Cover plate attaching method for curved screen and guide film

Abstract

Provided in the present application are a cover plate attaching method for a curved screen and a guide film. The attaching method comprises extending first corner portions of a main body of the guide film to form first extension portions, the first extension portions exceeding second corner portions of a display panel. Therefore, during attachment of a cover plate to the display panel, the first extension portions can effectively support the second corner portions of the display panel so as to control the wrinkle morphology of the second corner portions, thus reducing wrinkles to relieve the problem of wrinkles being liable to occur at Gaussian curved surfaces during existing attachment of four-curved screens.

Description

Cover plate attachment method and guide film for curved screen Technical Field

[0001] The present application relates to the field of display technology, and in particular to a cover plate attachment method and a guide film for a curved screen. Background Art

[0002] With the development of display technology, curved screens have become a hot topic in the current display field. The curvature of the side edges of a curved screen can increase the display area, improve the screen-to-body ratio, and provide users with a better sensory experience. Curved screens include dual-curved screens, formed by two opposing sides of the display with a certain curvature, and quad-curved screens, formed by four sides of the display with a certain curvature. For quad-curved screens, the intersection of two adjacent curved edges forms a Gaussian surface, which is prone to wrinkles when fitted. SUMMARY OF THE INVENTION

[0003] The present application provides a cover plate attachment method and a guide film for a curved screen, so as to alleviate the technical problem that wrinkles are easily generated at the Gaussian surface when four curved screens are attached.

[0004] To solve the above problems, the technical solutions provided by this application are as follows:

[0005] In a first aspect, an embodiment of the present application provides a method for attaching a cover plate to a curved screen, comprising:

[0006] Fixing the cover plate on the first fixing platform;

[0007] Attaching a display panel to a main body of a guide film, the main body including a plurality of first sides and a first corner connected to two adjacent first sides, and placing the guide film on a second fixing platform facing the first fixing platform so that the display panel faces the cover plate, the display panel including a second side and a second corner connected between two adjacent second sides;

[0008] Fixing a first extension portion of the guide film extending from the first corner portion toward a direction away from the main body portion to a first fixture on a peripheral side of the second fixing platform, with the first extension portion extending beyond the second corner portion of the display panel;

[0009] Fixing a second extension portion of the guide film extending from the first side portion in a direction away from the main body portion to a second fixture on a peripheral side of the second fixing platform, with the second extension portion extending beyond the second side portion of the display panel;

[0010] At least one of the first fixing platform and the second fixing platform is moved to make the cover plate fit the display panel.

[0011] In a second aspect, an embodiment of the present application further provides a guide film, comprising:

[0012] a main body portion, the main body portion including a plurality of first side portions and a first corner portion connected between two adjacent first side portions;

[0013] a first extension portion, the first extension portion extending from the first corner portion in a direction away from the main body portion; and

[0014] The second extension portion extends from the first side portion in a direction away from the main body portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] FIG1 is a schematic diagram of laminating a display substrate and a cover plate to form a four-curved screen in the related art.

[0017] FIG. 2 is a schematic top view of the structure of the substrate and the cover plate after being bonded together in FIG. 1 .

[0018] FIG3 is a schematic flow chart of a method for attaching a cover plate to a curved screen according to an embodiment of the present application.

[0019] FIG4 is a schematic diagram of the attachment of the cover plate and the display panel provided in an embodiment of the present application.

[0020] FIG5 is a schematic diagram of a top view of the structure of the guide film provided in an embodiment of the present application.

[0021] FIG. 6 is a schematic top view of the structure in which the guide film is fixed to the first clamp and the second clamp in FIG. 4 .

[0022] FIG7 is a schematic structural diagram of the curved screen formed by laminating the display panel and the cover plate in FIG4 .

[0023] FIG8 is a schematic diagram of the disassembled structure of the curved screen in FIG7 .

[0024] FIG. 9 is a schematic diagram showing the detailed structure of the second corner portion and the first extension portion in FIG. 6 .

[0025] FIG10 is another schematic diagram of a top view of the guide film provided in an embodiment of the present application.

[0026] FIG11 is another schematic diagram of a top view of the guide film provided in an embodiment of the present application. Modes for Carrying Out the Invention

[0027] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be implemented in. The directional terms mentioned in this application, such as [up], [down], [front], [back], [left], [right], [inside], [outside], [side], etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and understand the present application, rather than to limit the present application. In the figures, units with similar structures are represented by the same reference numerals. In the accompanying drawings, the thickness of some layers and areas is exaggerated for clarity of understanding and ease of description. That is, the size and thickness of each component shown in the drawings are arbitrarily shown, but the present application is not limited to this.

[0028] As the name suggests, a quad-curved screen is a flat screen with curved left and right sides, further enhanced with curved top and bottom surfaces. This means a quad-curved screen has curves in all four directions: top, bottom, left, and right. Compared to dual-curved screens, a quad-curved screen offers significant improvements in screen-to-body ratio and other aspects. A quad-curved screen is typically formed by laminating a display panel with a curved cover.

[0029] The inventors discovered that when a four-curved screen is bonded, there are horizontal and vertical curved overlapping areas at the four top corners. When the display panel is bonded into this curved overlapping area, it will be compressed. This curved overlapping area is called the Gaussian angle area, and the curved surface of this curved overlapping area is called the Gaussian surface. Based on the area of ​​the display panel bonded into the Gaussian angle area, the four-curved screen can be divided into false four-curved and true four-curved.

[0030] Among them, false four-curve means that the display panel does not enter the Gaussian angle area or enters less when it is bonded, so the display panel is subjected to less force, the strain of the entire display panel is also smaller, the risk of thin film packaging failure is low, and it is easier to produce. However, the disadvantage is that the display area of ​​the display panel cannot cover the Gaussian angle area, affecting the screen-to-body ratio and display effect of the four-curved screen.

[0031] True quad-curvature means the display panel fully enters the Gaussian angle region, allowing the Gaussian curve in this area to be displayed, thus achieving a quad-curved screen with a high screen-to-body ratio. However, as the area of ​​the display panel entering the Gaussian angle region increases, the display panel is subjected to greater compression. The greater the compression, the more pronounced the wrinkles formed by the Gaussian curve of the quad-curved screen, making the metal traces and inorganic layers within the display panel more susceptible to fracture and other failures during bonding.

[0032] For a true four-curve four-curved screen, the display panel and the cover plate are also bonded together with the aid of an attaching device. Specifically, referring to Figures 1 and 2, Figure 1 is a schematic diagram of bonding a display panel and a cover plate to form a four-curved screen in the related art, and Figure 2 is a schematic diagram of the top view of the structure after the display panel and the cover plate are bonded in Figure 1. Referring to Figure 6, the bonding process of the four-curved screen is roughly as follows: first, the cover plate 601 is fixed on the first fixing platform 701 of the attaching device, and the display panel 602 is bonded to the guide film (GF) 603. The guide film 603 is used to support and guide the deformation of the display panel 602; the edge of the guide film 603 is fixed to the clamp 702 of the attaching device, and the top platform 703 of the attaching device is located on the side of the guide film 603 away from the first fixing platform 701. The top platform 703 is fixed to the second fixing platform 704 of the attaching device. Then, the second fixing platform 704 is moved so that the top platform 703 lifts the guide film 603 and moves it closer to the cover plate 601, causing the guide film 603 to deform. The deformation of the guide film 603 will cause the display panel 602 to deform accordingly, thereby making the display panel 602 fit the cover plate 601, forming a four-curved screen as shown in FIG2 .

[0033] During the lamination process of the aforementioned four-curved screen, the laminating device's clamp 702 stretches the guide film 603 by applying tension to the portions of the guide film 603 corresponding to the four edges of the display panel 602 (for example, the portions of the guide film 603 extending beyond the four-curved screen 600, as shown in FIG2 ), and deforming the guide film 603 in conjunction with the action of the top platform 703. However, the Gaussian curved surface 604 formed by this lamination method at the Gaussian angle region of the four-curved screen 600 is prone to wrinkling. Furthermore, when the cover plate 601 and the display panel 602 are in contact with each other, there is a risk that the Gaussian angle region of the display panel 602 may prematurely contact the cover plate 601, resulting in lamination bubbles between the cover plate 601 and the display panel 602.

[0034] To this end, the present application provides a cover plate attachment method and a guide film for a curved screen to solve the above problems.

[0035] The embodiment of the present application provides a method for attaching a cover plate to a curved screen, which includes:

[0036] Fixing the cover plate on the first fixing platform;

[0037] Attaching a display panel to a main body of a guide film, the main body including a plurality of first sides and a first corner connected to two adjacent first sides, and placing the guide film on a second fixing platform facing the first fixing platform so that the display panel faces the cover plate, the display panel including a second side and a second corner connected between two adjacent second sides;

[0038] Fixing a first extension portion of the guide film extending from the first corner portion toward a direction away from the main body portion to a first fixture on a peripheral side of the second fixing platform, with the first extension portion extending beyond the second corner portion of the display panel;

[0039] Fixing a second extension portion of the guide film extending from the first side portion in a direction away from the main body portion to a second fixture on a peripheral side of the second fixing platform, with the second extension portion extending beyond the second side portion of the display panel;

[0040] At least one of the first fixing platform and the second fixing platform is moved to make the cover plate fit the display panel.

[0041] In the cover plate attaching method for a curved screen provided in an embodiment of the present application, there is a gap between adjacent first extending portions and second extending portions.

[0042] In the cover plate attachment method for a curved screen provided in an embodiment of the present application, at least one positioning hole is provided on each of the first extension portion and the second extension portion.

[0043] In the cover plate attachment method for a curved screen provided in an embodiment of the present application, the elastic modulus of the first extension portion is greater than or equal to 4 GPa, and the thickness of the first extension portion is greater than or equal to 100 microns; the elastic modulus of the second extension portion is greater than or equal to 4 GPa, and the thickness of the second extension portion is greater than or equal to 100 microns.

[0044] In the cover plate attachment method for a curved screen provided in an embodiment of the present application, the display panel also includes a display substrate and a support layer located on a side of the display substrate close to the guide film, the elastic modulus of the support layer is greater than or equal to 4 GPa, and the thickness of the support layer is greater than or equal to 100 microns.

[0045] In the cover attachment method for a curved screen provided in an embodiment of the present application, the arc length of the first extension portion close to the main body portion is less than or equal to the arc length of the second corner portion; the area of ​​the first extension portion is greater than the area of ​​the second corner portion.

[0046] In the cover plate attachment method for a curved screen provided in an embodiment of the present application, the width of the first extension portion on a side close to the main body portion is less than or equal to the width of the first extension portion on a side away from the main body portion.

[0047] In the cover plate attachment method for a curved screen provided in an embodiment of the present application, the shape of the first extension portion includes a strip, a sector, a circle, an ellipse, a trapezoid, and an arc.

[0048] In the cover plate attachment method for a curved screen provided in an embodiment of the present application, the outer contour line of the first extension portion is a curve.

[0049] In the cover plate attachment method for a curved screen provided in an embodiment of the present application, the first extension portion includes a first curved edge and a second curved edge extending from the main body portion toward and away from the main body portion, and a third curved edge connected to the first curved edge and the second curved edge. The protruding directions of the first curved edge and the second curved edge are opposite to each other, and the third curved edge protrudes in a direction away from the main body portion.

[0050] The present application also provides a guide film, which includes:

[0051] a main body portion, the main body portion including a plurality of first side portions and a first corner portion connected between two adjacent first side portions;

[0052] a first extension portion, the first extension portion extending from the first corner portion in a direction away from the main body portion; and

[0053] The second extension portion extends from the first side portion in a direction away from the main body portion.

[0054] In the guide film provided in the embodiment of the present application, there is a gap between adjacent first extending portions and second extending portions.

[0055] In the guide film provided in the embodiment of the present application, at least one positioning hole is provided on each of the first extension portion and the second extension portion.

[0056] In the guide film provided in the embodiment of the present application, the elastic modulus of the first extension portion is greater than or equal to 4 GPa, and the thickness of the first extension portion is greater than or equal to 100 micrometers.

[0057] In the guide film provided in the embodiment of the present application, the elastic modulus of the second extending portion is greater than or equal to 4 GPa, and the thickness of the second extending portion is greater than or equal to 100 micrometers.

[0058] In the guide film provided in the embodiment of the present application, the arc length of the first extension portion close to the main body portion is less than or equal to the arc length of the second corner portion; the area of ​​the first extension portion is greater than the area of ​​the second corner portion.

[0059] In the guide film provided in the embodiment of the present application, the width of the first extension portion on a side close to the main body portion is less than or equal to the width of the first extension portion on a side away from the main body portion.

[0060] In the guide film provided in the embodiment of the present application, the shape of the first extension portion includes a strip, a fan, a circle, an ellipse, a trapezoid, and an arc.

[0061] In the guide film provided in the embodiment of the present application, the outer contour line of the first extension portion is a curve.

[0062] In the guide film provided in the embodiment of the present application, the first extension portion includes a first curved edge and a second curved edge extending from the main body portion toward and away from the main body portion, and a third curved edge connected to the first curved edge and the second curved edge. The protruding directions of the first curved edge and the second curved edge are facing each other, and the third curved edge protrudes in a direction away from the main body portion.

[0063] The beneficial effects of the present application are as follows: in the cover plate attachment method and guide film of the curved screen provided by the present application, the attachment method includes fixing the cover plate on a first fixing platform; attaching the display panel to the main body of the guide film, the main body including a plurality of first edges and a first corner connected to two adjacent first edges, and placing the guide film on a second fixing platform facing the first fixing platform so that the display panel faces the cover plate, the display panel including a second edge and a second corner connected between two adjacent second edges; fixing the first extension portion of the guide film extending from the first corner in a direction away from the main body to a first clamp on the peripheral side of the second fixing platform, and the first extension portion exceeds the display The second corner of the panel; fixing the second extension portion formed by extending the guide film from the first edge toward the direction away from the main body to the second clamp on the peripheral side of the second fixing platform, and the second extension portion exceeds the second edge of the display panel; moving at least one of the first fixing platform and the second fixing platform to make the cover plate fit the display panel; the present application forms the first extension portion of the guide film at the position corresponding to the second corner of the display panel, so that when the display panel is fitted with the cover plate, the first extension portion can effectively support the second corner of the display panel, so as to control the wrinkle morphology of the second corner of the display panel, reduce wrinkles, and alleviate the problem that wrinkles are easily generated at the Gaussian surface when the existing four-curved screen is fitted.

[0064] The following describes various embodiments of the present application in detail with reference to the accompanying drawings:

[0065] Please refer to Figures 1 to 9, Figure 3 is a flow chart of the cover plate attachment method for the curved screen provided in an embodiment of the present application, Figure 4 is a schematic diagram of the attachment of the cover plate and the display panel provided in an embodiment of the present application, Figure 5 is a top-view structural schematic diagram of the guide film provided in an embodiment of the present application, Figure 6 is a top-view structural schematic diagram of the guide film fixed to the first clamp and the second clamp in Figure 4, Figure 7 is a structural schematic diagram of the curved screen formed after the display panel and the cover plate are attached in Figure 4, Figure 8 is a schematic diagram of the split structure of the curved screen in Figure 7, and Figure 9 is a schematic diagram of the detailed structure of the second corner and the first extension in Figure 6.

[0066] 3 to 6 , the cover plate attachment method for the curved screen includes the following steps:

[0067] S301: Fixing the cover plate 20 on the first fixing platform;

[0068] S302: attaching the display panel 10 to the main body 31 of the guide film 300, and placing the guide film 300 on a second fixing platform facing the first fixing platform, so that the display panel 10 faces the cover plate 20, the display panel 10 including a second side portion 11 and a second corner portion 12 connected between two adjacent second side portions 11;

[0069] S303 : Fixing the first extension portion 32 of the guide film 300 extending from the main body portion 31 and extending beyond the second corner portion 12 of the display panel 10 on the first fixture 204 on the periphery of the second fixing platform;

[0070] S304: Fixing the second extension portion 33 of the guide film 300 extending from the main body portion 31 and extending beyond the second side portion 11 of the display panel 10 on the second fixture 203 on the peripheral side of the second fixing platform;

[0071] S305 : moving at least one of the first fixing platform 201 and the second fixing platform 202 to attach the cover plate 20 to the display panel 10 .

[0072] Referring to Figure 4 , the method for attaching the cover plate 20 of the curved screen 100 is used to attach the cover plate 20 and the display panel 10 together using an attaching device 200 to form the curved screen 100. The curved screen 100 is a true four-curved screen, comprising a display panel 10 and a cover plate 20. The attaching device 200 includes a first fixing platform 201 and a second fixing platform 202 positioned opposite each other, as well as clamps (such as the first clamp 204 and the second clamp 203 shown in Figures 4 and 6 ) positioned around the second fixing platform 202. During the attaching process of the cover plate 20 and the display panel 10, a guide film 300 is used to guide the deformation of the display panel 10, thereby forming a wrinkle-free curved screen 100.

[0073] The display panel 10 includes a light emitting surface and a back surface facing away from the light emitting surface. The guide film 300 is arranged on the back surface of the display panel 10 and is attached to the display panel 10. The display panel 10 is a flexible display panel, for example, the display panel 10 can be a flexible organic light emitting diode display (OLED) panel. After the display panel 10 is attached to the guide film 300, it is placed on the second fixed platform 202 of the attaching device 200, and the display panel 10 is located on the side of the guide film 300 away from the second fixed platform 202. The attaching device 200 also includes a top platform 205, which is fixed on the second fixed platform 202, and the guide film 300 is placed on the top platform 205. The top platform 205 is used to apply a force to the guide film 300 to cause the guide film 300 to deform.

[0074] Specifically, referring to Figure 5, the guide film 300 includes a main body 31, a first extension portion 32, and a second extension portion 33. The main body 31 includes a plurality of first side portions 311 and a first corner portion 312 connecting two adjacent first side portions 311. The number of the first side portions 311 is equal to the number of the first corner portions 312. The first extension portion 32 extends from the first corner portion 312 away from the main body 31. The second extension portion 33 extends from the first side portion 311 away from the main body 31.

[0075] Specifically, adjacent first extensions 32 and second extensions 33 are spaced apart. Some of the plurality of second extensions 33 extend along a first direction X, while others extend along a second direction Y. The first direction X and the second direction Y are different, for example, perpendicular to each other. The first extensions 32 extend in a direction different from the first direction X and the second direction Y.

[0076] 5 and 6 , the display panel 10 is attached to the main body 31 of the guide film 300, that is, it is bonded to the main body 31 of the guide film 300. The display panel 10 includes second side portions 11 and second corner portions 12 connected between two adjacent second side portions 11. The second side portions 11 are bonded to the first side portions 311, and the second corner portions 12 are bonded to the first corner portions 312. The number of first side portions 311 is equal to the number of second side portions 11, and the number of first corner portions 312 is equal to the number of second corner portions 12. The first extension portion 32 extends from the first corner portion 312 of the main body 31 away from the main body 31 and extends beyond the second corner portion 12 of the display panel 10. The second extension portion 33 extends from the first side portion 311 of the main body 31 away from the main body 31 and extends beyond the second side portion 11 of the display panel 10.

[0077] The second side portion 11 and the second corner portion 12 of the display panel 10 are connected end to end to form the outer edge of the display panel 10, wherein the second corner portion 12 is located between two adjacent second side portions 11, and the second side portion 11 is also located between two adjacent second corner portions 12. The second side portion 11 is a straight line, and the second corner portion 12 is a curve. As shown in FIG6 , the display panel 10 includes four second side portions 11 and four second corner portions 12, but the present application is not limited to this. The second corner portion 12 is located at the top corner of the display panel 10. Correspondingly, the first side portion 311 and the first corner portion 312 of the main body portion 31 are connected end to end to form the outer edge of the main body portion 31, wherein the first corner portion 312 is located between two adjacent first side portions 311, and the first side portion 311 is also located between two adjacent first corner portions 312. The first side portion 311 is a straight line, and the first corner 312 is a curve. 5 schematically shows that the main body 31 includes four first side portions 311 and four first corner portions 312 , but the present application is not limited thereto. The first corner portions 312 are located at the top corners of the main body 31 .

[0078] It should be noted that the vertex corners of the display panel 10 refer to the intersection of two adjacent sides of the display panel 10. The number of vertex corners of the display panel 10 depends on the number of sides of the display panel 10. For example, when the display panel 10 includes four sides, the number of vertex corners is four. When the display panel 10 includes five sides, the number of vertex corners is five. This embodiment of the present application uses the display panel 10 having four sides as an example. When the display panel 10 includes four sides, the display panel 10 includes four second corner portions 12 and four second side portions 11, each second side portion 11 corresponding to a side of the display panel 10. Each second side portion 11 is located between two adjacent second corner portions 12, and each second corner portion 12 is located between two adjacent second side portions 11. Each second corner portion 12 is formed by the intersection of two adjacent second side portions 11. The definition of the vertex corners of the main body portion 31 can be referred to the definition of the vertex corners of the display panel 10. The number of vertex corners of the main body portion 31 depends on the number of vertex corners of the display panel 10.

[0079] 4 and 6 , the first extension portion 32 is fixed to the first clamp 204, and the second extension portion 33 is fixed to the second clamp 203. The first clamp 204 is used to cooperate with the top platform 205 to apply a tensile force to the first extension portion 32, and the second clamp 203 is used to cooperate with the top platform 205 to apply a tensile force to the second extension portion 33, so as to stretch the guide film 300, causing the guide film 300 to deform, thereby causing the display panel 10 to deform, and thus causing the display panel 10 to fit the cover plate 20.

[0080] Specifically, the second fixing platform 202 moves toward the first fixing platform 201. The movement of the second fixing platform 202 drives the movement of the top platform 205. The top platform 205 generates a thrust on the guide film 300 toward the first fixing platform 201, causing the guide film 300 to deform. The deformation of the guide film 300 drives the deformation of the display panel 10, causing the display panel 10 to first contact the middle planar area of ​​the cover plate 20 on the first fixing platform 201, and then contact from the middle area to the edge areas, thereby laminating the display panel 10 to the cover plate 20. The cover plate 20 includes a flat area and a curved area. The curved area of ​​the cover plate 20 is the curved surface to be formed on the curved screen 100.

[0081] Of course, during the movement of the second fixed platform 202, the first fixed platform 201 may also move toward the second fixed platform 202 at the same time, and / or the first clamp 204 and the second clamp 203 may also move in the direction opposite to the movement direction of the second fixed platform 202 at the same time to speed up the bonding efficiency of the display panel 10 and the cover plate 20.

[0082] Optionally, the first extension portion 32 is integrally formed with the main body portion 31. The first extension portion 32 is configured to support the second corner 12 of the display panel 10 and guide deformation of the second corner 12 during the bonding process between the display panel 10 and the cover plate 20, so that the second corner 12 of the display panel 10 forms the Gaussian surface. The second extension portion 33 is also integrally formed with the main body portion 31. The second extension portion 33 is configured to support the second side 11 of the display panel 10 and guide deformation of the second side 11 during the bonding process between the display panel 10 and the cover plate 20, so that the second side 11 of the display panel 10 forms a corresponding curved surface structure. A gap is provided between adjacent first extension portions 32 and second extension portions 33 to prevent interference between the first extension portion 32 and the second extension portion 33.

[0083] In this embodiment, the guide film 300 forms the first extension portion 32 at a position corresponding to the second corner 12 of the display panel 10, and the first extension portion 32 exceeds the second corner 12. The guide film 300 forms the second extension portion 33 at a position corresponding to the second side 11 of the display panel 10, and the second extension portion 33 exceeds the second side 11. In this way, when the display panel 10 and the cover plate 20 are bonded, the first clamp 204 and the second clamp 203 of the attaching device 200 cooperate with the top platform 205 to stretch the guide film 300, so that the guide film 300 is deformed, thereby driving the display panel 10 to deform, so that the display panel 10 forms the required curved structure. Specifically, when the first clamp 204 and the second clamp 203 of the attaching device 200 cooperate with the top platform 205 to stretch the guide film 300, the first extension portion 32 can effectively support the second corner 12 of the display panel 10 and guide the second corner 12 of the display panel 10 to deform, so as to control the wrinkle morphology of the second corner 12 of the display panel 10, thereby reducing the wrinkles of the Gaussian surface of the curved screen 100 formed after the display panel 10 and the cover plate 20 are bonded, alleviating the problem that wrinkles are easily generated at the Gaussian surface when the existing four-curved screen 100 is bonded, and can also avoid the second corner 12 of the display panel 10 from contacting the cover plate 20 in advance to generate bubbles; the second extension portion 33 can effectively support the second side 11 of the display panel 10 and guide the second side 11 of the display panel 10 to deform, so as to control the wrinkle morphology of the second side 11 of the display panel 10.

[0084] The curved screen 100 formed after the display panel 10 and the cover plate 20 are bonded together is shown in Figure 7 . The curved screen 100 further includes a planar portion 111 and a curved portion 112 located to one side of the planar portion 111. The curved portion 112 surrounds the planar portion 111. The dotted line in Figure 7 is the boundary between the planar portion 111 and the curved portion 112, and also the boundary between the second corner 12 and the second side 11 of the display panel 10. The curved portion 112 includes a first curved surface structure 1122 located at the second corner 12 of the display panel 10, and a second curved surface structure 1121 located at the second side 11 of the display panel 10. The first curved surface structure 1122 is different from the second curved surface structure 1121 and is a Gaussian surface.

[0085] Referring to Figure 8 , the curved screen 100 includes the display panel 10 and the cover plate 20. Optionally, the display panel 10 includes a display substrate 13 and a support layer 14 and a polarizer 15 located on opposite sides of the display substrate 13. The support layer 14 is disposed on the side of the display substrate 13 away from the cover plate 20 and on the side of the display substrate 13 closer to the guide film 300. The guide film 300 is laminated to the support layer 14 of the display panel 10. The support layer 14 is used to support and protect the display substrate 13. The material of the support layer 14 includes polyethylene terephthalate (PET), etc.

[0086] The polarizer 15 is disposed on a side of the display substrate 13 away from the support layer 14 and is bonded to the display substrate 13. Furthermore, the polarizer 15 is positioned between the display substrate 13 and the cover plate 20 and bonded to the cover plate 20 via an adhesive layer 16. The adhesive layer 16 includes a transparent optical adhesive, such as an optical clear adhesive (OCA). The polarizer 15 is used to reduce the surface reflectivity of the display panel 10.

[0087] The specific structure of the guide film 300 will be described below.

[0088] 6 and 9 , the arc length L2 of the first extension portion 32 close to the main body portion 31 is less than or equal to the arc length L1 of the second corner portion 12 , and the area of ​​the first extension portion 32 is larger than the area of ​​the second corner portion 12 , so that the first extension portion 32 can well support and guide the deformation of the top corner of the display panel 10 and effectively avoid interference between the first extension portion 32 and the second extension portion 33 .

[0089] In one embodiment, the elastic modulus of the first extension portion 32 is greater than or equal to 4 GPa, and the thickness of the first extension portion 32 is greater than or equal to 100 microns, so as to better control the wrinkle morphology of the second corner portion 12 formed at the top corner of the display panel 10, thereby reducing or eliminating wrinkles. Of course, the second extension portion 33 can also be made of a material with a higher elastic modulus and have a greater thickness, like the first extension portion 32, to better control the morphology of the second side portion 11 formed at the edge of the display panel 10. For example, the elastic modulus of the second extension portion 33 is greater than or equal to 4 GPa, and the thickness of the second extension portion 33 is greater than or equal to 100 microns.

[0090] In one embodiment, the elastic modulus of the first extension portion 32 may be greater than the elastic modulus of the main body portion 31, and / or the thickness of the first extension portion 32 may be greater than the thickness of the main body portion 31, thereby effectively controlling the wrinkle morphology of the second corner portion 12 formed at the top corner of the display panel 10, reducing or eliminating wrinkles, and reducing material costs.

[0091] Furthermore, the elastic modulus of the support layer 14 is greater than or equal to 4 GPa, and the thickness of the support layer 14 is greater than or equal to 100 microns, so as to further effectively control the wrinkle morphology of the second corner portion 12 formed at the top corner of the display panel 10, thereby reducing or eliminating wrinkles.

[0092] Optionally, the width of the first extension portion 32 on the side close to the main body portion 31 is less than or equal to the width of the first extension portion 32 on the side away from the main body portion 31, so as to increase the area of ​​the first extension portion 32 while avoiding interference between the first extension portion 32 and the second extension portion 33, thereby improving the stability of the fixation of the first extension portion 32. For example, the larger the area of ​​the first extension portion 32, the larger the contact area between the first extension portion 32 and the first clamp 204 of the attachment device 200, which is more conducive to the fixation between the first clamp 204 and the first extension portion 32.

[0093] Optionally, the outer contour of the first extension portion 32 is a curve, for example, the first extension portion 32 is fan-shaped. In this case, the width of the first extension portion 32 on the side closer to the main portion 31 is smaller than the width of the first extension portion 32 on the side farther from the main portion 31. The first extension portion 32 includes a first curved side 321 and a second curved side 322 extending from the main portion 31 away from the main portion 31, and a third curved side 323 connecting the first curved side 321 and the second curved side 322. The first curved side 321 and the second curved side 322 protrude in opposite directions, and the third curved side 323 protrudes in a direction away from the main portion 31.

[0094] In one embodiment, please refer to Figures 1 to 10. Figure 10 is a schematic top view of another guide film structure provided in an embodiment of the present application. Unlike the above embodiment, in the guide film 300 of this embodiment, the first extension portion 32 is in the shape of an elongated strip. Of course, the present application is not limited to this. The shape of the first extension portion 32 of the present application can also be a regular or irregular shape such as a circle, an ellipse, a trapezoid, or an arc. For other explanations, please refer to the above embodiment and will not be repeated here.

[0095] In one embodiment, please refer to Figures 1 to 11. Figure 11 is another schematic diagram of the top view structure of the guide film provided in the embodiment of the present application. Different from the above embodiment, in the guide film 300 of this embodiment, at least one positioning hole is provided on each of the first extension portion 32 and the second extension portion 33 to further improve the stability of the fixation of the first extension portion 32 and the second extension portion 33. Optionally, a first positioning hole 320 is provided on the first extension portion 32, and a second positioning hole 330 is provided on the second extension portion 33. The shape of the first positioning hole 320 may be the same as or different from the shape of the second positioning hole 330. Please refer to the above embodiment for other explanations, which will not be repeated here.

[0096] According to the above embodiments, it can be seen that:

[0097] In the cover plate attachment method and guide film of the curved screen provided in the present application, the attachment method includes fixing the cover plate on a first fixing platform; attaching the display panel to the main body of the guide film, the main body including a plurality of first edges and a first corner connected to two adjacent first edges, and placing the guide film on a second fixing platform facing the first fixing platform so that the display panel faces the cover plate, the display panel including a second edge and a second corner connected between two adjacent second edges; fixing the first extension portion of the guide film extending from the first corner in a direction away from the main body to a first clamp on the peripheral side of the second fixing platform, and the first extension portion exceeds the first corner of the display panel two corners; fixing the second extension portion formed by extending the guide film from the first edge portion in a direction away from the main body portion on a second fixture on the peripheral side of the second fixed platform, and the second extension portion exceeds the second edge portion of the display panel; moving at least one of the first fixed platform and the second fixed platform to make the cover plate fit the display panel; the present application forms the first extension portion of the guide film at a position corresponding to the second corner of the display panel, so that when the display panel is fitted with the cover plate, the first extension portion can effectively support the second corner of the display panel, so as to control the wrinkle morphology of the second corner of the display panel, reduce wrinkles, and alleviate the problem that wrinkles are easily generated at the Gaussian surface when the existing four-curved screen is fitted.

[0098] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0099] The above is a detailed introduction to the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for attaching a cover plate of a curved screen, comprising: Fixing the cover plate on the first fixing platform; Attaching a display panel to a main body of a guide film, wherein the main body includes a plurality of first sides and a first corner connected to two adjacent first sides, and placing the guide film on a second fixing platform facing the first fixing platform, so that the display panel faces the cover plate, and the display panel includes a second side and a second corner connected between two adjacent second sides; Fixing a first extension portion of the guide film extending from the first corner portion in a direction away from the main body portion to a first fixture on a peripheral side of the second fixing platform, wherein the first extension portion exceeds the second corner portion of the display panel; Fixing a second extension portion of the guide film extending from the first side portion toward a direction away from the main body portion to a second fixture on a peripheral side of the second fixing platform, wherein the second extension portion exceeds the second side portion of the display panel; At least one of the first fixing platform and the second fixing platform is moved to make the cover plate fit the display panel.

2. The method for attaching a cover plate to a curved screen according to claim 1, wherein: There is a gap between adjacent first extending portions and second extending portions.

3. The method for attaching a cover plate to a curved screen according to claim 2, wherein: At least one positioning hole is disposed on each of the first extension portion and the second extension portion.

4. The method for attaching a cover plate to a curved screen according to claim 2, wherein: The elastic modulus of the first extension portion is greater than or equal to 4 GPa, and the thickness of the first extension portion is greater than or equal to 100 microns; the elastic modulus of the second extension portion is greater than or equal to 4 GPa, and the thickness of the second extension portion is greater than or equal to 100 microns.

5. The cover plate attaching method for a curved screen according to claim 1, wherein: The display panel further includes a display substrate and a support layer located on a side of the display substrate close to the guide film, the elastic modulus of the support layer is greater than or equal to 4 GPa, and the thickness of the support layer is greater than or equal to 100 micrometers.

6. The method for attaching a cover plate to a curved screen according to any one of claims 1 to 5, wherein: The arc length of the first extension portion on one side close to the main body portion is less than or equal to the arc length of the second corner portion; and the area of ​​the first extension portion is greater than the area of ​​the second corner portion.

7. The method for attaching a cover plate to a curved screen according to claim 6, wherein: The width of the first extension portion at a side close to the main body portion is smaller than or equal to the width of the first extension portion at a side away from the main body portion.

8. The method for attaching a cover plate to a curved screen according to claim 7, wherein: The shape of the first extension portion includes a strip, a sector, a circle, an ellipse, a trapezoid, and an arc.

9. The method for attaching a cover plate to a curved screen according to claim 7, wherein: The outer contour line of the first extension portion is a curve.

10. The method for attaching a cover plate to a curved screen according to claim 9, wherein: The first extension portion includes a first curved edge and a second curved edge extending from the main body portion toward and away from the main body portion, and a third curved edge connected to the first curved edge and the second curved edge. The protruding directions of the first curved edge and the second curved edge face each other, and the third curved edge protrudes in a direction away from the main body portion.

11. A guide film comprising: A main body, the main body comprising a plurality of first side portions and a first corner portion connected between two adjacent first side portions; a first extension portion, the first extension portion extending from the first corner portion in a direction away from the main body portion; as well as The second extension portion extends from the first side portion toward a direction away from the main body portion.

12. The guide film according to claim 11, wherein There is a gap between adjacent first extending portions and second extending portions.

13. The guide film according to claim 12, wherein: At least one positioning hole is disposed on each of the first extension portion and the second extension portion.

14. The guide film according to claim 12, wherein: The elastic modulus of the first extension portion is greater than or equal to 4 GPa, and the thickness of the first extension portion is greater than or equal to 100 micrometers.

15. The guide film according to claim 11, wherein The elastic modulus of the second extension portion is greater than or equal to 4 GPa, and the thickness of the second extension portion is greater than or equal to 100 micrometers.

16. The guide film according to claim 11, wherein The arc length of the first extension portion on one side close to the main body portion is less than or equal to the arc length of the second corner portion; and the area of ​​the first extension portion is greater than the area of ​​the second corner portion.

17. The guide film according to claim 11, wherein The width of the first extension portion at a side close to the main body portion is smaller than or equal to the width of the first extension portion at a side away from the main body portion.

18. The guide film according to claim 17, wherein The shape of the first extension portion includes a strip, a sector, a circle, an ellipse, a trapezoid, and an arc.

19. The guide film according to claim 17, wherein: The outer contour line of the first extension portion is a curve.

20. The guide film according to claim 19, wherein The first extension portion includes a first curved edge and a second curved edge extending from the main body portion toward and away from the main body portion, and a third curved edge connected to the first curved edge and the second curved edge. The protruding directions of the first curved edge and the second curved edge face each other, and the third curved edge protrudes in a direction away from the main body portion.

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