A regional dimming backlight module

Abstract

The present invention relates to the technical field of backlight modules, and in particular to a regional dimming backlight module. The present invention comprises a bottom plate, a groove is provided on the bottom plate, and a plurality of light source assemblies are arranged in the groove; first slide grooves are provided on the inner walls of both sides of the groove, a sliding shaft is installed on the inner wall of the first slide groove, and a plurality of sliders are slidably connected to the sliding shaft; the light source assembly comprises an adjustment column, and the two ends of the adjustment column are respectively fixedly connected to two sliders; a plurality of moving blocks are slidably connected to the adjustment column, and a plurality of light-emitting mechanisms are arranged on the moving blocks; by pushing the moving blocks at both ends, the plurality of moving blocks drive the light-emitting mechanisms to move synchronously with equal gaps, so as to adjust the positions of the plurality of light-emitting mechanisms, and then cooperate with the slider to drive the adjustment column to move, so as to adjust the positions of the light-emitting mechanisms in both the horizontal and vertical directions, and adjust the positions of the light-emitting areas.

Description

Technical Field

[0001] The invention belongs to the technical field of backlight modules, and in particular relates to a regional dimming backlight module. Background Art

[0002] In the field of displays, since the display panel itself does not have luminous efficiency, it must be equipped with a backlight module that can provide light to achieve the purpose of displaying images. Conventional backlight modules at least include a light guide plate and a light source. After the light from the light source enters the light guide plate, it is affected by its light guide characteristics to form a surface light source that is uniformly projected onto the display panel. In the backlight module, many additional optical components are often required to improve the light output efficiency of the backlight module, such as uniformity or brightness.

[0003] In addition to providing uniform light, the backlight module is also required to have the function of controlling the light intensity and area to achieve the above-mentioned goals. This technology is called regional control technology. For existing backlight modules, when dimming the area, it is often only possible to adjust a specific area, and the position of the dimming area cannot be adjusted, making the regional dimming operation more limited and unable to meet the luminous requirements of the display panel.

[0004] After searching, in the prior art, the publication number is CN117872642A, the publication date is 2024-04-12, and a backlight module with regional dimming function is disclosed, which relates to the technical field of backlight modules. In view of the problem that the installation structure in the prior art will greatly increase the overall manufacturing cost and take considerable assembly time, the following scheme is proposed, including a bottom shell, a reflective sheet is arranged in the bottom shell, and a light guide plate is arranged on the top of the reflective sheet, a first diffuser is arranged on the top of the light guide plate, and a prism sheet is arranged on the top of the first diffuser, a second diffuser is arranged on the top of the prism sheet, and a rubber frame is arranged on the top of the second diffuser, and a lighting mechanism distributed at equal distances is arranged in the bottom shell. The present application can fine-tune the position of the lighting mechanism in the bottom shell through the sliding fit between the adjustment slot and the stud, and can better complete the complete adjustment of the lighting mechanism, and can quickly realize the disassembly and assembly of the circular light guide column through the fastening assembly, thereby improving the work efficiency of assembly and disassembly.

[0005] However, the device still has the following defects: although the position of the lighting mechanism can be fine-tuned in the bottom shell, the device cannot adjust the position of the dimming area over a large range and cannot adjust the luminous density, making the regional dimming operation relatively limited and unable to meet the luminous requirements of the display panel. Summary of the invention

[0006] In view of the above problems, the present invention provides a regional dimming backlight module, comprising a bottom plate, the bottom plate is provided with a groove, and a plurality of light source components are arranged in the groove;

[0007] The inner walls of both sides of the groove are provided with first sliding grooves, the inner walls of the first sliding grooves are provided with sliding shafts, and the sliding shafts are slidably connected with a plurality of groups of sliding blocks;

[0008] The light source assembly comprises an adjustment column, and both ends of the adjustment column are fixedly connected to two groups of sliders respectively;

[0009] The adjusting column is slidably connected to a plurality of moving blocks, and each of the plurality of moving blocks is provided with a light emitting mechanism;

[0010] By pushing the moving blocks at both ends, several groups of moving blocks drive the light-emitting mechanisms to move synchronously with equal gaps, so as to adjust the positions of several groups of light-emitting mechanisms. Then, the slider drives the adjustment column to move, so as to realize the horizontal and vertical bidirectional position adjustment of the light-emitting mechanism and the position adjustment of the light-emitting area.

[0011] Furthermore, a reflective sheet, a light guide plate and a diffuser are laid on the bottom plate, an electromagnetic plate is arranged at the bottom end of the inner wall of the groove, the electromagnetic plate is electrically connected to a power source, and the bottom ends of several groups of light source assemblies are movably fitted with the electromagnetic plate.

[0012] Furthermore, second slide grooves are provided on the outer walls on both sides of the bottom plate, and two groups of the second slide grooves are respectively connected to a corresponding group of first slide grooves. A first spring is provided between each two adjacent groups of sliders, and several groups of the first springs are sleeved on the sliding shaft.

[0013] Furthermore, one end of the slider is fixedly connected to a linkage shaft, which passes through the side wall of the base plate and is fixedly connected to a limiting block. The linkage shaft is movably fitted with the second sliding groove, and a clamping block is sleeved on the linkage shaft. The outer side wall of the base plate is provided with a plurality of groups of clamping grooves, and the plurality of groups of clamping grooves are respectively movably clamped with a corresponding group of clamping blocks.

[0014] Furthermore, spring wires are arranged between several groups of the moving blocks, several groups of the spring wires are covered with insulating layers, several groups of the spring wires are connected in parallel, and sliding holes are opened on the moving blocks, and the sliding holes are movably fitted with the adjusting columns.

[0015] Furthermore, a threaded hole is provided at the top of the moving block, and the threaded hole is threadedly connected to the light-emitting mechanism. A first conductive sheet is provided at the bottom end of the inner wall of the threaded hole, and a second conductive sheet is provided on the side wall of the moving block. The second conductive sheet is electrically connected to one end of an adjacent group of spring wires, and an insulated wire is electrically connected between the second conductive sheet and the first conductive sheet. The insulated wire is embedded in the moving block, and a magnetic block is fixedly connected to the bottom end of the moving block.

[0016] Furthermore, the light-emitting mechanism includes a threaded shaft, which is threadedly connected to the threaded hole, a conductive block is provided at the bottom end of the threaded shaft, the conductive block is in contact with the first conductive sheet, a conical reflector is fixedly connected to the top end of the threaded shaft, the inner wall of the conical reflector is paved with a reflective sheet, a lamp bead is installed at the center of the bottom end of the inner wall of the conical reflector, and the lamp bead is electrically connected to the conductive block.

[0017] Furthermore, an adjustment slot is provided inside the adjustment column, a rotating shaft is fixedly connected to the inner wall of the adjustment slot, a plurality of rotating disks are fixedly connected to the rotating shaft, a protrusion is fixedly connected to the rotating disk, and a linkage rod is rotatably connected to the protrusion.

[0018] Furthermore, several groups of limit grooves are provided on the adjusting column, several groups of the limit grooves are interconnected with the adjusting grooves, several groups of the limit grooves are slidably connected with sliding rods, the bottom ends of several groups of the sliding rods are rotatably connected to one end of a corresponding group of linkage rods, one end of the sliding rod is fixedly connected with a wedge-shaped limit block, a second spring is arranged between the wedge-shaped limit block and the inner wall of the limit groove, and the second spring is sleeved on the sliding rod.

[0019] Furthermore, a first bevel gear is fixedly connected to the rotating shaft, a second bevel gear is meshedly connected to the first bevel gear, a transmission shaft is fixedly connected to the center of the second bevel gear, and one end of the transmission shaft passes through the adjustment column and is fixedly connected to a knob.

[0020] The beneficial effects of the present invention are:

[0021] 1. By pushing the moving blocks at both ends, several groups of moving blocks drive the light-emitting mechanisms to move synchronously with equal gaps, so as to adjust the positions of several groups of light-emitting mechanisms. Then, the slider drives the adjustment column to move, so as to achieve the horizontal and vertical two-way position adjustment of the light-emitting mechanism, so as to change the area where the light-emitting mechanism is located. For example, the light-emitting area can appear at the corners, center, and surroundings of the bottom plate, so as to realize the free switching of the position of the regional dimming and improve the flexibility of the regional dimming of the backlight module.

[0022] 2. Through the tension of the spring wire, several groups of moving blocks drive the light-emitting mechanism to move synchronously with equal gaps. Through the tension of several groups of first springs, when one group of sliders is pushed to move, the remaining groups of sliders can maintain the same gap and move synchronously, so that the position adjustment of the light-emitting mechanism is more efficient, and the light emitted by the light-emitting mechanism is more uniform. The luminous density can be adjusted by changing the gap of the light-emitting mechanism, thereby improving the application range of the regional dimming of the backlight module.

[0023] 3. By pushing the snap-in block, the snap-in block is snapped into a corresponding set of snap-in grooves, and the slider is limited, so as to fix the position of the light source assembly. After completing the position adjustment of the moving block, release the knob. Due to the tension of the second spring, the wedge-shaped limit block moves upward to the outside of the limit groove, and the adjacent set of moving blocks is snapped to fix their positions. When the light source assembly is powered on for operation, the electromagnetic plate is also powered on synchronously, so that the electromagnetic plate generates magnetism, which generates an attractive force on the bottom end of the light source assembly, effectively improving the stability of the light-emitting position of the backlight module.

[0024] 4. By rotating the threaded shaft, the conductive block is brought into contact with the first conductive sheet to complete the installation of the light-emitting mechanism. The second conductive sheet and the first conductive sheet are made conductive through the spring wire to realize power supply to the lamp beads. By connecting several groups of spring wires in parallel, a group of lamp beads can be found and replaced in time after a failure occurs, effectively reducing the difficulty of fault inspection and repair of the backlight module. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the main structure of an embodiment of the present invention is shown;

[0027] Figure 2 The embodiment of the present invention is shown Figure 1 The enlarged schematic diagram at A in the middle;

[0028] Figure 3 The embodiment of the present invention is shown Figure 1 The enlarged schematic diagram of point B in the middle;

[0029] Figure 4 A schematic structural diagram of a light source assembly according to an embodiment of the present invention is shown;

[0030] Figure 5 It shows a schematic structural diagram of a moving block and a light-emitting mechanism according to an embodiment of the present invention;

[0031] Figure 6 A cross-sectional view of the internal structure of the adjusting column according to an embodiment of the present invention is shown;

[0032] Figure 7 The embodiment of the present invention is shown Figure 6 The enlarged schematic diagram at C in the middle;

[0033] Figure 8 A cross-sectional view of the internal structure of the adjusting column according to an embodiment of the present invention is shown;

[0034] Fig. 9 A schematic top view of the region position after adjustment according to an embodiment of the present invention is shown;

[0035] Fig.10 A schematic top view of the region position after adjustment according to an embodiment of the present invention is shown.

[0036] In the figure: 1, bottom plate; 101, groove; 102, first slide groove; 103, second slide groove; 104, snap-in groove; 2, electromagnetic plate; 3, light source assembly; 301, adjustment column; 3011, adjustment groove; 3012, limit groove; 302, moving block; 3021, sliding hole; 3022, threaded hole; 3023, first conductive sheet; 3024, second conductive sheet; 3025, insulated wire; 3026, magnetic block; 303, spring wire; 304, light-emitting mechanism; 304 1. Threaded shaft; 3042. Conductive block; 3043. Conical reflector; 3044. Reflective sheet; 3045. Lamp beads; 305. Rotating shaft; 306. Turntable; 307. Bump; 308. Linking rod; 309. Sliding rod; 310. Wedge-shaped limit block; 311. Second spring; 312. First bevel gear; 313. Second bevel gear; 314. Transmission shaft; 315. Knob; 4. Sliding shaft; 5. Sliding block; 6. First spring; 7. Linking shaft; 8. Limit block; 9. Snap-in block. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] The embodiment of the present invention provides a regional dimming backlight module, including a base plate 1; illustratively, as Figure 1-3 shown.

[0039] The bottom plate 1 is provided with a reflective sheet, a light guide plate, and a diffuser sheet. The bottom plate 1 is provided with a groove 101. The bottom end of the inner wall of the groove 101 is provided with an electromagnetic plate 2. The electromagnetic plate 2 is electrically connected to a power source. Several groups of light source assemblies 3 are provided in the groove 101. The several groups of light source assemblies 3 are electrically connected to the power source. The bottom ends of the several groups of light source assemblies 3 are movably fitted with the electromagnetic plate 2.

[0040] Specifically, when the light source assembly 3 is powered on for operation, the electromagnetic plate 2 is also powered on synchronously, causing the electromagnetic plate 2 to generate magnetism, thereby generating an attractive force on the bottom end of the light source assembly 3, making the light source assembly 3 more stable during operation, and preventing the light source assembly 3 from moving or tilting and affecting the light guiding effect. When the power supply of the light source assembly 3 is cut off, the electromagnetic plate 2 is also powered off synchronously, causing it to lose its attractive force on the light source assembly 3, thereby facilitating the regional dimming operation of the light source assembly 3.

[0041] The inner walls on both sides of the groove 101 are provided with first slide grooves 102, and the outer walls on both sides of the bottom plate 1 are provided with second slide grooves 103. Two groups of the second slide grooves 103 are respectively connected to the corresponding group of first slide grooves 102. The inner wall of the first slide groove 102 is installed with a sliding shaft 4, and a plurality of groups of sliders 5 are slidably connected to the sliding shaft 4. The plurality of groups of the sliders 5 are respectively fixedly connected to one end of a group of light source components 3. A first spring 6 is provided between each two adjacent groups of sliders 5, and the plurality of groups of the first springs 6 are sleeved on the sliding shaft 4.

[0042] One end of the slider 5 is fixedly connected with a linkage shaft 7, and the linkage shaft 7 passes through the side wall of the bottom plate 1 and is fixedly connected with a limit block 8. The linkage shaft 7 is movably fitted with the second slide groove 103, and a clamping block 9 is sleeved on the linkage shaft 7. The outer side wall of the bottom plate 1 is provided with a plurality of groups of clamping grooves 104, and the plurality of groups of the clamping grooves 104 are movably clamped with a corresponding group of clamping blocks 9 respectively.

[0043] Specifically, by fixing a group of light source assemblies 3 between two groups of opposite sliders 5, the two groups of sliders 5 can drive the light source assemblies 3 to move synchronously while moving, and the position of the light source assemblies 3 can be adjusted. By the tension of several groups of first springs 6, when one group of sliders 5 is pushed to move, the remaining groups of sliders 5 can keep the same gap and move synchronously, so that the position adjustment of the light source assemblies 3 is more efficient, and the light emitted by the light source assemblies 3 is more uniform.

[0044] Furthermore, by pulling the clamping block 9, the slider 5 is moved synchronously, which makes the position adjustment of the slider 5 more convenient. After the position adjustment is completed, the clamping block 9 is pushed to make the clamping block 9 snap into a corresponding set of clamping grooves 104 to limit the slider 5, thereby achieving the position fixation of the light source assembly 3. The position of the light source assembly 3 can be adjusted by pulling the clamping block 9 to disengage it from the clamping groove 104.

[0045] For example, Figure 4 shown.

[0046] The light source assembly 3 includes an adjustment column 301, both ends of which are fixedly connected to two groups of sliders 5, respectively. A plurality of groups of moving blocks 302 are slidably connected to the adjustment column 301, and spring wires 303 are arranged between the plurality of groups of moving blocks 302. The plurality of groups of spring wires 303 are covered with an insulating layer, and the plurality of groups of spring wires 303 are electrically connected to a power source, and the plurality of groups of spring wires 303 are connected in parallel, and a light emitting mechanism 304 is arranged on the plurality of groups of moving blocks 302;

[0047] Specifically, by pushing the moving blocks 302 at both ends and through the tension of the spring wire 303, several groups of moving blocks 302 drive the light-emitting mechanisms 304 to move synchronously with equal gaps, so as to adjust the positions of several groups of light-emitting mechanisms 304, and then cooperate with the slider 5 to drive the adjustment column 301 to move, so as to achieve the horizontal and vertical two-way position adjustment of the light-emitting mechanism 304. On the one hand, the area where the light-emitting mechanism 304 is located is changed to achieve regional dimming, and on the other hand, the gap of the light-emitting mechanism 304 is changed to achieve the adjustment of the luminous density.

[0048] For example, Figure 5 shown.

[0049] The moving block 302 is provided with a sliding hole 3021, and the sliding hole 3021 is movably fitted with the adjusting column 301. The top of the moving block 302 is provided with a threaded hole 3022, and the bottom end of the inner wall of the threaded hole 3022 is provided with a first conductive sheet 3023. The side wall of the moving block 302 is provided with a second conductive sheet 3024, and the second conductive sheet 3024 is electrically connected to one end of an adjacent group of spring wires 303. An insulated wire 3025 is electrically connected between the second conductive sheet 3024 and the first conductive sheet 3023, and the insulated wire 3025 is embedded in the moving block 302. The bottom end of the moving block 302 is fixedly connected with a magnetic block 3026, and the magnetic block 3026 attracts the electromagnetic plate 2 after power is turned on.

[0050] The light-emitting mechanism 304 includes a threaded shaft 3041, a conductive block 3042 is provided at the bottom end of the threaded shaft 3041, the conductive block 3042 is in contact with the first conductive sheet 3023, a conical reflector 3043 is fixedly connected to the top end of the threaded shaft 3041, a reflective sheet 3044 is paved on the inner wall of the conical reflector 3043, a lamp bead 3045 is installed at the center of the bottom end of the inner wall of the conical reflector 3043, and the lamp bead 3045 is electrically connected to the conductive block 3042;

[0051] Specifically, by rotating the threaded shaft 3041, the conductive block 3042 is brought into contact with the first conductive sheet 3023 to complete the installation of the light-emitting mechanism 304. The second conductive sheet 3024 and the first conductive sheet 3023 are made conductive through the spring wire 303 to realize power supply to the lamp bead 3045. By connecting several groups of spring wires 303 in parallel, a group of lamp beads 3045 can be discovered and replaced in time after a fault occurs.

[0052] For example, Figure 6-8 shown.

[0053] The adjusting column 301 is provided with an adjusting slot 3011 inside, and a rotating shaft 305 is fixedly connected to the inner wall of the adjusting slot 3011, and a plurality of rotating disks 306 are fixedly connected to the rotating shaft 305, and a protrusion 307 is fixedly connected to the rotating disk 306, and a linkage rod 308 is rotatably connected to the protrusion 307, and a plurality of limiting slots 3012 are provided on the adjusting column 301, and the plurality of limiting slots 3012 are interconnected with the adjusting slot 3011, and a sliding rod 309 is slidably connected in the plurality of limiting slots 3012, and the bottom ends of the plurality of sliding rods 309 are rotatably connected to one end of a corresponding group of linkage rods 308, and a wedge-shaped limiting block 310 is fixedly connected to one end of the sliding rod 309, and a second spring 311 is arranged between the wedge-shaped limiting block 310 and the inner wall of the limiting slot 3012, and the second spring 311 is sleeved on the sliding rod 309;

[0054] The rotating shaft 305 is fixedly connected with a first bevel gear 312, the first bevel gear 312 is meshed with a second bevel gear 313, a transmission shaft 314 is fixedly connected at the center of the second bevel gear 313, and one end of the transmission shaft 314 passes through the adjustment column 301 and is fixedly connected with a knob 315;

[0055] Specifically, by rotating the knob 315, the transmission shaft 314 drives the second bevel gear 313 to rotate synchronously, and the first bevel gear 312 drives the rotating shaft 305 to rotate, so that the several groups of turntables 306 rotate synchronously, and the linkage rod 308 drives the sliding rod 309 to move downward, so that the wedge-shaped limit block 310 enters the limit groove 3012, and the position of the moving block 302 is adjusted at this time. After the position adjustment of the moving block 302 is completed, the knob 315 is released. Due to the tension of the second spring 311, the wedge-shaped limit block 310 moves upward to the outside of the limit groove 3012, and the adjacent group of moving blocks 302 are clamped to fix their positions.

[0056] For example, Fig. 9 and Fig.10 shown.

[0057] By adjusting the position of the light-emitting mechanism 304, the position of the light-emitting area can be changed as shown in the figure. For example, the light-emitting area can appear at the corner, center, and surrounding of the base plate 1, thereby realizing flexible adjustment of the position of the light-emitting area. When the gap of the light-emitting mechanism 304 changes, the light-emitting density can be adjusted.

[0058] The working principle of the regional dimming backlight module proposed by the present invention is as follows:

[0059] By fixing a group of light source assemblies 3 between two groups of opposite sliders 5, the two groups of sliders 5 can drive the light source assemblies 3 to move synchronously while moving, and the position of the light source assemblies 3 can be adjusted. By the tension of several groups of first springs 6, when one group of sliders 5 is pushed to move, the remaining groups of sliders 5 can keep the same gap and move synchronously, so that the position adjustment of the light source assemblies 3 is more efficient, and the light emitted by the light source assemblies 3 is more uniform.

[0060] By pulling the clamping block 9, the slider 5 is moved synchronously, which makes the position adjustment of the slider 5 more convenient. After the position adjustment is completed, the clamping block 9 is pushed to make the clamping block 9 clamp into a corresponding set of clamping grooves 104 to limit the slider 5, thereby fixing the position of the light source assembly 3. The position of the light source assembly 3 can be adjusted by pulling the clamping block 9 to disengage it from the clamping groove 104.

[0061] By pushing the moving blocks 302 at both ends and through the tension of the spring wire 303, several groups of moving blocks 302 drive the light-emitting mechanisms 304 to move synchronously with equal gaps, so as to adjust the positions of several groups of light-emitting mechanisms 304. Then, the slider 5 drives the adjustment column 301 to move, so as to achieve the bidirectional position adjustment of the light-emitting mechanisms 304 in the horizontal and vertical directions. On the one hand, the area where the light-emitting mechanisms 304 are located is changed to achieve regional dimming. On the other hand, the gaps of the light-emitting mechanisms 304 are changed to achieve the adjustment of the luminous density.

[0062] By rotating the threaded shaft 3041, the conductive block 3042 is brought into contact with the first conductive sheet 3023 to complete the installation of the light-emitting mechanism 304. The second conductive sheet 3024 and the first conductive sheet 3023 are made conductive through the spring wire 303 to realize power supply to the lamp bead 3045. By connecting several groups of spring wires 303 in parallel, a group of lamp beads 3045 can be discovered and replaced in time after a fault occurs.

[0063] By rotating the knob 315, the transmission shaft 314 drives the second bevel gear 313 to rotate synchronously, and the first bevel gear 312 drives the rotating shaft 305 to rotate, so that the several groups of turntables 306 rotate synchronously, and the linkage rod 308 drives the sliding rod 309 to move downward, so that the wedge-shaped limit block 310 enters the limit groove 3012. At this time, the position of the moving block 302 is adjusted. After the position adjustment of the moving block 302 is completed, the knob 315 is released. Due to the tension of the second spring 311, the wedge-shaped limit block 310 moves upward to the outside of the limit groove 3012, and the adjacent group of moving blocks 302 are clamped to fix their positions.

[0064] By adjusting the position of the light-emitting mechanism 304, the position of the light-emitting area can be changed. For example, the light-emitting area can appear at the corner, center, or surrounding of the base plate 1, thereby realizing flexible adjustment of the position of the light-emitting area. When the gap of the light-emitting mechanism 304 changes, the light-emitting density can be adjusted.

[0065] When the light source assembly 3 is powered on for operation, the electromagnetic plate 2 is also powered on synchronously, so that the electromagnetic plate 2 generates magnetism, which generates an attractive force on the bottom end of the light source assembly 3, making the light source assembly 3 more stable during operation, and preventing the light source assembly 3 from moving or tilting and affecting the light guiding effect. When the power supply of the light source assembly 3 is cut off, the electromagnetic plate 2 is also powered off synchronously, so that it loses its attractive force on the light source assembly 3, thereby facilitating the regional dimming operation of the light source assembly 3.

[0066] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A local dimming backlight module, comprising a base plate (1), characterized in that: The bottom plate (1) is provided with a groove (101), and a plurality of groups of light source components (3) are arranged in the groove (101); The inner walls of both sides of the groove (101) are provided with first sliding grooves (102), the inner walls of the first sliding grooves (102) are provided with sliding shafts (4), and the sliding shafts (4) are slidably connected with a plurality of groups of sliding blocks (5); The light source assembly (3) comprises an adjustment column (301), and two ends of the adjustment column (301) are respectively fixedly connected to two groups of sliders (5); The adjusting column (301) is slidably connected to a plurality of groups of moving blocks (302), and each of the plurality of groups of moving blocks (302) is provided with a light emitting mechanism (304); By pushing the moving blocks (302) at both ends, the plurality of moving blocks (302) drive the light-emitting mechanisms (304) to move synchronously and evenly, thereby adjusting the positions of the plurality of light-emitting mechanisms (304). The slider (5) then drives the adjusting column (301) to move, thereby adjusting the positions of the light-emitting mechanisms (304) in both the horizontal and vertical directions, thereby adjusting the positions of the light-emitting areas. The outer walls on both sides of the bottom plate (1) are provided with second slide grooves (103), two groups of the second slide grooves (103) are respectively connected to a corresponding group of first slide grooves (102), a first spring (6) is provided between each two adjacent groups of sliders (5), and a plurality of groups of the first springs (6) are sleeved on the slide shaft (4); One end of the slider (5) is fixedly connected to a linkage shaft (7), the linkage shaft (7) passes through the side wall of the bottom plate (1) and is fixedly connected to a limit block (8), the linkage shaft (7) is movably fitted with the second slide groove (103), a clamping block (9) is sleeved on the linkage shaft (7), and the outer side wall of the bottom plate (1) is provided with a plurality of groups of clamping grooves (104), and the plurality of groups of clamping grooves (104) are respectively movably clamped with a corresponding group of clamping blocks (9); An adjusting groove (3011) is provided inside the adjusting column (301), a rotating shaft (305) is fixedly connected to the inner wall of the adjusting groove (3011), a plurality of rotating disks (306) are fixedly connected to the rotating shaft (305), a convex block (307) is fixedly connected to the rotating disk (306), and a linkage rod (308) is rotatably connected to the convex block (307); The adjusting column (301) is provided with a plurality of groups of limiting grooves (3012), and the plurality of groups of limiting grooves (3012) are interconnected with the adjusting groove (3011), and a sliding rod (309) is slidably connected in the plurality of groups of limiting grooves (3012), and the bottom ends of the plurality of groups of sliding rods (309) are respectively rotatably connected with one end of a corresponding group of linkage rods (308), and one end of the sliding rod (309) is fixedly connected with a wedge-shaped limiting block (310), and a second spring (311) is provided between the wedge-shaped limiting block (310) and the inner wall of the limiting groove (3012), and the second spring (311) is sleeved on the sliding rod (309); The rotating shaft (305) is fixedly connected with a first bevel gear (312), the first bevel gear (312) is meshedly connected with a second bevel gear (313), the center of the second bevel gear (313) is fixedly connected with a transmission shaft (314), and one end of the transmission shaft (314) passes through the adjustment column (301) and is fixedly connected with a knob (315).

2. The local dimming backlight module according to claim 1, characterized in that: A reflective sheet, a light guide plate and a diffuser are laid on the bottom plate (1); an electromagnetic plate (2) is arranged at the bottom end of the inner wall of the groove (101); the electromagnetic plate (2) is electrically connected to a power source; and the bottom ends of the plurality of groups of light source assemblies (3) are movably fitted to the electromagnetic plate (2).

3. The local dimming backlight module according to claim 1, characterized in that : Spring wires (303) are arranged between the plurality of groups of moving blocks (302), and the plurality of groups of spring wires (303) are covered with insulating layers. The plurality of groups of spring wires (303) are connected in parallel, and a sliding hole (3021) is provided on the moving block (302), and the sliding hole (3021) is movably fitted with the adjusting column (301).

4. The local dimming backlight module according to claim 3, characterized in that: The top of the moving block (302) is provided with a threaded hole (3022), the threaded hole (3022) is threadedly connected to the light-emitting mechanism (304), the bottom end of the inner wall of the threaded hole (3022) is provided with a first conductive sheet (3023), the side wall of the moving block (302) is provided with a second conductive sheet (3024), the second conductive sheet (3024) is electrically connected to one end of an adjacent group of spring wires (303), an insulated wire (3025) is electrically connected between the second conductive sheet (3024) and the first conductive sheet (3023), the insulated wire (3025) is embedded in the moving block (302), and the bottom end of the moving block (302) is fixedly connected with a magnetic block (3026).

5. The local dimming backlight module according to claim 4, characterized in that: The light-emitting mechanism (304) comprises a threaded shaft (3041), the threaded shaft (3041) is threadedly connected to the threaded hole (3022), a conductive block (3042) is arranged at the bottom end of the threaded shaft (3041), the conductive block (3042) and the first conductive sheet (3023) are in contact with each other, a conical reflector (3043) is fixedly connected to the top end of the threaded shaft (3041), a reflective sheet (3044) is paved on the inner wall of the conical reflector (3043), a lamp bead (3045) is installed at the center of the bottom end of the inner wall of the conical reflector (3043), and the lamp bead (3045) is electrically connected to the conductive block (3042).

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