Backlight module and liquid crystal display

Abstract

The utility model relates to liquid crystal display screen technical field, and disclose a backlight unit and liquid crystal display screen, the device whole includes liquid crystal display screen, its surface is equipped with backlight unit mechanism and display screen backplate quick -release mechanism, and the left and right ends are equipped with the heat dissipation opening of dustproof screen, and the backlight unit mechanism is through the plug -in cooperation of first fixed seat and plug -in seat, and the connecting bottom plate of quick -frozen LED lamp pearl area is fixed, ensures that the reflection film and connecting bottom plate accurate alignment, and the light guide plate, diffusion film, bright film are locked by pressure frame after receiving, avoid component displacement, and display screen backplate quick -release mechanism is through the cooperation of plug -in block and plug -in mouth, and telescopic clamping post limit, realize backplate quick -disassembly, the device modularization design, installation dismounts need not additional tool, guarantee light conduction stable, improve display effect, reduce overhaul maintenance cost, adapt to all kinds of liquid crystal display equipment demand.

Description

Technical Field

[0001] This utility model relates to the field of liquid crystal display technology, specifically to a backlight module and a liquid crystal display. Background Technology

[0002] LCD screens are widely used in electronic devices due to their advantages such as thinness, lightness, and low power consumption. They do not emit light themselves and rely on backlight modules to provide a uniform light source. Existing backlight modules suffer from low light utilization and insufficient light uniformity, easily leading to dark edges on the screen and uneven brightness. Furthermore, some modules have poor heat dissipation performance, which may affect display stability and lifespan with long-term use. In addition, how to improve color gamut and brightness while maintaining energy efficiency under high image quality requirements has become a key issue that urgently needs to be addressed in backlight module design.

[0003] According to a patent application published on the internet (authorization announcement number: CN220455640U), "This utility model discloses a backlight module and an LCD screen, belonging to the field of LCD screen technology. It includes a mounting base, a reflective film mounted on one side of the mounting base, an LED light source disposed on one side of the reflective film, a slot adapted to the reflective film on one side of the mounting base, the reflective film being fixedly connected to the inner cavity of the slot, and a mounting groove adapted to the LED light source on the surface of the mounting base. One side of the LED light source penetrates the reflective film and is inserted into the inner cavity of the mounting groove. This utility model uses a positioning component to install and fix the LED light source by a snap-fit ​​method. When disassembly and maintenance are required, simply pull the pull plate to disengage the positioning plate from the wedge-shaped groove to remove the LED light source. This makes maintenance convenient and greatly improves the efficiency of maintenance personnel in inspecting and maintaining LCD screens." Based on the above, the applicant believes the following deficiencies exist: The existing device has a cumbersome fixing method and insufficient positioning accuracy. The fixing steps of the LED lamp beads with the connecting base plate are complicated, making it difficult to quickly install the reflective film and accurately align it with the end face of the connecting base plate. This affects the light reflection efficiency, and the optical components are prone to displacement during use, resulting in unstable effects. Displacement can easily occur, disrupting the continuity of light transmission, diffusion, and brightening, and causing large fluctuations in the effect. Utility Model Content

[0004] The purpose of this invention is to provide a backlight module and a liquid crystal display screen to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a backlight module and a liquid crystal display screen, including a liquid crystal display screen, a backlight module mechanism is provided on the surface of the liquid crystal display screen, a quick-release mechanism for the back panel of the display screen is provided on the surface of the liquid crystal display screen, heat dissipation vents are provided at the left and right ends of the liquid crystal display screen, and a dustproof mesh is installed at the outer end of the heat dissipation vents. The backlight module mechanism includes a first fixing base, which is fixedly connected to the left and right sides inside the liquid crystal display screen. A connector is mounted on the back of the first fixing base, and an inner connector post is fixedly connected inside the connector. A first connector hole is formed on the back of the first fixing base. A connecting base plate is fixedly connected to the front end of the inner end of the connector. An LED bead strip is mounted on the back of the connecting base plate. A reflective film is mounted on the front of the inside of the liquid crystal display screen. Second fixing bases are fixedly connected to the four corners inside the liquid crystal display screen. A fixing frame is mounted on the back of the second fixing base. Second connector holes are formed on the top and bottom of the left and right sides of the inner end of the fixing frame. A light guide plate is mounted on the inner end of the fixing frame. A... The device includes a diffusion film, a brightness enhancement film on its back, and a pressure frame on its back. The pressure frame has four fixed corners with insertion limiting posts. The first insertion hole of the first fixing seat engages with the inner insertion post of the insertion seat to quickly fix the connecting base plate of the LED bead strip. The reflective film is precisely aligned with the end face of the connecting base plate to ensure efficient light reflection. The light guide plate, diffusion film, and brightness enhancement film are housed within the fixing frame and locked by the insertion limiting posts and second insertion holes of the pressure frame to prevent component displacement and ensure stable light transmission, diffusion, and brightness enhancement effects. The overall modular design facilitates maintenance. Each optical component is connected to the fixing structure via a plug-in method, eliminating the need for additional tools to damage the structure during disassembly, thus reducing maintenance and replacement costs.

[0006] Preferably, the connector is mounted on the surface of the first fixed base via an inner connector post and a first connector hole, and the reflective film is aligned with the end face of the connecting base plate.

[0007] Preferably, the fixed frame is inserted into the surface of the fixed frame, and the light guide plate, diffusion film and brightness enhancement film are all disposed at the inner end of the fixed frame.

[0008] Preferably, the pressure frame is connected to the fixed frame via a plug-in limiting post and a second plug-in hole, and the light guide plate, diffusion film and brightness enhancement film are limited to the inner end of the fixed frame by the pressure frame.

[0009] Preferably, the backlight module for the liquid crystal display screen is characterized in that: a quick-release mechanism for the display screen back panel is provided on the surface of the liquid crystal display screen, the quick-release mechanism for the display screen back panel includes a back panel, the back panel is disposed on the back of the liquid crystal display screen, second connecting seats are fixedly connected to the left and right sides of the top and bottom of the back panel, first connecting seats are fixedly connected to the left and right sides of the black backing cloth at the top of the liquid crystal display screen, a plug-in block is fixedly connected to the front of the second connecting seat, a plug-in interface is opened on the back of the first connecting seat, a limit hole is opened on the outer end surface of the first connecting seat, and the outer end surface of the plug-in block... The backplate is fixedly connected with telescopic snap-fit ​​posts. The backplate is inserted into the insertion interface of the first connector via the plug-in block of the second connector. The telescopic snap-fit ​​posts automatically snap into the limiting slots to complete the fixation. When disassembling, simply press the telescopic snap-fit ​​posts to separate them without complicated procedures. The first and second connectors are symmetrically distributed at the four corners. The plug-in blocks fit snugly with the insertion interfaces. The telescopic snap-fit ​​posts provide reliable limiting to prevent the backplate from loosening during use. The overall adaptability is flexible. The quick-release mechanism is independent of the main structure of the LCD screen and does not affect the operation of the internal backlight module mechanism. At the same time, it is convenient to disassemble the backplate separately for internal component inspection or heat dissipation maintenance.

[0010] Preferably, the plug block is inserted into the plug interface, the telescopic snap-fit ​​post is inserted into the limiting port, and the back plate and the LCD screen are limited and installed through the quick-release mechanism of the display screen back plate.

[0011] Compared with the prior art, the present invention provides a backlight module and a liquid crystal display screen, which have the following beneficial effects: 1. The backlight module for the LCD display screen and the LCD display screen are equipped with a backlight module mechanism. The connecting base plate of the LED lamp bead strip is quickly fixed by the first insertion hole of the first fixing base and the inner insertion post of the insertion base. The reflective film is precisely aligned with the end face of the connecting base plate to ensure light reflection efficiency. The light guide plate, diffusion film and brightness enhancement film are stored in the fixing frame and locked by the insertion limiting post of the pressure frame and the second insertion hole to prevent component displacement and ensure stable light transmission, diffusion and brightness enhancement effects. The overall modular design is easy to maintain. Each optical component and the fixing structure are connected by insertion. No additional tools are needed to damage the structure during disassembly, reducing maintenance and replacement costs.

[0012] 2. The backlight module and LCD display screen are equipped with a quick-release mechanism for the display screen back panel. The back panel is inserted into the insertion interface of the first connector through the plug of the second connector. The telescopic locking post automatically engages with the limiting port to complete the fixation. When disassembling, pressing the telescopic locking post can separate the back panel without complicated procedures. The first and second connectors are symmetrically distributed at the four corners. The plug and the insertion interface fit together. The telescopic locking post provides reliable limiting to prevent the back panel from loosening during use. The overall adaptability is flexible. The quick-release mechanism is independent of the main structure of the LCD display screen and does not affect the operation of the internal backlight module mechanism. At the same time, it is convenient to disassemble the back panel separately for internal component inspection or heat dissipation maintenance. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the back of the structure of this utility model; Figure 3 This is a schematic diagram of the backlight module structure of this utility model; Figure 4 This is a schematic diagram of the LED bead strip structure of this utility model; Figure 5 This is a schematic diagram of the structural fixing frame of this utility model; Figure 6 This is a schematic diagram of the quick-release mechanism for the back panel of the display screen of this utility model.

[0014] In the diagram: 1. LCD screen; 2. Backlight module mechanism; 21. First fixing base; 22. Plug-in base; 23. Inner plug-in post; 24. First plug-in hole; 25. Connecting base plate; 26. LED lamp bead strip; 27. Reflective film; 28. Second fixing base; 29. ​​Fixing frame; 201. Second plug-in hole; 202. Light guide plate; 203. Diffuser film; 204. Brightness enhancement film; 205. Pressure frame; 206. Plug-in limiting post; 3. Quick-release mechanism for display screen back panel; 31. Back panel; 32. First connecting base; 33. Second connecting base; 34. Plug-in interface; 35. Plug-in block; 36. Limiting port; 37. Telescopic locking post; 4. Heat dissipation vent; 5. Dustproof mesh. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0017] This utility model provides the following technical solution: Example 1 Please see Figure 1-6 A backlight module and an LCD display screen include an LCD display screen 1, a backlight module mechanism 2 is provided on the surface of the LCD display screen 1, a quick-release mechanism 3 for the back panel of the LCD display screen 1 is provided on the surface of the LCD display screen 1, and heat dissipation vents 4 are provided at the left and right ends of the LCD display screen 1, with dustproof mesh 5 installed at the outer end of the heat dissipation vents 4. The backlight module mechanism 2 includes a first fixing base 21, which is fixedly connected to the left and right sides inside the LCD screen 1. A connector 22 is mounted on the back of the first fixing base 21, and an inner connector 23 is fixedly connected inside the connector 22. A first connector hole 24 is opened on the back of the first fixing base 21. A connecting base plate 25 is fixedly connected to the front end of the inner end of the connector 22. An LED bead strip 26 is mounted on the back of the connecting base plate 25. A reflective film 27 is mounted on the front of the inside of the LCD screen 1. Second fixing bases 28 are fixedly connected to the four corners inside the LCD screen 1. A fixing frame 29 is mounted on the back of the second fixing base 28. Second connector holes 201 are opened on the top and bottom of the left and right sides of the inner end of the fixing frame 29. A light guide plate 202 is mounted on the inner end of the fixing frame 29. A diffusion film 203 is provided on the back of the light guide plate 202. 3. A brightness enhancement film 204 is provided on the back, and a pressure frame 205 is provided on the back of the brightness enhancement film 204. The four corners of the front of the pressure frame 205 are fixedly connected to the insertion limiting post 206. The first insertion hole 24 of the first fixing seat 21 cooperates with the inner insertion post 23 of the insertion seat 22 to quickly fix the connecting base plate 25 of the LED lamp bead strip 26. The reflective film 27 is precisely aligned with the end face of the connecting base plate 25 to ensure light reflection efficiency. The light guide plate 202, diffusion film 203, and brightness enhancement film 204 are stored in the fixing frame 29 and locked by the insertion limiting post 206 of the pressure frame 205 and the second insertion hole 201 to prevent component displacement and ensure stable light transmission, diffusion and brightness enhancement effects. The overall modular design is easy to maintain. Each optical component and the fixing structure are connected by a plug-in method. No additional tools are needed to damage the structure when disassembling, reducing maintenance and replacement costs. The connector 22 is mounted on the surface of the first fixed base 21 through the inner connector 23 and the first connector hole 24, and the reflective film 27 is aligned with the end face of the connecting base plate 25. The fixed frame 29 is inserted into the surface of the fixed frame 29, and the light guide plate 202, the diffusion film 203 and the brightness enhancement film 204 are all disposed at the inner end of the fixed frame 29. The pressure frame 205 is connected to the fixed frame 29 through the insertion limiting post 206 and the second insertion hole 201. The light guide plate 202, the diffusion film 203 and the brightness enhancement film 204 are limited to the inner end of the fixed frame 29 by the pressure frame 205.

[0018] Example 2 Please see Figure 1-6Furthermore, based on Embodiment 1, a backlight module for a liquid crystal display screen is obtained, characterized in that: a quick-release mechanism 3 for a display screen back panel is provided on the surface of the liquid crystal display screen 1, the quick-release mechanism 3 includes a back panel 31, the back panel 31 is disposed on the back of the liquid crystal display screen 1, and second connecting seats 33 are fixedly connected to the left and right sides of the top and bottom of the back panel 31; first connecting seats 32 are fixedly connected to the left and right sides of the black base cloth at the top of the liquid crystal display screen 1; a plug-in block 35 is fixedly connected to the front of the second connecting seat 33; a plug-in interface 34 is opened on the back of the first connecting seat 32; a limit hole 36 is opened on the outer surface of the first connecting seat 32; and a plug-in block 35 is fixedly connected to the outer surface of the plug-in block 35. The telescopic locking post 37 allows the backplate 31 to be inserted into the insertion interface 34 of the first connecting seat 32 via the insertion block 35 of the second connecting seat 33. The telescopic locking post 37 automatically engages with the limiting port 36 to complete the fixation. When disassembling, pressing the telescopic locking post will separate the backplate 31 without complicated procedures. The first connecting seat 32 and the second connecting seat 33 are symmetrically distributed at the four corners. The insertion block 35 fits snugly with the insertion interface 34. The telescopic locking post 37 provides reliable limiting to prevent the backplate 31 from loosening during use. The overall adaptability is flexible. The quick-release mechanism is independent of the main structure of the LCD screen 1 and does not affect the operation of the internal backlight module mechanism 2. At the same time, it is convenient to disassemble the backplate 31 separately for internal component inspection or heat dissipation maintenance. The plug block 35 is inserted into the plug interface 34, the telescopic snap-fit ​​post 37 is inserted into the limiting port 36, and the back plate 31 and the LCD screen 1 are limited and installed through the display screen back plate quick release mechanism 3.

[0019] In actual operation, when this device is used, the first insertion hole 24 of the first fixing seat 21 cooperates with the inner insertion post 23 of the insertion seat 22 to quickly fix the connecting base plate 25 of the LED lamp bead strip 26. The reflective film 27 is precisely aligned with the end face of the connecting base plate 25 to ensure light reflection efficiency. The light guide plate 202, diffusion film 203, and brightness enhancement film 204 are stored in the fixing frame 29 and locked by the insertion limiting post 206 of the pressure frame 205 and the second insertion hole 201 to prevent component displacement and ensure stable light transmission, diffusion and brightness enhancement effects. The overall modular design facilitates maintenance. Each optical component is connected to the fixing structure by insertion. No additional tools are needed to damage the structure during disassembly, reducing maintenance and replacement costs. The backplate 31 is inserted into the interface 34 of the first connector 32 via the plug block 35 of the second connector 33. The telescopic locking post 37 automatically engages with the limiting port 36 to complete the fixation. When disassembling, pressing the telescopic locking post will separate the backplate 31 without complicated procedures. The first connector 32 and the second connector 33 are symmetrically distributed at the four corners. The plug block 35 fits snugly with the interface 34. The telescopic locking post 37 provides reliable limiting to prevent the backplate 31 from loosening during use. The overall adaptability is flexible. The quick-release mechanism is independent of the main structure of the LCD screen 1 and does not affect the operation of the internal backlight module mechanism 2. At the same time, it is convenient to disassemble the backplate 31 separately for internal component inspection or heat dissipation maintenance.

[0020] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A backlight module, comprising a liquid crystal display (1), characterized in that: The surface of the liquid crystal display screen (1) is provided with a backlight module mechanism (2), the surface of the liquid crystal display screen (1) is provided with a quick-release mechanism (3) for the back panel of the display screen, and heat dissipation vents (4) are opened at both ends of the liquid crystal display screen (1). A dustproof mesh (5) is installed on the outer end of the heat dissipation vents (4). The backlight module mechanism (2) includes a first fixing base (21), which is fixedly connected to the left and right sides inside the liquid crystal display screen (1). A plug-in base (22) is installed on the back of the first fixing base (21). An inner plug-in post (23) is fixedly connected inside the plug-in base (22). A first plug-in hole (24) is opened on the back of the first fixing base (21). A connecting base plate (25) is fixedly connected to the front end of the inner end of the plug-in base (22). An LED lamp bead strip (26) is installed on the back of the connecting base plate (25). A reflective film (27) is installed on the front of the inside of the liquid crystal display screen (1). The crystal display screen (1) has a second fixing seat (28) fixedly connected to the four corners inside. A fixing frame (29) is installed on the back of the second fixing seat (28). The top and bottom of the left and right sides of the inner end of the fixing frame (29) are provided with second insertion holes (201). A light guide plate (202) is installed on the inner end of the fixing frame (29). A diffusion film (203) is provided on the back of the light guide plate (202). A brightness enhancement film (204) is provided on the back of the diffusion film (203). A pressure frame (205) is provided on the back of the brightness enhancement film (204). Insertion limiting posts (206) are fixedly connected to the four corners of the front of the pressure frame (205).

2. A backlight module according to claim 1, characterized in that: The plug-in base (22) is installed on the surface of the first fixed base (21) through the inner plug-in post (23) and the first plug-in hole (24), and the reflective film (27) is aligned with the end face of the connecting base plate (25).

3. A backlight module according to claim 1, characterized in that: The fixed frame (29) is inserted into the surface of the fixed frame (29), and the light guide plate (202), the diffusion film (203) and the brightness enhancement film (204) are all disposed at the inner end of the fixed frame (29).

4. A backlight module according to claim 1, characterized in that: The pressure frame (205) is connected to the fixed frame (29) through the insertion limiting post (206) and the second insertion hole (201). The light guide plate (202), the diffusion film (203) and the brightness enhancement film (204) are limited to the inner end of the fixed frame (29) by the pressure frame (205).

5. A liquid crystal display screen, comprising any one of the backlight modules according to claims 1-4, characterized in that: The surface of the liquid crystal display screen (1) is provided with a quick-release mechanism (3) for the back panel of the display screen. The quick-release mechanism (3) for the back panel of the display screen includes a back panel (31). The back panel (31) is located on the back of the liquid crystal display screen (1). The top and bottom left and right sides of the back panel (31) are fixedly connected with second connecting seats (33). The top black cloth of the liquid crystal display screen (1) is fixedly connected with first connecting seats (32) on both sides. The front of the second connecting seat (33) is fixedly connected with a plug block (35). The back of the first connecting seat (32) is provided with a plug interface (34). The outer surface of the first connecting seat (32) is provided with a limit hole (36). The outer surface of the plug block (35) is fixedly connected with a telescopic snap-fit ​​post (37).

6. A liquid crystal display screen according to claim 5, characterized in that: The plug block (35) is inserted into the plug interface (34), the telescopic snap-fit ​​post (37) is inserted into the limiting port (36), and the back plate (31) and the liquid crystal display screen (1) are limited and installed through the display screen back plate quick release mechanism (3).

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