Diffusion module and LCD display screen comprising same

Abstract

The invention relates to the technical field of display, and discloses a diffusion module and an LCD display screen comprising the diffusion module, the diffusion module comprises a bottom plate, a plurality of light-transmitting air bags are distributed on the top of the bottom plate in a rectangular array mode, light sensing parts are arranged on the outer sides of the light-transmitting air bags, and each light-transmitting air bag comprises a mounting chassis fixedly connected to the top of the bottom plate; an air bag shell is fixedly connected to the top of the mounting chassis, a center shaft is fixedly connected to the center position of the mounting chassis, four partition plates are arranged on the outer side of the center shaft, the light sensing part comprises a mounting frame, a light sensing unit is arranged on the inner side of the mounting frame, and four fan-shaped air storage bags are arranged between the light sensing unit and the air bag shell. According to the invention, the diffusion film is enabled to present the distribution characteristics of high scattering in a strong light area and low light transmission in a weak light area, the influence of external illumination difference on the display effect is effectively balanced, the brightness uniformity of the screen in a complex illumination environment is improved, and the overall consistency of a display picture is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of display technology, in particular to a diffusion module and an LCD display screen comprising the same. BACKGROUND

[0002] The diffusion module is the core light adjusting component of the LCD display screen, and its core function is to scatter and distribute the external environmental light entering the display screen and the basic light source emitted by the backlight module, to avoid the formation of local bright spots or dark areas on the screen surface by adjusting the propagation path and scattering intensity of the light, thereby ensuring the brightness uniformity of the display picture and improving the user viewing experience. Such diffusion modules are widely used in various LCD display devices such as outdoor advertising screens, vehicle-mounted display terminals, notebook computer displays, smart televisions, etc., especially in use scenarios where the external light intensity fluctuates greatly and the spatial distribution is uneven (such as outdoor strong light environment, vehicle-mounted dynamic light environment), the light adjusting performance of the diffusion module directly determines the stability of the display effect of the display screen.

[0003] At present, the diffusion modules used in existing LCD display screens are mostly designed with static structure, and the typical structure mainly includes a fixed bottom plate, a single layer or multiple layers of fixed diffusion films, and some schemes may add a static prism layer or a brightness enhancement film to assist in improving the light utilization efficiency. The core structural components (such as diffusion films, prism layers) of these existing diffusion modules are in a fixed form, and the key parameters such as scattering particle density and light refraction angle remain constant after production and manufacturing, which makes it difficult to dynamically adjust according to changes in external light conditions, resulting in overexposure and whitening in strong light direct radiation areas under complex lighting environments, and display brightness loss in weak light areas due to excessive scattering, causing poor overall brightness uniformity of the screen.

[0004] Therefore, in view of the above problems, a diffusion module and an LCD display screen comprising the same are proposed to solve the above problems. SUMMARY

[0005] In order to make up for the above shortcomings, the present application provides a diffusion module and an LCD display screen comprising the same, aiming to improve the problem of poor overall brightness uniformity of the screen caused by the difficulty of dynamic adjustment of some diffusion modules in the prior art according to changes in external light conditions.

[0006] In order to achieve the above purpose, the present application adopts the following technical solutions: The diffusion module comprises a diffusion module, the diffusion module comprises a bottom plate, the top of the bottom plate is arranged with a plurality of light-transmitting air bags in a rectangular array, and a light sensing element is arranged on the outer side of the light-transmitting air bag. The light-transmitting air bag comprises a mounting base plate fixedly connected to the top of the bottom plate, a gas bag shell fixedly connected to the top of the mounting base plate, and a central shaft fixedly connected to the center of the mounting base plate, and four partition plates are arranged on the outer side of the central shaft. The light-sensitive part comprises a mounting frame, a photosensitive unit is arranged on the inner side of the mounting frame, four fan-shaped air storage bags are arranged between the photosensitive unit and the gas bag shell, a flow-through cylinder is arranged at the communication part between the fan-shaped air storage bags and the gas bag shell, a plurality of sliding shafts are fixedly connected in the flow-through cylinder, a lightweight baffle is slidably connected to the outer side of the sliding shafts, a compression ring is also slidably connected to the outer side of the sliding shafts, and a spring is arranged between the outer side of the compression ring and the end of the sliding shaft. Further description of the above technical solution: The outer side of the partition plate is sealingly connected between the gas bag shell and the mounting base plate, and the gas bag shell forms four sealed chambers corresponding to the fan-shaped air storage bags through the four partition plates. Further description of the above technical solution: The photosensitive unit is a liquid crystal elastomer, and a photothermal agent is introduced into the inside, and the deformation direction of the photosensitive unit is limited by the limiting plate one, the limiting plate two and the anti-dropping strip. Further description of the above technical solution: The gas bag shell and the fan-shaped air storage bag can be deformed, and the flow-through cylinder is sealingly connected between the fan-shaped air storage bag and the gas bag shell. Further description of the above technical solution: The top of the bottom plate is provided with a limiting plate one and a limiting plate two, the limiting plate one and the limiting plate two are fixedly connected with an anti-dropping strip, the light-sensitive part is arranged between the limiting plate one, the limiting plate two and the anti-dropping strip, and the top of the limiting plate two is fixedly connected with a diffusion layer. Further description of the above technical solution: The diffusion layer comprises a fixed frame fixedly connected to the top of the limiting plate two, a protective film and a diffusion film are arranged on the inner side of the fixed frame, four fixed shafts are respectively fixedly connected to the four sides of the fixed frame, hinges are rotatably connected to the outer sides of the fixed shafts, and the two ends of the hinges are respectively hinged to the outer sides of the diffusion film and the protective film. Further description of the above technical solution: The outer diameters of the protective film and the diffusion film are greater than the inner diameter of the rectangular groove in the fixed frame, and the protective film is arranged below the diffusion film. The LCD display screen comprising the diffusion module is suitable for any one of the above-mentioned diffusion modules, and comprises a display shell, an adjusting support is arranged on the rear side of the display shell, a protective layer, a brightness enhancement film, a display panel core layer, a backlight module and a controller are arranged in the display shell from front to back, and the diffusion module is arranged between the protective layer and the brightness enhancement film.

[0007] The present application has the following beneficial effects: 1、In the present application, the light-sensitive unit of the light sensing member generates directional deformation under light irradiation, extruding the fan-shaped gas storage bag to make the gas flow to the light-transmitting gas bag through the flow passage, driving the gas bag shell of the light-transmitting gas bag to form differential expansion, and further driving the protective film and the diffusion film of the diffusion layer to rotate through the hinge to realize gradient deformation. The linkage of the structure makes the diffusion film present the distribution characteristics of high scattering in strong light area and low light transmission in weak light area, effectively balancing the influence of external light difference on display effect, improving the brightness uniformity of the screen in complex light environment, and ensuring the overall consistency of the display picture.

[0008] 2、In the present application, the deformable fan-shaped gas storage bag and the light-transmitting gas bag are used as power transmission carriers, combined with the bidirectional flow control structure composed of the light weight flow barrier and the spring in the flow passage, to realize directional and quantitative transmission of the gas; at the same time, through the rotating cooperation of the fixed shaft and the hinge, the diffusion film is accurately linked with the expansion of the light-transmitting gas bag. This design not only ensures the linear response of light intensity and diffusion adjustment, but also improves the stability and reliability of the structure operation, and enhances the self-adaptive ability of the device to dynamic light environment. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 A perspective view of a diffusion module and an LCD display screen comprising the diffusion module according to the present application; Figure 2 A structural view of a display housing of a diffusion module and an LCD display screen comprising the diffusion module according to the present application; Figure 3 A structural view of a diffusion module of a diffusion module and an LCD display screen comprising the diffusion module according to the present application; Figure 4 An exploded view of a diffusion module of a diffusion module and an LCD display screen comprising the diffusion module according to the present application; Figure 5 A structural view of a light-transmitting gas bag of a diffusion module and an LCD display screen comprising the diffusion module according to the present application; Figure 6 A structural view of a diffusion layer of a diffusion module and an LCD display screen comprising the diffusion module according to the present application; Figure 7 A structural view of a diffusion layer of a diffusion module and an LCD display screen comprising the diffusion module according to the present application; Figure 5 An enlarged view of A in FIG. 1; Figure 8 An enlarged view of B in FIG. 1. Figure 6 An enlarged view of B in FIG. 1.

[0010] LEGEND: 1, display housing; 2, adjusting support; 3, protective layer; 4, diffusion module; 41, bottom plate; 42, limiting plate one; 43, anti-off strip; 44, limiting plate two; 45, light-transmitting air bag; 451, mounting base; 452, air bag housing; 453, central shaft; 454, partition plate; 46, light sensing piece; 461, mounting frame; 462, light sensitive unit; 463, fan-shaped air storage bag; 464, flow-through cylinder; 465, light baffle; 466, sliding shaft; 467, compression ring; 468, spring; 47, diffusion layer; 471, fixed frame; 472, protective film; 473, diffusion film; 474, fixed shaft; 475, hinge; 5, brightness enhancement film; 6, display panel core layer; 7, backlight module; 8, controller. DETAILED DESCRIPTION

[0011] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0012] REFERENCE Figures 3 to 8An embodiment provided by the present application: the diffusion module includes a diffusion module 4, the diffusion module 4 is the core bearing structure of the whole diffusion module, integrates the key components such as bottom plate 41, light transmission air bag 45, light sensing piece 46, provides basic support for the cooperative work of each part, guarantees the orderly development of light sensing adjustment and diffusion function, the diffusion module 4 includes bottom plate 41, the bottom plate 41 provides installation basis for the structure such as light transmission air bag 45, limiting plate one 42, limiting plate two 44, ensures the relative position stability of each component in space, is the bottom support carrier of diffusion module, the top of bottom plate 41 is rectangularly arranged with multiple light transmission air bags 45, the light transmission air bag 45 can be deformed under the action of gas, the differential inflation of different areas provides power for the form adjustment of the upper diffusion layer 47, and then realizes the dynamic adjustment of light diffusion effect, the outside of light transmission air bag 45 is provided with light sensing piece 46, the light sensing piece 46 is used for sensing the change of external light intensity, the photosensitive unit 462 in its inside can convert light energy into heat energy and produce deformation, provides power source for the gas extrusion of fan-shaped gas storage bag 463, is the starting link of realizing light control adjustment. The top of bottom plate 41 is provided with limiting plate one 42 and limiting plate two 44, limiting plate one 42 and limiting plate two 44 limit the deformation direction of photosensitive unit 462, so that it can only expand to the middle direction, ensure the directionality of photosensitive unit 462 deformation, thereby accurately extruding fan-shaped gas storage bag 463, limiting plate one 42 and limiting plate two 44 are fixedly connected with anti-drop strip 43, the anti-drop strip 43 connects limiting plate one 42 and limiting plate two 44, further strengthens the limiting effect of light sensing piece 46, prevents the position deviation of light sensing piece 46 in the working process, ensures the stability of light sensing adjustment, and the light sensing piece 46 is arranged between limiting plate one 42, limiting plate two 44 and anti-drop strip 43, the top of limiting plate two 44 is fixedly connected with diffusion layer 47, the diffusion layer 47 receives the power brought by the inflation of light transmission air bag 45, realizes the gradient adjustment of light scattering degree through the form change of protective film 472 and diffusion film 473, makes strong light area high scattering, weak light area low light transmission, optimizes the brightness uniformity of screen display.

[0013] The light-transmitting air bag 45 comprises a mounting base plate 451 fixedly connected at the top of the bottom plate 41, which provides a fixed base for the air bag shell 452 and the central shaft 453, ensures the relative position stability of each component of the light-transmitting air bag 45, and is an important guarantee for the structural stability of the light-transmitting air bag 45. The top of the mounting base plate 451 is fixedly connected with the air bag shell 452, which can be deformed and forms multiple sealed chambers through the partition plates 454, can produce different degrees of expansion according to the amount of entering gas, and provides direct power transmission for the adjustment of the diffusion layer 47. The central position of the mounting base plate 451 is fixedly connected with the central shaft 453, which provides an installation center for the partition plates 454, assists the partition plates 454 to separate the air bag shell 452 into multiple sealed chambers, and ensures that the air bag shell 452 can be differentially expanded in different regions after the gas enters. The outer side of the central shaft 453 is provided with four partition plates 454, which separate the air bag shell 452 into sealed chambers corresponding to the fan-shaped gas storage bag 463, so that the entering gas can accurately act on a specific region of the air bag shell 452, realize differential expansion adjustment, and the outer side of the partition plate 454 is sealingly connected between the air bag shell 452 and the mounting base plate 451. The air bag shell 452 forms four sealed chambers corresponding to the fan-shaped gas storage bag 463 through the four partition plates 454.

[0014] The light sensing part 46 includes a mounting frame 461, which provides a mounting frame 461 frame for the internal components of the light sensing part 46, such as the light sensitive unit 462, the fan-shaped gas pocket 463, etc., to ensure the integration and stability of the structure of each part of the light sensing part 46. The inner side of the mounting frame 461 is provided with the light sensitive unit 462, which is a liquid crystal elastomer and internally introduces a photo-thermal agent, and the deformation direction of the light sensitive unit 462 is limited by the limiting plate one 42, the limiting plate two 44 and the anti-dropping strip 43. The light sensitive unit 462 uses a liquid crystal elastomer that introduces a photo-thermal agent, which can produce corresponding deformation with the change of light intensity, is the core functional component of light sensing adjustment, and provides initial power for subsequent gas extrusion and diffusion adjustment. Four fan-shaped gas pockets 463 are arranged between the light sensitive unit 462 and the gas pocket shell 452. The fan-shaped gas pockets 463 can be deformed and will transport the internal gas to the gas pocket shell 452 through the flow-through barrel 464 under the extrusion of the light sensitive unit 462, and are intermediate carriers for gas transmission, which play a role in transmitting the deformation power of the light sensitive unit 462. The flow-through barrel 464 is arranged between the fan-shaped gas pockets 463 and the gas pocket shell 452, and serves as a channel for the transmission of gas between the fan-shaped gas pockets 463 and the gas pocket shell 452, which ensures the directional flow of the gas. The internal lightweight baffle 465 and spring 468 can control the flow and backflow of the gas. The flow-through barrel 464 is fixedly connected with a plurality of sliding shafts 466 inside. The sliding shafts 466 provide sliding support for the lightweight baffle 465 and the compression ring 467, which can move in a specific direction under the action of gas pressure, realizing the control of gas flow. The outer side of the sliding shaft 466 is slidably connected with the lightweight baffle 465, which can slide on the sliding shaft 466 under the action of gas pressure, control the on-off of the flow-through barrel 464 by changing its position, and realize the one-way or two-way flow control of the gas. The outer side of the sliding shaft 466 is also slidably connected with the compression ring 467. The compression ring 467 cooperates with the spring 468 to provide 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 the gas flow control. The spring 468 is arranged between the outer side of the compression ring 467 and the end of the sliding shaft 466, which provides elastic support for the compression ring 467, enabling the compression ring 467 to buffer and reset the movement of the lightweight baffle 465, and ensuring the stable operation of the gas control structure in the flow-through barrel 464. The gas pocket shell 452 and the fan-shaped gas pockets 463 can be deformed, and the flow-through barrel 464 is sealingly connected with the fan-shaped gas pockets 463 and the gas pocket shell 452.

[0015] The diffusion layer 47 includes a fixed frame 471 fixedly connected to the top of the limiting plate two 44, the fixed frame 471 provides a mounting frame 461 for the diffusion layer 47 components such as the protective film 472, the diffusion film 473 and the fixed shaft 474, ensures the integration and relative position stability of the diffusion layer 47 structure, the inner side of the fixed frame 471 is provided with the protective film 472 and the diffusion film 473, the protective film 472 is located below the diffusion film 473 and is lifted when the light-transmitting air bag 45 expands, the contraction movement of the edge of the protective film 472 drives the hinge 475 to rotate, provides power for the shape adjustment of the diffusion film 473, and at the same time plays a certain protection role for the diffusion film 473, under the action of the protective film 472 and the hinge 475, the diffusion film 473 presents the shape of increasing central scattering particle density and reducing edge scattering particle density with the expansion of the light-transmitting air bag 45, realizes the gradient scattering adjustment of light, optimizes the display brightness uniformity, the four fixed shafts 474 are respectively fixedly connected to the four sides of the fixed frame 471, the fixed shaft 474 provides rotating support for the hinge 475, ensures that the hinge 475 can stably rotate on the fixed shaft 474, thereby transmitting the movement of the protective film 472 to the diffusion film 473, realizes the linkage adjustment of the two, the hinge 475 is rotatably connected to the outer side of the fixed shaft 474, the two ends of the hinge 475 are respectively hinged to the outer sides of the diffusion film 473 and the protective film 472, converts the contraction movement of the protective film 472 into the expansion movement of the diffusion film 473, realizes the linkage deformation of the protective film 472 and the diffusion film 473, accurately adjusts the shape of the diffusion film 473, and the two ends of the hinge 475 are respectively hinged to the outer sides of the diffusion film 473 and the protective film 472.

[0016] With reference to Figure 1 With reference to Figure 2The LCD display screen comprising the diffusion module is suitable for any one of the diffusion modules, and includes a display shell 1. The display shell 1 provides external protection for all components inside the display screen, such as a protective layer 3, a brightness enhancement film 5 and a display panel core layer 6, to prevent damage to the internal structure caused by external dust, water vapor and the like. An adjusting support 2 is arranged at the rear side of the display shell 1, and is used to support the display shell 1 and adjust the angle and position of the display screen, so as to facilitate the user to adjust the viewing angle according to the requirement. The inside of the display shell 1 is sequentially provided from front to back with the protective layer 3, the brightness enhancement film 5, the display panel core layer 6, a backlight module 7 and a controller 8. The protective layer 3 is located at the outermost side of the display screen, protects the internal diffusion module and other structures from external physical damage, ensures high light transmittance of light, and does not affect the light entering the diffusion module for adjustment. The brightness enhancement film 5 converges the light adjusted by the diffusion module into parallel light in the vertical screen direction, improves the display brightness, and enhances the visibility of the screen display. The display panel core layer 6 receives the light adjusted by the diffusion module and brightened by the brightness enhancement film 5 to form an image, and is a core component of the screen display image, which is responsible for converting electrical signals into optical images. The backlight module 7 provides basic backlight for the display panel core layer 6, and adjusts the backlight brightness according to the adjustment of the diffusion module under the cooperative control of the controller 8, to further optimize the display effect. The controller 8 collects related information of external light and the like in real time, cooperatively controls the diffusion module, the backlight module 7 and other parts, and ensures that the entire display screen can present uniform and clear images under different lighting environments. The diffusion module 4 is arranged between the protective layer 3 and the brightness enhancement film 5.

[0017] Working principle: when the external light shines on the LCD display, first, the light passes through the protective layer 3 on the front side of the display shell 1, reaches the diffusion module between the protective layer 3 and the brightness enhancement film 5. In the diffusion module, the light shines on the light sensitive unit 462 of the light sensing piece 46. Since the light sensitive unit 462 is a liquid crystal elastomer with light heat agent, and its deformation direction is limited by the limiting plate one 42, the limiting plate two 44 and the anti-off strip 43, only to the middle, with the change of light intensity, the light sensitive unit 462 will produce corresponding deformation. When the light is strong, the light sensitive unit 462 absorbs more light energy and converts it into heat energy, which deforms more obviously, and then squeezes the adjacent fan-shaped air bag 463. After the fan-shaped air bag 463 is squeezed, the internal gas flows into the air bag shell 452 of the light transmission air bag 45 through the flow tube 464. Inside the flow tube 464, the light weight baffle 465 moves to the light transmission air bag 45 direction due to the action of gas pressure, at the same time, the compression spring 468 is compressed, and when the light weight baffle 465 completely slides out of the flow tube 464, the gas in the fan-shaped air bag 463 flows to the inside of the light transmission air bag 45, and the air bag shell 452 of the light transmission air bag 45 forms four sealed chambers corresponding to the fan-shaped air bag 463 through four partition plates 454, so that the entering gas makes the different areas of the air bag shell 452 respectively deform and swell, and when the light intensity becomes weak and the light sensitive unit 462 restores the deformation, the light weight baffle 465 slides to the fan-shaped air bag 463 direction and opens the flow tube 464 due to the low pressure in the fan-shaped air bag 463, so that the gas backflows into the fan-shaped air bag 463, in order to adjust again subsequently.

[0018] With the multiple light-transmitting air bags 45 being inflated to different degrees due to the entry of gas, the upper diffusion layer 47 is pushed to change. The inflation of the light-transmitting air bags 45 causes the protective film 472 to be pushed up and the edge to move in a shrinking trend, thereby driving the hinge 475 to rotate on the fixed shaft 474, and further causing the diffusion film 473 to be pushed up synchronously with the protective film 472 while the edge expands in the opposite direction, so as to increase the central scattering particle density of the area that is pushed up, enhance the scattering of external strong light, and reduce the scattering particle density of the edge area, thereby reducing the scattering of the screen's own light emission, so that the strong light area weakens the interference of external strong light through high scattering, and the weak light area retains the screen's own light emission through low scattering, thereby making the visual brightness of the two areas be leveled, and the screen looks more uniform as a whole. After the light is adjusted by the diffusion module, it then passes through the brightness enhancement film 5, which converges the light into parallel light in the vertical screen direction, thereby improving the display brightness. Subsequently, the light enters the display panel core layer 6, which receives the adjusted and brightened light to form an image, while the backlight module 7 provides basic backlight control for the display panel core layer 6, cooperates with the adjustment of the diffusion module, and appropriately reduces the backlight brightness to achieve better display effect, and finally presents a uniform and clear image on the display screen. During the entire process, the controller 8 collects relevant light information in real time, cooperates with the control of each part to ensure the optimization of display effect.

[0019] Finally, it should be noted that: the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application 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 replacements to some technical features, as long as they are within the spirit and principles of the present application. Any modification, equivalent replacement, improvement, etc. made shall be included in the protection scope of the present application.

Claims

1. Diffusion module comprising a diffusion module (4), characterized in that: The diffusion module (4) comprises a bottom plate (41), and a plurality of light-transmitting air bags (45) are arranged in a rectangular array on the top of the bottom plate (41), and a light sensing element (46) is arranged on the outer side of the light-transmitting air bag (45); The light-transmitting air bag (45) comprises a mounting base plate (451) fixedly connected to the top of the bottom plate (41), a gas bag shell (452) fixedly connected to the top of the mounting base plate (451), and a central shaft (453) fixedly connected to the center position of the mounting base plate (451), and four partition plates (454) are arranged on the outer side of the central shaft (453); The light sensing element (46) comprises a mounting frame (461), and a photosensitive unit (462) is arranged on the inner side of the mounting frame (461), four fan-shaped air storage bags (463) are arranged between the photosensitive unit (462) and the gas bag shell (452), a flow passage (464) is arranged between the fan-shaped air storage bag (463) and the gas bag shell (452), a plurality of sliding shafts (466) are fixedly connected in the flow passage (464), a light weight baffle (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 arranged between the outer side of the compression ring (467) and the end of the sliding shaft (466).

2. Diffusion module according to claim 1, characterized in that: The outer side of the partition plate (454) is sealingly connected between the gas bag shell (452) and the mounting base plate (451), and the gas bag 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 of claim 1, wherein: The photosensitive unit (462) is a liquid crystal elastomer, and a photothermal agent is introduced into the photosensitive unit (462), and the deformation direction of the photosensitive unit (462) is limited by the limiting plate one (42), the limiting plate two (44) and the anti-dropping strip (43).

4. The diffusion module of claim 1, wherein: The gas bag shell (452) and the fan-shaped air storage bag (463) can be deformed, and the flow passage (464) is sealingly connected between the fan-shaped air storage bag (463) and the gas bag shell (452).

5. The diffusion module of claim 1, wherein: The top of the bottom plate (41) is provided with a limiting plate one (42) and a limiting plate two (44), the limiting plate one (42) and the limiting plate two (44) are fixedly connected with an anti-dropping strip (43), and the light sensing element (46) is arranged between the limiting plate one (42), the limiting plate two (44) and the anti-dropping strip (43), and the top of the limiting plate two (44) is fixedly connected with a diffusion layer (47).

6. Diffusion module according to claim 5, characterized in that: The diffusion layer (47) comprises a fixed frame (471) fixedly connected to the top of the limiting plate two (44), a protective film (472) and a diffusion film (473) are arranged on the inner side of the fixed frame (471), four fixed shafts (474) are respectively fixedly connected to the four sides of the fixed frame (471), hinges (475) are rotatably connected to the outer sides of the fixed shafts (474), and the two ends of the hinges (475) are respectively hinged to the outer sides of the diffusion film (473) and the protective film (472).

7. Diffusion module according to claim 6, characterized in that: The outer diameters of the protective film (472) and the diffusion film (473) are greater than the inner diameter of the rectangular groove in the fixed frame (471), and the protective film (472) is arranged below the diffusion film (473).

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

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