Curved display screen attaching device and attaching method

Abstract

The present disclosure provides a kind of curved display screen and attaching method of attaching device.This attaching device includes: first fixture and second fixture, first fixture and second fixture respectively include oppositely arranged first surface and second surface;First surface includes recessed part adapted to the curvature of curved display screen, and the recessed part is used to accommodate the cover plate of curved display screen;Second surface is provided with protruding part corresponding to the top corner of curved display screen, and the protruding part is used to apply attaching pressure to the top corner of the cover plate and screen body of curved display screen;When one of first fixture and second fixture moves towards the other, the position of the top corner of cover plate and screen body corresponding to protruding part first contacts, and with the continuous relative movement of first fixture and second fixture, cover plate and screen body sequentially contact from top corner to middle position.The present disclosure is conducive to controlling the attaching sequence and attaching pressure of the curved surface of cover plate, avoiding the generation of attaching bubble at the curved surface of cover plate, improving product yield, and improving cost is low.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a bonding device and bonding method for curved display screens. Background Technology

[0002] With the development of display technology, curved screens are becoming increasingly popular. A curved screen typically consists of a curved cover plate and a screen body that is attached to the curved cover plate. The screen body can be attached to the inside of the curved cover plate.

[0003] During the bonding process between the screen and the curved cover plate, upper and lower fixtures are typically used to apply bonding pressure to both the screen and the curved cover plate, thus bonding the screen to the cover plate. Common bonding processes between the screen and the curved cover plate are prone to air bubbles, affecting the yield rate of curved screen products. Summary of the Invention

[0004] In view of this, the purpose of this disclosure is to provide a bonding device and bonding method for curved display screens, which can avoid residual air bubbles at the top corner of the cover plate and improve product yield.

[0005] To achieve the above objectives, this disclosure provides a bonding device for a curved display screen, comprising: a first fixture and a second fixture, the first fixture and the second fixture respectively comprising a first surface and a second surface disposed opposite to each other; the first surface includes a recessed portion adapted to the curvature of the curved display screen, the recessed portion being used to accommodate a cover plate of the curved display screen; the second surface is provided with a protrusion corresponding to the top corner of the curved display screen, the protrusion being used to apply bonding pressure to the top corner of the cover plate and the screen body of the curved display screen; when one of the first fixture and the second fixture moves toward the other, the top corner of the cover plate and the screen body at the position corresponding to the protrusion first contacts, and as the first fixture and the second fixture continue to move relative to each other, the cover plate and the screen body contact sequentially from the top corner to the middle position.

[0006] In one embodiment, the second fixture includes a base and an elastic support member; the base includes a second surface; the elastic support member covers the second surface and is used to contact the screen body. By flexibly contacting the screen body with the elastic support member, the screen body can be better fitted to the perimeter of the cover plate, improving product yield.

[0007] In one embodiment, the base comprises a rigid material; preferably, the rigid material comprises translucent acrylic. Acrylic has moderate hardness, is easy to process, and is easy to observe.

[0008] In one embodiment, the elastic support is made of silicone; preferably, the elastic support is detachably connected to the second fixture. Silicone is chemically stable and possesses good toughness and elasticity.

[0009] In one embodiment, the elastic support protrudes higher at the location corresponding to the raised portion compared to other locations. This prevents air bubbles from remaining during the bonding process between the cover plate and the screen body.

[0010] In one embodiment, the height of the protrusion is between 0.5 mm and 1 mm. This allows sufficient pressure to be applied to the top corner area while preventing stress concentration on the screen due to excessive height, which could damage the screen.

[0011] Preferably, the orthographic projection of the protrusion on the second fixture includes a straight line, a rectangle, a parallelogram, a circle, or an arc.

[0012] In one embodiment, the material of the protrusion includes a rigid material; preferably, the rigid material includes translucent acrylic.

[0013] In one embodiment, a transition surface is provided between the protrusion on the second surface and other areas; preferably, the transition surface includes a transition slope and a transition arc surface.

[0014] In one embodiment, the inclination of the transition slope is between 15 and 20 degrees. This allows the top corners of the cover plate and the screen to make initial contact with the corresponding positions of the protrusions, preventing air bubbles from forming at the top corners.

[0015] Based on the same inventive concept, this disclosure also provides a bonding method for a curved display screen using the bonding device described above, comprising the following steps:

[0016] Place the cover plate and screen body of the curved display screen between the first fixture and the second fixture;

[0017] At least one of the first fixture and the second fixture is moved relative to each other, such that the top corner of the cover plate and the screen body first contacts the position corresponding to the protrusion;

[0018] Continue moving the first fixture and / or the second fixture so that the cover plate and the screen body make contact sequentially from the top corner to the middle position.

[0019] Compared with the prior art, the bonding device and bonding method for curved display screens provided in this disclosure, by setting a protrusion on the second surface of the second fixture corresponding to the top corner of the curved display screen, allows the top corner of the cover plate and the screen body to contact the position corresponding to the protrusion first during bonding, and then contact the position sequentially from the top corner to the middle position. This is beneficial for controlling the bonding sequence and bonding pressure at the curved surface of the cover plate, avoiding the generation of bonding air bubbles at the top corner, improving product yield, and having low improvement cost. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this disclosure or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are only embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a diagram illustrating the presence of air bubbles at the top corners after the display screen has been laminated.

[0022] Figure 2 A schematic diagram of a bonding device for a curved display screen provided in an embodiment of this disclosure;

[0023] Figure 3 for Figure 2 Side view of the bonding device for the curved display screen shown;

[0024] Figure 4 for Figure 2 A top view of the bonding device for the curved display screen shown;

[0025] Figure 5 A schematic diagram of a protrusion at one corner of the base of a bonding device for a curved display screen provided in an embodiment of this disclosure;

[0026] Figure 6 A schematic diagram of a protrusion at one corner of the base of a bonding device for a curved display screen provided in another embodiment of this disclosure;

[0027] Figure 7 This is a schematic flowchart of a bonding method for a bonding apparatus for a curved display screen provided in an embodiment of the present disclosure. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0029] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this disclosure should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in the embodiments of this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] Please see Figure 1 During long-term practical work, the inventors of this disclosure discovered that air bubbles 301 easily remain in the top corner area during the bonding process between the screen and the curved cover plate. The main reason for the formation of air bubbles 301 is that existing fixtures utilize the deformation characteristics of silicone support components under pressure to complete the bonding between the screen and the curved cover plate through the design of the outer contour. However, the design of silicone support components is quite difficult. For example, if the contact sequence between the screen and the curved cover plate during bonding is from the middle to the edge, it is easy to cause insufficient pressure on the curved surface area at the top corner of the curved cover plate, thus making it easier to generate bonding air bubbles 301 in the top corner area of ​​the curved display screen, resulting in low product yield.

[0031] In view of this, please see Figure 2-6 This disclosure provides a bonding device for a curved display screen, comprising: a first fixture 100 and a second fixture 200, the first fixture 100 and the second fixture 200 respectively comprising a first surface and a second surface disposed opposite to each other; the first surface includes a recess 101 adapted to the curvature of the curved display screen, the recess 101 being used to accommodate a cover plate 102 of the curved display screen; the second surface is provided with a protrusion corresponding to the top corner of the curved display screen, the protrusion being used to apply bonding pressure to the top corner of the cover plate 102 and the screen body 103 of the curved display screen; when one of the first fixture 100 and the second fixture 200 moves toward the other, the top corner of the cover plate 102 and the screen body 103 first contacts the position corresponding to the protrusion, and as the first fixture 100 and the second fixture 200 continue to move relative to each other, the cover plate 102 and the screen body 103 contact each other sequentially from the top corner to the middle position.

[0032] For details, please refer to [link / reference]. Figure 2The cover plate 102 of the curved display screen is detachably housed in the recess 101 of the first fixture 100. A support film 104 is provided between the first fixture 100 and the second fixture 200, and the screen body 103 is supported on the support film 104. The support film 104 is movably disposed between the second fixture 200 and the first fixture 100 via a gripper 107. During bonding, the gripper 107 moves toward the second fixture 200, bonding the support film 104 onto the second fixture 200; the second fixture 200 drives the support film 104 and the screen body 103 to move toward the first fixture 100, bonding them with the cover plate 102 housed on the first fixture 100. Because the second fixture 200 has protrusions on its second surface facing the first fixture 100 that correspond to the top corners of the curved display screen, the top corners of the cover plate 102 and the screen body 103 first contact the positions corresponding to the protrusions. As the second fixture 200 moves further toward the first fixture 100, the screen body 103 and the cover plate 102 contact sequentially from the top corners toward the middle. This ensures the bonding pressure in the curved area at the top corner, thereby preventing the formation of bonding bubbles on the curved surface of the cover plate 102 when the screen body 103 is bonded to the cover plate 102, improving the uniformity of bonding, and thus improving the product yield.

[0033] Optionally, the second fixture 200 can remain stationary, while the first fixture 100, carrying the cover plate 102 housed within the recess 101, moves toward the second fixture 200. This causes the apex corners of the cover plate 102 and the screen 103 to first contact the corresponding positions of the protrusions on the second fixture 200. As the first fixture 100 moves further toward the second fixture 200, the screen 103 and the cover plate 102 sequentially contact each other from the apex corners toward the center. In some cases, the first fixture 100 and the second fixture 200 can move toward each other simultaneously; the movement method of the first fixture 100 and the second fixture 200 can be selected according to requirements and is not specifically limited here.

[0034] Specifically, the second fixture 200 includes a base 201 and an elastic support 203; the base 201 includes a second surface; the elastic support 203 covers the second surface and is used for flexible contact with the screen 103. The elastic support 203 is made of silicone and is detachably connected to the second fixture 200 via a connecting mechanism.

[0035] It is understandable that the position of the protrusion of the elastic support 203 is higher than other positions of the elastic support 203. This setting can avoid the existence of air bubbles at the top corner.

[0036] Please see Figures 2-4The base 201 comprises a rigid material, which may specifically include a light-transmitting rigid material, such as acrylic. Acrylic has good light transmittance, with a transmittance of over 92%, providing soft light and clear vision. Acrylic also has good weather resistance and surface hardness, and good processing performance. The specific material used for the base 201 can be chosen independently and is not specifically limited here. The base 201 of the second fixture 200 includes a second surface, and an elastic support 203 covers the second surface. The elastic support 203 matches the shape of the recess 101 on the first fixture 100. The elastic support 203 has a certain deformation capability. Through the flexible contact between the elastic support 203 and the screen 103, the screen 103 can be better fitted to the perimeter of the cover plate 102, thereby improving product yield.

[0037] For example, the elastic support 203 is made of silicone and is detachably connected to the second fixture 200. Silicone has stable chemical properties and good toughness and elasticity, and is not easily permanently deformed by external forces. A mounting foot (not shown in the figure) is provided on the bottom surface of the elastic support 203 that contacts the base 201, and a mounting groove (not shown in the figure) is provided on the base 201 at the corresponding position of the mounting foot. The elastic support 203 is fixedly installed on the base 201 by the engagement of the mounting foot and the mounting groove. Of course, those skilled in the art will realize that one of the mounting foot and the mounting groove can be flexibly selected to be provided on the elastic support 203, and the other on the base 201. Furthermore, other connection mechanisms can be selected between the elastic support 203 and the base 201, such as adhesion, snap-fit, etc., which are not listed here.

[0038] In the bonding process, existing solutions involve the screen and curved cover plate contacting each other sequentially from the center to the edge. If air bubbles form during this contact, they are squeezed out from the center towards the edge. If the pressure at the edge is insufficient, residual air bubbles may remain. However, in the solution provided in this disclosure, the corners of the cover plate 102 and screen 103, corresponding to the protrusions, contact first. Then, the center of the screen 103 contacts the cover plate 102. On the second surface, between the two corners on the same side, the pressure at the corners is greater than that at the center, causing air bubbles to form. During the bonding process, these air bubbles can be expelled from the side between the corners; this side can be either two short sides or two long sides. This avoids the formation of bonding bubbles at the corners.

[0039] See also Figure 5In one embodiment, the protrusion is formed by attaching a light-transmitting rigid material to the apex region of the second surface, i.e., the material of the protrusion includes a rigid material, specifically a light-transmitting rigid material; the light-transmitting rigid material includes acrylic.

[0040] In one embodiment, the height H1 of the protrusion is between 0.5 mm and 1 mm.

[0041] Preferably, a transition surface is provided between the protrusion on the second surface and its intermediate region. Preferably, the transition surface may include a transition slope and a transition arc surface. The inclination angle α of the transition slope is between 15 degrees and 20 degrees.

[0042] Specifically, by adding a light-transmitting rigid material to the top corner area of ​​the second surface, the base 201 is directly raised, forming an ridge on each side of the base 201. During bonding, due to the raised top corner area, the top corners of the cover plate 102 and the screen 103 can contact the corresponding positions of the protrusions first, while the top corner area provides greater bonding pressure, ensuring that the cover plate 102 and the screen 103 contact sequentially from the top corners to the middle. After adding the light-transmitting rigid material to the top corner area of ​​the second surface, the protrusion will have a certain height, preferably between 0.5 mm and 1 mm. Preferably, the ridge is located on the long side of the base 201, that is, ridges with a height of 0.5 mm to 1 mm are formed on the long sides of both sides of the base 201. The protrusion on the second surface can transition to other areas through a slope, with the inclination α of the transition slope between 15 degrees and 20 degrees. This design ensures that the top corners of the cover plate 102 and the screen body 103 make initial contact with the corresponding protrusions; it also prevents stress concentration on the screen body due to excessive height, which could damage the screen. Of course, the height of the protrusion can be set according to actual needs, and can be 0.1 mm, 0.3 mm, 1.5 mm, 2.0 mm, etc., without specific limitations here. Similarly, the inclination of the transition slope between the protrusion and other areas on the second surface can also be adjusted according to actual needs.

[0043] See also Figure 6 In one embodiment, the protrusion can be formed by cutting and grinding the central region of the second surface. Preferably, the height of the protrusion is between 0.5 mm and 1 mm. A transition arc surface is provided between the protrusion on the second surface and other areas.

[0044] Specifically, the central area of ​​the second surface of the base 201 is cut and polished, indirectly raising the height of the apex region. A curved transition can be achieved between the apex protrusion and other areas, forming a curved fan-shaped groove on the second surface of the base 201. For example, the height H2 of the protrusion is between 0.5 mm and 1 mm, ensuring that the apex of the cover plate 102 and the screen 103 contacts the corresponding position of the protrusion first, guaranteeing that the cover plate 102 and the screen 103 contact sequentially from the apex to the center. This also prevents the screen 103 from being damaged due to stress concentration.

[0045] It is understandable that the orthographic projection of the protrusion on the base 201 of the second fixture 200 includes regular shapes such as straight lines, rectangles, parallelograms, circles, or arcs.

[0046] Based on the same inventive concept, and in conjunction with [see also...] Figure 7 This disclosure also provides a bonding method for the bonding device of the curved display screen as described above, comprising the following steps:

[0047] S1. Place the cover plate and screen body of the curved display screen between the first fixture and the second fixture;

[0048] S2. Move at least one of the first fixture and the second fixture relative to each other, such that the top corner of the cover plate and the screen body first contacts the position corresponding to the protrusion;

[0049] S3. Continue to move the first fixture and / or the second fixture so that the cover plate and the screen body make contact sequentially from the top corner to the middle position.

[0050] See also Figures 2-6 Step S1, placing the cover plate 102 and screen body 103 of the curved display screen between the first fixture 100 and the second fixture 200, specifically includes: placing the first surface of the first fixture 100 opposite to the second surface of the second fixture 200; accommodating the cover plate 102 of the curved display screen in the recess 101 on the first fixture 100; using a gripper 107 to hold the support film 104 and placing it between the first fixture 100 and the second fixture 200; placing the screen body 103 on the support film 104; the base 201 of the second fixture 200 has a protrusion with a height between 0.5 mm and 1 mm; and detachably setting the elastic support member 203 on the protrusion of the base 201, in preparation for attaching the cover plate 102 and the screen body 103 of the curved display screen.

[0051] Step S2 involves moving at least one of the first fixture 100 and the second fixture 200 relative to each other, so that the top corners of the cover plate 102 and the screen body 103 first contact the positions corresponding to the protrusions; Step S3 involves continuing to move the first fixture 100 and / or the second fixture 200, so that the cover plate 102 and the screen body 103 contact sequentially from the top corners to the middle position. Specifically, this includes: moving the first fixture 100 and / or the second fixture 200 as needed, so that the top corners of the cover plate 102 and the screen body 103 first contact the positions corresponding to the protrusions, and continuing to move the first fixture 100 and / or the second fixture 200, so that the cover plate 102 and the screen body 103 contact sequentially from the top corners to the middle position; during the process of bonding the cover plate 102 and the screen body 103, bonding air bubbles will be generated; bonding air bubbles can be discharged between the two top corners located on the same side of the cover plate 102 and the screen body 103, thereby completing the bonding of the cover plate 102 and the screen body 103.

[0052] The aforementioned bonding device and method for curved displays, by setting protrusions corresponding to the top corners of the curved display on the second surface of the second fixture, ensures that the top corners of the cover plate and the screen body first contact the positions corresponding to the protrusions during bonding, and then contact them sequentially from the top corners to the middle positions. This helps to control the bonding sequence and bonding pressure at the curved surface of the cover plate, avoids the generation of bonding air bubbles at the top corners, and improves the product yield.

[0053] Furthermore, the aforementioned bonding device for curved displays can be improved by simply adjusting the base through machining, making the manufacturing process simple; this reduces the design difficulty of the bonding device and saves time and labor costs for the project.

[0054] Although this disclosure has been described in conjunction with specific embodiments thereof, many substitutions, modifications and variations of these embodiments will be apparent to those skilled in the art from the foregoing description.

[0055] This disclosure is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

[0056] It should be noted that the above description describes some embodiments of this disclosure. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in a different order than that shown in the above embodiments and still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0057] This disclosure is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A bonding device for a curved display screen, characterized in that, include: A first fixture and a second fixture, wherein the first fixture and the second fixture respectively include a first surface and a second surface disposed opposite to each other; The first surface includes a recess that is adapted to the curvature of the curved display screen, the recess being used to accommodate a cover plate of the curved display screen; The second surface is provided with a protrusion corresponding to the top corner of the curved display screen. The protrusion is used to apply bonding pressure to the top corner of the cover plate and the screen body of the curved display screen. When one of the first fixture and the second fixture moves toward the other, the top corner of the cover plate and the screen body first contacts the position corresponding to the protrusion. As the first fixture and the second fixture continue to move relative to each other, the cover plate and the screen body contact each other sequentially from the top corner toward the middle position. During the process of the cover plate being attached to the screen body, air bubbles are generated in the area between the two apex corners on the same side, and the air bubbles between the cover plate and the screen body are discharged from the side between the two apex corners; The second fixture includes a base and an elastic support member; the base includes a second surface; the elastic support member covers the second surface and is used to contact the screen body; The material of the protrusion includes a rigid material; A support membrane is provided between the first fixture and the second fixture, and the screen body is supported on the support membrane. The support membrane is movably disposed between the second fixture and the first fixture via grippers.

2. The bonding device for a curved display screen as described in claim 1, characterized in that, The base is made of a rigid material.

3. The bonding device for a curved display screen as described in claim 2, characterized in that, The rigid material includes translucent acrylic.

4. The bonding device for a curved display screen as described in claim 1, characterized in that, The material of the elastic support includes silicone.

5. The bonding device for a curved display screen as described in claim 1, characterized in that, The elastic support is detachably connected to the second fixture.

6. The bonding device for a curved display screen as described in claim 1, characterized in that, The elastic support protrudes at the location corresponding to the protrusion compared to other locations.

7. The bonding device for a curved display screen as described in claim 1, characterized in that, The height of the protrusion is between 0.5 mm and 1 mm.

8. The bonding device for a curved display screen as described in claim 1, characterized in that, The orthographic projection of the protrusion on the second fixture includes a straight line, a rectangle, a parallelogram, a circle, or an arc.

9. The bonding device for a curved display screen as described in claim 1, characterized in that, The rigid material includes translucent acrylic.

10. The bonding device for a curved display screen as described in claim 1, characterized in that, A transition surface is provided between the protrusions on the second surface and other areas.

11. The bonding device for a curved display screen as described in claim 10, characterized in that, The transition surface includes a transition slope and a transition arc surface.

12. The bonding device for a curved display screen as described in claim 11, characterized in that, The inclination of the transition slope is between 15 and 20 degrees.

13. A bonding method using the bonding apparatus for a curved display screen as described in any one of claims 1-12, characterized in that, Includes the following steps: The cover plate and screen body of the curved display screen are placed between the first fixture and the second fixture; At least one of the first fixture and the second fixture is moved relative to each other such that the top corner of the cover plate and the screen body first contacts the position corresponding to the protrusion; Continue moving the first fixture and / or the second fixture so that the cover plate and the screen body contact each other sequentially from the top corner toward the middle position; During the process of bonding the cover plate to the screen body, bonding air bubbles are generated; the bonding air bubbles are discharged between the two apex corners located on the same side of the cover plate and the screen body, thus completing the bonding of the cover plate and the screen body.

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