Backlight module of liquid crystal display

Abstract

The invention provides a liquid crystal display backlight module and relates to the field of displayers, the liquid crystal display backlight module comprises a light leakage prevention bracket, a hard back plate is clamped to the upper surface of the light leakage prevention bracket, a T-shaped butt joint frame is clamped to one end of the hard back plate, a reflecting plate is fixed to the upper surface of the hard back plate, and a light splitting plate is attached to the upper surface of the reflecting plate; a widened flexible light changing section is reserved at the end, close to the T-shaped butt joint frame, of the light splitting plate. A U-shaped light gathering plate and a second light gathering plate are pasted to the upper surface and the lower surface of the flexible light changing section respectively, and the same lamp tube fixing base is fixed to the ends, away from the hard back plate, of the U-shaped light gathering plate and the second light gathering plate. According to the invention, through the arrangement of the flexible light changing section which can be bent by the traction mechanism, the flexible light changing section which is tightly attached to the lower surface of the prism film can be separated from the lamp tube fixing seat only by pulling the pull rope downwards when the lamp tube fixing seat is heated abnormally due to long-time light emitting, so that the heat dissipation space is increased.

Description

Technical Field

[0001] The present invention relates to the field of displays, and in particular to a backlight module of a liquid crystal display. Background Art

[0002] The backlight module plays a vital role in liquid crystal display devices such as mobile phones, televisions, and monitors. Its main function is to provide the necessary light source for the display. The display itself does not have the ability to emit light. It relies on the backlight module to generate light, and then adjusts the light transmission and blocking through the liquid crystal panel to display images or text.

[0003] After searching the prior art, it is found that the backlight modules basically tightly fit together various film plates used for light diffusion and light focusing in the module to achieve stable luminous and focusing effects. This luminous mode requires reducing the luminous power or turning on the external heat dissipation device when the screen brightness needs to be dimmed after using the mobile phone at high brightness for a long time. Otherwise, the film layer near the contact point of the light source will be affected by the high temperature, and even cause bubbling and other defects caused by high temperature.

[0004] Therefore, we have made improvements to the situation that permanent bonding is prone to affect the service life of the scattered light component due to the heat generated by the light-emitting component, and proposed a liquid crystal display backlight module. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the existing permanent lamination installation method is prone to affect the service life of the light-scattering component due to the heat generated by the light-emitting component.

[0006] In order to achieve the above-mentioned purpose of the invention, the present invention provides a liquid crystal display backlight module to improve the above-mentioned problem.

[0007] The specific application is as follows: It includes an anti-light leakage bracket, the upper surface of which is clamped with a hard backboard, one end of which is clamped with a T-shaped docking frame, and a reflector is fixed on the upper surface of the hard backboard, a beam splitter is attached to the reflector, and a widened flexible light-changing section is reserved at one end of the beam splitter close to the T-shaped docking frame; and a U-shaped focusing plate and a second focusing plate are respectively adhered to the upper and lower surfaces of the flexible light-changing section, and the ends of the U-shaped focusing plate and the second focusing plate away from the hard backboard are fixed with the same lamp tube fixing seat, and a light source structure is arranged on the side of the lamp tube fixing seat close to the flexible light-changing section; a prism film 1 is adhered to the upper surface of the beam splitter, and the prism film 1 extends from one end of the T-shaped docking frame to the end of the T-shaped docking frame away from the hard backboard at the lower edge of one end; prism film 2 is pasted on the upper surface of prism film 1, and the focusing directions of prism film 1 and prism film 2 are perpendicular to each other, one gathers the light scattered to the left and right sides vertically upward, and the other gathers the light scattered to the front and rear sides vertically upward; the span of the inner notch of the U-shaped focusing plate is equal to the width of prism film 1; it is ensured that at any angle of the flexible dimming section, a part of the light will be scattered upward from the inner notch of the U-shaped focusing plate and illuminate the area of ​​prism film 1 close to the T-shaped docking frame; a rope fixing block is fixed to the middle part of the back side of the lamp tube fixing seat; a combined mounting frame is fixed to one end of the lower surface of the hard back plate close to the flexible dimming section, and a traction mechanism is arranged on the combined mounting frame, and the traction mechanism includes a pull rope fixed to the rope fixing block.

[0008] As a preferred technical solution of the present invention, the U-shaped focusing plate and the second focusing plate are both provided with a reflective surface on the opposite side, and the U-shaped focusing plate and the second focusing plate are both made of tough materials, and the side of the U-shaped focusing plate and the second focusing plate close to the flexible light-changing section is tightly adhered to the surface of the flexible light-changing section; through such a setting, it can be ensured that when the rope fixing block is pulled downward, the flexible light-changing section will not be directly broken, but will slowly bend into an arc structure, ensuring that the light can always be refracted forward from the flexible light-changing sections with different degrees of bending.

[0009] As a preferred technical solution of the present invention, the combined mounting frame includes a flat plate and an intermediate rib plate fixed vertically in the middle of the flat plate, a strip plate for fixing to a hard back plate is reserved at the top end of the intermediate rib plate, and a plurality of through holes are opened on the strip plate; a plurality of studs matching the corresponding through holes are fixed on the lower surface of the hard back plate, and the bottom ends of the studs located below the strip plate are screwed with self-locking nuts; two symmetrical spring fixing rods are fixed to one side of the top end of the intermediate rib plate close to the T-shaped docking frame, and the ends of the two spring fixing rods are both connected with reset springs, and a ball is fixed to one end of the reset spring close to the lamp tube fixing seat, and the surface of the reset spring is tightly against the lower surface of the second focusing plate.

[0010] As a preferred technical solution of the present invention, the hard back panel, reflective plate, beam splitter, prism film 1, prism film 2 and diffuser plate are all provided with camera slots of the same size and position in the middle of one end away from the T-shaped docking frame, and a rectangular through hole is provided in the middle of the side of the lamp tube fixing seat away from the light source structure, in which a circuit board module is fixed; it is used to connect the power supply and control the brightness of the light source.

[0011] As a preferred technical solution of the present invention, the lower surface of the edge of the T-shaped docking frame away from one end of the hard backboard is reserved with an adhesive surface; and the upper surface of the prism film one is close to the end of the adhesive surface and is reserved with an adhesive strip, and the adhesive strip is bonded and fixed to the lower surface of the adhesive surface; the end of the T-shaped docking frame close to the hard backboard is reserved with a C-shaped pocket rod with an opening concave upward, and the side of the C-shaped pocket rod is provided with a plurality of rectangular holes; the end of the hard backboard close to the T-shaped docking frame is reserved with protruding tenons corresponding to the rectangular holes one by one; during installation, the end gaps of the protruding tenons can be further welded and reinforced; the thickness of the hard backboard is equal to the width and thickness of the C-shaped pocket rod, that is, it is ensured that there are no high and low edges at the junction of the upper surface of the hard backboard, so that the lower surface of the beam splitter laid above it can remain straight and smooth, thereby improving the light guiding efficiency.

[0012] As a preferred technical solution of the present invention, the anti-light leakage bracket includes two long side guard strips parallel to each other, and the length of the two long side guard strips is equal to the length of the hard backboard, two cross beams are fixed between the lower surfaces of the two long side guard strips, and the two cross beams are provided with positioning holes; the lower surface of the hard backboard is reserved with positioning convex shafts adapted to the corresponding positioning holes to ensure that the hard backboard will not produce horizontal displacement after being clamped with the anti-light leakage bracket; the two ends of the two long side guard strips are located on the lower surface of the hard backboard and are fixed with a top pocket plate 1 and a bottom corner pocket plate 2 to prevent the two ends of the hard backboard from warping; the two A bottom corner extension support block is reserved at one end of the long side guard strip close to the C-shaped pocket rod, and the bottom corner extension support block is fixed to the end of the lower surface of the C-shaped pocket rod, and connecting screw holes for fixed connection with the bottom corner extension support block are provided near both ends of the lower surface of the C-shaped pocket rod; protrusions mounted on the long side guard strips are reserved at one end of the T-shaped docking frame close to the two long side guard strips, and screw connection holes are provided on the protrusions, and the protrusions are fixed to the anti-light leakage bracket by screws; the anti-light leakage bracket, the combined mounting frame and the T-shaped docking frame are tightly installed by mortise and tenon welding and screw fixing, thereby improving the integrated fixing effect.

[0013] As a preferred technical solution of the present invention, arc-shaped light-focusing grooves are formed on opposite sides of the two long side guard strips of the anti-light leakage bracket, and the bottoms of the arc-shaped light-focusing grooves are polished.

[0014] As a preferred technical solution of the present invention, the thicknesses at both ends of the beam splitter are different, and the thickness of the beam splitter at one end close to the flexible light-changing section is greater than the thickness at the other end; the thicknesses at both ends of the reflector are different, and the thickness of the reflector at one end close to the flexible light-changing section is less than the thickness of the end close to the camera slot, and after the reflector is superimposed on the beam splitter, the upper surface of the beam splitter remains horizontal; by providing a beam splitter with an increased thickness at one end close to the light source, the light transmission rate can be improved, and more light can be evenly scattered and propagated to various positions of the beam splitter.

[0015] As a preferred technical solution of the present invention, a middle notch is opened in the middle of one end of the flat plate of the combined mounting frame close to the T-shaped docking frame, and the traction mechanism also includes fixed pulley seats fixed on both sides of the middle notch near the ports, coaxial wear-resistant slip rings are respectively embedded in the middle of the two fixed pulley seats, and the same short shaft is rotatably connected between the two wear-resistant slip rings, and a fixed pulley is sleeved and fixed in the middle of the short shaft; an annular groove is opened on the circumferential outer wall of the fixed pulley; the upper surface of the flat plate of the combined mounting frame is respectively fixed with mutually symmetrical shaft rod seats on both sides of the middle notch, and the two shafts A rope winding roller is rotatably connected between the top ends of the rod seats; the pull rope passes over the fixed pulley and is fixed on the circumferential outer wall of the rope winding roller, and is wound around the circumferential outer wall of the rope winding roller; the shaft rod seat and the rope winding roller are both located on the side of the middle rib plate away from the T-shaped docking frame; a folding fixing platform is reserved at one end of the flat plate of the combined mounting frame away from the T-shaped docking frame, and a micro servo motor is fixed on the upper surface of the folding fixing platform; a worm sleeve is fixed to the top end of the output shaft of the micro servo motor; and a worm gear ring is sleeved on the end of the rope winding roller close to the worm sleeve; the worm gear ring and the worm sleeve are meshed with each other.

[0016] As a preferred technical solution of the present invention, the outer wall of the reset spring is sleeved with a rubber protective sleeve, which can prevent the reset spring from scratching the second focusing plate when bending and stretching.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. In order to solve the problem of poor heat dissipation when the lamps are attached together in the prior art, the present application provides a flexible dimming section that can be bent by a traction mechanism. When the lamp holder is abnormally heated due to long-term lighting, the flexible dimming section and the lamp holder tightly attached to the lower surface of the prism film can be separated from the lamp holder by simply pulling the pull rope downward, thereby increasing the heat dissipation space. At the same time, the original direct light that can reach the other end of the beam splitter is changed to a curved refraction, and the light is greatly attenuated, so that the screen brightness is automatically dimmed, which can also achieve the effect of dimming the screen; 2. In order to solve the problem of easy light leakage from the side in the prior art, the present application provides an anti-light leakage bracket with a light-collecting groove. When in use, the light scattered to the side by the beam splitter is gathered again into the inside of the beam splitter to prevent the light from being refracted from the side, thereby improving the anti-light leakage effect; 3. Through the lifting and resetting of the two reset springs, combined with the overall toughness of the focusing plate 2, the non-arc bending phenomenon can be effectively prevented when the flexible dimming section is bent, ensuring that the light can be transmitted smoothly, solving the problem that the flexible dimming section is easily bent when it is bent; 4. By setting a rope winding roller driven by a worm gear, when the flexible light-changing section is bent, it can stop at any arc and form a stable self-locking, without setting a positioning mechanism and is not affected by the position direction of the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the overall structure of a liquid crystal display backlight module provided in this application; Figure 2 A side view of a liquid crystal display backlight module provided in the present application; Figure 3 A front view of the bottom of a liquid crystal display backlight module provided in this application; Figure 4 A liquid crystal display backlight module provided for this application Figure 3 Schematic diagram of the cross-sectional structure along line AA; Figure 5 A liquid crystal display backlight module provided for this application Figure 4 The enlarged view of point B in the middle; Figure 6 A schematic diagram of the exploded structure of a traction mechanism and a prism film in a liquid crystal display backlight module provided in the present application; Figure 7 A liquid crystal display backlight module provided for this application Figure 6 Another perspective structural diagram of the exploded view; Figure 8 A schematic diagram of the assembly structure of a hard back plate and a reflective plate in a liquid crystal display backlight module provided in the present application; Fig. 9 A schematic diagram of the three-dimensional structure of a hard back plate in a liquid crystal display backlight module provided in the present application; Fig.10 An assembly diagram of a light leakage prevention bracket in a liquid crystal display backlight module provided in the present application; Fig.11 A schematic diagram of the three-dimensional structure of a combined mounting frame in a liquid crystal display backlight module provided in the present application.

[0019] Indicated in the figure: 1. Anti-light leakage bracket; 101. Horizontal support beam; 102. Top pocket plate 1; 103. Bottom corner pocket plate 2; 104. Arc-shaped focusing groove; 105. Positioning hole; 106. Bottom corner extension bracket; 2. Prism film 1; 201. Adhesive strip; 3. Prism film 2; 4. Diffuser; 5. Camera notch; 6. Positioning cam; 7. Traction mechanism; 701. Shaft seat; 702. Rope roller; 703. Micro servo motor; 704. Fixed pulley; 705. Pull rope; 706. Worm sleeve; 707. Fixed pulley seat; 708. Worm wheel ring; 8. Combined mounting frame; 80 1. Through hole 1; 802. Spring fixing rod; 803. Folding fixing platform; 804. Middle notch; 9. Circuit board module; 10. Reset spring; 11. Lamp tube fixing seat; 12. Light source structure; 13. U-shaped focusing plate; 14. Focusing plate 2; 15. T-shaped docking frame; 151. Rectangular jack; 152. C-shaped pocket rod; 153. Adhesive hemp surface; 154. Connecting screw hole; 16. Beam splitter; 161. Flexible dimming section; 17. Self-locking nut; 18. Stud; 19. Hard back panel; 191. Protruding tenon; 20. Rope fixing block; 21. Reflector. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme 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 only 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 should fall within the scope of protection of the present invention.

[0021] As described in the background art, this permanent bonding is prone to affecting the service life of the light-scattering component due to the heat generated by the light-emitting component.

[0022] In order to solve this technical problem, the present invention provides a liquid crystal display backlight module, which is applied to a mobile phone display backlight module.

[0023] Specifically, please refer to Figure 1-Figure 11 , the liquid crystal display backlight module specifically includes: The light leakage prevention bracket 1 has a hard back plate 19 clamped on its upper surface, one end of which is clamped on a T-shaped docking frame 15, and a reflector 21 is fixed on the upper surface of the hard back plate 19, a beam splitter 16 is attached to the reflector 21, and a widened flexible light-changing section 161 is reserved at one end of the beam splitter 16 close to the T-shaped docking frame 15, and the width of the flexible light-changing section 161 is greater than the width of the hard back plate 19; and a U-shaped focusing plate 13 and a focusing plate 14 are respectively adhered to the upper and lower surfaces of the flexible light-changing section 161, and the ends of the U-shaped focusing plate 13 and the focusing plate 14 away from the hard back plate 19 are fixed with the same lamp fixing seat 11, and a light source structure 12 is arranged on the side of the lamp fixing seat 11 close to the flexible light-changing section 161; a prism film 2 is adhered to the upper surface of the beam splitter 16, and the end of the prism film 2 close to the T-shaped docking frame 15 extends all the way to the bottom of the flexible light-changing section 161; It extends to the lower edge of one end of the T-shaped docking frame 15 away from the hard back plate 19; a prism film 23 is pasted on the upper surface of the prism film 2, and the focusing directions of the prism film 2 and the prism film 23 are perpendicular to each other, one collects the light scattered to the left and right sides vertically upward, and the other collects the light scattered to the front and rear sides vertically upward; the span of the inner notch of the U-shaped focusing plate 13 is equal to the width of the prism film 2; it ensures that at any angle, a part of the light of the flexible dimming section 161 will be scattered upward from the inner notch of the U-shaped focusing plate 13 and illuminate the area of ​​the prism film 2 close to the T-shaped docking frame 15; a rope fixing block 20 is fixed to the middle part of the back side of the lamp tube fixing seat 11; a combined mounting frame 8 is fixed to one end of the lower surface of the hard back plate 19 close to the flexible dimming section 161, and a traction mechanism 7 is provided on the combined mounting frame 8, and the traction mechanism 7 includes a pull rope 705 fixed on the rope fixing block 20.

[0024] The present invention provides a liquid crystal display backlight module, which is provided with a flexible light-changing section 161 that can be bent by a traction mechanism 7. When a long-term light emission causes abnormal heating of a lamp tube fixing seat 11, the flexible light-changing section 161 and the lamp tube fixing seat 11 that are tightly attached to the lower surface of the prism film 2 can be separated from it by simply pulling the pull rope 705 downward, thereby increasing the heat dissipation space. At the same time, the original state of direct light that can reach the other end of the splitter plate 16 is changed to curved refraction, and the light is greatly attenuated, so that the screen brightness is automatically dimmed, which can also achieve the effect of dimming the screen.

[0025] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] Example 1, please refer to Figure 1-Figure 4 A liquid crystal display backlight module, wherein a U-shaped focusing plate 13 and a second focusing plate 14 are provided with a reflective surface on opposite sides thereof, and the U-shaped focusing plate 13 and the second focusing plate 14 are both made of tough material, and the side of the U-shaped focusing plate 13 and the second focusing plate 14 close to the flexible light-changing section 161 is tightly adhered to the surface of the flexible light-changing section 161.

[0029] By such a configuration, it can be ensured that when the rope fixing block 20 is pulled downward, the flexible light-changing section 161 will not be directly broken, but will be slowly bent into an arc structure, ensuring that light can always be refracted forward from the flexible light-changing sections 161 with different bending degrees.

[0030] The combined mounting frame 8 includes a flat plate and an intermediate rib plate fixed vertically in the middle of the flat plate, a strip plate for fixing to a hard back plate 19 is reserved at the top of the intermediate rib plate, and a plurality of through holes 801 are opened on the strip plate; a plurality of studs 18 matching the corresponding through holes 801 are fixed to the lower surface of the hard back plate 19, and the bottom ends of the studs 18 located below the strip plate are all screwed with self-locking nuts 17; two symmetrical spring fixing rods 802 are fixed to one side of the top of the intermediate rib plate close to the T-shaped docking frame 15, and the ends of the two spring fixing rods 802 are both plugged with reset springs 10, and the ends of the reset springs 10 close to the lamp tube fixing seat 11 are both fixed with a ball, and the surface of the reset spring 10 is tightly against the lower surface of the focusing plate 14; through the support and reset of the two reset springs 10, in conjunction with the focusing plate 14 having a certain toughness as a whole, the non-arc bending phenomenon can be effectively prevented when the flexible dimming section 161 is bent, thereby ensuring that the light can be transmitted smoothly.

[0031] Please refer to Figure 1-Figure 4 A liquid crystal display backlight module, wherein a hard back plate 19, a reflector 21, a beam splitter 16, a prism film 1 2, a prism film 2 3 and a diffuser 4 are all provided with camera slots 5 of the same size and position in the middle of one end away from a T-shaped docking frame 15, and a lamp tube fixing seat 11 is provided with a rectangular through hole in the middle of one side away from a light source structure 12, and a circuit board module 9 is fixed in the rectangular through hole; it is used to connect the power supply and control the brightness of the light source.

[0032] Embodiment 2 further optimizes a liquid crystal display backlight module provided in embodiment 1. Specifically, Figure 8-Figure 10As shown, the lower surface of the edge of the T-shaped docking frame 15 away from the hard back plate 19 is reserved with an adhesive surface 153; and the upper surface of the prism film 2 is close to the adhesive surface 153. The adhesive strip 201 is bonded and fixed to the lower surface of the adhesive surface 153; the end of the T-shaped docking frame 15 close to the hard back plate 19 is reserved with a C-shaped pocket rod 152 with an opening upward and concave, and the side of the C-shaped pocket rod 152 is opened with a plurality of rectangular sockets 15 1; a protruding tenon 191 corresponding to the rectangular jack 151 is reserved at one end of the hard back plate 19 close to the T-shaped docking frame 15; during installation, the end gap of the protruding tenon 191 can be welded and reinforced; the thickness of the hard back plate 19 is equal to the width and thickness of the C-shaped pocket rod 152, that is, to ensure that there are no high and low edges on the upper surface of the hard back plate 19 at the junction, so that the lower surface of the beam splitter 16 laid thereon remains straight and smooth, thereby improving the light guiding efficiency.

[0033] Further, such as Figure 8-Figure 10 As shown, the light leakage prevention bracket 1 includes two long side guards parallel to each other, and the length of the two long side guards is equal to the length of the hard backboard 19, two cross beams 101 are fixed between the lower surfaces of the two long side guards, and the two cross beams 101 are provided with positioning holes 105; the lower surface of the hard backboard 19 is reserved with positioning convex shafts 6 adapted to the corresponding positioning holes 105; ensure that the hard backboard 19 will not produce horizontal displacement after being clamped with the light leakage prevention bracket 1; the two ends of the two long side guards are located on the lower surface of the hard backboard 19, and the top pocket plate 102 and the bottom corner pocket plate are fixed Board 2 103; prevent the two ends of the hard backboard 19 from warping; the two long side guards are close to the end of the C-shaped pocket rod 152 and the bottom corner extension bracket 106 is reserved, and the bottom corner extension bracket 106 is fixed to the end of the lower surface of the C-shaped pocket rod 152, and the lower surface of the C-shaped pocket rod 152 is provided with connecting screw holes 154 for fixed connection with the bottom corner extension bracket 106 near both ends; the T-shaped docking frame 15 is close to the end of the two long side guards and is reserved with protrusions on the long side guards, and the protrusions are provided with screw holes, and the protrusions are fixed to the anti-light leakage bracket 1 by screws; By means of mortise and tenon welding and screw fixing, the light leakage prevention bracket 1, the combined mounting frame 8 and the T-shaped docking frame 15 are tightly installed to improve the integrated fixing effect.

[0034] Embodiment 3 further optimizes a liquid crystal display backlight module provided in Embodiment 1 or 2. Specifically, Figure 8 As shown, the two long side guard strips of the light leakage prevention bracket 1 are both provided with arc-shaped light focusing grooves 104 on opposite sides, and the bottom of the arc-shaped light focusing grooves 104 is polished; When in use, the light scattered to the side by the beam splitter 16 can be gathered again into the inside of the beam splitter 16 to prevent the light from being refracted from the side, thereby improving the light leakage prevention effect.

[0035] Further, such as Figure 8 As shown, the thicknesses at both ends of the beam splitter 16 are different, and the thickness of the beam splitter 16 at one end close to the flexible light-changing section 161 is greater than the thickness at the other end; the thicknesses at both ends of the reflective plate 21 are different, and the thickness of the reflective plate 21 at one end close to the flexible light-changing section 161 is less than the thickness of the end close to the camera slot 5, and after the reflective plate 21 is superimposed on the beam splitter 16, the upper surface of the beam splitter 16 remains horizontal; by setting the beam splitter 16 with an increased thickness at one end close to the light source, the light transmission rate can be improved, and more light can be evenly scattered and propagated to various positions of the beam splitter 16.

[0036] Embodiment 4: A liquid crystal display backlight module provided in the above embodiments is further optimized, such as Figure 1 , Figure 2 , Figure 4 , Fig.11 As shown, a middle notch 804 is provided in the middle of one end of the flat plate of the combined mounting frame 8 close to the T-shaped docking frame 15, and the traction mechanism 7 also includes fixed pulley seats 707 fixed on both sides of the middle notch 804 near the ports, coaxial wear-resistant slip rings are respectively embedded in the middle of the two fixed pulley seats 707, and the same short shaft is rotatably connected between the two wear-resistant slip rings, and a fixed pulley 704 is sleeved and fixed in the middle of the short shaft; an annular groove is provided on the circumferential outer wall of the fixed pulley 704; symmetrical shaft rod seats 701 are respectively fixed on the upper surface of the flat plate of the combined mounting frame 8 on both sides of the middle notch 804, and the same rope winding roller 702 is rotatably connected between the top ends of the two shaft rod seats 701; the pull rope 705 passes around the fixed pulley 704 and is fixed on the circumferential outer wall of the rope winding roller 702, and is wound around the circumferential outer wall of the rope winding roller 702; the shaft rod seat 701 and the rope winding roller 702 are both The middle rib is located on the side away from the T-shaped docking frame 15; a folding fixing platform 803 is reserved at one end of the flat plate of the combined mounting frame 8 away from the T-shaped docking frame 15, and a micro-servo motor 703 is fixed on the upper surface of the folding fixing platform 803; a worm sleeve 706 is fixed to the top of the output shaft of the micro-servo motor 703; and a worm gear ring 708 is sleeved on the end of the rope winding roller 702 close to the worm sleeve 706; the worm gear ring 708 and the worm sleeve 706 are meshed with each other; by setting a rope winding roller 702 driven by the worm sleeve 706 to wind the rope, it can be stopped at any arc and form a stable self-locking when the flexible light-changing section 161 is bent, without setting a positioning mechanism, and is not affected by the position and direction of the entire device; the outer wall of the reset spring 10 is sleeved with a rubber protective sleeve, which can prevent the reset spring 10 from scratching the focusing plate 14 when bending and stretching.

[0037] The use process of a liquid crystal display backlight module provided by the present invention is as follows: Working principle: Under normal working conditions, the U-shaped focusing plate 13 and focusing plate 2 14 holding the flexible light-changing section 161 and the lamp holder 11 at the ends of the two will be tightly attached to the lower surface of the prism film 1 2 under the action of the two reset springs 10; once the lamp holder 11 is abnormally heated due to long-term lighting, the temperature control device is triggered, and after issuing a command, the micro servo motor 703 in the traction mechanism 7 is controlled to operate, and at this time, the rope roller 702 can be driven to pull the pull rope 705, and then the flexible light-changing section 161 tightly attached to the lower surface of the prism film 2 is pulled. The light segment 161 and the lamp fixing seat 11 are pulled downward and separated from the prism film 2, thereby increasing the heat dissipation space; at the same time, the state that the original direct light can reach the other end of the beam splitter 16 is changed to a curved refraction, and the light is greatly attenuated, so that the screen brightness is automatically dimmed, and the screen can also be dimmed; the long side guard strips with arc-shaped focusing grooves 104 on both sides of the anti-light leakage bracket 1, when in use, the light scattered to the side by the beam splitter 16 is gathered again into the inside of the beam splitter 16, preventing the light from being refracted from the side, thereby improving the anti-light leakage effect.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific embodiments, or to perform equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of the present invention, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.

Claims

1. A liquid crystal display backlight module, characterized in that: The invention comprises a light leakage prevention bracket (1), wherein the upper surface of the light leakage prevention bracket (1) is clamped with a hard back plate (19), one end of the hard back plate (19) is clamped with a T-shaped docking frame (15), and a reflector (21) is fixed on the upper surface of the hard back plate (19), a light splitter (16) is attached to the upper surface of the reflector (21), and a widened flexible light-changing section (161) is reserved at one end of the light splitter (16) close to the T-shaped docking frame (15); and a U-shaped light-collecting plate (13) and a second light-collecting plate (14) are respectively adhered to the upper and lower surfaces of the flexible light-changing section (161), and the ends of the U-shaped light-collecting plate (13) and the second light-collecting plate (14) away from the hard back plate (19) are fixed with the same lamp fixing seat (11), and a side of the lamp fixing seat (11) close to the flexible light-changing section (161) is provided with A light source structure (12) is arranged; a prism film 1 (2) is adhered to the upper surface of the beam splitter (16), and the end of the prism film 1 (2) close to the T-shaped docking frame (15) extends all the way to the lower edge of the end of the T-shaped docking frame (15) away from the hard back plate (19); a prism film 2 (3) is adhered to the upper surface of the prism film 1 (2); the span of the inner notch of the U-shaped focusing plate (13) is equal to the width of the prism film 1 (2); a rope fixing block (20) is fixed to the middle of the back of the lamp tube fixing seat (11); a combined mounting frame (8) is fixed to the end of the lower surface of the hard back plate (19) close to the flexible light-changing section (161), and a traction mechanism (7) is arranged on the combined mounting frame (8), and the traction mechanism (7) includes a pull rope (705) fixed to the rope fixing block (20).

2. The liquid crystal display backlight module according to claim 1, characterized in that: The U-shaped light concentrator (13) and the second light concentrator (14) are both provided with a reflective surface on one side opposite to the other, and the U-shaped light concentrator (13) and the second light concentrator (14) are both made of a tough material, and the side of the U-shaped light concentrator (13) and the second light concentrator (14) close to the flexible light-changing section (161) is tightly adhered to the surface of the flexible light-changing section (161).

3. The liquid crystal display backlight module according to claim 1, characterized in that: The combined mounting frame (8) comprises a flat plate and an intermediate rib plate fixed vertically in the middle of the flat plate, the top of the intermediate rib plate is reserved with a strip plate for fixing to the hard back plate (19), and the strip plate is provided with a plurality of through holes (801); a plurality of studs (18) matching the corresponding through holes (801) are fixed to the lower surface of the hard back plate (19), and the bottom ends of the studs (18) located below the strip plate are screwed with self-locking nuts (17); two symmetrical spring fixing rods (802) are fixed to the top of the intermediate rib plate on one side close to the T-shaped docking frame (15), and the ends of the two spring fixing rods (802) are both plugged with reset springs (10), and the ends of the reset springs (10) close to the lamp tube fixing seat (11) are both fixed with a ball, and the surface of the reset spring (10) is tightly pressed against the lower surface of the second focusing plate (14).

4. The liquid crystal display backlight module according to claim 1, characterized in that: The hard back plate (19), the reflective plate (21), the beam splitter (16), the prism film 1 (2), the prism film 2 (3) and the diffuser plate (4) are all provided with camera slots (5) of the same size and position in the middle of one end away from the T-shaped docking frame (15), and the lamp tube fixing seat (11) is provided with a rectangular through hole in the middle of one side away from the light source structure (12), and a circuit board module (9) is fixed in the rectangular through hole.

5. The liquid crystal display backlight module according to claim 1, characterized in that: The lower surface of the edge of the T-shaped docking frame (15) at one end away from the hard back plate (19) is reserved with an adhesive surface (153); and the upper surface of the prism film (2) at one end close to the adhesive surface (153) is reserved with an adhesive strip (201), and the adhesive strip (201) is bonded and fixed to the lower surface of the adhesive surface (153); the end of the T-shaped docking frame (15) close to the hard back plate (19) is reserved with an opening upwardly concave The hard back plate (19) is provided with a C-shaped pocket rod (152), and a plurality of rectangular insertion holes (151) are formed on the side of the C-shaped pocket rod (152); a protruding tenon (191) corresponding to the rectangular insertion holes (151) is reserved at one end of the hard back plate (19) close to the T-shaped docking frame (15); the thickness of the hard back plate (19) is equal to the width and thickness of the C-shaped pocket rod (152), that is, it is ensured that the upper surface of the hard back plate (19) has no high or low edges at the junction.

6. The liquid crystal display backlight module according to claim 5, characterized in that: The light leakage prevention bracket (1) comprises two long side guard strips parallel to each other, and the length of the two long side guard strips is equal to the length of the hard back plate (19); two cross beams (101) are fixed between the lower surfaces of the two long side guard strips, and the two cross beams (101) are provided with positioning holes (105); the lower surface of the hard back plate (19) is reserved with positioning convex shafts (6) adapted to the corresponding positioning holes (105); the two ends of the two long side guard strips are located on the lower surface of the hard back plate (19) and are fixed with a top pocket plate 1 (102) and a bottom corner pocket plate 2 (103); the two A bottom corner extension support block (106) is reserved at one end of each of the long side guard strips near the C-shaped scoop rod (152), and the bottom corner extension support block (106) is fixed to the end of the lower surface of the C-shaped scoop rod (152), and connection screw holes (154) for fixed connection with the bottom corner extension support block (106) are provided near both ends of the lower surface of the C-shaped scoop rod (152); a protrusion mounted on the long side guard strip is reserved at one end of the T-shaped docking frame (15) near the two long side guard strips, and screw connection holes are provided on the protrusions, and the protrusions are fixed to the light leakage prevention bracket (1) by means of screws.

7. The liquid crystal display backlight module according to claim 6, characterized in that: The two long side guard strips of the light leakage prevention bracket (1) are both provided with arc-shaped light focusing grooves (104) on opposite sides thereof, and the bottom of the arc-shaped light focusing grooves (104) is polished.

8. The liquid crystal display backlight module according to claim 1, characterized in that: The thicknesses of the beam splitter (16) at both ends are different, and the thickness of the end of the beam splitter (16) close to the flexible light-changing section (161) is greater than the thickness of the other end; the thicknesses of the reflector (21) at both ends are different, and the thickness of the end of the reflector (21) close to the flexible light-changing section (161) is less than the thickness of the end close to the camera notch (5), and after the reflector (21) is superimposed on the beam splitter (16), the upper surface of the beam splitter (16) remains in a horizontal state.

9. The liquid crystal display backlight module according to claim 3, characterized in that: A middle notch (804) is provided in the middle of one end of the flat plate of the combined mounting frame (8) close to the T-shaped docking frame (15), and the traction mechanism (7) further comprises fixed pulley seats (707) fixed on both sides of the middle notch (804) close to the ports, coaxial wear-resistant slip rings are respectively embedded in the middle of the two fixed pulley seats (707), and a same short shaft is rotatably connected between the two wear-resistant slip rings, and a fixed pulley (704) is sleeved and fixed in the middle of the short shaft; an annular groove is provided on the circumferential outer wall of the fixed pulley (704); mutually symmetrical shaft rod seats (701) are respectively fixed on both sides of the middle notch (804) of the upper surface of the flat plate of the combined mounting frame (8), and a same rope winding roller (702) is rotatably connected between the top ends of the two shaft rod seats (701); The pull rope (705) passes over the fixed pulley (704) and is fixed on the circumferential outer wall of the rope winding roller (702), and is wound around the circumferential outer wall of the rope winding roller (702); the shaft rod seat (701) and the rope winding roller (702) are both located on the side of the middle rib plate away from the T-shaped docking frame (15); a folding fixing platform (803) is reserved at one end of the flat plate of the combined mounting frame (8) away from the T-shaped docking frame (15), and a micro servo motor (703) is fixed on the upper surface of the folding fixing platform (803); a worm sleeve (706) is fixed to the top end of the output shaft of the micro servo motor (703); and a worm wheel ring (708) is sleeved on one end of the rope winding roller (702) close to the worm sleeve (706); the worm wheel ring (708) and the worm sleeve (706) are meshed with each other.

10. The liquid crystal display backlight module according to claim 3, characterized in that: The outer wall of the return spring (10) is sleeved with a rubber protective sleeve.

Images