Diffusion module and LCD display containing the diffusion module

Abstract

This invention relates to the field of display technology and discloses a diffusion module and an LCD display screen including the diffusion module. The diffusion module includes a base plate, with multiple light-transmitting airbags arranged in a rectangular row on the top of the base plate. A photosensitive element is disposed on the outer side of each airbag. Each airbag includes a mounting base fixedly connected to the top of the base plate. An airbag shell is fixedly connected to the top of the mounting base, and a central axis is fixedly connected to the center of the mounting base. Four partition plates are disposed on the outer side of the central axis. The photosensitive element includes a mounting frame, with a photosensitive unit disposed on the inner side of the mounting frame. Four fan-shaped air-storage airbags are disposed between the photosensitive unit and the airbag shell. This invention achieves a diffusion film distribution characteristic of high scattering in strong light areas and low light transmittance in weak light areas, effectively balancing the impact of external lighting differences on the display effect, improving the brightness uniformity of the screen under complex lighting environments, and ensuring overall consistency of the displayed image.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to diffusion modules and LCD displays including the diffusion modules. Background Technology

[0002] The diffusion module is a core light adjustment component of an LCD display. Its core function is to scatter and optimize the distribution of ambient light and the primary light source emitted by the backlight module entering the display. By adjusting the propagation path and scattering intensity of light, it avoids the formation of localized bright spots or dark areas on the screen surface, thereby ensuring the uniformity of brightness in the displayed image and improving the user's viewing experience. This type of diffusion module is widely used in various LCD display devices such as outdoor advertising screens, automotive display terminals, laptop monitors, and smart TVs. Especially in usage scenarios with large fluctuations in ambient light intensity and uneven spatial distribution (such as strong outdoor light environments and dynamic lighting environments in vehicles), the light adjustment performance of the diffusion module directly determines the stability of the display effect.

[0003] Currently, most diffusion modules used in existing LCD displays are statically designed. Their typical structure includes a fixed base plate and a single or multiple layers of fixed diffusion film. Some solutions add a static prism layer or a brightness enhancement film to help improve light utilization efficiency. The core structural components of these existing diffusion modules (such as the diffusion film and prism layer) are fixed in form. Their key parameters, such as scattering particle density and light refraction angle, remain constant after manufacturing, making it difficult to dynamically adjust according to changes in external lighting conditions. This results in overexposure and whitening in areas under strong direct light due to insufficient scattering, while areas under weak light suffer from excessive scattering, leading to a loss of display brightness and poor overall screen brightness uniformity.

[0004] Therefore, to address the aforementioned problems, a diffusion module and an LCD display screen containing the diffusion module are proposed. Summary of the Invention

[0005] To overcome the above deficiencies, the present invention provides a diffusion module and an LCD display screen including the diffusion module, aiming to improve the problem in the prior art where some diffusion modules are difficult to dynamically adjust according to changes in external lighting conditions, resulting in poor overall brightness uniformity of the screen.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A diffusion module includes a diffusion module, the diffusion module includes a base plate, and multiple light-transmitting airbags are arranged in a rectangular row on the top of the base plate. A light sensor is provided on the outside of the light-transmitting airbags.

[0008] The light-transmitting airbag includes a mounting base fixedly connected to the top of the base plate. The top of the mounting base is fixedly connected to the airbag shell, and a central shaft is fixedly connected to the center of the mounting base. Four partition plates are provided on the outside of the central shaft.

[0009] The photosensitive component includes a mounting frame, a photosensitive unit is arranged inside the mounting frame, four fan-shaped air storage bags are arranged between the photosensitive unit and the airbag shell, a flow tube is arranged at the connection between the fan-shaped air storage bags and the airbag shell, multiple sliding shafts are fixedly connected inside the flow tube, and a lightweight baffle is slidably connected to the outside of the sliding shaft. A compression ring is also slidably connected to the outside of the sliding shaft, and a spring is arranged between the outside of the compression ring and the end of the sliding shaft.

[0010] As a further description of the above technical solution:

[0011] The outer side of the partition plate is sealed to the airbag shell and the mounting chassis, and the airbag shell forms four sealed chambers corresponding to the fan-shaped air storage bladder through the four partition plates.

[0012] As a further description of the above technical solution:

[0013] The photosensitive unit is a liquid crystal elastomer, and a photothermal agent is introduced inside it. The deformation direction of the photosensitive unit is restricted by the first limiting plate, the second limiting plate, and the anti-detachment strip.

[0014] As a further description of the above technical solution:

[0015] Both the outer shell of the airbag and the fan-shaped air storage bag are deformable, and the flow tube is sealed to the fan-shaped air storage bag and the outer shell of the airbag.

[0016] As a further description of the above technical solution:

[0017] The top of the base plate is provided with a first limiting plate and a second limiting plate. An anti-detachment strip is fixedly connected between the first limiting plate and the second limiting plate. The photosensitive element is disposed between the first limiting plate, the second limiting plate and the anti-detachment strip. A diffusion layer is fixedly connected to the top of the second limiting plate.

[0018] As a further description of the above technical solution:

[0019] The diffusion layer includes a fixed frame fixedly connected to the top of the second limiting plate. A protective film and a diffusion film are provided on the inner side of the fixed frame. Four fixed shafts are fixedly connected to the four sides of the fixed frame. Hinges are rotatably connected to the outer side of the fixed shafts, and the two ends of the hinges are respectively hinged to the outer side of the diffusion film and the protective film.

[0020] As a further description of the above technical solution:

[0021] The outer diameters of both the protective film and the diffusion film are larger than the inner diameter of the internal rectangular groove of the fixed frame, and the protective film is positioned below the diffusion film.

[0022] An LCD display screen including the diffusion module is suitable for any of the diffusion modules described above. It includes a display housing, an adjustment bracket is provided on the rear side of the display housing, and a protective layer, a brightness enhancement film, a display panel core layer, a backlight module and a controller are arranged sequentially from front to back inside the display housing, with the diffusion module disposed between the protective layer and the brightness enhancement film.

[0023] The present invention has the following beneficial effects:

[0024] 1. In this invention, the photosensitive unit of the photosensitive element undergoes directional deformation under light illumination, squeezing the fan-shaped gas storage bladder and causing gas to flow through the circulation cylinder to the light-transmitting gas bladder. This causes the outer shell of the light-transmitting gas bladder to expand differentially, thereby pushing the protective film and diffusion film of the diffusion layer to rotate through a hinge to achieve gradient deformation. This structural linkage results in the diffusion film exhibiting a distribution characteristic of high scattering in strong light areas and low light transmittance in weak light areas, effectively balancing the impact of external light differences on the display effect, improving the brightness uniformity of the screen in complex lighting environments, and ensuring the overall consistency of the displayed image.

[0025] 2. In this invention, a deformable fan-shaped gas storage bladder and a light-transmitting bladder are used as power transmission carriers. Combined with a bidirectional flow control structure consisting of a lightweight baffle plate and springs inside the flow cylinder, directional and quantitative gas transmission is achieved. Simultaneously, through the rotational cooperation of the fixed shaft and hinge, the diffusion membrane expands precisely in tandem with the light-transmitting bladder. This design ensures a linear response between light intensity and diffusion adjustment, improves the stability and reliability of the structure's operation, and enhances the device's adaptability to dynamic lighting environments. Attached Figure Description

[0026] Figure 1 This is a perspective view of the diffusion module and the LCD display screen including the diffusion module proposed in this invention;

[0027] Figure 2 This is a schematic diagram of the structure of the diffusion module proposed in this invention and the display housing of the LCD display screen including the diffusion module;

[0028] Figure 3 This is a schematic diagram of the diffusion module proposed in this invention and the diffusion module of the LCD display screen including the diffusion module;

[0029] Figure 4 This is an exploded view of the diffusion module proposed in this invention and the diffusion module of the LCD display screen including the diffusion module;

[0030] Figure 5This is a schematic diagram of the diffusion module and the light-transmitting airbag of the LCD display screen containing the diffusion module proposed in this invention;

[0031] Figure 6 This is a schematic diagram of the diffusion module and the diffusion layer of the LCD display screen containing the diffusion module proposed in this invention;

[0032] Figure 7 for Figure 5 Enlarged view of point A in the middle;

[0033] Figure 8 for Figure 6 Enlarged view of point B in the middle.

[0034] Legend:

[0035] 1. Monitor housing; 2. Adjustment bracket; 3. Protective layer; 4. Diffuser module; 41. Base plate; 42. Limiting plate one; 43. Anti-detachment strip; 44. Limiting plate two; 45. Light-transmitting airbag; 451. Mounting chassis; 452. Airbag housing; 453. Central shaft; 454. Divider plate; 46. Photosensitive element; 461. Mounting frame; 462. Photosensitive unit; 463. Fan-shaped airbag; 464. Flow tube; 465. Lightweight baffle; 466. Sliding shaft; 467. Compression ring; 468. Spring; 47. Diffuser layer; 471. Fixing frame; 472. Protective film; 473. Diffuser film; 474. Fixing shaft; 475. Hinge; 5. Brightness enhancement film; 6. Display panel core layer; 7. Backlight module; 8. Controller. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Reference Figures 3 to 8This invention provides an embodiment of a diffusion module, including a diffusion module 4. The diffusion module 4 serves as the core supporting structure of the entire diffusion module, integrating key components such as a base plate 41, a light-transmitting airbag 45, and a light sensor 46. It provides basic support for the coordinated operation of each part, ensuring the orderly operation of light sensing adjustment and diffusion functions. The diffusion module 4 includes a base plate 41, which provides an installation foundation for structures such as the light-transmitting airbag 45, limiting plate one 42, and limiting plate two 44, ensuring the relative spatial stability of each component. It is the bottom supporting carrier of the diffusion module. The top of 41 has multiple light-transmitting airbags 45 arranged in a rectangular row. The light-transmitting airbags 45 can expand and deform under the action of gas. Through the differentiated expansion of different areas, the shape adjustment of the upper diffusion layer 47 is provided, thereby realizing the dynamic adjustment of the light diffusion effect. A light sensor 46 is provided on the outside of the light-transmitting airbag 45. The light sensor 46 is used to sense changes in the intensity of external light. The photosensitive unit 462 inside it can convert light energy into heat energy and generate deformation, providing a power source for the gas compression of the fan-shaped air storage bag 463. It is the starting point for realizing light control adjustment. The top of the base plate 41 is provided with a first limiting plate 42 and a second limiting plate 44. The first limiting plate 42 and the second limiting plate 44 restrict the deformation direction of the photosensitive unit 462, allowing it to expand only in the middle direction, thus ensuring the orientation of the deformation of the photosensitive unit 462 and accurately squeezing the fan-shaped air storage bag 463. An anti-detachment strip 43 is fixedly connected between the first limiting plate 42 and the second limiting plate 44, further strengthening the limiting effect on the photosensitive element 46 and preventing light from being detached. The sensor 46 may shift position during operation to ensure the stability of light sensing adjustment. The light sensor 46 is positioned between the first limiting plate 42, the second limiting plate 44, and the anti-detachment strip 43. A diffusion layer 47 is fixedly connected to the top of the second limiting plate 44. The diffusion layer 47 receives the power from the expansion of the light-transmitting airbag 45. Through the shape changes of the protective film 472 and the diffusion film 473, the gradient adjustment of the light scattering degree is achieved, so that the strong light area has high scattering and the weak light area has low light transmission, thereby optimizing the brightness uniformity of the screen display.

[0038] The light-transmitting airbag 45 includes a mounting base 451 fixedly connected to the top of the base plate 41. The mounting base 451 provides a fixed foundation for the airbag shell 452 and the central shaft 453, ensuring the relative positional stability of the various components of the light-transmitting airbag 45, which is an important guarantee for the structural stability of the light-transmitting airbag 45. The airbag shell 452 is fixedly connected to the top of the mounting base 451. The airbag shell 452 can deform and forms multiple sealed chambers through the partition plate 454. It can expand to different degrees according to the amount of gas entering, providing direct power transmission for the adjustment of the diffusion layer 47. The central shaft 453 is fixedly connected to the center of the mounting base 451. The central shaft 453 provides support for the partition plate 454. The installation center is provided with auxiliary partition plates 454, which divide the interior of the airbag shell 452 into multiple sealed chambers to ensure that the airbag shell 452 can expand differentially in different areas after the gas enters. Four partition plates 454 are provided on the outside of the central shaft 453. The partition plates 454 divide the interior of the airbag shell 452 into sealed chambers corresponding to the fan-shaped air storage bladder 463, so that the gas entering can act precisely on specific areas of the airbag shell 452 to achieve differential expansion adjustment. The outer side of the partition plate 454 is sealed to the airbag shell 452 and the mounting chassis 451, and the airbag shell 452 forms four sealed chambers corresponding to the fan-shaped air storage bladder 463 through the four partition plates 454.

[0039] The photosensitive component 46 includes a mounting frame 461, which provides a mounting frame for the internal components of the photosensitive component 46, such as the photosensitive unit 462 and the fan-shaped air reservoir 463, ensuring the integration and stability of the various parts of the photosensitive component 46. The photosensitive unit 462 is arranged inside the mounting frame 461. The photosensitive unit 462 is a liquid crystal elastomer and a photothermal agent is introduced inside. The deformation direction of the photosensitive unit 462 is restricted by the first limiting plate 42, the second limiting plate 44 and the anti-detachment strip 43. The photosensitive unit 462 uses a liquid crystal elastomer with introduced photothermal agent, which can generate corresponding deformation with changes in light intensity. It is the core functional component for light sensing adjustment and provides initial power for subsequent gas extrusion and diffusion adjustment. Four fan-shaped gas storage bladders 463 are disposed between the photosensitive unit 462 and the gas bladder shell 452. The fan-shaped gas storage bladders 463 can deform, and under the compression of the photosensitive unit 462, the internal gas is transported to the gas bladder shell 452 through the flow cylinder 464. It is an intermediate carrier for gas transmission and plays the role of transmitting the deformation force of the photosensitive unit 462. The flow cylinder 464 is disposed at the connection between the fan-shaped gas storage bladders 463 and the gas bladder shell 452. The flow cylinder 464 serves as a channel for gas transmission between the fan-shaped gas storage bladders 463 and the gas bladder shell 452, ensuring directional gas flow. At the same time, the internal lightweight baffle 465, spring 468 and other structures can control the gas flow and backflow. Multiple sliding shafts 466 are fixedly connected inside the flow cylinder 464. The sliding shafts 466 provide sliding support for the lightweight baffle 465 and the compression ring 467, ensuring that they can move in a specific direction under the action of gas pressure. This system controls the gas flow. A lightweight baffle 465 is slidably connected to the outer side of the sliding shaft 466. Under gas pressure, the lightweight baffle 465 can slide on the sliding shaft 466, controlling the opening and closing of the flow cylinder 464 through its own position change, thus achieving unidirectional or bidirectional gas flow control. A compression ring 467 is also slidably connected to the outer side of the sliding shaft 466. The compression ring 467, in conjunction with a spring 468, provides elastic restoring force when the lightweight baffle 465 moves, helping the lightweight baffle 465 to reset when the gas pressure changes, ensuring the stability and repeatability of gas flow control. Furthermore, a spring 468 is provided between the outer side of the compression ring 467 and the end of the sliding shaft 466, providing elastic support for the compression ring 467, enabling the compression ring 467 to buffer and reset the movement of the lightweight baffle 465, ensuring the stable operation of the gas control structure inside the flow cylinder 464. Both the airbag outer shell 452 and the fan-shaped air storage bag 463 are deformable, and the flow tube 464 is sealed to the fan-shaped air storage bag 463 and the airbag outer shell 452.

[0040] The diffusion layer 47 includes a fixed frame 471 fixedly connected to the top of the limiting plate 44. The fixed frame 471 provides a mounting frame 461 for the components of the diffusion layer 47, such as the protective film 472, the diffusion film 473, and the fixed shaft 474, ensuring the integration and relative stability of the various parts of the diffusion layer 47. The protective film 472 and the diffusion film 473 are arranged inside the fixed frame 471. The protective film 472 is located below the diffusion film 473 and is pushed up when the light-transmitting airbag 45 expands. The contraction movement of its edge drives the hinge 475 to rotate, providing power for the shape adjustment of the diffusion film 473 and at the same time providing a certain protection for the diffusion film 473. Under the action of the protective film 472 and the hinge 475, the diffusion film 473 expands with the light-transmitting airbag 45, exhibiting an increase in the density of scattered particles at the center and a decrease in the density of scattered particles at the edge. The system achieves gradient scattering adjustment of light, optimizing the uniformity of display brightness. Four fixed shafts 474 are fixedly connected to the four sides of the fixed frame 471. These fixed shafts 474 provide rotational support for the hinges 475, ensuring stable rotation of the hinges 475 on the fixed shafts 474. This transmits the movement of the protective film 472 to the diffuser film 473, achieving coordinated adjustment between the two. Hinges 475 are rotatably connected to the outer side of the fixed shafts 474. The two ends of the hinges 475 are respectively hinged to the outer sides of the diffuser film 473 and the protective film 472, converting the contraction movement of the protective film 472 into the expansion movement of the diffuser film 473. This achieves coordinated deformation of the protective film 472 and the diffuser film 473, precisely adjusting the shape of the diffuser film 473. The outer diameters of both the protective film 472 and the diffuser film 473 are larger than the inner diameter of the internal rectangular groove of the fixed frame 471, and the protective film 472 is positioned below the diffuser film 473.

[0041] Reference Figure 1 and Figure 2Another embodiment of the present invention provides an LCD display screen including the diffusion module, applicable to any of the above-mentioned diffusion modules. It includes a display housing 1, which provides external protection for all components inside the display screen, such as the protective layer 3, brightness enhancement film 5, and display panel core layer 6, preventing damage to the internal structure from external dust, moisture, etc. An adjustment bracket 2 is provided on the rear side of the display housing 1, supporting the display housing 1 and allowing adjustment of the display screen's angle and position, facilitating user adjustment of the viewing angle according to needs. Inside the display housing 1, from front to back, are arranged the protective layer 3, brightness enhancement film 5, display panel core layer 6, backlight module 7, and controller 8. The protective layer 3 is located on the outermost side of the display screen, protecting the internal diffusion module and other structures from external physical damage while ensuring high light transmittance and not affecting light transmission. The light enters the diffusion module for adjustment. The brightness enhancement film 5 converges the light after the diffusion module adjustment into parallel light perpendicular to the screen direction, improving the display brightness and enhancing the visibility of the screen display. The core layer 6 of the display panel receives the light after the diffusion module adjustment and the brightness enhancement film 5 for imaging. It is the core component of the screen display image and is responsible for converting electrical signals into light images. The backlight module 7 provides basic backlight for the core layer 6 of the display panel. Under the coordinated control of the controller 8, the backlight brightness can be appropriately adjusted according to the adjustment of the diffusion module to further optimize the display effect. The controller 8 collects relevant information such as external light in real time and coordinates the operation of the diffusion module, backlight module 7 and other parts to ensure that the entire display screen can present a uniform and clear image under different lighting conditions. The diffusion module 4 is located between the protective layer 3 and the brightness enhancement film 5.

[0042] Working Principle: When external light shines on the LCD screen, it first passes through the protective layer 3 on the front side of the display casing 1 and reaches the diffusion module located between the protective layer 3 and the brightness enhancement film 5. In the diffusion module, the light shines on the photosensitive unit 462 of the photosensitive element 46. Since the photosensitive unit 462 is a liquid crystal elastomer with a photothermal agent introduced, and its deformation direction is limited by the first limiting plate 42, the second limiting plate 44, and the anti-detachment strip 43, the photosensitive unit 462 will deform accordingly as the light intensity changes. When the light is stronger, the photosensitive unit 462 absorbs more light energy and converts it into heat energy, resulting in more obvious deformation, which in turn squeezes the adjacent fan-shaped air bladder 463. After being squeezed, the internal gas of the fan-shaped air bladder 463 flows through the flow tube 464 into the air bladder shell 452 of the light-transmitting air bladder 45. Inside the flow cylinder 464, the air pressure causes the lightweight baffle 465 to move towards the light-transmitting airbag 45, simultaneously compressing the spring 468. When the lightweight baffle 465 completely slides out of the flow cylinder 464, the gas inside the fan-shaped airbag 463 flows into the light-transmitting airbag 45. The outer shell 452 of the light-transmitting airbag 45 forms four sealed chambers corresponding to the fan-shaped airbag 463 through four partition plates 454. This causes the incoming gas to expand and deform in different areas of the outer shell 452. After the light intensity weakens and the photosensitive unit 462 recovers its deformation, the low pressure inside the fan-shaped airbag 463 causes the lightweight baffle 465 to slide towards the fan-shaped airbag 463 and open the flow cylinder 464, allowing the gas to flow back into the fan-shaped airbag 463 for subsequent readjustment.

[0043] As multiple light-transmitting airbags 45 expand to varying degrees due to the entry of gas, they cause changes in the upper diffusion layer 47. The expansion of the light-transmitting airbags 45 pushes the protective film 472 upward, and its edges tend to contract, thereby driving the hinge 475 to rotate on the fixed axis 474. This causes the diffusion film 473 to expand in the opposite direction at its edges while being pushed up synchronously with the protective film 472. This increases the density of scattering particles in the center of the pushed-up area, enhancing the scattering of external strong light, while reducing the density of scattering particles in the edge area, reducing the scattering of the screen's own light emission. Thus, the strong light area weakens the interference of external strong light through high scattering, while the weak light area retains the screen's own light emission through low scattering, thereby leveling the visual brightness of both areas and making the screen appear more uniform overall. The light, after being adjusted by the diffusion module, then passes through the brightness enhancement film 5, which focuses the light into parallel light perpendicular to the screen direction, improving the display brightness. Next, light enters the core layer 6 of the display panel. The core layer 6 receives the adjusted and brightened light to form an image. Simultaneously, the backlight module 7 provides basic backlight control for the core layer 6, and in conjunction with the adjustment of the diffusion module, appropriately reduces the backlight brightness to achieve a better display effect, ultimately presenting a uniform and clear image on the screen. Throughout the process, the controller 8 collects relevant light and other information in real time, coordinating the operation of each component to ensure optimized display performance.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A diffusion module, comprising a diffusion module (4), characterized in that: The diffusion module (4) includes a base plate (41), and multiple light-transmitting airbags (45) are arranged in a rectangular row on the top of the base plate (41). A light sensor (46) is provided on the outside of the light-transmitting airbags (45). The light-transmitting airbag (45) includes a mounting base (451) fixedly connected to the top of the base plate (41), an airbag shell (452) fixedly connected to the top of the mounting base (451), and a central shaft (453) fixedly connected to the center of the mounting base (451), with four partition plates (454) provided on the outside of the central shaft (453). The photosensitive element (46) includes a mounting frame (461), a photosensitive unit (462) is provided on the inner side of the mounting frame (461), four fan-shaped air storage bags (463) are provided between the photosensitive unit (462) and the air bag shell (452), a flow tube (464) is provided at the connection between the fan-shaped air storage bags (463) and the air bag shell (452), a plurality of sliding shafts (466) are fixedly connected inside the flow tube (464), and a lightweight baffle plate (465) is slidably connected to the outer side of the sliding shaft (466), a compression ring (467) is also slidably connected to the outer side of the sliding shaft (466), and a spring (468) is provided between the outer side of the compression ring (467) and the end of the sliding shaft (466). Both the airbag shell (452) and the fan-shaped air storage bag (463) are deformable, and the flow tube (464) is sealed to the fan-shaped air storage bag (463) and the airbag shell (452); The photosensitive unit (462) is a liquid crystal elastomer, and a photothermal agent is introduced inside it. The deformation direction of the photosensitive unit (462) is restricted by the first limiting plate (42), the second limiting plate (44) and the anti-detachment strip (43).

2. The diffusion module according to claim 1, characterized in that: The outer side of the partition plate (454) is sealed to the airbag shell (452) and the mounting chassis (451), and the airbag shell (452) forms four sealed chambers corresponding to the fan-shaped air storage bag (463) through the four partition plates (454).

3. The diffusion module according to claim 1, characterized in that: The top of the base plate (41) is provided with a first limiting plate (42) and a second limiting plate (44). An anti-detachment strip (43) is fixedly connected between the first limiting plate (42) and the second limiting plate (44). A light sensor (46) is provided between the first limiting plate (42), the second limiting plate (44) and the anti-detachment strip (43). A diffusion layer (47) is fixedly connected to the top of the second limiting plate (44).

4. The diffusion module according to claim 3, characterized in that: The diffusion layer (47) includes a fixed frame (471) fixedly connected to the top of the limiting plate (44). A protective film (472) and a diffusion film (473) are provided on the inner side of the fixed frame (471). Four fixed shafts (474) are fixedly connected to the four sides of the fixed frame (471). A hinge (475) is rotatably connected to the outer side of the fixed shaft (474), and the two ends of the hinge (475) are respectively hinged to the outer side of the diffusion film (473) and the protective film (472).

5. The diffusion module according to claim 4, characterized in that: The outer diameters of the protective film (472) and the diffusion film (473) are both larger than the inner diameter of the inner rectangular groove of the fixed frame (471), and the protective film (472) is located below the diffusion film (473).

6. An LCD display screen, comprising a display housing (1) and a diffusion module as described in any one of claims 1-5, characterized in that: The display housing (1) is characterized in that: an adjustment bracket (2) is provided on the rear side of the display housing (1), and a protective layer (3), a brightness enhancement film (5), a display panel core layer (6), a backlight module (7) and a controller (8) are arranged sequentially from front to back inside the display housing (1), and a diffusion module (4) is arranged between the protective layer (3) and the brightness enhancement film (5).

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