Liquid crystal display screen producing and processing device

Abstract

The invention is suitable for the technical field of liquid crystal display screen production equipment, and provides a liquid crystal display screen production and processing device which is characterized in that a sliding frame is slidably arranged on a rack, a first carrying plate used for carrying a substrate is detachably arranged on the sliding frame, and the sliding frame slides relative to the rack to form a conveying path; the two film covering assemblies are located on the conveying path. The plate changing assembly is arranged at the tail end of the conveying path and comprises a lifting frame and a driver, and the lifting frame is detachably provided with a second carrying plate; the lifting frame covers the second carrier plate and the first carrier plate, and the driver drives the first carrier plate and the second carrier plate to synchronously rotate and exchange positions. The substrate is driven by the sliding piece to move back and forth on the conveying path, the plate changing assembly at the tail end of the conveying path changes the plate, and then the substrate is turned over, so that the polaroids on the two plate surfaces of the substrate are attached in the back and forth process of the substrate, two independent attaching production lines are not needed, the occupied area of the equipment is small, and the manufacturing cost is low.

Description

Technical Field

[0001] This application belongs to the technical field of liquid crystal display screen production equipment, and in particular relates to a liquid crystal display screen production and processing apparatus. Background Technology

[0002] Liquid crystal displays (LCDs) use a backlight module to provide a light source and a liquid crystal panel to precisely control the light to display images. The liquid crystal panel has a layered structure, with two glass plates sandwiching liquid crystal molecules to form a substrate. Polarizing films are attached to both sides of the substrate. Therefore, in the production of LCDs, polarizing films need to be attached to both sides of the substrate.

[0003] Existing polarizer bonding equipment typically employs two bonding lines to bond polarizers to both sides of the substrate, connected by a flipping mechanism. After the first line completes the front bonding, its carrier transports the substrate to the flipping station. A robotic arm picks up the substrate and places it on a flipping plate. The flipping plate rotates, snapping the substrate into the receiving carrier of the second line, thus flipping the substrate. However, this solution requires two complete bonding lines, with robotic arms handling the material and flipping, increasing the equipment's footprint and manufacturing costs. Summary of the Invention

[0004] The purpose of this application is to provide a liquid crystal display screen manufacturing and processing apparatus, which aims to solve the problems of large footprint and high manufacturing cost of existing polarizer bonding equipment.

[0005] The embodiments of this application are implemented as follows: a liquid crystal display screen manufacturing and processing apparatus includes: A frame, on which a sliding frame is slidably disposed, and on which a first carrier plate for carrying a substrate is detachably disposed, the sliding frame sliding relative to the frame to form a conveying path; Two coating assemblies are located on the conveying path, and the two coating assemblies are used to attach polarizers to the two surfaces of the substrate respectively. A plate changing assembly is located at the end of the conveying path. The plate changing assembly includes a lifting frame and a driver. The lifting frame is lifted and lowered on the frame. The lifting frame is detachably equipped with a second carrier plate. The lifting frame covers the second carrier plate with the first carrier plate. The driver drives the first carrier plate and the second carrier plate to rotate synchronously and exchange positions, so that the first carrier plate is disconnected from the sliding frame and connected to the lifting frame, and the second carrier plate is disconnected from the lifting frame and connected to the sliding frame.

[0006] The liquid crystal display manufacturing and processing apparatus provided in this application embodiment drives the substrate to move back and forth on the conveying path through a sliding member. Two coating components are set on the conveying path, and the substrate is changed by the board changing component at the end of the conveying path. During the board changing process, the substrate is flipped. In this way, polarizers are attached to the two sides of the substrate during the back and forth movement of the substrate. There is no need for two separate bonding production lines. The equipment has a small footprint and low manufacturing cost. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of a liquid crystal display screen manufacturing and processing apparatus provided in an embodiment of this application; Figure 2 A front view of a liquid crystal display manufacturing and processing apparatus provided in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the plate-changing assembly provided in the embodiments of this application; Figure 4 This is a schematic diagram of the structure of the sliding frame and the first carrier plate provided in the embodiments of this application; Figure 5 This is a schematic diagram of the structure of the cutter assembly provided in the embodiments of this application; Figure 6 This is a schematic diagram of the structure of the negative pressure suction plate provided in the embodiments of this application; Figure 7 for Figure 2 A magnified view of a section at point A in the middle; Figure 8 for Figure 7 A magnified view of a section at point B in the middle; Figure 9 This is a schematic diagram of the deformation of the arc-shaped plate provided in an embodiment of this application.

[0008] In the picture: 100. Frame; 110. Sliding frame; 111. First limiting groove; 120. Screw; 200. Coating assembly; 210. Polarizing film unwinding drum; 220. Release film take-up drum; 230. Guide roller; 240. Separating plate; 30. Substrate; 400. Plate changing assembly; 410. Lifting frame; 420. Drive gear; 430. First drive motor; 440. Second limiting groove; 450. Magnetic suction element; 510. First carrier plate; 520. Second carrier plate; 501. First connecting part; 502. Second connecting part; 503. Limiting pin; 504. Half gear; 600. Pressing roller; 700. Cutting blade assembly; 710. Blade body; 720. Second drive motor; 730. Crank; 800. Negative pressure suction plate; 810. Arc plate; 811. Limiting part; 812. Rotating rod. Detailed Implementation

[0009] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0010] The specific implementation of this application will be described in detail below with reference to specific embodiments.

[0011] like Figure 1 The diagram shown is a structural schematic of a liquid crystal display screen manufacturing and processing apparatus provided in an embodiment of this application, including: a frame 100, two film coating components 200, and a plate changing component 400.

[0012] like Figure 1 As shown, a sliding frame 110 is slidably mounted on the frame 100. A first carrier plate 510 for supporting the substrate 30 is detachably mounted on the sliding frame 110. The sliding frame 110 slides relative to the frame 100 to form a transport path. In this embodiment, the sliding frame 110 drives the first carrier plate 510 and the substrate 30 to slide back and forth in a straight line on the frame 100 to form a straight segment of the transport path. In some embodiments, the first carrier plate 510 is provided with a mounting cavity for accommodating the substrate 30. The depth of the mounting cavity is less than the thickness of the substrate 30, allowing the substrate 30 to protrude from the upper surface of the first carrier plate 510.

[0013] like Figure 1 and Figure 2 As shown, two coating assemblies 200 are located on the transport path, and the two coating assemblies 200 are used to attach polarizers to the two surfaces of the substrate 30, respectively. Specifically, refer to... Figure 2 As shown, the two coating assemblies 200 are symmetrically arranged. When the sliding frame 110 is conveying the substrate from right to left in the forward direction, the coating assembly 200 on the right side attaches a polarizer to one surface of the substrate 30. When the sliding frame 110 returns from left to right, the coating assembly 200 on the left side attaches a polarizer to the other surface of the substrate 30.

[0014] like Figure 1 and Figure 2 As shown, the plate changing assembly 400 is located at the end of the conveying path, as... Figure 3 As shown, the plate-changing assembly 400 includes a lifting frame 410 and a driver. The lifting frame 410 is movably mounted on the frame 100, and a second carrier plate 520 is detachably mounted on the lifting frame 410. In this embodiment, the structure of the second carrier plate 520 is the same as that of the first carrier plate 510.

[0015] The lifting frame 410 covers the second carrier plate 520 with the first carrier plate 510. The driver drives the first carrier plate 510 and the second carrier plate 520 to rotate synchronously and exchange positions, so that the first carrier plate 510 is disconnected from the sliding frame 110 and connected to the lifting frame 410, and the second carrier plate 520 is disconnected from the lifting frame 410 and connected to the sliding frame 110.

[0016] In this embodiment, the substrate 30 is placed on the first carrier plate 510 at the front end of the transport path. The sliding frame 110 moves the substrate 30, which passes through two coating assemblies 200, one of which attaches a polarizing film to one surface of the substrate 30. When the sliding frame 110 moves to the end of the transport path, the lifting frame 410 descends to align and cover the second carrier plate 520 with the first carrier plate 510. The driver drives the first carrier plate 510 and the second carrier plate 520 to rotate synchronously by 180° to interchange positions, causing the first carrier plate 510 to disengage from the sliding frame 110 and connect to the lifting frame 410, and causing the second carrier plate 520 to disengage from the lifting frame 410 and connect to the sliding frame 110. The substrate 30 is then flipped 180° between the first carrier plate 510 and the second carrier plate 520 and falls onto the second carrier plate 520. Subsequently, the lifting frame 410 lifts the first carrier plate 510, and the sliding frame 110 moves the second carrier plate 520 and the substrate 30 back. During the return process, another coating assembly 200 attaches a polarizer to another surface of the substrate 30. When returning to the front end of the transport path, the substrate 30 with the polarizer attached can be removed and replaced with a new substrate 30.

[0017] In this embodiment, by setting a plate changing assembly 400 at the end of the conveying path, the substrate 30 can complete the double-sided attachment of the polarizer during the round trip, eliminating the need to set up two complete attachment production lines, thus reducing the footprint and manufacturing cost of the polarizer attachment equipment.

[0018] like Figure 3 and Figure 4 As shown in some embodiments of this application, the first carrier plate 510 and the second carrier plate 520 are respectively provided with a first connecting portion 501 and a second connecting portion 502 at both ends. The sliding frame 110 is provided with a first limiting groove 111 that cooperates with the first connecting portion 501, and the lifting frame 410 is provided with a second limiting groove 440 that cooperates with the second connecting portion 502. The driver drives the first carrier plate 510 and the second carrier plate 520 to rotate, so that the first connecting portion 501 engages with the first limiting groove 111 and the second connecting portion 502 separates from the second limiting groove 440, or so that the first connecting portion 501 separates from the first limiting groove 111 and the second connecting portion 502 engages with the second limiting groove 440.

[0019] In this embodiment, semi-circular shafts are coaxially arranged at the center of both sides of the first carrier plate 510 and the second carrier plate 520, forming a complete rotating shaft when the first carrier plate 510 and the second carrier plate 520 are closed. A first connecting portion 501 and a second connecting portion 502 are respectively provided at the ends of the two semi-circular shafts, and the first connecting portion 501 and the second connecting portion 502 have a semi-circular annular cross-section. Figure 3 and 4 As shown, both the first limiting groove 111 and the second limiting groove 440 are semi-circular annular grooves. By rotating the first carrier plate 510 and the second carrier plate 520, the plate changing between the lifting frame 410 and the sliding frame 110 can be realized, and the substrate 30 can be flipped. Compared with the traditional solution of transporting and flipping between two carriers using a robot and a flipping plate, the plate changing assembly 400 provided in this embodiment has a simple structure and can return the substrate 30 along the original path without the need for a second conveyor line.

[0020] like Figure 3 As shown and Figure 4 As shown, in some embodiments of this application, the driver includes a first drive motor 430 mounted on a lifting frame 410. The output shaft of the first drive motor 430 is fixedly provided with a drive gear 420. A half gear 504 is fixedly provided on the rotating shafts of the first carrier plate 510 and the second carrier plate 520 respectively. The two carrier plates are closed to make the two half gears 504 combine to form a driven gear that meshes with the drive gear 420.

[0021] In this embodiment, the first drive motor 430 drives the drive gear 420 to rotate. The drive gear 420 meshes with the driven gear, thereby driving the first carrier plate 510 and the second carrier plate 520 to rotate. Moreover, when the drive gear 420 is stationary, it can mesh with the half gear 504 on the second carrier plate 520 to limit the rotation of the second carrier plate 520 and make it stable on the lifting frame 410.

[0022] In some embodiments of this application, such as Figure 7 As shown, the coating assembly 200 includes a polarizer unwinding spool 210, a release film winding spool 220, a separation plate 240, and multiple guide rollers 230. The polarizer unwinding spool 210 is used to unwind the polarizer, the release film winding spool 220 is used to wind the release film, the separation plate 240 is used to separate the polarizer from its release film, and the multiple guide rollers 230 are used to guide the transmission path of the polarizer and the release film. The polarizer is unwound from the polarizer unwinding spool 210, guided by the multiple guide rollers 230 through the separation plate 240, and after separation, the polarizer is attached to the substrate 30. The release film is then guided by the guide rollers 230 to the release film winding spool 220 for winding.

[0023] In this embodiment, a release film is provided on the adhesive surface of the polarizer to prevent contamination. The release film and the polarizer are in a strip structure and are wound in the polarizer unwinding spool 210. Figure 8 As shown, at the edge of the separation plate 240, the polarizer continues to extend forward, while the release film wraps around to the lower surface of the separation plate 240 and is guided to the release film winding drum 220, thus achieving the separation of the polarizer and the release film.

[0024] In some embodiments of this application, such as Figure 5 and Figure 8 As shown, a cutter assembly 700 is provided at the front end of the separation plate 240. The cutter assembly 700 includes a second drive motor 720 and a cutter body 710. The cutter body 710 is connected to the frame 100 through two cranks 730. The cutter body 710, the frame 100 and the two cranks 730 form a parallelogram mechanism. The second drive motor 720 is connected to one of the cranks 730 to drive it to rotate.

[0025] In this embodiment, the blade 710 performs a circumferential translational motion to facilitate the cutting of the polarizer. Specifically, after the polarizer separates from the release film, a backing plate cannot be placed below it, and the blade 710 moves directly downwards. The polarizer is not subjected to force and cannot be cut effectively. However, the blade 710 of this application has a lateral cutting action while moving downwards, which can effectively cut the polarizer.

[0026] In some embodiments of this application, such as Figure 6 and Figure 8 The blade 710 is further provided with a negative pressure suction plate 800 on the side away from the separation plate 240. The negative pressure suction plate 800 is used to adsorb the polarizer. In this embodiment, the negative pressure suction plate 800 adsorbs the upper surface of the polarizer, and together with the separation plate 240, fixes both ends of the polarizer, making it easy for the blade 710 to cut the polarizer in the middle, thus effectively cutting the polarizer.

[0027] In some embodiments of this application, such as Figure 6 and Figure 9 As shown, the negative pressure suction plate 800 is also connected to an arc-shaped plate 810 suitable for elastic deformation. The first end of the arc-shaped plate 810 is fixed to the negative pressure suction plate 800, and the second end is bent downward and extended with a limiting part 811 at the end. The limiting part 811 is used to abut against the end of the polarizer. The second end of the arc-shaped plate 810 is also fixedly connected to a rotating rod 812 extending along its length direction. The rotating rod 812 is used to drive the second end of the arc-shaped plate 810 to rotate so that the arc-shaped plate 810 deforms.

[0028] In this embodiment, the polarizer extends from the separation plate 240 and advances along the arc-shaped plate 810, abutting against the limiting portion 811 of the arc-shaped plate 810 and conforming to the arc-shaped plate 810. For example... Figure 8 As shown, the sliding frame 110 moves the base plate 30 to the limiting part 811 that abuts against the arc-shaped plate 810. The rotating rod 812 rotates, and the arc-shaped plate 810 deforms, as shown. Figure 9 As shown by the dashed line, the end of the polarizer can be attached to the end of the substrate 30. This facilitates the positioning of the end of the polarizer and the end of the substrate 30.

[0029] In conventional polarizer application equipment, a roller is typically positioned at the front end of the separator plate 240. As the separator plate 240 and the roller descend simultaneously, the roller presses the end of the polarizer onto the end of the substrate 30. However, this conventional polarizer application equipment typically uses pre-cut polarizers, eliminating the need for a cutter assembly between the roller and the separator plate 240. The roller can be positioned close to the edge of the separator plate 240, and the polarizer only needs to extend a small distance beyond the edge of the separator plate to reach the area under the roller.

[0030] This application uses an uncut strip polarizer, requiring a cutter assembly 700 at the front end of the separation plate 240 to cut the polarizer. If a conventional roller structure is used, the polarizer needs to extend beyond the cutter assembly 700 by a considerable distance. The extended portion of the polarizer has low rigidity and is easily affected by environmental factors, causing deformation and drift, resulting in poor alignment accuracy between the polarizer and the substrate 30. This application uses an arc-shaped plate 810 to limit and fix the end of the polarizer. The end of the polarizer advances along the arc-shaped plate 810 and abuts against the limiting part 811. The polarizer is driven by the arc-shaped plate 810 to form an arc shape and conform to the arc-shaped plate, giving the extended portion of the polarizer better rigidity, preventing drift, and reducing interference from external factors, thus improving the alignment accuracy between the ends of the polarizer and the substrate 30.

[0031] In some embodiments, such as Figure 1 As shown, the rotating rod 812 is driven by a motor. When the substrate 30 returns, the motor drives the rotating rod 812, and the arc-shaped plate 810 returns to its shape.

[0032] In some embodiments of this application, such as Figure 1 and Figure 7 As shown, the polarizer attachment equipment also includes a pressing roller 600, which is used to press the polarizer and the substrate 30 together. In this embodiment, the pressing roller 600 can make the polarizer and the substrate 30 fit tightly together.

[0033] In some embodiments of this application, such as Figure 4 and Figure 5As shown, the sliding frame 110 is provided with a limiting hole, and the first carrier plate 510 and the second carrier plate 520 are each movably provided with a limiting pin 503. The limiting pin 503 extends into the limiting hole to restrict the relative rotation between the first carrier plate 510 or the second carrier plate 520 and the sliding frame 110. The lifting frame 410 is provided with a magnetic attractor 450, which is used to attract the limiting pin 503 to disengage it from the limiting hole. In this embodiment, the cooperation of the limiting pin 503 and the limiting hole can restrict the rotation between the first carrier plate 510 or the second carrier plate 520 and the sliding frame 110, making the first carrier plate 510 and the second carrier plate 520 stable. Specifically, in some embodiments, the limiting pin 503 can be made of a material that is easily attracted by magnets, such as iron or a magnet.

[0034] In some embodiments of this application, a screw 120 is rotatably mounted on the frame 100, and a nut that cooperates with the screw 120 is fixedly mounted on the sliding frame 110. When the screw 120 rotates, it drives the sliding frame 110 to slide through the nut. In this embodiment, the screw 120 is driven to rotate by a motor, thereby driving the sliding frame 110 to move.

[0035] The above embodiments of this application provide a liquid crystal display manufacturing and processing apparatus. A sliding member drives a substrate 30 to reciprocate along a transport path. Two coating assemblies 200 are arranged along the transport path. At the end of the transport path, a plate-changing assembly 400 changes the substrate 30, thereby flipping the substrate 30. This allows polarizers to be attached to both surfaces of the substrate 30 during its reciprocating motion, eliminating the need for two separate attachment lines. The apparatus has a small footprint and low manufacturing cost. Furthermore, the curved plate 810 facilitates end positioning of the polarizer and the substrate 30.

[0036] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A liquid crystal display screen manufacturing and processing apparatus, characterized in that, include: A frame, on which a sliding frame is slidably disposed, and on which a first carrier plate for carrying a substrate is detachably disposed, the sliding frame sliding relative to the frame to form a conveying path; Two coating assemblies are located on the conveying path, and the two coating assemblies are used to attach polarizers to the two surfaces of the substrate respectively. A plate changing assembly is located at the end of the conveying path. The plate changing assembly includes a lifting frame and a driver. The lifting frame is lifted and lowered on the frame. The lifting frame is detachably equipped with a second carrier plate. The lifting frame covers the second carrier plate with the first carrier plate. The driver drives the first carrier plate and the second carrier plate to rotate synchronously and exchange positions, so that the first carrier plate is disconnected from the sliding frame and connected to the lifting frame, and the second carrier plate is disconnected from the lifting frame and connected to the sliding frame.

2. The liquid crystal display screen manufacturing and processing apparatus according to claim 1, characterized in that, Both ends of the first carrier plate and the second carrier plate are respectively provided with a first connecting part and a second connecting part. The sliding frame is provided with a first limiting groove that cooperates with the first connecting part, and the lifting frame is provided with a second limiting groove that cooperates with the second connecting part. The driver drives the first carrier plate and the second carrier plate to rotate, so that the first connecting part engages with the first limiting groove and the second connecting part separates from the second limiting groove, or so that the first connecting part separates from the first limiting groove and the second connecting part engages with the second limiting groove.

3. The liquid crystal display screen manufacturing and processing apparatus according to claim 1, characterized in that, The driver includes a first drive motor mounted on a lifting frame. The output shaft of the first drive motor is fixedly equipped with a drive gear. A half gear is fixedly mounted on the rotating shaft of the first carrier plate and the second carrier plate respectively. The two carrier plates are closed to make the two half gears combine to form a driven gear that meshes with the drive gear.

4. The liquid crystal display screen manufacturing and processing apparatus according to claim 1, characterized in that, The coating assembly includes a polarizer unwinding drum, a release film winding drum, a separation plate, and multiple guide rollers. The polarizer unwinding drum is used to unwind the polarizer, the release film winding drum is used to wind the release film, the separation plate is used to separate the polarizer from its release film, and the multiple guide rollers are used to guide the transmission path of the polarizer and the release film. The polarizer is unwound from the polarizer unwinding drum, guided by the multiple guide rollers through the separation plate, and after separation, the polarizer is attached to the substrate. The release film is then guided by the guide rollers to the release film winding drum for winding.

5. The liquid crystal display screen manufacturing and processing apparatus according to claim 4, characterized in that, The front end of the separation plate is provided with a cutting assembly, which includes a second drive motor and a blade body. The blade body is connected to the frame through two cranks. The blade body, the frame, and the two cranks form a parallelogram mechanism. The second drive motor is driven by one of the cranks to rotate it.

6. The liquid crystal display screen manufacturing and processing apparatus according to claim 5, characterized in that, The blade body is also provided with a negative pressure suction plate on the side away from the separation plate, and the negative pressure suction plate is used to adsorb the polarizer.

7. A liquid crystal display screen manufacturing and processing apparatus according to claim 6, characterized in that, The negative pressure suction plate is also connected to an arc-shaped plate suitable for elastic deformation. The first end of the arc-shaped plate is fixed to the negative pressure suction plate, and the second end is bent downward and extended with a limiting part at the end. The limiting part is used to abut against the end of the polarizer. The second end of the arc-shaped plate is also fixedly connected to a rotating rod extending along its length direction. The rotating rod is used to drive the second end of the arc-shaped plate to rotate so that the arc-shaped plate deforms.

8. The liquid crystal display screen manufacturing and processing apparatus according to claim 1, characterized in that, It also includes a pressing roller for pressing the polarizer and the substrate.

9. A liquid crystal display screen manufacturing and processing apparatus according to claim 1, characterized in that, The sliding frame is provided with a limiting hole, and the first and second carrier plates are each provided with a limiting pin. The limiting pin extends into the limiting hole to restrict the relative rotation between the first or second carrier plate and the sliding frame. The lifting frame is provided with a magnetic attractor, which is used to attract the limiting pin so that it is disengaged from the limiting hole.

10. A liquid crystal display screen manufacturing and processing apparatus according to claim 1, characterized in that, A screw is rotatably mounted on the frame, and a nut that cooperates with the screw is fixedly mounted on the sliding frame. When the screw rotates, it drives the sliding frame to slide through the nut.

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