Single-screen module and spliced display device

Abstract

The present disclosure provides a single screen module and a spliced display device. The single screen module comprises: a display panel comprising a plurality of splicing sides, at least one splicing side being a signal source side, and a driving signal circuit being arranged on the signal source side; and a backlight module arranged on a non-display side of the display panel. In at least one splicing side, a gap limiting structure is arranged on a splicing side surface of the backlight module, and the gap limiting structure has a preset overhanging amount beyond the edge of the display panel along the splicing direction. The gap limiting structure is configured to form an abutting structure with a corresponding part of another display module when the single screen module is spliced with the other display module, so as to limit the screen gap between the display panels of the adjacent two modules at least on the signal source side. The preset overhanging amount is equal to or greater than a target value of the screen gap.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a single-screen module and a splicing display device. Background Technology

[0002] With the development of commercial display technology, the market increasingly demands ultra-narrow bezel splicing screens. In related technologies, a single screen in a splicing display is typically positioned on the side of the signal source, meaning that COF Film (Chip On Film, flexible thin-film circuit) is laminated to the side of the display panel. However, due to long-term use and aging of the splicing screen brackets, the bezel between the screens can change, causing pressure on the signal source side of the display panel, leading to problems such as COF Film breakage and resulting in display defects. Summary of the Invention

[0003] In order to solve at least one of the technical problems in the prior art, the present disclosure provides a single-screen module and a splicing display device.

[0004] To solve the above-mentioned technical problems, this disclosure is implemented as follows:

[0005] In a first aspect, embodiments of this disclosure provide a single-screen module, including:

[0006] The display panel includes multiple splicing sides, at least one of the splicing sides being a signal source side, and a driving signal circuit is provided on the signal source side;

[0007] The backlight module is located on the non-display side of the display panel; wherein,

[0008] On at least one of the splicing sides, the splicing side of the backlight module is provided with a gap limiting structure, the gap limiting structure having a preset extension amount that extends beyond the edge of the display panel along the splicing direction;

[0009] The gap limiting structure is configured to, when the single-screen module is spliced ​​with another display module, form an abutment structure with a corresponding part of the other display module to define the inter-screen gap between the display panels of the two adjacent modules at least on the signal source side, wherein the preset protrusion amount is equal to or greater than the target value of the inter-screen gap.

[0010] For example, the gap limiting structure includes: a gasket limiting component disposed on the splicing side of the backlight module; and / or a protruding pillar limiting component disposed on the splicing side of the backlight module; the gasket limiting component and / or the protruding pillar limiting component protrude from the edge of the display panel along the splicing direction to form an abutment structure between two adjacent single-screen modules.

[0011] For example, the gasket limiting assembly includes:

[0012] At least one gasket is provided on the splicing side of the backlight module; and,

[0013] A shim adjustment mechanism connected to the at least one shim, the shim adjustment mechanism being configured to adjust the number of shims protruding relative to the edge of the display panel to adjust the preset protrusion amount.

[0014] For example, a first groove is provided on the splicing side of the backlight module, and a gasket limiting structure is provided around the first groove;

[0015] The gasket adjustment mechanism includes:

[0016] A shaft assembly, the shaft assembly extending axially along the splicing direction, the washer sleeved on the shaft assembly and rotatable about the shaft assembly between a first position and a second position; and,

[0017] An elastic preload assembly includes a shaft assembly with an axially opposite connecting end and a free end. The connecting end is connected to the splicing side of the backlight module. A stop portion is provided at the free end. A gasket is sleeved on the shaft, and the elastic preload assembly abuts against the spacer and the stop portion to provide an axial elastic preload force to the spacer.

[0018] At the first position, the gasket is located in the area where the first groove is located;

[0019] In the second position, the gasket is located in the area where the gasket limiting structure is located;

[0020] When the single-screen module is spliced ​​with the other display module, the pads located at the second position form an abutment structure between the two adjacent modules, so that the gap between the screens can be determined by adjusting the number of pads located at the second position.

[0021] For example, one of the gasket and the gasket limiting structure is a magnetic component, and the other is a magnetically attracted component, so that the gasket and the gasket limiting structure can be magnetically attracted and limited.

[0022] For example, the shaft assembly further includes: a first screw hole member disposed on the splicing side of the backlight module, the connecting end of the shaft assembly being threadedly connected to the first screw hole member, so that the extension length of the shaft assembly relative to the splicing side of the backlight module is adjustable.

[0023] For example, the backlight module includes: a back plate and a middle frame, the middle frame being located between the back plate and the display panel, the splicing side of the back plate being recessed relative to the splicing side of the middle frame; the shaft assembly being disposed on the splicing side of the back plate, and the first groove and the gasket limiting structure being disposed on the splicing side of the middle frame.

[0024] For example, the plurality of splicing sides also include non-signal source sides for splicing with the signal source side of the other display module;

[0025] The shaft assembly is located on the splicing side of the signal source side of the back plate;

[0026] On the non-signal source side, the splicing side of the back panel is provided with a clearance area for avoiding the shaft assembly. When the single-screen module and the other display module have the same structure and the single-screen module and the other display module are spliced ​​together, the free end of the shaft assembly extends into the clearance area of ​​the other display module.

[0027] For example, the plurality of splicing sides also includes a non-signal source side spliced ​​with the signal source side of the other display module;

[0028] The protruding pin limiting component includes:

[0029] A first limiting groove and a second limiting groove are located on the splicing side of the backlight module, wherein one of the first limiting groove and the second limiting groove is located on the signal source side and the other is located on the non-signal source side; and

[0030] When the single-screen module and the other display module have the same structure and are spliced ​​together, the first limiting post can abut its two axial ends against the first limiting groove and the second limiting groove of the two adjacent modules respectively, so as to limit the screen gap between the display panels of the two adjacent modules.

[0031] For example, the first end of the first limiting post has a protruding stud, and the first limiting groove has an internal thread;

[0032] Wherein, when the single-screen module and the other display module have the same structure, and the single-screen module and the other display module are spliced ​​together, the convex stud is connected to the internal thread of the first limiting groove, and the first axial end of the first limiting post abuts against the bottom surface of the first limiting groove; the second axial end of the first limiting post abuts against the bottom surface of the second limiting groove of the other display module.

[0033] For example, there are multiple grooves in both the first limiting groove and the second limiting groove, and each first limiting groove and each second limiting groove are configured in a one-to-one correspondence. The multiple first limiting grooves and / or second limiting grooves have different depths, so that the gap between the screens can be adjusted by selecting to cooperate the first limiting post with the first limiting groove and / or second limiting groove of different depths.

[0034] For example, the backlight module includes a back panel and a middle frame disposed between the back panel and the display panel; wherein, in the splicing direction, the splicing side of the middle frame protrudes relative to the splicing side of the back panel, and the first limiting groove and the second limiting groove are respectively disposed on different splicing sides of the middle frame.

[0035] For example, the plurality of splicing sides also includes a non-signal source side spliced ​​with the signal source side of the other display module;

[0036] The protruding pin limiting component includes:

[0037] The first protruding post assembly is disposed on the signal source side of the backlight module; and

[0038] The second protruding post assembly is located on the non-signal source side of the backlight module;

[0039] The first protruding post assembly and the second protruding post assembly each have an end that protrudes from the edge of the display panel along the splicing direction; when two adjacent single-screen modules are spliced, the ends of the first protruding post assembly and the second protruding post assembly abut against each other to form the abutting structure.

[0040] For example, at least one of the first protruding post assembly and the second protruding post assembly includes a first adjustable bolt, which is screwed to the splicing side of the backlight module to adjust the inter-screen gap by rotating the first adjustable bolt.

[0041] For example, the plurality of splicing sides also includes a non-signal source side spliced ​​with the signal source side of the other display module;

[0042] The protruding post limiting component includes:

[0043] The third protruding pillar assembly is disposed on the splicing side of the backlight module and located on the signal source side. The third protruding pillar assembly has an end that protrudes from the edge of the display panel along the splicing direction. When the single-screen module is spliced ​​with the other display module, the end of the third protruding pillar assembly abuts against the non-signal source side splicing side of the other display module.

[0044] For example, the third protruding post assembly includes a second adjustable bolt, which is screwed to the splicing side of the backlight module to adjust the inter-screen gap by rotating the second adjustable bolt.

[0045] For example, the backlight module includes: a back plate and a middle frame disposed between the back plate and the display panel;

[0046] In the splicing direction, the splicing side of the middle frame protrudes relative to the splicing side of the back plate;

[0047] A second screw hole is provided on the signal source side of the back panel. The connecting end of the second adjustable bolt is threaded into the second screw hole so that the gap between the screens can be adjusted by rotating the second adjustable bolt.

[0048] For example, a third limiting groove is provided on the non-signal source side splicing side of the back panel; when the single screen module is connected to the other display module, the end of the second adjustable bolt abuts against the bottom surface of the third limiting groove of the other display module.

[0049] For example, the end of the second adjustable bolt is provided with a nut portion, and the circumferential surface of the nut portion is provided with at least one groove for a tool to rotate the nut portion.

[0050] For example, the plurality of splicing sides also includes a non-signal source side spliced ​​with the signal source side of the other display module;

[0051] The protruding pin limiting component includes:

[0052] A second limiting post is provided on the splicing side of the backlight module. The second limiting post protrudes a predetermined length relative to the splicing side of the backlight module along the splicing direction, and the end of the second limiting post is provided with a connecting groove extending along the axial direction.

[0053] A third limiting post is provided on the splicing side of the backlight module, and the third limiting post protrudes relative to the splicing side of the backlight module along the splicing direction;

[0054] The second limiting post is located on one of the signal source side and the non-signal source side, and the third limiting post is located on the other of the signal source side and the non-signal source side. When the single-screen module and the other display module have the same structure and are spliced ​​together, the third limiting post is embedded in the connecting groove of the other display module to form an abutment structure between the two adjacent modules.

[0055] For example, the second limiting post is rotatably mounted on the splicing side of the backlight module, and the connecting groove is threadedly connected to the third limiting post so that the gap between the screens can be adjusted by rotating the second limiting post.

[0056] For example, the backlight module includes a back plate, and the third limiting post is an integral structure with the back plate.

[0057] Secondly, embodiments of this disclosure provide a splicing display module, including multiple display modules spliced ​​together, wherein at least one display module adopts a single-screen module as described above. Attached Figure Description

[0058] Figure 1 This is one of the structural schematic diagrams of a single-screen module in some embodiments of this disclosure;

[0059] Figure 2 This is a schematic diagram of the structure of the gasket limiting component of a single-screen module in some embodiments of this disclosure;

[0060] Figure 3 This is a schematic diagram of the structure of the gasket of a single-screen module in some embodiments of this disclosure;

[0061] Figure 4 This is a schematic diagram illustrating the switching of the gasket limiting component of a single-screen module in a first position and a second position in some embodiments of this disclosure;

[0062] Figure 5 for Figure 4 Sectional view along line A-A';

[0063] Figure 6 for Figure 4 Sectional view along line B-B';

[0064] Figure 7 This is one of the structural schematic diagrams of two single-screen modules spliced ​​together in some embodiments of this disclosure;

[0065] Figure 8 This is a schematic diagram showing the extension length of the gasket adjustment assembly in some embodiments of this disclosure;

[0066] Figure 9 This is the second schematic diagram of the structure of a single-screen module in some embodiments of this disclosure;

[0067] Figure 10 This is the second schematic diagram of the structure of two single-screen modules spliced ​​together in some embodiments of this disclosure;

[0068] Figure 11 for Figure 10 Partial sectional view from E-E';

[0069] Figure 12This is a schematic diagram of the structure of the first limiting post in some embodiments of this disclosure;

[0070] Figure 13 This is the third of several schematic diagrams showing the structure of two single-screen modules spliced ​​together in some embodiments of this disclosure;

[0071] Figure 14 This is the third of the structural schematic diagrams of a single-screen module in some embodiments of this disclosure;

[0072] Figure 15 This is the fourth of several schematic diagrams showing the structure of two single-screen modules spliced ​​together in some embodiments of this disclosure;

[0073] Figure 16 This is a schematic diagram showing the adjustment of the preset extension amount of the protruding column limiting component of a single-screen module in some embodiments of this disclosure;

[0074] Figure 17 This is the fourth schematic diagram of the structure of a single-screen module in some embodiments of this disclosure;

[0075] Figure 18 This is the fifth of several schematic diagrams illustrating the structure of two single-screen modules spliced ​​together in some embodiments of this disclosure;

[0076] Figure 19 This is the fifth of several schematic diagrams illustrating the structure of a single-screen module in some embodiments of this disclosure;

[0077] Figure 20 This is the sixth of several schematic diagrams showing the structure of two single-screen modules spliced ​​together in some embodiments of this disclosure. Detailed Implementation

[0078] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0079] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “including,” “comprising,” or “containing,” and similar terms mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms “connected,” “linked,” or similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0080] The present disclosure will now be described in more detail with reference to the accompanying drawings. In the various drawings, the same elements are indicated by similar reference numerals. For clarity, the various parts in the drawings are not drawn to scale. Furthermore, some well-known parts may not be shown in the drawings.

[0081] Many specific details of this disclosure, such as the structure, materials, dimensions, processing methods, and techniques of the components, are described below to provide a clearer understanding of the disclosure. However, as those skilled in the art will understand, this disclosure may be implemented without following these specific details.

[0082] Before providing a detailed description of the single-screen module and display device provided in the embodiments of this disclosure, the following description of the related technologies is provided:

[0083] With the development of commercial display technology, the market increasingly demands ultra-narrow bezel splicing screens. In related technologies, a single screen in a splicing display is typically positioned on the side of the signal source, meaning that COF Film (Chip On Film, flexible thin-film circuit) is laminated to the side of the display panel. However, due to long-term use and aging of the splicing screen brackets, the bezel between the screens can change, causing pressure on the signal source side of the display panel, leading to problems such as COF Film breakage and resulting in display defects.

[0084] To address the aforementioned issues, this disclosure provides a single-screen module and a splicing display module.

[0085] like Figures 1 to 19 As shown, the single-screen module 10 provided in this embodiment includes a display panel 100 and a backlight module 200 disposed on the non-display side of the display panel 100.

[0086] The display panel 100 has multiple splicing sides, at least one of which is a signal source side 100A. The signal source side 100A is provided with a drive signal circuit (e.g., COF) for providing scan drive signals to the display panel 100. The multiple splicing sides also include a non-signal source side 100B, which is not provided with a drive signal circuit.

[0087] In this embodiment, the splicing side is described with the signal source side 100A as the splicing side. The single-screen module 10 can be spliced ​​with another display module, wherein the other display module may have the same or different structure as the single-screen module 10 in this embodiment.

[0088] For example, a single-screen module 10 can be spliced ​​together with a signal source side 100A and a non-signal source side 100B of another display module. In this embodiment, taking screen A and screen B shown in the figure as examples, screen A refers to one of the single-screen modules 10, and screen B refers to another display module.

[0089] In some embodiments, such as Figure 1 As shown, the backlight module 200 may include a back plate 210, a middle frame 220, a light strip 230, a reflective film 240, and a diffuser plate 250, etc.

[0090] The backplate 210 is the main supporting part of the overall structure. It can be made of galvanized steel plate or cold-rolled steel plate, with a material thickness of 0.8~1.2mm, and can be formed by die stamping and bending. The light strip 230 is placed at the bottom of the inner cavity of the backplate 210 and is glued and fixed to the backplate 210. The light strip 230 mainly includes a light source to provide backlight for the module. The middle frame 220 can be made of materials such as extruded aluminum. The middle frame 220 can be located between the backplate 210 and the display panel 100, and is vertically inserted into the side bend of the backplate 210. It can be locked and fixed to the backplate 210 by screws 260, etc.

[0091] In some embodiments, the size of the display panel 100 in the splicing direction may be larger than the corresponding size of the backlight module 200. For example, the size of the display panel 100 in the splicing direction may be 1 mm to 1.5 mm larger than the corresponding size of the backlight module 200.

[0092] It should be noted that in this specification, the splicing direction refers to the direction in which two adjacent modules (single-screen module 10 and another display module) approach each other in the splicing state. That is, the straight line direction from one single-screen module 10 to the other display module, as shown by X in the figure, is a splicing direction.

[0093] Please see Figure 1 and Figure 7As shown, on at least one splicing side, the splicing side of the backlight module 200 is provided with a gap limiting structure 300, which has a preset extension amount extending beyond the edge of the display panel 100 along the splicing direction; the gap limiting structure 300 is configured to, when the single screen module is spliced ​​with another display module, form an abutment structure with the corresponding part of the other display module (B screen) to define the screen gap d between the display panels 100 of the two adjacent modules at least on the signal source side 100A, wherein the preset extension amount is equal to or greater than the target value of the screen gap d.

[0094] It should be noted that the inter-panel gap d is the distance between the splicing sides of the display panels of two adjacent modules along the splicing direction. The preset protrusion is the distance by which the gap limiting structure extends beyond the edge of the display panel along the splicing direction, and this preset protrusion is measured along the splicing direction.

[0095] For example, the target value of the inter-screen gap d can be 0.2mm to 0.3mm. When the single-screen module 10 is spliced ​​with another display module, the gap limiting structure 300 can form an abutment structure between the two adjacent modules to limit the aforementioned inter-screen gap d.

[0096] In some embodiments, such as Figures 1 to 8 As shown, the gap limiting structure 300 may include a spacer limiting component 310 disposed on the splicing side of the backlight module 200. The spacer limiting component 310 protrudes from the edge of the display panel 100 along the splicing direction to form an abutment structure between two adjacent modules.

[0097] For example, in combination Figure 1 and Figure 2 As shown, the gasket limiting assembly 310 includes at least one gasket 311 and a gasket adjustment mechanism 312. The gasket 311 is disposed on the splicing side of the backlight module 200. The gasket adjustment mechanism 312 is connected to at least one gasket 311. The gasket adjustment mechanism 312 is configured to adjust the number of gaskets protruding relative to the edge of the display panel 100 to adjust a preset extension amount.

[0098] For example, the spacer limiting assembly 310 may include multiple stacked spacers 311. Some spacers 311 may be pre-positioned to protrude from the edge of the display panel 100, allowing them to contact the corresponding part of another display module before the display panel 100 during splicing. This ensures priority contact of the backlight portion, avoiding issues such as squeezing, COF peeling, and bright / dark lines caused by initial contact at the display panel 100. Furthermore, even if the splicing bracket ages or sinks due to gravity after long-term use in the market, the spacers 311 continue to provide rigid support, ensuring that the gap d between the screens remains unchanged over time, thus avoiding risks such as screen breakage and bright / dark lines caused by collisions between display panels 100.

[0099] The number of shims protruding from the edge of the display panel 100 is preset, and the preset protrusion amount can be adjusted to determine the size of the inter-screen gap d. Therefore, by increasing or decreasing the number of shims 311 through the shim adjustment mechanism 312, the different needs of different customers for the inter-screen gap d can be met.

[0100] In some exemplary embodiments, such as Figures 4 to 6 As shown, a first groove 201 is provided on the splicing side of the backlight module 200, and a gasket limiting structure 313 is provided around the first groove 201.

[0101] like Figures 1 to 6 As shown, the shim adjustment mechanism 312 includes a shaft assembly 3121 and an elastic preload assembly 3122. The shaft assembly 3121 extends axially along the splicing direction. The shim 311 is sleeved on the shaft assembly 3121 and can rotate around the shaft assembly 3121 between a first position W1 and a second position W2. The shaft assembly 3121 has an axially opposite connecting end 3121a and a free end 3121b. The connecting end 3121a is connected to the splicing side of the backlight module 200. A stop portion 3121c is provided at the free end 3121b. The shim 311 is sleeved on the shaft assembly 3121, and the elastic preload assembly 3122 abuts against the shim 311 and the stop portion 3121c to provide an axial elastic preload force to the shim 311.

[0102] In the first position W1, the spacer 311 is located in the area where the first groove 201 is located; in the second position W2, the spacer 311 is located in the area where the spacer limiting structure 313 is located. When the single-screen module 10 is spliced ​​with another adjacent display module, the spacer 311 located in the second position W2 forms an abutment structure between the two adjacent single-screen modules 10, so that the gap d between the screens can be determined by adjusting the number of spacers 311 located in the second position W2.

[0103] In the above scheme, the shaft assembly 3121 has a connecting end 3121a and a free end 3121b arranged opposite each other along the axial direction. The connecting end 3121a is connected to the splicing side of the backlight module 200 to fix the shaft assembly 3121 to the backlight module 200; the free end 3121b is provided with a stop portion 3121c. A gasket 311 is sleeved on the shaft assembly 3121, and an elastic preload assembly 3122 abuts against the spacer 311 and the stop portion 3121c to provide an axial elastic preload force to the gasket 311. Thus, the gasket 311 has axial movement space on the shaft assembly 3121 and can be stably held in place by the elastic preload assembly 3122 to prevent the gasket 311 from moving or falling off.

[0104] The first position W1 is the storage position or initial storage position of the pad 311. In this position, the pad 311 is located in the area where the first groove 201 is located, for example, at the notch on the outer wall of the middle frame 220. At this time, the pad 311 does not participate in defining the gap d between two adjacent single-screen modules 10, or it is reserved as a spare pad 311 on the splicing side of the backlight module 200.

[0105] The second position W2 is the working position or splicing abutment position of the gasket 311. In this position, after the gasket 311 rotates around the shaft assembly 3121 by a preset angle α, it enters the area where the gasket limiting structure 313 is located. At this time, the gasket 311 located in the second position W2 protrudes from the edge of the display panel 100 along the splicing direction, so that the splicing side of the backlight module 200 contacts the corresponding part of the adjacent single-screen module 10 before the display panel 100, thereby forming an abutment structure between the two adjacent single-screen modules 10 to limit the screen gap d between the display panels 100.

[0106] Before factory assembly or market installation, the number of shims 311 required for abutment can be determined based on the target value of the inter-screen gap d. By adjusting the number of shims 311 located at the second position W2, the preset extension amount of the shims 311 beyond the edge of the display panel 100 along the splicing direction can be adjusted, thereby determining the actual size of the inter-screen gap d.

[0107] For example, the gap d between the target screens can be 0.2mm to 0.3mm; the thickness of the shim 311 can preferably be based on 0.1mm or 0.05mm, and different gaps d between screens can be achieved by selecting different numbers of shims 311.

[0108] In some embodiments, such as Figure 2 and Figure 3 As shown, the spacer 311 may have a through hole 3111 in the middle. The diameter of the through hole 3111 is 0.2 mm larger than the diameter of the shaft assembly 3121, so as to allow the spacer 311 to be fitted onto the shaft assembly 3121 and rotate around the axis of the shaft assembly 3121 by a certain angle. For example, the thickness of the spacer 311 is based on 0.1 mm or 0.05 mm, and an appropriate number of spacers 311 are pre-set with reference to the target value of the inter-screen gap d. For example, the number of spacers 311 can be 10 to 20.

[0109] In some embodiments, the elastic preload assembly 3122 may be a miniature spring or a lightweight spring. Exemplarily, the spring constant k may be set between 50 and 500 N / m, for example, 300 N / m. The spring is positioned between the shaft assembly 3121 and the washer 311 to preload the washer 311, maintaining it in a stable preloaded state in the axial direction and preventing it from moving or falling off.

[0110] In some exemplary embodiments, one of the gasket 311 and the gasket limiting structure 313 is a magnetic member and the other is a magnetically attracted member, so that the gasket 311 and the gasket limiting structure 313 can be magnetically attracted and limited.

[0111] For example, the gasket 311 may be a magnetic component, and the gasket limiting structure 313 may be a magnetically attracted component. The gasket 311 may be made of ferritic stainless steel (such as 430 stainless steel) or martensitic stainless steel (such as 410 / 420 stainless steel), and has ferromagnetism, so it can be attracted by a magnet and can also be adsorbed onto the surface of a ferromagnetic substrate under the action of a magnetic field. The gasket limiting structure 313 may include an iron substrate riveted to the side of the middle frame 220 and / or an iron substrate 3130 riveted to the outer side of the outer wall of the middle frame 220, both of which are ferromagnetic components and can form a stable magnetic attraction with the magnetic gasket 311.

[0112] In one exemplary embodiment, the splicing side of the back panel 210 is recessed relative to the splicing side of the middle frame 220; the shaft assembly 3121 is disposed on the splicing side of the back panel 210, and the first groove 201 and the gasket limiting structure 313 are both disposed on the splicing side of the middle frame 220. That is, the first groove 201 can be a notch on the outer wall of the middle frame 220, which can expose part of the back panel 210.

[0113] exist Figure 4 In one assembled configuration shown, the magnetic pad 311 can be initially placed in the notch (i.e., the first groove 201) on the outer wall of the middle frame 220 and can be magnetically attracted to the side wall of the back plate 210. At this time, the magnetic pad 311 is in the first position W1, held together by the magnetic force and the elastic pre-tightening component 3122, and does not participate in defining the splicing gap. Figure 4 In another exemplary assembly state shown, a certain number of magnetic pads 311, after being contracted by the spring, can be switched from the first position W1 to the second position W2 by rotating a preset angle α on the shaft assembly 3121 (e.g., a bolt can be used as the shaft assembly 3121), and are then magnetically fixed again to the iron substrate or iron pads 311 on the side of the middle frame 220. At this time, the magnetic pads 311 are in the second position W2, protruding from the edge of the display panel 100 along the splicing direction, for forming an abutment structure with the adjacent single-screen module 10 during splicing.

[0114] It is understood that, in another feasible implementation, the relationship between the magnetic components and the magnetically attracted components in the gasket 311 and the gasket limiting structure 313 can be interchanged. For example, the gasket limiting structure 313 can be a permanent magnet component, while the gasket 311 is a ferromagnetic magnetically attracted component (such as a soft iron sheet, silicon steel sheet, etc.), and a magnetic attraction and limiting relationship can also be formed between the two.

[0115] It should be noted that the above is only an example. In other embodiments, the matching and limiting method between the gasket 311 and the gasket limiting structure 313 is not limited to this. For example, the two can also lock the gasket by other means such as snap-fit, which is not limited.

[0116] Furthermore, it should be noted that the magnetic attraction force can be adjusted by the following parameters: the material of the magnetic pad 311, the thickness of the pad 311, the area of ​​the pad 311, and the distance between the pad 311 and the pad limiting structure 313. Therefore, a suitable magnetic attraction force can be designed according to the actual application scenario and the number of pads 311 to ensure that the pad 311 remains stable in the second position W2 for a long period of time, without falling off or shifting.

[0117] It should also be noted that, since the first groove 201 is a notch structure on the middle frame, it exposes part of the side wall of the back panel 210. When the gasket 311 is in the first position W1, it can be magnetically attracted to the side wall of the back panel 210, preventing it from detaching or falling off during production line transportation and ensuring consistent factory condition. In the second position W2, the gasket 311 can be magnetically attracted to the iron substrate 3130, maintaining its position stably after splicing and preventing displacement or detachment due to vibration or gravity. Thus, the gasket 311 is magnetically held in both positions, preventing accidental sliding between the two positions and fundamentally ensuring that the splicing gap remains unchanged over the long term.

[0118] In the above solution, the gasket 311 and the gasket limiting structure 313 are positioned by magnetic attraction, eliminating the need for additional fasteners (such as clips, rivets) or adhesive structures between the gasket 311 and the gasket limiting structure 313. After the gasket 311 rotates around the shaft assembly 3121 to change position, it can be automatically locked onto the gasket limiting structure 313 by magnetic attraction, without the need for secondary tightening or locking. This simplifies the assembly process, reduces the number of parts and assembly steps, and allows for manual removal or repositioning of the gaskets 311 from the iron base plate during later maintenance or adjustment without the need for special tools. This simple operation reduces assembly time on the production line.

[0119] In addition, by applying an axial elastic preload to the gasket 311 through the elastic preload assembly 3122, the gasket 311 can be prevented from falling off along the axial direction of the shaft assembly 3121. The magnetic attraction prevents the gasket 311 from falling off radially on the shaft or rotating back into position. The combination of the two holding forces makes the stability of the gasket 311 in the second position W2 significantly higher than that of a single holding method. Even if the spring experiences slight fatigue due to long-term operation and the preload decreases, the magnetic attraction can still serve as an auxiliary holding force, extending the effective life of the structure.

[0120] Furthermore, in some exemplary embodiments, such as Figure 1As shown, the shaft assembly 3121 further includes a first screw hole component 3123 disposed on the splicing side of the backlight module 200, and the connecting end 3121a of the shaft assembly 3121 is threaded to the first screw hole component 3123 so that the extension length of the shaft assembly 3121 relative to the splicing side of the backlight module 200 is adjustable.

[0121] In the above scheme, the first screw hole component 3123 can be a columnar threaded fitting component provided on the splicing side of the backlight module 200, which has an internal threaded hole for receiving the connecting end 3121a of the shaft assembly 3121 (e.g., the threaded end of a bolt) to be screwed in and locked.

[0122] For example, the first screw hole component 3123 is a stud structure extending axially along the splicing direction. One end of it is riveted or welded to the splicing side of the backlight module 200 (e.g., the bent side of the back plate 210), and the other end protrudes from the splicing side surface of the backlight module 200 along the splicing direction. The stud structure of the first screw hole component 3123 can be made of high-strength steel to ensure that it has sufficient tensile and torsional strength and does not deform or disengage when subjected to the axial preload of the gasket 311 and the elastic preload assembly 3122.

[0123] For example, such as Figure 1 As shown, a bending structure 211 may be provided on the side wall of the back plate 210. This bending structure 211 causes the side wall of the back plate 210 to form a stepped first side plate portion 212 and a second side plate portion 213. The first side plate portion 212 protrudes outward relative to the second side plate portion 213. A first screw hole member 3123 may be provided on the second side plate portion 213. The exposed area of ​​the first groove 201 may be located on the first side plate portion 212, and the end of the first screw hole member 3123 may be flush with the first side plate portion 212 of the back plate 210. The threaded end of the shaft assembly 3121 (e.g., a bolt) is screwed into the internal threaded hole of the first screw hole member 3123, and the shaft assembly 3121 is locked and fixed to the first screw hole member 3123 by a threaded connection. After the locking is completed, the free end 3121b of the shaft assembly 3121 (i.e. the end where the gasket 311 and the elastic pre-tightening assembly 3122 are located) protrudes from the splicing side surface of the backlight module 200 along the splicing direction.

[0124] Since the shaft assembly 3121 is threadedly attached to the first screw hole assembly 3123, its extension length relative to the splicing side of the backlight module 200 can be adjusted in the following ways:

[0125] First, the shaft assembly 3121 of different lengths can be replaced. For example, when the target screen gap d is 0.2mm, the shaft assembly 3121 of the corresponding length is selected; when the target screen gap d is 0.3mm, a slightly longer shaft assembly 3121 is selected, so that the sum of the protrusion of the stop portion 3121c of the free end 3121b of the shaft assembly 3121 relative to the splicing side of the backlight module 200 and the total thickness of the pad 311 is equal to the target value of the screen gap d.

[0126] Secondly, adjustment is achieved by rotating the shaft assembly 3121. During production line assembly or market installation, the depth to which the shaft assembly 3121 is screwed into the first screw hole component 3123 is changed by rotating the shaft assembly 3121, thereby finely adjusting the protruding position of the free end 3121b of the shaft assembly 3121 and achieving precise adjustment of the preset protrusion amount.

[0127] Third, the number of shims 311 can be adjusted. With the extension length of the shaft assembly 3121 fixed, the total thickness of the shims 311 can be changed by increasing or decreasing the number of shims 311 fitted on the shaft assembly 3121, thereby achieving the adjustment of different screen gaps d without changing the extension length of the shaft assembly 3121.

[0128] For example, such as Figure 8 As shown, the shaft assembly 3121 is located on the splicing side of the signal source side 100A of the back plate 210; on the non-signal source side 100B, the splicing side of the back plate 210 is provided with a clearance area C for avoiding the shaft assembly 3121. When the single-screen module 10 is spliced ​​with another adjacent display module, the free end 3121b of the shaft assembly 3121 extends into the clearance area C of the other adjacent display module.

[0129] In the above scheme, to ensure that the spacer 311 contacts first during the splicing of single-screen modules 10, rather than the free end 3121b of the non-axis assembly 3121 contacting first, the extended length of the axis assembly 3121 after locking must be less than the avoidance zone C when the signal source side 100A and non-signal source side 100B of the two adjacent spliced ​​single-screen modules 10 contact. That is, there is a gap GAP between the stop part 3121c of the axis assembly 3121 and the back plate or middle frame of the adjacent single-screen module 10, and this gap GAP > 0. Therefore, only the end face of the spacer 311, rather than the axis assembly 3121 itself, actually participates in the contact during splicing, ensuring the flatness of the contact surface and the accuracy of the gap definition.

[0130] The adjustable extension length of the shaft assembly 3121 allows it to accommodate adjustments in the number of shims 311, covering gaps d between different target screens (e.g., 0.2mm to 0.3mm), meeting market demands for adapting different seam specifications to the same product platform. Simultaneously, the extension length of the shaft assembly 3121 after locking is limited within the clearance zone C, ensuring that only the end face of the shim 311 actually engages in contact during splicing, preventing the shaft assembly 3121 itself from contacting adjacent screens before the shims 311, thus guaranteeing the accuracy and long-term stability of the inter-screen gap d.

[0131] Furthermore, in some other exemplary embodiments, the gap defining structure 300 may include a protruding pillar limiting component disposed on the splicing side of the backlight module 200. The protruding pillar limiting component protrudes from the edge of the display panel 100 along the splicing direction to form an abutment structure between two adjacent single-screen modules 10.

[0132] For example, such as Figures 9 to 12 As shown, in some embodiments, the protruding post limiting assembly includes: a first limiting groove 321 and a second limiting groove 322 located on the splicing side of the backlight module 200, and a first limiting post 323, wherein one of the first limiting groove 321 and the second limiting groove 322 is located on the signal source side 100A, and the other is located on the non-signal source side 100B; when the single-screen module 10 (screen A) is spliced ​​with another adjacent display module (screen B), the two axial ends of the first limiting post 323 can respectively abut against the first limiting groove 321 and the second limiting groove 322 of the two adjacent single-screen modules 10 to limit the screen gap d between the display panels 100 of the two adjacent single-screen modules 10.

[0133] For example, the first axial end of the first limiting post 323 has a protruding stud 3231, and the first limiting groove 321 has an internal thread; when the single screen module 10 (screen A) and the adjacent other display module (screen B) have the same structure, and the single screen module 10 (screen A) and the adjacent other display module (screen B) are spliced, the protruding stud 3231 is connected to the internal thread of the first limiting groove 321, and the first axial end of the first limiting post 323 abuts against the bottom surface of the first limiting groove 321; the second axial end of the first limiting post 323 abuts against the bottom surface of the second limiting groove 322 of the other display module.

[0134] In some embodiments, such as Figure 10 and Figure 12 As shown, the axial second end of the first limiting post 323 is constructed as a plane 3232; in other embodiments, such as Figure 12 As shown, the first limiting post 323 has a protrusion 3233 on the second end face of the axial direction, and correspondingly, the bottom surface of the second limiting groove 322 has a slot 3221, and the protrusion 3233 can abut against the slot 3221.

[0135] In the above scheme, the first limiting groove 321 can be a groove-type threaded engagement structure disposed on the splicing side of the backlight module 200, and its interior has an internal thread extending along the splicing direction. For example, the first limiting groove 321 is disposed at the interval position of the drive signal circuit (COF Film) on the side of the middle frame 220 on the signal source side 100A, and is formed on the outer wall of the middle frame 220. The second limiting groove 322 is a groove-type engagement structure disposed on the splicing side of the backlight module 200, and its interior may not have an internal thread. For example, the second limiting groove 322 is disposed at the corresponding position on the side of the middle frame 220 on the non-signal source side 100B, and is formed on the outer wall of the middle frame 220.

[0136] The first limiting post 323 is a limiting fastener that bridges two adjacent single-screen modules 10. For example, the first limiting post 323 is made of high-strength steel, with a threaded structure (external thread) at its first axial end and a non-threaded structure at its second axial end. The length of the first limiting post 323 is set according to the gap d between the target screens.

[0137] During actual assembly, the first axial end (the threaded end) of the first limiting post 323 is simply screwed into the second limiting groove 322 on the side of the non-signal source side 100B frame 220 to achieve locking and fixation, and abuts against the bottom surface of the second limiting groove 322; the second axial end of the first limiting post 323 is then inserted into the first limiting groove 321 on the side of the signal source side 100A frame 220 of the adjacent display module. At this time, the first limiting post 323 spans between the two adjacent single-screen modules 10, and its length defines the gap between the two screens.

[0138] In some exemplary embodiments, there are multiple grooves in both the first limiting groove 321 and the second limiting groove 322. Each first limiting groove 321 is correspondingly set with each second limiting groove 322, and the multiple first limiting grooves 321 and / or second limiting grooves 322 have different depths. By selecting to mate the first limiting post 323 with the first limiting grooves 321 and / or second limiting grooves 322 of different depths, the gap d between the screens can be adjusted.

[0139] In the above scheme, the first limiting groove 321 and the second limiting groove 322 can be designed with multiple depths. For example, on the side of the middle frame 220 of the signal source side 100A and the non-signal source side 100B, as... Figure 11As shown, multiple first limiting grooves 321 and second limiting grooves 322 of different depths can be sequentially arranged along the edge extension direction of the display panel 100. Each first limiting groove 321 and each second limiting groove 322 are arranged in a one-to-one correspondence, and the depth difference at different positions is typically 0.05mm. Therefore, by selecting to match the first limiting post 323 with the first limiting groove 321 and / or the second limiting groove 322 of different depths, the target value of the inter-screen gap d can be adjusted to meet the differentiated needs of different customers for the splicing seam width.

[0140] In addition, it should be noted that in the above solution, compared with the solution using the gasket limiting component 310, the first limiting post 323 is a rigid structural component. Once locked, it forms a rigid spacing constraint between the two screens, does not rely on the long-term stability of elastic elements, and maintains higher precision in the gap over a long period of time.

[0141] Furthermore, the two ends of the first limiting post 323 respectively engage with the first limiting groove 321 and the second limiting groove 322, forming an asymmetrical engagement method where one end is threaded and the other end is inserted and abutted. The first limiting post 323 achieves detachable locking by being screwed into the first limiting groove 321, making disassembly and assembly convenient. It can be quickly disassembled during screen repair or replacement without destructive operations. The second end of the first limiting post 323 has a planar structure, forming a surface contact abutment with the second limiting groove 322. This results in a large contact area and uniform pressure distribution, avoiding localized stress concentration caused by point contact. It eliminates the need for both ends to be threaded, reducing the precision requirements of one end and the risk of long-term thread wear.

[0142] Furthermore, it should be noted that the same product platform can preset multiple screen gap specifications (such as 0.20mm, 0.25mm, and 0.30mm). By selecting different limit groove depth settings, different screen gap values ​​(d) can be achieved without replacing the first limit post 323. During production line assembly, the corresponding limit groove setting is selected for locking according to the target screen gap (d), making the operation simple. If fine-tuning of the gap is required at the market end (such as from 0.2mm to 0.25mm), the first limit post 323 can simply be screwed out from one setting and into the adjacent setting, without the need for additional tools or parts. Compared to the shim 311 quantity adjustment scheme, the multi-level limit groove depth design does not require increasing or decreasing the number of parts, resulting in fewer assembly steps.

[0143] Furthermore, in some exemplary embodiments, such as Figure 9 As shown, in the splicing direction, the splicing side of the middle frame 220 protrudes relative to the splicing side of the back panel 210, and the first limiting groove 321 and the second limiting groove 322 are respectively provided on different splicing sides of the middle frame 220.

[0144] For example, the first limiting groove 321 is provided on the signal source side 100A splicing side of the middle frame 220, and the second limiting groove 322 is provided on the non-signal source side 100B splicing side of the middle frame 220. Or conversely, the second limiting groove 322 is provided on the signal source side 100A splicing side of the middle frame 220, and the first limiting groove 321 is provided on the non-signal source side 100B splicing side of the middle frame 220.

[0145] In the above scheme, in the splicing direction, the size of the middle frame 220 is larger than the size of the back panel 210. The first limiting groove 321 and the second limiting groove 322 are located on different splicing sides of the middle frame 220. When two adjacent single-screen modules 10 are spliced, the signal source side 100A of one single-screen module 10 (screen A) is spliced ​​with the non-signal source side 100B of another single-screen module 10 (screen B). The positions of the first limiting groove 321 and the second limiting groove 322 of the two adjacent single-screen modules 10 correspond. The first limiting post 323 is screwed into the first limiting groove 321 by thread and abuts against the second limiting groove 322.

[0146] By placing the first limiting groove 321 and the second limiting groove 322 on the middle frame 220 instead of the back plate 210, the impact on the stamping process of the back plate 210 can be reduced. The processing of the limiting groove on the middle frame 220 does not affect the overall structural rigidity and bending accuracy of the back plate 210. The back plate 210 still maintains a simple bending support function. At the same time, when the first limiting post 323 cooperates with the first limiting groove 321 and the second limiting groove 322, it does not intrude into the inner cavity space of the back plate 210 and does not interfere with the backlight components such as the lamp strip 230 in the inner cavity of the back plate 210.

[0147] Furthermore, the mid-frame 220 is closer to the side of the display panel 100 than the back plate 210. A limiting groove is machined with the side of the mid-frame 220 as a reference, and its depth directly corresponds to the relative position of the edge of the display panel 100. After the first limiting post 323 cooperates with the limiting groove, the gap between its contact surface and the edge of the display panel 100 is more easily and accurately calculated. It is understood that in other embodiments, the first limiting groove 321 and the second limiting groove 322 can also be provided on the back plate 210.

[0148] In other exemplary embodiments, such as Figure 14 and Figure 15As shown, the protruding pillar limiting assembly includes: a first protruding pillar assembly 324 disposed on the signal source side 100A of the backlight module 200; and a second protruding pillar assembly 325 disposed on the non-signal source side 100B of the backlight module 200; wherein, the first protruding pillar assembly 324 and the second protruding pillar assembly 325 each have an end c protruding from the edge of the display panel 100 along the splicing direction; when the single-screen module 10 and another display module have the same structure and are spliced ​​together, the second protruding pillar assembly 325 of the non-signal source side 100B of the single-screen module 10 (screen A) and the first protruding pillar assembly 324 of the signal source side 100A of the other display module (screen B) abut against each other after splicing, forming an abutment structure. For example, the ends of the first protruding pillar assembly 324 and the second protruding pillar assembly 325 protrude from the edge of the display panel 100 by about 0.1 mm, so that after the two adjacent screens are spliced, the gap d between the display panels 100 is about 0.2 mm.

[0149] For example, at least one of the first protruding post assembly 324 and the second protruding post assembly 325 includes a first adjustable bolt 3240, which is screwed to the splicing side of the backlight module 200 to adjust the screen gap d by rotating the first adjustable bolt 3240.

[0150] For example, the first adjustable bolt 3240 can be a screw-type fastener extending along the splicing direction, with an external thread at one end of its axial direction for screwing into the corresponding threaded hole on the splicing side of the backlight module 200; the other end is provided with a bolt cap 3241, and the end face of the bolt cap 3241 protrudes from the edge of the display panel 100 along the splicing direction, forming the end abutment surface of the protrusion limiting component.

[0151] Specifically, such as Figure 14 and Figure 15 As shown, the signal source side 100A of the backlight module 200 (e.g., the bent side of the back panel 210 or the side of the middle frame 220) is provided with threaded holes. The external thread end of the first adjustable bolt 3240 is screwed into the threaded holes to achieve screw-on fixation. After locking, the bolt head of the first adjustable bolt 3240 protrudes from the edge of the display panel 100 along the splicing direction, forming an end abutment surface protruding from the edge of the display panel 100 along the splicing direction on the signal source side 100A. The non-signal source side 100B of the backlight module 200 is also provided with threaded holes. The first adjustable bolt 3240 in the second protruding post assembly 325 is screwed onto the non-signal source side 100B in the same manner, and its bolt head also protrudes from the edge of the display panel 100 along the splicing direction, forming an end abutment surface protruding from the edge of the display panel 100 along the splicing direction on the non-signal source side 100B.

[0152] It should be noted that, as Figure 16As shown, before splicing, the bolt head of the first adjustable bolt 3240 can be pre-adjusted to exceed a preset distance from the display panel 100 using the auxiliary fixture 20. For example, the auxiliary fixture 20 can be an L-shaped fixture, which includes a horizontal support 21 and a vertical support 22. The horizontal support 21 can be arranged parallel to the display panel 100. The vertical support 22 has a reference surface 221 for contacting the edge of the display panel 100 and an operating surface 222 opposite to the reference surface 221. The vertical support can be provided with a through hole 223 penetrating the reference surface 221 and the operating surface 222. The vertical support 22 also has a reference groove 224 on the reference surface 221 corresponding to the through hole 23. The depth of the bottom of the reference groove 224 relative to the reference surface 221 can limit the protrusion amount of the first adjustable bolt 3240.

[0153] During operation, the horizontal support 21 can be arranged parallel to the display panel 100, and the reference surface 221 contacts and abuts against the edge of the display panel 100. Using a screwdriver or other tools, the first adjustable bolt 3240 can be loosened or tightened through the through hole 223 until the bolt cap 3241 abuts the bottom of the reference groove 224 on the longitudinal support 22 of the auxiliary fixture 20. In this way, the distance of the bolt cap 3241 beyond the display panel 100 can be accurately determined. Therefore, during actual splicing and assembly, only the contact between the bolt caps 3241 on both sides is needed to form a limited gap, eliminating the need for on-site adjustment.

[0154] It is understandable that the first adjustable bolt 3240 can also be adjusted during the splicing and installation at the market end. For example, when the market customer requests that the inter-screen gap d be adjusted from the factory preset value (such as 0.2mm) to another value (such as 0.3mm), the target value of the inter-screen gap d can be adjusted by rotating the first adjustable bolt 3240 to change the amount of protrusion of its bolt head relative to the edge of the display panel 100.

[0155] Furthermore, to ensure that the first adjustable bolt 3240 contacts the end of the protruding limiting component of the other screen first during splicing, rather than the side of the bolt cap 3241 or the backlight module 200 body first, the extension length of the first adjustable bolt 3240 after tightening (i.e., the distance of the bolt cap end face beyond the edge of the display panel 100) needs to precisely match the target value of the inter-screen gap d. For example, this excess distance can be 0.05mm to 0.15mm, which, in conjunction with the target value of the inter-screen gap d (generally 0.2mm to 0.3mm), ensures that the bolt cap end face contacts the adjacent screen before the display panel 100 during splicing.

[0156] Furthermore, the first adjustable bolt 3240 can be made of high-strength steel to ensure sufficient tensile and torsional strength, preventing bending or breakage under splicing force. Threaded holes can be located on the bent side of the back plate 210 or the side of the middle frame 220, engaging with the threads of the first adjustable bolt 3240 for detachable locking. It should be noted that while the first and second protruding post assemblies 324 and 325 are implemented using adjustable bolts in the above scheme, this is not a limitation.

[0157] In other exemplary embodiments, such as Figure 17 and Figure 18 As shown, the protruding pillar limiting component includes: a third protruding pillar component 329, which is disposed on the splicing side of the backlight module 200 and located on the signal source side 100A. The third protruding pillar component 329 has an end that protrudes from the edge of the display panel 100 along the splicing direction. When two adjacent single-screen modules 10 are spliced, the end of the third protruding pillar component 329 abuts against the splicing side of the other display module on the non-signal source side 100B.

[0158] Specifically, the third protruding pillar assembly 329 can be a protruding structural member that is only provided on the splicing side of the signal source side 100A of the single-screen module 10, and its end (abutment surface) along the splicing direction extends beyond the edge of the display panel 100 by a predetermined amount. When two adjacent single-screen modules 10 are spliced, the end of the third protruding pillar assembly 329 of the signal source side 100A of one single-screen module 10 directly abuts against the splicing side (i.e., the side of the middle frame 220 or the side of the back panel 210) of the other non-signal source side 100B of the other screen, thereby limiting the inter-screen gap d between the two display panels 100.

[0159] For example, the third protruding post assembly 329 includes a second adjustable bolt 3291, which is screwed to the splicing side of the backlight module 200 to adjust the screen gap d by rotating the second adjustable bolt 3291.

[0160] Specifically, the second adjustable bolt 3291 is a screw-type fastener extending along the splicing direction, having a connecting end 3121a and an end that are arranged opposite each other along the axial direction. A second screw hole component 3292 (e.g., a threaded hole or stud structure) is provided on the signal source side 100A of the backplate 210 during splicing. The connecting end 3121a of the second adjustable bolt 3291 can be threaded into the second screw hole component 3292 to achieve screw-locking. By rotating the second adjustable bolt 3291, the inter-screen gap d can be adjusted. The end of the second adjustable bolt 3291 can be a flat circular or square end face, protruding from the edge of the display panel 100 along the splicing direction, forming the end abutment surface of the third protruding post assembly 329.

[0161] For example, such as Figure 17 and Figure 18As shown, the second adjustable bolt 3291 has at least one first slot 3290 circumferentially arranged in the middle of its shaft. The first slot 3290 is used for a tool to rotate the second adjustable bolt 3291. For example, the second adjustable bolt 3291 may have multiple first slots 3290 distributed at equal angles circumferentially in the middle of its shaft. The first slot 3290 is a shallow groove or recess extending axially, used for a tool (such as a screwdriver or a special wrench) to be inserted to rotate the second adjustable bolt 3291. Exemplarily, the number of first slots 3290 is 2 to 4, and the circumferential angle between adjacent first slots 3290 is 90° to 180°. However, this is not a limitation.

[0162] In the above scheme, during the splicing operation, the operator can first pre-lock the connecting end 3121a of the second adjustable bolt 3291 into the second screw hole component 3292 on the splicing side of the backplate 210 of the signal source side 100A of this screen, so that the end of the second adjustable bolt 3291 protrudes from the edge of the display panel 100 along the splicing direction. After the pre-locking is completed, the operator contacts the end of the second adjustable bolt 3291 at the corresponding position of the splicing side of the non-signal source side 100B of the other screen, and then rotates the second adjustable bolt 3291 through the slot position to change the protrusion distance of the end relative to the splicing side of the backlight module 200 until the target screen gap d is reached. Thus, the end of the second adjustable bolt 3291 abuts against the splicing side of the non-signal source side 100B of the other screen, limiting the screen gap d between the two display panels 100.

[0163] It should be noted that the axial depth and width of the first slot 3290 can be designed so that the second adjustable bolt 3291 has a sense of position during rotation adjustment. That is, every time the first slot 3290 is rotated by an angle, the protrusion distance of the bolt changes by a fixed increment (such as 0.05mm). The operator can confirm the current adjustment position by touch or sight, so as to achieve fine and repeatable gap adjustment.

[0164] In addition, the second adjustable bolt 3291 can be made of high-strength steel to ensure that it has sufficient tensile strength and the rod has sufficient torsional strength.

[0165] Furthermore, in some exemplary embodiments, such as Figure 17 and Figure 18 As shown, a third limiting groove 326 is provided on the non-signal source side 100B splicing side of the back panel 210; when two adjacent single-screen modules 10 are spliced, the end of the second adjustable bolt 3291 abuts against the bottom surface of the third limiting groove 326 of the other display module.

[0166] For example, the third limiting groove 326 is a groove-shaped structure disposed on the non-signal source side 100B splicing side of the backplate 210 in the backlight module 200, which has a preset groove depth along the splicing direction and has a bottom surface inside the groove. The third limiting groove 326 can be formed in one step by the stamping process of the backplate 210, and is formed by stamping on the bent side of the non-signal source side 100B of the backplate 210.

[0167] The depth of the third limiting groove 326 is designed to correspond to the thickness of the end of the second adjustable bolt 3291 (thickness along the splicing direction). When the end of the second adjustable bolt 3291 abuts against the bottom surface of the third limiting groove 326, the end of the second adjustable bolt 3291 can fit exactly against the bottom surface of the third limiting groove 326. The bolt end and the bottom surface of the groove are in surface contact, with a large contact area and uniform pressure distribution.

[0168] In some embodiments, the third limiting groove 326 can be designed with multiple groove depths. For example, on the non-signal source side 100B of the backplate 210, multiple third limiting grooves 326 with different groove depths are sequentially arranged along the splicing direction, with the groove depth difference of each third limiting groove 326 increasing progressively in increments of 0.05mm as a typical tolerance. Thus, by selecting the flat end of the second adjustable bolt 3291 to engage with the third limiting grooves 326 of different depths, the target value of the inter-screen gap d can be adjusted to accommodate the differentiated needs of different customers for splicing seam width.

[0169] For example, the cross-sectional shape of the third limiting groove 326 can be rectangular, trapezoidal, or U-shaped. A rounded corner transition is provided between the groove wall and the bottom surface to avoid stress concentration and facilitate stamping.

[0170] In addition, the width of the third limiting groove 326 (the dimension perpendicular to the splicing direction) can be slightly larger than the diameter of the end of the second adjustable bolt 3291, so that the end of the second adjustable bolt 3291 can have a small amount of movement in the groove perpendicular to the splicing direction to compensate for assembly deviations.

[0171] Furthermore, in some other exemplary embodiments, such as Figure 19 and Figure 20As shown, the protruding post limiting assembly includes: a second limiting post 327 disposed on the splicing side of the backlight module 200, the second limiting post 327 protruding a predetermined length relative to the splicing side of the backlight module 200 along the splicing direction, and the end of the second limiting post 327 being provided with a connecting groove 3271 extending axially; and a third limiting post 328 disposed on the splicing side of the backlight module 200, the third limiting post 328 protruding relative to the splicing side of the backlight module 200 along the splicing direction; wherein, the second limiting post 327 is disposed on one of the signal source side 100A and the non-signal source side 100B, and the third limiting post 328 is disposed on the other of the signal source side 100A and the non-signal source side 100B, and when the single-screen module 10 is spliced ​​with another adjacent display module, the third limiting post 328 is embedded in the connecting groove 3271 of the other display module to form an abutment structure between the two adjacent single-screen modules 10.

[0172] Specifically, the second limiting post 327 is a columnar structural component extending along the splicing direction, and its specific implementation can be, for example, a riveted protrusion or a stud. The second limiting post 327 protrudes a predetermined length relative to the splicing side of the backlight module 200 (the bent side of the back panel 210 or the side of the middle frame 220) along the splicing direction. This predetermined length is greater than the distance from the edge of the display panel 100 to the splicing side of the backlight module 200 (i.e., the predetermined protrusion amount), so that the end of the second limiting post 327 contacts the adjacent single-screen module 10 before the edge of the display panel 100.

[0173] The end of the second limiting post 327 may be provided with a connecting groove 3271 extending axially. The connecting groove 3271 is a groove or through-hole structure opened along the axial direction (i.e., the splicing direction) of the second limiting post 327, with its opening facing the splicing direction (i.e., facing the adjacent screen), and having an axially extending receiving space inside the groove. For example, the cross-sectional shape of the connecting groove may be rectangular, U-shaped, or circular, and its width (the dimension perpendicular to the axial direction) is slightly larger than the outer diameter of the third limiting post 328, so that the third limiting post 328 can be smoothly inserted and has a certain radial movement allowance to compensate for assembly deviations.

[0174] The second limiting post 327 and the third limiting post 328 are respectively disposed on different splicing sides of the same single-screen module 10. For example, the second limiting post 327 (with a connecting groove 3271) is disposed on the splicing side of the signal source side 100A, and the third limiting post 328 (without a connecting groove) is disposed on the splicing side of the non-signal source side 100B; or conversely, the second limiting post 327 is disposed on the non-signal source side 100B, and the third limiting post 328 is disposed on the signal source side 100A.

[0175] The second limiting post 327 is rotatably mounted on the splicing side of the backlight module 200. The connecting groove is connected to the third limiting post 328 by a thread, so that the gap d between the screens can be adjusted by rotating the second limiting post 327.

[0176] For example, on the signal source side 100A, a second limiting post 327 is provided on the side of the back plate 210. The second limiting post 327 is a stud structure, and its end connecting groove 3271 is an internal thread structure. At the corresponding position on the non-signal source side 100B, a protruding post (third limiting post 328) is provided on the side of the back plate 210, and an external thread structure is provided on the third limiting post 328. During actual splicing and assembly in the market, the connecting groove 3271 of the second limiting post 327 on the signal source side 100A is first brought into contact with the third limiting post 328 on the non-signal source side 100B of the other screen. The locking depth between the second limiting post 327 and the third limiting post 328 is adjusted by rotation to adjust the gap d between the screens.

[0177] In some embodiments, such as Figure 20 As shown, the third limiting post 328 and the back plate 210 are an integral structure.

[0178] Specifically, the third limiting post 328 and the back plate 210 are the same part. The third limiting post 328 can be integrally formed with the back plate 210 through a stamping process. That is, a corresponding protruding cavity is set in the stamping die of the back plate 210, and the third limiting post 328 is formed by directly rolling and protruding on the non-signal source side 100B splicing side of the back plate 210 during the stamping process. Of course, it can be understood that the third limiting post 328 can also be another independent part set on the back plate 210.

[0179] In addition, for example, Figure 20 As shown, at least one second slot 3272 is circumferentially provided in the middle of the rod of the second limiting post 327. The second slot 3272 is used for tools to rotate the second limiting post 327. For example, the middle of the rod of the second limiting post 327 may be provided with multiple second slots 3272 distributed at equal angles along the circumference. The second slot 3272 is a shallow groove or recess extending along the axial direction, used for tools (such as screwdrivers, special wrenches) to be inserted to rotate the second limiting post 327. Exemplarily, the number of second slots 3272 is 2 to 4, and the circumferential angle between adjacent second slots 3272 is 90° to 180°. However, this is not a limitation.

[0180] In the above scheme, when performing splicing operations, the operator can first movably install the second limiting post 327 onto the splicing side of the backplate 210 of the signal source side 100A of this screen, so that the second limiting post 327 protrudes from the edge of the display panel 100 along the splicing direction; then, the operator aligns the third limiting post 328 of the splicing side of the non-signal source side 100B of the other screen with the connecting groove 3271 of the second limiting post 327, and uses a tool to rotate the second limiting post 327 through the second slot 3272 to change the protrusion distance of the end of the second limiting post 327 relative to the splicing side of the backlight module 200 until the gap d between the target screens is reached.

[0181] Furthermore, this disclosure also provides a splicing display module, which includes multiple display modules spliced ​​together, wherein at least one display module adopts the single-screen module 10 of this disclosure. Obviously, the splicing display device of this disclosure also has the beneficial effects brought by the single-screen module 10 provided in this disclosure, and will not be elaborated further here.

[0182] It should be noted that the single-screen module 10 of this disclosure embodiment is not limited to a specific type of display panel 100, and any module involving narrow bezel requirements can be applied here. For example, the display panel 100 can be an OLED display panel 100, a Micro LED display panel 100, a Mini LED display panel 100, an LCD display panel 100, a quantum dot display panel 100, etc.

[0183] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

[0184] The embodiments of this disclosure have been described above with reference to the accompanying drawings. However, this disclosure is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this disclosure without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this disclosure.

Claims

1. A single-screen module, characterized in that, include: The display panel includes multiple splicing sides, at least one of the splicing sides being a signal source side, and a driving signal circuit is provided on the signal source side; The backlight module is located on the non-display side of the display panel; wherein, On at least one of the splicing sides, the splicing side of the backlight module is provided with a gap limiting structure, the gap limiting structure having a preset extension amount that extends beyond the edge of the display panel along the splicing direction; The gap limiting structure is configured to, when the single-screen module is spliced ​​with another display module, form an abutment structure with a corresponding part of the other display module to define the inter-screen gap between the display panels of the two adjacent modules at least on the signal source side, wherein the preset protrusion amount is equal to or greater than the target value of the inter-screen gap.

2. The single-screen module according to claim 1, characterized in that, The gap limiting structure includes: a gasket limiting component disposed on the splicing side of the backlight module; and / or a protruding pillar limiting component disposed on the splicing side of the backlight module; the gasket limiting component and / or the protruding pillar limiting component protrude from the edge of the display panel along the splicing direction to form an abutment structure between two adjacent single-screen modules.

3. The single-screen module according to claim 2, characterized in that, The gasket limiting assembly includes: At least one gasket is provided on the splicing side of the backlight module; and, A shim adjustment mechanism connected to the at least one shim, the shim adjustment mechanism being configured to adjust the number of shims protruding relative to the edge of the display panel to adjust the preset protrusion amount.

4. The single-screen module according to claim 3, characterized in that, A first groove is provided on the splicing side of the backlight module, and a gasket limiting structure is provided around the first groove; The gasket adjustment mechanism includes: A shaft assembly, the shaft assembly extending axially along the splicing direction, the washer sleeved on the shaft assembly and rotatable about the shaft assembly between a first position and a second position; and, An elastic preload assembly includes a shaft assembly with an axially opposite connecting end and a free end. The connecting end is connected to the splicing side of the backlight module. A stop portion is provided at the free end. A gasket is sleeved on the shaft, and the elastic preload assembly abuts against the spacer and the stop portion to provide an axial elastic preload force to the spacer. At the first position, the gasket is located in the area where the first groove is located; In the second position, the gasket is located in the area where the gasket limiting structure is located; When the single-screen module is spliced ​​with the other display module, the pads located at the second position form an abutment structure between the two adjacent modules, so that the gap between the screens can be determined by adjusting the number of pads located at the second position.

5. The single-screen module according to claim 4, characterized in that, One of the gasket and the gasket limiting structure is a magnetic component, and the other is a magnetically attracted component, so that the gasket and the gasket limiting structure can be magnetically attracted and limited.

6. The single-screen module according to claim 4, characterized in that, The shaft assembly further includes a first screw hole component disposed on the splicing side of the backlight module, wherein the connecting end of the shaft assembly is threaded to the first screw hole component, so that the extension length of the shaft assembly relative to the splicing side of the backlight module is adjustable.

7. The single-screen module according to claim 4, characterized in that, The backlight module includes a back plate and a middle frame, the middle frame being located between the back plate and the display panel, and the splicing side of the back plate being recessed relative to the splicing side of the middle frame; the shaft assembly is disposed on the splicing side of the back plate, and the first groove and the gasket limiting structure are both disposed on the splicing side of the middle frame.

8. The single-screen module according to claim 7, characterized in that, The plurality of splicing sides also includes a non-signal source side for splicing with the signal source side of the other display module; The shaft assembly is located on the splicing side of the signal source side of the back plate; On the non-signal source side, the splicing side of the back panel is provided with a clearance area for avoiding the shaft assembly. When the single-screen module and the other display module have the same structure and the single-screen module and the other display module are spliced ​​together, the free end of the shaft assembly extends into the clearance area of ​​the other display module.

9. The single-screen module according to claim 2, characterized in that, The plurality of splicing sides also includes a non-signal source side spliced ​​with the signal source side of the other display module; The protruding pin limiting component includes: A first limiting groove and a second limiting groove are located on the splicing side of the backlight module, wherein one of the first limiting groove and the second limiting groove is located on the signal source side and the other is located on the non-signal source side; and When the single-screen module and the other display module have the same structure and are spliced ​​together, the first limiting post can abut its axial ends against the first limiting groove and the second limiting groove of the two adjacent modules respectively, so as to limit the inter-screen gap between the display panels of the two adjacent modules.

10. The single-screen module according to claim 9, characterized in that, The first end of the first limiting post has a protruding stud, and the first limiting groove has an internal thread. Wherein, when the single-screen module and the other display module have the same structure, and the single-screen module and the other display module are spliced ​​together, the convex stud is connected to the internal thread of the first limiting groove, and the first axial end of the first limiting post abuts against the bottom surface of the first limiting groove; the second axial end of the first limiting post abuts against the bottom surface of the second limiting groove of the other display module.

11. The single-screen module according to claim 9, characterized in that, There are multiple grooves in both the first limiting groove and the second limiting groove. Each first limiting groove and each second limiting groove are arranged in a one-to-one correspondence. The multiple first limiting grooves and / or second limiting grooves have different depths, so that the gap between the screens can be adjusted by selecting to cooperate the first limiting post with the first limiting groove and / or second limiting groove of different depths.

12. The single-screen module according to claim 9, characterized in that, The backlight module includes a back plate and a middle frame disposed between the back plate and the display panel; wherein, in the splicing direction, the splicing side of the middle frame protrudes relative to the splicing side of the back plate, and the first limiting groove and the second limiting groove are respectively disposed on different splicing sides of the middle frame.

13. The single-screen module according to claim 2, characterized in that, The plurality of splicing sides also includes a non-signal source side spliced ​​with the signal source side of the other display module; The protruding pin limiting component includes: The first protruding post assembly is disposed on the signal source side of the backlight module; and The second protruding post assembly is located on the non-signal source side of the backlight module; The first protruding post assembly and the second protruding post assembly each have an end that protrudes from the edge of the display panel along the splicing direction; when the single-screen module is spliced ​​with the other display module, the ends of the first protruding post assembly of the single-screen module and the second protruding post assembly of the other display module abut against each other to form the abutting structure.

14. The single-screen module according to claim 13, characterized in that, At least one of the first protruding post assembly and the second protruding post assembly includes a first adjustable bolt, which is screwed to the splicing side of the backlight module to adjust the gap between the screens by rotating the first adjustable bolt.

15. The single-screen module according to claim 2, characterized in that, The plurality of splicing sides also includes a non-signal source side spliced ​​with the signal source side of the other display module; The protruding post limiting component includes: The third protruding pillar assembly is disposed on the splicing side of the backlight module and located on the signal source side. The third protruding pillar assembly has an end that protrudes from the edge of the display panel along the splicing direction. When the single-screen module is spliced ​​with the other display module, the end of the third protruding pillar assembly of the single-screen module abuts against the non-signal source side splicing side of the other display module.

16. The single-screen module according to claim 15, characterized in that, The third protruding post assembly includes a second adjustable bolt, which is screwed onto the splicing side of the backlight module to adjust the gap between the screens by rotating the second adjustable bolt.

17. The single-screen module according to claim 16, characterized in that, The backlight module includes: a back plate and a middle frame disposed between the back plate and the display panel; In the splicing direction, the splicing side of the middle frame protrudes relative to the splicing side of the back plate; A second screw hole is provided on the signal source side of the back panel. The connecting end of the second adjustable bolt is threaded into the second screw hole so that the gap between the screens can be adjusted by rotating the second adjustable bolt.

18. The single-screen module according to claim 17, characterized in that, The non-signal source side of the back panel is provided with a third limiting groove; when the single screen module is spliced ​​with the other display module, the end of the second adjustable bolt abuts against the bottom surface of the third limiting groove of the other display module.

19. The single-screen module according to claim 16, characterized in that, The second adjustable bolt has at least one slot circumferentially provided in the middle of its shank, the slot being used for a tool to rotate the second adjustable bolt.

20. The single-screen module according to claim 2, characterized in that, The plurality of splicing sides also includes a non-signal source side spliced ​​with the signal source side of the other display module; The protruding pin limiting component includes: A second limiting post is provided on the splicing side of the backlight module. The second limiting post protrudes a predetermined length relative to the splicing side of the backlight module along the splicing direction, and the end of the second limiting post is provided with a connecting groove extending along the axial direction. A third limiting post is provided on the splicing side of the backlight module, and the third limiting post protrudes relative to the splicing side of the backlight module along the splicing direction; The second limiting post is located on one of the signal source side and the non-signal source side, and the third limiting post is located on the other of the signal source side and the non-signal source side. When the single-screen module and the other display module have the same structure and the single-screen module and the other display module are spliced ​​together, the third limiting post is embedded in the connecting groove of the other display module to form an abutment structure between the two adjacent modules.

21. The single-screen module according to claim 20, characterized in that, The second limiting post is rotatably mounted on the splicing side of the backlight module, and the connecting groove is threadedly connected to the third limiting post so that the gap between the screens can be adjusted by rotating the second limiting post.

22. The single-screen module according to claim 20, characterized in that, The backlight module includes a back plate, and the third limiting post is an integral structure with the back plate.

23. A splicing display device, characterized in that, It includes multiple display modules spliced ​​together, wherein at least one display module adopts a single-screen module as described in any one of claims 1 to 22.

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