Glue injection process and device for screen

Abstract

The invention discloses a glue injection process and device for a screen, and the glue injection process comprises the steps: placing a display device to be subjected to glue injection and a container for containing glue in a vacuum chamber, discharging air in the vacuum chamber so as to enable the display device to be subjected to glue injection and the container for containing glue to be in a vacuum state, driving the display device to be subjected to glue injection to move, the method comprises the following steps: placing a container into a vacuum chamber, placing a to-be-filled part of a to-be-filled display device in the container, opening the vacuum chamber, enabling external gas to enter the vacuum chamber so as to fill the to-be-filled display device with glue under the action of pressure, taking out the filled display device, cleaning excessive glue on the filled display device, and finally curing the filled display device. The glue is extruded to the to-be-filled part of the display equipment through the air pressure difference inside and outside the vacuum chamber, the equipment used in the whole glue injection process is low in cost, the technological process is relatively simple, and the glue injection cost of a screen can be lower on the premise that the glue injection quality is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of glue injection packaging, and particularly to a glue injection process and device for a screen. Background Art

[0002] With the development of electronic technology, the competition among electronic products has become increasingly fierce, and the evolution of mobile phone screen forms has also shown a diversified trend. The full-screen design has become the mainstream. Currently, through processes such as COP Ultra, combined with an OLED panel, a part of the flexible OLED screen can be directly bent backward, so that the mobile phone frame can be narrowed to less than 1.5 mm, and the screen ratio can be further improved. For this reason, corresponding partition treatment needs to be done outside the screen package. For example, glue bonding is used between the whole machine housing and the screen cover plate to prevent water ingress. In order to reduce the black edge of the screen caused by the increased waterproof measures, the existing process will use a low-temperature injection molding process to surround the COP with glue at the COP part, achieving a smaller black edge of the display screen while meeting the waterproof performance. However, this process requires high-cost equipment and consumables, resulting in high costs.

[0003] Therefore, how to reduce the glue injection cost of the screen while ensuring the glue injection quality has become an urgent technical problem to be solved. Summary of the Invention

[0004] Based on the above situation, the main purpose of the present invention is to provide a glue injection process and device for a screen to reduce the glue injection cost of the screen while ensuring the glue injection quality.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] In the first aspect, an embodiment of the present invention discloses a glue injection process for a screen, including the following steps:

[0007] Step S100, placing the display device to be filled with glue and the container for holding the glue in a vacuum chamber;

[0008] Step S200, exhausting the gas in the vacuum chamber so that both the display device to be filled with glue and the container for holding the glue are in a vacuum state;

[0009] Step S300, driving the display device to be filled with glue to move so as to place the part to be filled with glue of the display device to be filled with glue in the container;

[0010] Step S400, opening the vacuum chamber to allow external gas to enter the vacuum chamber to inject glue into the display device to be filled with glue under the action of pressure;

[0011] Step S500, taking out the display device after glue injection, cleaning the overflow glue on the display device after glue injection and curing it.

[0012] Optionally, the step S100 includes:

[0013] Step S110, installing the display device to be potted in a jig and placing the jig in a vacuum chamber;

[0014] Step S120, containing glue with a preset depth in a container and placing the container containing the glue in the vacuum chamber.

[0015] Optionally, the step S300 includes:

[0016] Step S310, driving the jig to drive the display device to be potted to move so as to completely immerse the part to be potted of the jig and the display device to be potted in the glue contained in the container.

[0017] Optionally, the step S400 includes:

[0018] Step S410, when the part to be potted has been soaked in the container for a preset time, opening the vacuum chamber to allow external gas to enter the vacuum chamber to pot the display device to be potted under pressure.

[0019] Optionally, the vacuum chamber includes a first vacuum chamber and a second vacuum chamber separated by a partition, the first vacuum chamber and the second vacuum chamber can be independently controlled to evacuate, the container penetrates through the first vacuum chamber and the second vacuum chamber, and the step S300 includes:

[0020] Step S320, driving the display device to be potted to move, placing the part to be potted of the display device to be potted obliquely in the container so that one end of the part to be potted is located in the glue contained in the container and the other end of the part to be potted is located outside the glue contained in the container.

[0021] Optionally, the step S400 includes:

[0022] Step S420, opening the first vacuum chamber to allow external gas to enter the first vacuum chamber so that the glue contained in the container enters the second vacuum chamber under pressure to pot the display device to be potted.

[0023] Optionally, the step S400 includes:

[0024] Step S430, opening the vacuum chamber, and when it is detected that the air pressure in the vacuum chamber reaches a preset value, closing the vacuum chamber to pot the display device to be potted under a preset air pressure.

[0025] Second aspect, embodiments of the present invention disclose a glue injection device for a screen, which is used to implement the glue injection process for the screen as described in any one of the first aspects. The glue injection device for the screen includes:

[0026] A vacuum chamber and a container placed inside the vacuum chamber for containing glue. The display device to be potted is moved into the container for immersion potting.

[0027] Optionally, the vacuum chamber includes a first vacuum chamber and a second vacuum chamber separated by a partition. The first vacuum chamber and the second vacuum chamber can be independently controlled to evacuate air. The container partially passes through the first vacuum chamber and enters the second vacuum chamber, and a channel for the container to pass through is provided at the bottom of the partition. The height of the glue contained in the container is higher than the bottom height of the partition inside the container.

[0028] Beneficial effects:

[0029] According to the glue injection process for the screen disclosed in the embodiments of the present invention, the display device to be potted and the container containing glue are placed in a vacuum chamber, and the air in the vacuum chamber is exhausted so that both the display device to be potted and the container containing glue are in a vacuum state. The display device to be potted is driven to move so that the part to be potted of the display device to be potted is placed in the container. The vacuum chamber is opened to allow external gas to enter the vacuum chamber to pot the display device to be potted under pressure. The potted display device is taken out and the overflow glue on the potted display device is cleaned. Finally, the potted display device is cured. The glue is extruded to the part to be potted of the display device through the air pressure difference inside and outside the vacuum chamber. The equipment cost used in the entire glue injection process is relatively low and the process flow is relatively simple, which can reduce the glue injection cost of the screen while ensuring the glue injection quality.

[0030] Other beneficial effects of the present invention will be described in the specific implementation manners through the introduction of specific technical features and technical solutions. Those skilled in the art should be able to understand the beneficial technical effects brought by the technical features and technical solutions through these introductions. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The following will describe the preferred embodiments of a glue injection process and device for a screen of the present invention with reference to the drawings. In the drawings:

[0032] Figure 1 is a schematic flow chart of the steps of a glue injection process for a screen disclosed in this embodiment;

[0033] Figure 2 is a schematic frame structure diagram of a glue injection device for a screen disclosed in this embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The present invention will be described based on embodiments, but the present invention is not limited to these embodiments. In the following detailed description of the present invention, some specific details are described in detail. In order to avoid obscuring the essence of the present invention, well-known methods, processes, procedures, and components are not described in detail.

[0035] In addition, those of ordinary skill in the art should understand that the drawings provided herein are for illustrative purposes only, and the drawings are not necessarily drawn to scale.

[0036] Unless the context clearly requires otherwise, the words "including", "comprising", and the like in the whole specification and claims should be construed in an inclusive sense rather than an exclusive or exhaustive sense; that is, the meaning of "including but not limited to".

[0037] In the description of the present invention, it should be understood that the terms "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0038] In order to reduce the glue injection cost of the screen while ensuring the glue injection quality, this embodiment discloses a glue injection process for the screen. Please refer to Figure 1 , Figure 1 which is a schematic flow chart of the steps of a glue injection process for the screen disclosed in this embodiment. In addition, the embodiment of the present invention also discloses a glue injection device for the screen to implement the glue injection process for the screen. Please refer to Figure 2 , Figure 2 which is a schematic frame structure diagram of a glue injection device for the screen disclosed in this embodiment. As shown in Figure 2 , the glue injection device for the screen includes a vacuum chamber 11 and a container 12 for holding glue. The container 12 is placed in the vacuum chamber 11, and the display device to be potted is moved into the container 12 for immersion potting.

[0039] As shown in Figure 2As shown in the figure, the vacuum chamber 11 includes a first vacuum chamber 111 and a second vacuum chamber 112. The first vacuum chamber 111 and the second vacuum chamber 112 are separated by a partition 13, and the first vacuum chamber 111 and the second vacuum chamber 112 can independently control the evacuation of air to create a vacuum or relieve the vacuum. A passage for the container 12 to pass through is also provided on the partition 13. The container 12 partially passes through the first vacuum chamber 111 and enters the second vacuum chamber 112. In other words, the container 12 passes through the partition 13, with a part located in the first vacuum chamber 111 and a part located in the second vacuum chamber 112. Moreover, the height of the glue contained in the container 12 is higher than the height of the bottom of the partition 13 located inside the container 12. That is to say, the bottom of the part of the partition 13 located inside the container 12 does not contact the bottom of the container 12 but is at a certain height from the bottom of the container 12, and the depth of the glue contained in the container 12 is higher than this height, thereby isolating the air flow between the first vacuum chamber 111 and the second vacuum chamber 112 inside the container 12, and only allowing the glue to flow between the first vacuum chamber 111 and the second vacuum chamber 112 inside the container 12. Preferably, the height of the container 12 is greater than the height of the bottom of the partition 13 located inside the container 12, and the width of the container 13 is equal to the width of the passage provided on the partition 13 for the container 12 to pass through.

[0040] As Figure 1 shown in the figure, the glue injection process for the screen includes the following steps:

[0041] Step S100, place the display device to be potted and the container containing the glue in the vacuum chamber. In this embodiment, the display device to be potted can be the screen of an electronic device such as a mobile phone, a computer, or a tablet. The container containing the glue can be fixedly arranged in the vacuum chamber or can be removed from the vacuum chamber. In the specific implementation process, before placing the display device to be potted in the vacuum chamber, the display device to be potted can be pre-treated, such as cleaning and surface treatment operations on the display device to be potted.

[0042] In an alternative embodiment, step S100 includes:

[0043] Step S110: Install the display device to be potted in a jig and place the jig in a vacuum chamber. In this embodiment, the jig is used to precisely control the glue coverage area and shape, thereby reducing the screen black border, increasing the screen ratio, and enhancing the waterproof performance. For example, the glue can be strictly restricted to the target area (such as only covering the COP bending part) through a baffle structure, thereby compressing the size of the black border. Moreover, the jig only needs to outline the part to be potted. Thus, during vacuum potting, the glue can enter the part to be potted outlined by the jig in advance for potting, without the need to set specific potting molds according to the type, size, and shape of the display screen, and can also replace the complex injection molds required for traditional COP packaging, thereby improving the versatility of the jig during the potting process and greatly reducing the potting processing cost. In the specific implementation process, a control device is also provided in the vacuum chamber. The control device is connected to the jig, so that the control device can be used to control the movement of the jig, and then the jig drives the display device to be potted to move into the container containing the glue for soaking and potting.

[0044] Step S120: Place a preset depth of glue in the container and place the container containing the glue in the vacuum chamber. In this embodiment, a preset depth of glue is placed in the container. The glue can be UV glue or epoxy resin glue, which can be selected according to actual needs. The depth of the glue in the container can be selected according to needs or can fill the entire container.

[0045] Step S200: Exhaust the gas in the vacuum chamber so that both the display device to be potted and the container containing the glue are in a vacuum state. In this embodiment, since the display device to be potted and the container containing the glue have been placed in the vacuum chamber, when exhausting the gas in the vacuum chamber, the gas in the display device to be potted and the glue in the container can be exhausted together, thereby exhausting the air in the vacuum chamber to the greatest extent and making the vacuum chamber, the display device to be potted, and the glue all in a vacuum state. It can be understood that since some air in the glue may not be completely exhausted, the vacuum state mentioned here refers to a state close to vacuum, rather than necessarily requiring absolute vacuum.

[0046] Placing the display device to be potted and the container containing the glue in the vacuum chamber first and then evacuating the vacuum chamber can, after evacuation, exhaust the air remaining in the bent part of the display device to be potted, avoid internal bubbles from hindering the penetration of the glue and forming voids, and reduce the defective problems caused by trapped air. Moreover, the air in the glue can be exhausted together during evacuation, further reducing the bubble residue in the glue, so that during potting, the glue can penetrate more evenly into the display device without the interference of bubbles.

[0047] Step S300: Drive the display device to be potted to move so as to place the potted part of the display device to be potted into a container. In this embodiment, drive the display device to be potted to move so that the potted part in the display device to be potted is immersed in the glue contained in the container. In the specific implementation process, when immersing the potted part in the display device into the glue contained in the container, the immersion depth in the glue can be controlled according to the size of the potted part. That is to say, it is only necessary to completely immerse the potted part of the display device to be potted in the glue. If the immersion is too deep, other parts of the display device to be potted will also be stained with glue, which not only causes waste of glue but also increases the workload of subsequent glue cleaning. If the immersion is too shallow, the potting will be incomplete and there will be voids in the potted part. In the specific implementation process, a control device (such as a lifting device) can be used to control the movement of the fixture, and the fixture then drives the display device to be potted to move so that the potted part of the display device to be potted is placed in the container.

[0048] In an alternative embodiment, step S300 includes:

[0049] Step S310: Drive the fixture to drive the display device to be potted to move so as to completely immerse the fixture and the potted part of the display device to be potted in the glue contained in the container. In this embodiment, a control device can be used to control the movement of the fixture, and the fixture then drives the display device to be potted to move so that the potted part of the display device to be potted is completely immersed in the glue. In the specific implementation process, as long as the potted part of the display device to be potted and the fixture are completely immersed in the glue, the potted part of the display device to be potted can be immersed in the glue obliquely or vertically, and this is not limited. Immersing the fixture and the potted part of the display device to be potted in the glue together, using the fixture to define the flow area of the glue, so that the glue can only flow in the potted part of the display device to be potted and will not flow to other areas. And using the fixture to define the flow area of the glue can also ensure the potting quality of the potted part. In the specific implementation process, only one of the first vacuum chamber or the second vacuum chamber in the injection device of the screen shown in Figure 2 can be used for vacuum potting with glue bubbles, or the partition in the injection device of the screen shown in Figure 2 can be taken out, and the first vacuum chamber and the second vacuum chamber are used as a complete vacuum chamber for vacuum potting with glue bubbles.

[0050] In an alternative embodiment, step S300 includes:

[0051] Step S320: Drive the display device to be potted to move, and place the potted part of the display device to be potted obliquely in the container so that one end of the potted part is in the glue contained in the container and the other end of the potted part is outside the glue contained in the container. In this embodiment, asFigure 2 As shown, the display device to be potted is placed obliquely in the container, with one end inside the glue and the other end outside the glue. Under the subsequent pressure, the glue can spread from low to high, thus completing the potting. This potting method can control the potting amount to a certain extent, thereby reducing the workload of subsequent glue cleaning. In the specific implementation process, after installing the display device to be potted in the fixture, when placing it obliquely, one glue inlet of the fixture can be immersed in the glue, and the other glue inlet of the fixture is placed outside the glue.

[0052] Step S400: Open the vacuum chamber to allow external gas to enter the vacuum chamber to pot the display device to be potted under pressure. In this embodiment, a valve can be provided on the vacuum chamber. When the valve is opened, the vacuum chamber is opened and communicates with the environment outside the vacuum chamber. Due to the air pressure difference between the vacuum chamber and the external environment, external gas enters the vacuum chamber, so that the glue can be poured into the part to be potted under the action of atmospheric pressure, and the potting is completed according to the shape of the fixture and poured into the display screen package bend (also called within COP).

[0053] In an alternative embodiment, step S400 includes:

[0054] Step S410: When the part to be potted has been soaked in the container for a preset duration, open the vacuum chamber to allow external gas to enter the vacuum chamber to pot the display device to be potted under pressure. In this embodiment, soaking the part to be potted in the glue in the container for a preset duration enables the part to be potted to be fully immersed in the glue, thereby improving the potting effect when the vacuum chamber is opened for potting. In the specific implementation process, the soaking duration can be actually adjusted according to the size of the part to be potted, etc. If the soaking time is short, the immersion may be insufficient, affecting the effect after potting. If the soaking time is too long, the overall processing efficiency will be reduced. In the specific implementation process, only one of the first vacuum chamber or the second vacuum chamber in the screen potting device shown in Figure 2 can be used for vacuum potting, or the partition in the screen potting device shown in Figure 2 can be taken out, and the first vacuum chamber and the second vacuum chamber are used as a complete vacuum chamber for vacuum potting.

[0055] In an alternative embodiment, step S400 includes:

[0056] Step S420: Open the first vacuum chamber to allow external gas to enter the first vacuum chamber, so that the glue contained in the container enters the second vacuum chamber under pressure to fill the display device to be potted. In this embodiment, when the first vacuum chamber is opened, during the process of releasing the vacuum in the first vacuum chamber, the air pressure in the first vacuum chamber gradually increases, and the glue in the container will flow towards the second vacuum chamber under the action of the air pressure in the first vacuum chamber, and then enter the display device to be potted to fill the display device to be potted.

[0057] In an alternative embodiment, step S400 includes:

[0058] Step S430: Open the vacuum chamber, and when it is detected that the air pressure in the vacuum chamber reaches a preset value, close the vacuum chamber to fill the display device to be potted at the preset air pressure. In this embodiment, after the vacuum chamber is opened, the air pressure in the vacuum chamber can be continuously detected. When the air pressure in the vacuum chamber reaches the preset value, the vacuum chamber is closed, so as to fill the display device to be potted at the preset air pressure. It can be understood that the preset value can be a single value or a stepped multiple values. When the preset value is a stepped multiple values, when the air pressure in the vacuum chamber reaches each preset value, the vacuum chamber can be closed, so that the air pressure in the vacuum chamber is maintained at the current preset air pressure for injection, so that during the injection process, the glue can be stably pressed into the part to be potted, reducing bubbles and improving the injection quality.

[0059] Step S500: Take out the potted display device, clean the overflow glue on the potted display device and cure it. In this embodiment, the potted display device is taken out of the container, and then the overflow glue on the potted display device is cleaned. When cleaning the overflow glue, a white cloth can be used for wiping, so that the glue is only filled in the part to be potted, ensuring the filling effect of the glue and also preventing the glue from sticking to other areas and affecting the use of the display screen. In the specific implementation process, for the convenience of cleaning the overflow glue, the potted display device can also be taken out of the vacuum chamber and then the overflow glue is cleaned. After cleaning the overflow glue, the potted display device is cured to complete the injection process. In the specific implementation process, after curing, the cured display device can be inspected and tested.

[0060] In an alternative embodiment, the potted display device can be cured by light curing or low-temperature heating curing. In this embodiment, if the glue contained in the container is UV glue, light curing can be used for curing; if the glue contained in the container is epoxy resin glue, low-temperature heat curing can be used for curing. In the specific implementation process, if epoxy resin glue is used, the temperature can be controlled at 60°C - 80°C for curing, or an incubator or a vacuum eutectic furnace can be used to ensure the temperature uniformity during the curing process.

[0061] According to the glue injection process of the screen disclosed in the embodiments of the present invention, the display device to be injected with glue and the container for holding the glue are placed in a vacuum chamber, and the air in the vacuum chamber is exhausted so that both the display device to be injected with glue and the container for holding the glue are in a vacuum state. The display device to be injected with glue is driven to move so that the part to be injected with glue of the display device to be injected with glue is placed in the container. The vacuum chamber is opened to allow external gas to enter the vacuum chamber to inject glue into the display device to be injected with glue under pressure. The display device after injection is taken out and the overflow glue on the display device after injection is cleaned. Finally, the display device after injection is cured. The glue is extruded to the part to be injected with glue of the display device by the air pressure difference inside and outside the vacuum chamber. The equipment cost used in the whole glue injection process is relatively low and the process flow is relatively simple. It can reduce the glue injection cost of the screen on the premise of ensuring the glue injection quality.

[0062] Those skilled in the art can understand that, on the premise of no conflict, the above preferred solutions can be freely combined and superimposed. Among them, the flowcharts and block diagrams in the drawings illustrate the possible architectures, functions and operations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code, and the module, the program segment, or the part of code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order from that marked in the drawings. For example, two consecutive blocks shown may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and the combination of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or operations, or can be implemented by a combination of dedicated hardware and computer instructions. The numbers of the steps in this article are only for convenience of description and reference, and are not used to limit the front and back order. The specific execution order is determined by the technology itself, and those skilled in the art can determine various allowed and reasonable orders according to the technology itself.

[0063] Those skilled in the art can understand that, on the premise of no conflict, the above preferred solutions can be freely combined and superimposed.

[0064] It should be understood that the above embodiments are exemplary rather than restrictive. Without departing from the basic principles of the present invention, various obvious or equivalent modifications or substitutions made by those skilled in the art to the above details will be included within the scope of the claims of the present invention.

Claims

1. A glue injection process for a screen, characterized in that, It includes the following steps: Step S100: Place the display device to be potted and the container for holding glue in a vacuum chamber. Step S200: Exhaust the gas in the vacuum chamber so that both the display device to be potted and the container for holding glue are in a vacuum state. Step S300: Drive the display device to be potted to move so as to place the pottable part of the display device to be potted into the container. Step S400: Open the vacuum chamber to allow external gas to enter the vacuum chamber to pot the display device to be potted under pressure. Step S500: Take out the potted display device, clean the overflow glue on the potted display device and cure it.

2. The glue injection process for the screen according to claim 1, characterized in that, The step S100 includes: Step S110: Install the display device to be potted in a jig and place the jig in the vacuum chamber. Step S120: Hold glue in the container to a preset depth and place the container for holding glue in the vacuum chamber.

3. The glue injection process for the screen according to claim 2, characterized in that, The step S300 includes: Step S310: Drive the jig to drive the display device to be potted to move so as to completely immerse the pottable part of the jig and the display device to be potted into the glue held in the container.

4. The potting process of the screen according to claim 1, characterized in that, The step S400 includes: Step S410: When the pottable part has been soaked in the container for a preset period of time, open the vacuum chamber to allow external gas to enter the vacuum chamber to pot the display device to be potted under pressure.

5. The potting process of the screen according to claim 1, characterized in that, The vacuum chamber includes a first vacuum chamber and a second vacuum chamber separated by a partition. The first vacuum chamber and the second vacuum chamber can be independently controlled to evacuate. The container penetrates through the first vacuum chamber and the second vacuum chamber. The step S300 includes: Step S320: Drive the display device to be potted to move, and place the pottable part of the display device to be potted obliquely in the container so that one end of the pottable part is in the glue held in the container and the other end of the pottable part is outside the glue held in the container.

6. The glue injection process for the screen according to claim 5, characterized in that, The step S400 includes: Step S420: Open the first vacuum chamber to allow external gas to enter the first vacuum chamber so that the glue held in the container enters the second vacuum chamber under pressure to pot the display device to be potted.

7. The potting process of the screen according to any one of claims 1-7, characterized in that, The step S400 includes: Step S430: Open the vacuum chamber. When it is detected that the air pressure in the vacuum chamber reaches a preset value, close the vacuum chamber to pot the display device to be potted at a preset air pressure.

8. A glue injection device for a screen, characterized in that, For implementing the potting process of the screen as described in any one of claims 1-7, the potting device for the screen includes: A vacuum chamber (11) and a container (12) placed inside the vacuum chamber (11) for holding glue. The display device to be potted is moved into the container (12) for immersion potting.

9. The glue injection device for a screen according to claim 8, characterized in that, The vacuum chamber (11) includes a first vacuum chamber (111) and a second vacuum chamber (112) separated by a partition (13). The first vacuum chamber (111) and the second vacuum chamber (112) can be independently controlled for evacuation. The container (12) partially passes through the first vacuum chamber (111) and enters the second vacuum chamber (112). A passage for the container (12) to pass through is provided at the bottom of the partition (13). The height of the glue contained in the container (12) is higher than the height of the bottom of the partition (13) located inside the container (12).

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