Intelligent assembling device of liquid crystal display

Abstract

The intelligent assembling device comprises an assembling table and a temporary storage table, and a carrying mechanism is arranged between the assembling table and the temporary storage table; the carrying mechanism comprises a carrying base, a horizontal displacement assembly is arranged on the carrying base, a lifting assembly is arranged on a displacement table of the horizontal displacement assembly, a vacuum adsorption unit is arranged on a lifting table of the lifting assembly, the vacuum adsorption unit is provided with a vacuum suction cup, and the vacuum suction cup is used for adsorbing the liquid crystal panel on the temporary storage table. The vacuum suction cups which can be independently adjusted on the vacuum suction units are matched with the electric telescopic rods, the suction requirements of liquid crystal display panels of different sizes, thicknesses, shapes and structures can be met, fixing clamps of the back plate fixing assemblies can be adjusted through fixing lead screws so as to adapt to back plates of different specifications, the assembling device is wider in application range, and the assembling efficiency is improved. And various production requirements can be met, all the assemblies are automatically controlled by the control system, the intelligent degree is high, the production efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] The invention mainly relates to the technical field of liquid crystal display manufacturing, and in particular to an intelligent assembly device for a liquid crystal display. Background Art

[0002] LCD screens are widely used in consumer electronics, commercial displays, industrial control, medical equipment and other fields due to their many advantages such as high image display quality, energy saving and high efficiency, and long service life. Their market demand is growing. In the production process of LCD screens, the assembly of LCD screens is a complex process of combining multiple components into a complete display product. This process is crucial and directly affects the quality and production efficiency of the product.

[0003] The prior art discloses a multi-group synchronous positioning assembly device for a liquid crystal display screen, comprising an assembly table, a mounting cavity is provided on the top of the assembly table, a pair of synchronous shafts are installed in the mounting cavity, a synchronous belt is connected between the pair of synchronous shafts, a stepper motor is installed on the outside of the assembly table, the output end of the stepper motor is connected to the synchronous shaft by transmission, a plurality of limit blocks are installed on the top of the synchronous belt, a first fixed plate is connected to the top of the limit block by snap-fitting, a second fixed plate is connected to one side of the first fixed plate by a hinge, a connecting block is installed on one side of the second fixed plate, a fixing strip is installed on one side of the connecting block, a connecting seat is installed on the top of the assembly table, a receiving cavity is provided inside the connecting seat, a half toothed disc is installed in the receiving cavity, and a gear is meshed and connected to the outer side of the half toothed disc. The invention can position a pair of liquid crystal display screens and realize the assembly function at the same time to improve the assembly efficiency.

[0004] However, the above-mentioned assembly device is only optimized for LCD screens of a specific size, and cannot meet the assembly requirements of LCD screens of different sizes, thicknesses, special shapes, and structures, which greatly limits its scope of application. In addition, the device lacks a real-time intelligent detection mechanism during the assembly process and cannot promptly detect potential problems in the assembly process. Manual inspection can only be performed after assembly is completed, which increases the defective rate and inspection costs. Summary of the invention

[0005] The present invention mainly provides an intelligent assembly device for a liquid crystal display, which is used to solve the technical problems raised in the above background technology.

[0006] The technical solution adopted by the present invention to solve the above technical problems is: An intelligent assembly device for a liquid crystal display comprises an assembly platform and a buffering platform, wherein a transport mechanism is provided between the assembly platform and the buffering platform; The transport mechanism comprises a transport base, a horizontal displacement component is arranged on the transport base, a lifting component is arranged on the displacement platform of the horizontal displacement component, a vacuum adsorption unit is arranged on the lifting platform of the lifting component, and the vacuum adsorption unit is used to adsorb the liquid crystal panel on the cache platform.

[0007] Furthermore, the vacuum adsorption unit includes an adsorption base, and the bottom surface of the adsorption base is provided with a plurality of vacuum suction cups arranged in a matrix, and the top of each vacuum suction cup is connected to an electric telescopic rod.

[0008] Furthermore, the horizontal displacement component includes a displacement slide, a displacement screw is provided in the displacement slide, one end of the displacement screw is transmission-connected to the displacement motor, and the other end is rotationally connected to the inner wall of the displacement slide, and the displacement platform is sleeved on the displacement screw; the lifting component includes an electric lifting cylinder, and the lifting end of the electric lifting cylinder is connected to the lifting platform.

[0009] Furthermore, a back plate fixing component is provided on the assembly table, and the back plate fixing component includes a fixed base, a fixed slide groove is provided on the fixed base, a fixed screw rod is provided in the fixed slide groove, a fixing clamp is sleeved on the fixed screw rod, and one end of the fixed screw rod is rotatably connected to the inner wall of the fixed slide groove, and the other end is connected to a driven bevel gear, and the driven bevel gear is transmission-connected to the active bevel gear.

[0010] Furthermore, the active bevel gear is connected to the output end of the fixed motor through a coupling, and the fixed motor is arranged in the assembly table; a buffer pad and a pressure sensor are provided on the surface of the fixed fixture, and the buffer pad is made of elastic rubber material.

[0011] Furthermore, a visual inspection system is provided above the assembly table, and the visual inspection system includes an industrial camera. The industrial camera is electrically connected to the control system. Through an image processing algorithm, the industrial camera compares the captured image with a preset standard image, calculates the deviation between the current position of the liquid crystal panel and the ideal position, and feeds back the deviation to the control system.

[0012] Furthermore, the visual inspection system is also provided with a laser emitter, which emits a laser beam to the surface of the liquid crystal panel, and obtains the three-dimensional contour information of the liquid crystal panel by analyzing the reflection angle, light intensity distribution and other information of the laser beam, and then compares it with the preset standard contour data to determine the position deviation of the liquid crystal panel and feed it back to the control system.

[0013] Furthermore, the cache table is provided with an adsorption component, which includes a plurality of vacuum adsorption holes, and the vacuum adsorption holes are distributed on the cache table in a rectangular array to fix the liquid crystal panel on the cache table.

[0014] Furthermore, the assembly table, the buffer table and the transport mechanism are all electrically connected to a control system, and the control system includes a PLC controller, and the PLC controller is electrically connected to a pressure sensor and a temperature and humidity sensor, and the temperature and humidity sensor is arranged on the assembly table.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can adapt to the adsorption requirements of liquid crystal panels of different sizes, thicknesses, shapes and structures by means of independently adjustable vacuum suction cups on the vacuum adsorption unit in combination with electric telescopic rods. The fixing fixture of the back panel fixing assembly can be adjusted by a fixed screw rod to adapt to back panels of different specifications, so that the assembly device has a wider range of applications and can meet diversified production needs. In addition, each component is automatically controlled by a control system with a high degree of intelligence, thereby improving production efficiency and reducing costs.

[0016] 2. The present invention cooperates with the industrial camera and laser transmitter in the visual inspection system to monitor the position deviation of the liquid crystal panel in real time and feed it back to the control system. The control system controls the handling mechanism to fine-tune the position of the liquid crystal panel according to the deviation data until the ideal assembly position is reached. This greatly improves the assembly accuracy and effectively reduces the defective rate.

[0017] 3. The present invention can monitor the temperature and humidity data of the assembly environment in real time by setting the temperature and humidity sensor on the assembly table, and transmit the data to the PLC controller. Once the temperature and humidity exceed the appropriate range, the control system can promptly issue an alarm or take corresponding control measures to ensure the stability of the assembly environment, which helps to improve product quality and the reliability of the production process.

[0018] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a side view of the overall structure of the present invention; Figure 3 It is a top view of the overall structure of the present invention; Figure 4 It is a schematic diagram of the assembly platform structure of the present invention; Figure 5 is a cross-sectional view of a back panel fixing assembly of the present invention; Figure 6 It is a schematic diagram of the structure of the cache station of the present invention; Figure 7 Schematic diagram of the transport mechanism structure of the present invention Figure 8 It is a bottom view of the vacuum adsorption unit of the present invention.

[0020] Description of the drawings: 1. Assembly table; 2. Cache table; 3. Transport mechanism; 301. Transport base; 4. Control system; 401. PLC controller; 402. Pressure sensor; 403. Temperature and humidity sensor; 5. Horizontal displacement component; 501. Displacement slide; 502. Displacement screw; 503. Displacement motor; 504. Displacement table; 6. Lifting component; 601. Electric lifting cylinder; 602. Lifting table; 7. Vacuum adsorption unit; 701. Adsorption base; 702. Vacuum suction cup; 703. Electric telescopic rod; 8. Back panel fixing component; 801. Fixed slide; 802. Fixed screw; 803. Fixed fixture; 8031. Buffer pad; 804. Driven bevel gear; 805. Active bevel gear; 806. Fixed motor; 9. Visual inspection system; 901. Industrial camera; 902. Laser transmitter; 10. Adsorption component; 1001. Vacuum adsorption hole. DETAILED DESCRIPTION

[0021] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive. Example

[0022] Please refer to the attached Figure 1 , 2 , 3, 7, and 8, an intelligent assembly device for a liquid crystal display comprises an assembly platform 1 and a buffer platform 2, wherein a transport mechanism 3 is provided between the assembly platform 1 and the buffer platform 2; the transport mechanism 3 comprises a transport base 301, wherein the transport base 301 is provided with a horizontal displacement component 5, wherein the horizontal displacement component 5 comprises a displacement chute 501, wherein a displacement screw rod 502 is provided in the displacement chute 501, wherein one end of the displacement screw rod 502 is transmission-connected to a displacement motor 503, and the other end is rotationally connected to the inner wall of the displacement chute 501, and a displacement platform 504 is sleeved on the displacement screw rod 502, wherein the displacement motor 503 is transmission-connected to the displacement motor 503, and the other end is rotationally connected to the inner wall of the displacement chute 501, and the displacement platform 504 is sleeved on the displacement screw rod 502, wherein the displacement motor 503 is transmission-connected to the displacement motor 503, and the other end is rotationally connected to the inner wall of the displacement chute 501, wherein the displacement motor 503 is transmission-connected to the displacement motor 503, and the other end is rotationally connected to the inner wall of the displacement chute 501, and the displacement motor 503 is transmission-connected to the displacement motor 503 ... displacement motor 503, and the displacement motor 503 is transmission-connected to the displacement motor 50 A lifting component 6 is provided on the platform 504, and the lifting component 6 includes an electric lifting cylinder 601. The lifting end of the electric lifting cylinder 601 is connected to a lifting platform 602. The lifting platform 602 is provided with a vacuum adsorption unit 7. The vacuum adsorption unit 7 is used to adsorb the liquid crystal panel on the cache table 2; the assembly table 1, the cache table 2 and the conveying mechanism 3 are all electrically connected to the control system 4. The control system 4 includes a PLC controller 401. The PLC controller 401 is electrically connected to a pressure sensor 402 and a temperature and humidity sensor 403. The temperature and humidity sensor 403 is arranged on the assembly table 1.

[0023] It should be noted that when assembling, the vacuum adsorption unit 7 adsorbs the liquid crystal panel on the cache table 2 through the coordinated movement of the horizontal displacement component 5 and the lifting component 6, and moves it to the top of the display back panel on the assembly table 1. The vacuum adsorption unit 7 stops adsorption, and the assembly operation is carried out after the liquid crystal panel and the display back panel are attached.

[0024] It should be noted that the vacuum adsorption unit 7 includes an adsorption base 701, and the bottom surface of the adsorption base 701 is provided with a plurality of vacuum suction cups 702 arranged in a matrix, and the top of each vacuum suction cup 702 is connected to an electric telescopic rod 703; for some special shapes of liquid crystal panels (such as curved surfaces, etc.), the control system 4 adjusts the electric telescopic rod 703 through the adsorption force feedback from each vacuum suction cup 702, to ensure that each vacuum suction cup 702 exerts the same adsorption force on the liquid crystal panel, thereby improving the adsorption effect and ensuring that the vacuum adsorption unit 7 can adapt to the adsorption requirements of liquid crystal panels of different sizes, thicknesses, shapes and structures.

[0025] Please refer to the attached Figure 1 , 3 As shown in , 4 and 5, a back plate fixing component 8 is provided on the assembly table 1, and the back plate fixing component 8 includes a fixed base, a fixed slide groove 801 is provided on the fixed base, a fixed screw rod 802 is provided in the fixed slide groove 801, a fixing fixture 803 is sleeved on the fixed screw rod 802, and one end of the fixed screw rod 802 is rotatably connected to the inner wall of the fixed slide groove 801, and the other end is connected to a driven bevel gear 804, and the driven bevel gear 804 is transmission-connected to an active bevel gear 805, and the active bevel gear 805 is transmission-connected to the output end of a fixed motor 806 through a coupling, and the fixed motor 806 is arranged in the assembly table 1; a buffer pad 8031 ​​and a pressure sensor 402 are provided on the surface of the fixing fixture 803, and the buffer pad 8031 ​​is made of elastic rubber material.

[0026] It should be noted that, when the fixing motor 806 is started, the motor output shaft rotates to drive the active bevel gear 805 to rotate, and the active bevel gear 805 is meshed with the driven bevel gear 804, so that the driven bevel gear 804 drives the fixed screw 802 to rotate. Since the fixing fixture 803 is sleeved on the fixed screw 802, when the fixed screw 802 rotates, the fixing fixture 803 will move along the fixed slide groove 801, and the control system 4 monitors the fixing force in real time through the pressure sensor 402, controls the forward and reverse rotation and the number of rotations of the fixing motor 806, and accurately adjusts the position of the fixing fixture 803 to fix back panels of different sizes. In addition, the buffer pad 8031 ​​on the surface of the fixing fixture 803 has good elasticity, which can avoid hard damage when fixing the back panel, ensuring that the fixing process is both stable and will not damage the back panel due to excessive pressure, thereby improving the safety and reliability of assembly.

[0027] Please refer to the attached Figure 1 ,2 As shown in Figures 3 and 4, a visual inspection system 9 is provided above the assembly table 1. The visual inspection system 9 includes an industrial camera 901 and a laser emitter 902. The industrial camera 901 is electrically connected to the control system 4. The industrial camera 901 compares the captured image with a preset standard image through an image processing algorithm, calculates the deviation between the current position and the ideal position of the liquid crystal panel, and feeds it back to the control system 4; the laser emitter 902 emits a laser beam to the surface of the liquid crystal panel, and obtains the three-dimensional contour information of the liquid crystal panel by analyzing the reflection angle, light intensity distribution and other information of the laser beam, and then compares it with the preset standard contour data, thereby determining the position deviation of the liquid crystal panel and feeding it back to the control system 4.

[0028] It should be noted that the industrial camera 901 collects images of the liquid crystal panel on the assembly table 1 at a certain time interval or under specific trigger conditions. Its built-in image processing algorithm will first pre-process the collected image, such as noise reduction, contrast enhancement and other operations to improve image quality. Then the pre-processed image is compared pixel by pixel with the preset standard image, and the actual position of the liquid crystal panel in the image is found by calculating the gray value difference, color difference and other features of the corresponding pixel points. Then, according to the ideal position of the liquid crystal panel in the standard image, the position deviation is accurately calculated, such as the offset in the horizontal and vertical directions, the rotation angle deviation, etc., and these deviation data are fed back to the control system 4 in the form of electrical signals. The control system 4 controls the conveying mechanism 3 to adjust the position of the liquid crystal panel according to these deviation data until it reaches the ideal position.

[0029] It should be noted that the laser transmitter 902 emits a laser beam of a specific pattern to the surface of the liquid crystal panel. When the laser beam irradiates the surface of the liquid crystal panel, the laser beam will be reflected and scattered due to the different microstructures and geometric shapes of the panel surface. The receiver installed at a specific position will collect the reflected laser beam and analyze its reflection angle and light intensity distribution and other information. Through methods such as triangulation principle or laser flight time principle, these optical information are converted into three-dimensional coordinate data to construct a three-dimensional contour model of the liquid crystal panel. Then this three-dimensional contour model is compared with the preset standard contour data, the difference between the two is calculated, the position deviation of the liquid crystal panel in the three-dimensional space is determined, and the deviation information is fed back to the control system 4. Similarly, the control system 4 controls the conveying mechanism 3 to position and adjust the liquid crystal panel according to the deviation information.

[0030] It should be noted that the industrial camera 901 and the laser emitter 902 detect the liquid crystal panel from different angles. The industrial camera 901 focuses on the accurate recognition of the two-dimensional plane position and can detect tiny translation and rotation deviations; the laser emitter 902 focuses on obtaining the three-dimensional contour information of the liquid crystal panel, and can also accurately detect three-dimensional defects such as unevenness and warping on the panel surface. The two complement each other, greatly improving the accuracy and reliability of the detection, ensuring that the position accuracy of the liquid crystal panel during the assembly process meets the requirements of high-quality production, and by presetting different standard images and standard contour data, the visual inspection system 9 can adapt to the detection needs of liquid crystal panels of various models, sizes and specifications, improving the versatility and flexibility of the assembly device.

[0031] Please refer to the attached Figure 1 , 3 As shown in FIG. 6 , an adsorption component 10 is provided on the cache table 2. The adsorption component 10 includes a plurality of vacuum adsorption holes 1001. The vacuum adsorption holes 1001 are distributed on the cache table 2 in a rectangular array to fix the liquid crystal panel on the cache table 2.

[0032] It should be noted that in the assembly process of the liquid crystal display, the buffer table 2 is used as an area for temporarily storing liquid crystal panels, and its adsorption component 10 can ensure that the liquid crystal panel maintains the correct position and posture while waiting for assembly, so as to facilitate accurate grasping by the conveying mechanism 3. When adsorbing the liquid crystal panel, the vacuum adsorption unit 7 of the conveying mechanism 3 can accurately dock with the panel fixed on the buffer table 2, reduce grasping errors, improve handling efficiency and accuracy, and thus improve the overall assembly efficiency; the control system 4 can adjust the opening number and distribution range of the vacuum adsorption holes 1001 distributed in a rectangular array to adapt to liquid crystal panels of different sizes and shapes, thereby enhancing the adaptability of the entire assembly device to diversified products.

[0033] The specific operation process of the present invention is as follows: First, the liquid crystal panel to be assembled is placed on the buffer table 2. The adsorption component 10 of the buffer table 2 adjusts the opening quantity and range under the control system 4 to fix the liquid crystal panel to be assembled so that it maintains the correct position and posture. At the same time, the display backplane is installed on the backplane fixing component 8 of the assembly table 1. The control system 4 adjusts the position of the fixing fixture 803 according to the fixing force monitored by the pressure sensor 402 to fix the display backplane to be assembled. Then, the horizontal displacement assembly 5 and the lifting assembly 6 on the transport mechanism 3, driven by the control system 4, drive the vacuum adsorption unit 7 to a suitable position above the buffer table 2, and the vacuum suction cup 702 of the vacuum adsorption unit 7 adsorbs the liquid crystal panel, and the adsorption assembly 10 on the buffer table 2 stops adsorption. After that, the horizontal displacement assembly 5 and the lifting assembly 6 move in coordination to transport the liquid crystal panel to the top of the assembly table 1; Then, during the transportation process, the industrial camera 901 and the laser emitter 902 of the visual inspection system 9 above the assembly table 1 cooperate with each other to monitor the position deviation of the LCD panel in real time and feed back to the control system 4. The control system 4 controls the transportation mechanism 3 to fine-tune the position of the LCD panel according to these deviation data until it reaches the ideal assembly position. When the LCD panel reaches the ideal position above the display backplane, the vacuum adsorption unit 7 stops adsorption, the LCD panel and the display backplane are bonded, and the subsequent assembly operation begins to complete the assembly process of the LCD display.

[0034] The above is an exemplary description of the present invention in combination with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. An intelligent assembly device for a liquid crystal display, characterized in that: It comprises an assembly platform (1) and a buffer platform (2), wherein a transport mechanism (3) is provided between the assembly platform (1) and the buffer platform (2); The transport mechanism (3) comprises a transport base (301), a horizontal displacement assembly (5) being provided on the transport base (301), a lifting assembly (6) being provided on a displacement platform (504) of the horizontal displacement assembly (5), a lifting platform (602) of the lifting assembly (6) being provided with a vacuum adsorption unit (7), the vacuum adsorption unit (7) being provided with a vacuum suction cup (702), and the vacuum suction cup (702) being used for adsorbing the liquid crystal panel on the buffering platform (2).

2. The intelligent assembly device for a liquid crystal display according to claim 1, characterized in that: The vacuum adsorption unit (7) comprises an adsorption base (701), the bottom surface of the adsorption base (701) being provided with a plurality of vacuum suction cups (702) arranged in a matrix, and the top of each vacuum suction cup (702) being connected to an electric telescopic rod (703).

3. The intelligent assembly device for a liquid crystal display according to claim 1, characterized in that: The horizontal displacement assembly (5) comprises a displacement chute (501), a displacement screw rod (502) is arranged in the displacement chute (501), one end of the displacement screw rod (502) is transmission-connected to a displacement motor (503), and the other end is rotationally connected to the inner wall of the displacement chute (501), and the displacement platform (504) is sleeved on the displacement screw rod (502); The lifting assembly (6) comprises an electric lifting cylinder (601), and the lifting end of the electric lifting cylinder (601) is connected to the lifting platform (602).

4. The intelligent assembly device for a liquid crystal display according to claim 1, characterized in that: The assembly table (1) is provided with a back plate fixing assembly (8), the back plate fixing assembly (8) comprising a fixing base, the fixing base being provided with a fixing slot (801), the fixing slot (801) being provided with a fixing screw (802), the fixing screw (802) being sleeved with a fixing fixture (803), one end of the fixing screw (802) being rotatably connected to the inner wall of the fixing slot (801), the other end of the fixing screw (802) being connected to a driven bevel gear (804), the driven bevel gear (804) being transmission-connected to a driving bevel gear (805).

5. The intelligent assembly device for a liquid crystal display according to claim 4, characterized in that: The active bevel gear (805) is connected to the output end of a fixed motor (806) via a coupling, and the fixed motor (806) is arranged in the assembly platform (1); A buffer pad (8031) and a pressure sensor (402) are provided on the surface of the fixing fixture (803), and the buffer pad (8031) is made of an elastic rubber material.

6. The intelligent assembly device for a liquid crystal display according to claim 1, characterized in that: A visual inspection system (9) is provided above the assembly table (1). The visual inspection system (9) comprises an industrial camera (901). The industrial camera (901) is electrically connected to the control system (4). The industrial camera (901) compares a captured image with a preset standard image through an image processing algorithm, calculates a deviation between a current position of the liquid crystal panel and an ideal position, and feeds the result back to the control system (4).

7. The intelligent assembly device for a liquid crystal display according to claim 6, characterized in that: The visual inspection system (9) is further provided with a laser emitter (902), which emits a laser beam to the surface of the liquid crystal panel, and obtains three-dimensional contour information of the liquid crystal panel by analyzing information such as the reflection angle and light intensity distribution of the laser beam, and then compares it with preset standard contour data to determine the position deviation of the liquid crystal panel, and feeds it back to the control system (4).

8. The intelligent assembly device for a liquid crystal display according to claim 1, characterized in that: The cache table (2) is provided with an adsorption component (10), the adsorption component (10) comprising a plurality of vacuum adsorption holes (1001), the vacuum adsorption holes (1001) being distributed in a rectangular array on the cache table (2) for fixing the liquid crystal panel on the cache table (2).

9. The intelligent assembly device for a liquid crystal display according to claim 1, characterized in that: The assembly platform (1), the buffer platform (2) and the transport mechanism (3) are all electrically connected to a control system (4); the control system (4) comprises a PLC controller (401); the PLC controller (401) is electrically connected to a pressure sensor (402) and a temperature and humidity sensor (403); the temperature and humidity sensor (403) is arranged on the assembly platform (1).

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