Flexible display screen surface film coating device

Abstract

The utility model relates to the technical field of film coating equipment, concretely is a kind of flexible display screen surface laminating device.The device is constituted by case, positioning table, work plate and drive assembly, case is equipped with slide rail and connecting through-hole, positioning table is slidably matched with slide rail by sliding block, and the vacuum suction port on its surface and filter membrane realize flexible display screen stable fixation and protection;Work plate integrates coating spout and brush roll, and realizes rotary switching with the cooperation of servo motor A, servo motor B drives screw rod to drive positioning table to slide, and completes "spraying-roller pressing" integrated film coating.The device is uniformly coated by accurate positioning and roller pressing, improves film coating uniformity, guarantees flexible display screen quality, has the operation convenience and equipment durability, and is suitable for flexible display screen large-scale production.

Description

Technical Field

[0001] This utility model relates to the technical field of coating equipment, specifically a coating device for the surface of a flexible display screen. Background Technology

[0002] With the development of technology, electronic products with displays, such as mobile phones and televisions, are evolving towards being lighter, thinner, and easier to store. Flexible displays are display devices made of soft materials that can be deformed and bent. Extremely thin and light, like paper, they are also known as "electronic paper." Their deformability makes them a novel device applicable to various scenarios, such as foldable phones. Due to the bendable nature of flexible displays, traditional protective films are insufficient. The coating must be flexible and not break when folded, allowing it to adapt to bending. Currently, most coatings for flexible displays are applied using a spraying method. The coating material is dissolved in a solvent and sprayed onto the surface of the flexible display. Subsequent processing leaves a coating structure on the surface.

[0003] However, existing coating equipment using spraying methods suffers from several drawbacks. First, it results in uneven coating thickness distribution, affecting the quality of the flexible display screen. Thicker areas exhibit reduced light transmittance and are prone to dark spots, while thinner areas lack sufficient wear resistance and are easily scratched. Second, existing equipment suffers from poor positioning and fixation, often relying on mechanical clamps. This method has significant limitations: the clamping force is difficult to control precisely; excessive force can cause edge deformation and damage, while insufficient force fails to provide effective fixation, leading to screen displacement and further exacerbating the uneven coating thickness. Third, during the spraying process, atomized coating liquid that doesn't adhere to the display surface ("overspraying") diffuses into the equipment, some settling on or inside critical structural surfaces, forming sticky dirt. Long-term accumulation can lead to jamming and wear, affecting the equipment's operational accuracy and lifespan.

[0004] Therefore, developing a flexible display screen surface coating device that can solve core problems such as "uneven thickness" and "unstable positioning" has become an urgent need in the industry. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a flexible display screen surface coating device, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a flexible display screen surface coating device, comprising a chassis, a positioning platform, and a working plate; characterized in that: the upper surface of the chassis has two symmetrically arranged slide rails, with a connecting through hole running left and right between the two slide rails; the lower part of the positioning platform has several symmetrically arranged sliders, which match the slide rails and form a sliding structure; the upper surface of the positioning platform has several vacuum suction ports evenly distributed; the left side of the working plate is connected to a brush roller via a rotating shaft in a front-back direction, and the right side is fixed to a rotating shaft in a front-back direction and connected to the working table via a vertical bracket; the lower surface of the working plate has several paint spray nozzles evenly distributed.

[0007] Preferably, the positioning platform is provided with a number of air pipe interfaces; the upper surface of the work plate is provided with a number of coating interfaces.

[0008] Preferably, the working board's rotating shaft is connected to a servo motor.

[0009] Preferably, the connecting through hole is provided with a matching nut block and the two form a sliding structure. The upper surface of the nut block is fixed on the positioning platform, and the lower part is matched and connected with a lead screw, and the two form a lead screw and nut structure. The lead screw is connected to a servo motor B.

[0010] Preferably, the upper surface of the positioning platform is provided with a filter membrane.

[0011] Preferably, the chassis is equipped with a display panel, an emergency stop button, and a power switch.

[0012] This utility model provides a flexible display screen surface coating device, which has the following beneficial effects: 1. The device innovatively adopts an integrated design of "spraying + rolling," combining the two processes of "spraying" and "rolling" on the same work plate. In the spraying stage, preliminary coating is achieved through evenly distributed paint nozzles. In the rolling stage, a servo motor drives the positioning table to slide at a uniform speed. Combined with the adhesion characteristics of the brush rollers, the coating thickness deviation is controlled to a very low level, far superior to existing industry standards. This improvement directly solves problems such as "optical dark spots and folding breakage caused by uneven thickness," reducing the product defect rate of flexible displays and significantly improving product quality and market competitiveness. Simultaneously, the rotation of the work plate enables seamless process transitions, eliminating the need for additional workpiece transfers, reducing positioning errors and time consumption between processes, and greatly improving production continuity and efficiency.

[0013] 2. The vacuum suction port of the positioning stage adopts the "uniform adsorption across the entire area" design. Combined with the protective function of the filter membrane, it not only avoids damage to the flexible display screen caused by traditional mechanical clamps, but also ensures that the display screen is stably fixed and without displacement throughout the process. In addition, the positioning stage can be adapted to flexible display screens of different thicknesses and sizes, which greatly improves the versatility of the equipment and reduces the equipment adjustment time caused by product specification changes.

[0014] 3. The control of servo motor A and servo motor B realizes precise and automated operation of "work plate rotation switching" and "positioning table movement" without manual intervention. This not only reduces the labor intensity of operators, but also avoids errors caused by manual operation, and significantly improves production efficiency. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is the front view of the present invention; Figure 3 for Figure 2 Top view; Figure 4 for Figure 2 The left view; Figure 5 for Figure 3 Sectional view of AA; Figure 6 This is a schematic diagram illustrating the operation of the present invention during material spraying; Figure 7 This is a schematic diagram of the operation of the present invention during roller pressing; In the diagram: 1. Chassis; 101. Slide rail; 102. Connecting through hole; 103. Display panel; 104. Emergency stop button; 105. Power switch; 2. Positioning platform; 201. Slider; 202. Vacuum suction port; 203. Air pipe interface; 204. Filter membrane; 3. Working plate; 301. Rotating shaft; 302. Brush roller; 303. Paint nozzle; 304. Paint interface; 305. Servo motor A; 4. Nut block; 5. Lead screw; 501. Servo motor B. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] In this application, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0018] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0019] Example 1: Please refer to Figures 1 to 7 A flexible display screen surface coating device includes a chassis (1), a positioning platform (2), and a working plate (3). The chassis (1) has two symmetrically arranged slide rails (101) on its upper surface, with a connecting through hole (102) running left-right between the two slide rails (101). The positioning platform (2) has several symmetrically arranged sliders (201) on its lower part. This invention uses four symmetrically arranged sliders (201), with each slide rail (101) connecting two sliders. The sliders (201) match the slide rails (101) and form a sliding structure, providing guidance for the left-right movement of the positioning platform (2), ensuring no deviation or jamming during movement, and guaranteeing the uniformity of subsequent rolling processes. The positioning platform (2) has several vacuum suction ports (202) evenly distributed on its upper surface. The vacuum suction ports (202) can quickly form negative pressure, using atmospheric pressure to tightly adhere the flexible display screen to the surface of the positioning platform (2), achieving a "non-contact" process. The fixed fixture, compared with traditional mechanical clamps, not only avoids damage to the edge of the display screen, but also forms a uniform adsorption force on the entire display screen, preventing wrinkles and displacement, and ensuring the stability of the spraying and rolling process; the left side of the work plate (3) is connected to the brush roller (302) in the front-to-back direction through the rotating shaft (301). The length of the brush roller (302) is adapted to the width of the positioning table (2), ensuring that a single rolling can cover the entire area of ​​the flexible display screen. The coating after spraying is smoothed by uniform rolling, eliminating the problem of uneven thickness and improving the uniformity of the coating; the right side is fixed with the rotating shaft (301) in the front-to-back direction and connected to the worktable through the vertical bracket; the lower surface of the work plate (3) is evenly distributed with several paint nozzles (303), which spray out the coating paint and achieve its uniform distribution.

[0020] The positioning platform (2) is evenly distributed with several air pipe interfaces (203); the upper surface of the working plate (3) is provided with several paint interfaces (304), and this utility model uses two. After the air pipe interface (203) is connected to the external air pump, the vacuum suction port (202) can quickly form a negative pressure, and the adsorption intensity can be adjusted by the air pump to prevent damage to the flexible display screen; the paint interface (304) is connected to the external paint tank through the pipe to realize the continuous supply of coating paint; the specific connection method between the air pipe interface (203)-air pipe-external air pump and the paint interface (304)-pipe-external paint tank will not be shown and described in detail in this embodiment, and users can choose according to their own needs.

[0021] Several flexible displays are laid flat on the positioning platform (2). The vacuum suction port (202) forms a negative pressure, and atmospheric pressure is used to firmly adhere the flexible displays to the surface of the positioning platform (2), completing the stable fixation and positioning without damage or displacement. The working plate (3) rotates around the rotating shaft (301) to a horizontal state, so that the paint nozzle (303) on the lower surface of the working plate (3) faces the flexible display on the positioning platform (2); the paint nozzle (303) sprays the spray liquid evenly onto the surface of the display, completing the initial coating material coating. After the spraying is completed, the working plate (3) is driven to rotate again, so that the brush roller (302) flips to make close contact with the surface of the flexible display; then the positioning platform (2) slides to the left at a constant speed along the slide rail (101). During the movement of the positioning platform (2), the brush roller (302) rolls the coating on the surface of the display in all directions, smoothing out areas with uneven thickness and making the coating thickness evenly distributed. After the positioning platform (2) moves to the left limit position of the slide rail (101), the working plate (3) rotates in the opposite direction to make the brush roller (302) detach from the surface of the display screen; the operator removes the flexible display screen after the film coating is completed and carries out the subsequent curing process to form the final protective film.

[0022] The rotating shaft (301) of the work plate (3) is connected to a servo motor A (305). The servo motor A (305) can precisely control the work plate (3) to rotate around the rotating shaft (301) to achieve precise rotation. When spraying is required, the work plate (3) is driven to rotate to a horizontal state so that the paint nozzle (303) is facing the display screen on the positioning table (2). When rolling is required, the work plate (3) is driven to rotate to an inclined state so that the brush roller (302) is in close contact with the surface of the display screen, realizing the rapid switching between the "spraying" and "rolling" processes without the need for manual adjustment of parts, thus improving production efficiency.

[0023] The connecting through hole (102) is provided with a matching nut block (4) and the two form a sliding structure. The upper surface of the nut block (4) is fixed on the positioning table (2), and the lower part is matched and connected to a lead screw (5) and the two form a lead screw and nut structure. The lead screw (5) is connected to a servo motor B (501). The nut block (4), the lead screw (5) and the servo motor B (501) are all connected inside the machine box (1). The forward and reverse rotation of the servo motor B (501) causes the lead screw (5) to move back and forth, which drives the nut block (4) on it to move back and forth, and then the positioning table (2) slides left and right, ensuring that the positioning table (2) moves at a uniform speed during the rolling process, so that the pressure of the brush roller (302) on the coating is uniform, and further improving the uniformity of the coating thickness.

[0024] The upper surface of the positioning platform (2) is provided with a filter membrane (204), which has the characteristics of "breathable but not impermeable to solids". It allows air to pass through, ensures that the vacuum suction port (202) forms a negative pressure, and blocks the tiny particles and impurities in the spray liquid, preventing them from entering the suction port and causing blockage. At the same time, it prevents the spray liquid from penetrating into the interior of the positioning platform and damaging the components, thus extending the equipment maintenance cycle.

[0025] The chassis (1) is equipped with a display panel (103), an emergency stop button (104), and a power switch (105). These are integrated into the side of the chassis (1) to form a user-friendly operation and control module. The display panel (103) adopts a touch screen design, which can display the equipment operating parameters in real time (such as the positioning table moving speed, spraying pressure, and servo motor speed), and supports one-click parameter modification, making operation convenient. The emergency stop button (104) can immediately cut off the operation of the equipment after being pressed, ensuring rapid shutdown in case of sudden failure. The power switch (105) controls the power supply of the entire device.

[0026] Working process: The operator presses the power switch (105) on the chassis (1), the equipment is powered on and started, the display panel (103) lights up and displays the initial parameter interface. According to the specifications (thickness, size) of the flexible display screen to be coated, the parameters are set through the display panel (103): such as adsorption pressure, spraying pressure, moving speed of the positioning table (2), spraying time, etc. Several flexible display screens are evenly laid on the filter membrane (204) on the upper surface of the positioning table (2), the air pump connected to the air pipe interface (203) is started, the air inside the positioning table (2) is extracted, the vacuum suction port (202) forms a negative pressure, and the flexible display screen is tightly adsorbed and fixed.

[0027] Servo motor A (305) drives the work plate (3) to rotate around the right pivot (301) to a horizontal position, so that the paint nozzle (303) on the lower surface of the work plate (3) faces the flexible display screen; the paint tank connected to the paint interface (304) begins to deliver the spraying liquid, and the paint nozzle (303) sprays the spraying liquid evenly onto the surface of the flexible display screen. After the spraying time reaches the set value, the nozzle stops spraying. Servo motor A (305) drives the work plate (3) to continue to rotate around the right pivot (301), so that the brush roller (302) connected to the left pivot (301) is in close contact with the surface of the flexible display screen. Servo motor B (501) starts rotating forward, driving lead screw (5) to rotate. Lead screw (5) engages with nut block (4), causing positioning table (2) to slide uniformly to the left along slide rail (101) of housing (1) via lower slider (201). During the movement of positioning table (2), brush roller (302) rolls the coating on the surface of the display screen to eliminate uneven thickness. When positioning table (2) slides to the left limit position of slide rail (101), servo motor B (501) stops working; at the same time, servo motor A (305) drives working plate (3) to rotate in the opposite direction around right pivot (301), causing brush roller (302) to detach from the surface of flexible display screen and return to its initial position.

[0028] The air pump stops working, the negative pressure at the vacuum suction port (202) is released, and the operator removes the flexible display screen after the coating is completed and sends it to the subsequent curing process. Several flexible display screens are then evenly laid on the center of the filter membrane (204) on the upper surface of the positioning table (2). The servo motor B (501) drives the lead screw (5) to rotate, causing the positioning table (2) to slide to the right along the slide rail (101) and reset to the initial position. The equipment is ready for the next coating cycle.

[0029] If an emergency occurs during production (such as spray liquid leakage or display screen misalignment), the operator can press the emergency stop button (104) to stop all components from working. After the fault is cleared, the equipment can be restarted.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A flexible display screen surface coating device, comprising a chassis (1), a positioning stage (2), and a working plate (3); characterized in that: The upper surface of the casing (1) has two symmetrical slide rails (101) and a connecting through hole (102) running in a left-right direction between the two slide rails (101); the lower part of the positioning platform (2) has several sliders (201) symmetrically arranged in front and back, the sliders (201) match the slide rails (101) and form a sliding structure; the upper surface of the positioning platform (2) has several vacuum suction ports (202) evenly distributed; the left part of the working plate (3) is connected to a brush roller (302) in the front-back direction through a rotating shaft (301), and the right part is fixed with a rotating shaft (301) in the front-back direction and connected to the working table through a vertical bracket; the lower surface of the working plate (3) has several paint spray nozzles (303) evenly distributed.

2. The flexible display screen surface coating device according to claim 1, characterized in that: The positioning platform (2) is provided with several air pipe interfaces (203); the upper surface of the working plate (3) is provided with several paint interfaces (304).

3. The flexible display screen surface coating device according to claim 1, characterized in that: The working plate (3) has a servo motor A (305) connected to its rotating shaft (301).

4. The flexible display screen surface coating device according to claim 1, characterized in that: The connecting through hole (102) is provided with a matching nut block (4) and the two form a sliding structure. The upper surface of the nut block (4) is fixed on the positioning table (2), and the lower part is matched and connected with a lead screw (5) and the two form a lead screw and nut structure. The lead screw (5) is connected to a servo motor B (501).

5. The flexible display screen surface coating device according to claim 1, characterized in that: The upper surface of the positioning stage (2) is provided with a filter membrane (204).

6. The flexible display screen surface coating device according to claim 1, characterized in that: The chassis (1) is equipped with a display panel (103), an emergency stop button (104) and a power switch (105).

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