A light leakage-proof splicing screen and a combined screen thereof

Abstract

The present invention discloses an anti-light leakage splicing screen and a combination screen thereof, and belongs to the technical field of educational equipment. The present invention overcomes the shortcomings of the prior art caused by the light leakage phenomenon caused by the long-term use of the splicing screen, and provides an anti-light leakage splicing screen, wherein the module profile is directly extended to the bottom of the liquid crystal glass and protrudes from the diffuser plate, and a cavity for the diffuser plate to deform freely is formed between the liquid crystal glass and the diffuser plate, and the rubber frame design is cancelled between the diffuser plate and the module profile, which effectively prevents the heat deformation of the rubber frame caused by the long-term use of the backlight module, and compresses the edge to turn outward, thereby avoiding the occurrence of light leakage. The present invention also provides an anti-light leakage combination screen, which is formed by combining and splicing at least two splicing screens, and the two independent flanges used for pressing the liquid crystal glass are set to share a flange and extend in two opposite directions, narrowing the physical joint seam, while eliminating the process of splicing the two edges, simplifying the installation process of the splicing screen.

Description

Technical Field

[0001] The invention belongs to the technical field of educational equipment, and more specifically, relates to a light leakage-proof splicing screen and a combined screen thereof. Background Art

[0002] Limited by the maximum size of a single display screen, splicing is mainly used to effectively realize a larger display size. In theory, any number of single displays can be spliced ​​together, and the aspect ratio can be set at will. Therefore, it is widely used in security, monitoring, medical treatment, radio and television, advertising and media and other fields.

[0003] As a complete display unit, the LCD splicing screen can be used as a single display or as an ultra-large screen. According to different usage requirements, it can realize various large-screen functions that can be enlarged or reduced, such as: single-screen split display, single-screen single display, any combination display, full-screen LCD splicing, optional compensation or covering of image borders, support for roaming, zooming and stretching of digital signals and cross-screen display, setting and running of various display plans, real-time processing of full HD signals, etc., with a very wide range of applications. The needs of actual life require that the spliced ​​display screen has the characteristics of high definition, high brightness and high brightness uniformity, and most of them need to be turned on 7*24 hours, which requires higher reliability of the product.

[0004] In order to reduce the thickness of the LCD screen, most of them currently use edge-lit backlight modules. When fixing this type of LCD screen, the backlight module is generally clamped inside by the outer rubber frame and the bottom plate. The rubber frame is provided with a convex clamp to fix the light guide plate of the backlight module. However, during the long-term startup process, the spliced ​​screen body heats up, and some parts such as the rubber frame will expand due to heat, which will press on the frame, and the frame may be misaligned. The light emitted by the light source may be transmitted from the gap formed by the misalignment, resulting in the problem of frame light leakage. The problem of frame light leakage will seriously reduce the viewing effect of the spliced ​​screen, reduce the light utilization rate, and reduce the frame sealing performance. If the spliced ​​screen is used outdoors, its service life will also be reduced.

[0005] In response to the above problems, relevant technical solutions have been disclosed, such as patent application number: 2015210505642, application date is December 16, 2015, and the name of the invention is: a light leakage-proof liquid crystal display screen. The display screen disclosed in the solution includes a backlight module and a fixed frame. The fixed frame includes a bottom plate and a rubber frame that are fixedly connected. The bottom plate and the rubber frame form an accommodating space. The backlight module is arranged in the accommodating space. The backlight module includes a light guide plate, an LED module located on one side of the light guide plate, and an optical film arranged on the light guide plate. The LED module is located between the light guide plate and the rubber frame. A card slot is provided on the side of the light emitting surface of the light guide plate close to the LED module. The rubber frame extends in the direction of the light guide plate with a claw that matches the card slot. The claw is provided to block light and prevent light from being directly projected from the gap of the fixed frame to achieve the purpose of preventing light leakage.

[0006] However, the rubber frame is usually made of plastic material. The thermal deformation of the rubber frame will directly affect the shape of the claw. The other end of the claw is fixed on the light guide plate. The deformation of the claw reduces its service life and affects the performance of the light guide plate. Therefore, this solution deserves further improvement.

[0007] In summary, how to overcome the shortcomings caused by the light leakage phenomenon caused by long-term use of the spliced ​​screen in the prior art is a technical problem that urgently needs to be solved in the prior art. Summary of the invention

[0008] 1. Technical problem to be solved by the invention

[0009] The present invention overcomes the disadvantages of the prior art caused by the light leakage phenomenon caused by the long-term use of the spliced ​​screen, and provides a light leakage-proof spliced ​​screen, in which the module profile is directly extended to the bottom of the liquid crystal glass and protrudes from the diffuser plate, and a cavity for the diffuser plate to deform freely is formed between the liquid crystal glass and the diffuser plate, and the rubber frame design between the diffuser plate and the module profile is eliminated, which effectively prevents the rubber frame from being deformed by heat and compressed to turn outward due to the long-term use of the backlight module, thereby avoiding the occurrence of light leakage.

[0010] The present invention also provides an anti-light leakage combination screen, which is composed of at least two spliced ​​screens, and two independent flanges used for pressing the liquid crystal glass are arranged to share a flange and extend in two opposite directions, thereby narrowing the physical seam and eliminating the process of splicing the two edges, thereby simplifying the installation process of the spliced ​​screen.

[0011] 2. Technical solution

[0012] In order to achieve the above object, the technical solution provided by the present invention is:

[0013] The present invention provides an anti-light leakage splicing screen, comprising liquid crystal glass, a diffusion plate and a module profile used to carry the diffusion plate and arranged at the bottom thereof, one end of the module profile extends to the bottom of the liquid crystal glass and forms a first convex corner, the diffusion plate rests on the first convex corner, the side of the module profile is also provided with an edge, and the edge extends to the surface of the liquid crystal glass and forms a flange, and the liquid crystal glass is pressed and fixed by the flange and the first convex corner.

[0014] As a further improvement of the present invention, a first groove is formed on the first convex corner, and a rubber strip for limiting the sliding of the liquid crystal glass is arranged in the first groove.

[0015] As a further improvement of the present invention, the flange includes a first flange and a second flange, and the first flange and the second flange are arranged at the same end of the edge and in opposite directions to fix two adjacent liquid crystal glasses.

[0016] As a further improvement of the present invention, the first flange and the second flange are alternately distributed along the length direction of the joint formed by two adjacent pieces of liquid crystal glass.

[0017] As a further improvement of the present invention, the width of the flange is not greater than the width of the first convex corner.

[0018] As a further improvement of the present invention, the bottom of the module profile is supported and fixed by a back plate, and the bottom of the module profile is protruded along the edging direction set on the side and forms a second convex angle, so that a cavity structure for accommodating the PCB board is formed between the module profile and the edging.

[0019] As a further improvement of the present invention, one end of the PCB board is against the edge, and the other end is clamped in the second groove formed on the second convex corner.

[0020] As a further improvement of the present invention, the liquid crystal glass and the module profile are both bonded and fixed to the edge by fixing glue.

[0021] As a further improvement of the present invention, the edging and the module profile are both made of aluminum alloy, and the flange formed by the edging extending to the surface of the liquid crystal glass is arranged as an arc-shaped angle transition.

[0022] The light leakage prevention combined screen of the present invention comprises at least two of the above-mentioned light leakage prevention spliced ​​screens.

[0023] 3. Beneficial effects

[0024] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0025] (1) In the present invention, a light leakage prevention splicing screen has a first convex corner protruding relative to the surface of a diffuser plate, and a cavity is formed between the liquid crystal glass and the diffuser plate for the diffuser plate to deform freely. The deformation trend of the diffuser plate transitions from the fixed ends on both sides to the free end in the middle and is confined to the cavity, and will not squeeze the first convex corner on the side. In addition, the rubber frame design between the diffuser plate and the module profile is eliminated, which effectively prevents the rubber frame from being deformed by heat due to long-term use of the backlight module and causing the edge to turn outward, thereby avoiding the occurrence of light leakage.

[0026] (2) The anti-light leakage splicing screen of the present invention has an edge and a module profile made of aluminum alloy. Compared with plastic materials, aluminum alloy is not easy to deform and has high bearing strength. The module profile is in direct contact with and fixedly connected to the side edge. Even if individual components expand due to heat, the edge will not be misaligned due to deformation of the module profile, thereby effectively overcoming the phenomenon of frame light leakage.

[0027] (3) The anti-light leakage splicing screen of the present invention is used to cooperate with the first convex corner to press the liquid crystal glass. The flange has an extremely narrow structure, and the width of the flange is no greater than the width of the first convex corner. When the splicing screen is used for splicing and assembly, the distance between the display areas formed by two adjacent splicing screens can be 3.5 mm, which is enough to weaken the sense of separation formed by the image displayed on the splicing screen, and the light leakage problem at the splicing seam is overcome, which greatly improves the user's visual experience.

[0028] (4) The light leakage prevention combined screen of the present invention is formed by combining and splicing at least two spliced ​​screens, and the two independent flanges for pressing the liquid crystal glass are arranged to share a flange and extend in two opposite directions. This not only narrows the physical joint seam formed by the original flange to half of the original, but also eliminates the process of splicing the two flanges. Therefore, the installation process of the spliced ​​screen is simplified to a certain extent, saving labor costs.

[0029] (5) In the light leakage prevention splicing screen of the present invention, when two adjacent splicing screens share a side edge, the first flange and the second flange are staggered along the length direction of the splicing seam formed by the two adjacent liquid crystal glasses to ensure that the flange forces evenly distributed along both sides of the splicing seam are dispersed, and the forces of the first flange and the second flange are mutually restrained and balanced to prevent the edge deformation caused by the different forces on the flanges on both sides, thereby further avoiding the light leakage caused by the displacement of the edge position. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a partial cross-sectional schematic diagram of a light leakage prevention splicing screen of the present invention;

[0031] Figure 2 for Figure 1 A magnified view of the section A of the middle spliced ​​screen;

[0032] Figure 3It is a partial cross-sectional schematic diagram of the spliced ​​screen with a common edge binding in Example 2;

[0033] Figure 4 It is a partial cross-sectional schematic diagram of a light leakage prevention combined screen of the present invention;

[0034] Figure 5 It is a partial cross-sectional schematic diagram of a light leakage prevention combined screen with a common edge wrapping in the present invention;

[0035] Figure 6 This is a schematic diagram of the front structure of a light leakage prevention combined screen (with the same flange width) of Example 3;

[0036] Figure 7 This is a schematic diagram of the front structure of a light leakage prevention combined screen (with different flange widths) of Example 3;

[0037] Explanation of the symbols in the schematic diagram:

[0038] 1. Edging; 11. Flanging; 111. First flanging; 112. Second flanging; 2. Liquid crystal glass; 3. Diffuser plate; 4. Module profile; 41. First convex corner; 42. First groove; 43. Second convex corner; 44. Second groove; 5. Rubber strip; 6. PCB board; 7. Mylar sheet; 8. Back panel; 9. Fixing glue. DETAILED DESCRIPTION

[0039] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

[0040] Example 1

[0041] Combination Figure 1 and Figure 2 The present embodiment provides an anti-light leakage splicing screen, comprising a liquid crystal glass 2, a diffuser plate 3, and a module profile 4 for carrying the diffuser plate 3 and arranged at the bottom thereof, the bottom of the module profile 4 being connected to a back plate 8, one end of the module profile 4 extending to the bottom of the liquid crystal glass 2 and forming a first convex corner 41, the diffuser plate 3 abutting against the first convex corner 41, a rim 1 being further provided on the side of the module profile 4, and the rim 1 extending to the surface of the liquid crystal glass 2 and forming a flange 11, the liquid crystal glass 2 being pressed and fixed by the flange 11 and the first convex corner 41.

[0042] Specifically, in this embodiment, the module profile 4 is in direct contact with and fixedly connected to the side edge 1, and the flange 11 formed by bending the edge 1 is in direct contact with and fixedly connected to the surface of the liquid crystal glass 2. In this embodiment, the rubber frame design is eliminated, and instead, the module profile 4 is directly extended to the bottom of the liquid crystal glass 2, and the flange 11 structure extending from the side of the module profile 4 to the surface of the liquid crystal glass 2 is matched, and the liquid crystal glass 2 is fixed by pressing and clamping the flange 11 and the first convex corner 41.

[0043] Specifically, the first convex corner 41 structure formed by the module profile 4 is protruded relative to the surface of the diffuser plate 3, and a cavity is formed between the liquid crystal glass 2 and the diffuser plate 3. The cavity can allow the diffuser plate 3 to deform freely without affecting other components. Moreover, since the diffuser plate 3 is a thin product, its deformation trend transitions from the fixed ends on both sides to the free end in the middle, and the ends of the diffuser plate 3 are not constrained by the pressing force. Therefore, the deformation space of the diffuser plate 3 is limited to the cavity, and the first convex corner 41 on the side will not be squeezed, thereby effectively preventing the diffuser plate 3 from being deformed by heat due to long-term use of the backlight module and compressing the edge 1 to turn outward.

[0044] Furthermore, in the present embodiment, the edging 1 and the module profile 4 are both made of aluminum alloy. Compared with plastic materials, aluminum alloy is not easy to deform and has high bearing strength. The module profile 4 is in direct contact with and fixedly connected to the side edging 1. Even if individual components expand due to heat, the edging 1 will not be misaligned due to deformation of the module profile 4, thereby effectively overcoming the phenomenon of light leakage from the frame.

[0045] Preferably, in order to improve the structural stability of the spliced ​​screen in this embodiment, a first groove 42 is provided on the first convex corner 41 in this embodiment, and a rubber strip 5 for limiting the sliding of the liquid crystal glass 2 is provided in the first groove 42. Compared with the plastic injection molded part, the rubber strip 5 has greater friction with the liquid crystal glass 2, and the liquid crystal glass 2 is better fixed during the installation process.

[0046] In order to solve the problem of light leakage in the display screen, various technical solutions are provided in the prior art. However, it is worth emphasizing that the difference between this embodiment and the other embodiments is that this embodiment is designed with an anti-light leakage structure for the splicing screen. The structural characteristics of the splicing screen require that the frame structure be as narrow as possible to achieve seamless splicing, reduce the sense of image fragmentation, and improve the user's visual experience.

[0047] Therefore, the flange 11 used to press the liquid crystal glass 2 with the first convex corner 41 in this embodiment is an extremely narrow structure. Preferably, the width of the flange 11 in this embodiment is not greater than the width of the first convex corner 41, and the flange 11 formed by the edge 1 extending to the surface of the liquid crystal glass 2 is set to an arc angle transition to prevent the flange 11 structure from being scratched and damaged, thereby reducing the connection effect on the liquid crystal glass 2. By splicing the splicing screens of this embodiment, the display area distance formed between two adjacent splicing screens can be 3.5mm, which is enough to weaken the sense of separation formed by the splicing screen display image, and the light leakage problem at the splicing seam can be overcome, greatly improving the user's visual experience.

[0048] Example 2

[0049] Combination Figure 3The present embodiment is a light leakage prevention splicing screen, and its structure is basically the same as that of the embodiment 1, except that: when the splicing screen of the present embodiment is used for combining and splicing to form a large screen structure, the flange 11 includes a first flange 111 and a second flange 112, and the first flange 111 and the second flange 112 are arranged at the same end of the edge 1 and in opposite directions to fix two adjacent liquid crystal glasses 2.

[0050] In order to further reduce the joint seam, the present embodiment sets the two independent flanges 11 used for pressing the liquid crystal glass 2 as flanges 11 that share a rim 1 and extend in two opposite directions. The advantage of this design is that it not only narrows the physical joint seam formed by the original rim 11 to half of the original, but also eliminates the process of splicing the two rims, thereby simplifying the installation process of the spliced ​​screen to a certain extent and saving labor costs. Specifically in the present embodiment, the liquid crystal glass 2 and the module profile 4 are both bonded and fixed to the rim 1 by fixing glue 9.

[0051] In addition, in this embodiment, the bottom of the module profile 4 is supported and fixed by the back plate 8, and the bottom of the module profile 4 is protruded in the direction of the edging 1 set on the side and forms a second convex corner 43, so that a cavity structure for accommodating the PCB board 6 is formed between the module profile 4 and the edging 1.

[0052] Specifically in this embodiment, one end of the PCB board 6 is against the edge 1, and the other end is clamped in the second groove 44 provided on the second convex corner 43. A layer of Mylar sheet 7 is provided on the PCB board 6, and the PCB board 6 is further fixedly connected to the module profile 4 and the edge 1 by fixing glue 9.

[0053] In order to further reduce light leakage, in the present embodiment, the bottom of the module profile 4 is protruded toward the edge 1 to form a second convex corner 43, which provides space for installing the PCB board 6, and one end of the PCB board 6 is confined in the second groove 44 of the module profile 4, and the other end has only a small direct contact with the edge 1 structure. The module profile 4 is stamped from aluminum alloy, and its structural strength is high and not easy to deform. Therefore, the PCB board 6 will hardly cause extrusion deformation to the side edge 1, thereby reducing light leakage caused by the misalignment of the edge 1.

[0054] Example 3

[0055] Combination Figure 5 The structure of the anti-light leakage splicing screen of this embodiment is basically the same as that of embodiment 2, except that: in this embodiment, the first flange 111 and the second flange 112 are staggered along the length direction of the splicing seam formed by two adjacent liquid crystal glasses 2.

[0056] Since the edge 1 of this embodiment is an extremely narrow structure, when two adjacent spliced ​​screens share a side edge, the first flange 111 and the second flange 112 are staggered along the length direction of the splicing seam formed by the two adjacent liquid crystal glasses 2. For details, please refer to Figure 6 That is, each first flange 111 and second flange 112 are arranged in sequence at intervals to ensure that the flanges 11 evenly distributed along both sides of the seam are subjected to dispersed forces, and the forces of the first flange 111 and the second flange 112 are mutually constrained and balanced to prevent deformation of the edge 1 due to different forces on the flanges 11 on both sides, thereby further avoiding light leakage caused by the displacement of the edge 1.

[0057] Preferably, combined Figure 7 In order to improve the pressing effect of the flange 1 on the liquid crystal glass 2, when two adjacent spliced ​​screens share a side edge 1, in this embodiment, the first flange 111 and the second flange 112 located at the upper and lower ends of the joint can be appropriately widened to increase the contact area between the flange 11 and the liquid crystal glass 2, so that the flange 11 formed by bending the edge 1 provides a greater pressing force on the liquid crystal glass 2, relieves the bearing pressure when the two spliced ​​screens share a side edge 1, and improves the structural stability of the combined screen.

[0058] Of course, the length of the widened flange 11 can be reasonably selected according to the height of the spliced ​​screen so as not to affect the user's viewing experience. Preferably, the flange 11 in the middle part of the spliced ​​screen still maintains an extremely narrow structure to reduce the seam width and prevent visual fatigue caused by too wide a seam.

[0059] The present embodiment provides an anti-light leakage combination screen, which can be composed of at least two anti-light leakage splicing screens mentioned above. For example, the anti-light leakage combination screen can be formed by splicing two splicing screens left and right to widen the field of view and enhance the integrated presentation effect of the front of the combination screen. It is suitable for places with a large number of people and a large space.

[0060] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A light leakage proof splicing screen, characterized by: The invention comprises a liquid crystal glass (2), a diffusion plate (3), and a module profile (4) for carrying the diffusion plate (3) and arranged at the bottom thereof, wherein one end of the module profile (4) extends to the bottom of the liquid crystal glass (2) and forms a first convex corner (41), the diffusion plate (3) abuts against the first convex corner (41), and a rim (1) is further arranged on the side of the module profile (4), and the rim (1) extends to the surface of the liquid crystal glass (2) and forms a flange (11), and the liquid crystal glass (2) is pressed and fixed by the flange (11) and the first convex corner (41); the width of the flange (11) is not greater than the width of the first convex corner (41); The bottom of the module profile (4) is supported and fixed by a back plate (8), and the bottom of the module profile (4) is protruded in the direction of the edge (1) arranged on the side and forms a second convex angle (43), so that a cavity structure for accommodating a PCB board (6) is formed between the module profile (4) and the edge (1).

2. The light leakage prevention splicing screen according to claim 1, characterized in that: A first groove (42) is provided on the first convex corner (41), and a rubber strip (5) for limiting the sliding of the liquid crystal glass (2) is provided in the first groove (42).

3. The anti-light leakage splicing screen according to claim 1, characterized in that: The flange (11) comprises a first flange (111) and a second flange (112); the first flange (111) and the second flange (112) are arranged at the same end of the edge wrapping (1) and in opposite directions to fix two adjacent liquid crystal glasses (2).

4. The light leakage prevention splicing screen according to claim 3, characterized in that: The first flange (111) and the second flange (112) are staggeredly distributed along the length direction of the joint formed by two adjacent pieces of liquid crystal glass (2).

5. The light leakage prevention splicing screen according to claim 1, characterized in that: One end of the PCB board (6) is against the edge (1), and the other end is clamped in a second groove (44) formed on the second convex corner (43).

6. The light leakage prevention splicing screen according to claim 1, characterized in that: The liquid crystal glass (2) and the module profile (4) are both bonded and fixed to the edge wrapping (1) by means of a fixing glue (9).

7. The light leakage prevention splicing screen according to any one of claims 1 to 6, characterized in that: The edging (1) and the module profile (4) are both made of aluminum alloy, and the flange (11) formed by the edging (1) extending to the surface of the liquid crystal glass (2) is arranged as an arc-shaped angle transition.

8. A light leakage prevention combined screen, characterized in that: The invention comprises at least two light leakage prevention splicing screens as described in any one of claims 1 to 7.

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