Display panel substrate support apparatus and pre-conditioning method

Abstract

This invention relates to the field of display screen manufacturing technology, and more particularly to a display screen substrate support device and pre-adjustment method. The display screen substrate support device includes a robotic arm and M support structures, all of which are disposed on the support surface of the robotic arm. The length direction of the contact support members of the support structures is horizontal to support the horizontally placed display screen substrate. The minimum distance A between any two contact support members is ≤15cm. Each contact support member has a through-hole for heat insulation, and the thermal conductivity K of the contact support member is ≤0.3W / (mK). The top support portion of each contact support member contacts the display screen substrate, and the wall thickness of the top support portion is less than the maximum wall thickness of the remaining parts of the contact support member. The Young's modulus E of the contact support member satisfies 1.2GPa≤E≤3.3GPa. The adjustment base of the support structure is used to adjust the vertical height and horizontality of the contact support member. The pre-adjustment method is applied to the above-mentioned display screen substrate support device.

Description

Technical Field

[0001] This invention relates to the field of display screen manufacturing technology, and in particular to a display screen substrate support device and pre-adjustment method. Background Technology

[0002] In the manufacturing process of display substrates, the next step after the display substrate has been coated by the coating machine is to remove the solvent by depressurized drying. For example... Figure 1 As shown, a robotic arm 1' is typically used to pick up and place the display substrate. During the picking and placing process, the levelness, flatness, and temperature uniformity of the display substrate all affect the film thickness, thus impacting the quality of the display substrate. Currently, the pin top structure 2' of the robotic arm 1' is hemispherical. When the pin top structure 2' contacts the display substrate, the contact area is small, resulting in a large force between them, which easily causes pin mura, leading to uneven film thickness on the display substrate. Furthermore, the existing pin top structure 2' also poses a risk of scratching the back of the display substrate, further affecting product quality. Summary of the Invention

[0003] One objective of this invention is to provide a display substrate support device that can increase the contact area with the display substrate, avoid problems such as uneven film thickness and scratches on the back of the display substrate, and improve product quality.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A display substrate support device is provided, comprising:

[0006] A robotic arm having a support surface;

[0007] M support structures are provided on the support surface. Each support structure includes a contact support and an adjustment base. The contact support supports the horizontally placed display substrate. The length direction of each contact support is horizontal, and the length directions of any two contact supports coincide or are parallel. The minimum distance A between any two contact supports satisfies A≤15cm. Each contact support has a heat-insulating through hole along its own length direction. Each contact support has a top support portion that contacts the display substrate. The wall thickness of the top support portion is less than the maximum wall thickness of the other parts of the contact support. The thermal conductivity K of the material of the contact support satisfies K≤0.3W / (mK). The Young's modulus E of the material of the contact support satisfies 1.2GPa≤E≤3.3GPa. The adjustment base is used to adjust the vertical height and horizontality of the contact support. M is a positive integer greater than or equal to 2.

[0008] Optionally, each of the support structures further includes a fixed base for connecting the adjusting base and the contact support member. The fixed base has a limiting groove, the contact support member is disposed in the limiting groove, and the top support portion protrudes above the side wall of the limiting groove. The limiting groove contains curing adhesive, which covers the bottom outer wall of the contact support member.

[0009] Optionally, the outer wall of the contact support is a first circle in a cross-section perpendicular to its own length direction, and the depth B of the limiting groove and the diameter R of the first circle satisfy 0.2≤B / R≤0.5.

[0010] Optionally, the outer wall surface of the contact support is a first circle in a cross section perpendicular to its own length direction. Each support structure also includes a connecting base for connecting the adjusting base and the contact support. The connecting base has a supporting curved surface that fits the bottom outer wall surface of the contact support.

[0011] Optionally, along the first direction, the maximum external dimension of the connecting base is G, the diameter of the first circle is R, satisfying 0.5≤G / R≤1, the first direction is a horizontal direction and perpendicular to the length direction of the contact support.

[0012] Optionally, the outer wall of the contact support is a first circle in a cross-section perpendicular to its own length direction, and the diameter R of the first circle satisfies 15mm≤R≤20mm;

[0013] And / or, the contact support has a bottom reinforcement portion, the wall thickness C of which satisfies 2mm≤C≤3mm;

[0014] And / or, the wall thickness L of the top support portion satisfies 1mm≤L≤2mm.

[0015] Optionally, the density of the support structure located in the central region of the display substrate is F1, the density of the support structure located in the edge region of the display substrate is F2, and the density of the support structure located in the remaining region of the display substrate is F3, satisfying F1 > F2 > F3.

[0016] Optionally, the heat insulation through-hole is filled with heat insulation material, the thermal conductivity of which is less than that of the material of the contact support member, and the Young's modulus of which is less than or equal to that of the material of the contact support member.

[0017] Optionally, each of the support structures has at least two adjustment bases, which are spaced apart along the length of the contact support. Each adjustment base includes an adjustment rod and a bearing. The bearing is sleeved on the adjustment rod, and the outer ring of the bearing is connected to the contact support. The outer wall of the adjustment rod has an external thread, and the support surface has a threaded hole that matches the external thread.

[0018] Another objective of this invention is to provide a pre-adjustment method that can increase the contact area between the display substrate support device and the display substrate, avoid problems such as uneven film thickness and scratches on the back of the display substrate, and improve product quality.

[0019] To achieve this objective, the present invention adopts the following technical solution:

[0020] A pre-adjustment method is provided, applied to the aforementioned display substrate support device, the pre-adjustment method comprising:

[0021] Installation: The detection ends of M×N pressure detection devices are respectively installed on M contact supports, and each contact support has N detection ends;

[0022] Local leveling: Place the display substrate on the M contact supports and observe whether the N pressure values ​​of each contact support are consistent. If they are inconsistent, take the maximum value of the N pressure values ​​of a contact support as the standard and adjust the adjustment base of the contact support away from that point to increase the height of the contact support until the minimum and maximum values ​​of the N pressure values ​​of the contact support are consistent. Adjust in the above manner to make the N pressure values ​​of each contact support consistent.

[0023] Overall leveling: Increase the overall height of the contact support at the point of lowest pressure value until the pressure value at the contact support is consistent with the maximum value among the M×N pressure values. Then find the contact support at the point of lowest pressure value and increase its height. Continue this process until all M×N pressure values ​​are consistent. Remove the detection end to complete the pre-adjustment.

[0024] The beneficial effects of this invention are:

[0025] This invention provides a display substrate support device, including a robotic arm and M support structures, where M is a positive integer greater than or equal to 2. The robotic arm has a support surface, and the M support structures are all disposed on this support surface. Each support structure includes a contact support member and an adjustment base. The contact support members support the horizontally placed display substrate. The length direction of each contact support member is horizontal, thus increasing the contact area between the support structure and the display substrate. Furthermore, the length directions of any two contact support members coincide or are parallel, and the minimum distance A between any two contact support members satisfies A≤15cm, preventing deformation of the display substrate between the two contact support members and thus reducing flatness. Each contact support member has a through-hole extending along its length, and the thermal conductivity K of the contact support member material satisfies K≤0.3W / (mK), meaning the contact support member itself has poor thermal conductivity. The through-hole further weakens heat conduction between the contact support member and the display substrate, preventing temperature inconsistencies at different locations on the display substrate, ensuring consistent drying rates, and thereby improving the consistency of film thickness across the display substrate. Each contact support has a top support portion that contacts the display substrate. The wall thickness of the top support portion is less than the maximum wall thickness of the rest of the contact support. On one hand, the smaller wall thickness of the top support portion enhances its elastic deformation, further increasing the contact area between the contact support and the display substrate. On the other hand, the relatively large wall thickness of the rest of the contact support prevents excessive deformation at other locations, which could lead to connection failure with other connecting structures. The Young's modulus E of the contact support material satisfies 1.2 GPa ≤ E ≤ 3.3 GPa, ensuring that the elastic deformation of the contact support is neither too large (resulting in insufficient support strength) nor too small (resulting in a small increase in contact area). An adjustable base is used to adjust the vertical height and horizontality of the contact support, further ensuring the horizontal height and flatness of the display substrate. Therefore, this display substrate support device can increase the contact area with the display substrate, avoid problems such as uneven film thickness and scratches on the back of the display substrate, and improve product quality.

[0026] This invention also provides a pre-adjustment method applied to the aforementioned display substrate support device. The pre-adjustment method includes: installation: installing the detection ends of M×N pressure detection devices onto M contact supports, with each contact support having N detection ends; local leveling: placing the display substrate on the M contact supports and observing whether the N pressure values ​​of each contact support are consistent. If they are inconsistent, using the maximum value among the N pressure values ​​of a contact support as the standard, adjusting the adjustment base of the contact support away from that point to increase the height of the contact support until the minimum and maximum values ​​among the N pressure values ​​of the contact support are consistent. This adjustment is repeated to ensure that the N pressure values ​​of each contact support are consistent; overall leveling: raising the overall height of the contact support at the point of minimum pressure until the pressure value at the contact support is consistent with the maximum value among the M×N pressure values. Then finding the contact support at the point of minimum pressure and increasing its height, and so on, until all M×N pressure values ​​are consistent. Finally, removing the detection ends completes the pre-adjustment. This pre-adjustment method can increase the contact area between the display substrate support device and the display substrate, avoid problems such as uneven film thickness and scratches on the back of the display substrate, and improve product quality. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the operation of a display substrate support device in the prior art;

[0028] Figure 2 This is a top view of the display substrate support device and the display substrate provided in Embodiment 1 of the present invention;

[0029] Figure 3 This is a front view of the display substrate support device and the display substrate provided in Embodiment 1 of the present invention;

[0030] Figure 4 This is a left view of the display substrate support device and the display substrate provided in Embodiment 1 of the present invention;

[0031] Figure 5 This is a cross-sectional view of the support structure provided in Embodiment 1 of the present invention;

[0032] Figure 6 This is a left view of the display substrate support device and display substrate provided in Embodiment 2 of the present invention;

[0033] Figure 7 This is a cross-sectional view of the support structure provided in Embodiment 2 of the present invention;

[0034] Figure 8 This is a flowchart illustrating the pre-adjustment method provided in Embodiment 3 of the present invention.

[0035] Figure 1 middle:

[0036] 1' Robotic arm; 2' Pin top structure; 3' Display substrate.

[0037] Figures 2-6 middle:

[0038] 1. Robotic arm; 11. Support surface;

[0039] 2. Support structure; 21. Contact support component; 211. Insulation through hole; 212. Top support part; 213. Bottom reinforcement part; 214. Transition part; 22. Adjustable base; 221. Adjusting rod; 222. Bearing; 223. Connecting component; 23. Fixed base; 231. Limiting groove; 24. Curing adhesive; 25. Connecting base; 26. Insulation material;

[0040] 100. Display panel substrate support device; 200. Display panel substrate. Detailed Implementation

[0041] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0042] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0043] In this application, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0044] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0045] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0046] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0047] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0048] like Figure 1As shown, in the manufacturing process of display substrates, the next step after coating by the coating machine is to remove the solvent by depressurized drying. Generally, a robotic arm 1' is used to pick up and place the display substrate. During this process, the levelness, flatness, and temperature uniformity of the display substrate all affect the film thickness, thus impacting the quality of the display substrate. Currently, the pin top structure 2' of the robotic arm 1' is hemispherical. When the pin top structure 2' contacts the display substrate, the contact area is small, and the interaction force between them is large, easily causing pin mura and resulting in uneven film thickness on the display substrate. Furthermore, the existing pin top structure 2' also poses a risk of scratching the back of the display substrate, further affecting product quality.

[0049] Therefore, a display substrate support device 100 is provided to solve the above problems, increase the contact area with the display substrate 200, avoid problems such as uneven film thickness and scratches on the back of the display substrate 200, and improve product quality.

[0050] Example 1

[0051] like Figures 2-5 As shown, the display substrate support device 100 in this embodiment includes a robotic arm 1 and M support structures 2, where M is a positive integer greater than or equal to 2. The number of support structures 2 can be adjusted according to parameters such as the size and weight of the display substrate 200, and M can be 2, 3, 4, 5, 6, 7 or a larger positive integer.

[0052] The robotic arm 1 has a support surface 11, and M support structures 2 are all disposed on the support surface 11. Optionally, all M support structures 2 are connected to the support surface 11. Optionally, in this embodiment, all M support structures 2 are screwed to the support surface 11 to facilitate replacement of the support structures 2. If it is necessary to adjust the position of the support structures 2, threaded holes can be opened at different positions on the support surface 11. Of course, in other embodiments, if the position of the support structures 2 needs to be adjusted frequently, a matching groove and slider can be provided on the support surface 11, with the support structure 2 connected to the slider, to facilitate adjustment of the position of the support structure 2 on the support surface 11. The position of the slider relative to the groove can also be adjusted using a driving component to achieve automated adjustment of the support structure 2, ensuring adjustment accuracy and efficiency.

[0053] Each support structure 2 includes a contact support 21 and an adjustment base 22. The contact support 21 supports the horizontally placed display substrate 200. The adjustment base 22 is connected to the contact support 21 and is used to adjust the vertical height and horizontality of the contact support 21, further ensuring the horizontal height and flatness of the display substrate 200. Optionally, each support structure 2 includes one contact support 21 and at least two adjustment bases 22.

[0054] Since the display substrate 200 needs to be placed horizontally to ensure that the coating material layer thickness is consistent throughout and the overall film layer is uniform after drying, the length direction of each contact support 21 is horizontal. That is, the contact surface between the contact support 21 and the display substrate 200 also extends in the horizontal direction. Compared with point contact, the contact support 21 can increase the contact area with the display substrate 200.

[0055] Furthermore, the length directions of any two contact supports 21 coincide or are parallel. That is, the M contact supports 21 can be arranged sequentially at intervals along their own length direction, or sequentially at intervals along their own width direction. Alternatively, some of the M contact supports 21 can be arranged sequentially at intervals along their own length direction, forming multiple segments of contact supports 21 spaced apart on a straight line, while the straight line containing all the contact supports 21 is arranged sequentially at intervals along the width direction of the contact supports 21. The minimum distance A between any two contact supports 21 satisfies A ≤ 15cm, meaning the distance between the adjacent sides of two adjacent contact supports 21 spaced apart along their own width direction cannot exceed 15cm, and the distance between the two adjacent end faces of two adjacent contact supports 21 spaced apart along their own length direction also cannot exceed 15cm. These dimensional restrictions prevent deformation of the display substrate 200 located between two contact supports 21, thus preventing a decrease in flatness.

[0056] like Figure 3 As shown, each contact support 21 has a heat-insulating through hole 211 extending along its length. The thermal conductivity K of the material of the contact support 21 satisfies K≤0.3W / (mK), meaning that the thermal conductivity of the contact support 21 itself is poor. The heat-insulating through hole 211 can further weaken the heat conduction between the contact support 21 and the display substrate 200, preventing the temperature of the display substrate 200 in contact with the contact support 21 and the non-contact position from being inconsistent. Poor temperature consistency at different positions will lead to inconsistent drying rates, thereby affecting the film thickness after drying. Therefore, the above restrictions are beneficial to ensuring the consistency of film thickness at all parts of the display substrate 200.

[0057] Not only that, such as Figure 5As shown, each contact support 21 has a top support portion 212 that contacts the display substrate 200. The wall thickness of the top support portion 212 is less than the maximum wall thickness of the remaining parts of the contact support 21. On the one hand, the smaller wall thickness of the top support portion 212 increases its elastic deformation, further improving the contact area between the contact support 21 and the display substrate 200. On the other hand, the larger wall thickness of the remaining parts of the contact support 21 prevents excessive deformation at other locations, which could lead to connection failure with other connecting structures. It also prevents excessive changes in the overall height of the contact support 21 when the weight of the display substrate 200 changes, thus preventing changes in the distance between the display substrate 200 and the support surface 11 of the robotic arm 1, which could cause positional errors during docking with upstream and downstream components.

[0058] The Young's modulus E of the material of the contact support 21 satisfies 1.2 GPa ≤ E ≤ 3.3 GPa, ensuring that the elastic deformation of the contact support 21 is neither too large, resulting in insufficient support strength, nor too small, resulting in a small increase in contact area. It is understood that this display substrate support device 100 can increase the contact area with the display substrate 200, avoiding problems such as uneven film thickness and scratches on the back of the display substrate 200, thus improving product quality.

[0059] Optionally, the contact support 21 is made of polyimide. This material not only has high temperature resistance and long service life, but also meets the above-mentioned requirements for thermal conductivity and Young's modulus. While weakening the heat conduction between the contact support 21 and the display substrate 200, it ensures that the elastic deformation of the contact support 21 is not too large, resulting in insufficient support strength, nor too small, resulting in a small increase in contact area.

[0060] like Figure 5 As shown, optionally, in this embodiment, each support structure 2 further includes a fixed base 23, which is used to connect the adjusting base 22 and the contact support member 21. The fixed base 23 has a limiting groove 231, and the contact support member 21 is disposed in the limiting groove 231. Since the contact support member 21 extends horizontally and the limiting groove 231 is opened vertically upward, the contact support member 21 is horizontally disposed in the limiting groove 231. The bottom of the contact support member 21 is located in the limiting groove 231, and the top support part 212 is higher than the side wall of the limiting groove 231 to prevent it from contacting the side wall of the limiting groove 231 when the display substrate 200 is pressed down.

[0061] Optionally, to ensure that the position of the contact support 21 remains unchanged within the limiting groove 231, thereby ensuring that the contact support 21 does not move relative to the fixed base 23, the limiting groove 231 contains a curing adhesive 24. The curing adhesive 24 covers the bottom outer wall of the contact support 21 to increase the contact area between the curing adhesive 24 and the contact support 21, ensuring that the contact support 21 is firmly connected within the limiting groove 231. Optionally, there is a gap between the contact support 21 and the bottom of the limiting groove 231, ensuring that the bottommost surface of the contact support 21 also has adhesive, and this part is also firmly bonded to the bottom of the limiting groove 231. Optionally, the curing adhesive 24 can be a high-temperature resistant silicone adhesive, phenolic resin adhesive, urea-formaldehyde resin adhesive, high-temperature resistant epoxy adhesive, or polyimide adhesive.

[0062] like Figure 5 As shown, optionally, the outer wall surface of the contact support 21 is a first circle in the cross-section perpendicular to its own length direction, and the depth B of the limiting groove 231 and the diameter R of the first circle satisfy 0.2≤B / R≤0.5. When the ratio of the depth B of the limiting groove 231 to the diameter R of the first circle is less than 0.2, the ratio of the height of the cured adhesive 24 on the contact support 21 to the overall height of the contact support 21 will be too small. The cured adhesive 24 is insufficient to guarantee the connection strength of the contact support 21 at the bottom of the limiting groove 231, and the contact support 21 is prone to detaching from the cured adhesive 24 under force, resulting in unstable support. Moreover, along the length direction of the contact support 21, the height of the cured adhesive 24 varies to a certain extent, which may lead to localized low connection strength. Furthermore, the curing adhesive 24 can prevent deformation of the bottom of the contact support 21 to a certain extent, which helps to prevent excessive differences in the overall height change of the contact support 21 before and after compression when supporting display substrates 200 of different weights. Therefore, setting a certain height of curing adhesive 24 helps to expand the applicability of the support device. However, if the ratio of the depth B of the limiting groove 231 to the diameter R of the first circle is greater than 0.5, it may affect the deformation of the top support portion 212 of the contact support 21. In some cases, such as when the display substrate 200 is tilted, there is a risk that the side wall of the limiting groove 231 may come into contact with the display substrate 200. The side wall of the limiting groove 231 is thin and made of hard material, which can easily scratch the display substrate 200.

[0063] Optionally, the outer wall of the contact support 21 is a first circle in a cross-section perpendicular to its length, and the diameter R of the first circle satisfies 15mm≤R≤20mm. If the outer wall diameter of the contact support 21 is too small, it is not conducive to increasing the contact area between the contact support 21 and the display substrate 200. If the outer wall diameter of the contact support 21 is too large and the wall thickness remains unchanged, the diameter of the internal circular heat insulation through hole 211 will increase accordingly, and the overall height of the contact support 21 before and after compression will vary greatly. When supporting display substrates 200 of different weights, the height of the display substrate 200 will change, causing positional errors when docking with upstream and downstream components.

[0064] like Figure 5 As shown, optionally, the contact support 21 has a bottom reinforcing portion 213, and a transition portion 214 is provided between the bottom reinforcing portion 213 and the top support portion 212. The two transition portions 214 are located on the left and right sides respectively. The wall thickness of the end of the transition portion 214 near the top support portion 212 is the same as the wall thickness of the top support portion 212, and the wall thickness of the end of the transition portion 214 near the bottom reinforcing portion 213 is the same as the wall thickness of the bottom reinforcing portion 213. The wall thickness of the transition portion 214 itself changes gradually. Providing the transition portion 214 can prevent abrupt changes in wall thickness at a certain point. The stress deformation at the point of abrupt wall thickness change is the most severe, and long-term stress may lead to irreversible deformation or even cracking.

[0065] Optionally, to reduce the degree of deformation under stress on the bottom reinforcing part 213, the wall thickness C of the bottom reinforcing part 213 satisfies 2mm ≤ C ≤ 3mm. A wall thickness C of not less than 2mm prevents excessive deformation of the bottom reinforcing part 213, which could cause connection failure with other connecting structures. It also prevents excessive changes in the overall height of the contact support member 21 when the weight of the display substrate 200 changes, thus changing the distance between the display substrate 200 and the support surface 11 of the robotic arm 1, causing positional errors during docking with upstream and downstream components. A wall thickness C of not more than 3mm prevents excessive differences in wall thickness between the bottom reinforcing part 213 and the top support part 212, which could cause excessively severe local deformation of the contact support member 21 under stress, leading to irreversible deformation or even breakage under long-term stress. The wall thickness C of the bottom reinforcing part 213 is no more than 3mm, which can also prevent the top support part 212 from being too thick and failing to achieve the ideal thin-wall setting. This would result in the top support part 212 and the display substrate 200 having insufficient contact surface, thus failing to effectively solve the problems of uneven film thickness and scratches on the back of the display substrate 200.

[0066] Optionally, the wall thickness L of the top support portion 212 satisfies the condition 1mm ≤ L ≤ 2mm. A wall thickness L of not less than 1mm ensures the structural strength of the top support portion 212 and also prevents the wall thickness difference between the top support portion 212 and the bottom reinforcing portion 213 from being too large, thus preventing irreversible deformation or even bending and cracking due to excessive difference. A wall thickness L of not more than 2mm increases the contact area between the top support portion 212 and the display substrate 200, completely solving the problems of uneven film thickness and scratches on the back of the display substrate 200.

[0067] Optionally, the density of the support structure 2 located in the central region of the display substrate 200 is F1, and the central region is... Figure 2 In this embodiment, the central region of the display substrate 200 along its length is provided with three sets of support structures 2, with the highest density, to ensure that the center of the display substrate 200 does not sag. The density of the support structures 2 located at the edge region of the display substrate 200 is F2. The edge region refers to the regions located at the two ends of the display substrate 200 along its length. In this embodiment, a set of support structures 2 is provided at each of the two edge regions to ensure that the display substrate 200 at the two ends does not sag, but the density of the support structures 2 in the edge region is lower than that in the central region. The density of the support structures 2 located in the remaining regions of the display substrate 200 is F3. The remaining regions are the areas between the central region and the edge regions, and the density of the support structures 2 is the lowest, i.e., F1 > F2 > F3. In this embodiment, a set of support structures 2 is also provided in the remaining regions, but because the area is large, the density is lower than that in the edge regions.

[0068] Optionally, the heat insulation through-hole 211 is filled with heat insulation material 26. Filling with heat insulation material 26 can further reduce the thermal conductivity of the contact support 21, and further prevent heat exchange between the contact support 21 and the display substrate 200, thus preventing temperature inconsistencies across the display substrate 200. The thermal conductivity of the heat insulation material 26 is lower than that of the material of the contact support 21, thereby reducing heat exchange between the contact support 21 and the display substrate 200. The Young's modulus of the heat insulation material 26 is less than or equal to that of the material of the contact support 21, to prevent the heat insulation material 26 from internally supporting the contact support 21 and affecting the stress deformation of the top support portion 212 of the contact support 21, ensuring that the contact area between the top support portion 212 and the display substrate 200 is sufficiently large.

[0069] like Figure 4As shown, optionally, each support structure 2 has at least two adjusting bases 22, which are spaced apart along the length of the contact support member 21. Adjusting at least one adjusting base 22 can adjust the levelness of the contact support member 21, and adjusting all the adjusting bases 22 can adjust the overall height of the contact support member 21. Of course, two, three, four or more adjusting bases 22 can be provided, depending on the actual length of the contact support member 21.

[0070] like Figure 5 As shown, optionally, each adjusting base 22 includes an adjusting rod 221 and a bearing 222. The bearing 222 is sleeved on the adjusting rod 221, that is, the inner ring of the bearing 222 is connected to the adjusting rod 221, and the outer ring of the bearing 222 is connected to the contact support member 21. The outer wall of the adjusting rod 221 has external threads, and the support surface 11 has a threaded hole adapted to the external threads. That is, when the adjusting rod 221 rotates relative to the support surface 11, the height of the adjusting rod 221 above the support surface 11 will change, thereby driving the contact support member 21 to move, and causing its distance from the support surface 11 to change.

[0071] To facilitate the connection between the outer ring of the bearing 222 and the fixed base 23, each adjusting base 22 may optionally include a connector 223 for connecting the fixed base 23 and the outer ring of the bearing 222. Optionally, the connector 223 is connected to the vertically downward-facing bottom surface of the fixed base 23, and a clearance groove is formed on the vertically downward-facing surface of the connector 223. A positioning groove is formed on the side wall of the clearance groove. The outer ring of the bearing 222 is embedded in the positioning groove, and the upper and lower end faces of the outer ring of the bearing 222 respectively contact the upper and lower side walls of the positioning groove to ensure that the position of the bearing 222 relative to the connector 223 remains unchanged. Optionally, the connector 223 may be connected to the bottom surface of the fixed base 23 by welding, bonding, or screwing, which will not be elaborated further here.

[0072] Optionally, another positioning groove is provided on the outer wall of the adjusting rod 221, and the inner ring of the bearing 222 is embedded in the positioning groove. The upper and lower end faces of the inner ring of the bearing 222 respectively contact the upper and lower side walls of the positioning groove to ensure that the position of the bearing 222 relative to the adjusting rod 221 remains unchanged.

[0073] Optionally, in other embodiments, a buffer film may be wrapped around the top outer side of the contact support 21 to further increase the contact area with the display substrate 200 and balance the force within the contact area. Optionally, the buffer film may be made of rubber, silicone, or polyurethane, etc.

[0074] Alternatively, in other embodiments, the contact support 21 may be configured as a tubular structure with a special shape. For example, a groove may be opened on the outer side of the top end of the top support 212. The groove is opened through the length direction of the contact support 21, which can increase the contact area between the contact support 21 and the display substrate 200 and balance the force on the display substrate 200 within the contact area.

[0075] Alternatively, in other embodiments, multiple dot-shaped micro-grooves may be formed on the outer side of the top of the contact support 21, which may increase the contact area between the contact support 21 and the display substrate 200 and balance the force on the display substrate 200 within the contact area.

[0076] Optionally, the display substrate support device 100 may also be equipped with a detection unit to detect deformation or vibration of the display substrate 200 during transportation caused by insufficient support force of a certain contact support member 21, so as to adjust the contact support member 21 with insufficient height or poor levelness in real time to ensure that the display substrate 200 is placed horizontally.

[0077] Example 2

[0078] This embodiment discloses a display substrate support device 100, such as... Figures 6-7 As shown, the display substrate support device 100 in this embodiment differs from the display substrate support device 100 in Embodiment 1 in that: the outer wall surface of the contact support member 21 is still a first circle in the cross-section perpendicular to its own length direction, but each support structure 2 also includes a connecting base 25, which is used to connect the adjusting base 22 and the contact support member 21, and the fixed base 23 is no longer provided. The connecting base 25 has a supporting curved surface, which is set to fit the bottom outer wall surface of the contact support member 21. Optionally, the contact support member 21 is bonded to the supporting curved surface of the connecting base 25. It is known that the side of the fixed base 23 can limit the contact support member 21, while the connecting base 25 can provide more support for the bottom reinforcing part 213. Of course, in another embodiment, the advantages of the fixed base 23 and the connecting base 25 can be combined. A vertically upward support column extending along the length direction of the contact support member 21 is provided at the bottom of the limiting groove 231 of the fixed base 23. The end face of the support column is set as a support curved surface, which can also support and strengthen the bottom reinforcing part 213 of the contact support member 21.

[0079] Optionally, along the first direction, the maximum external dimension of the connecting base 25 is G, and the diameter of the first circle is R, satisfying 0.5≤G / R≤1. The first direction is horizontal and perpendicular to the length direction of the contact support 21. Figure 7As shown, the first direction is the ab direction in the figure. The ratio of the maximum external dimension G of the connecting base 25 to the diameter R of the first circle is not less than 0.5, which ensures that the area of ​​the supporting curved surface is large enough, making the connection between the connecting base 25 and the contact support 21 more secure. When the contact support 21 is subjected to a force in the tilting direction, the connecting base 25 can also support the contact support 21, preventing the contact support 21 from detaching from the connecting base 25. The ratio of the maximum external dimension G of the connecting base 25 to the diameter R of the first circle is not greater than 1, which can reduce material consumption and lower the cost of the device while ensuring the supporting capacity of the connecting base 25.

[0080] Apart from the above, the remaining structure of the display substrate support device 100 provided in this embodiment is the same as that of the display substrate support device 100 in Embodiment 1, and will not be described again here.

[0081] Example 3

[0082] This embodiment discloses a pre-adjustment method, such as Figure 8 As shown, the pre-adjustment method of this embodiment is applied to the display substrate support device 100 in Embodiment 1 or Embodiment 2.

[0083] To ensure the display substrate 200 is placed perfectly horizontally, with each contact support 21 providing adequate support and a relatively even supporting force, the display substrate support device needs to be pre-adjusted before production. This embodiment uses pressure measurement; as long as the pressure on each contact support 21 is consistent, it indicates that the top of each contact support 21 is on a horizontal plane, ensuring the display substrate is placed horizontally and that there are no issues such as deformation or vibration caused by incomplete contact at any support position.

[0084] The pre-adjustment method includes three steps: installation, local leveling, and overall leveling.

[0085] First, the detection ends of M×N pressure detection devices are respectively installed on M contact supports 21, and each contact support 21 has N detection ends. Optionally, N can be a positive integer of 1, 2, 3, 4 or larger, and the value of N can be selected according to the length of the contact support 21. Optionally, the pressure detection device adopts a flexible thin-film pressure sensor. It is known that using a flexible thin-film pressure sensor can ensure high-precision pressure detection, and ensure that the display substrate is placed horizontally to the greatest extent and there is no local deformation, thereby ensuring that the film thickness of the display substrate is consistent after drying.

[0086] Then, local leveling is performed. A whole display substrate 200 is placed on the M contact supports 21, and the M×N pressure values ​​are observed. It is noted whether the N pressure values ​​of each contact support 21 are consistent. If they are inconsistent, it indicates that the contact support 21 does not extend horizontally, meaning it has a certain tilt angle. At this point, adjustments are made to ensure that the N pressure values ​​of each contact support 21 are consistent. The pressure values ​​of different contact supports 21 can be different. The principle of adjustment is to use the maximum value among the N pressure values ​​of a contact support 21 as the standard, and adjust the adjustment rod 221 of that contact support 21 away from that point to increase the height of the adjustment rod 221 above the support surface 11 until the minimum and maximum values ​​among the N pressure values ​​of the contact support 21 are consistent. Local leveling is performed according to the above principle to ensure that the N pressure values ​​of each contact support 21 are consistent.

[0087] Then, perform overall leveling, adjusting the overall height of the contact support 21 at the point of minimum pressure so that the pressure value at that contact support 21 matches the largest pressure value among the M×N pressure values. Next, find the contact support 21 at the point of minimum pressure and increase its height until the pressure value at that contact support 21 matches the largest pressure value among the M×N pressure values. Continue this process until all M×N pressure values ​​are consistent, indicating that all M contact supports 21 extend horizontally and their tops are at the same height. Finally, remove all the testing ends; the pre-adjustment is complete, and the display substrate support device 100 is ready for production use.

[0088] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A display screen substrate support device, characterized in that, include: A robotic arm (1) having a support surface (11); M support structures (2) are provided on the support surface (11). Each support structure (2) includes a contact support (21) and an adjustment base (22). The contact support (21) is used to support the horizontally placed display substrate (200). The length direction of each contact support (21) is horizontal, and the length directions of any two contact supports (21) coincide or are parallel. The minimum distance A between any two contact supports (21) satisfies that A≤15cm. Each contact support (21) has a heat insulation through hole through its own length direction. 211), each of the contact support members (21) has a top support portion (212), the top support portion (212) contacts the display substrate (200), the wall thickness of the top support portion (212) is less than the maximum wall thickness of the other positions of the contact support member (21), the thermal conductivity K of the material of the contact support member (21) satisfies K≤0.3W / (mK), the Young's modulus E of the material of the contact support member (21) satisfies 1.2GPa≤E≤3.3GPa, the adjusting base (22) is used to adjust the vertical height and horizontality of the contact support member (21), M is a positive integer greater than or equal to 2.

2. The display substrate support device according to claim 1, characterized in that, Each of the support structures (2) further includes a fixed base (23) for connecting the adjusting base (22) and the contact support (21). The fixed base (23) has a limiting groove (231). The contact support (21) is disposed in the limiting groove (231), and the top support (212) is higher than the side wall of the limiting groove (231). The limiting groove (231) contains curing adhesive (24), and the curing adhesive (24) covers the bottom outer wall of the contact support (21).

3. The display substrate support device according to claim 2, characterized in that, The outer wall of the contact support (21) is a first circle in the cross section perpendicular to its own length direction, and the depth B of the limiting groove (231) and the diameter R of the first circle satisfy 0.2≤B / R≤0.

5.

4. The display substrate support device according to claim 1, characterized in that, The outer wall of the contact support (21) is a first circle in the cross section perpendicular to its own length direction. Each support structure (2) also includes a connecting base (25). The connecting base (25) is used to connect the adjusting base (22) and the contact support (21). The connecting base (25) has a supporting curved surface, which is set to fit the bottom outer wall of the contact support (21).

5. The display substrate support device according to claim 4, characterized in that, Along the first direction, the maximum external dimension of the connecting base (25) is G, the diameter of the first circle is R, and 0.5≤G / R≤1 is satisfied. The first direction is horizontal and perpendicular to the length direction of the contact support (21).

6. The display substrate support device according to any one of claims 1-5, characterized in that, The outer wall of the contact support (21) is a first circle in the cross section perpendicular to its own length direction, and the diameter R of the first circle satisfies 15mm≤R≤20mm; And / or, the contact support (21) has a bottom reinforcement (213) and the wall thickness C of the bottom reinforcement (213) satisfies 2mm≤C≤3mm; And / or, the wall thickness L of the top support (212) satisfies 1mm≤L≤2mm.

7. The display substrate support device according to any one of claims 1-5, characterized in that, The density of the support structure (2) located in the central region of the display substrate (200) is F1, the density of the support structure (2) located in the edge region of the display substrate (200) is F2, and the density of the support structure (2) located in the remaining region of the display substrate (200) is F3, satisfying F1>F2>F3.

8. The display substrate support device according to any one of claims 1-5, characterized in that, The heat insulation through hole (211) is filled with heat insulation material (26), the thermal conductivity of the heat insulation material (26) is less than the thermal conductivity of the material of the contact support (21), and the Young's modulus of the heat insulation material (26) is less than or equal to the Young's modulus of the material of the contact support (21).

9. The display substrate support device according to any one of claims 1-5, characterized in that, Each of the support structures (2) has at least two adjustment bases (22), which are spaced apart along the length of the contact support (21). Each adjustment base (22) includes an adjustment rod (221) and a bearing (222). The bearing (222) is sleeved on the adjustment rod (221), and the outer ring of the bearing (222) is connected to the contact support (21). The outer wall of the adjustment rod (221) has an external thread, and the support surface (11) has a threaded hole that matches the external thread.

10. A pre-adjustment method, characterized in that, The pre-adjustment method, applied to the display substrate support device as described in any one of claims 1-9, comprises: Installation: The detection ends of M×N pressure detection devices are respectively installed on M contact supports (21), and each contact support (21) has N detection ends; Local leveling: Place the display substrate (200) on the M contact supports (21), and observe whether the N pressure values ​​of each contact support (21) are consistent. If they are inconsistent, take the maximum value of the N pressure values ​​of a contact support (21) as the standard, and adjust the adjustment base (22) of the contact support (21) away from the point to increase the height of the contact support (21) until the minimum value of the N pressure values ​​of the contact support (21) is consistent with the maximum value. Adjust in the above manner to make the N pressure values ​​of each contact support (21) consistent. Overall leveling: Increase the overall height of the contact support (21) at the point of minimum pressure value until the pressure value at the contact support (21) is consistent with the maximum value among the M×N pressure values. Then find the contact support (21) at the point of minimum pressure value and increase the height of the contact support (21). Continue in this manner until all M×N pressure values ​​are consistent. Remove the detection end to complete the pre-adjustment work.

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