A CCD screen mounting machine for a curved LCD screen

Abstract

The present invention discloses a CCD screen pasting machine for a foldable liquid crystal screen, which has a machine base and a vertical support plate fixed thereon, and the machine base is also provided with an XYR high-precision alignment platform, and an alignment and pasting fixture is arranged on the XYR high-precision alignment platform, and the alignment and pasting fixture comprises a support base, and the support base has a horizontal support part, and the top supports the horizontal support plate to support the liquid crystal curved screen, and also has an adjustment support part, and an upwardly inclined height adjustment pad is provided to support the inclined support support plate; a line scanning light source is also provided on the side of the horizontal support part, and a lifting nozzle assembly is provided on the vertical support plate directly above the alignment and pasting fixture, and a lifting visual assembly is supported on the upper part of the vertical support plate near the adjustment support part. The CCD screen pasting machine for a foldable liquid crystal screen of the present invention automatically pasted the liquid crystal screen that is foldable or has a foldable screen, thereby improving the pasting efficiency and automation of the foldable or foldable mobile phone.

Description

Technical Field

[0001] The present invention relates to the technical field of CCD screen pasting machines, and in particular to a CCD screen pasting machine for a curved liquid crystal screen. Background Art

[0002] When attaching screens to electronic products, such as mobile phones, the electronic products (mobile phones) and the screens are separated by cardboard in the initial state. The existing technology generally attaches screens manually, and the screen attaching position is inaccurate, which increases the labor intensity of manual screen attaching and also increases the production cost. Therefore, it is necessary to provide an automatic screen attaching machine. First, the electronic product (mobile phone) is placed in a carrier, and the carrier clamps the cylinder to clamp and position it. The suction cup on the carrier absorbs the electronic product; at the same time, a light source is provided for the camera to position the camera for taking pictures; then the Z-axis module moves down to contact the screen to absorb the screen, separate the screen from the cardboard, and manually remove the cardboard. The camera automatically adjusts its position to ensure that the focal length is aligned with the position of the screen to be attached to the electronic product; then the camera takes pictures to position it, and the carrier adjusts the X, Y, and angle positions for alignment, and then the screen is attached.

[0003] Existing CCD screen laminating machines can only meet the needs of automatic alignment and lamination of straight-screen mobile phones or straight-screen LCD displays. For foldable or curved-screen mobile phones or LCD displays, multiple alignment and lamination are required, which is inefficient. In addition, multiple laminations may also lead to the risk of screen scratches. Summary of the invention

[0004] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a positioning and laminating jig capable of supporting and positioning a foldable LCD screen or a LCD screen with a bendable screen, thereby facilitating the laminating of a film on the surface of the foldable LCD screen or the LCD screen with a bendable screen. The positioning and laminating jig can be directly installed on a CCD screen laminating machine for use, and cooperates to complete the automatic laminating process, thereby reducing the positioning time of the foldable LCD screen or the LCD screen with a bendable screen, and improving the laminating efficiency of the foldable LCD screen or the LCD screen with a bendable screen. A CCD screen laminating machine for a foldable LCD screen.

[0005] The technical solution adopted by the present invention is: a CCD screen bonding machine for a curved liquid crystal screen, comprising a machine base and a vertical support plate fixed thereon, the machine base is also provided with an XYR high-precision alignment platform, an alignment bonding jig is arranged on the XYR high-precision alignment platform, the alignment bonding jig is used for bonding a liquid crystal curved screen with a bending portion, and the alignment bonding jig comprises a supporting base, wherein:

[0006] Support base,

[0007] -Integrally connected to the top of the XYR high-precision alignment platform;

[0008] -It has a horizontal support part, the bottom is fixedly connected to the XYR high-precision alignment platform through a plug-in connector, and the top supports the horizontal support plate to support the LCD curved screen;

[0009] - It also has an adjustable support portion, which is provided with an upwardly inclined height-adjusting pad to support the inclined support plate;

[0010] A plurality of suction nozzle assemblies are provided on the top of the horizontal support plate;

[0011] The inclined support plate also has a plurality of nozzle assemblies on the top and is rotatably and adjustably connected between the horizontal support portion and the adjustment support portion;

[0012] A line scanning light source is also provided on the side of the horizontal support part, and the line scanning light source is connected to the control device of the CCD screen pasting machine to assist the bending liquid crystal alignment film pasting and the mobile phone case pasting, thereby improving the processing efficiency of the foldable mobile phone;

[0013] The vertical support plate is located directly above the alignment and fitting fixture and is provided with a lifting nozzle assembly. The lifting nozzle assembly is driven to rise and fall by the KK module and the lifting servo motor, thereby driving the mobile phone case adsorbed on the lifting nozzle assembly to rise and fall;

[0014] A lifting vision component is supported above the vertical support plate near the adjustment support part. Two industrial cameras are provided at the bottom of the lifting vision component. Each industrial camera obtains the image of the product supported on the alignment and bonding fixture through a telecentric lens. The product here is a bent LCD screen or a mobile phone case.

[0015] Furthermore, the lifting vision component is also connected to the vision component servo motor through the KK module, and the lifting servo motor and the vision component servo motor are both connected to the control device to achieve automatic drive.

[0016] Furthermore, a machine cover is provided above the machine base, and an observation window is provided on the machine cover at a height range facing the XYR high-precision alignment platform and the alignment and bonding fixture for observing the screen bonding process. The observation window can also be equipped with glass and designed into an openable door or sliding door structure for easy operation. A display screen and an emergency three-color light are also provided on the machine cover.

[0017] Further, the height-adjusting pad block has its bottom fixed on the adjustment support portion, and its top located on both sides of the inclined support bracket is fixedly connected to both sides of the inclined support bracket through an adjustment ear piece respectively;

[0018] Each adjusting ear piece has an arc-shaped adjusting slot at its center for adjusting the angle of the inclined supporting plate relative to the adjusting supporting portion.

[0019] Furthermore, the arc-shaped adjustment slot of each adjustment ear piece is respectively fixed to the tilt support plate and the height adjustment pad by a screw assembly.

[0020] Furthermore, the top of the height adjustment pad extends close to the bottom of the inclined support plate, and the height adjustment pad is provided with an adaptive fitting slope that fits or approximately fits the bottom surface of the inclined support plate, and the adaptive fitting slope is located between the two side surfaces of the height adjustment pad close to the bottom of the inclined support plate.

[0021] Furthermore, the outer edges of the horizontal support plate and the inclined support plate are respectively provided with a horizontal limiting structure and an inclined edge limiting structure protruding from the top surface thereof.

[0022] Furthermore, a protruding rotating support block is provided between the horizontal supporting portion of the supporting base and the top of the adjusting supporting portion, and the inclined supporting support plate is connected to rotate on the rotating support block via a rotating shaft.

[0023] Furthermore, the XYR high-precision alignment platform is also provided with an automatic horizontal loading component on one side of the horizontal support portion of the support base.

[0024] The automatic horizontal loading assembly drives the loading pallet to reciprocate through the servo cylinder;

[0025] The servo cylinder is fixed to the side of the XYR high-precision alignment platform through the cylinder support, thereby ensuring that the loading pallet and the horizontal pallet of the support base are in corresponding positions.

[0026] Furthermore, a positioning protrusion structure is also provided on the loading support plate.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: the CCD screen laminating machine for a foldable LCD screen of the present invention uses an alignment and laminating jig fixed on an XYR high-precision alignment platform, a line scanning light source, a lifting nozzle assembly, and a lifting vision assembly to automatically complete the laminating action of a foldable LCD screen or a foldable LCD screen under the coordination of a control device. There is no need for manual operation, and there is no need for multiple alignment and laminating of foldable or foldable mobile phones, thereby improving the screen laminating efficiency and automation level of foldable or foldable mobile phones.

[0028] The alignment and laminating jig of the present invention is provided with a support base having a horizontal support portion and an adjustable support portion on an XYR high-precision alignment platform, so that a foldable LCD screen or a LCD screen with a foldable screen can be directly installed on a CCD screen laminating machine for use, and cooperates to complete an automatic film laminating process, thereby reducing the alignment time of the foldable LCD screen or a LCD screen with a foldable screen and improving the screen laminating efficiency of the foldable LCD screen or a LCD screen with a foldable screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The present invention is a structural diagram of an embodiment of a CCD screen mounting machine for a curved liquid crystal screen;

[0030] Figure 2It is a structural diagram of the lifting nozzle assembly and the lifting vision assembly on the vertical support plate;

[0031] Figure 3 This is a structural diagram of the alignment fixture fixed on the XYR high-precision alignment platform;

[0032] Figure 4 It is the three-dimensional structure diagram of the alignment and bonding fixture;

[0033] Figure 5 This is the connection structure diagram of the height-adjusting pad;

[0034] Figure 6 It is a structural diagram of another embodiment of a CCD screen mounting machine for a curved liquid crystal screen;

[0035] Among them: 1-support base, 101-horizontal support part, 102-adjustable support part, 103-rotating support block; 2-XYR high-precision alignment platform, 3-horizontal support plate, 31-horizontal limit structure; 4-inclined support support plate, 41-inclined edge limit structure; 5-plug connector, 6-LCD curved screen, 61-bending part; 7-nozzle assembly, 8-height adjustment pad, 81-adaptive fitting inclined surface; 9-adjustment ear piece, 91-arc adjustment slot; 10-rotating shaft , 11-automatic horizontal feeding assembly, 111-servo cylinder, 112-feeding tray, 113 positioning protrusion structure, 12-line scanning light source, 13-machine base, 14-lifting nozzle assembly, 15-KK module, 16-lifting vision assembly, 17-industrial camera, 18-telecentric lens, 19-vertical support plate, 20-lifting servo motor, 21-vision assembly servo motor, 22-machine cover, 23-display screen, 24-emergency tricolor light, 25-observation window. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the combination or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, in the description of the embodiments of the present invention, the device positional relationships such as "up", "down", "front", "back", "left", "right" and the like in all the drawings are based on the positions or positional relationships shown in the accompanying drawings. Figure 1 As standard.

[0038] like Figure 1 As shown, a CCD screen bonding machine for a curved liquid crystal screen has a machine base 13 and a vertical support plate 19 fixed thereon. The machine base 13 is also provided with an XYR high-precision alignment platform 2. The XYR high-precision alignment platform 2 is mainly composed of a linear motor and a DD motor. The theoretical repeatability can reach 0.002mm. Fine adjustments are made according to product photography and final high-precision compensation. The linear motor is composed of a mover and a stator through a combination of designed and processed components. An alignment bonding fixture is provided on the XYR high-precision alignment platform 2. The alignment bonding fixture is used for bonding a liquid crystal curved screen 6 having a bending portion 61. The alignment bonding fixture includes a support base 1. The structure of the liquid crystal curved screen 6 is referenced Figure 4 and Figure 5 As shown, where:

[0039] Support base 1,

[0040] -Integrally connected to the top of the XYR high-precision alignment platform 2;

[0041] - It has a horizontal support part 101, the bottom of which is fixedly connected to the XYR high-precision alignment platform 2 through a plug-in connector 5, and the top supports a horizontal support plate 3 to support the liquid crystal curved screen 6;

[0042] - It also has an adjustable support portion 102, which is provided with an upwardly inclined height-adjusting pad 8 to support the inclined support support plate 4;

[0043] A plurality of suction nozzle assemblies 7 are provided on the top of the horizontal support plate 3;

[0044] The tilt support plate 4 also has a plurality of nozzle assemblies 7 on the top, and is rotatably and adjustably connected between the horizontal support portion 101 and the adjustable support portion 102;

[0045] A line scanning light source 12 is also provided on the side of the horizontal support part 101. The line scanning light source 12 is connected to the control device of the CCD screen pasting machine to assist the bending liquid crystal alignment film pasting and the mobile phone case pasting, thereby improving the processing efficiency of the foldable mobile phone; the control device includes at least a servo motion control module, which is mainly composed of 2 high-precision servo modules with a theoretical repeatability of 0.003-0.005mm. The camera and the suction cup are driven to move in the Z direction respectively, and the precise movement of the module is controlled by the controller, thereby ensuring the accuracy of the module movement and making the automatic operation more stable;

[0046] A vertical support plate 19 is provided with a lifting nozzle assembly 14 directly above the alignment and laminating fixture. The lifting nozzle assembly 14 is driven to rise and fall by a KK module 15 and a lifting servo motor 20, thereby driving the foldable LCD screen or mobile phone case adsorbed on the lifting nozzle assembly 14 to rise and fall;

[0047] Combination Figure 1 and Figure 2 As shown, the vertical support plate 19 supports a lifting vision component 16 near the upper side of the adjustment support portion 102. Two industrial cameras 17 are arranged at the bottom of the lifting vision component 16. Each industrial camera 17 obtains the image of the product supported on the alignment and bonding fixture through a telecentric lens 18. The product mentioned here is a curved LCD screen or a mobile phone case. The lifting vision component 16 is used to move the telecentric lenses 18 of the two industrial cameras 17 close to or away from the curved LCD screen or mobile phone case on the alignment and bonding fixture. The industrial camera 17 is a CCD camera. The CCD camera is a 10 million high-resolution camera with a single pixel size of 1.67 µm x 1.67 µm, which fully meets the visual accuracy requirements. Real-time alignment is performed by taking pictures and image processing and calculation. The coaxial light source illuminates the shooting area, making it easier for the camera to take images that are easy to process. (The brightness can be adjusted by the light source controller, which is located in the electrical control cabinet). The camera part needs to be calibrated. The movement axis moves 1mm corresponding to the corresponding pixel change. Perform nine movements and take pictures, and input them into the calibration tool. The software automatically converts pixels and coordinates so that the final output result becomes the coordinates of the actual movement.

[0048] The lifting visual component 16 of the CCD screen mounting machine of the present invention is also connected to the visual component servo motor 21 through the KK module, and the lifting servo motor 20 and the visual component servo motor 21 are both connected to the control device to achieve automatic drive.

[0049] from Figure 6 It can also be seen that a hood 22 is provided above the base 13 of the CCD screen pasting machine of the present invention. An observation window 25 is provided on the hood 22 at a height range facing the XYR high-precision alignment platform 2 and the alignment and pasting fixture for observing the screen pasting process. The observation window can also be provided with glass and designed as an openable door or sliding door structure for easy operation. A display screen 23 and an emergency three-color light 24 are also provided on the hood 22. The display screen is used to display the image processing results after the device takes pictures, as well as the output and equipment status information, so as to monitor the equipment status in a timely and effective manner. The emergency three-color light is used to alarm in an emergency, which helps to better observe the screen pasting situation and facilitate timely emergency treatment measures.

[0050] The height adjustment pad 8 of the CCD screen mounting machine of the present invention has its bottom fixed on the adjustment support part 102, and its top is located on both sides of the inclined support plate 4 and is fixedly connected to the two sides of the inclined support plate 4 through an adjustment ear piece 9 respectively; each adjustment ear piece 9 has an arc-shaped adjustment groove 91 at the center thereof, which is used to adjust the angle of the inclined support plate 4 relative to the adjustment support part 102.

[0051] The arc-shaped adjustment groove 91 of each adjustment ear piece 9 of the CCD screen mounting machine of the present invention fixes the tilt support plate 4 and the height adjustment pad 8 through a screw assembly 10 respectively. When adjustment is needed, the tilt angle of the tilt support plate 4 is positioned by rotating the adjustment ear piece 9 and the position of the rotating arc-shaped adjustment groove 91, and then the screw assembly is tightened to secure it.

[0052] The top of the height-adjusting pad 8 of the CCD screen-mounting machine of the present invention extends close to the bottom of the inclined support plate 4, and the height-adjusting pad 8 is provided with an adaptive fitting inclined surface 81 which fits or approximately fits the bottom surface of the inclined support plate 4, and the adaptive fitting inclined surface 81 is located between the two side surfaces of the height-adjusting pad 8 close to the bottom of the inclined support plate 4, so that the height-adjusting pad 8 can be suitable for supporting LCD curved screens with different curvatures or different lengths, and can also be used to reduce the overall weight of the height-adjusting pad, so that the height-adjusting pad as a whole.

[0053] The outer edges of the horizontal support plate 3 and the inclined support plate 4 of the CCD screen laminating machine of the present invention are also respectively provided with a horizontal limiting structure 31 and an inclined edge limiting structure 41 protruding from the top surface thereof, which are used to clamp the liquid crystal curved screen placed on the horizontal support plate and the inclined support plate, thereby ensuring that the liquid crystal curved screen has more precise positioning when laminating the film.

[0054] A protruding rotating support block 103 is provided between the horizontal supporting part 101 and the top of the adjusting supporting part 102 of the supporting base 1 of the CCD screen mounting machine of the present invention, and the inclined supporting plate 4 is connected to the rotating support block 103 through the rotating shaft 10 for rotation, thereby achieving the purpose of rotation adjustment.

[0055] The XYR high-precision alignment platform 2 of the CCD screen mounting machine of the present invention is located on one side of the horizontal support portion 101 of the support base 1 and is also provided with an automatic horizontal loading component 11.

[0056] like Figure 1 and Figure 3 As shown, the automatic horizontal loading assembly 11 drives the loading pallet 112 to reciprocate through the servo cylinder 111, and then transports the curved LCD screen that needs to be laminated to the horizontal pallet 3 and the inclined support pallet 4;

[0057] The servo cylinder 111 is fixed to the side of the XYR high-precision alignment platform 2 through the cylinder support, so as to ensure that the loading pallet 112 and the horizontal pallet 3 of the support base 1 are in corresponding positions, and finally ensure that the LCD curved screen or the mobile phone with the LCD curved screen transported from the loading pallet 112 is transported to the corresponding position of the horizontal pallet 3 and fixed to achieve screen bonding. The loading pallet 112 is also provided with a positioning protrusion structure 113, which is used to realize the positioning of the LCD curved screen or the mobile phone with the LCD curved screen to prevent it from shifting or falling during transportation.

[0058] The working process of the CCD screen pasting machine for the curved liquid crystal screen of the present invention is as follows:

[0059] Double-click the control program icon on the display to open the motion program and visual processing program. Perform the return to origin operation and wait for the return to origin signal. Click the automatic button with the mouse to enter the automatic mode. Each axis reaches the working position. The employee removes the adhesive release film from the pre-assembled product and puts it into the carrier. Press the start button and the gripper extends to hold the screen.

[0060] Ensure that the person's hands are outside the equipment, and press the two-hand start button with both hands at the same time. The lifting nozzle assembly moves downward to suck the LCD curved screen, and the industrial camera moves downward to the photo-taking position to capture the image of the screen. After processing, the result is fed back to the motion axis, and the lifting nozzle assembly retracts and moves to the left and right photo-taking positions of the mobile phone frame. After the mobile phone frame completes taking the photo, the final fine-tuning result is sent to the lifting nozzle assembly motion program. The XYR high-precision alignment platform makes corresponding adjustments, reaches the adjusted fitting position, fits downward and holds pressure for two seconds, then lifts up to complete the alignment and fitting of the entire curved LCD screen.

[0061] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A CCD screen bonding machine for a curved liquid crystal screen, comprising a machine base (13) and a vertical support plate (19) fixed thereon, the machine base (13) further being provided with an XYR high-precision alignment platform (2), an alignment bonding jig being provided on the XYR high-precision alignment platform (2), the alignment bonding jig being used for bonding a liquid crystal curved screen (6) having a bending portion (61), characterized in that: The alignment and lamination fixture comprises a support base (1), wherein: Support base (1), -Integrally connected to the top of the XYR high-precision alignment platform (2); - having a horizontal support portion (101), the bottom of which is fixedly connected to the XYR high-precision alignment platform (2) via a plug-in connector (5), and the top of which supports a horizontal support plate (3) to support the liquid crystal curved screen (6); - also having an adjustable support portion (102) provided with an upwardly inclined height-adjusting pad (8) for supporting the inclined support support plate (4); A plurality of suction nozzle assemblies (7) are provided on the top of the horizontal support plate (3); The inclined support plate (4) is also provided with a plurality of suction nozzle assemblies (7) on the top and is rotatably and adjustably connected between the horizontal support portion (101) and the adjustment support portion (102); A line scanning light source (12) is also provided on the side of the horizontal support portion (101), and the line scanning light source (12) is connected to the control device of the CCD screen pasting machine and is used to assist the bending type liquid crystal alignment film pasting and the mobile phone case pasting; A vertical support plate (19) is located directly above the alignment and laminating fixture and is provided with a lifting nozzle assembly (14), and the lifting nozzle assembly (14) is driven to rise and fall by a KK module (15) and a lifting servo motor (20); A lifting vision component (16) is supported on the vertical support plate (19) near the upper side of the adjustment support portion (102), and two industrial cameras (17) are provided at the bottom of the lifting vision component (16). Each industrial camera (17) acquires an image of a product supported on the alignment and bonding fixture through a telecentric lens (18); A height-adjusting pad (8), the bottom of which is fixed on the adjusting support portion (102), and the top of which is located on both sides of the inclined support plate (4) and is fixedly connected to both sides of the inclined support plate (4) via an adjusting ear piece (9), each adjusting ear piece (9) having an arc-shaped adjusting groove (91) at the center thereof for adjusting the angle of the inclined support plate (4) relative to the adjusting support portion (102); The top of the height-adjusting pad (8) extends close to the bottom of the inclined support plate (4), and the height-adjusting pad (8) is provided with an adaptive fitting inclined surface (81) that fits the bottom surface of the inclined support plate (4), and the adaptive fitting inclined surface (81) is located between two side surfaces of the height-adjusting pad (8) close to the bottom of the inclined support plate (4); A protruding rotating support block (103) is provided between the top of the horizontal supporting portion (101) and the adjusting supporting portion (102) of the supporting base (1), and the inclined supporting support plate (4) is connected to the rotating support block (103) via a rotating shaft (10) for rotation.

2. The CCD screen mounting machine for a foldable liquid crystal screen according to claim 1, characterized in that: The lifting vision component (16) is also connected to the vision component servo motor (21) via the KK module, and the lifting servo motor (20) and the vision component servo motor (21) are both connected to the control device.

3. The CCD screen mounting machine for a curved liquid crystal screen according to claim 1, characterized in that: A machine cover (22) is also provided above the machine base (13); an observation window (25) is provided on the machine cover (22) at a position directly opposite to the height range of the XYR high-precision alignment platform (2) and the alignment and bonding fixture; a display screen (23) and an emergency three-color light (24) are also provided on the machine cover (22); the display screen is used to display the fixing state and effect of the liquid crystal curved screen on the alignment and bonding fixture; and the emergency three-color light is used to alarm in an emergency.

4. The CCD screen mounting machine for a foldable liquid crystal screen according to claim 1, characterized in that: The arc-shaped adjustment groove (91) of each adjustment ear piece (9) is respectively fixed to the tilt support support plate (4) and the height adjustment pad (8) by a screw assembly.

5. The CCD screen mounting machine for a foldable liquid crystal screen according to claim 1, characterized in that: The outer edges of the horizontal support plate (3) and the inclined support plate (4) are also respectively provided with a horizontal limiting structure (31) and an inclined edge limiting structure (41) protruding from the top surfaces thereof.

6. A CCD screen mounting machine for a curved liquid crystal screen according to any one of claims 1 to 5, characterized in that: The XYR high-precision alignment platform (2) is also provided with an automatic horizontal loading component (11) on one side of the horizontal support portion (101) of the support base (1). The automatic horizontal loading component (11) drives a loading support plate (112) to reciprocate via a servo cylinder (111); the servo cylinder (111) is fixed to the side of the XYR high-precision alignment platform (2) via a cylinder support, thereby ensuring that the loading support plate (112) and the horizontal support plate (3) of the support base (1) are at corresponding positions.

7. The CCD screen mounting machine for a curved liquid crystal screen according to claim 6, characterized in that: A positioning protrusion structure (113) is also provided on the loading support plate (112).

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