An ultra-narrow frame liquid crystal display screen module and a seamless splicing frame structure

Abstract

The application discloses a kind of ultra-narrow frame liquid crystal display screen module and seamless splicing frame structure, including display screen module, compensation module and clamping position component, display screen module includes outer frame, liquid crystal panel and backlight module, compensation module includes FPC substrate, LED compensation strip and encapsulation edge strip, clamping position component includes multiple fixed blocks, lead-out shaft and lower wedge block.The application is realized by setting liquid crystal display screen module, the synchronous shunt and independent driving of video signal, effectively avoid picture misregistration or tearing;By setting compensation module, real-time extraction of the color and brightness information of the edge pixels on both sides of the joint, drive the light-emitting unit to emit light synchronously, visually fill the joint area;By setting clamping position component, realize the quick positioning and locking between multiple display screen modules, ensure the stability and reliability of splicing state.

Description

Technical Field

[0001] This invention relates to the field of display device technology, specifically to an ultra-narrow bezel LCD display module and a seamless splicing frame structure. Background Technology

[0002] Traditional LCD display units mainly consist of LCD panel assemblies, backlight modules, and structural frames. Due to limitations in panel manufacturing processes and material characteristics, a certain width of non-display area must be reserved around the perimeter of the LCD panel to house the sealing frame, gate drive circuitry, and fan-out wiring. This area cannot hold effective image content, making it difficult to eliminate the physical bezel. When multiple display units are matrixed to form a large-area display wall, the independent physical bezels of each unit are continuously arranged horizontally and vertically, accumulating to form a uniform black grid-like seam visible to the naked eye. These seams appear as dark lines in bright scenes and become abrupt dividing lines in dark or transitional scenes, severely disrupting the visual continuity of the overall image and destroying the integrity and immersive experience of the image.

[0003] In existing technologies, there are solutions that use optical compensation to visually mask physical seams. These solutions utilize the distortion of the image at the seam to achieve continuity in viewing angle, thereby masking the seams of the display units. Furthermore, optical effects such as microprism structures and wide-angle heat dissipation layers are used to compensate for the distortion caused by the image deformation at the seam.

[0004] However, existing optical compensation solutions essentially involve deflecting and amplifying the edges of the image. The limited deflection capability of microprisms in complex images can easily lead to loss of detail or geometric misalignment at the seams. Furthermore, the gradient distribution design of microprisms introduces non-uniform amplification, causing straight lines or text to bend and distort when passing through the seams, affecting the consistency of the image. In addition, the wide-angle scattering layer introduced to expand the viewing angle will reduce the contrast and black level performance at a normal viewing angle, causing the seam area to appear grayish or white in dark scenes, requiring additional brightness adjustment functions for the seam area. Summary of the Invention

[0005] The purpose of this invention is to provide an ultra-narrow bezel LCD display module and a seamless splicing frame structure, which has the advantages of visual compensation and status monitoring, and solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an ultra-narrow bezel liquid crystal display module, comprising: The outer frame is provided with infrared emitting tubes and infrared receiving tubes on its peripheral walls, and a driving board is provided inside the outer frame. The cover plate, located above the outer frame, is made of tempered glass with a thickness of 0.5-0.7mm; An upper polarizer is attached to the bottom of the cover plate and has a thickness of 0.1-0.15 mm. The liquid crystal panel is attached to the bottom of the upper polarizer and includes a color filter substrate, a liquid crystal layer, an array substrate, and a lower polarizer, with a total thickness of 1.5-2mm. The backlight module is attached to the bottom of the liquid crystal panel and includes a brightness enhancement film, a diffusion film, a light guide plate, and a reflective sheet. LED light strips are attached to one side of the backlight module to provide a display light source; The compensation module is detachably embedded in the outer periphery of the splice between the outer frame and the cover plate, and is used to visually compensate the image at the splice seam. The compensation module includes an FPC substrate, an LED compensation strip disposed on the upper surface of the FPC substrate, an encapsulation strip covering the outside of the LED compensation strip, and a drive interface for receiving drive signals.

[0007] Preferably, the compensation module includes: The FPC substrate is bonded to the top of the outer periphery of the frame, with a thickness of 0.15-0.25mm, conductive lines are printed on the surface, and thermally conductive copper foil is provided on the back. The LED compensation strip is composed of Mini-LEDs with a pixel pitch of less than P1.5 and is arranged in a matrix of two columns and sixteen rows. The encapsulation strip is made of polycarbonate with a thickness of 0.5-1cm and is configured as an optical structure of a high-transmittance converging lens. The drive interface receives signals from the drive board inside the outer frame and sends them to the FPC substrate.

[0008] Preferably, both ends of the FPC substrate and the LED compensation strip are configured with bidirectional 45° straight chamfers to form a splicing structure.

[0009] Preferably, the splicing point of the outer frame and the outer periphery of the cover plate is set in an inverted L-shaped step for embedding the FPC substrate and the LED compensation strip.

[0010] Preferably, the encapsulation strip covers the LED compensation strip, and the optical focal point of its high-transmittance converging lens structure is aligned with the light-emitting surface of the LED compensation strip.

[0011] Preferably, the infrared emitting tubes and infrared receiving tubes on the peripheral wall of the outer frame are arranged in pairs and are located on adjacent or opposite peripheral walls of the outer frame, respectively, for detecting touch or occlusion signals.

[0012] Preferably, a seamless splicing frame structure includes multiple sets of locking components disposed at the bottom of the outer frame perimeter wall. Each set of locking components includes two spaced-apart fixing blocks. The fixing blocks are fixedly connected to the side wall of the outer frame. Each fixing block has a sliding groove inside. A sliding shaft is axially penetrated through the center of each fixing block. A ring pin is fixedly connected to the middle section of each sliding shaft. The ring pin is slidably connected to the corresponding position of the sliding groove.

[0013] Preferably, the multiple fixing blocks on the left, right and top and bottom sides of the outer frame are staggered to form a splicing and interlocking structure.

[0014] Preferably, a sliding shaft on the right side and below of the outer frame extends axially along the side wall of the outer frame and is fixedly connected to an outlet shaft. A locking pin is fixedly connected to the end of the outlet shaft away from the fixing block. A paddle is fixedly connected below the locking pin, and a fixing rod is fixedly connected above the outlet shaft. Springs are fixedly connected to the side walls of the outer frame at positions corresponding to the guide shaft. The axial ends of the paddle are chamfered and engage with the springs.

[0015] Preferably, each of the fixed rods has a lower wedge block fixedly connected to its top end, an upper wedge block is pressed and driven onto the inclined surface of the lower wedge block, a pin is fixedly connected to the top end of the upper wedge block, and a compression spring is sleeved on the outer contour of the pin and fixedly connected to the upper surface of the upper wedge block; the lower wedge block is horizontally slidably connected to the outer frame, the upper wedge block is vertically slidably connected to the outer frame, and the pin is electrically connected to the drive plate inside the outer frame.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention, by setting up a liquid crystal display module and a compensation module, enables synchronous distribution and independent driving of video signals in the liquid crystal display module, ensuring that the main screen and the compensation screen are updated synchronously in the same frame, effectively avoiding screen misalignment or tearing. The compensation module extracts the color and brightness information of the pixels on both sides of the seam in real time, driving the light-emitting units to emit light synchronously, visually filling the seam area, so that viewers can obtain a seamless display effect from both front and side viewing angles; at the same time, the intensity and color temperature of the compensation module can be independently and dynamically adjusted, calibrating the brightness and color temperature differences between it and the main screen in real time, effectively avoiding abnormal brightness in the seam area in dark scenes; the encapsulation structure encapsulates the light-emitting units into a flat and smooth light-emitting surface, eliminating the height difference at the seam, and at the same time, its special optical structure eliminates the graininess of point light sources, making the light emission more uniform and soft, and eliminating the need for light-shielding tape, fundamentally eliminating the conditions for the formation of black grid-like seams.

[0017] 2. This invention achieves rapid positioning and locking between multiple display modules by setting up a locking component, ensuring stable and reliable splicing. At the same time, through a state linkage mechanism, the compensation module is only connected and put into working mode in the splicing state, and remains disconnected in the non-splicing state. This achieves synchronous linkage between the working state of the compensation module and the splicing state, ensuring that the device can operate stably and reliably in diverse usage scenarios, without affecting the appearance integrity and display effect of the display module when used alone. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is an exploded view of the display module of the present invention; Figure 3 This is an exploded view of the compensation module of the present invention; Figure 4 This is a cross-sectional view of the joint location of the present invention; Figure 5 This is a structural diagram of the card slot component of the present invention; Figure 6 This is a diagram showing the splicing state of the card slot component of the present invention; Figure 7 This is a bottom view of the outer frame of the present invention in its assembled state; Figure 8 This is a partial enlarged view of the card slot component of the present invention; Figure 9 This is a diagram showing the positions of the positioning component and the compensation module of the present invention.

[0019] In the diagram: 1. Outer frame; 11. Cover plate; 12. Upper polarizer; 13. LCD panel; 14. Backlight module; 15. LED light strip; 2. FPC substrate; 21. LED compensation strip; 22. Encapsulation edge strip; 23. Drive interface; 3. Fixing block; 31. Slide groove; 32. Slide shaft; 33. Ring pin; 4. Outlet shaft; 41. Locking pin; 42. Paddle; 43. Fixing rod; 44. Spring; 5. Lower wedge block; 51. Upper wedge block; 52. Pin; 53. Compression spring. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1:

[0022] Please see Figures 1 to 9This invention provides a technical solution: an ultra-narrow bezel LCD display module, comprising: The outer frame 1 is provided with infrared emitting tubes and infrared receiving tubes on its peripheral walls, and a driving board is provided inside the outer frame 1. The cover plate 11 is disposed above the outer frame 1 and is made of tempered glass with a thickness of 0.5-0.7mm; An upper polarizer 12 is attached to the bottom of the cover plate 11 and has a thickness of 0.1-0.15 mm. The liquid crystal panel 13 is attached to the bottom of the upper polarizer 12 and includes a color filter substrate, a liquid crystal layer, an array substrate, and a lower polarizer, with a total thickness of 1.5-2mm. The backlight module 14 is attached to the bottom of the liquid crystal panel 13 and includes a brightness enhancement film, a diffusion film, a light guide plate, and a reflective sheet. LED light strip 15 is attached to one side of the backlight module 14 to provide a display light source; The compensation module is detachably embedded in the outer periphery of the splicing joint between the outer frame 1 and the cover plate 11, and is used to perform visual compensation on the image at the splicing joint. The compensation module includes an FPC substrate 2, an LED compensation strip 21 disposed on the upper surface of the FPC substrate 2, an encapsulation edge strip 22 covering the outside of the LED compensation strip 21, and a drive interface 23 for receiving drive signals.

[0023] This solution achieves active image compensation in the splicing area by embedding an independent compensation module in the physical seam between adjacent outer frames 1 and cover plates 11. The compensation module obtains the color and brightness information of the main image edges on both sides of the seam in real time through the drive plate inside the outer frame 1, and drives the light emission accordingly to visually fill the seam area, so that viewers can obtain a seamless and continuous display effect from both front and side viewing angles, effectively eliminating the visual fragmentation of the image caused by the black grid in traditional video walls.

[0024] It should be noted that, due to its pluggable structure, the compensation module can be flexibly installed or removed according to different splicing scenarios, meeting the diverse combination needs of display modules. Furthermore, the pluggable / unpluggable state of the compensation module is linked to the splicing state of the corresponding edge of the display module. Only when the edge of the display module is spliced ​​will the corresponding compensation module be connected to the circuit and enter active compensation mode; when the edge is not spliced, the compensation module remains disconnected, and the border of the image at that edge is displayed normally, without affecting the appearance integrity and display effect when the module is used alone.

[0025] The LED light strip 15 is located inside the outer frame 1, providing a light source for the entire display system. The light guide plate in the backlight module 14 evenly transmits the backlight to the entire display area, and together with the brightness enhancement film and diffusion film, further improves the light efficiency and light emission uniformity. The LCD panel 13 accurately displays the main screen content under the signal control of the driver board. The upper polarizer 12, as a polarization light filter layer, controls the polarization state of the emitted light to ensure image contrast and display quality. The cover plate 11, as the outermost protective cover, provides a smooth light emission surface and also has structural protection functions, protecting the internal functional layers from physical damage. The multi-layer structure works together to provide a stable and high-quality display foundation for the compensation module.

[0026] Example 2:

[0027] The compensation module includes: The FPC substrate 2 is attached to the top of the outer periphery of the outer frame 1, with a thickness of 0.15-0.25mm, conductive lines are printed on the surface and thermally conductive copper foil is provided on the back. The LED compensation strip 21 is composed of Mini-LEDs with a pixel pitch of less than P1.5 and is arranged in a matrix of two columns and sixteen rows. The encapsulation strip 22 is made of polycarbonate with a thickness of 0.5-1cm and is configured as an optical structure of a high-transmittance converging lens. The drive interface 23 receives signals from the drive board inside the outer frame 1 and sends them to the FPC substrate 2.

[0028] Both ends of the FPC substrate 2 and the LED compensation strip 21 are set with bidirectional 45° straight chamfers to form a splicing structure.

[0029] The splicing point of the outer frame 1 and the cover plate 11 is set in an inverted L-shaped step for embedding the FPC substrate 2 and the LED compensation strip 21.

[0030] The encapsulation strip 22 covers the LED compensation strip 21, and the optical focal point of its high-transmittance converging lens structure is aligned with the light-emitting surface of the LED compensation strip 21.

[0031] The infrared emitting tubes and infrared receiving tubes on the periphery of the outer frame 1 are arranged in pairs and are located on adjacent or opposite periphery walls of the outer frame 1, for detecting touch or occlusion signals.

[0032] This solution achieves synchronous splitting and independent driving of video signals through the driver board inside the outer frame 1. After receiving the input of the external video signal source, the driver board distributes the signal to two independent channels simultaneously through the internal signal processing unit: the first channel is the liquid crystal display driving channel, which is used to control the main screen display of the liquid crystal panel 13; the second channel is the LED compensation driving channel, which is used to drive the LED compensation strip 21 to emit light. The two driving signals strictly maintain frame synchronization in timing, ensuring that the LED compensation strip 21 and the liquid crystal panel 13 are updated synchronously in the same frame, thereby effectively avoiding visual abnormalities such as screen misalignment and tearing of the LED compensation strip 21 and the liquid crystal panel 13 caused by signal delay or asynchrony.

[0033] At the signal processing level, the LED compensation driving channel uses the edge pixel extraction module built into the FPC substrate 2 to analyze the input image signal in real time, accurately extract the color information and brightness data of the edge pixels on both sides of the splicing seam, and use this as the basis for driving the LED compensation strip 21, so that the light emitted by the LED compensation strip 21 maintains a strict correspondence with the edge of the main image in terms of color and brightness, so that the compensated image and the main image form a continuous visual whole.

[0034] At the level of light-emitting devices, the LED compensation strip 21 is independently controlled by the FPC substrate 2, and its luminous intensity and color temperature can be dynamically adjusted. By comparing the brightness and color temperature parameters of the edge pixels, the FPC substrate 2 can calibrate the light emission characteristics of the LED compensation strip 21 in real time, thereby eliminating the difference in brightness and color temperature between the LED compensation strip 21 and the main display area of ​​the LCD panel 13. This effectively solves the problem of abnormal brightness or color distortion in the splicing area under dark scenes, so that the compensated screen can maintain a high degree of consistency with the main screen in any scene, further ensuring the overall visual consistency of the spliced ​​display.

[0035] At the optical structure level, the LED compensation strip 21 is covered by a high-transmittance converging lens optical structure encapsulation strip 22. On the one hand, the encapsulation strip 22 encapsulates the LED compensation strip 21 into a flat and smooth light-emitting surface, completely filling the physical seam between the outer frame 1 of the adjacent display module and the cover plate 11, making the surface of the LED compensation strip 21 flush with the surface of the liquid crystal panel 13, eliminating the height difference that may occur at the seam. On the other hand, the encapsulation strip 22 has dual optical functions of convergence and uniform light: by converging the scattered light emitted by the LED compensation strip 21, it improves the directionality of light emission and light energy utilization, while effectively eliminating the inherent graininess of point light sources, making the light emission more uniform and soft, and improving the optical quality of the compensation area.

[0036] Furthermore, since this solution is essentially a proactive compensation for the missing image and the covering of the seam area, it will not cause distortion of the image at the edge of the display module. Moreover, the structure of the encapsulation strip 22 eliminates the use of light-shielding tape. When adjacent display modules are spliced, the structure of the outer frame 1 itself plays a role in light shielding, effectively blocking stray light leakage from the compensation module and avoiding bright edges or halos. This further avoids the physical lines caused by the light-shielding tape itself and eliminates the conditions for the formation of black grid-like seams.

[0037] Example 3:

[0038] A seamless splicing frame structure includes multiple sets of locking components disposed at the bottom of the perimeter wall of an outer frame 1. Each set of locking components includes two spaced-apart fixing blocks 3. The fixing blocks 3 are fixedly connected to the side wall of the outer frame 1. Each fixing block 3 has a sliding groove 31 inside. A sliding shaft 32 is axially penetrated through the center of each fixing block 3. A ring pin 33 is fixedly connected to the middle section of each sliding shaft 32. The ring pin 33 is slidably connected to the inside of the corresponding sliding groove 31.

[0039] The multiple fixing blocks 3 on the left, right and top and bottom sides of the outer frame 1 are staggered to form a splicing and interlocking structure.

[0040] A sliding shaft 32 on the right side and below of the outer frame 1 extends axially toward the side wall of the outer frame 1 and is fixedly connected to an outlet shaft 4. A locking pin 41 is fixedly connected to the end of the outlet shaft 4 away from the fixing block 3. A paddle 42 is fixedly connected below the locking pin 41. A fixing rod 43 is fixedly connected above the outlet shaft 4. Springs 44 are fixedly connected to the side wall of the outer frame 1 at positions corresponding to the guide shaft 4. The two ends of the axial part of the paddle 42 are set with arc chamfers and engage with the springs 44.

[0041] For multiple display modules that need to be spliced, this solution achieves seamless splicing by designing a locking component, and realizes the linkage effect between the module insertion / removal state and the splicing state of the display module edge.

[0042] First, when splicing display modules, multiple outer frames 1 to be spliced ​​are placed side by side, that is, the left and right or top and bottom sides of multiple display modules correspond to each other. At this time, since multiple fixing blocks 3 on the left and right and top and bottom sides of the outer frame 1 are staggered to form a splicing interlocking structure, the multiple fixing blocks 3 at the splicing seam interlock with each other and the positions of multiple sliding shafts 32 correspond.

[0043] Furthermore, when a person touches and presses the lever 42, the lever 42 causes the locking pin 41 and the guide shaft 4 to slide. At this time, the guide shaft 4 retracts into the interior of the fixed block 3 and drives the sliding shaft 32 to slide synchronously. The ring pin 33 also slides in the sliding groove 31, thereby causing the end of the sliding shaft 32 away from the guide shaft 4 to extend from the interior of the fixed block 3 and insert into the interior of the adjacent fixed block 3. At this time, multiple fixed blocks 3 are locked together by the sliding shaft 32 that fits in sequence. The positions of multiple fixed blocks 3 are fixed, which in turn causes the positions of multiple outer frames 1 to be fixed. Since the cover plate 11 corresponds to the position of the outer frame 1, the positions of multiple cover plates 11 are also fixed. The display module achieves a splicing effect. Multiple adjacent outer frames 1 and cover plates 11 form an inverted L-shaped physical seam for the insertion of the compensation module.

[0044] It should be noted that, due to the engagement between the paddle 42 and the spring 44, and the fact that the spring 44 is curved and the axial ends of the paddle 42 are chamfered, when a person presses the fixing rod 43 to slide the paddle 42, as the paddle 42 approaches the middle section of the spring 44, the paddle 42 will compress the spring 44, causing the spring 44 to deform and store elastic potential energy. Subsequently, when the paddle 42 slides past the middle section of the spring 44, the paddle 42 stops compressing the spring 44, and the elastic potential energy of the spring 44 is released, causing it to spring back to its curved shape. At this time, the paddle 42 is engaged at the other end by the spring 44's rebound, that is, the position of the paddle 42 is restricted to both ends of the spring 44. Figure 7 As shown, in the initial state, the lever 42 is engaged at one end by the spring 44. This position corresponds to the unlock position of the display module. After the user presses the lever 42 and causes it to slide, the lever 42 is engaged at the other end by the spring 44. This position corresponds to the locking position of the display module, thereby preventing damage to the equipment caused by accidental disengagement of the engagement state when the display module is in the splicing state.

[0045] In addition, through the infrared emitting tubes and infrared receiving tubes set on the perimeter wall of the outer frame 1, when the outer frame 1 is in the splicing state, the adjacent infrared emitting tubes and infrared receiving tubes are aligned. At this time, the light emitted by the infrared emitting tube of one display module will be received by the infrared receiving tube of the adjacent display module. Then, the driver board can identify the splicing state at the edge of the corresponding outer frame 1 by detecting whether the corresponding receiving tube has received a signal.

[0046] Example 4:

[0047] The top of each fixed rod 43 is fixedly connected to a lower wedge block 5. The inclined surface of the lower wedge block 5 is pressed and driven to connect an upper wedge block 51. The top of the upper wedge block 51 is fixedly connected to a pin 52. A compression spring 53 is sleeved on the outer contour of the pin 52 and fixedly connected to the upper surface of the upper wedge block 51. The lower wedge block 5 is horizontally slidably connected to the outer frame 1, the upper wedge block 51 is vertically slidably connected to the outer frame 1, and the pin 52 is electrically connected to the drive plate inside the outer frame 1.

[0048] Furthermore, when the person presses the lever 42 to drive the locking pin 41 and the guide shaft 4 to slide, the locking pin 41 drives the fixing rod 43 and the lower wedge block 5 to slide synchronously. At this time, the lower wedge block 5 slides horizontally on the outer frame 1, and the inclined surface of the lower wedge block 5 presses the upper wedge block 51 synchronously. Since the upper wedge block 51 is connected to the outer frame 1 in a vertical sliding position, the upper wedge block 51 can only make vertical displacement. At this time, the pressing force of the lower wedge block 5 on the upper wedge block 51 is divided into horizontal and vertical components along its inclined surface. The horizontal component is canceled out by the outer frame 1 limiting the upper wedge block 51, while the vertical component causes the upper wedge block 51 to start to rise. During this process, the pin 52 and the compression spring 53 rise synchronously.

[0049] It should be noted that the action of pressing the lever 42 by the personnel occurs after the compensation component is inserted into the physical seam between the adjacent display modules, that is, the FPC substrate 2 and the LED compensation strip 21 slide into the inverted L-shaped step formed by the adjacent outer frame 1 and the cover plate 11. At this time, the position of the drive interface 23 corresponds to the position of the pin 52.

[0050] Subsequently, the operator presses the lever 42, causing the pin 52 to rise and insert into the drive interface 23 to achieve electrical connection. Then, through the electrical connection between the pin 52 and the drive interface 23, the FPC substrate 2 is put into working state and continuously receives signals sent by the drive board in the outer frame 1. At the same time, the drive interface 23 and the compression spring 53 perform positioning functions. After the drive interface 23 is inserted into the compression spring 53, the horizontal position of the FPC substrate 2 cannot be changed, so that the overall position of the compensation module is locked.

[0051] It should be noted that during the process of the pin 52 rising and inserting into the drive interface 23, the compression spring 53 tends to rise synchronously. However, since the top of the compression spring 53 contacts the bottom of the FPC substrate 2, and the FPC substrate 2 is embedded in the inverted L-shaped physical seam formed between the outer frame 1 and the cover plate 11, that is, the height of the FPC substrate 2 and the LED compensation strip 21 cannot be changed, the top position of the compression spring 53 remains unchanged, while the bottom of the compression spring 53 continues to rise along with the upper wedge 51, which causes the compression spring 53 to be compressed and store elastic potential energy.

[0052] As the lower wedge 5 slides continuously under pressure, the inclined surfaces between the lower wedge 5 and the upper wedge 51 gradually shift. After the inclined surfaces of the lower wedge 5 and the upper wedge 51 separate, the lower wedge 5 slides directly below the upper wedge 51. At this point, the lower wedge 5 and the upper wedge 51 are in planar contact, and the lower wedge 5 reaches its limit of sliding displacement. Similarly, the upper wedge 51 reaches its limit of rising height. At this point, the compression spring 53 reaches its maximum compression stroke, and its stored elastic potential energy reaches its maximum. The pressure exerted by the compression spring 53 on the FPC substrate 2 and the upper wedge 51 is also at its maximum, which leads to the static friction between the upper wedge 51 and the lower wedge 5 reaching its limit. By applying pressure to the upper wedge 51, the static friction between the lower wedge 5 and the upper wedge 51 increases, thereby further preventing the paddle 42 from accidentally sliding back in the splicing state. This, along with the spring 44, achieves a double cooperation to ensure the stability of the physical connection between adjacent display modules in the splicing state.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An ultra-narrow bezel LCD display module, characterized in that, include: The outer frame (1) is provided with infrared emitting tubes and infrared receiving tubes on its peripheral walls, and a driving board is provided inside the outer frame (1). The cover plate (11) is located above the outer frame (1) and is made of reinforced glass with a thickness of 0.5-0.7mm; An upper polarizer (12) is attached to the bottom of the cover plate (11) and has a thickness of 0.1-0.15 mm. The liquid crystal panel (13) is attached to the bottom of the upper polarizer (12) and includes a color filter substrate, a liquid crystal layer, an array substrate, and a lower polarizer, with a total thickness of 1.5-2 mm. The backlight module (14) is attached to the bottom of the liquid crystal panel (13) and includes a brightness enhancement film, a diffusion film, a light guide plate and a reflective sheet; LED light strips (15) are attached to one side of the backlight module (14) to provide a display light source; The compensation module is detachably embedded in the outer periphery of the splicing part of the outer frame (1) and the cover plate (11) for visual compensation of the image at the splicing joint; The compensation module includes an FPC substrate (2), an LED compensation strip (21) disposed on the upper surface of the FPC substrate (2), an encapsulation strip (22) covering the outside of the LED compensation strip (21), and a drive interface (23) for receiving drive signals.

2. The ultra-narrow bezel LCD display module according to claim 1, characterized in that: The FPC substrate (2) is attached to the top of the outer periphery of the outer frame (1), with a thickness of 0.15-0.25mm, conductive lines are printed on the surface and thermally conductive copper foil is provided on the back. The LED compensation strip (21) is composed of Mini-LEDs with a pixel pitch of less than P1.5 and is arranged in a matrix of two columns and sixteen rows. The encapsulation strip (22) is made of polycarbonate with a thickness of 0.5-1cm and is configured as an optical structure of a high-transmittance converging lens; The drive interface (23) receives signals from the drive board inside the outer frame (1) and sends them to the FPC substrate (2).

3. The ultra-narrow bezel LCD display module according to claim 1, characterized in that: Both ends of the FPC substrate (2) and the LED compensation strip (21) are set with bidirectional 45° straight chamfers to form a splicing structure.

4. The ultra-narrow bezel LCD display module according to claim 1, characterized in that: The splicing point of the outer frame (1) and the cover plate (11) is set in an inverted L-shaped step for embedding the FPC substrate (2) and the LED compensation strip (21).

5. The ultra-narrow bezel LCD display module according to claim 1, characterized in that: The encapsulation strip (22) covers the LED compensation strip (21) above it, and the optical focus of its high-transmittance converging lens structure is aligned with the light-emitting surface of the LED compensation strip (21).

6. The ultra-narrow bezel LCD display module according to claim 1, characterized in that: The infrared emitting tubes and infrared receiving tubes on the periphery of the outer frame (1) are arranged in pairs and are located on adjacent or opposite periphery walls of the outer frame (1) respectively, for detecting touch or occlusion signals.

7. A seamless splicing frame structure, applicable to the ultra-narrow bezel display module as described in any one of claims 1-6, characterized in that: The device includes multiple sets of locking components located at the bottom of the perimeter wall of the outer frame (1). Each set of locking components includes two spaced fixing blocks (3). The fixing blocks (3) are fixedly connected to the side wall of the outer frame (1). The fixing blocks (3) are provided with sliding grooves (31) inside. The center of each fixing block (3) is axially penetrated by a sliding shaft (32). The middle section of each sliding shaft (32) is fixedly connected with a ring pin (33). The ring pin (33) is slidably connected to the corresponding position of the sliding groove (31).

8. A seamless splicing frame structure according to claim 7, characterized in that: The multiple fixing blocks (3) on the left, right and top and bottom sides of the outer frame (1) are staggered to form a splicing and interlocking structure.

9. A seamless splicing frame structure according to claim 7, characterized in that: A sliding shaft (32) located on the right and below the outer frame (1) extends axially toward the side wall of the outer frame (1) and is fixedly connected to an outlet shaft (4). A locking pin (41) is fixedly connected to one end of the outlet shaft (4) away from the fixing block (3). A paddle (42) is fixedly connected below the locking pin (41). A fixing rod (43) is fixedly connected above the outlet shaft (4). Springs (44) are fixedly connected to the side wall of the outer frame (1) at the position corresponding to the guide shaft (4). The two ends of the axial direction of the paddle (42) are set with arc chamfers and engage with the springs (44).

10. A seamless splicing frame structure according to claim 9, characterized in that: The top of each of the fixed rods (43) is fixedly connected to a lower wedge block (5), and the inclined surface of the lower wedge block (5) is pressed and connected to an upper wedge block (51). The top of the upper wedge block (51) is fixedly connected to a pin (52), and a compression spring (53) fixedly connected to the upper surface of the upper wedge block (51) is sleeved on the outer contour of the pin (52). The lower wedge block (5) is limited to a horizontal sliding connection with the outer frame (1), the upper wedge block (51) is limited to a vertical sliding connection with the outer frame (1), and the pin (52) is electrically connected to the drive plate inside the outer frame (1).

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