Pressing device

Abstract

This application discloses a pressing device, belonging to the field of display technology. The pressing device may include a support platform and a pressing assembly. In this embodiment, by providing a first venting groove communicating with a second clearance groove in the pressing head, air between the protective tape and the electronic components can be discharged through the first venting groove. This prevents air from flowing towards the driver chip side of the bonding area, and wrinkles will not appear on the side of the driver chip facing the bending area of ​​the display panel. Furthermore, during the LiPo process, the airtightness of the display module will not be affected by wrinkles.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a pressing device. Background Technology

[0002] In the assembly process of the display module, the bending area of ​​the display panel is bent, and the flexible circuit board, which is bonded to the bonding area of ​​the display panel, is attached to the back of the display panel. After this, protective tape is applied to the back of the display module to cover and protect the flexible circuit board and part or all of the bonding area.

[0003] As the requirements for narrow bezels on the bottom of display panels become increasingly stringent, low-pressure injection molding (Lipo process) has become one of the mainstream technologies for encapsulating the bottom bezel of display modules. The Lipo process requires protective tape to be sealed and bonded to the display panel between the bottom bezel; otherwise, there will be insufficient airtightness, which will affect the operation of the display module.

[0004] Currently, the protective tape is prone to wrinkling between the driver chip and the bottom frame. This causes air bubbles to appear at the wrinkled areas after the Lipo process is applied, resulting in insufficient airtightness. Utility Model Content

[0005] This application provides a pressing device. It solves the problem of wrinkles in the protective tape on the driver chip side in the prior art. The technical solution is as follows:

[0006] On the one hand, a pressing device is provided, including: a support platform and a pressing assembly;

[0007] The support platform has a support surface for supporting a display module. The display module includes a display panel, a driver chip and a flexible circuit board electrically connected to a bonding area of ​​the display panel. The front side of the display panel contacts the support surface, the bonding area of ​​the display panel can be bent to the back side of the display panel, and the flexible circuit board has at least one electronic component on the side facing away from the display panel.

[0008] The pressing assembly is disposed opposite to the support platform. The pressing assembly includes: a base, and a pressing head fixed on the base facing the support platform. The side of the pressing head away from the base is a pressing surface. The pressing surface is provided with: a first clearance groove and at least one second clearance groove separately disposed, and a first vent groove communicating with the second clearance groove. The first clearance groove is used to avoid the driving chip, the at least one second clearance groove corresponds to the at least one electronic component, the second clearance groove is used to avoid the corresponding electronic component, and the first vent groove is used to communicate with the external environment.

[0009] The pressing head is used to press the protective tape onto the side of the flexible circuit board away from the display panel, and the protective tape covers the driving chip and the at least one electronic component.

[0010] By incorporating a first venting groove in the pressing head that communicates with the second clearance groove, air between the protective tape and the electronic components can be expelled through the first venting groove. This prevents air from flowing towards the driver chip side of the bonding area, and prevents wrinkles from appearing on the side of the driver chip facing the display panel's bending area. Consequently, during the LiPo process, the airtightness of the display module is not compromised due to wrinkles.

[0011] In some possible implementations, the first clearance groove and the at least one second clearance groove are arranged in a first direction, in which the first vent groove is at least distributed on the side of the second clearance groove opposite to the first clearance groove.

[0012] By setting a first vent groove on the side of the second clearance groove opposite to the first clearance groove, air between the protective tape and the electronic components will be discharged along the side of the second clearance groove opposite to the first clearance groove. In this way, even if wrinkles occur, the wrinkles will form at the location of the first vent groove. Furthermore, for protective tapes with softer materials, the yield of subsequent LiPO processes can be ensured by shifting the position of the wrinkles.

[0013] In some possible implementations, the second clearance groove has multiple corner regions, and in the same second clearance groove, one second clearance groove is connected to at least two first exhaust grooves through at least two of the corner regions respectively.

[0014] By setting the first vent groove on the outer side of the corner area of ​​the second clearance groove, the protective tape can be better adhered to the outside of the electronic device through the second clearance groove. Even if wrinkles occur, the wrinkles are located on the outer side of the corner area, and the wrinkles are restricted by the first vent groove, so the wrinkles will stick together, with less internal air residue, reducing the problems of loose adhesion and bulging.

[0015] In some possible implementations, the plurality of corner regions in the same first clearance groove include: two first corner regions and two second corner regions; in the first direction, the two first corner regions are located on the side of the second clearance groove facing the first clearance groove, and the two second corner regions are located on the side of the second clearance groove away from the first clearance groove;

[0016] One of the second clearance slots is connected to three of the first exhaust slots. For the three first exhaust slots connected to the same second clearance slot, two of the first exhaust slots are connected through the two second corner regions of the second clearance slot, and the other first exhaust slot is connected to the second clearance slot through a first corner region.

[0017] By incorporating three first venting slots within a second clearance slot, matching the conventional rectangular clearance slot shape, the protective tape can adhere better to the outer surface of the electronic components, and air between the protective tape and the electronic components can be quickly expelled. Furthermore, with a greater number of first venting slots on the side of the second clearance slot opposite to the first clearance slot, air between the protective tape and the electronic components is preferentially expelled through these first venting slots, preventing air from flowing towards the first clearance slot side.

[0018] In some possible implementations, there are two second clearance slots, which are arranged along a second direction that intersects with the first direction.

[0019] For any one of the second clearance slots, and the first exhaust slot that communicates with the second clearance slot through the first corner region, the first exhaust slot is located on the side opposite to the other second clearance slot in the second direction.

[0020] By not providing a first venting groove between the two second clearance grooves, air between the protective tape and the two electronic components will not flow between the two electronic components and will be prevented from flowing into the first clearance groove. Furthermore, this allows for the rapid removal of air between the protective tape and the electronic components without causing wrinkles to form on the side of the driver chip facing the bending area.

[0021] In some possible implementations, for the first exhaust channel that communicates with the second clearance channel through the first corner region, the first exhaust channel is separately disposed from the first clearance channel.

[0022] By separating the first exhaust channel from the first clearance channel, it can be ensured that the air discharged from the first exhaust channel will not flow into the first clearance channel, thus preventing wrinkles from forming on the side of the drive chip facing the bending area.

[0023] In some possible implementations, the first clearance groove and the at least one second clearance groove are arranged in a first direction; the side of the pressing head away from the base also has a clearance portion, which is located on the side of the first clearance groove away from the second clearance groove in the first direction;

[0024] The shape of the avoidance part matches the shape of the portion of the protective adhesive layer in the display panel that extends to the bonding area to protect the bending area.

[0025] By providing a clearance part on the side of the first clearance groove away from the second clearance groove, the ramp portion extending from the protective adhesive layer to the bonding area can be contour-guided to avoid the problem. In this way, the clearance part can press the protective tape onto the corresponding ramp, and can expel the air in the area enclosed by the protective tape, the driver chip, the protective adhesive layer and the bonding area, thus avoiding the problem of the protective tape being loosely attached or bulging due to the air in this area.

[0026] In some possible implementations, a portion of the pressing surface is located in a second direction between the first clearance groove and the clearance portion.

[0027] By providing a pressing surface between the first clearance groove and the clearance portion, the pressing surface at this location can press the protective tape to the part of the bonding area located between the driver chip and the protective adhesive layer, thereby expelling the air in the area enclosed by the protective tape, driver chip, protective adhesive layer and bonding area, and ensuring that the protective tape adheres to the bonding area.

[0028] In some possible implementations, the pressing head has a venting structure communicating with the first clearance groove, the venting structure being used to communicate with the external environment;

[0029] The first clearance groove extends along a second direction, and the exhaust structure is distributed in the second direction on at least one side of the first clearance groove.

[0030] By setting up an exhaust structure that connects to the first clearance groove, the air between the protective tape and the driver chip can be discharged along the exhaust structure, avoiding problems such as incomplete adhesion, bulging, or wrinkles caused by the air between the protective tape and the driver chip.

[0031] In some possible implementations, the exhaust structure is a second exhaust groove, which is distributed on the pressing surface;

[0032] Wherein, the depth of the second vent groove relative to the pressing surface is less than or equal to the depth of the first clearance groove relative to the pressing surface.

[0033] By providing a second relief groove that communicates with the first relief groove on the bonding surface, during the process of venting air between the protective tape and the driver chip, even if wrinkles form on the outer periphery of the driver chip, they will be formed at the position corresponding to the second relief groove, that is, on both sides of the first relief groove in the second direction, rather than on the side of the first relief groove facing the bending area, thus not affecting the subsequent LiPO process.

[0034] In some possible implementations, the exhaust structure is an exhaust port that extends along the sidewall of the first clearance groove to the external environment.

[0035] By using vent holes, vent holes can be opened on the side wall of the first clearance groove, instead of opening vent grooves on the pressing surface. This ensures that the pressing head has a sufficient pressing area for the protective tape and can effectively expel air between the protective tape and the driver chip.

[0036] In some possible implementations, the pressing head has a plurality of adsorption holes, at least a portion of which have openings distributed on the pressing surface;

[0037] The base has an adsorption channel inside, and the plurality of adsorption holes are connected to the adsorption channel.

[0038] By setting multiple adsorption holes on the pressing surface, the protective tape can be adsorbed onto the pressing head through the adsorption channel of the base using vacuum negative pressure. Then, the pressing head presses the protective tape onto the back of the display panel. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of a display module before protective tape is applied.

[0041] Figure 2 This is a schematic diagram of a display module after protective tape has been applied.

[0042] Figure 3 This is a schematic diagram of the structure of a pressing component;

[0043] Figure 4 This is a schematic diagram of the pressing device provided in the embodiments of this application;

[0044] Figure 5 This is a schematic diagram of the structure of the pressing assembly provided in the embodiments of this application;

[0045] Figure 6 A schematic diagram of the corner region of the second clearance groove provided in an embodiment of this application;

[0046] Figure 7 A schematic diagram of a display module after protective tape has been applied.

[0047] Figure 8 This is a schematic diagram of the structure of a pressing assembly provided in another embodiment of this application;

[0048] Figure 9 for Figure 8 The cross-sectional view of the pressing assembly at A-A' is shown in the figure;

[0049] Figure 10 This is a schematic diagram of the structure of the display module after applying protective tape according to an embodiment of this application;

[0050] Figure 11 This is a schematic diagram of the structure of the first clearance groove and clearance part provided in the embodiments of this application;

[0051] Figure 12 This is a schematic diagram of the structure of a pressing assembly provided in another embodiment of this application;

[0052] Figure 13 A schematic diagram of an exhaust structure provided in an embodiment of this application;

[0053] Figure 14 This is another schematic diagram of the exhaust structure provided in the embodiments of this application. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0055] In related technologies, the Lipo process has become the mainstream technology for achieving a narrow bottom bezel. The aforementioned wrinkles can lead to insufficient sealing after potting, which is detrimental to the stable operation of the display module. In display modules manufactured using the Lipo process, the packaging method is COP (Chip on Panel), which means that the driver chip is bonded to the bonding area of ​​the display panel. By bending the bending area of ​​the panel, the bonding area and the driver chip are bent to the back of the display panel.

[0056] Please refer to Figure 1 , Figure 1 This is a schematic diagram of a display module before the protective tape is applied. The protective tape (IC Cover Tape, or Tape for short) application process involves attaching the protective tape to the back of the display panel 1 to shield and protect the flexible printed circuit board 3 (FPC) 3, the electronic components 31 on the FPC, and the driver chip 21 on the bonding area 2 on the back of the display panel 1.

[0057] Please refer to Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of a display module after protective tape has been applied. Figure 3This is a schematic diagram of a pressing assembly. The pressing assembly 4 may include a pressing head 5 and a base 6. The side of the pressing head 5 facing away from the base 6 has a first clearance groove 51 and a second clearance groove 52 corresponding to the driving chip 21 and the electronic component 31. In related technologies, such as... Figure 3 As shown, both the first clearance groove 51 and the second clearance groove 52 are enclosed grooves on all sides. This makes it difficult for air to escape between the protective tape 0 and the electronic component 31 after the protective tape 0 covers and attaches to them. Figure 2 As shown, since the protective tape 0 has a larger area on the side of the electronic component 31 away from the driver chip 21, the air between the protective tape 0 and the electronic component 31 will be discharged towards the driver chip 21. Finally, the protective tape 0 forms wrinkles A on both sides of the bending area (generally the lower bezel direction) of the driver chip 21 towards the display panel 1.

[0058] Furthermore, in order to achieve LiPo process on the bezel and reduce the product cost of the protective tape, some protective tapes omit the absorbing material and graphite placed above the driver chip. After this removal, the protective tape itself becomes very soft and loses its stiffness, making the aforementioned wrinkling problem more likely to occur.

[0059] In this embodiment of the application, by providing a first venting groove in the pressing head that communicates with the second clearance groove, the air between the protective tape and the electronic components can be discharged through the first venting groove, so that the airtightness of the display module will not be affected by wrinkles during the Lipo process.

[0060] This application provides a pressing device; please refer to... Figure 4 and Figure 5 , Figure 4 This is a schematic diagram of the pressing device provided in the embodiments of this application. Figure 5 This is a schematic diagram of the structure of the pressing component provided in the embodiment of this application. The pressing device 000 includes: a support platform 100 and a pressing component 200.

[0061] The support platform 100 has a support surface for supporting the display module 300. The display module 300 may include: a display panel 310, and a driver chip 311 and a flexible circuit board 320 electrically connected to the bonding area 310c of the display panel 310. The front side of the display panel 310 is in contact with the support surface, and the bonding area 310c of the display panel 310 can be bent to the back side of the display panel 310. The flexible circuit board 320 has at least one electronic component 321 on the side away from the display panel 310.

[0062] The pressing assembly 200 is disposed opposite to the support platform 100. The pressing assembly 200 may include: a base 210 and a pressing head 220 fixed on the side of the base 210 facing the support platform 100; the side of the pressing head 220 away from the base 210 is a pressing surface 220a, and the pressing surface 220a is provided with: a first clearance groove 221 and at least one second clearance groove 222 separately disposed, and a first exhaust groove 223 communicating with the second clearance groove 222; the first clearance groove 221 is used to avoid the driving chip 311, at least one second clearance groove 222 corresponds to at least one electronic component 321, the second clearance groove 222 is used to avoid the corresponding electronic component 321, and the first exhaust groove 223 is used to communicate with the external environment.

[0063] The pressing head 220 is used to press the protective tape 400 onto the side of the flexible circuit board 320 away from the display panel 310, and the protective tape 400 covers the driver chip 311 and at least one electronic component 321.

[0064] In this embodiment, by providing a first venting groove communicating with the second clearance groove in the pressing head, air between the protective tape and the electronic components can be discharged through the first venting groove. This prevents air from flowing towards the driver chip side of the bonding area, and prevents wrinkles from appearing on the side of the driver chip facing the display panel's bending area. Furthermore, during the LiPo process, the airtightness of the display module will not be affected by wrinkles.

[0065] Furthermore, the separately configured first clearance groove 221 and second clearance groove 222 prevent airflow between the protective tape 400 and the electronic component 321 from being shared with the airflow between the protective tape 400 and the driver chip 311. This prevents air from accumulating on the driver chip 311 side during the expulsion of air from between the protective tape 400 and the electronic component 321. Consequently, less air is present between the protective tape 400 and the driver chip 311, reducing the degree of wrinkling caused by airflow between them.

[0066] It should be noted that, for ease of description, in Figure 5The diagram illustrates different filling methods for surfaces in the pressing head 220 that have different vertical distances from the base 210, such as the pressing surface 220a, the groove surface of the bottom of the first clearance groove 221, the groove surface of the bottom of the second clearance groove 222, and the groove surface of the bottom of the first vent groove 223. For example, the height (vertical distance relative to the base 210) between each pressing surface 220a distributed around the outer periphery of the first clearance groove 221 and the second clearance groove 222 can be the same. The groove depths of the three groove surfaces relative to the pressing surface 220a can also be the same: the groove surface of the bottom of the first clearance groove 221, the groove surface of the bottom of the second clearance groove 222, and the groove surface of the bottom of the first vent groove 223. Of course, the above is merely an example and does not constitute a specific limitation on the pressing surface 220a, the first clearance groove 221, the second clearance groove 222, and the first vent groove 223.

[0067] For some possible implementations, please refer to Figure 5 The first clearance groove 221 and at least one second clearance groove 222 are arranged in the first direction X. In the first direction X, the first exhaust groove 223 is at least distributed on the side of the second clearance groove 222 away from the first clearance groove 221.

[0068] For example, such as Figure 5 As shown, the two first exhaust slots 223 are distributed on the side of the second clearance slot 222 opposite to the first clearance slot 221. In this way, the air between the protective tape 400 and the electronic component 321 will be preferentially discharged along the positions of the two first exhaust slots 223.

[0069] In this embodiment, a first venting groove 223 is provided on the side of the second clearance groove 222 opposite to the first clearance groove 221. Air between the protective tape 400 and the electronic component 321 is expelled along this side of the second clearance groove 222. Thus, even if wrinkles form on the protective tape 400, they will be located at the corresponding position of the first venting groove 223. Furthermore, even if wrinkles exist on the protective tape 400 after pressing, they will be located at the corresponding position of the second clearance groove 222, away from the bottom edge. This also ensures high yield in subsequent Lipo processes by repositioning the wrinkles in the more flexible protective tape 400.

[0070] For some possible implementations, please refer to Figure 5 and Figure 6 , Figure 6This is a schematic diagram of the corner region of the second clearance groove provided in the embodiment of this application. The second clearance groove 222 has multiple corner regions 2220. In the same second clearance groove 222, one second clearance groove 222 is connected to at least two first exhaust grooves 223 through at least two corner regions 2220 respectively.

[0071] For example, such as Figure 5 and Figure 6 As shown, the second clearance groove 222 on the left side is rectangular and has four corner regions 2220. It has three first exhaust grooves 223 that are connected to the second clearance groove 222 on the left side.

[0072] In this embodiment, a first venting groove 223 is provided on the outer side of the corner region 2220 of the second clearance groove 222. In this way, the protective tape 400 can be better attached to the outer side of the electronic component 321 through the second clearance groove 222. Even if the protective tape 400 wrinkles, the wrinkles are located on the outer side of the corresponding corner region 2220. The position of the wrinkles is restricted by the first venting groove 223, and the wrinkles will stick together, with less internal air residue, reducing the problems of incomplete adhesion and bulging.

[0073] In some possible implementations, such as Figure 6 As shown, the multiple corner regions 2220 in the same first clearance groove 221 may include: two first corner regions 222a and two second corner regions 222b; in the first direction X, the two first corner regions 222a are located on the side of the second clearance groove 222 facing the first clearance groove 221, and the two second corner regions 222b are located on the side of the second clearance groove 222 away from the first clearance groove 221.

[0074] Among them, one second clearance groove 222 is connected to three first exhaust grooves 223. For the three first exhaust grooves 223 connected to the same second clearance groove 222, two first exhaust grooves 223 are connected to the second clearance grooves 222 through two second corner regions 222b respectively, and the other first exhaust groove 223 is connected to the second clearance groove 222 through a first corner region 222a.

[0075] This embodiment of the application, by providing three first exhaust grooves 223 in a second clearance groove 222, can match the conventional rectangular clearance groove shape, allowing the protective tape 400 to adhere better to the outer surface of the electronic component 321, and facilitating the rapid expulsion of air between the protective tape 400 and the electronic component 321. Furthermore, by providing a greater number of first exhaust grooves 223 on the side of the second clearance groove 222 away from the first clearance groove 221, air between the protective tape 400 and the electronic component 321 is preferentially expelled through these first exhaust grooves 223, preventing air from flowing towards the first clearance groove 221.

[0076] In some possible implementations, such as Figure 5 and Figure 6 As shown, there are two second clearance slots 222, which are arranged along the second direction Y. The second direction Y intersects the first direction X. For example, the second direction Y is perpendicular to the first direction X.

[0077] For any one of the second clearance slots 222, and the first exhaust slot 223 that communicates with the second clearance slot 222 through the first corner region 222a, the first exhaust slot 223 is located on the side opposite to the other second clearance slot 222 in the second direction Y. That is, neither of the two adjacent second corner regions 222b of the two second clearance slots 222 communicates with the first exhaust slot 223.

[0078] In this embodiment, by not providing a first venting groove 223 between the two second clearance grooves 222, air between the protective tape 400 and the two electronic components 321 is prevented from flowing between the two electronic components 321 and is thus avoided from flowing into the first clearance groove 221. Furthermore, while ensuring that no wrinkles form on the side of the driver chip 311 facing the bending area 310b, the air between the protective tape 400 and the electronic components 321 is quickly discharged.

[0079] In some possible implementations, such as Figure 6 As shown, the first exhaust groove 223, which is connected to the second clearance groove 222 through the first corner region 222a, is separately disposed from the first clearance groove 221.

[0080] In this embodiment of the application, by separating the first exhaust groove 223 from the first clearance groove 221, it can be ensured that the air discharged from the first exhaust groove 223 will not flow into the first clearance groove 221, thus preventing wrinkles from forming on the side of the driving chip 311 facing the bending area 310b.

[0081] Please refer to Figure 7 , Figure 7 This is a schematic diagram of a display module after protective tape has been applied. The display panel 310 has a protective adhesive layer 330 coated on the outside of the bending area 310b to protect it. The protective adhesive layer 330 extends between the bending area 310b and the display area 310a. The portion of the protective adhesive layer 330 extending to the bonding area 310c forms a transitional ramp structure 331. For example... Figure 7As shown, after the protective tape 400 is pressed using a pressing device with related technology, because the pressing surfaces of the pressing head 5 are on the same plane, the protective tape 400 cannot adhere to the area B between the driver chip 311 and the ramp structure 331, or to the ramp structure 331. The air in area B, enclosed by the protective tape 400, driver chip 311, protective adhesive layer 330, and bonding area 310c, cannot be expelled, resulting in a loose adhesion and bulging of the protective tape 400 in this area. Furthermore, the air in area B will undergo thermal expansion and contraction over time, causing the portion of the protective tape 400 originally adhered to the display module 300 to bulge as well.

[0082] For some possible implementations, please refer to Figure 8 , Figure 9 as well as Figure 10 As shown, Figure 8 This is a schematic diagram of the structure of a pressing assembly provided in another embodiment of this application. Figure 9 for Figure 8 The cross-sectional view of the pressing assembly at A-A' shown in the figure. Figure 10 This is a schematic diagram of the structure of the display module after the protective tape is applied according to the embodiment of this application. The first clearance groove 221 and at least one second clearance groove 222 are arranged in the first direction X. The side of the pressing head 220 away from the base 210 also has a clearance part 224. In the first direction X, the clearance part 224 is located on the side of the first clearance groove 221 away from the second clearance groove 222.

[0083] The shape of the clearance portion 224 matches the shape of the portion of the protective adhesive layer 330 in the display panel 310 that extends to the bonding area 310c for protecting the bending area 310b.

[0084] In this embodiment, a clearance portion 224 is provided on the side of the first clearance groove 221 opposite to the second clearance groove 222. The clearance portion 224 can be designed to conform to the shape of the portion of the protective adhesive layer 330 extending into the bonding area 310c. The clearance portion 224 has a first conforming surface 224a and a second conforming surface 224b, wherein the first conforming surface 224a matches the inclined surface of the aforementioned climbing structure 331, and the second conforming surface 224b matches the plane of the protective adhesive layer 330. Figure 10 As shown, the protective tape 400 can be attached to the portion of the bonding area 310c in region B, and to the inclined surface of the ramp structure 331, through the contoured clearance portion 224 and the pressing surface 220a distributed between the clearance portion 224 and the first clearance groove 221. This allows air to be expelled from region B, preventing the protective tape 400 from being improperly applied or bulging on the side of the driver chip 311 facing the bending area 310b.

[0085] For some possible implementations, please refer to Figures 8 to 11 , Figure 11 This is a schematic diagram of the structure of the first clearance groove and the clearance portion provided in an embodiment of this application. A portion of the pressing surface 220a is located between the first clearance groove 221 and the clearance portion 224 in the second direction Y. Figure 11 As shown, a portion of the first sub-pressing surface 2201 in the pressing surface 220a is located between the first clearance groove 221 and the clearance portion 224.

[0086] In this embodiment, a pressing surface 220a is provided between the first clearance groove 221 and the clearance portion 224. The pressing surface 220a at this position can press the protective tape 400 to the part of the bonding area 310c located between the driver chip 311 and the protective adhesive layer 330, thereby expelling the air in the area enclosed by the protective tape 400, the driver chip 311, the protective adhesive layer 330 and the bonding area 310c, and ensuring that the protective tape 400 and the bonding area 310c are in contact.

[0087] In some possible implementations, please Figures 11 to 14 , Figure 12 This is a schematic diagram of the structure of a pressing assembly provided in another embodiment of this application. Figure 13 This is a schematic diagram of an exhaust structure provided in an embodiment of this application. Figure 14 This is another schematic diagram of the exhaust structure provided in the embodiment of this application. The pressing head 220 has an exhaust structure 225 that communicates with the first clearance groove 221. The exhaust structure 225 is used to communicate with the external environment.

[0088] The first clearance groove 221 extends along the second direction Y, and the exhaust structure 225 is distributed in the second direction Y at least on one side of the first clearance groove 221.

[0089] For example, the first clearance groove 221 has a first sidewall and a second sidewall disposed opposite to each other in the first direction X, wherein the first sidewall is closer to the second clearance groove 222 than the second sidewall, and the venting structure 225 is closer to the first sidewall than the second sidewall. That is, after the pressing assembly 200 presses the protective tape 400 to the display module 300, the venting structure 225 is away from the bending area 310b and close to the electronic component 321. In this way, even if the protective tape 400 wrinkles at the position corresponding to the venting structure 225, the wrinkles will be formed on the side away from the driver chip 311 and towards the bending area 310b.

[0090] In this embodiment of the application, by setting an exhaust structure 225 that communicates with the first clearance groove 221, the air between the protective tape 400 and the driver chip 311 can be discharged along the exhaust structure 225, avoiding problems such as incomplete adhesion, bulging or wrinkling caused by the air between the protective tape 400 and the driver chip 311.

[0091] In some possible implementations, such as Figure 12 and Figure 13 As shown, the exhaust structure 225 is a second exhaust groove 225a, which is distributed on the pressing surface 220a.

[0092] The depth of the second exhaust groove 225a relative to the pressing surface 220a is less than or equal to the depth of the first clearance groove 221 relative to the pressing surface 220a.

[0093] In this embodiment, by providing a second relief groove 222 communicating with the first relief groove 221 on the pressing surface 220a, during the process of venting air between the protective tape 400 and the driver chip 311, even if wrinkles form on the outer periphery of the driver chip 311, they will be formed at the position corresponding to the second vent groove 225a, that is, on both sides of the first relief groove 221 in the second direction Y, and closer to the first sidewall and farther from the second sidewall, rather than on the side of the first relief groove 221 facing the bending area 310b, thus not affecting the subsequent LiPO process.

[0094] For example, such as Figure 8 and Figure 11 As shown, in the first direction X, at least a portion of the second sub-pressing surface 2202 in the pressing surface 220a is located between the first relief groove 221 and the second relief groove 222. The pressing head 220 has a third vent groove 226 communicating with the first relief groove 221. The third vent groove 226 is closer to the pressing surface 220a than the bottom of the first relief groove 221.

[0095] The second venting groove 225a and the third venting groove 226 can be provided simultaneously, and the depth of the second venting groove 225a relative to the pressing surface 220a is greater than the depth of the third venting groove 226 relative to the pressing surface 220a. For example... Figure 12 and Figure 13 As shown, in the first direction X, the third exhaust groove 226 is further away from the avoidance part 224 than the second exhaust groove 225a. That is to say, the third exhaust groove 226 can be a shallow exhaust groove, which mainly solves the wrinkle problem on the side of the drive chip 311 facing the bending area 310b by shifting the position of the wrinkles, and plays a technical role in assisting exhaust.

[0096] In some possible implementations, such as Figure 14 As shown, the exhaust structure 225 is an exhaust port 225b, which extends through the side wall of the first clearance groove 221 to the external environment.

[0097] For example, the exhaust port 225b and the third exhaust groove 226 can also be provided simultaneously, and the technical effect of the third exhaust groove 226 can be described with reference to the above embodiments.

[0098] In this embodiment, by using an exhaust hole 225b, an exhaust hole 225b can be opened on the side wall of the first clearance groove 221, without the need to open an exhaust groove on the pressing surface 220a. This ensures that the pressing head 220 has a sufficient pressing area on the protective tape 400 and can effectively expel the air between the protective tape 400 and the driver chip 311.

[0099] In some possible implementations, such as Figures 5-6 , Figure 8 , Figures 11-14 As shown, the pressing head 220 has a plurality of adsorption holes 220b, and at least a portion of the adsorption holes 220b have openings distributed on the pressing surface 220a.

[0100] The base 210 has an adsorption channel inside, and multiple adsorption holes 220b are connected to the adsorption channel.

[0101] For example, at least some of the openings of the adsorption holes 220b can also be distributed at the bottom of the first clearance groove 221 and the second clearance groove 222.

[0102] In this embodiment, multiple adsorption holes 220b are provided on the pressing surface 220a. Through the adsorption channel of the base 210, the protective tape 400 can be adsorbed onto the pressing head 220 by vacuum negative pressure. Then, the pressing head 220 presses the protective tape 400 onto the back of the display panel 310.

[0103] In summary, the pressing device provided in this application embodiment can include a support platform and a pressing assembly. By providing a first venting groove communicating with the second clearance groove in the pressing head, air between the protective tape and the electronic components can be discharged through the first venting groove. This prevents air between the protective tape and the electronic components from flowing towards the driver chip side of the bonding area, and prevents wrinkles from appearing on the side of the driver chip facing the bending area of ​​the display panel. Furthermore, during the LiPo process, the airtightness of the display module will not be affected by wrinkles.

[0104] It should be noted that the dimensions of layers and regions may be exaggerated in the accompanying drawings for clarity. Furthermore, it is understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element, or there may be intermediate layers. Additionally, it is understood that when an element or layer is referred to as being "below" another element or layer, it can be directly below the other element, or there may be more than one intermediate layer or element. Furthermore, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it can be the only layer between the two layers or two elements, or there may be more than one intermediate layer or element. Similar reference numerals throughout indicate similar elements.

[0105] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0106] The above description is merely an embodiment of some possible implementations of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A pressing device, characterized in that, include: The support platform (100) and the pressing assembly (200); The support platform (100) has a support surface for supporting a display module (300). The display module (300) includes a display panel (310), a driver chip (311) and a flexible circuit board (320) electrically connected to a bonding area (310c) of the display panel (310). The front side of the display panel (310) contacts the support surface, and the bonding area (310c) of the display panel (310) can be bent to the back side of the display panel (310). The flexible circuit board (320) has at least one electronic component (321) on the side away from the display panel (310). The pressing assembly (200) is disposed opposite to the support platform (100). The pressing assembly (200) includes: a base (210) and a pressing head (220) fixed on the side of the base (210) facing the support platform (100). The side of the pressing head (220) away from the base (210) is a pressing surface (220a). The pressing surface (220a) is provided with: a first clearance groove (221) and at least one second clearance groove (222) separately disposed, and a first exhaust groove (223) communicating with the second clearance groove (222). The first clearance groove (221) is used to avoid the driving chip (311). The at least one second clearance groove (222) corresponds to the at least one electronic component (321). The second clearance groove (222) is used to avoid the corresponding electronic component (321). The first exhaust groove (223) is used to communicate with the external environment. The pressing head (220) is used to press the protective tape (400) onto the side of the flexible circuit board (320) away from the display panel (310), and the protective tape (400) covers the driving chip (311) and the at least one electronic component (321).

2. The pressing device according to claim 1, characterized in that, The first clearance groove (221) and the at least one second clearance groove (222) are arranged in a first direction, and in the first direction, the first exhaust groove (223) is at least distributed on the side of the second clearance groove (222) away from the first clearance groove (221).

3. The pressing device according to claim 2, characterized in that, The second clearance groove (222) has a plurality of corner regions (2220). In the same second clearance groove (222), one second clearance groove (222) is connected to at least two first exhaust grooves (223) through at least two of the corner regions (2220).

4. The pressing device according to claim 3, characterized in that, The plurality of corner regions (2220) in the same first clearance groove (221) include: two first corner regions (222a) and two second corner regions (222b); in the first direction, the two first corner regions (222a) are located on the side of the second clearance groove (222) facing the first clearance groove (221), and the two second corner regions (222b) are located on the side of the second clearance groove (222) away from the first clearance groove (221); One of the second clearance grooves (222) is connected to three of the first exhaust grooves (223). For the three first exhaust grooves (223) connected to the same second clearance groove (222), two of the first exhaust grooves (223) are connected to the second clearance groove (222) through the two second corner regions (222b) respectively, and the other first exhaust groove (223) is connected to the second clearance groove (222) through a first corner region (222a).

5. The pressing device according to claim 4, characterized in that, The number of the second clearance grooves (222) is two, and the two second clearance grooves (222) are arranged along the second direction, which intersects with the first direction; For any one of the second clearance slots (222), and the first exhaust slot (223) that communicates with the second clearance slot (222) through the first corner region (222a), the first exhaust slot (223) is located on the side opposite to the other second clearance slot (222) in the second direction.

6. The pressing device according to claim 4, characterized in that, For the first exhaust groove (223) that communicates with the second clearance groove (222) through the first corner region (222a), the first exhaust groove (223) is separately provided from the first clearance groove (221).

7. The pressing device according to any one of claims 1-6, characterized in that, The first clearance groove (221) and the at least one second clearance groove (222) are arranged in a first direction; the pressing head (220) also has a clearance portion (224) on the side away from the base (210) in the first direction. The clearance portion (224) is located on the side of the first clearance groove (221) away from the second clearance groove (222). The shape of the avoidance part (224) matches the shape of the portion of the protective adhesive layer (330) in the display panel (310) that extends to the bonding area (310c) to protect the bending area (310b).

8. The pressing device according to claim 7, characterized in that, A portion of the pressing surface (220a) is located in the second direction between the first clearance groove (221) and the clearance portion (224).

9. The pressing device according to any one of claims 1-6 and 8, characterized in that, The pressing head (220) has an exhaust structure (225) communicating with the first relief groove (221), and the exhaust structure (225) is used to communicate with the external environment; The first clearance groove (221) extends along a second direction, and the exhaust structure (225) is distributed in the second direction on at least one side of the first clearance groove (221).

10. The pressing device according to claim 9, characterized in that, The exhaust structure (225) is a second exhaust groove (225a), which is distributed on the pressing surface (220a); The depth of the second vent groove (225a) relative to the pressing surface (220a) is less than or equal to the depth of the first clearance groove (221) relative to the pressing surface (220a).

11. The pressing device according to claim 9, characterized in that, The exhaust structure (225) is an exhaust port (225b), which extends through the side wall of the first clearance groove (221) to the external environment.

12. The pressing device according to any one of claims 1-6, 8, and 10-11, characterized in that, The pressing head (220) has a plurality of adsorption holes (220b), and at least a portion of the adsorption holes (220b) have openings distributed on the pressing surface (220a); The base (210) has an adsorption channel inside, and the plurality of adsorption holes (220b) are connected to the adsorption channel.

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