A support plate, a display module, and a method for manufacturing the display module.

Abstract

This application relates to the field of display technology, specifically to a support plate, a display module, and a method for manufacturing the display module. The support plate includes a support plate body, which includes a support surface, and at least a portion of the support plate body is located in a non-bending area. A plurality of hole structures are provided on the support plate body in the non-bending area, and the opening ends of the hole structures are at least located on the support surface. This invention solves the problem of air bubbles appearing when the support plate and the display panel are bonded by providing hole structures.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a support plate, a display module, and a method for manufacturing the display module. Background Technology

[0002] As flexible displays are increasingly used in medium to large-sized projects, including tablets, laptops, and automotive applications, metal support plates are added to support the screen and reduce display issues such as film imprinting and orange peel. However, as the size increases, the thickness of the metal support plate also increases. With increased thickness, problems such as air bubbles can easily occur when the support plate is bonded to the display panel or support film, leading to localized display abnormalities.

[0003] Therefore, there is an air bubble problem between the support plate and the display panel or support film in existing flexible display devices, which needs to be solved. Summary of the Invention

[0004] In view of this, the main technical problem to be solved by this application is the occurrence of air bubbles when the support plate and the support film are attached. This application provides a support plate, a display module and a method for manufacturing the display module, so as to alleviate the problem of air bubbles between the support plate and the display panel or support film in existing flexible display devices.

[0005] To solve the above-mentioned technical problems, one technical solution adopted in this application is: to provide a support plate, the support plate including a support plate body, the support plate body including a support surface, the support plate body being at least partially located in the non-bending area; a plurality of hole structures are provided on the support plate body in the non-bending area, the opening ends of the hole structures being located on the support surface.

[0006] The support plate body also includes a surface, which is set opposite to the support surface; and the cross-sectional area of ​​the hole structure decreases in the direction from the support surface to the surface.

[0007] The hole structure includes spiral holes.

[0008] The hole structure includes through holes or blind holes.

[0009] The support plate also includes a channel located between the two hole structures, which is used to connect the two hole structures.

[0010] The support plate body includes a side wall that surrounds the periphery of the support surface; an inclined surface is provided at one end of the side wall near the support surface, and the inclined surface is used to provide a blocking part so that the blocking part protrudes from the support surface.

[0011] The sidewall is provided with spaced grooves and protrusions, and the length direction of the grooves is parallel to the support surface or the included angle is acute.

[0012] The main body of the support plate is located in the non-bending area and the other part is located in the bending area. The main body of the support plate located in the bending area is provided with a second groove.

[0013] To solve the above-mentioned technical problems, the second technical solution adopted by the present invention is: to provide a display module, including a display panel and the above-mentioned support plate, wherein the support surface of the support plate is close to the back side of the display panel;

[0014] The display module also includes a support film, which is located between the support plate and the display panel.

[0015] To solve the above-mentioned technical problems, the third technical solution adopted by the present invention is: to provide a method for manufacturing a display module, comprising:

[0016] The aforementioned support plate is used;

[0017] A blocking part is made on the periphery of the support plate, and the blocking part protrudes from the support surface of the support plate.

[0018] Apply adhesive to the support surface;

[0019] The back of the display panel is attached to the support surface;

[0020] Remove the obstructions to form a display module.

[0021] The beneficial effects of this application are as follows: Unlike existing technologies, the support plate of this application has several hole structures in the non-bending area of ​​the support plate body, and blocking parts are made on the periphery of the support plate. When the back of the display panel is attached to the support surface, the air bubbles generated are squeezed into the hole structures. The blocking parts prevent part of the adhesive from flowing out, guide more adhesive into the hole structures, and squeeze the air bubbles into the hole structures as well. This improves the air bubble problem when the display panel is attached to the support surface. Attached Figure Description

[0022] Figure 1 This is a cross-sectional structural schematic diagram of an embodiment of the support plate of this application;

[0023] Figure 2 This is a top view of one embodiment of the support plate of this application;

[0024] Figure 3 This is a partially enlarged structural diagram of the first embodiment at the location of the hole structure in the support plate of this application;

[0025] Figure 4 This is a partially enlarged structural diagram of the second embodiment at the location of the hole structure in the support plate of this application;

[0026] Figure 5 This is a partially enlarged structural diagram of the third embodiment at the location of the hole structure in the support plate of this application;

[0027] Figure 6 This is a partially enlarged structural diagram of the fourth embodiment at the location of the hole structure in the support plate of this application;

[0028] Figure 7 This is a partial structural diagram of an embodiment of the support plate of this application;

[0029] Figure 8 This is a top view of another embodiment of the support plate of this application;

[0030] Figure 9 This is a cross-sectional structural diagram along the channel extension direction of one embodiment of the support plate of this application;

[0031] Figure 10 This is a cross-sectional structural diagram of the channel extension direction of another embodiment of the support plate of this application;

[0032] Figure 11 This is a partially enlarged schematic diagram of an embodiment of the support plate in the bending area of ​​this application;

[0033] Figure 12 This is a schematic diagram of the sidewall structure of one embodiment of the support plate of this application;

[0034] Figure 13 This is a partial structural diagram of another embodiment of the support plate of this application;

[0035] Figure 14 This is a schematic diagram of the structure of an embodiment of the display module shown in this application;

[0036] Figure 15 This is a flowchart illustrating a method for manufacturing an embodiment of the display module of this application. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] like Figure 1-2 As shown, the support plate 10 provided in this embodiment includes a support plate body 100, the support plate body 100 includes a support surface 300, and the support plate body 100 is at least partially located in the non-bending area 102 (see...). Figure 8 A number of hole structures 201 are provided on the non-bending area 102 of the support plate body 100, and the opening end (not shown in the figure) of the hole structure 201 is located at least on the support surface 300.

[0039] Specifically, this embodiment of the invention provides a support plate 10. The support plate 10 has a hole structure 201 in its non-bending area 102. When the support plate 10 is attached to the back of a display panel 302 to support the display panel 302, the hole structure 201 serves as a gas storage or venting point. Gas located between the support surface 300 and the back of the display panel 302 is vented to the hole structure 201, alleviating the problem of air bubbles when the back of the display panel 302 and the support plate 10 are attached. This at least reduces the number of air bubbles between the support plate 10 and the display panel 302 in the non-bending area 102, ensuring that there are no air bubbles between the support surface 300 and the back of the display panel 302. This reduces the possibility of localized display abnormalities in the display panel 302 caused by the presence of air bubbles between the display panel 302 and the support surface 300, thereby improving the display effect of the display device. Furthermore, the absence of air bubbles or a small amount of air bubbles between the display panel 302 and the support surface 300 improves the adhesion between them and enhances the production quality of the display device. Furthermore, it can also be applied to the support film 303 attached to the back of the display panel 302 (see... Figure 14 In the case where the support plate 10 is used to attach to the support film 303 on the back of the display panel 302, the presence of air bubbles between the support plate 10 and the support film 303 can be improved, and at least the air bubbles between the support plate 10 and the support film 303 in the non-bending area 102 can be reduced.

[0040] In one embodiment of this application, the support plate body 100 may also be partially located in the bending area 101 (see...). Figure 8 Hole structures 201 can also be provided on the support plate body 100 located in the bending area 101. That is, hole structures 201 are provided in both the bending area 101 and the non-bending area 102 of the support plate body 100, which can reduce air bubbles between the support plate 10 in the non-bending area 102 and the bending area 101 and the display panel 302, and improve the situation where the presence of air bubbles between the display panel 302 and the support surface 300 causes local display abnormalities in the display panel 302. In other embodiments, the support plate body 100 in the bending area 101 may not have hole structures 201.

[0041] In one embodiment, the support plate body 100 further includes a support plate surface 301 (bottom surface), which is disposed opposite to the support surface 300; wherein, in the direction from the support surface 300 to the support plate surface 301, the cross-sectional area of ​​the hole structure 201 decreases. Specifically, in the embodiments of this application, in the direction from the support surface 300 to the support plate surface 301, the cross-sectional area of ​​the hole structure 201 gradually decreases. Figure 3 and Figure 4As shown, in one embodiment of this application, the hole structure 201 can also be a through hole. During the attachment process of the support plate 10 and the display panel 302, after air bubbles are squeezed into the hole structure 201, they can be discharged through the through hole, thereby reducing the number of air bubbles. In other embodiments, such as Figure 5 As shown, the hole structure 201 can also be a blind hole. During the attachment process of the support plate 10 and the display panel 302, the air bubbles are squeezed into the blind hole, which can also reduce the air bubbles on the surface between the support surface 300 and the display panel 302, thereby improving the impact of air bubbles on the display of the display panel 302.

[0042] In one embodiment of this application, as Figure 3 As shown, the hole structure 201 includes a spiral hole, meaning the inner surface of the hole structure 201 has a textured, spiral shape. In one embodiment of this application, when the support plate 10 is used to attach to the display panel 302, an adhesive is provided between the support plate 10 and the display panel 302. Specifically, in this embodiment, the adhesive is a liquid adhesive, such as liquid optical retardant (OCR). This embodiment does not limit the type of liquid adhesive. Specifically, in this embodiment, the hole structure 201 is configured as a spiral hole. Because the spiral texture of the hole structure 201 obstructs the adhesive as it descends into the hole structure 201, the spiral texture has a restraining effect on the adhesive, thereby further slowing down the descent speed of the adhesive, reducing the speed at which the adhesive enters the hole structure 201, preventing the adhesive from rapidly collapsing into the hole structure 201, and reducing the amount of air bubbles generated in the hole structure 201. This ensures a reduction in the amount of air bubbles between the support surface 300 and the display panel 302. In other embodiments, see [reference needed]. Figure 4 and Figure 6 Hole structure 201 can also be a through hole or a blind hole with a smooth inner wall surface, or refer to [reference needed]. Figure 5 Hole structure 201 can also be a blind hole with texture on the inner wall.

[0043] In one embodiment of this application, as Figure 8 and Figure 9As shown, the support plate body 100 also includes a channel 400 located between two hole structures 201 for connecting the two hole structures 201. The channel 400 includes a connecting groove. The length direction of one connecting groove forms an acute angle with the X-axis, and the length direction of the other connecting groove forms an acute angle with the Y-axis. The two connecting grooves are intersected to allow the adhesive to flow between the hole structures 201. During the attachment process between the support plate 10 and the display panel 302, the channel 400 allows excess adhesive in the hole structure 201 to flow into the hole structure 201 with less adhesive, achieving a balance of adhesive. Furthermore, air bubbles in the adhesive can move along with the channel, being evenly squeezed into the hole structure 201 and expelled at the edge of the support plate 10, thereby increasing the degassing and defoaming performance. In other embodiments, the length direction of one connecting groove can also be perpendicular to the X-axis, and the length direction of the other connecting groove can be parallel to the X-axis, also allowing the adhesive to flow between the hole structures 201. In this embodiment, the channel 400 includes a connecting groove, the opening of which is located on the support surface 300, which can further reduce air bubbles between the support plate 10 and the display panel 302. In other embodiments, such as Figure 10 As shown, the channel 400 can also be embedded entirely in the support plate body 100, which can also achieve the effect of the connecting hole structure 201.

[0044] In the embodiments of this application, such as Figure 8 and Figure 9 As shown, the channel 400 is disposed on the support plate body 100 of the non-bending area 102. In other embodiments, the channel 400 may also be disposed on the support plate body 100 of both the non-bending area 102 and the bending area 101.

[0045] In the embodiments of the application, see [reference]. Figure 7-8The support plate body 100 includes a side wall 501. An inclined surface 502 is provided at one end of the side wall 501 near the support surface 300. The inclined surface 502 is used to provide a blocking portion 500, which protrudes from the surface of the support surface 300. In this embodiment, the blocking portion 500 can block adhesive overflow during the bonding process between the support plate 10 and the display panel 302, reducing the amount of adhesive overflow. Any adhesive that does not overflow can remain between the display panel 302 and the support plate 10 during the bonding process. Sufficient adhesive can fill the hole structure 201 as much as possible. Filling the hole structure 201 with adhesive can occupy the space of air bubbles, thereby reducing the storage space for air bubbles in the hole structure 201. Due to the reduced storage space, air bubbles will overflow from around the bonding area between the support plate 10 and the display panel 302, achieving the effect of squeezing out air bubbles and better removing air bubbles during the bonding process between the display panel 302 and the support plate 10. In this embodiment, by providing an inclined surface 502 on the side wall 501, it is convenient to provide a blocking part 500 on the inclined surface 502, and the blocking part 500 will not affect the attachment of the support plate 10 and the display panel 302. Simultaneously, in this embodiment, by providing an inclined surface 502 on the side wall 501, after the display panel 302 is attached to the support plate 10, the blocking part 500 will not be difficult to remove due to the obstruction of the display panel 302, thus making it easier to remove the blocking part 500 after the support plate 10 and the display panel 302 are attached. An inclined surface 502 is provided at the end of the side wall 501 near the support surface 300. The angle of inclination of the upper surface of the inclined surface 502 relative to the support surface 300 is an acute angle. This acute angle results in a smaller slope of the inclined surface 502, thus slowing down the downward flow of overflowing adhesive and making it easier to control the adhesive so that it does not slide down to the surface 301 (bottom surface) of the support plate body 100. In other embodiments, the angle of inclination of the upper surface of the inclined surface 502 relative to the supporting surface 300 can also be an obtuse angle. An obtuse angle results in a steeper slope of the inclined surface 502, causing the overflowing adhesive to slide down faster and allowing excess adhesive to be discharged more quickly. The larger the angle of inclination of the inclined surface 502 relative to the supporting surface 300, the faster the adhesive slides down the inclined surface 502, resulting in less adhesive remaining on the supporting surface 300 in a short time. In other embodiments, the angle is a right angle. A right-angled inclined surface 502 can increase the distance the adhesive travels, slowing down the flow when it reaches the sidewall 501, thus reducing the amount of adhesive flowing onto the surface of the supporting plate body 100. See also... Figure 13 In other inclined surfaces 502, the blocking part 500 may not be provided. Instead, the blocking part 500 is provided on the support surface 300, which can save material for the support plate 10 and reduce costs. In this embodiment, the material of the blocking part 500 includes hot melt adhesive, but this embodiment does not limit the specific material of the blocking part 500.

[0046] It should be noted that, as Figure 12 The side wall 501 is provided with spaced-apart first grooves (not shown) and protrusions 200. The length direction of the first grooves and protrusions 200 is parallel to the support surface 300 or forms an acute angle with it. The first grooves and protrusions 200 extend along the Y-axis and penetrate through it. The first grooves and protrusions 200 include transverse fractures. The spaced-apart first grooves and protrusions 200 on the inclined surface 502 can slow down the speed at which adhesive overflows from the blocking part 500 slides down. During the process of adhesive sliding down, the first grooves will retain a part of the adhesive, and the protrusions 200 will block a part of the adhesive from sliding down.

[0047] In one embodiment, see Figure 8 and Figure 11 The support plate body 100 has a portion located in the non-bending area 102 and another portion located in the bending area 101. The support plate body 100 located in the bending area 101 is provided with a second groove 202. The second groove 202 in the bending area 101 includes a strip-shaped hole. In this embodiment, the length direction of the second groove 202 is at least partially the same as the length direction of the bending line of the bending area 101. During the bonding process between the support plate 10 and the display panel 302, adhesive is used to fill the second groove 202 in the bending area 101, which can improve the bending stress when the bending area 101 is bent.

[0048] This application also includes a second technical solution, see below. Figure 14 A display module includes a display panel 302 and the aforementioned support plate 10, wherein the support surface 300 of the support plate 10 is close to the back side of the display panel 302.

[0049] In this embodiment, by providing a plurality of hole structures 201 on the main body 100 of the support plate in the non-bending area 102 of the support plate 10, when the support surface 300 of the support plate 10 is attached to the display panel 302, air bubbles are squeezed into the hole structures 201, thereby improving the air bubble problem on the support surface 300 and the back of the display panel 302, reducing the air bubbles generated when the support plate 10 and the display panel 302 are attached, thus reducing the generation of air bubbles between the support plate 10 and the display panel 302, thereby increasing the fit, reducing the impact of air bubbles on the display of the display module, and making the display of the display module clearer.

[0050] In this embodiment, the display module further includes a support film 303, which is located between the support plate 10 and the display panel 302. In this embodiment, the support plate 10 has at least a plurality of hole structures 201 in the support plate body 100 of the non-bending area 102. This can improve the problem of air bubbles generated when the support surface 300 and the support film 303 are bonded together, reduce air bubbles between the support plate 10 and the support film 303 when the display panel 302 is bonded to the support plate 10, reduce the impact of air bubbles on the display of the display module, and make the display of the display module clearer and more accurate.

[0051] This application also includes a third technical solution, a method for manufacturing a display module, comprising:

[0052] S11, providing the aforementioned support plate 10.

[0053] like Figure 1-2 As shown, the support plate 10 provided in this embodiment includes a support plate body 100, the support plate body 100 includes a support surface 300, and the support plate body 100 is at least partially located in the non-bending area 102; a plurality of hole structures 201 are provided on the non-bending area 102 of the support plate body 100, and the opening end of the hole structure 201 is at least located on the support surface 300.

[0054] Specifically, this embodiment of the invention provides a support plate 10. The support plate 10 has a hole structure 201 in the non-bending area 102. When the back of the display panel 302 is attached to the support surface 300, the hole structure 201 serves as a gas storage or venting point, venting gas located between the support surface 300 and the back of the display panel 302 to the hole structure 201. This alleviates the problem of air bubbles existing when the display panel 302 and the support plate 10 are attached, ensuring no air bubbles between the support surface 300 and the display panel 302. This reduces the occurrence of localized display abnormalities in the display panel 302 due to the presence of air bubbles. It can improve the adhesion between the display panel 302 and the support surface 300, thus improving the quality of the display screen. Furthermore, it can also be applied when a support film 303 is attached to the back of the display panel 302. When the support film 303 on the back of the display panel 302 is attached to the support plate 10, it can reduce air bubbles between the display panel 302 and the support film 303.

[0055] In one embodiment, the support plate body 100 further includes a support plate surface 301 (bottom surface), which is disposed opposite to the support surface 300; wherein, in the direction from the support surface 300 to the support plate surface 301, the cross-sectional area of ​​the hole structure 201 decreases. The support plate surface 301 is the bottom surface of the support plate body 100. The hole structure 201 includes through holes or blind holes. In one embodiment, when the hole structure 201 is a through hole, during the attachment process between the support plate 10 and the display panel 302, air bubbles squeezed into the hole structure 201 can be discharged through the through hole, thereby reducing air bubbles. In other embodiments, when the hole structure 201 is a blind hole, during the attachment process between the support plate 10 and the display panel 302, air bubbles are squeezed into the blind hole, reducing air bubbles on the surface between the support surface 300 and the display panel 302, thus ensuring that air bubbles do not affect the normal display of the display panel 302.

[0056] In one embodiment of this application, as Figure 3 As shown, the hole structure 201 includes a spiral hole. Due to the obstruction of the spiral texture of the hole structure 201, when the adhesive enters the hole structure 201, the spiral texture hinders the adhesive during its descent, further slowing down the descent speed. This prevents the adhesive from rapidly collapsing into the hole structure 201. The increased contact area between the adhesive and air due to the collapsing hole structure 201 traps air, creating air bubbles. The adhesive is a liquid adhesive, including liquid optical adhesives (OCR).

[0057] S12, a blocking part 500 is made on the periphery of the support plate 10, and the blocking part 500 protrudes from the support surface 300 of the support plate 10.

[0058] In the embodiments of the application, see [reference]. Figure 7-8 The support plate body 100 includes a side wall 501. An inclined surface 502 is provided at one end of the side wall 501 near the support surface 300. The inclined surface 502 is used to provide a blocking portion 500, causing the blocking portion 500 to protrude from the support surface 300. There are no material restrictions on the blocking portion 500; it just needs to be removable after the display panel 302 and the support plate 10 are attached. The material for the blocking portion 500 includes hot melt adhesive. In other embodiments, the inclined surface 502 may not be provided at the end of the side wall 501 near the support surface 300, and the blocking portion 500 can be provided around the support surface 300.

[0059] S13, apply adhesive to the support surface 300.

[0060] An adhesive is applied to the support surface 300. The adhesive includes liquid adhesives, including liquid optical retardant (OCR).

[0061] S14, attach the back of the display panel 302 to the support surface 300.

[0062] A support film 303 may also be added between the back of the display panel 302 and the support surface 300 (see...). Figure 14 The support plate 10 has several hole structures 201 on the support plate body 100 in the non-bending area 102. When the support surface 300 of the support plate 10 is attached to the support film 303, air bubbles are squeezed into the hole structures 201, which improves the air bubble problem between the support surface 300 and the support film 303. This ensures that the support plate 10 and the support film 303 will not be affected by air bubbles, and the display panel 302 will not cause local display abnormalities due to air bubble problems.

[0063] S15, remove the obstruction 500 to form a display module.

[0064] The support plate 10 of this application has a plurality of hole structures 201 provided on the non-bending area 102 of the support plate body 100, and a blocking part 500 provided on the periphery of the support surface 300. In other embodiments, the blocking part 500 may also be provided on the inclined surface 502. Since the blocking part 500 provided on the inclined surface 502 is on the periphery of the support surface 300, it is not affected by the attachment of the support plate 10 and the display panel 302. When removing the blocking part 500, it will not be difficult to remove due to the obstruction of the display panel 302, thus making it easier to remove the blocking part 500 after the support plate 10 and the display panel 302 are attached.

[0065] The above are merely embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A support plate, characterized in that, The support plate includes: A support plate body, the support plate body including a support surface, the support plate body being at least partially located in the non-bending area; The support plate body in the non-bending area is provided with a plurality of hole structures, and the opening end of the hole structures is located on the support surface; Meanwhile, the main body of the support plate includes a side wall, which surrounds the periphery of the support surface; An inclined surface is provided at one end of the sidewall near the support surface. The inclined surface is used to provide a blocking part so that the blocking part protrudes from the support surface. The sidewall is provided with a first groove and a protrusion arranged at intervals. The length direction of the first groove and the protrusion is parallel to the support surface or forms an acute angle with it.

2. The support plate according to claim 1, characterized in that, The main body of the support plate also includes a surface, which is disposed opposite to the support surface; wherein, in the direction from the support surface to the surface, the cross-sectional area of ​​the hole structure decreases.

3. The support plate according to claim 1, characterized in that, The hole structure includes a spiral hole.

4. The support plate according to claim 1, characterized in that, The hole structure includes through holes or blind holes.

5. The support plate according to claim 1, characterized in that, The support plate body also includes a channel located between the two hole structures for connecting the two hole structures.

6. The support plate according to claim 1, characterized in that, One part of the main body of the support plate is located in the non-bending area, and the other part is located in the bending area. The main body of the support plate located in the bending area is provided with a second groove.

7. A display module, characterized in that, It includes a display panel and a support plate according to any one of claims 1-6, wherein the support surface of the support plate is close to the back side of the display panel.

8. The display module according to claim 7, characterized in that, It also includes a support film located between the support plate and the display panel.

9. A method for manufacturing a display module, characterized in that, include: Provide a support plate as described in any one of claims 1-6; A blocking portion is made on the periphery of the support plate, and the blocking portion protrudes from the support surface of the support plate. An adhesive is applied to the support surface; The back of the display panel is attached to the support surface; Remove the obstruction to form a display module.

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