Liquid crystal display screen laminating apparatus

Abstract

The application provides a liquid crystal display screen film coating equipment and relates to the technical field of liquid crystal display module processing. The equipment comprises a rack, an in / out feeding assembly, a turnover material taking unit, a film pasting station, a film feeding assembly, a film pasting manipulator, a first visual module, a second visual module and a controller. The second visual module is fixedly installed on the rack and located on the movement path of the film pasting manipulator. The data acquisition mode of the second visual module is that the film pasting manipulator grasps the protective film to a predetermined position to identify the position and posture of the protective film. In this mode, the distance between the protective film and the second visual module is relatively short, and there is no visual interference structure. Therefore, the contour identification effect of the transparent piece is better, and the identification precision is higher.

Description

Technical Field

[0001] This invention relates to the field of liquid crystal display module processing technology, specifically to liquid crystal display screen coating equipment. Background Technology

[0002] The automated coating technology for LCD screens generally adopts positioning technology based on machine vision.

[0003] A typical existing technical solution involves configuring a global vision system. Its workflow is as follows: after the robot arm picks up the display screen workpiece from the conveyor belt, it moves to a fixed imaging position. The vision system performs a one-time positioning of the workpiece, calculates the positional deviation, and guides the robot arm to place it at the film application station. Subsequently, the film application execution mechanism picks up the protective film from the feeding point and, based on the guidance of the same vision system or the preset mechanical coordinates, applies the film to the surface of the workpiece.

[0004] Another improved approach is to configure two vision systems to repeatedly locate and verify the same object (such as a workpiece) at different workstations, or to independently guide the placement and pickup of workpieces and films.

[0005] During the design of the long-term LCD screen coating, the applicant discovered that during the process of the vision module guiding the action of the film application mechanism, due to the low accuracy of the protective film (transparent) outline obtained by the vision module, there is still a large accuracy error in the actual film application operation. The current mainstream optimization method is to perform algorithm compensation, but its effect is not ideal and the economic investment is not low. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a liquid crystal display screen coating device, which solves the problem of low recognition accuracy of the protective film (transparent) by the vision system in existing coating processes.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] LCD screen coating equipment, including a frame; and

[0009] The feeding / discharging components, flipping and picking unit, film application station, film supply components, and film application robot are fixedly installed on the frame according to the process flow direction.

[0010] The first vision module is fixedly installed on the frame, and its field of view covers the material picking position of the feeding / discharging components and the workpiece placement position on the film application station;

[0011] The second vision module is fixedly installed on the frame and located on the motion path of the film-applying robot.

[0012] The controller is connected to the first vision module, the second vision module, the flipping and picking unit, the film-applying robot, and the feeding / discharging components. It is used to receive visual positioning data and control each execution unit to complete the movement.

[0013] Preferably, the second vision module includes a stand fixed to the rack, an image acquisition unit mounted on the stand, and a light source that provides illumination for the image acquisition unit;

[0014] The optical axis of the image acquisition unit moves toward the preset shooting position of the end effector of the film-applying robot to image the protective film being grasped.

[0015] Preferably, it also includes a protective housing fixed to the stand, and the image acquisition unit and the light source are both housed inside the protective housing. The protective housing has a light-transmitting area for the light path to pass through.

[0016] Preferably, the flipping material handling unit is located between the infeed / outfeed assembly and the film application station;

[0017] The flip-over material handling unit is configured as follows:

[0018] In the first direction, the workpiece is picked up from the infeed / outfeed assembly and flipped at least once during the transfer to the lamination station so that the workpiece is placed at the lamination station with the lamination side facing up.

[0019] In the second direction, the film-coated workpiece is picked up from the film-coating station and transferred back to the feed / discharge assembly.

[0020] Preferably, the flipping and picking unit includes:

[0021] Support frame fixed to the machine frame;

[0022] The lifting drive unit is installed on the support frame, and the moving end of the lifting drive unit is connected to the mounting plate.

[0023] The flipping assembly includes a rotary drive fixed to the mounting plate, a rotating shaft driven by the rotary drive to rotate about a horizontal axis, and a swing arm fixedly connected to the rotating shaft. The end of the swing arm is provided with an adsorption actuator for gripping the workpiece.

[0024] Preferably, the film application station includes a support platform fixed to the frame, and the top surface of the support platform is provided with an adsorption area for adsorbing and fixing the workpiece;

[0025] The top of the support platform has a clearance space for the swing arm and the suction actuator at its end to be embedded, so that when the flipping and picking unit places the workpiece at the film application station, the swing arm and the suction actuator can be lowered into the clearance space.

[0026] Preferably, it also includes: a first supplementary lighting element and a second supplementary lighting element;

[0027] The first supplementary light component is fixed to the support platform, and its light emission direction is parallel to the first side of the support platform;

[0028] The second supplementary light component is fixed to the swing arm, and its light emission direction is parallel to the second side of the support platform. The first side of the support platform is perpendicular to the second side.

[0029] Preferably, the frame includes a supporting shell with a working chamber and a structural frame fixed inside the working chamber;

[0030] The feeding / discharging assembly, the flipping and picking unit, the film application station, the film supply assembly, and the second vision module are all installed at the bottom of the working chamber;

[0031] Both the film-applying robotic arm and the first vision module are mounted on the structural frame.

[0032] Preferably, the film-applying robot is a three-axis robot.

[0033] Preferably, the feeding / discharging assembly has a first belt body and a second belt body that are synchronous / asynchronous;

[0034] Two sets of flipping material handling units, two sets of film application stations, two sets of film supply components, two sets of film application robots, and two sets of second vision modules are symmetrically arranged on both sides of the infeed / outfeed components.

[0035] The first vision module can be set to one or two sets.

[0036] This invention provides a liquid crystal display screen coating device. It has the following beneficial effects:

[0037] 1. This invention constructs a dual-closed-loop compensation system by setting up an independent and clearly defined first vision module and a second vision module. The first vision module first accurately positions the workpieces at the material picking position and the film application position, eliminating the positional deviations introduced during the gripping, flipping, and placement of the workpieces. The second vision module performs real-time positioning of the film gripped by the film application robot, eliminating the gripping deviation of the film. Furthermore, the second vision module is fixedly installed on the frame and located on the movement path of the film application robot. The data acquisition method of the second vision module is as follows: when the film application robot grips the protective film and reaches the predetermined position (the position of the second vision module), it identifies the position and posture of the protective film. In this method, since the distance between the protective film and the second vision module is relatively close and there is no visual interference structure, the contour recognition effect of transparent parts (or partially translucent parts) is better and the recognition accuracy is higher. The controller calculates the compensation amount based on the data and drives the film application robot to complete the final application, thereby transforming the random cumulative error of multiple links in traditional equipment into a measurable and compensable systematic error, so that the film application accuracy reaches the sub-millimeter level or even higher.

[0038] 2. This invention, through the design of the orientation of the feeding / discharging components, the flipping and picking unit, the film application station, the film supply component, and the film application robot, integrates the workpiece gripping and returning process into the flipping and picking unit. The film application robot completes the work of gripping single film pieces and applying the film. The two parts can operate independently without interfering with each other, shortening the production cycle time of the film application process and improving the working efficiency of the equipment. Attached Figure Description

[0039] Figure 1 This is a perspective view of the liquid crystal display screen coating device proposed in this invention;

[0040] Figure 2 This is a schematic diagram of the liquid crystal display screen coating equipment proposed in this invention;

[0041] Figure 3 This is a schematic diagram of the dual-station structure of the liquid crystal display screen coating equipment proposed in this invention;

[0042] Figure 4 This is a three-dimensional schematic diagram of the feeding / discharging components, flipping and picking unit, and film application station of the liquid crystal display screen coating equipment proposed in this invention;

[0043] Figure 5 This is a three-dimensional schematic diagram of the flip-up material handling unit and the film application station of the liquid crystal display screen coating equipment proposed in this invention;

[0044] Figure 6 This is a perspective view of the second vision module of the liquid crystal display screen coating device proposed in this invention.

[0045] The components include: 1. Frame; 101. Support housing; 102. Structural frame; 2. Feed / discharge assembly; 2a. First belt body; 2b. Second belt body; 3. Tilting and picking unit; 301. Support frame; 302. Lifting drive component; 303. Mounting plate; 304. Rotation drive component; 305. Rotating shaft; 306. Swing arm; 307. Adsorption actuator; 308. Second supplementary lighting component; 4. Film application station; 401. Support platform; 402. Adsorption area; 403. First supplementary lighting component; 5. Film supply assembly; 6. Film application robot; 7. Second vision module; 701. Stand; 702. Protective housing; 703. Image acquisition unit; 704. Light source; 8. First vision module. Detailed Implementation

[0046] 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.

[0047] like Figures 1-6 As shown, this embodiment of the invention provides a liquid crystal display screen coating equipment for performing coating operations on liquid crystal displays (for ease of description, the term "workpiece" will be used to replace "liquid crystal display screen" below). Specifically, it includes: a frame 1, an infeed / outfeed assembly 2, a flipping and picking unit 3, a film application station 4, a film supply assembly 5, a film application robot 6, a first vision module 8, a second vision module 7, and a controller.

[0048] The feeding / discharging assembly 2, the flipping and picking unit 3, the film application station 4, the film supply assembly 5, and the film application robot 6 are fixedly installed on the frame 1 according to the process flow direction. For example, the specific positions of the feeding / discharging assembly 2 and the film application station 4 are reasonably designed based on the movement range of the flipping and picking unit 3, so that the flipping and picking unit 3 can pick up the workpiece from the feeding / discharging assembly 2, and move the workpiece to the film application station 4 after flipping. As another example, the positions of the film supply assembly 5 and the film application station 4 are reasonably designed based on the movement range of the film application robot 6, so that the film application robot 6 can pick up the protective film from the film supply assembly 5 and manipulate the protective film to complete the film application operation at the film application station 4.

[0049] One possible approach is to position the film application station 4 in the middle, and design the flipping material handling unit 3 and the film application robot 6 around the film application station 4 at a certain angle to avoid motion interference between the flipping material handling unit 3 and the film application robot 6; for example, the flipping material handling unit 3 and the film application robot 6 are located on both sides of the film application station 4, forming a 180° angle between them.

[0050] It is understandable that the flipping and picking unit 3 and the film-applying robot 6 are the actuators, and the first vision module 8 and the second vision module 7 are the eyes of the equipment. The first vision module 8 and the second vision module 7 acquire images, which are then processed by the controller to control the flipping and picking unit 3 and the film-applying robot 6 to move accordingly. The controller can also send control signals to the flipping and picking unit 3 and the film-applying robot 6 according to the predetermined coordinate position to complete visionless control (blind operation).

[0051] For example, the controller controls the film-applying robot 6 to pick up the protective film from the film supply assembly 5 and move it to the film-applying station 4. This can be done based on the coordinate positions of the film supply assembly 5 and the film-applying station 4. Generally, the film supply assembly 5 adopts a roll-to-roll film supply separation structure. Its incoming material is a roll with a release protective film. The film supply assembly 5 peels off the protective film of the incoming material and outputs a single protective film. A sensor is set at the film output position of the film supply assembly 5 to sense the presence of a single protective film and transmit the data to the controller.

[0052] The first vision module 8 is fixedly installed on the frame 1, and its field of view covers the material picking position of the feeding / discharging component 2 and the workpiece placement position on the film application station 4. For example, the first vision module 8 uses an industrial camera with autofocus (Clear Focus, abbreviated as CF) to adapt to the position fluctuations of different batches or models of workpieces after being picked up, ensuring that the image is always clear. When actually installing the first vision module 8, it is preferable to use a bracket to install it at a high position to form an image acquisition unit with a large field of view.

[0053] In one specific design, the feeding / discharging assembly 2 adopts a conveyor belt. The control unit of the feeding / discharging assembly 2 is connected to the first vision module 8. The feeding / discharging assembly 2 has ports for feeding and discharging workpieces. During the process of conveying the workpiece from the feeding end to the discharging end, the first vision module 8 obtains the position of the workpiece on the conveyor belt in real time and stops its action at a position suitable for the flipping and picking unit 3 to grab. The flipping and picking unit 3 then grabs the workpiece, flips it, and sends it into the film-coating station 4. After the film-coated workpiece is placed back onto the conveyor belt, the film-coated workpiece is conveyed out.

[0054] It is understandable that the conveyor belt used in the feeding / discharging assembly 2 is a unidirectional conveyor belt, with the ports for feeding and discharging workpieces located at both ends; or the conveyor belt used in the feeding / discharging assembly 2 is a bidirectional conveyor belt, with the ports for feeding and discharging workpieces located at one end.

[0055] It is understandable that during the lamination process, there may be instances where already laminated workpieces are fed into the infeed / outfeed assembly 2. When the first vision module 8 is identifying workpieces on the infeed / outfeed assembly 2 or on the lamination station 4, it needs to determine whether the workpiece has been laminated.

[0056] The second vision module 7 is fixedly installed on the frame 1, and the second vision module 7 is located on the movement path of the film-applying robot 6, so that the film-applying robot 6 can move the protective film to the position of the second vision module 7. The data acquisition method of the second vision module 7 is as follows: the film-applying robot 6 grasps the protective film and moves it to the predetermined position (the position of the second vision module 7) to identify the position and posture of the protective film. In this way, since the distance between the protective film and the second vision module 7 is relatively close, and there is no structure that causes visual interference, the contour recognition effect of transparent parts (or partially translucent parts) is better and the recognition accuracy is higher. The controller calculates the compensation amount based on the data and drives the film-applying robot 6 to complete the final bonding, thereby transforming the random cumulative error of multiple links in traditional equipment into a measurable and compensable systematic error, so that the film-applying accuracy reaches the sub-millimeter level or even higher.

[0057] The first vision module 8, the second vision module 7, the flipping and picking unit 3, the film-applying robot 6, and the feeding / discharging component 2 are all connected to the controller. The controller is used to receive visual positioning data and control each execution unit to complete the movement.

[0058] Understandably, the first vision module 8 identifies the outline position of the workpiece located at the film application station 4, and the second vision module 7 identifies the outline position of the protective film at a predetermined position. The corresponding processing system of the controller unifies the coordinate system of the two positions and ultimately controls the film application robot 6 to complete the film application operation.

[0059] In one embodiment, such as Figure 6 As shown, the second vision module 7 includes a stand 701 fixed to the frame 1, an image acquisition unit 703 mounted on the stand 701, and a light source 704 that provides illumination for the image acquisition unit 703.

[0060] The stand 701 is mainly used for installation. The image acquisition unit 703 uses an industrial camera with autofocus (Clear Focus, CF) function, which is mainly used to acquire images of the protective film at close range. The image acquisition unit 703 can complete high-quality image acquisition. The light source 704 provides supplementary lighting for image acquisition to ensure image clarity.

[0061] The optical axis of the image acquisition unit 703 moves toward the preset shooting position of the end effector of the film-applying robot 6 to image the protective film being grasped. By acquiring the image in a frontal view, the outline image of the protective film can be acquired more accurately.

[0062] In one embodiment, such as Figure 6 As shown, a protective housing 702 fixed to the stand 701 is also designed. The image acquisition unit 703 and the light source 704 are both housed in the protective housing 702. The protective housing 702 has a light-transmitting area for the light path to pass through.

[0063] It is understood that the protective housing 702 is a cubic housing with an opening at the top (forming a light-transmitting area, or installing a transparent plate), the image acquisition unit 703 is fixedly installed at the bottom of the protective housing 702, and the bottom of the protective housing 702 has a circular hole / transparent part corresponding to the top of the image acquisition unit 703; the light source 704 is fixedly installed inside the cubic housing.

[0064] In one embodiment, such as Figure 4 As shown, the flipping material handling unit 3 is located between the feeding / discharging component 2 and the film application station 4.

[0065] The flipping and picking unit 3 is configured as follows:

[0066] In the first direction, the workpiece is picked up from the feeding / discharging component 2 and flipped at least once during the transfer to the film application station 4, so that the workpiece is placed in the film application station 4 with the film application surface facing up; that is, the transfer of the workpiece from the feeding / discharging component 2 to the film application station 4 is completed for the film application operation.

[0067] In the second direction, the film-coated workpiece is picked up from the film-coating station 4 and transferred to the feed / discharge assembly 2, which means that the workpiece that has completed the film-coating operation is sent back to the film-coating station 4.

[0068] It is understandable that the first and second directions mentioned above are the clockwise and counterclockwise directions of rotation.

[0069] In one embodiment, such as Figure 5 As shown, the flipping and picking unit 3 includes: a support frame 301, a lifting drive component 302, a mounting plate 303, a flipping assembly, and an adsorption actuator 307.

[0070] The support frame 301 is fixed on the frame 1. The lifting drive component 302 is installed on one side of the support frame 301. The moving end of the lifting drive component 302 is connected to the mounting plate 303. The mounting plate 303 and the support frame 301 can be designed with necessary sliding guide structures. The lifting drive component 302 drives the mounting plate 303 to move up and down. The flipping component is installed on the mounting plate 303. The lifting drive component 302 drives the mounting plate 303 and the flipping component to move up and down, and the flipping component can perform flipping actions synchronously.

[0071] The flipping assembly includes a rotary drive 304 fixed to the mounting plate 303, a rotating shaft 305 driven by the rotary drive 304 to rotate around a horizontal axis, and a swing arm 306 fixedly connected to the rotating shaft 305. The end of the swing arm 306 is provided with an adsorption actuator 307 for gripping the workpiece.

[0072] During operation, the lifting drive 302 controls the mounting plate 303 and the tilting assembly to be in a high position. The tilting assembly drives the swing arm 306 to rotate, so that the suction actuator 307 at the end of the swing arm 306 is positioned above the feeding / discharging assembly 2. When the workpiece on the feeding / discharging assembly 2 corresponds to the suction actuator 307, the lifting drive 302 retracts, driving the mounting plate 303 and the tilting assembly to move downwards. The tilting assembly drives the swing arm 306 to move the suction actuator 307 downwards to suction the workpiece. After the workpiece is gripped, the lifting drive 302... The control unit 303 raises the mounting plate 303 and the flipping assembly; the rotation drive 304 drives the rotating shaft 305 to rotate, and the rotating shaft 305 drives the swing arm 306 to rotate (180°), so that the swing arm 306, the suction actuator 307 and the workpiece flip and move synchronously above the film application station 4. The lifting drive 302 controls the mounting plate 303 and the flipping assembly to fall down, so that the film application station 4 also supports the workpiece. Based on the support system jointly formed by the film application station 4 and the suction actuator 307 at the film application station 4, the stable support of the film application operation can be guaranteed.

[0073] In one embodiment, such as Figure 5 As shown, the film application station 4 includes a support platform 401 fixed to the frame 1, and the top surface of the support platform 401 is provided with an adsorption area 402 for adsorbing and fixing the workpiece.

[0074] Furthermore, the top of the support platform 401 is constructed with a clearance space for the swing arm 306 and the adsorption actuator 307 at its end to be embedded, so that when the flipping material handling unit 3 places the workpiece at the film application station 4, the swing arm 306 and the adsorption actuator 307 can be lowered into the clearance space.

[0075] For example, the cross-section of the support platform 401 is square and it is distributed in three groups. Each group of support platforms 401 is distributed in multiple groups along a straight line, thus forming a clearance space between two adjacent support platforms 401. This clearance space is used for the swing arm 306 and the adsorption actuator 307 at its end to be embedded.

[0076] In one embodiment, such as Figure 5 As shown, in order to improve the clarity of the image acquired by the first vision module 8 at the film application station 4, a first supplementary light component 403 and a second supplementary light component 308 are also designed.

[0077] The first supplementary light component 403 is fixed to the support platform 401, and its light emission direction is parallel to the first side of the support platform 401; the second supplementary light component 308 is fixed to the swing arm 306, and its light emission direction is parallel to the second side of the support platform 401, with the first side and the second side of the support platform 401 being perpendicular.

[0078] like Figure 5As shown, the first supplementary lighting element 403 and the second supplementary lighting element 308 are located at the outline of the workpiece, and are used to improve the clarity of the image acquired by the first vision module 8 at the film application station 4.

[0079] In one embodiment, such as Figure 1 As shown, the frame 1 includes a support housing 101 with a working chamber and a structural frame 102 fixed inside the working chamber.

[0080] The feeding / discharging assembly 2, the flipping and picking unit 3, the film application station 4, the film supply assembly 5, and the second vision module 7 are all installed at the bottom of the working chamber; the film application robot 6 and the first vision module 8 are both installed on the structural frame 102.

[0081] This design ensures a reasonable distribution of the components: feeding / discharging assembly 2, flipping and picking unit 3, film application station 4, film supply assembly, film application robot 6, first vision module 8, and second vision module 7. It also enables the first vision module 8 to be positioned at a high position, providing a wide field of view for image acquisition. The film application robot 6 has a larger movement space. With the reasonable design of the above spaces, the movement of each structure is less likely to interfere with each other.

[0082] In one specific embodiment, the film-applying robot 6 is a three-axis robot, which can move in the X / Y / Z axes to achieve movement in space.

[0083] In one specific embodiment, the feed / discharge assembly 2 has a first belt body 2a and a second belt body 2b that are synchronous / asynchronous; as Figure 4 As shown, the first belt body 2a and the second belt body 2b move synchronously and share the same conveyor belt roller at both ends, making the structure simpler.

[0084] Two sets of flipping material handling units 3, two sets of film application stations 4, two sets of film supply components 5, two sets of film application robots 6 and two sets of second vision modules 7 are symmetrically arranged on both sides of the feeding / discharging component 2. One set of first vision modules 8 is provided. The first vision module 8 is for acquiring images with a wide viewing angle, so it can be shared.

[0085] Alternatively, two sets of flipping material handling units 3, two sets of film application stations 4, two sets of film supply components 5, two sets of film application robots 6, two sets of first vision modules 8 and two sets of second vision modules 7 are symmetrically arranged on both sides of the feeding / discharging component 2.

[0086] The design of this structure enables a dual-station structure, meaning that the two sets of flip-feeding units 3, two sets of film-applying stations 4, two sets of film-supplying components 5, and two sets of film-applying robots 6 on both sides can all be used to form a situation where two workpieces are simultaneously coated.

[0087] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A liquid crystal display screen coating equipment, comprising a frame (1), characterized in that, Also includes: The feeding / discharging assembly (2), the flipping and picking unit (3), the film application station (4), the film supply assembly (5), and the film application robot (6) are fixedly installed on the frame (1) according to the process flow direction. The first vision module (8) is fixedly installed on the frame (1). Its field of view covers the material picking position of the feeding / discharging component (2) and the workpiece placement position on the film application station (4). The first vision module (8) acquires the position of the workpiece on the conveyor belt of the feeding / discharging component (2) in real time. The conveyor belt of the feeding / discharging component (2) stops when the workpiece is in a position suitable for the flipping material picking unit (3) to grab. The flipping material picking unit (3) grabs the workpiece, flips it, and sends it into the film application station (4). The second vision module (7) is fixedly installed on the frame (1) and located on the movement path of the film-applying robot (6). The second vision module (7) acquires images in a frontal view manner. The controller is connected to the first vision module (8), the second vision module (7), the flipping and picking unit (3), the film-applying robot (6), and the feeding / discharging component (2) by signal connection, and is used to receive visual positioning data and control each execution unit to complete the movement; The film supply assembly (5) is equipped with a sensor at the film outlet position to sense the presence of a single protective film and transmit the data to the controller. Based on the coordinate position of the film supply assembly (5) and the coordinate position of the film application station (4), the controller controls the film application robot (6) to grab the protective film from the film supply assembly (5) and move it to the film application station (4). The first vision module (8) identifies the outline position of the workpiece located at the film application station (4). When the film application robot (6) that grabs the protective film is in the position of the second vision module (7), it identifies the outline position of the protective film. The corresponding processing system of the controller unifies the outline position of the workpiece and the outline position of the protective film into a unified coordinate system, which is ultimately used to control the film application robot (6) to complete the film application operation.

2. The liquid crystal display screen coating equipment according to claim 1, characterized in that: The second vision module (7) includes a stand (701) fixed to the frame (1), an image acquisition unit (703) mounted on the stand (701), and a light source (704) that provides illumination to the image acquisition unit (703). The optical axis of the image acquisition unit (703) moves toward the end effector of the film-applying robot (6) to a preset shooting position to image the protective film being grasped.

3. The liquid crystal display screen coating equipment according to claim 2, characterized in that: It also includes a protective housing (702) fixed to the stand (701), the image acquisition unit (703) and the light source (704) are both housed in the protective housing (702), and the protective housing (702) has a light-transmitting area for the light path to pass through.

4. The liquid crystal display screen coating equipment according to claim 1, characterized in that: The flipping material handling unit (3) is located between the feeding / discharging component (2) and the film application station (4); The flipping and picking unit (3) is configured as follows: In the first direction, the workpiece is picked up from the feed / discharge assembly (2) and flipped at least once during the transfer to the film application station (4) so ​​that the workpiece is placed in the film application station (4) with the film application surface facing up. In the second direction, the film-coated workpiece is picked up from the film-coating station (4) and transferred back to the feed / discharge assembly (2).

5. The liquid crystal display screen coating equipment according to claim 4, characterized in that, The flipping and picking unit (3) includes: Support frame (301) fixed to frame (1); The lifting drive component (302) is installed on the support frame (301), and the actuating end of the lifting drive component (302) is connected to the mounting plate (303). The rotating assembly includes a rotary drive (304) fixed to the mounting plate (303), a rotating shaft (305) driven by the rotary drive (304) to rotate about a horizontal axis, and a swing arm (306) fixedly connected to the rotating shaft (305). The end of the swing arm (306) is provided with an adsorption actuator (307) for gripping the workpiece.

6. The liquid crystal display screen coating equipment according to claim 5, characterized in that, The film application station (4) includes a support platform (401) fixed to the frame (1), and the top surface of the support platform (401) is provided with an adsorption area (402) for adsorbing and fixing the workpiece. The top of the support platform (401) is constructed with a clearance space for the swing arm (306) and the adsorption actuator (307) at its end to be embedded, so that when the flipping material handling unit (3) places the workpiece at the film application station (4), the swing arm (306) and the adsorption actuator (307) can descend into the clearance space.

7. The liquid crystal display screen coating equipment according to claim 6, characterized in that, Also includes: First supplementary lighting component (403) and second supplementary lighting component (308); The first supplementary light element (403) is fixed to the support platform (401), and its light emission direction is parallel to the first side of the support platform (401); The second supplementary light element (308) is fixed to the swing arm (306), and its light emission direction is parallel to the second side of the support platform (401). The first side of the support platform (401) is perpendicular to the second side.

8. The liquid crystal display screen coating equipment according to claim 1, characterized in that: The frame (1) includes a support shell (101) with a working cavity, and a structural frame (102) fixed inside the working cavity. The feeding / discharging assembly (2), the flipping and picking unit (3), the film application station (4), the film supply assembly (5), and the second vision module (7) are all installed at the bottom of the working chamber; The film-applying robot (6) and the first vision module (8) are both mounted on the structural frame (102).

9. The liquid crystal display screen coating equipment according to claim 8, characterized in that: The film-applying robot (6) is a three-axis robot.

10. The liquid crystal display screen coating equipment according to claim 1, characterized in that: The feeding / discharging assembly (2) has a first belt (2a) and a second belt (2b) that are synchronous / asynchronous. Two sets of flipping material handling units (3), two sets of film application stations (4), two sets of film supply components (5), two sets of film application robots (6) and two sets of second vision modules (7) are symmetrically arranged on both sides of the feeding / discharging component (2). The first vision module (8) is provided with one or two sets.

Images