Backlight module for liquid crystal display screen

Abstract

The utility model relates to the technical field of liquid crystal display screens, in particular to a backlight module for a liquid crystal display screen, which comprises a back end cover, a plurality of lamp holders are arranged inside the back end cover, two sides of the plurality of lamp holders are tightly attached to the inner wall of the back end cover, and the plurality of lamp holders are equidistantly distributed along the inside of the back end cover. The two ends of the lamp holder are fixedly assembled with the back end cover through bolts respectively. A plurality of lamp holders are arranged in a back end cover, LED lamp beads serve as a light source assembly and can be installed on the lamp holders, a reflector is located between a light source and a light guide plate and used for reflecting light which is not captured by the light guide plate back to a system so as to improve the lighting effect and the brightness, and the light guide plate is used for evenly distributing light emitted by the light source to the back face of a whole screen. Uniform distribution of light is achieved through specific design and surface treatment, the diffusion film is located between the light guide plate and the liquid crystal layer and used for further uniformizing the light, and it is guaranteed that the brightness of all parts of the screen is consistent.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid crystal display screens, in particular to a backlight module for liquid crystal display screens. Background Art

[0002] Liquid crystal display is a flat-panel display technology that uses the optical properties of liquid crystal materials to display images. Liquid crystal displays are widely used in televisions, computer monitors, laptops, mobile phones, tablets, and other electronic devices.

[0003] The advantages of LCD include low power consumption, high contrast, wide viewing angle and high resolution. LCD is one of the most common and widely used display technologies.

[0004] The backlight module of a liquid crystal display (LCD) is one of its key components, responsible for providing the necessary light source to make the image on the screen visible.

[0005] The quality of the backlight unit directly affects the display effect of the LCD screen, including brightness, color saturation and uniformity. Therefore, high-quality backlight units are crucial for high-end monitors, TVs and other display devices.

[0006] At present, when the LCD screen does not display the picture content, in most cases there is a problem with the light source in the backlight module. These light sources are composed of multiple LED lamp beads. Under normal circumstances, when fixing the LED lamp beads, most of them are fixed by welding. In this way, when there is a problem with the light source, it is not only inconvenient to check the problematic LED lamp beads, but also difficult to replace the LED lamp beads after the problem is eliminated. Utility Model Content

[0007] The purpose of the present invention is to solve the above-mentioned shortcomings in the prior art and to propose a backlight module for a liquid crystal display screen.

[0008] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0009] A backlight module for a liquid crystal display is designed, comprising a back end cover, wherein a plurality of lamp holders are disposed inside the back end cover, with both sides of the lamp holders being closely attached to the inner wall of the back end cover, the lamp holders being evenly spaced along the inner wall of the back end cover, and both ends of the lamp holders being fixed to the back end cover by bolts.

[0010] A plurality of LED lamp beads are distributed on the surface of the lamp frame, and a through hole is provided on the lamp frame, and the LED lamp beads are arranged through the lamp frame, and the plurality of LED lamp beads are evenly distributed along the horizontal direction;

[0011] A reflective sheet is provided on the inner wall of the back end cover, and one side of the reflective sheet is bonded and fixed to the inner wall of the back end cover by resin glue;

[0012] A light guide plate and a diffusion film are sequentially arranged inside the back end cover. The light guide plate is mounted on the reflective sheet, and the diffusion film covers the outward side of the light guide plate.

[0013] In detail, the lamp frame is a slat structure with two sides bent at right angles, and the lamp frame is made of aluminum alloy.

[0014] In detail, the outer wall of the LED lamp bead is provided with an annular sleeve, and the annular sleeve is bonded to the surface of the LED lamp bead by resin glue.

[0015] In detail, the annular sleeve is provided with grooves inside, the number of the grooves is two, and the grooves are evenly distributed along the outer ring wall of the annular sleeve.

[0016] In detail, a clamping head is provided inside the groove, the end face of the clamping head is an arc surface structure, and one end of the clamping head is slidably sleeved with the inside of the groove.

[0017] In detail, a spring is provided inside the groove, and two ends of the spring are fixedly assembled with the surface of the clamping head and the inner wall surface of the groove respectively.

[0018] In detail, an arc groove is provided inside the through hole of the lamp holder. There are two arc grooves, which correspond to the positions of the grooves one by one. The arc surface end of the clamp is slidably and tightly arranged against the inner arc surface of the arc groove.

[0019] The design scheme proposed by the utility model has the following beneficial effects during application:

[0020] 1. By setting up several lamp holders in the back end cover, the LED lamp beads can be installed on the lamp holder as the light source component. The reflector is located between the light source and the light guide plate, which is used to reflect the light not captured by the light guide plate back to the system to improve the light efficiency and brightness. The light guide plate is used to evenly distribute the light emitted by the light source to the entire back of the screen. The uniform distribution of light is achieved through specific design and surface treatment. The diffusion film is located between the light guide plate and the liquid crystal layer to further homogenize the light and ensure consistent brightness of all parts of the screen.

[0021] 2. In order to disassemble the LED lamp bead at the core of the light source assembly when a problem occurs, by pulling the end of the LED lamp bead or pushing the tail of the LED lamp bead, the arc surface end of the clamp can be squeezed with the inner arc surface of the arc groove, so that the spring can be compressed, thereby allowing the clamp to enter the groove, and then the clamp is separated from the arc groove, and finally, the LED lamp bead can be taken out from the through hole of the lamp holder. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a top view diagram of the lamp stand of the present invention;

[0024] Figure 3 This is an enlarged schematic diagram of point A of the present utility model;

[0025] Figure 4 This is a partially enlarged schematic diagram of the LED lamp beads and lamp holder of the present invention;

[0026] Figure 5 This is an enlarged schematic diagram of point B of the present invention.

[0027] In the figure: 1. Back end cover; 11. Lamp holder; 12. LED lamp beads; 13. Bolts; 14. Reflector; 15. Light guide plate; 16. Diffuser; 20. Ring sleeve; 21. Groove; 22. Clamp; 23. Spring; 24. Arc groove. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely 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, rather than all the embodiments.

[0029] Reference Figure 1-Figure 5 A backlight module for a liquid crystal display includes a back end cover 1, wherein a plurality of lamp holders 11 are disposed inside the back end cover 1, wherein both sides of the plurality of lamp holders 11 are closely attached to the inner wall of the back end cover 1, and the plurality of lamp holders 11 are evenly distributed along the interior of the back end cover 1, and both ends of the lamp holders 11 are fixed to the back end cover 1 by bolts 13;

[0030] A plurality of LED lamp beads 12 are distributed on the surface of the lamp frame 11. A through hole is provided on the lamp frame 11. The LED lamp beads 12 are arranged through the lamp frame 11. The plurality of LED lamp beads 12 are evenly distributed along the horizontal direction. LED light sources are becoming increasingly popular due to their high efficiency, long life and excellent color performance.

[0031] A reflective sheet 14 is provided on the inner wall of the back end cap 1. One side of the reflective sheet 14 is bonded to the inner wall of the back end cap 1 with resin glue. The reflective sheet 14 is located between the light source and the light guide plate 15 and is used to reflect light not captured by the light guide plate 15 back into the system to improve light efficiency and brightness.

[0032] A light guide plate 15 and a diffusion film 16 are also provided in sequence inside the back end cover 1. The light guide plate 15 is mounted on the reflective sheet 14, and the diffusion film 16 covers the outward side of the light guide plate 15. The light guide plate 15 is used to evenly distribute the light emitted by the light source to the entire back of the screen. It is usually a transparent plastic plate that achieves uniform distribution of light through specific design and surface treatment. The diffusion film 16 is located between the light guide plate 15 and the liquid crystal layer to further homogenize the light and ensure consistent brightness of all parts of the screen.

[0033] It should be further explained that the lamp holder 11 is a slat structure with two sides bent at right angles. The lamp holder 11 is made of aluminum alloy, and the bent portion is tightly attached to the inner wall of the back end cover 1 .

[0034] It should be further explained that an annular sleeve 20 is provided on the outer wall of the LED lamp bead 12 , and the annular sleeve 20 is bonded to the surface of the LED lamp bead 12 by resin glue. The annular sleeve 20 has a supporting effect, which can facilitate the fixation of the LED lamp bead 12 and the lamp frame 11 .

[0035] It should be further explained that the annular sleeve 20 is provided with grooves 21 inside. There are two grooves 21 , which are evenly spaced along the outer wall of the annular sleeve 20 .

[0036] It should be further explained that a clamping head 22 is provided inside the groove 21, and the end face of the clamping head 22 is an arc structure. One end of the clamping head 22 is slidably sleeved inside the groove 21. The clamping head 22 can produce an extrusion effect through the spring 23, so that it can contact the inner arc surface of the arc groove 24 to form a supporting effect, and then through the distributed supporting effect on both sides, the quick and stable assembly of the LED lamp bead 12 and the lamp holder 11 can be ensured.

[0037] It should be further explained that a spring 23 is provided inside the groove 21, and the two ends of the spring 23 are fixedly assembled with the surface of the clamping head 22 and the inner wall surface of the groove 21 respectively. The spring 23 is in a balanced state, which can ensure the stable telescopic reset of the clamping head 22.

[0038] It should be further explained that an arc groove 24 is provided on the inner side of the through hole of the lamp holder 11. The clamping head 22 enters the groove 21, so that the clamping head 22 is separated from the arc groove 24, and the LED lamp bead 12 can be taken out from the through hole of the lamp holder 11. There are two arc grooves 24, and they correspond one to one to the position of the groove 21. The arc surface end of the clamping head 22 is slidably and tightly against the inner arc surface of the arc groove 24.

[0039] Working method: By setting up several lamp holders 11 in the back end cover 1, the LED lamp beads 12 can be installed on the lamp holder 11 as a light source component. The reflector 14 is located between the light source and the light guide plate 15, and is used to reflect the light not captured by the light guide plate 15 back to the system to improve the light efficiency and brightness. The light guide plate 15 is used to evenly distribute the light emitted by the light source to the entire back of the screen. The uniform distribution of light is achieved through specific design and surface treatment. The diffusion film 16 is located between the light guide plate 15 and the liquid crystal layer, and is used to further homogenize the light to ensure consistent brightness of all parts of the screen.

[0040] In order to disassemble the LED lamp bead 12 at the core of the light source assembly when a problem occurs, the end of the LED lamp bead 12 is pulled or the tail of the LED lamp bead 12 is pushed so that the arc surface end of the clamp 22 can be squeezed with the inner arc surface of the arc groove 24, so that the spring 23 can be compressed, thereby allowing the clamp 22 to enter the groove 21, and then the clamp 22 is separated from the arc groove 24, and finally, the LED lamp bead 12 can be taken out from the through hole of the lamp holder 11.

[0041] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A backlight module for a liquid crystal display, comprising a back end cover (1), characterized in that: A plurality of lamp holders (11) are arranged inside the back end cover (1), and both sides of the plurality of lamp holders (11) are arranged in close contact with the inner wall of the back end cover (1). The plurality of lamp holders (11) are evenly distributed along the inside of the back end cover (1), and both ends of the lamp holders (11) are fixedly assembled with the back end cover (1) by bolts (13). A plurality of LED lamp beads (12) are distributed on the surface of the lamp frame (11); a through hole is provided on the lamp frame (11); the LED lamp beads (12) are arranged through the lamp frame (11); and the plurality of LED lamp beads (12) are distributed equidistantly in the horizontal direction; A reflective sheet (14) is provided on the inner wall of the back end cover (1), and one side of the reflective sheet (14) is bonded and fixed to the inner wall of the back end cover (1) by resin glue; A light guide plate (15) and a diffusion film (16) are sequentially arranged inside the back end cover (1); the light guide plate (15) is mounted on the reflective sheet (14); and the diffusion film (16) covers the outward side of the light guide plate (15).

2. The backlight module for a liquid crystal display according to claim 1, wherein: The lamp frame (11) is a slat structure, both sides of which are bent at right angles, and the lamp frame (11) is made of aluminum alloy material.

3. The backlight module for a liquid crystal display according to claim 1, wherein: An annular sleeve (20) is provided on the outer wall of the LED lamp bead (12), and the annular sleeve (20) is bonded to the surface of the LED lamp bead (12) by resin glue.

4. The backlight module for a liquid crystal display according to claim 3, wherein: The annular sleeve (20) is provided with grooves (21) inside, and the number of the grooves (21) is two and they are evenly distributed along the outer ring wall of the annular sleeve (20).

5. The backlight module for a liquid crystal display according to claim 4, characterized in that: A clamping head (22) is provided inside the groove (21), and the end surface of the clamping head (22) is an arc surface structure. One end of the clamping head (22) is slidably sleeved with the inside of the groove (21).

6. The backlight module for a liquid crystal display according to claim 5, characterized in that: A spring (23) is provided inside the groove (21), and two ends of the spring (23) are fixedly assembled with the surface of the clamping head (22) and the inner wall surface of the groove (21), respectively.

7. The backlight module for a liquid crystal display according to claim 6, characterized in that: An arcuate groove (24) is provided inside the through hole of the lamp holder (11), and there are two arcuate grooves (24) that correspond one to one to the positions of the groove (21). The arcuate end of the clamping head (22) is slidably and tightly arranged against the inner arcuate surface of the arcuate groove (24).

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