pin 73 moves in a circular motion with the rotating disk 72. The swing arm 74 converts this circular motion into the lifting and lowering motion of the first diffuser plate 2. The guide block 21 of the first diffuser plate 2 slides along the guide groove 12 of the backplate 1, ensuring smooth and precise lifting and lowering motion, and achieving precise adjustment of the distance between the first diffuser plate 2 and the backlight unit.

[0029] This embodiment describes a backlight module for a borderless LCD smart TV. The first diffuser plate 2 is provided with a guide block 21; the back plate 1 is provided with a guide groove 12 extending along the height direction. When the first diffuser plate 2 is raised or lowered, the guide block 21 is embedded in the guide groove 12 and slides along the groove. The guide groove 12 forms a radial limit on the guide block 21, preventing horizontal offset or tilting of the first diffuser plate 2 during the raising or lowering process, and ensuring that the first diffuser plate 2 always remains parallel to the second diffuser plate 32 and the backlight unit.

[0030] The backlight module for a borderless LCD smart TV described in this embodiment is made of transparent material for both the first movable plate 51 and the second movable plate 52. The use of transparent material for the first movable plate 51 and the second movable plate 52 ensures that blue light can penetrate the material to excite the quantum dots inside, while reducing the absorption and reflection losses of blue light by the material. The low optical interference characteristics of the transparent material allow blue light to act efficiently on the quantum dots without affecting the mixed propagation of red, green, and blue light after excitation.

[0031] This embodiment describes a backlight module for a borderless LCD smart TV. A backplate 1 is provided with multiple backlight units arranged along its width. A rotating shaft 71 extends along its width. One drive shaft 6 within each backlight unit is respectively connected to the rotating shaft 71 through a surface-fitting connection. The backplate 1, with its multiple backlight units arranged along its width and the rotating shaft 71 extending along its width and engaging with the drive shaft 6 of each backlight unit, forms a multi-unit centralized drive structure. When the motor 7 drives the rotating shaft 71 to rotate, it synchronously drives the drive shafts 6 of all backlight units to rotate, achieving synchronous adjustment of the first movable plate 51 and the second movable plate 52 within all backlight units.

[0032] The backlight module for a borderless LCD smart TV described in this embodiment achieves precise linkage between the displacement adjustment of the first movable plate 51 (red quantum dot 53) and the second movable plate 52 (green quantum dot 54) and the lifting adjustment of the first scattering plate 2. This allows for adaptation to the scattering characteristics of different light wavelengths, enabling stable switching between three operating conditions: white light, red-biased light, and green-biased light. Furthermore, the action logic, coordination relationship, and optical effect of the three components are highly matched under each operating condition, as detailed below: Under white light conditions, the first movable plate 51 and the second movable plate 52 are alternately arranged along the length of the backlight cavity 33, and both are in a horizontal middle position. The drive shaft 6 does not rotate, and the bottoms of the first movable plate 51 and the second movable plate 52 are stably restricted in the middle area of ​​the limiting groove 34 by the first drive arm 61 and the second drive arm 62, and their horizontal projected areas are completely equal. At this time, the blue light emitted by the blue LED beads fully covers the alternately arranged movable plates, and the red quantum dots 53 and the green quantum dots 54 receive equal amounts of blue light irradiation, maintaining a balance in excitation intensity. At the same time, the transparent material of the first movable plate 51 and the second movable plate 52 does not block the unexcited blue light, ensuring that the blue light can propagate smoothly downwards, providing a basis for the mixing of the three colors of light. Furthermore, the first diffuser plate 2 is stably positioned at the middle height through the guide block 21 and the guide groove 12 of the back plate 1, maintaining a fixed distance from the second diffuser plate 32 and the backlight unit. At this time, the motor 7 does not drive the rotating disk 72 to rotate, and the swing arm 74 is in a horizontal balance state, ensuring that the first diffuser plate 2 has no lifting displacement. The first diffuser plate 2 receives the mixed light (red light, green light, and blue light) after the initial light homogenization by the second diffuser plate 32, and performs secondary light homogenization through its own scattering structure to eliminate the intensity fluctuations and slight light shadows that may occur during the propagation of the three colors of light. The design of the middle spacing of the first diffuser plate 2 can simultaneously adapt to the basic scattering requirements of red light (long wavelength) and the moderate scattering requirements of green light (short wavelength), avoiding excessive or insufficient scattering of a single color of light, and finally outputting white light with uniform brightness and pure color, suitable for general scenarios such as daily movie watching and video calls.

[0033] Under reddish light conditions, after receiving the reddish light adjustment command, the controller drives the rotating shaft 71 to rotate, which in turn drives the drive shafts 6 of each backlight unit to rotate in the positive direction through surface fitting. The first drive arm 61 at one end of the drive shaft 6 pushes the first movable plate 51 (red quantum dot 53) to translate outward along the limiting groove 34, increasing its horizontal projected area. The second drive arm 62 at the other end pulls the second movable plate 52 (green quantum dot 54) to translate inward, decreasing its horizontal projected area. All drive shafts 6 are linked to the connecting rod 64 through the connecting arm 63, ensuring that all first movable plates 51 and second movable plates 52 move synchronously, and the projected area adjustment is consistent throughout the entire range. After the projected area of ​​the first movable plate 51 increases, it receives more blue light irradiation, and the excitation intensity of the red quantum dot 53 is significantly improved. The projected area of ​​the second movable plate 52 decreases, and the excitation intensity of the green quantum dot 54 increases. As the intensity decreases, the mixed light color naturally shifts towards red, achieving directional color adjustment. Additionally, motor 7 synchronously drives the rotating disk 72 to rotate, and the eccentric pin 73 moves in a circular motion with the disk 72. Through the swing arm 74, it pulls the first scattering plate 2 upwards and downwards along the guide groove 12, moving it closer to the second scattering plate 32, shortening the light propagation path. The cooperation between the guide block 21 and the guide groove 12 ensures smooth lifting and lowering of the scattering plate, without tilting or horizontal deviation. Addressing the characteristics of red light's long wavelength and low scattering efficiency, the first scattering plate 2, upon approaching, increases the number of collisions between red light and scattering particles, enhancing scattering intensity, breaking up concentrated red light beams, and preventing localized bright spots. Simultaneously, it optimizes the scattering uniformity of blue light, ensuring no localized color difference after mixing red and blue light, ultimately outputting a uniformly bright, pure reddish light, suitable for scenarios requiring enhanced atmosphere, such as movie playback and gaming.

[0034] Under green light conditions, after receiving the green light adjustment command, the controller drives the rotating shaft 71 to rotate in the opposite direction, causing each drive shaft 6 to rotate in the opposite direction. The second drive arm 62 at one end of the drive shaft 6 pushes the second movable plate 52 (green quantum dot 54) to move outward along the limiting groove 34, increasing its horizontal projected area. The first drive arm 61 at the other end pulls the first movable plate 51 (red quantum dot 53) to move inward, reducing its horizontal projected area. The multiple drive shafts 6 are synchronously linked through the connecting rod 64 to ensure that the displacement amplitude of all movable plates is consistent, and the green quantum dot 54 is excited uniformly throughout its entire range. After the projected area of ​​the second movable plate 52 increases, the green quantum dot 54 receives more blue light irradiation, and the excitation intensity is greatly improved. The projected area of ​​the first movable plate 51 decreases, the excitation intensity of the red quantum dot 53 weakens, and the mixed light intensity decreases. The light source is shifted towards green light to meet the visual needs of scenarios such as office documents and web browsing. In addition, the motor 7 synchronously drives the rotating disk 72 to rotate in the opposite direction, and the eccentric pin 73 pushes the first scattering plate 2 to move down and up along the guide groove 12 through the swing arm 74, away from the backlight unit, and extend the light propagation path. The guide block 21 slides smoothly along the guide groove 12 to ensure that the scattering plate always remains parallel to the second scattering plate 32, avoiding uneven scattering effect. In view of the characteristics of green light having a short wavelength and high scattering efficiency, the first scattering plate 2 moving away can reduce the collision frequency between green light and scattering particles, reduce the scattering intensity, and avoid light energy loss and light color distortion caused by excessive scattering of green light. At the same time, the extended propagation path can naturally weaken the light and shadow interference of the lamp beads, ensuring that the picture is transparent and clear after the green light and the remaining blue light are mixed, with sufficient brightness and no obvious color difference.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A backlight module for a borderless LCD smart TV, characterized in that: It includes a back plate (1) and a first diffuser plate (2) that is movable and liftable at the bottom of the back plate (1); a cavity (11) is provided between the back plate (1) and the first diffuser plate (2); a backlight unit is provided in the cavity (11); The backlight unit includes a backlight shell (31) extending along the length direction and disposed in the accommodating cavity (11), and a second diffuser plate (32) disposed at the bottom of the backlight shell (31); a backlight cavity (33) is formed between the backlight shell (31) and the second diffuser plate (32); a light strip (4) extending along the length direction is provided at the top of the backlight cavity (33); the light strip (4) is provided with blue LED beads (41); a first movable plate (51) and a second movable plate (52) are movably disposed at the bottom of the blue LED beads (41) in the backlight cavity (33); the first movable plate (51) is provided with red quantum dots (53); the second movable plate (52) is provided with green quantum dots (54); The first movable plate (51) and the second movable plate (52) are both located on top of the second scattering plate (32); the second scattering plate (32) is located on top of the first scattering plate (2).

2. A backlight module for a borderless LCD smart TV according to claim 1, characterized in that: The light strip (4) is provided with multiple blue LED beads (41) along its length.

3. A backlight module for a borderless LCD smart TV according to claim 2, characterized in that: The backlight cavity (33) is provided with a plurality of first movable plates (51) and a plurality of second movable plates (52); the first movable plates (51) and the second movable plates (52) are arranged alternately along the length direction in the backlight cavity (33); The first movable plate (51), the second movable plate (52), the light strip (4) and the second diffuser plate (32) are connected in a series of alternating peak sections (55) and trough sections (56) along the length direction; the blue LED beads (41) are located at the top of the trough section (56).

4. A backlight module for a borderless LCD smart TV according to claim 3, characterized in that: The top of the wave crest section (55) is rotatably provided with a drive shaft (6); the bottom of the backlight cavity (33) is provided with a limiting groove (34) extending along the length direction; one end of the drive shaft (6) is provided with a first drive arm (61); the other end of the drive shaft (6) is provided with a second drive arm (62); the top of the first movable plate (51) is hinged to the first drive arm (61); the bottom of the first movable plate (51) is movably provided in the limiting groove (34); the top of the second movable plate (52) is hinged to the second drive arm (62); the bottom of the second movable plate (52) is movably provided in the limiting groove (34).

5. A backlight module for a borderless LCD smart TV according to claim 4, characterized in that: The top of the backlight cavity (33) is provided with a connecting rod (64) extending along the length direction; each drive shaft (6) is provided with a connecting arm (63); the connecting arm (63) is hinged to the connecting rod (64).

6. A backlight module for a borderless LCD smart TV according to claim 4, characterized in that: The accommodating cavity (11) is equipped with a motor (7) and a rotating shaft (71); the rotating shaft (71) is connected to one of the drive shafts (6) in a shaped fit; the output end of the motor (7) is connected to the rotating shaft (71).

7. A backlight module for a borderless LCD smart TV according to claim 6, characterized in that: The output end of the motor (7) is connected to a rotating disk (72); the rotating disk (72) is eccentrically provided with an eccentric pin (73); the eccentric pin (73) and the first scattering plate (2) are connected by a swing arm (74); the two ends of the swing arm (74) are respectively hinged to the eccentric pin (73) and the first scattering plate (2).

8. A backlight module for a borderless LCD smart TV according to claim 1, characterized in that: The first scattering plate (2) is provided with a guide block (21); the back plate (1) is provided with a guide groove (12) extending along the height direction.

9. A backlight module for a borderless LCD smart TV according to claim 1, characterized in that: Both the first movable plate (51) and the second movable plate (52) are made of transparent material.

10. A backlight module for a borderless LCD smart TV according to claim 6, characterized in that: The back panel (1) is provided with multiple backlight units arranged along the width direction; the rotating shaft (71) extends along the width direction; one of the drive shafts (6) in each backlight unit is respectively connected to the rotating shaft (71) in a shaped fit.

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