Vacuum pressing mechanism for liquid crystal display panel

Abstract

The utility model discloses a vacuum press-fit mechanism for a liquid crystal display panel, which comprises a lower press-fit unit, an upper press-fit unit and a first linear driving module, and the upper press-fit unit and the first linear driving module are respectively connected onto a support frame. The lower pressing unit is located below the upper pressing unit and movably connected to the first linear driving module. The upper pressing unit comprises a first lifting module, a second lifting module, an upper pressing platform, a main pressing platform and a vacuum exhaust pipe. Wherein the first lifting module is used for driving the second lifting module and the upper pressing platform to ascend and descend, so that the upper pressing platform and a lower pressing platform in the lower pressing unit are attached in a hard-to-hard mode to form a closed cavity, meanwhile, the second lifting module can independently drive the main pressing platform to ascend and descend, the pressure applied to a base plate by the main pressing platform can be adjusted, and the pressure applied to the base plate by the main pressing platform can be adjusted. And the laminating pressure during vacuum pressure-maintaining laminating is adjusted, so that the situation that the upper substrate and the lower substrate are not tightly laminated due to too small pressure is avoided, and the situation that the substrates are damaged due to too large pressure is also avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to liquid crystal display screen manufacturing equipment technical field, concretely relates to a vacuum compression mechanism for liquid crystal display panel. BACKGROUND

[0002] In the cell segment process of the liquid crystal display panel, the thin film transistor array substrate (TFT substrate) and the color film substrate (CF substrate) need to be aligned and attached to form a liquid crystal display panel. With the development of industrial automation technology, some automatic alignment and attachment devices for aligning and attaching TFT substrates and color film substrates have been developed in the industry. The process of attachment includes substrate feeding, substrate alignment, pre-pressing attachment, vacuum pressure-keeping attachment, etc. The vacuum pressure-keeping attachment requires a special vacuum compression mechanism. The process of vacuum pressure-keeping attachment needs to be carried out in a vacuum environment. When the TFT substrate and the color film substrate are attached for a long time under low air pressure, the attachment of the upper and lower substrates may not be tight enough. Therefore, how to better control the pressure applied to the substrate during vacuum pressure-keeping attachment is a problem to be solved. SUMMARY

[0003] Therefore, the utility model provides a vacuum compression mechanism for liquid crystal display panel to solve the problem of how to better control the pressure applied to the substrate during vacuum pressure-keeping attachment.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A vacuum compression mechanism for liquid crystal display panel, characterized in that the vacuum compression mechanism comprises a lower compression unit, an upper compression unit and a first linear drive module, the upper compression unit and the first linear drive module are connected to a support frame respectively, and the lower compression unit is located below the upper compression unit and is movably connected to the linear drive module.

[0006] The lower compression unit comprises a UVW platform, a lower compression platform and a substrate stage, the UVW platform is connected to the mover of the first linear drive module, the lower compression platform is connected to the UVW platform, the lower compression platform is provided with a lower vacuum cavity, and the substrate stage is connected in the lower vacuum cavity.

[0007] The upper pressing unit comprises a first lifting module, a second lifting module, an upper pressing platform, a base pressing platform and a vacuum air pipe; the first lifting module is connected to the support rack through a first support; the second lifting module and the upper pressing platform are respectively and liftably connected to the output end of the first lifting module; the upper pressing platform is provided with an upper vacuum cavity; the base pressing platform is located in the upper vacuum cavity and is liftably connected to the output end of the second lifting module; and the vacuum air pipe is in communication with the upper vacuum cavity and is connected to an external vacuumizing mechanism.

[0008] In a preferred scheme, the lower pressing unit further comprises a heating plate connected in the lower vacuum cavity, and the substrate stage is connected to the heating plate.

[0009] In a preferred scheme, the lower pressing platform is provided with a recess at the edge of the lower vacuum cavity.

[0010] In a preferred scheme, the output end of the first lifting module is connected with a first driving plate, the second lifting module is liftably connected to the lower surface of the first driving plate, and the upper pressing platform is liftably connected to the first driving plate through a first connecting assembly and is located opposite to the second lifting module.

[0011] In a preferred scheme, the first connecting assembly comprises two connecting vertical plates and a connecting horizontal plate, the first ends of the two connecting vertical plates are respectively connected to the two ends of the first driving plate, the connecting horizontal plate is connected between the second ends of the two connecting vertical plates, and the upper pressing platform is connected below the connecting horizontal plate.

[0012] In a preferred scheme, the first connecting assembly further comprises a slide rail connected to the side walls of the support rack, and the connecting vertical plates are slidingly connected to the slide rail through sliding blocks.

[0013] In a preferred scheme, the connecting horizontal plate is slidingly connected with a plurality of guide columns, the plurality of guide columns are arranged on the connecting horizontal plate, and the upper pressing platform is connected to the lower ends of the plurality of guide columns.

[0014] In a preferred scheme, the guide columns are respectively provided with limiting portions at the two sides of the connecting horizontal plate.

[0015] In a preferred scheme, the output end of the second lifting module is connected with a second driving plate, and the base pressing platform is liftably connected to the lower surface of the second driving plate.

[0016] In the preferred solution, the lower surface of the second driving plate is connected with a lifting connecting shaft, the first end of the lifting connecting shaft is connected to the lower surface of the second driving plate, the second end of the lifting connecting shaft extends to the upper vacuum cavity through the upper pressing platform, the lower pressing platform is connected to the second end of the lifting connecting shaft, and the vacuum air exhaust pipe is a telescopic pipe and is sleeved on the lifting connecting shaft.

[0017] The vacuum pressing mechanism for the liquid crystal display panel provided in the embodiment of the utility model, wherein the upper pressing unit comprises a first lifting module, a second lifting module, an upper pressing platform and a lower pressing platform, the first lifting module drives the second lifting module and the upper pressing platform to lift, so that the upper pressing platform and the lower pressing platform in the lower pressing unit are hard-to-hard attached to form a sealed cavity, meanwhile, the second lifting module can independently drive the lower pressing platform to lift, the pressure of the lower pressing platform on the substrate can be adjusted, the attachment pressure during vacuum pressure attachment can be adjusted, the attachment of the upper and lower substrates is avoided from being not tight enough due to too small pressure, and the substrate is also avoided from being damaged due to too large pressure. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a top view of the alignment and attachment equipment in the utility model;

[0019] Figure 2 is a perspective view of the alignment and attachment equipment in the utility model;

[0020] Figure 3 is a perspective view of the alignment and attachment equipment in the utility model from another angle;

[0021] Figure 4 is a connection structure diagram of the lower pressing unit and the first linear driving module in the utility model;

[0022] Figure 5 is a structure diagram of the lower pressing unit in the utility model;

[0023] Figure 6 is a structure diagram of the upper pressing unit in the utility model;

[0024] Figure 7 is a structure diagram of the upper pressing unit in the utility model from another angle;

[0025] Figure 8 is a sectional view of the upper pressing unit in the utility model;

[0026] Figure 9 is a structure diagram of the pre-pressing mechanical hand mechanism in the utility model;

[0027] Figure 10 is a structure diagram of the visual positioning mechanism in the utility model;

[0028] Figure 11 is the top view of the visual positioning mechanism in the utility model;

[0029] Figure 12 is the structural schematic view of the feeding and overturning platform in the utility model;

[0030] Figure 13 is the structural schematic view of the moving mechanism in the utility model. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the utility model more clear, the specific embodiments of the utility model are described in detail below with reference to the drawings. The examples of these preferred embodiments are exemplified in the drawings. The embodiments of the utility model shown in the drawings and described according to the drawings are merely exemplary, and the utility model is not limited to these embodiments.

[0032] It should be noted that the same or similar numerals in the drawings of the embodiments of the utility model correspond to the same or similar components; in the description of the utility model, it should be understood that if the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, the terms describing the positional relationships in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the patent, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0033] Here, it should also be noted that, in order to avoid obscuring the utility model due to unnecessary details, only the structures and / or processing steps closely related to the scheme according to the utility model are shown in the drawings, and other details not closely related to the utility model are omitted.

[0034] The utility model embodiment provides a kind of vacuum pressing mechanism for liquid crystal display panel, also provide a kind of alignment laminating equipment comprising the vacuum pressing mechanism.

[0035] With reference to Figures 1 to 13 , the alignment laminating equipment mainly includes support rack 1 and is connected on the vacuum pressing mechanism 2 of support rack 1, feeding mechanism 3, visual positioning mechanism 4 and pre-pressing mechanical hand mechanism 5, the opposite sides of pre-pressing mechanical hand mechanism 5 are respectively provided with one vacuum pressing mechanism 2.

[0036] The vacuum pressing mechanism 2 comprises a lower pressing unit 21, an upper pressing unit 22 and a first linear driving module 23. The lower pressing unit 21 is used for receiving the first substrate 100 and can be moved between the upper pressing unit 22 and the pre-pressing mechanical hand mechanism 5 by the first linear driving module 23. The upper pressing unit 22 is configured to be pressed on the lower pressing unit 21 for vacuum pressing. The feeding mechanism 3 is used for receiving the second substrate 200. The pre-pressing mechanical hand mechanism 5 is used for grabbing the second substrate 200 from the feeding mechanism 3 and moving to the upper side of the lower pressing unit 21. The visual positioning mechanism 4 is arranged between the lower pressing unit 21 and the pre-pressing mechanical hand mechanism 5 and is used for visually positioning the first substrate 100 on the lower pressing unit 21 and the second substrate 200 on the pre-pressing mechanical hand mechanism 5. The lower pressing unit 21 adjusts the position of the first substrate 100 based on the visual positioning information obtained by the visual positioning mechanism 4 so that the first substrate 100 is accurately aligned with the second substrate 200. The pre-pressing mechanical hand mechanism 5 further pre-presses the second substrate 200 to the first substrate 100.

[0037] In the embodiment, the first substrate 100 is a thin film transistor array substrate (TFT substrate) and the second substrate 200 is a color film substrate (CF substrate).

[0038] In the embodiment, the vacuum pressing mechanism 2 comprises a lower pressing unit 21, an upper pressing unit 22 and a first linear driving module 23. The upper pressing unit 22 and the first linear driving module 23 are respectively connected to the support frame 1. The lower pressing unit 21 is located below the upper pressing unit 22 and is movably connected to the first linear driving module 23. The first linear driving module 23 is connected between the upper pressing unit 22 and the pre-pressing mechanical hand mechanism 5.

[0039] When the first substrate 100 is fed, the first linear driving module 23 drives the lower pressing unit 21 to move out from below the upper pressing unit 22, facilitating the feeding. After the feeding of the first substrate 100 is completed, the first linear driving module 23 drives the lower pressing unit 21 to move below the pre-pressing mechanical hand mechanism 5 for subsequent visual positioning, alignment adjustment and pre-pressing work. After the pre-pressing is completed, the first linear driving module 23 drives the lower pressing unit 21 to move below the upper pressing unit 22 for subsequent vacuum pressing work.

[0040] As a preferred scheme, the pre-pressing mechanical hand mechanism 5 is provided with one vacuum pressing mechanism 2 on each side, as described above. Therefore, in the embodiment, the pre-pressing mechanical hand mechanism 5 is provided with two vacuum pressing mechanisms 2, one on each side. Figure 3 andFigure 4 As shown, the first linear drive module 23 is a double-acting linear drive module, and two vacuum pressing mechanisms 2 share one first linear drive module 23, which is connected between two upper pressing units 22 and passes below the pre-pressing mechanical hand mechanism 5, and two lower pressing units 21 are movably connected to the first linear drive module 23 respectively, and each lower pressing unit 21 can independently move between the corresponding upper pressing unit 22 and the pre-pressing mechanical hand mechanism 5.

[0041] Specifically, as shown in Figure 5 The lower pressing unit 21 includes a UVW platform 211, a lower pressing platform 212, and a substrate stage 213, the UVW platform 211 is connected to the actuator of the linear drive module 23, the lower pressing platform 212 is connected to the UVW platform 211, the lower pressing platform 212 is provided with a lower vacuum cavity 214, and the substrate stage 213 is connected in the lower vacuum cavity 214. The substrate stage 213 is a vacuum adsorption platform, which can fix the first substrate 100 loaded above by vacuum adsorption. The lower pressing platform 212 is used as a supporting structure, and when vacuum pressure bonding is performed, the upper pressing unit 22 is pressed onto the surface of the lower pressing platform 212 to seal the lower vacuum cavity 214. The UVW platform 211 is used to adjust the positions of the lower pressing platform 212 and the substrate stage 213 above it, and further adjust the specific position of the first substrate 100 on the substrate stage 213, so that the first substrate 100 and the second substrate 200 can be accurately aligned.

[0042] In this embodiment, the lower pressing unit 21 further includes a heating plate 215, which is connected in the lower vacuum cavity 214, and the substrate stage 213 is connected to the heating plate 215. When vacuum pressure bonding is performed, the heating plate 215 heats the substrate stage 213, and further heats the first substrate 100, which can improve the bonding efficiency. Further, the edge of the lower pressing platform 212 located in the lower vacuum cavity 214 is provided with a recess 216, and generally, the periphery of the TFT substrate is connected with some circuit modules, and the recess 216 can be used to accommodate the circuit modules when vacuum pressure bonding is performed.

[0043] Specifically, as shown in Figure 3 , Figures 6 to 8As shown, in the embodiment, the upper pressing unit 22 mainly comprises a first lifting module 221, a second lifting module 222, an upper pressing platform 223, a pressing platform 224 and a vacuum air pipe 225. The first lifting module 221 is connected to the support rack 1 through a first support 220. The second lifting module 222 and the upper pressing platform 223 are respectively and independently connected to the output end of the first lifting module 221. The upper pressing platform 223 is provided with an upper vacuum cavity 226. The pressing platform 224 is located in the upper vacuum cavity 226 and is independently connected to the output end of the second lifting module 222. The vacuum air pipe 225 is in communication with the upper vacuum cavity 226 and is connected to an external vacuumizing mechanism.

[0044] When the upper pressing unit 22 is pressed onto the lower pressing unit 21 for vacuum pressure bonding, the upper pressing platform 223 is pressed onto the lower pressing platform 212. The upper vacuum cavity 226 and the lower vacuum cavity 214 form a closed cavity. The external vacuumizing mechanism forms a vacuum bonding environment by vacuumizing the closed cavity through the vacuum air pipe 225. The pressing platform 224 is pressed onto the second substrate 200 after pre-bonding, thereby providing bonding pressure.

[0045] Based on the vacuum pressing mechanism 2 provided in the above embodiment, the first lifting module 221 drives the second lifting module 222 and the upper pressing platform 223 to lift or lower, so that the upper pressing platform 223 and the lower pressing platform 212 are hard-to-hard bonded to form a closed cavity. Meanwhile, the second lifting module 222 can independently drive the pressing platform 224 to lift or lower, so as to adjust the pressure applied by the pressing platform 224 to the second substrate 200, thereby adjusting the bonding pressure during vacuum pressure bonding. In this way, the bonding of the upper and lower substrates can be made more compact without damaging the substrate.

[0046] It should be noted that, Figure 3 and Figure 7 The upper pressing unit 22 shown in FIGS. 1 to 5 is omitted from the part structure components connected between the first support 220 and the support rack 1 in order to better show the structure components inside the first support 220.

[0047] In the embodiment, the output end of the first lifting module 221 is connected with a first driving plate 227. The second lifting module 222 is independently connected to the lower surface of the first driving plate 227. The upper pressing platform 223 is independently connected to the lower surface of the first driving plate 227 through a first connecting assembly 6 and is located opposite to the second lifting module 222.

[0048] The first connecting assembly 6 comprises two connecting vertical plates 61 and a connecting horizontal plate 62. The first ends of the two connecting vertical plates 61 are connected to the two ends of the first driving plate 227 respectively. The connecting horizontal plate 62 is connected between the second ends of the two connecting vertical plates 61. The upper pressing platform 223 is connected below the connecting horizontal plate 62. Further, the first connecting assembly 6 further comprises slide rails 63 connected to the two side walls of the support rack 1. The connecting vertical plates 61 are slidingly connected to the slide rails 63 through slide blocks 64. By arranging the first connecting assembly 6, the lifting driving of the upper pressing platform 223 is more stable.

[0049] The connecting horizontal plate 62 is slidingly connected with a plurality of guide columns 65. The plurality of guide columns 65 are arranged on the connecting horizontal plate 62. The upper pressing platform 223 is connected to the lower ends of the plurality of guide columns 65. Further, the guide columns 64 are provided with limiting portions 66 on both sides of the connecting horizontal plate 62. By arranging the guide columns 65 and the corresponding limiting portions 66, the lifting driving of the upper pressing platform 223 has a certain buffer stroke.

[0050] In the embodiment, the output end of the second lifting module 222 is connected with a second driving plate 228. The lower pressing platform 224 is connected to the lower surface of the second driving plate 228 in a lifting manner.

[0051] Further, the lower surface of the second driving plate 228 is connected with a lifting connecting shaft 229. The first end of the lifting connecting shaft 229 is connected to the lower surface of the second driving plate 228. The second end of the lifting connecting shaft 229 extends through the upper pressing platform 223 into the upper vacuum cavity 226. The lower pressing platform 224 is connected to the second end of the lifting connecting shaft 229. The vacuum air pipe 225 is a telescopic pipe and is sleeved on the lifting connecting shaft 229. That is, the upper pressing platform 223 is provided with a through hole (not shown in the drawings). The second end of the lifting connecting shaft 229 extends into the upper vacuum cavity 226 through the through hole. Thus, the lifting driving of the lower pressing platform 224 in the upper vacuum cavity 226 is realized. The vacuum air pipe 225 is sleeved on the lifting connecting shaft 229. The through hole is used as a gas passage for vacuumizing.

[0052] Specifically, in the alignment and bonding device of the embodiment, as shown in FIG. 1, the alignment and bonding device comprises a support rack 1, a first lifting module 2, a second lifting module 222 and a vacuumizing module 3. Figure 9As shown, the pre-pressing mechanical hand mechanism 5 comprises a gantry 51, a second linear driving module 52, a third lifting module 53 and a grabbing assembly 54. The gantry 51 is connected to the support frame 1 and is arranged between the vacuum pressing mechanism 2 and the feeding mechanism 3. The second linear driving module 52 is connected to the gantry 51. The third lifting module 53 is movably connected to the second linear driving module 52. The grabbing assembly 54 is connected to the output end of the third lifting module 53.

[0053] The grabbing assembly 54 is used for grabbing the second substrate 200, for example, a vacuum adsorption grabbing assembly. The third lifting module 53 is used for driving the lifting of the grabbing assembly 54. The second linear driving module 52 drives the movement of the third lifting module 53, thereby driving the movement of the grabbing assembly 54. Thus, the second substrate 200 grabbed from the feeding mechanism 3 can be moved to the upper side of the lower pressing unit 21.

[0054] Specifically, in the alignment and bonding device of the embodiment, as shown in Figure 1 、 Figure 10 and Figure 11 The visual positioning mechanism 4 comprises a fourth lifting module 42, a third linear driving module 43 and a fourth linear driving module 44 connected to a support frame 41. The support frame 41 is connected to the support frame 1 and is located on the side of the pre-pressing mechanical hand mechanism 5. The fourth lifting module 42 is connected to the bottom of the support frame 41. The third linear driving module 43 is located on the top of the support frame 41 and is movably connected to the output end of the fourth lifting module 42. The fourth linear driving module 44 is movably connected to the output end of the third linear driving module 43. The output end of the fourth linear driving module 44 is provided with first and second driving blocks 441 and 442 which can move in opposite directions. The first and second driving blocks 441 and 442 are respectively connected with support arms 45. The ends of each support arm 45 are connected with a first CCD camera 46 with an upward facing lens and a second CCD camera 47 with a downward facing lens.

[0055] Wherein, after the lower pressing unit 21 loads the first substrate 100 and moves to the lower side of the pre-pressing mechanical hand mechanism 5, and the pre-pressing mechanical hand mechanism 5 grabs the second substrate 200 and moves to the upper side of the lower pressing unit 21, the support arm 45 is driven by the third linear drive module 43 to move into the space between the lower pressing unit 21 and the pre-pressing mechanical hand mechanism 5, the downward-facing second CCD camera 47 connected to the support arm 45 performs visual positioning on the first substrate 100, and the upward-facing first CCD camera 46 connected to the support arm 45 performs visual positioning on the second substrate 200. The lower pressing unit 21 adjusts the position of the first substrate 100 based on the above visual positioning information to accurately align the first substrate 100 with the second substrate 200. After alignment is complete, the third linear drive module 43 drives the support arm 45 to exit the space between the lower pressing unit 21 and the pre-pressing mechanical hand mechanism 5, and then the pre-pressing mechanical hand mechanism 5 pre-presses the second substrate 200 to the first substrate 100.

[0056] Wherein, the fourth lifting module 42 is mainly used to adjust the height of the first CCD camera 46 and the second CCD camera 47, and the fourth linear drive module 44 is mainly used to adjust the distance between the two first CCD cameras 46 and the two second CCD cameras 47, so that it can be suitable for visual positioning of substrates of different specifications.

[0057] The visual positioning mechanism 4 described above, the second CCD camera 47 used for visual positioning of the first substrate 100 and the first CCD camera 46 used for visual positioning of the second substrate 200 are synchronously displaced and driven, and can share the same reference position, thereby making the alignment adjustment of the first substrate 100 and the second substrate 200 more accurate.

[0058] Specifically, in the alignment and bonding device of the embodiment, as shown in Figure 2 The feeding mechanism 3 includes a feeding and overturning platform 31 and a moving mechanism 32, the moving mechanism 32 is connected between the feeding and overturning platform 31 and the pre-pressing mechanical hand mechanism 5, the feeding and overturning platform 31 is used to receive feeding of the second substrate 200 and perform overturning, and the moving mechanism 32 is used to receive the overturned second substrate 200 from the feeding and overturning platform 31 and move the second substrate 200 to the pre-pressing mechanical hand mechanism 5.

[0059] Specifically, as shown in Figure 12As shown, the loading and overturning platform 31 comprises a second support 311, a fifth lifting module 312, an overturning driving motor 313 and an overturning table 314. The second support 311 is connected to the support frame 1, the fifth lifting module 312 is connected to the second support 311, the overturning driving motor 313 is connected to the output end of the fifth lifting module 312, and the overturning table 314 is connected to the output end of the overturning driving motor 313.

[0060] The overturning table 314 is a vacuum adsorption platform, which receives and adsorbs the loading of the second substrate 200. The overturning driving motor 313 drives the overturning table 314 to overturn, so that the adhering surface of the second substrate 200 faces downward. The fifth lifting module 312 drives the overturning driving motor 313 to descend, and drives the overturning table 314 to send the second substrate 200 into the transfer mechanism 32 below.

[0061] Specifically, as shown in the figure, Figure 13 The transfer mechanism 32 comprises a bearing platform 321 and a fifth linear driving module 322. The fifth linear driving module 322 is connected between the loading and overturning platform 31 and the pre-pressing mechanical hand mechanism 5. The bearing platform 321 is movably connected to the fifth linear driving module 322. The fifth linear driving module 322 can drive the bearing platform 321 to move between the loading and overturning platform 31 and the pre-pressing mechanical hand mechanism 5, thereby realizing the transfer of the second substrate 200 to the pre-pressing mechanical hand mechanism 5.

[0062] The alignment and lamination device provided by the above embodiment is used for the alignment and lamination process of the TFT substrate and the CF substrate, which comprises the following steps:

[0063] S1, loading the TFT substrate to the lower pressing unit 21 of the first vacuum pressing mechanism 2.

[0064] S2, driving the lower pressing unit 21 loaded with the TFT substrate to move below the first end of the pre-pressing mechanical hand mechanism 5.

[0065] S3, loading the CF substrate to the loading and overturning platform 31, and sending the CF substrate into the transfer mechanism 32 after overturning by the loading and overturning platform 31.

[0066] S4, transferring the CF substrate to below the second end of the pre-pressing mechanical hand mechanism 5 by the transfer mechanism 32.

[0067] S5, the pre-pressing mechanical hand mechanism 5 grabs the CF substrate from the transfer mechanism 32 at the second end, and moves to the first end so that the CF substrate is above the TFT substrate.

[0068] S6, the visual positioning mechanism 4 drives the first CCD camera 46 and the second CCD camera 47 to move into the position between the lower pressing unit 21 and the pre-pressing mechanical hand mechanism 5, the image information obtained by the first CCD camera 46 is used to position the CF substrate on the pre-pressing mechanical hand mechanism 5, and the image information obtained by the second CCD camera 47 is used to position the TFT substrate on the lower pressing unit 21.

[0069] S7, the lower pressing unit 21 adjusts the position of the TFT substrate based on the visual positioning information in step S6 to accurately align the TFT substrate with the CF substrate.

[0070] S8, after the alignment is completed, the visual positioning mechanism 4 drives the first CCD camera 46 and the second CCD camera 47 to move out of the position between the lower pressing unit 21 and the pre-pressing mechanical hand mechanism 5, and the pre-pressing mechanical hand mechanism 5 pre-presses and adheres the CF substrate to the TFT substrate.

[0071] S9, after the pre-pressing and adhering is completed, the lower pressing unit 21 is driven to move below the upper pressing unit 22, and the upper pressing unit 22 is driven to press onto the lower pressing unit 21 to perform vacuum pressure bonding.

[0072] S10, while the first vacuum pressing mechanism 2 performs the vacuum pressure bonding operation, the TFT substrate is fed to the lower pressing unit 21 of the second vacuum pressing mechanism 2.

[0073] S11, the above steps S2 to S9 are repeated, and the second vacuum pressing mechanism 2 also performs the vacuum pressure bonding operation.

[0074] The alignment and adhering device provided in the above embodiment has two vacuum pressing mechanisms arranged on opposite sides of the pre-pressing mechanical hand mechanism, the lower pressing unit in the vacuum pressing mechanism can move between the upper pressing unit and the pre-pressing mechanical hand mechanism, and the two vacuum pressing stations can share the feeding mechanism, the visual positioning mechanism and the pre-pressing mechanical hand mechanism, when one of the vacuum pressing mechanisms performs the vacuum pressure bonding operation, the device can simultaneously perform the substrate feeding, substrate alignment, substrate pre-pressing and adhering and vacuum pressure bonding operations for the other vacuum pressing mechanism, thereby reducing the waiting time of the device and improving the production efficiency.

[0075] The above is only a specific embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should also be considered as the protection scope of the present application.

Claims

1. A vacuum pressing mechanism for a liquid crystal display panel, characterized by comprising: The vacuum pressing mechanism comprises a lower pressing unit, an upper pressing unit and a first linear driving module, the upper pressing unit and the first linear driving module are connected to a support frame respectively, and the lower pressing unit is located below the upper pressing unit and is movably connected to the linear driving module; The lower pressing unit comprises a UVW platform, a lower pressing platform and a substrate stage, the UVW platform is connected to the mover of the first linear driving module, the lower pressing platform is connected to the UVW platform, the lower pressing platform is provided with a lower vacuum cavity, and the substrate stage is connected in the lower vacuum cavity; The upper pressing unit comprises a first lifting module, a second lifting module, an upper pressing platform, a pressing platform and a vacuum air pipe, the first lifting module is connected to the support frame through a first support, the second lifting module and the upper pressing platform are connected to the output end of the first lifting module in a lifting manner respectively, the upper pressing platform is provided with an upper vacuum cavity, the pressing platform is located in the upper vacuum cavity and is connected to the output end of the second lifting module in a lifting manner, and the vacuum air pipe is in communication with the upper vacuum cavity and is connected to an external vacuumizing mechanism.

2. The vacuum press according to claim 1, wherein The lower pressing unit further comprises a heating plate, the heating plate is connected in the lower vacuum cavity, and the substrate stage is connected to the heating plate.

3. The vacuum press according to claim 2, wherein An avoiding groove is formed in the edge of the lower pressing platform located in the lower vacuum cavity.

4. The vacuum press according to any one of claims 1 to 3, characterized in that The output end of the first lifting module is connected with a first driving plate, the second lifting module is connected to the lower surface of the first driving plate in a lifting manner, and the upper pressing platform is connected to the first driving plate in a lifting manner through a first connecting assembly and is located below the second lifting module.

5. The vacuum press according to claim 4, wherein The first connecting assembly comprises two connecting vertical plates and a connecting horizontal plate, the first ends of the two connecting vertical plates are connected to the two ends of the first driving plate respectively, the connecting horizontal plate is connected between the second ends of the two connecting vertical plates, and the upper pressing platform is connected below the connecting horizontal plate.

6. The vacuum press according to claim 5, wherein, The first connecting assembly further comprises sliding rails connected to the side walls of the support frame, and the connecting vertical plates are connected to the sliding rails through sliding blocks.

7. The vacuum press according to claim 5, wherein A plurality of guide columns are connected to the connecting horizontal plate in a sliding manner, the guide columns are arranged on the connecting horizontal plate, and the upper pressing platform is connected to the lower ends of the guide columns.

8. The vacuum press according to claim 7, wherein Limiting portions are arranged on the two sides of the guide columns.

9. The vacuum press according to claim 4, wherein, The output end of the second lifting module is connected with a second driving plate, and the pressing platform is connected to the lower surface of the second driving plate in a lifting manner.

10. The vacuum press according to claim 9, wherein The lower surface of the second driving plate is connected with a lifting connecting shaft, the first end of the lifting connecting shaft is connected to the lower surface of the second driving plate, the second end of the lifting connecting shaft extends into the upper vacuum cavity through the upper pressing platform, the pressing platform is connected to the second end of the lifting connecting shaft, and the vacuum air pipe is a telescopic pipe and is sleeved on the lifting connecting shaft.

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