Touch display module

Abstract

This utility model discloses a touch display module, relating to the field of touch display technology. It aims to solve existing problems such as bubbles, delamination, and warping caused by large bonding areas and differences in material thermal expansion, as well as the long, inefficient, and inconsistent segmented operation processes, the difficulty of adapting traditional equipment to irregularly shaped structures, and the incompatibility of curing and defoaming processes with large-size requirements. The key technical point is that it includes a touch display module body, which comprises a display module encased in a shell. The display module, from front to back, consists of a glass cover, a touch sensor, an SCA adhesive layer, an OCA adhesive layer, and a liquid crystal display panel, all stacked sequentially. The display module is mounted within an aluminum structural frame surrounding it. This achieves advantages such as full bonding and integrated assembly, high bonding yield, strong structural stability, and adaptability to irregularly shaped large-size screens.

Description

Technical Field

[0001] This utility model relates to the field of touch display technology, and in particular to a touch display module. Background Technology

[0002] With the continuous development of human-computer interaction technology, touch-sensitive cover glass is increasingly widely used in consumer electronics, industrial control, smart terminals, automotive displays, and commercial displays. Especially in medium-to-large and ultra-large display devices (such as all-in-one machines, digital signage, conference flat panels, and educational whiteboards), users have increasingly higher requirements for integrated product appearance, display clarity, touch sensitivity, and structural reliability. To meet these needs, full lamination technology has gradually become the mainstream process.

[0003] However, existing touch display modules are prone to defects such as bubbles, delamination, and warping when using OCA or SCA adhesives due to their large bonding area and differences in material thermal expansion, resulting in low yield and reliability. Existing technologies employ segmented operations, with bonding, backlight assembly, and overall assembly being independent processes, leading to long workflows, low efficiency, and poor consistency. At the same time, traditional equipment is difficult to adapt to irregular structures such as rounded corners and cutouts, and uneven bonding pressure can easily lead to edge failure. Furthermore, curing and defoaming processes often use parameters specific to small dimensions, making it difficult to meet the needs of large sizes. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a touch display module that features full lamination and integrated assembly, high lamination yield, strong structural stability, and compatibility with irregularly shaped and large-size screens. It solves the problems of existing defects such as bubbles, delamination, and warping caused by large lamination areas and differences in material thermal expansion, as well as the long segmented operation process, low efficiency, poor consistency, difficulty of adapting traditional equipment to irregular structures, and incompatibility of curing and defoaming processes with large-size requirements.

[0005] The technical solution of this utility model is as follows: a touch display module, comprising a touch display module body, the touch display module body including a display module, the display module being encased in a shell, the display module having a glass cover, a touch sensor, an SCA adhesive layer, an OCA adhesive layer and a liquid crystal display panel stacked sequentially from front to back, the display module being installed in an aluminum structural frame, the aluminum structural frame surrounding the display module, its front edge being inlaid with the outer periphery of the glass cover, the rear end of the display module having a backplate, the backplate having a backlight assembly, the backlight assembly including a motherboard, a routing board, a touch panel, a backlight power board and a power switch, the rear end of the backplate having a removable back cover, the back cover covering the back of the backlight assembly, the aluminum structural frame having symmetrical splicing pieces on the left and right sides of the display module.

[0006] By adopting the above technical solution, the display, touch control and structural support are integrated into one, which effectively improves the rigidity and appearance of the whole machine, and facilitates subsequent assembly and maintenance.

[0007] Furthermore, the aluminum structural frame has a first mounting groove inside, the splicing component has a second mounting groove inside, the aluminum structural frame has multiple first mounting holes at its four corners, and the two splicing components have symmetrical second mounting holes at their upper and lower ends.

[0008] By adopting the above technical solution, the display module and back panel are precisely positioned using the mounting slot, and multi-point fastening is achieved with the mounting holes, which significantly improves the assembly accuracy and structural stability, and is especially suitable for the reliable fixing of large-size modules.

[0009] Furthermore, the back plate is embedded in two splicing components and an aluminum structural frame, and is connected by a mounting plate. The mounting plate is fixed to the splicing components and the aluminum structural frame by fasteners threaded into the second mounting hole. The splicing components and the aluminum structural frame are connected by an L-shaped connecting plate. The L-shaped connecting plate has a first through hole inside which is connected by fasteners threaded.

[0010] By adopting the above technical solutions, a closed frame support system is formed, which enhances the overall resistance to torsion and bending, and avoids the loosening or misalignment of internal components due to transportation vibration or temperature changes.

[0011] Furthermore, the aluminum structural frame is provided with four corner connecting plates at its four corners, and the four corner connecting plates are provided with second through holes.

[0012] By adopting the above technical solution, the connection strength of the four corners of the module is strengthened, and stress concentration is effectively dispersed. At the same time, the second through hole can be used for wiring, heat dissipation or auxiliary fixation, thereby improving the structural functionality and adaptability.

[0013] Furthermore, the aluminum structural frame has symmetrical hooks on the left and right sides at the rear end, and each of the four hooks has a hook hole inside. The aluminum structural frame also has symmetrical fixing holes on the left and right sides at the rear end. The four hooks and the aluminum structural frame are fixed by screws passing through the hook holes and being threaded into the fixing holes.

[0014] By adopting the above technical solution, the back cover and the main structure can be quickly snapped together and pre-positioned, and the screws can be tightened twice, which takes into account both assembly efficiency and connection reliability, and facilitates disassembly and maintenance in the future.

[0015] Furthermore, the backlight assembly includes a routing board, a motherboard, a motherboard battery, a backlight power board, a touch panel, and a power switch.

[0016] By adopting the above technical solution, the core electronic functional modules are centrally integrated in the back panel area, achieving a high degree of synergy between signal processing, power management and touch driving, thereby improving the system response speed and operational stability.

[0017] Furthermore, a switch button is provided at the front end of the housing, and the switch button is electrically connected to the power switch.

[0018] By adopting the above technical solution, users can conveniently control the start and stop of the whole machine through the exposed switch button. The operation is intuitive, and the button position conforms to the ergonomic design, improving the user experience.

[0019] Furthermore, the backlight source in the backlight assembly is fixed to the back side of the liquid crystal display panel by a screen locking strip to prevent displacement or detachment during transportation or use.

[0020] By adopting the above technical solutions, the problems of loosening and shifting of large-size backlights are effectively solved, ensuring backlight uniformity and long-term reliability, and avoiding bright spots or dark areas.

[0021] Furthermore, the aluminum structural frame and the display module are bonded together with 3M adhesive, achieving integrated assembly of the display module and the aluminum structural frame and improving the overall structural stability.

[0022] By adopting the above technical solution, the high bonding strength and buffering properties of 3M adhesive can be used to absorb the stress caused by the difference in thermal expansion between materials, prevent warping or delamination, and at the same time simplify the assembly process and improve production efficiency.

[0023] Furthermore, the glass cover is a 41-inch irregularly shaped cover, and the liquid crystal display panel is a 27-inch OC panel. The two are bonded together in a staggered manner through SCA adhesive layer and OCA adhesive layer to adapt to the structural layout of the asymmetrical display area.

[0024] By adopting the above technical solution, the precise misalignment bonding of large-size irregular cover plates and smaller-size LCD screens was successfully achieved. While meeting the requirements of integrated product appearance design, it effectively avoids the problems of edge bubbles and uneven bonding that are easily generated in traditional full lamination processes under asymmetrical structures, thus expanding the application scope of full lamination technology in irregular display devices.

[0025] The beneficial effects of this utility model are: 1. This touch display module achieves full lamination and integrated assembly of the whole machine. It deeply integrates the full lamination process of TP (touch panel) and OC (liquid crystal display panel) with the whole machine assembly process such as backlight, motherboard, and structural frame. It avoids the problems of long process, misalignment and poor consistency caused by traditional segmented operation, and greatly improves production efficiency and product yield. It is especially suitable for the mass production of medium and large-sized irregular products such as 41-inch cover and 27-inch LCD screen.

[0026] 2. This touch display module adopts a double-adhesive full-lamination structure combining SCA adhesive layer and OCA adhesive layer, and is combined with vacuum pressing, pressure debubbling and UV curing processes, which significantly reduces defects such as bubbles, delamination and warping caused by the difference in thermal expansion coefficients of materials, and improves optical performance and structural reliability.

[0027] 3. This touch display module features an aluminum frame surrounding the display module, secured with 3M adhesive, providing high-strength support, thermal expansion buffering, and electromagnetic shielding. Four corner connecting plates and splicing components are installed at the four corners, allowing for flexible adaptation to irregularly shaped screens such as rounded corners and punch-hole displays, ensuring uniform edge fit and eliminating the risk of failure. The backlight assembly is rigidly fixed to the back of the LCD panel via a screen locking strip to prevent displacement during transport or use. The motherboard, routing board, touchpad, and other circuit modules are centrally mounted on the back panel. The back cover employs a dual detachable structure of hooks and screws, facilitating future maintenance, battery replacement, and functional expansion. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of the touch display module of this utility model; Figure 2 This is a side view of the three-dimensional structure of the touch display module of this utility model; Figure 3 This is a rear view of the three-dimensional structure of the touch display module of this utility model; Figure 4 This is a partial three-dimensional schematic diagram of the aluminum structural frame of this utility model; Figure 5 This is a schematic diagram of the internal component structure of the touch display module of this utility model; Figure 6 This is a schematic diagram of the internal structure of the display module of this utility model.

[0029] In the diagram: 1. Touch display module body; 2. Housing; 3. Switch button; 4. Display module; 41. Glass cover; 42. Touch sensor; 43. SCA adhesive layer; 44. OCA adhesive layer; 45. LCD display panel; 5. Hook; 6. Back cover; 7. Aluminum structural frame; 8. Splicing component; 9. Mounting plate; 10. L-shaped connecting plate; 11. First through hole; 12. First mounting hole; 13. First mounting groove; 14. Second mounting groove; 15. Second mounting hole; 16. Hook hole; 17. Four corner connecting plates; 18. Fixing hole; 19. Second through hole; 20. Back plate; 21. Backlight assembly; 2101. Router board; 2102. Main board; 2103. Main board battery; 2104. Backlight power board; 2105. Touch panel; 2106. Power switch. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figures 1-6 This embodiment of a touch display module includes a touch display module body 1, which includes a display module 4. The display module 4 is encased in a housing 2. The display module 4 is arranged from front to back with a glass cover plate 41, a touch sensor 42, an SCA adhesive layer 43, an OCA adhesive layer 44, and a liquid crystal display panel 45. The display module 4 is installed in an aluminum structural frame 7, which surrounds the display module 4. Its front edge is embedded in the outer periphery of the glass cover plate 41. The rear end of the display module 4 is provided with a back plate 20, on which a backlight assembly 21 is provided. The backlight assembly 21 includes a main board 2102, a routing board 2101, a touch panel 2105, a backlight power board 2104, and a power switch 2106. The rear end of the 0 is equipped with a removable back cover 6, which covers the backlight assembly 21. The aluminum structural frame 7 has symmetrical splicing parts 8 on the left and right sides located on both sides of the display module 4. The backlight assembly 21 includes a routing board 2101, a motherboard 2102, a motherboard battery 2103, a backlight power board 2104, a touch panel 2105, and a power switch 2106. The aluminum structural frame 7 and the display module 4 are fixed together with 3M adhesive to achieve integrated assembly of the display module 4 and the aluminum structural frame 7, thereby improving the overall structural stability. The glass cover 41 is a 41-inch irregularly shaped cover, and the LCD display panel 45 is a 27-inch OC panel. The two are staggered and bonded together by SCA adhesive layer 43 and OCA adhesive layer 44 to adapt to the structural layout of the asymmetrical display area.

[0032] In this embodiment, the various functional modules of the backlight assembly 21 work together to achieve image display and touch interaction. The removable back cover 6 covers the back of the backlight assembly 21, which facilitates later maintenance and component replacement. It is used to enhance the lateral support strength and adapt to the assembly requirements of large-size modules. The aluminum structural frame 7 is fixed to the display module 4 with 3M adhesive, which not only realizes the integrated assembly of the display module 4 and the structural frame, but also effectively absorbs the internal stress caused by the difference in the thermal expansion coefficient of the materials, thereby improving the stability and reliability of the whole structure. It can flexibly adapt to the structural layout of asymmetrical display areas, while meeting the industrial aesthetics of the product and avoiding the problems of bubbles, delamination or uneven bonding that are prone to occur at irregular boundaries in traditional full lamination processes.

[0033] Please refer to 3. In this embodiment, the aluminum structural frame 7 has a first mounting groove 13 inside, the splicing piece 8 has a second mounting groove 14 inside, the aluminum structural frame 7 has multiple first mounting holes 12 at each of its four corners, the two splicing pieces 8 have symmetrical second mounting holes 15 at their upper and lower ends, the back plate 20 is embedded in the two splicing pieces 8 and the aluminum structural frame 7 and is connected by a mounting plate 9. The mounting plate 9 is fixed to the splicing pieces 8 and the aluminum structural frame 7 by fasteners threaded into the second mounting holes 15. The splicing pieces 8 and the aluminum structural frame 7 are connected by an L-shaped connecting plate 10. The L-shaped connecting plate 10 has a first through hole 11 inside which is connected by fasteners threaded. The four corners of the aluminum structural frame 7 have four corner connecting plates 17, and the four corner connecting plates 17 have second through holes 19.

[0034] It should be noted that the combination of multiple mounting slots and mounting holes not only improves assembly accuracy and efficiency, but also significantly enhances the overall machine's resistance to vibration and deformation during transportation, installation, and use, making it particularly suitable for medium to large-sized commercial display devices such as conference tablets and educational whiteboards.

[0035] Please see Figures 2-3 The aluminum structural frame 7 has symmetrical hooks 5 on the left and right sides at the rear end. Each of the four hooks 5 has a hook hole 16 inside. The aluminum structural frame 7 has symmetrical fixing holes 18 on the left and right sides at the rear end. The four hooks 5 and the aluminum structural frame 7 are fixed by screws passing through the hook holes 16 and being threaded into the fixing holes 18.

[0036] It should be noted that this double fixing structure takes into account both ease of assembly and connection reliability. It can prevent the back cover 6 from loosening and falling off, and also makes it easy for users or maintenance personnel to quickly remove the back cover 6 to access the internal circuit module, thus improving the maintainability of the product.

[0037] Please see Figure 1 and Figure 5 In this embodiment, the front end of the housing 2 is provided with a switch button 3, which is electrically connected to the power switch 2106. The backlight in the backlight assembly 21 is fixed to the back side of the liquid crystal display panel 45 by a screen locking strip to prevent displacement or detachment during transportation or use.

[0038] It should be noted that using a screen lock strip to mechanically limit the backlight can effectively prevent the backlight from shifting, tilting or falling off during transportation or long-term use, ensuring backlight uniformity and display consistency, avoiding local bright spots or dark areas, thereby improving the reliability and visual experience of the product in long-term use.

[0039] The working principle of the above embodiments is as follows: In use, the glass cover plate 41 and the touch sensor 42 are bonded together under high temperature and UV curing in a vacuum environment through SCA adhesive layer 43 to form an integrated touch panel TP, which effectively reduces interface reflection and improves light transmittance. The TP is then bonded to the liquid crystal display panel 45 through OCA adhesive layer 44 and subjected to pressure debubbling treatment to eliminate bubbles and stress, ensuring the optical uniformity and structural flatness of the large-size screen. The bonded display module 4 is embedded in the aluminum structural frame 7, and its front edge is fitted with the outer periphery of the glass cover plate 41. The four sides are fixed by 3M adhesive, taking into account both structural strength and thermal expansion compensation. The backlight is rigidly fixed to the back side of the liquid crystal panel by the screen locking strip to prevent displacement. The back plate 20, splicing component 8, and L-shaped connecting plate 10 together form a supporting frame. The main circuit board 2102, routing board 2101, and other modular components are installed on the back plate 20 for easy maintenance. Finally, the removable back cover 6 is connected by hook 5. It is double-fixed to the rear end of the aluminum structural frame 7 with screws, forming a closed whole structure, which has the functions of heat dissipation, dust prevention and electromagnetic shielding.

[0040] It should be noted that the operation control of this utility model (including the start and stop of each functional module and signal interaction) can be achieved through conventional control methods well known to those skilled in the art, such as logic control through the motherboard 2102 in conjunction with the touch panel 2105 and the power switch 2106; the specific circuit connection, power supply and switch operation methods are all common knowledge in the field, and the core of this utility model lies in the structural integration and full-fit assembly scheme of the touch display module, rather than the control logic or power supply system itself, so the relevant control circuits and driving methods will not be described in detail.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0042] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A touch display module, comprising a touch display module body (1), the touch display module body (1) comprising a display module (4), the display module (4) being encased in a shell (2), the display module (4) being provided with a glass cover plate (41), a touch sensor (42), an SCA adhesive layer (43), an OCA adhesive layer (44) and a liquid crystal display panel (45) stacked sequentially from front to back, characterized in that: The display module (4) is installed in an aluminum structural frame (7), which surrounds the display module (4). Its front edge is embedded in the outer periphery of the glass cover plate (41). The rear end of the display module (4) is provided with a back plate (20), and the back plate (20) is provided with a backlight assembly (21). The backlight assembly (21) includes a motherboard (2102), a routing board (2101), a touch panel (2105), a backlight power board (2104), and a power switch (2106). The rear end of the back plate (20) is provided with a removable back cover (6), which covers the back of the backlight assembly (21). The left and right sides inside the aluminum structural frame (7) are provided with splicing pieces (8) symmetrically located on both sides of the display module (4). 2.The touch display module of claim 1, wherein: The aluminum structural frame (7) has a first mounting groove (13) inside, the splicing piece (8) has a second mounting groove (14) inside, the aluminum structural frame (7) has multiple first mounting holes (12) at each of its four corners, and the two splicing pieces (8) have symmetrical second mounting holes (15) at their upper and lower ends. 3.The touch display module of claim 2, wherein: The back plate (20) is embedded in two splicing parts (8) and an aluminum structural frame (7) and is connected by a mounting plate (9). The mounting plate (9) is fixed to the splicing parts (8) and the aluminum structural frame (7) by fastener threading into the second mounting hole (15). The splicing parts (8) and the aluminum structural frame (7) are connected by an L-shaped connecting plate (10). The L-shaped connecting plate (10) has a first through hole (11) inside which is connected by fastener threading.

4. The touch display module of claim 1, wherein: The aluminum structural frame (7) has four corner connecting plates (17) at its four corners, and the four corner connecting plates (17) have a second through hole (19).

5. The touch display module of claim 1, wherein: The aluminum structural frame (7) has symmetrical hooks (5) on the left and right sides at the rear end. Each of the four hooks (5) has a hook hole (16) inside. The aluminum structural frame (7) has symmetrical fixing holes (18) on the left and right sides at the rear end. The four hooks (5) and the aluminum structural frame (7) are fixed by screws passing through the hook holes (16) and threaded into the fixing holes (18).

6. The touch display module of claim 1, wherein: The backlight assembly (21) includes a routing board (2101), a motherboard (2102), a motherboard battery (2103), a backlight power board (2104), a touch panel (2105), and a power switch (2106).

7. The touch display module of claim 6, wherein: The front end of the housing (2) is provided with a switch button (3), which is electrically connected to the power switch (2106). 8.The touch display module of claim 1, wherein: The backlight in the backlight assembly (21) is fixed to the back side of the liquid crystal display panel (45) by a screen locking strip to prevent displacement or detachment during transportation or use.

9. The touch display module of claim 1, wherein: The aluminum structural frame (7) and the display module (4) are bonded together with 3M adhesive to achieve integrated assembly of the display module (4) and the aluminum structural frame (7), thereby improving the overall structural stability.

10. The touch display module of claim 1, wherein: The glass cover (41) is a 41-inch irregularly shaped cover, and the liquid crystal display panel (45) is a 27-inch OC panel. The two are staggered and bonded by SCA adhesive layer (43) and OCA adhesive layer (44) to adapt to the structural layout of the asymmetrical display area.

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