Separation device and method for polarizing film on waste liquid crystal panel

Abstract

The invention relates to the technical field of waste liquid crystal panel separation and recovery treatment, and discloses a separation device and method for a polarizing film on a waste liquid crystal panel, and the separation device comprises a working table, a laser polarization separation mechanism, a movable support mechanism and a scraper knife automatic collection mechanism; a clamp is installed on the working table top and used for fixing a liquid crystal panel. The laser polarization separation mechanism comprises a light source assembly and a laser galvanometer cleaning head, and the light source assembly is electrically connected with the laser galvanometer cleaning head; the laser galvanometer cleaning head faces the liquid crystal panel; the movable support mechanism is installed between the working table and the light source assembly, and the laser galvanometer cleaning head is installed at the movable end of the movable support mechanism. And the automatic scraper knife collecting mechanism is mounted on the working table. According to the device, automatic separation of the polarizing film and the glass substrate in the waste liquid crystal panel is achieved, the whole process is efficient and low in pollution, the recycling treatment cost of the liquid crystal panel is reduced, and meanwhile the disassembling efficiency is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of waste liquid crystal panel separation and recycling technology, and in particular to a device and method for separating polarizing film on waste liquid crystal panels. Background Technology

[0002] With the rapid development of the electronics and information industry, LCD monitors are widely used in numerous electronic devices such as televisions, computers, and mobile phones. Every year, a large number of newly manufactured LCD panels enter the market, but these panels generally have a short lifespan, resulting in a massive amount of discarded LCD panels. If not properly disposed of, this can cause serious environmental pollution. Furthermore, the complex structure and lack of standardized design of LCD panels make automated disassembly extremely difficult, relying heavily on inefficient manual operation. Therefore, the harmless disposal and resource utilization of LCD panels have attracted considerable attention, and how to handle these discarded LCD panels has become an urgent problem to be solved.

[0003] The polarizing film, adhered to the glass by adhesive, is one of the challenges in recycling LCD panels. Existing technologies include several methods for separating the polarizing film from LCD panels, primarily thermal treatment and chemical treatment. However, these methods have several drawbacks. For example, the high temperatures of thermal treatment may decompose organic components, generating waste gas; chemical treatment presents challenges related to solvent recovery and secondary pollution. Regardless of whether heating, solvents, or mechanical methods are used, they all suffer from high energy consumption, high costs, and the potential to generate toxic waste gas and wastewater or contaminate the glass surface, posing significant obstacles to subsequent recycling.

[0004] To address this, a device and method for separating polarizing film from waste liquid crystal panels are proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a device and method for separating polarizing film on waste liquid crystal panels, aiming to solve or improve at least one of the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides a separation device for polarizing film on waste liquid crystal panels, comprising: A worktable surface, on which a clamp is installed for fixing an LCD panel; A laser polarization separation mechanism includes a light source assembly and a laser galvanometer cleaning head, wherein the light source assembly is electrically connected to the laser galvanometer cleaning head; the laser galvanometer cleaning head faces the liquid crystal panel. A movable support mechanism is installed between the worktable and the light source assembly, and the laser galvanometer cleaning head is installed at the movable end of the movable support mechanism; An automatic scraper collection mechanism is installed on the worktable and is used to scrape off the polarizing film on the surface of the liquid crystal panel.

[0007] According to the present invention, a device for separating polarizing film on a waste liquid crystal panel is provided. The laser galvanometer cleaning head includes a mounting base, which is fixedly installed on the moving end of the movable support mechanism. An infrared positioning device and a laser emission hole are installed on the mounting base. The laser emission hole is electrically connected to the light source assembly. The laser emission hole is perpendicular to the top surface of the worktable and faces the liquid crystal panel.

[0008] According to the present invention, a device for separating polarizing film on a waste liquid crystal panel is provided. The light source assembly includes a laser light source and a connecting conduit. The laser light source is electrically connected to the laser light emission hole through the connecting conduit. The movable support mechanism is installed between the worktable and the laser light source.

[0009] According to the present invention, a device for separating polarizing film on waste liquid crystal panels is provided. The movable support mechanism includes a guide rail and a fixed support. The guide rail is arranged laterally between the worktable and the laser light source. The fixed support is installed at the movable end of the guide rail, and the mounting base is fixedly installed on the top of the fixed support.

[0010] According to the present invention, a device for separating polarizing film on waste liquid crystal panels is provided, wherein the automatic collection mechanism includes an electric robotic arm and a collection shovel, the electric robotic arm is mounted on the worktable, and the collection shovel is mounted on the output end of the electric robotic arm.

[0011] According to the present invention, a device for separating polarizing film on waste liquid crystal panels is provided, wherein the electric robotic arm is a six-axis robotic arm; The angle between the collecting shovel and the top surface of the workbench is 20° to 40°. The thickness of the collecting shovel is 0.5cm to 2cm; The length of the collecting shovel is 10cm to 30cm; The width of the collecting shovel is 1cm to 3cm.

[0012] According to the present invention, a device for separating polarizing film on waste liquid crystal panels is provided, wherein the clamp adopts a fixed gripper.

[0013] This invention also provides a method for separating polarizing film from waste liquid crystal panels, comprising the following steps: Step 1: Fix the discarded LCD panel with the backlight module and bezel removed onto the fixture on the workbench. Step 2: Control the moving support mechanism to move the laser galvanometer cleaning head of the laser polarization separation mechanism to above the surface of the liquid crystal panel, start the laser polarization separation mechanism, emit laser to scan and irradiate the polarization film of the liquid crystal panel, and dissolve the adhesive layer between the polarization film of the liquid crystal panel and the glass substrate through high temperature. Step 3: Control the automatic scraper collection mechanism to scrape the surface of the laser-treated LCD panel and collect the peeled polarizing film. Step 4: Reset the automatic scraper collection mechanism, loosen the clamp, flip the LCD panel and fix it again; Step 5: Repeat steps 2 and 3 to separate the polarizing film on the other side of the LCD panel.

[0014] According to the present invention, a method for separating polarizing film on a waste liquid crystal panel is provided, wherein in step two, the laser emission power is 80W to 120W.

[0015] According to the present invention, in a method for separating polarizing film on a waste liquid crystal panel, in step two, the time for scanning and irradiating the polarizing film of the liquid crystal panel with a laser is 8 to 12 seconds.

[0016] The present invention discloses the following technical effects: In operation, this invention places the LCD panel with the backlight module and bezel removed in a fixture, activates a laser polarization separation mechanism to emit a laser to dissolve the polarizing film at high temperature, and then uses an automatic scraper collection mechanism to completely separate the polarizing film. After separation, the device is reset, the LCD panel is flipped over, and the above process is repeated to remove the remaining polarizing film. This invention achieves automated separation of the polarizing film from the glass substrate in waste LCD panels. The entire process is highly efficient and low-pollution, which not only reduces the recycling cost of LCD panels but also greatly improves the dismantling efficiency. In practical applications, this invention can efficiently and environmentally process large quantities of waste LCD panels, effectively separating the polarizing film. The separation time is significantly shorter than traditional methods, and the glass substrate is not damaged during the separation process, ensuring the efficiency of subsequent recycling. It is both efficient and environmentally friendly. This invention can efficiently and quickly separate the polarizing film without generating chemical waste liquid and with low energy consumption and low pollution. It can achieve virtually zero investment in subsequent dismantling work, greatly reducing processing costs and improving processing efficiency. It has the advantages of high automation and low pollution, making it an effective way to recycle polarizing film from LCD panels on a large scale and with broad application prospects. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the laser polarization separation mechanism in this invention; Figure 3 This is a schematic diagram of the movable support mechanism in this invention; Figure 4 This is a schematic diagram of the guide rail structure in this invention; Figure 5 This is a schematic diagram of the automatic shovel collection mechanism in this invention; Figure 6 This is a schematic diagram of the workbench structure in this invention; Figure 7 This is a schematic diagram of the structure of the fixed gripper in this invention.

[0019] Among them, 1. Laser polarization separation mechanism; 11. Laser source; 12. Connecting conduit; 13. Laser galvanometer cleaning head; 131. Infrared positioning device; 132. Laser light output hole; 2. Moving support mechanism; 21. Guide rail; 22. Fixed support; 3. Automatic scraper collection mechanism; 31. Electric robotic arm; 32. Scraper collection; 4. Worktable; 41. Fixed gripper. 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 skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Reference Figures 1-7 This invention provides a device for separating polarizing film from waste liquid crystal panels, comprising: Worktable 4, with a clamp installed on the worktable 4, the clamp is used to fix the LCD panel; The laser polarization separation mechanism 1 includes a light source assembly and a laser galvanometer cleaning head 13. The light source assembly is electrically connected to the laser galvanometer cleaning head 13. The laser galvanometer cleaning head 13 faces the liquid crystal panel. The movable support mechanism 2 is installed between the worktable 4 and the light source assembly, and the laser galvanometer cleaning head 13 is installed at the movable end of the movable support mechanism 2. Automatic scraper collection mechanism 3 is installed on the workbench 4 and is used to scrape off the polarizing film on the surface of the LCD panel. With this configuration, during operation, the present invention places the LCD panel with the backlight module and bezel removed in a fixture, activates the laser polarization separation mechanism 1 to emit a laser to dissolve the polarization film at high temperature, and then uses the scraper automatic collection mechanism 3 to completely separate the polarization film. After separation, the device is reset, the LCD panel is flipped over, and the above process is repeated to remove the remaining polarization film. The present invention achieves automated separation of the polarization film from the glass substrate in waste LCD panels. The whole process is efficient and low-pollution, which not only reduces the recycling cost of LCD panels, but also greatly improves the dismantling efficiency. In practical applications, this invention can efficiently and environmentally process large quantities of waste LCD panels, effectively separating the polarizing film. The separation time is significantly shorter than traditional methods, and the glass substrate is not damaged during the separation process, ensuring the efficiency of subsequent recycling. It is both efficient and environmentally friendly. This invention can efficiently and quickly separate the polarizing film without generating chemical waste liquid and with low energy consumption and low pollution. It can achieve virtually zero investment in subsequent dismantling work, greatly reducing processing costs and improving processing efficiency. It has the advantages of high automation and low pollution, making it an effective way to recycle polarizing film from LCD panels on a large scale and with broad application prospects.

[0023] Further optimization of the solution: the laser galvanometer cleaning head 13 includes a mounting base, which is fixedly installed on the moving end of the movable support mechanism 2; an infrared positioning device 131 and a laser emission hole 132 are installed on the mounting base, the laser emission hole 132 is electrically connected to the light source assembly, the laser emission hole 132 is set perpendicular to the top surface of the worktable 4, and the laser emission hole 132 faces the LCD panel. During operation, the infrared positioning device 131 is activated first to accurately locate the area covered by the polarizing film on the LCD panel and transmits the positioning data to the control system, providing a precise path for laser scanning. Subsequently, the laser emitting aperture 132 receives the laser light through its electrical connection with the light source assembly. Since the laser emitting aperture 132 is perpendicular to the top surface of the worktable 4 and faces the LCD panel, it ensures that the laser irradiates the polarizing film surface perpendicularly, improving the utilization rate of laser energy and allowing the polarizing film to be uniformly heated and dissolved. This avoids insufficient local dissolution or damage to the glass substrate caused by laser refraction, further improving separation accuracy.

[0024] The scheme is further optimized. The light source component includes a laser light source 11 and a connecting conduit 12. The laser light source 11 is electrically connected to the laser light output hole 132 through the connecting conduit 12. The movable support mechanism 2 is installed between the worktable 4 and the laser light source 11. During operation, the laser source 11 activates to generate infrared laser with preset parameters, which is stably transmitted to the laser output port 132 via the connecting conduit 12, ensuring minimal energy loss during transmission. Since the movable support mechanism 2 is installed between the worktable 4 and the laser source 11, the connecting conduit 12 can accommodate the movement of the movable support mechanism 2, preventing interruptions or deviations in laser transmission due to support movement, thus ensuring the continuity and stability of the laser dissolving operation.

[0025] The scheme is further optimized. The mobile support mechanism 2 includes a guide rail 21 and a fixed support 22. The guide rail 21 is horizontally arranged between the worktable 4 and the laser source 11. The fixed support 22 is installed at the moving end of the guide rail 21, and the mounting base is fixedly installed on the top of the fixed support 22. During operation, the control system drives the moving end of the guide rail 21 to move the fixed bracket 22 precisely in the horizontal direction, which in turn drives the laser galvanometer cleaning head 13 to move horizontally in sync. In conjunction with the scanning action of the laser light output hole 132, it can achieve full scanning coverage of the polarizing film of LCD panels of different sizes, ensuring that the laser dissolution has no dead angles and improving the adaptability of the device to LCD panels of different specifications.

[0026] The scheme is further optimized. The automatic shovel collection mechanism 3 includes an electric robotic arm 31 and a collecting shovel 32. The electric robotic arm 31 is installed on the worktable 4, and the collecting shovel 32 is installed at the output end of the electric robotic arm 31. During operation, after the laser dissolves the polarizing film, the control system drives the electric robotic arm 31 to move the collecting scraper 32 to a preset position on the surface of the LCD panel. Then, the collecting scraper 32 is controlled to adhere to the surface of the polarizing film and perform a scraping operation. During the scraping process, the electric robotic arm 31 can precisely control the movement trajectory and scraping force of the collecting scraper 32 to ensure that the dissolved polarizing film is completely removed, while avoiding excessive force that could damage the glass substrate.

[0027] Further optimizing the design, the electric robotic arm 31 adopts a six-axis robotic arm; it has multiple degrees of freedom for flexible rotation and movement, and can accurately adapt to the scraping needs of different areas of the LCD panel, especially suitable for scraping polarizing film in irregular sizes or edge areas, improving the comprehensiveness and accuracy of scraping.

[0028] The angle between the scraper 32 and the top surface of the worktable 4 is 20° to 40°; in this embodiment, it is preferably 30°. This angle allows the scraper blade to better fit the separation interface between the polarizing film and the glass substrate, improving scraping efficiency while reducing friction on the glass substrate. The thickness of the collecting shovel 32 is 0.5cm to 2cm; in this embodiment, it is preferably 1cm. The length of the collecting scraper 32 is 10cm to 30cm; in this embodiment, it is preferably 20cm. The length of the collecting scraper 32 is related to the placement position of the LCD panel. Before fixing the LCD panel to the clamp on the worktable 4, it is necessary to ensure that the LCD panel is placed in the correct orientation. Taking a common rectangular LCD panel as an example, its long side should be roughly parallel to the length direction of the worktable 4, and its short side should be roughly parallel to the width direction, with the side that needs to be processed first facing upwards. This placement facilitates the subsequent comprehensive scanning of the laser galvanometer cleaning head 13 along the preset path, ensuring that the polarizing film is fully dissolved. On the other hand, it also facilitates the precise scraping of the automatic scraper collection mechanism 3, improving the efficiency and quality of polarizing film separation and ensuring the smooth progress of the entire separation process.

[0029] The width of the collecting shovel 32 is 1cm to 3cm; in this embodiment, it is preferably 2cm. The design was further optimized by employing a fixed gripper 41. During operation, after the pre-processed LCD panel is placed on the worktable 4, the control system drives the fixed gripper 41 to precisely clamp the edge area of ​​the LCD panel, preventing obstruction of the polarizing film separation area. The clamping force of the fixed gripper 41 can be precisely adjusted, ensuring that the LCD panel does not shift during separation, guaranteeing the accuracy of laser scanning and scraping operations, while also preventing excessive clamping force from damaging the glass substrate, thus improving the stability and safety of panel fixation.

[0030] The design has been further optimized, and the dimensions of workbench 4 are now 60 mm. The fixed gripper is 100cm long and its fixed width can be adjusted from 16-36cm. The clamping force is 1-10N. A collecting shovel controlled by a 6-DOF robotic arm is installed in front of the fixed gripper. The robotic arm has a power of 200W and the shovel extends at a speed of 2cm / s.

[0031] The design was further optimized so that the worktable 4 and the guide rail 21 are parallel.

[0032] This invention also provides a method for separating polarizing film from waste liquid crystal panels, comprising the following steps: Step 1: Fix the discarded LCD panel with the backlight module and bezel removed onto the fixture on the worktable 4. Step 2: Control the moving support mechanism 2 to move the laser galvanometer cleaning head 13 of the laser polarization separation mechanism 1 to above the surface of the liquid crystal panel, start the laser polarization separation mechanism 1, emit laser to scan and irradiate the polarization film of the liquid crystal panel, and make the adhesive layer between the polarization film of the liquid crystal panel and the glass substrate fail by high temperature dissolution. Step 3: Control the automatic scraper collection mechanism 3 to scrape the surface of the laser-treated LCD panel and collect the peeled polarizing film. Step 4: Reset the automatic scraper collection mechanism 3, loosen the clamp, flip the LCD panel and fix it again; Step 5: Repeat steps 2 and 3 to separate the polarizing film on the other side of the LCD panel.

[0033] Further optimization of the scheme: in step two, the laser emission power is 80W to 120W. This power range can accurately match the high-temperature dissolution requirements of the polarizing film. If the power is too low, the polarizing film will not dissolve sufficiently and will not be able to effectively destroy the adhesive layer. If the power is too high, it may damage the glass substrate.

[0034] Further optimizing the scheme, in step two, the laser is emitted to scan and irradiate the polarizing film of the LCD panel for 8 to 12 seconds. This ensures that the polarizing film is completely dissolved while avoiding thermal damage to the glass substrate caused by prolonged high-temperature irradiation, thereby further improving the safety and efficiency of separation and making the separation process more controllable.

[0035] Example 1 In this embodiment, the BOE HT150X02-100 EcoZB LCD panel is separated by fixing the discarded LCD panel with the backlight module and bezel removed onto the fixture on the worktable 4. The control mechanism 2 moves the laser galvanometer cleaning head 13 of the laser polarization separation mechanism 1 to above the surface of the liquid crystal panel. The laser polarization separation mechanism 1 is activated, and a laser is emitted to scan and irradiate the polarization film of the liquid crystal panel. The adhesive layer between the polarization film and the glass substrate of the liquid crystal panel is rendered ineffective by high temperature dissolution. The laser source 11 starts working, and the laser emission aperture 132 emits a laser with a power of 80W. At the same time, the laser galvanometer cleaning head 13 scans one edge of the polarization film. The scanning lasts for 12 seconds. The automatic scraper collection mechanism 3 scrapes the surface of the laser-treated LCD panel to collect the peeled polarizing film. The automatic scraper collection mechanism 3 is reset, the clamp is released, the LCD panel is flipped over and then fixed again; Repeat the above process to separate the polarizing film on the other side of the LCD panel. After separation, the grippers are released, and the glass substrate is removed. The separation rate of the polarizing film reaches 98.6% throughout the process.

[0036] Example 2 The difference between this embodiment and embodiment 1 is that the laser output hole 132 emits a laser with a power of 100W, and at the same time the laser galvanometer cleaning head 13 scans one edge of the polarizing film, and the scanning lasts for 12 seconds. The separation rate of the polarizing film reached 96.5% throughout the process.

[0037] Example 3 The difference between this embodiment and embodiment 1 is that the laser output hole 132 emits a laser with a power of 120W, and at the same time the laser galvanometer cleaning head 13 scans one edge of the polarizing film, and the scanning lasts for 12 seconds. The separation rate of the polarizing film reached 91.2% throughout the process.

[0038] Example 4 The difference between this embodiment and embodiment 1 is that the laser output hole 132 emits a laser with a power of 120W, and at the same time the laser galvanometer cleaning head 13 scans one edge of the polarizing film, and the scanning lasts for 8 seconds. The separation rate of the polarizing film reached 93.4% throughout the process.

[0039] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0040] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A device for separating polarizing film from waste liquid crystal panels, characterized in that, include: A worktable (4) is provided with a clamp for fixing a liquid crystal panel. A laser polarization separation mechanism (1) is provided, comprising a light source assembly and a laser galvanometer cleaning head (13), wherein the light source assembly is electrically connected to the laser galvanometer cleaning head (13); the laser galvanometer cleaning head (13) faces the liquid crystal panel. A movable support mechanism (2) is installed between the workbench (4) and the light source assembly, and the laser galvanometer cleaning head (13) is installed at the movable end of the movable support mechanism (2). Automatic scraper collection mechanism (3) is installed on the worktable (4) and is used to scrape off the polarizing film on the surface of the liquid crystal panel.

2. The device for separating polarizing film on waste liquid crystal panels according to claim 1, characterized in that: The laser galvanometer cleaning head (13) includes a mounting base, which is fixedly installed on the moving end of the movable support mechanism (2); an infrared positioning device (131) and a laser light emission hole (132) are installed on the mounting base. The laser light emission hole (132) is electrically connected to the light source assembly. The laser light emission hole (132) is perpendicular to the top surface of the worktable (4) and faces the liquid crystal panel.

3. The device for separating polarizing film on waste liquid crystal panels according to claim 2, characterized in that: The light source assembly includes a laser light source (11) and a connecting conduit (12). The laser light source (11) is electrically connected to the laser light output hole (132) through the connecting conduit (12). The movable support mechanism (2) is installed between the worktable (4) and the laser light source (11).

4. The device for separating polarizing film on waste liquid crystal panels according to claim 3, characterized in that: The movable support mechanism (2) includes a guide rail (21) and a fixed support (22). The guide rail (21) is arranged horizontally between the worktable (4) and the laser light source (11). The fixed support (22) is installed at the movable end of the guide rail (21). The mounting seat is fixedly installed on the top of the fixed support (22).

5. The device for separating polarizing film on waste liquid crystal panels according to claim 1, characterized in that: The automatic shovel collection mechanism (3) includes an electric mechanical arm (31) and a collecting shovel (32). The electric mechanical arm (31) is mounted on the worktable (4), and the collecting shovel (32) is mounted on the output end of the electric mechanical arm (31).

6. The device for separating polarizing film on waste liquid crystal panels according to claim 5, characterized in that: The electric robotic arm (31) is a six-axis robotic arm; The angle between the collecting shovel (32) and the top surface of the workbench (4) is 20° to 40°. The thickness of the collecting shovel (32) is 0.5cm to 2cm; The length of the collecting shovel (32) is 10cm to 30cm; The width of the collecting shovel (32) is 1cm to 3cm.

7. The device for separating polarizing film on waste liquid crystal panels according to claim 1, characterized in that: The clamp uses a fixed jaw (41).

8. A method for separating polarizing film from waste liquid crystal panels, based on the apparatus for separating polarizing film from waste liquid crystal panels according to any one of claims 1-7, characterized in that, Includes the following steps: Step 1: Fix the discarded LCD panel with the backlight module and frame removed onto the fixture on the workbench (4); Step 2: Control the moving support mechanism (2) to move the laser galvanometer cleaning head (13) of the laser polarization separation mechanism (1) to the surface above the liquid crystal panel, start the laser polarization separation mechanism (1), emit laser to scan and irradiate the polarization film of the liquid crystal panel, and make the bonding layer between the polarization film of the liquid crystal panel and the glass substrate fail by high temperature dissolution. Step 3: Control the automatic collection mechanism of the scraper (3) to scrape the surface of the LCD panel after laser treatment and collect the peeled polarizing film; Step 4: Reset the automatic scraper collection mechanism (3), loosen the clamp, flip the LCD panel and fix it again; Step 5: Repeat steps 2 and 3 to separate the polarizing film on the other side of the LCD panel.

9. The method for separating the polarizing film on a waste liquid crystal panel according to claim 8, characterized in that: In step two, the laser emission power is 80W to 120W.

10. The method for separating the polarizing film on a waste liquid crystal panel according to claim 8, characterized in that: In step two, the laser is emitted to scan and irradiate the polarizing film of the liquid crystal panel for 8 to 12 seconds.

Images