Preparation method of multi-connected curved surface touch display structure

Abstract

The application provides a preparation method of a multi-coupling curved surface touch display structure, and relates to the technical field of display. The display prepared by the method comprises a multi-coupling curved surface display screen, a display panel, a backlight module, a circuit module and a back cover which are sequentially arranged. In the preparation, the protective cover glass is first heat-bent and formed, and then is attached with a flexible touch sensor and a shielding wire mesh to form the multi-coupling curved surface display screen. Then, the multi-coupling curved surface display screen is vacuum-attached with the display panel, and after auxiliary material attachment, optical alignment and glue injection and curing, the display panel is obtained. Then, a plurality of independent backlight modules are respectively locked to the rear part of the display panel to complete front module assembly. Meanwhile, the circuit module is assembled into the back cover and electrical connection is completed to form a rear module. Finally, the front and rear modules are locked and assembled by screws. The preparation method has simple process and high attachment yield, and the modular structure is convenient for independent display and backup, thereby significantly improving production efficiency and maintenance convenience.

Description

Technical Field

[0001] This invention relates to the field of display technology, specifically to a method for fabricating a multi-panel curved touch display structure. Background Technology

[0002] Multi-screen curved touchscreens consist of multiple curved display units that can display independently or collaboratively. They offer advantages such as wide viewing angles and strong 3D effects, and are widely used in automotive, aviation, and high-end commercial display devices. However, the uneven distribution of mechanical stress generated when a curved screen is bent alters the arrangement of liquid crystal molecules within the LCD cell, resulting in significant differences in light transmittance across different areas and easily causing uneven display brightness.

[0003] Currently, curved screens are mainly manufactured using cold bending or hot bending technologies. Cold bending involves fixing a flat module onto a curved base, which is simple to operate but suffers from stress rebound, affecting long-term reliability. Hot bending first heat-bends the cover plate and then attaches the touch sensor and display panel. While there is no rebound, subsequent polishing, screen printing, and bonding must all be performed on the curved surface, making the process complex, with low yield and high cost. Especially for large-size multi-panel curved screens, ensuring alignment accuracy during bonding is difficult, air bubbles are hard to remove, and controlling the pressing force is challenging. Furthermore, existing rigid fixtures cannot adapt to curved surface deformation, leading to frequent bonding defects and severely restricting production efficiency and yield. Summary of the Invention

[0004] 1. The technical problem that the invention aims to solve: This invention provides a method for fabricating a multi-curved touch display structure to solve the technical problems existing in the background art.

[0005] 2. Technical Solution: To achieve the above objectives, the technical solution provided by this invention is: a method for fabricating a multi-panel curved touch display structure, comprising the following steps: The protective cover glass is hot-bent and then bonded together with the touch sensor and the shielding mesh to obtain a multi-panel curved display screen. The multi-curved display screen is vacuum bonded to the display panel to obtain the multi-curved display panel. The multi-curved display panel is combined with the backlight module; Assemble the circuit module with the back cover; The back cover, which is equipped with the circuit module, is assembled with the multi-curved display panel, which is equipped with the backlight module, to obtain a multi-curved touch display.

[0006] Furthermore, the protective cover glass is a flat glass, which has multiple display areas and a connecting area between adjacent display areas, and the display areas and the connecting area are integrally connected.

[0007] Furthermore, the touch sensor is a flexible touch sensor, which is attached to the surface of the protective cover glass.

[0008] Furthermore, before vacuum bonding the multi-screen curved display to the display panel, insulating foam is applied to the outer periphery of the effective display area of ​​the display panel, electromagnetic shielding cloth is applied to the edge of the shielding mesh, and omnidirectional conductive foam is applied to the inner side of the edge of the protective cover glass.

[0009] Furthermore, the insulating foam is attached to the outer edge of the effective display area of ​​the display panel, the electromagnetic shielding cloth is attached to the edge of the shielding mesh and extends to the edge of the protective cover glass, and the omnidirectional conductive foam is attached between the insulating foam and the edge of the shielding mesh.

[0010] Furthermore, when vacuum bonding the multi-panel curved display screen to the display panel, the multi-panel curved display screen and the display panel are optically aligned so that the multi-panel curved display screen is located in the central area of ​​the display panel. Adhesive is injected into the gap between the multi-panel curved display screen and the display panel and allowed to cure.

[0011] According to claim 1, a method for preparing a multi-curved touch display structure is characterized in that: the adhesive is injected by inserting a needle into the gap and injecting the first adhesive circumferentially; after curing, a second adhesive is injected into the external gap between the multi-curved display screen and the display panel and cured again.

[0012] Furthermore, the light guide plate, optical film, and backlight are assembled in the backlight frame to form a single backlight module, and multiple backlight modules are respectively locked and assembled with the multi-panel curved display panel.

[0013] Furthermore, the circuit module includes a touch panel, a circuit board module, and a power board. The touch panel, the circuit board module, and the power board are respectively installed in the back cover, and the electrical connections between the modules are completed through wires.

[0014] Furthermore, each display unit of the multi-panel curved display panel is independently equipped with a corresponding backlight module, and each backlight module is independent of the others, while each display unit communicates with the others via wires.

[0015] 3. Beneficial effects: Compared with the prior art, the technical solution provided by this invention has the following advantages: The multi-panel curved touch display manufacturing method provided by this invention pre-bends the protective cover plate into shape before bonding it to the flexible touch sensor and shielding mesh. This avoids alignment deviations and air bubble defects caused by completing all bonding processes in a curved surface, significantly reducing bonding difficulty and improving bonding yield. Simultaneously, this method employs a segmented, modular assembly approach, with each display unit independently mounting its backlight module. Optical alignment and vacuum injection curing are completed before modular assembly, ensuring the consistency and reliability of the overall structure and effectively improving the display unevenness problem caused by curved surface stress.

[0016] Furthermore, this method assembles the front-end display components and back-end circuit components independently, and finally completes the final assembly by screw fastening. The process flow is clear and the operation is simple, which greatly shortens the production cycle and reduces manufacturing costs. The display units are interconnected by wires, and if any screen fails, it can be quickly switched to another screen for backup display. It can also be modularly replaced, which facilitates maintenance and repair, and greatly improves the maintainability and flexibility of the product. Attached Figure Description

[0017] Figure 1 This is a flowchart of the preparation method of the present invention. Detailed Implementation

[0018] To facilitate understanding of the present invention, a more complete description of the invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the invention will be more thorough and complete.

[0019] It should be noted that structures not described in this invention do not involve the design points and improvement directions of this invention, and can all be achieved using existing technologies known to those skilled in the art.

[0020] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0021] See attached document Figure 1 This invention provides a method for fabricating a multi-screen curved touch display structure. The multi-screen curved touch display involved in this method includes a multi-screen curved display screen, a display panel, a backlight module, a circuit module, and a back cover. The specific embodiments of this invention will be described in detail below with reference to the accompanying drawings.

[0022] I. Fabrication of Multi-Screen Curved Display Screens A suitable size of transparent flat glass is selected as the raw material for the protective cover. This flat glass has multiple display areas and connecting areas between adjacent display areas, with the display areas and connecting areas integrally connected. The pre-treated glass sheet is hot-bent to form a predetermined curved shape. Screen printing is then performed on a preset area of ​​the curved protective cover to obtain the curved protective cover glass.

[0023] A flexible touch sensor is attached to the surface of the protective cover glass, adapting the sensor to the shape of the curved cover glass. A shielding mesh is then attached along the touch sensor, assembling the curved touch cover glass assembly. Subsequently, multiple liquid crystal displays are bonded to the touchscreen module using a fixture to obtain the touchscreen assembly.

[0024] II. Application and alignment of auxiliary materials before bonding Insulating foam is applied around the effective display area of ​​the LCD screen of the touch screen assembly. Specifically, insulating foam is applied 1 mm outward from the effective display area of ​​the LCD screen to the edge of the LCD screen. Electromagnetic shielding cloth is applied to the edge of the shielding mesh to the edge of the cover glass. Insulating foam is applied 5 mm inward from the edge of the cover glass, and omnidirectional conductive foam is applied inward from the edge of the insulating foam to the edge of the shielding mesh.

[0025] The prepared touchscreen assembly is optically aligned with the display panel, ensuring the touchscreen assembly is centered within the display panel. After alignment, a flexible needle tip is inserted into a pre-drilled 5mm gap between the touchscreen assembly and the display panel, and the first adhesive is injected around the perimeter using air pressure, ensuring thorough and complete application. Multiple pressure blocks are placed on the top of the touchscreen assembly, and the assembly is allowed to stand for 48 hours to fully cure the first adhesive. Subsequently, a second adhesive is applied to the outer gap between the touchscreen assembly and the display panel, and the assembly is allowed to stand for another 48 hours to cure, resulting in a display panel with the touchscreen bonded to it.

[0026] III. Assembly of Backlight Module The light guide plate, optical film, backlight, and backlight frame are assembled together to obtain a single backlight module. This process is repeated to prepare multiple identical backlight modules, the number of which corresponds to the number of display units in the multi-panel curved display. These multiple backlight modules are then secured to the display panel of the attached touchscreen using screws to obtain the display panel with the assembled backlight modules, thus completing the fabrication of the front-end LCD assembly and obtaining the first module.

[0027] IV. Assembly of Circuit Module and Back Cover Multiple touchpads, multiple circuit board modules, aviation plugs, and power boards are screwed into the back cover. At the same time, wires are used to complete the electrical connection between each circuit module to achieve signal communication between the modules, thus completing the fabrication of the second circuit section and obtaining the second module.

[0028] V. Final Assembly The back cover (second module) containing the circuit module is fastened to the display panel (first module) containing the backlight module around the perimeter with screws, so that the first module and the second module are combined into one unit, and the assembly of the multi-panel curved touch display is finally completed.

[0029] In the above manufacturing method, each display unit of the multi-screen curved display is independently assembled with its corresponding backlight module. Each backlight module is independent of the others, and the display units communicate with each other via wires. This modular assembly method allows each display to operate independently, while allowing for interconnection and switching between screens via wires. If one screen malfunctions, it can be quickly replaced with another screen as a backup, or it can be quickly and modularly replaced using spare parts.

[0030] The above-mentioned preparation method is simple and low-cost, which greatly facilitates and improves the efficiency of assembly. At the same time, by installing the multi-display unit in different areas and modules, the independence of each display unit is ensured, while the overall display system works in a coordinated manner.

[0031] The above-described embodiments are merely illustrative of certain implementations of the present invention, and are described in a relatively specific and detailed manner. However, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements are all within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A method for preparing a multi-catenary curved touch display structure, characterized in that: Includes the following steps: The protective cover glass is hot-bent and then bonded together with the touch sensor and the shielding mesh to obtain a multi-panel curved display screen. The multi-curved display screen is vacuum bonded to the display panel to obtain the multi-curved display panel. The multi-curved display panel is combined with the backlight module; Assemble the circuit module with the back cover; The back cover, which is equipped with the circuit module, is assembled with the multi-curved display panel, which is equipped with the backlight module, to obtain a multi-curved touch display.

2. The method of claim 1, wherein the method further comprises: The protective cover glass is a flat glass with multiple display areas and a connecting area between adjacent display areas, and the display areas and the connecting area are integrally connected.

3. The method for fabricating a multi-panel curved touch display structure according to claim 1, characterized in that: The touch sensor is a flexible touch sensor, which is attached to the surface of the protective cover glass.

4. The method for fabricating a multi-panel curved touch display structure according to claim 1, characterized in that: Before vacuum bonding the multi-screen curved display to the display panel, the process includes attaching insulating foam to the outer periphery of the effective display area of ​​the display panel, attaching electromagnetic shielding cloth to the edge of the shielding mesh, and attaching omnidirectional conductive foam to the inner side of the edge of the protective cover glass.

5. The method for fabricating a multi-panel curved touch display structure according to claim 1, characterized in that: The insulating foam is attached to the outer edge of the effective display area of ​​the display panel, the electromagnetic shielding cloth is attached to the edge of the shielding mesh and extends to the edge of the protective cover glass, and the omnidirectional conductive foam is attached between the insulating foam and the edge of the shielding mesh.

6. The method for fabricating a multi-panel curved touch display structure according to claim 1, characterized in that: When vacuum bonding the multi-panel curved display screen to the display panel, the multi-panel curved display screen and the display panel are optically aligned so that the multi-panel curved display screen is in the central area of ​​the display panel. Adhesive is injected into the gap between the multi-panel curved display screen and the display panel and allowed to cure.

7. The method for fabricating a multi-panel curved touch display structure according to claim 1, characterized in that: The adhesive is injected as follows: a needle is inserted into the gap, and the first adhesive is injected circumferentially. After curing, a second adhesive is injected into the outer gap between the multi-panel curved display screen and the display panel and cured again.

8. The method for fabricating a multi-panel curved touch display structure according to claim 1, characterized in that: The light guide plate, optical film and backlight are assembled in the backlight frame to form a single backlight module, and multiple backlight modules are respectively locked and assembled with the multi-panel curved display panel.

9. The method for fabricating a multi-panel curved touch display structure according to claim 1, characterized in that: The circuit module includes a touch panel, a circuit board module, and a power board. The touch panel, the circuit board module, and the power board are respectively installed in the back cover, and the electrical connections between the modules are completed through wires.

10. The method for fabricating a multi-panel curved touch display structure according to claim 1, characterized in that: Each display unit of the multi-panel curved display panel is independently equipped with a corresponding backlight module. Each backlight module is independent of the others, and each display unit communicates with the others via wires.

Images