Display module and preparation method thereof

Abstract

The embodiment of the invention discloses a display module and a preparation method thereof. In a specific implementation mode, the method comprises the steps that a polaroid and a display panel are provided, and the polaroid is in a regular shape; a polaroid and a display panel are aligned and attached, the display panel comprises a first area covered by the polaroid and an exposed second area, and a gluing area of the display panel comprises a first gluing area arranged at the edge position, close to the first area, of the second area; cutting: cutting the display panel and the polaroid along a first cutting path and cutting a second area of the display panel along a second cutting path intersected with the first cutting path; the second area of the display panel is bent to the back side, and the bending area is located in the gluing area. According to the embodiment, the manufacturing cost of the polaroid is effectively reduced; the edge of the polaroid can be flush with the edge of the display panel, and no segment difference structure exists; and the overall sealing performance of the display module is effectively improved.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and more specifically, to a display module and a method for preparing the same. Background Art

[0002] At present, in the related technologies of display modules, there is a problem that when COP (Chip On PI) packaging is performed, the sides of the display panel and the polarizer outside the bending area are designed as an integrated whole, and the polarizer needs to be designed with a special-shaped groove, thereby increasing the production cost of the display module. Summary of the invention

[0003] The purpose of the present disclosure is to provide a display module and a method for manufacturing the same, so as to solve at least one of the problems existing in the prior art.

[0004] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0005] A first aspect of the present disclosure provides a method for preparing a display module, comprising the following steps:

[0006] A polarizer and a display panel are provided, wherein the shape of the polarizer is a regular shape;

[0007] Aligning and laminating the polarizer with the display panel, wherein the display panel includes a first area covered by the polarizer and an exposed second area, and the glue-coated area of ​​the display panel includes a first glue-coated area disposed at an edge position of the second area close to the first area;

[0008] Performing cutting, including cutting the display panel and the polarizer along a first cutting path respectively and cutting a second area of ​​the display panel along a second cutting path intersecting the first cutting path;

[0009] The second area of ​​the display panel is bent to the back side, and the bent area is located in the glue-coated area.

[0010] Optionally, the distance between the sections at the two end positions of the first edge of the polarizer in the first cutting path corresponding to the first edge of the polarizer and the first edge of the polarizer is greater than the cutting tolerance of the first cutting path, and the first edge of the polarizer corresponds to the edge of the first area close to the second area.

[0011] Optionally, after the cutting and before the bending the second area of ​​the display panel to the back side, the method further comprises: coating protective glue on the glue coating area.

[0012] Optionally, aligning and laminating the polarizer and the display panel comprises: coating a first adhesive layer on the polarizer, wherein an edge position of the polarizer corresponding to the first area and close to the second area forms a blank area not coated with the first adhesive layer;

[0013] The polarizer is aligned and bonded to the display panel using the first adhesive layer.

[0014] Optionally, before aligning and laminating the polarizer and the display panel, the method further includes: applying protective glue on the glue-coated area, the glue-coated area including a first glue-coated area arranged at an edge position of the second area close to the first area and a second glue-coated area arranged at an edge position of the first area close to the second area.

[0015] Optionally, in a first direction, the length of the second glue-coated area is smaller than the length of the blank area, and the first direction is a direction from the first area to the second area.

[0016] Optionally, the protective adhesive is a light-curing adhesive.

[0017] Optionally, providing the polarizer includes: coating a first adhesive layer on a polarizer motherboard, wherein the first adhesive layer includes a plurality of hollow regions spaced apart along a center line in a row direction of the polarizer motherboard;

[0018] The polarizer motherboard is cut, including row-direction cutting at the row-direction center line of the polarizer motherboard and multiple column-direction cutting at the gaps between adjacent hollow areas, to obtain a plurality of polarizers.

[0019] Optionally, before bending the second area of ​​the display panel to the back side, the method further comprises: removing a back film of a third area of ​​the display panel, the third area corresponding to the orthographic projection of the bending area.

[0020] A second aspect of the present disclosure provides a display module prepared according to the method, comprising a display panel and a polarizer located on a light emitting surface of the display panel, wherein the display panel is an organic light emitting semiconductor display panel.

[0021] The beneficial effects of the present disclosure are as follows:

[0022] The technical solution disclosed in the present invention, by providing a polarizer with a regular shape, can effectively reduce the production cost of the polarizer and simplify the production process of the polarizer compared to the polarizer with a special-shaped groove design; at the same time, the edge of the polarizer can be made flush with the edge of the display panel without a step structure, thereby reducing the overall width of the frame of the display module and improving the user experience; and it can effectively improve the overall sealing of the display module and meet the waterproof design requirements of the entire product. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The specific implementation methods of the present disclosure are further described in detail below with reference to the accompanying drawings.

[0024] Figure 1 The figure shows a schematic diagram of the design process flow of a flexible organic electroluminescent display module in the related art.

[0025] Figure 2 A schematic diagram showing the removal of the protective film on the back of the bending area after applying protective glue on the bending area in the related art.

[0026] Figure 3 A schematic diagram showing laser cutting according to the appearance of the display panel after removing the protective film on the back of the bending area in the related art is shown.

[0027] Figure 4 A flow chart showing a method for preparing a display module provided by a first embodiment of the present disclosure.

[0028] Figure 5 A schematic diagram of the structure after aligning and laminating the polarizer and the display panel in the method for preparing the display module provided by the first embodiment of the present disclosure is shown.

[0029] Figure 6 A schematic structural diagram of cutting in a method for preparing a display module provided in a first embodiment of the present disclosure is shown.

[0030] Figure 7 A schematic diagram of the structure after cutting in the method for preparing a display module provided in the first embodiment of the present disclosure is shown.

[0031] Figure 8 A schematic structural diagram of a polarizer in a method for preparing a display module provided in a second embodiment of the present disclosure is shown.

[0032] Fig. 9 A schematic diagram of a process flow of a display module provided by a second embodiment of the present disclosure is shown.

[0033] Fig.10 A schematic diagram of the structure after cutting in the method for preparing a display module provided in the second embodiment of the present disclosure is shown.

[0034] Fig.11 A schematic structural diagram is shown after the second area of ​​the display panel is bent to the back side in the method for preparing the display module provided by the second embodiment of the present disclosure.

[0035] Fig.12 A schematic diagram of a process flow of providing a polarizer in a method for preparing a display module provided in a second embodiment of the present disclosure is shown.

[0036] Fig.13 A schematic structural diagram of a display module prepared according to the method for preparing a display module disclosed in the present invention is shown. DETAILED DESCRIPTION

[0037] The terms “on”, “formed on” and “disposed on” in the present disclosure may mean that one layer is directly formed or disposed on another layer, or may mean that one layer is indirectly formed or disposed on another layer, i.e., there are other layers between the two layers.

[0038] It should be noted that, although the terms "first", "second", etc. may be used herein to describe various parts, components, elements, regions, layers and / or parts, these parts, components, elements, regions, layers and / or parts should not be limited by these terms. Instead, these terms are used to distinguish one part, component, element, region, layer and / or part from another. Thus, for example, the first part, first member, first element, first region, first layer and / or first part discussed below may be referred to as the second part, second member, second element, second region, second layer and / or second part without departing from the teachings of the present disclosure.

[0039] In the present disclosure, unless otherwise specified, the term "same-layer arrangement" used refers to two layers, parts, components, elements or parts that can be formed by the same preparation process (such as a patterning process, etc.), and the two layers, parts, components, elements or parts are generally formed of the same material. For example, two or more functional layers are arranged in the same layer, which means that these functional layers arranged in the same layer can be formed using the same material layer and the same preparation process, thereby simplifying the preparation process of the display substrate.

[0040] In the present disclosure, unless otherwise specified, the expression "patterning process" generally includes steps such as photoresist coating, exposure, development, etching, photoresist stripping, etc. The expression "one-time patterning process" means a process of forming patterned layers, components, members, etc. using one mask.

[0041] With the development of electronic technology and the improvement of people's living standards, mobile electronic products such as mobile phones are attracting more and more attention. Among them, display devices with narrow bezels and strong waterproofness are becoming more and more popular among the public.

[0042] like Figure 1 The figure shows a schematic diagram of the design process flow of a flexible organic light emitting diode (OLED) display panel in the related art. Figure 1In the figure, a1 is a schematic diagram of the structure of the module, in which a substrate unit (Cell) 101, a display panel (Panel) 102 and a display area (Active Area, AA) 103 are shown; b1 is a schematic diagram of the structure of a polarizer (POL), and the shape of the polarizer is an irregular shape with a groove; c1 is a schematic diagram of the structure after aligning and bonding the module a1 and the polarizer b1; d1 is a schematic diagram of the structure after aligning and bonding the module a1 and the polarizer b1 and applying protective glue on the bending area of ​​the display panel, including a display panel outer shape cutting line (e.g., laser line) 104 and a protective glue coating area 105 in the bending area of ​​the display panel.

[0043] Further, such as Figure 1 As shown, in the process flow of designing the polarizer and the four sides of the display panel as an integrated whole except the bending area (Chip OnPi Bending, COP Bending) in the packaging process of the chip being set on the display panel, specifically including designing the polarizer to be special-shaped so that the lower edge of the polarizer is formed with two protrusions protruding from the lower side of the polarizer, and the COP Bending has protrusions at both ends; aligning and bonding the polarizer and the display panel; and applying protective glue on the bending area of ​​the display panel.

[0044] Further, such as Figure 2 It is a schematic diagram of removing the protective film on the back of the bending area after applying protective glue on the bending area in the related art, a2 is a top view of removing the protective film (i.e., back film) on the back of the bending area after applying protective glue on the bending area, a2 shows the protective film 201 on the back of the bending area to be removed; b2 is a side view of a2; c2 is an enlarged view of point A in b2, c2 includes the protective film 201 on the back of the bending area to be removed and the protective glue coating area 105 of the bending area of ​​the display panel.

[0045] Furthermore, after removing the protective film 201 on the back of the bending area, laser cutting is performed according to the appearance of the display panel. Figure 3 It is a schematic diagram of laser cutting according to the shape of the display panel after removing the protective film on the back of the bending area in the related technology, wherein a3 is a top view of laser cutting according to the shape of the display panel after removing the protective film on the back of the bending area, a3 shows the display area 103, the protective glue coating area 105 of the bending area of ​​the display panel, the cut display panel 301 and the cut polarizer 302; b3 is an enlarged view of point B in a3, including the cut display panel 301 at both ends of COPBending and the step-free area 303 of the cut polarizer 302.

[0046] In the related art, in order to achieve a zero-step design for low-end polarizers and display panels, low-end polarizers are usually designed with special shapes so that the protrusions at the left and right ends of the polarizer cover the laser path of the display panel shape. When the display panel and the polarizer are laser cut, the display panel needs to have laser redundant (Dummy) material. According to the different laser tolerances of each company, the redundant width of the polarizer exceeding the display panel shape varies. Finally, after laser cutting, the display panel and the polarizer have zero-step areas at both ends of the COP Bending area.

[0047] Therefore, in the related art, the whole machine client waterproof design display module part requires that the surrounding polarizers and the display panel sides are designed as one piece except for COP Bending. In order to meet this design, the polarizer needs to be made into a special-shaped groove. At present, due to the polarizer manufacturing process, this groove cannot be cut and formed, and needs to be processed by grinding, which leads to a significant increase in the cost of the polarizer monomer.

[0048] In view of this, an embodiment of the present disclosure provides a method for preparing a display module, such as Figure 4 As shown, the following steps are included:

[0049] Step S1: providing a polarizer and a display panel, wherein the shape of the polarizer is a regular shape;

[0050] In a specific example, the display panel is a flexible OLED display panel.

[0051] In a specific example, the shape of the polarizer can be a regular shape such as a rectangle, a square, a rounded rectangle, or a rounded square.

[0052] Compared with the irregular-shaped polarizer in the related art, the regularly-shaped polarizer in this example does not need to be ground to form irregular grooves, which can effectively reduce the production cost of the polarizer and simplify the production process of the polarizer.

[0053] Step S2: Aligning and laminating the polarizer and the display panel, wherein the display panel includes a first area covered by the polarizer and an exposed second area, and the glue-coated area of ​​the display panel includes a first glue-coated area disposed at an edge position of the second area close to the first area;

[0054] In a specific example, Figure 5 It is a schematic diagram of the structure after the polarizer and the display panel are aligned and bonded, wherein a5 is a top view after the polarizer and the display panel are aligned and bonded, and b5 is an enlarged view of point C in a5. Figure 5Shown are the display area 501, the display panel 502, the substrate unit 503, the polarizer 504, the laser redundant width 505 of the display panel 502 and the polarizer 504, the first glue coating area 506, the protective film area 507 on the back of the bending area to be removed, the first area 508, the second area 509 and the lower side 511 of the polarizer 504.

[0055] Further, such as Figure 5 As shown, when the polarizer 504 is aligned and bonded to the display panel 502 , the lower side 511 of the polarizer 504 is bonded to the lower surface of the display panel 502 , and the display panel 502 includes a first area 508 covered by the polarizer 504 and a second area 509 exposed outside the polarizer 504 .

[0056] Further, such as Figure 5 As shown, the second area 509 includes a first glue-coated area 506 and a non-glue-coated area, wherein the non-glue-coated area is the area to be cut; the first glue-coated area 506 is set at the edge position of the second area 509 close to the first area 508; the starting position of the first glue-coated area 506 is the lower side edge 511 of the polarizer 504.

[0057] Further, such as Figure 5 As shown, when the first glue-coated area 506 is subjected to COP packaging, that is, the second area 509 is bent downward for packaging, the first glue-coated area 506 is coated with protective glue to protect the display panel 502 .

[0058] In a specific example, Figure 5 As shown, the starting position of the first glue coating area 506 in this example is moved downward relative to the starting position of the glue coating area in the related art. This is because the starting position of the glue coating area in the related art is the bottom edge of the polarizer recessed between the two protrusions on the lower surface of the display panel close to the polarizer, while the starting position of the first glue coating area 506 in this example is the lower side edge 511 of the polarizer 504 attached to the lower surface of the display panel 502, rather than the bottom edge of the polarizer recessed between the two protrusions of the polarizer in the related art.

[0059] In a specific example, Figure 5As shown, in this example, the boundary line between the first area 508 and the second area 509 of the display panel 502 in the Y direction is the starting position of the first glue-coated area 506 of the display panel 502, that is, there is no spacing between the starting position of the first glue-coated area 506 in this example and the lower side edge 511 of the polarizer 504. In the related art, it is necessary to grind a polarizer of a regular shape to obtain a special-shaped polarizer, and the lower side edge of the special-shaped polarizer is formed with two protrusions protruding from the lower side edge of the polarizer, and the left edge and the right edge of the lower side of the polarizer are respectively formed with a protrusion, and the concave part between the two protrusions is used to expose the glue-coated area on the display panel when it is attached to the display panel, that is, there is a certain spacing between the bottom edge between the two protrusions of the polarizer in the related art and the starting position of the glue-coated area of ​​the display panel.

[0060] In a specific example, Figure 5 As shown, the shape of the polarizer 504 needs to take into account the laser redundant width 505 of the display panel 502 and the polarizer 504 on the left and right sides of the COP. The lower edge of the polarizer in the related art is formed with two protrusions protruding from the lower edge of the polarizer, but the lower edge of the polarizer 504 in this example does not need to be formed with a protrusion protruding from the lower edge of the polarizer 504. In this example, the distance between the orthographic projection of the lower edge 511 of the polarizer 504 on the substrate unit 503 and the orthographic projection of the lower edge 512 of the first area 508 in the display panel 502 close to the second area 509 in the Y direction on the substrate unit 503 is the laser redundant width 505 of the display panel 502 and the polarizer 504.

[0061] In this example, the lower side edge of the polarizer protrudes by a laser redundant width 505 relative to the edge in the Y direction of the first area 508 close to the second area 509, thereby expanding the area of ​​adhesion between the lower side of the polarizer and the lower side of the display panel, so that the laser cutting route for simultaneously cutting the polarizer and the display panel can be extended to the lower side of the polarizer and the display panel.

[0062] Step S3: performing cutting, including cutting the display panel and the polarizer along a first cutting path respectively and cutting a second area of ​​the display panel along a second cutting path intersecting with the first cutting path;

[0063] In a specific example, the regular-shaped enlarged design of the polarizer allows the laser paths of the polarizer and the display panel (i.e., the first cutting path) to cover the lower end, and the L-shaped laser path of the display panel (i.e., the second cutting path) is to be at the bottom of the first cutting path, so that the display panel needs to have laser redundant width when the polarizer and the display panel are laser cut.

[0064] Furthermore, the smaller the lamination tolerance and laser tolerance of each company, the smaller the laser redundant width can be. When the polarizer and display panel are laser-cut, the laser redundant material with the minimum width of the low-end display panel can be used. After the display panel appearance is laser-cut, the polarizers at both ends of the COP Bending are cut evenly without step difference. The polarizer in the COP area is protruding, and the starting point of the bending area is moved downward.

[0065] In a specific example, Figure 6 It is a schematic diagram of cutting, taking the lower left part of the polarizer 504 as an example, the first cutting path includes the first section 601, the second section 602 and the third section 603; the first section 601 extends to the lower left part of the polarizer 504 along the extension direction of the side wall of the polarizer 504.

[0066] In another specific example, the first section 601 of the first cutting path extends from the lower end of the left side wall where the polarizer 504 and the display panel 502 are attached, along the upper, left and right side walls of the polarizer 504 and the display panel 502 to the lower end of the right side wall where the polarizer 504 and the display panel 502 are attached. By cutting the first section 601, it can be ensured that the upper, left and right edges of the polarizer 504 and the display panel 502 are flush without a step structure.

[0067] Furthermore, the second section 602 extends from the bottom end of the first section 601, that is, extends to one end of the lower left part of the polarizer 504 in a direction close to the first glue coating area 506. The second section 602 simultaneously cuts the lower side of the polarizer 504 and the display panel 502, so that the lower edge of the polarizer 504 and the lower edge of the display panel 502 are flush with each other without a step structure.

[0068] Furthermore, the third section 603 is formed by bending downward from one end of the second section 602 close to the first glue-coated area 506 toward a direction close to the first glue-coated area 506 .

[0069] In a specific example, Figure 6As shown, the distance between the second section 602 and the bottom edge of the lower edge of the polarizer 504 (i.e., the laser redundant width 505 of the display panel 502 and the polarizer 504) is greater than the cutting tolerance of the first cutting path. It is understandable that there is a certain design tolerance for laser cutting, such as ±0.05mm, or ±0.1mm. When the polarizer 604 and the display panel 602 are cut simultaneously along the first cutting path, it is necessary to ensure that the size of the portion to be cut in the lower part of the polarizer 504, that is, the distance between the second section 602 of the first cutting path and the bottom edge of the polarizer 504 is greater than the cutting tolerance of the first cutting path, so as to ensure that the polarizer 604 and the display panel 602 can be cut simultaneously along the first cutting path, so as to avoid the problem that when cutting to the lower part, only the display panel 602 is cut, thereby causing damage to the surface of the display panel 602.

[0070] This example can ensure that sufficient machining allowance is reserved for the lower part when cutting along the first cutting path, thereby eliminating possible errors and surface defects in the first cutting path; while ensuring that the consumption of materials, tools, electricity, etc. is low, waste is avoided, thereby improving the cutting quality and cutting efficiency.

[0071] In a specific embodiment, Figure 6 As shown, the second cutting path includes a fourth section 604 and a fifth section 605; the fourth section 604 extends along the boundary line between the first glued area 506 and the non-glued area; by cutting along the fourth section 604, the portion of the second area 509 of the display panel 602 except the first glued area 506 is cut off, thereby reducing the width of the display panel 602.

[0072] Further, such as Figure 6 As shown, the fifth section 605 is formed by bending one end of the fourth section 604 close to the lower left part in a direction away from the first glue coating area 506, and the fifth section 605 intersects with the third section 603 of the first cutting path.

[0073] Further, such as Figure 6 As shown, the fifth section 605 of the second cutting path is located at the lower end of the third section 603 of the first cutting path, and a certain distance may be left between the fifth section 605 and the bottom edge of the polarizer 504 to avoid the glue coating area. In a specific embodiment, the second cutting path is L-shaped.

[0074] It is understandable that the display panel 502 can be first cut along the second cutting path to expose the lower left portion of the polarizer 604; then the display panel 502 and the polarizer 504 can be cut simultaneously along the first cutting path; finally, the third section 603 of the first cutting path is made to intersect with the fifth section 604 of the second cutting path, thereby completing the outer shape cutting of the polarizer 504 and the display panel 502.

[0075] In this example, the first cutting path for simultaneously cutting the display panel and the polarizer can extend to the lower side of the display panel and the polarizer, so that the lower sides of the display panel and the polarizer can be uniformly cut, so that the lower edge of the display panel and the lower edge of the polarizer are flush, that is, there is no step structure, thereby solving the problem of the step structure formed between the edge of the polarizer and the edge of the display panel due to the different tolerances of the two laser cutting paths in the related technology, thereby ensuring that the edges of each side of the polarizer and the display panel are consistently flush, reducing the overall width of the frame of the display device, and improving the user experience; at the same time, the overall sealing of the display module is improved to meet the waterproof design requirements of the whole product.

[0076] Step S4: bending the second area of ​​the display panel to the back side, wherein the bending area is located within the glue-coated area.

[0077] In a specific example, Figure 7 The structure after cutting is shown, wherein a6 is a top view after cutting, and b6 is an enlarged schematic diagram of point D in a6. b6 shows the display panel 701 and polarizer 702 after laser cutting, the protruding length 703 of the polarizer 702 in the X direction, the protective glue 510 coated on the first glue coating area 506, and the distance 704 in the X direction that the protective glue covers beyond the starting point of the bending area.

[0078] In a specific example, Figure 7 As shown, the second area 509 of the display panel 701 is bent on the back of the display panel 701 to achieve COP packaging. Further, the bent area is located in the first glue coating area 506.

[0079] By providing a polarizer with a regular shape, this embodiment effectively reduces the production cost of the polarizer and simplifies the production process of the polarizer, compared with the related art in which the polarizer needs to be made with a special-shaped groove. At the same time, the edge of the polarizer can be made flush with the edge of the display panel without a step structure, thereby reducing the overall width of the frame of the display device and improving the user experience. It can also effectively improve the overall sealing of the display module and meet the waterproof design requirements of the entire product.

[0080] In a possible implementation, the distance between the segments at the two end positions of the first edge of the polarizer in the first cutting path corresponding to the first edge of the polarizer and the first edge of the polarizer is greater than the cutting tolerance of the first cutting path, and the first edge of the polarizer corresponds to the edge of the first area close to the second area.

[0081] In a specific example, Figure 5-Figure 6As shown, the distance between the segments at the two end positions of the first edge of the polarizer in the first cutting path (i.e., the second segment 602) and the first edge of the polarizer (i.e., the lower side 511 of the polarizer 504) (i.e., the laser redundant width 505 of the display panel 502 and the polarizer 504) is greater than the cutting tolerance of the first cutting path.

[0082] In this example, the lamination area between the lower side of the polarizer and the lower side of the display panel is enlarged, so that the laser cutting route for simultaneously cutting the polarizer and the display panel can be extended to the lower side of the polarizer and the display panel.

[0083] In a possible implementation, after the cutting and before the bending the second area of ​​the display panel to the back side, the method further includes: applying protective glue on the glue coating area.

[0084] In a specific example, Figure 7 As shown, the protective glue 510 is applied to the first glue coating area 506. Further, the glue coating area in this example only includes the first glue coating area 506, and the starting position of the protective glue 510 is the starting position of the first glue coating area 506, that is, the starting position of the protective glue 510 is the lower side 511 of the polarizer 504 attached to the lower surface of the display panel 502.

[0085] In a possible implementation, the aligning and bonding the polarizer to the display panel includes: coating a first adhesive layer on the polarizer, wherein a blank area not coated with the first adhesive layer is formed at an edge position of the polarizer corresponding to the first area and close to the second area; and aligning and bonding the polarizer to the display panel using the first adhesive layer.

[0086] In a specific example, Figure 8 FIG. 1 is a schematic diagram showing the structure of a polarizer in another embodiment. Figure 8 The polarizer 801 in the invention is not designed with a special shape, and the shape of the polarizer 801 is a regular shape, but the lower end of the polarizer 801 corresponding to the special-shaped area in the related art is made into a non-glue area, that is, a blank area 803, and the area of ​​the polarizer 801 except the blank area 803 is the first glue layer 802.

[0087] In a specific example, Figure 8 The polarizer shown in the figure is designed to exceed the COP Bending area when it is bonded to the display panel, and the excess width depends on the width of the laser redundancy at the left and right ends of the polarizer.

[0088] In this example, without moving the starting end of COP Bending and without affecting the lower boundary (Border), the polarizer and display panel edges on all four sides other than COP Bending are designed as an integrated whole.

[0089] In a specific example, Fig. 9 The figure shows a process flow diagram of the display module of the second embodiment, a9 is a structural diagram of the module, a9 shows the substrate unit 901, the display area 902, the display panel 903 and the protective glue 904 coated on the bending area of ​​the display panel; b9 is a structural diagram of the polarizer, showing the first glue layer 802 and the blank area 803; c9 is a structural diagram after the polarizer and the module are aligned and bonded; d9 is a structural diagram after removing the protective film 905 on the back of the bending area of ​​the display panel.

[0090] In this example, a blank area without glue is made at one end of the polarizer, and the polarizer and the display panel are laser-molded together to meet the COP Bending requirement and the sides of the polarizer and the display panel are designed as an integrated whole, while reducing costs.

[0091] In a specific example, Fig. 9 As shown, in this example, before the polarizer and the display panel are aligned and bonded, a protective glue 904 is first applied to the bending area of ​​the display panel, and then the polarizer is bonded. When bonding the polarizer, a groove can be designed on the platform of the substrate unit to avoid interference between the polarizer and the protective glue.

[0092] In a possible implementation manner, the protective adhesive is a photocurable adhesive.

[0093] In a specific example, Fig. 9 As shown, in order to completely cure the protective glue 904 so that the protective glue 904 does not stick to the polarizer after bonding, the curing process needs to be carried out in a nitrogen environment. Because the protective glue is a UV-curing glue, the photoinitiator used in the UV glue needs to generate free radicals under the action of ultraviolet rays, which in turn triggers a polymerization reaction and causes the UV glue to cure. During the curing process, oxygen in the air can combine with these free radicals to form stable compounds, thereby preventing further polymerization reactions. Therefore, in order to ensure that the UV glue can be effectively cured under ultraviolet rays, the curing process is usually carried out in a nitrogen environment.

[0094] This example can reduce the effect of oxygen on free radicals and accelerate the polymerization reaction, thereby achieving a fast and effective curing effect.

[0095] In a specific example, Fig.10 FIG. 1 is a schematic diagram of the structure after cutting in the second embodiment. Fig.10 After laser cutting, the polarizers and display panels at both ends of COP Bending are cut flush with each other without step difference; a10 is a top view of the design in which the polarizers and display panels at both ends of COPBending are cut flush with each other without step difference after laser cutting, and ah10 shows the display panel 1001 and the polarizer 1002 after laser cutting; b10 is an enlarged view of point E in a10. Fig.10 It includes a safety distance 1003 reserved between the upper boundary of the protective glue 1005 in the bending area of ​​the display panel and the upper boundary of the blank area of ​​the polarizer 1002, the protective glue 1005 in the bending area of ​​the display panel and the protective film area 1004 on the back of the bending area to be removed, the display area 1007, the first area 1008, the second area 1009, the first glue coating area 1010, the second glue coating area 1011 and the blank area 1012 in the polarizer 1002.

[0096] In a specific example, Fig.10 As shown, a safety distance 1003 needs to be reserved between the upper boundary of the blank area of ​​the polarizer 1002 and the upper boundary of the protective glue 1005 in the bending area of ​​the display panel to prevent the polarizer 1002 from sticking to the upper surface of the protective glue 1005 after the protective glue 1005 is applied.

[0097] Furthermore, the safety distance 1003 takes into account the polarizer lamination tolerance, the polarizer shape tolerance without glue, the polarizer shape tolerance, the polarizer and polarizer glue lamination tolerance, the protective glue flow tolerance, etc.

[0098] This example does not reduce the outer edge of the polarizer, so there is no need to consider the light leakage problem. Because the polarizer is fitted on the entire surface, it is completely feasible to consider the safety distance in the width of the glue-free area (i.e., the blank area). Finally, after the laser display panel is formed, the polarizers at both ends of the COP Bending are cut evenly without a step difference design. The polarizer in the COP area protrudes, but does not affect the starting position of the bending area, and does not affect the lower end boundary after bending.

[0099] In a specific example, Fig.10 and Figure 7 As shown, due to Fig.10 The starting position of the bending area in the image has not moved downward. Fig.10 The technical solution of the second embodiment overcomes the Figure 7 If the starting position of the bending area of ​​the display panel in the technical solution of the first embodiment moves downward, there will be a problem of loss of the lower boundary. The loss width is affected by two factors. The first factor is the width of the lower polarizer and the redundant width of the display panel laser. The second factor is that the protective glue covering the bending area of ​​the display panel exceeds the minimum width of the starting point of the bending area. According to the different laser precisions of each company, the smaller the precision, the smaller the affected width.

[0100] In a specific example, Fig.11 It is a schematic diagram of the structure after the second area of ​​the display panel is bent to the back side in the second embodiment, wherein a11 is a top view after the second area of ​​the display panel is bent to the back side; b11 is a side view of a11; c11 is an enlarged schematic diagram of point F in b11. Fig.11The display panel 1001 , the polarizer 1002 , the protective glue 1005 of the bending area of ​​the display panel, the removed protective film area 1004 on the back of the bending area, and the interference thickness 1006 of the polarizer 1002 and the protective glue 1005 are shown.

[0101] In a specific example, Fig.11 As shown, after the display panel 1001 is bent, the flow parts of the polarizer 1002 and the protective glue 1005 will interfere, that is, the interference thickness 1006 of the polarizer 1002 and the protective glue 1005, but the thickness of the protective glue 1005 is generally coated with 70μm±30μm, so the thickness of the flow area gradually decreases, and the interference points gradually decrease below 70μm, which has little effect on the bending area and will not cause defects such as cracks. This example is based on the different accuracy of the glue coating equipment of each company. The smaller the accuracy, the smaller the interference point.

[0102] In a possible implementation, before aligning and laminating the polarizer and the display panel, the method further includes: applying protective glue on the glue-coated area, the glue-coated area including a first glue-coated area arranged at an edge position of the second area close to the first area and a second glue-coated area arranged at an edge position of the first area close to the second area.

[0103] In a specific example, Fig.10 As shown, the glued area of ​​the display panel bending area protective glue 1005 includes a first glued area 1010 set at the edge position of the second area 1009 close to the first area 1008, and a second glued area 1011 set at the edge position of the first area 1008 close to the second area 1009.

[0104] Further, such as Fig.10 As shown, after the display panel 1001 and the polarizer 1002 are aligned and attached, the blank area 1012 is projected to cover the second glue-coated area 1011 , that is, a safety distance 1003 is reserved between the upper boundary of the second glue-coated area 1011 and the upper boundary of the blank area 1012 of the polarizer 1002 .

[0105] In this example, when the width of the glued area in the X direction remains unchanged, the blank area of ​​the polarizer covers the second glued area so that the width of the first glued area is reduced, which is equivalent to moving the glued area upward, thereby reducing the frame of the display panel.

[0106] In a possible implementation manner, in a first direction, the length of the second glue-coated area is smaller than the length of the blank area, and the first direction is a direction from the first area to the second area.

[0107] In a specific example, Fig.10As shown, in the first direction (ie, X direction), the length of the second glue-coated area 1011 is smaller than the length of the blank area 1012 , that is, a safety distance 1003 is reserved between the upper boundary of the second glue-coated area 1011 and the upper boundary of the blank area 1012 of the polarizer 1002 .

[0108] In this example, a safety distance 1003 is reserved between the upper boundary of the second glue-coated area 1011 and the upper boundary of the blank area 1012 of the polarizer 1002 to prevent the polarizer 1002 from sticking to the upper surface of the protective glue 1005 on the second glue-coated area 1011 after the protective glue 1005 is applied.

[0109] In a possible implementation, providing a polarizer includes: coating a first adhesive layer on a polarizer motherboard, the first adhesive layer including a plurality of hollow areas spaced apart along a row direction center line of the polarizer motherboard; cutting the polarizer motherboard, including performing row direction cutting along a row direction center line of the polarizer motherboard and performing multiple column direction cutting in gaps between adjacent hollow areas, to obtain a plurality of polarizers.

[0110] In a specific example, Fig.12 The figure shows a process flow diagram of providing a polarizer in the preparation method of the display module of the second embodiment, wherein a12 is a structural diagram of the polarizer motherboard; b12 is a structural diagram of the double-sided adhesive layer, b12 shows the double-sided adhesive area 1201 and the hollow area 1202; c12 is a structural diagram after the polarizer motherboard and the first adhesive layer are aligned and bonded; d12 is a schematic diagram of cutting along the center line 1204 of the row direction and multiple times in the column direction 1203 after the polarizer motherboard and the first adhesive layer are aligned and bonded; e12 is a structural diagram of the single polarizer after cutting, including the first adhesive layer 802 and the blank area 803.

[0111] In a specific example, Fig.12 As shown, the design of the blank area 803 of the non-glue area of ​​the polarizer is to form multiple hollow areas by punching holes in the double-sided adhesive of the polarizer, and then cut the polarizer and the double-sided adhesive layer after alignment and bonding to obtain multiple single polarizers. Furthermore, if there are too many layouts, the single polarizers can be placed up and down opposite to each other.

[0112] In a specific example, Fig.12 As shown, the hollow area 1202 forms a blank area 803 of two polarizers in the column direction.

[0113] In a possible implementation, before bending the second area of ​​the display panel to the back side, the method further includes: removing a back film of a third area of ​​the display panel, the third area corresponding to the orthographic projection of the bending area.

[0114] In a specific example, Figure 5As shown, the third area is the protective film area 507 on the back side of the bending area to be removed.

[0115] In a specific example, Figure 9-10 As shown, the third area is the protective film area 1004 on the back side of the bending area to be removed.

[0116] An embodiment of the present disclosure provides a display module prepared according to the method, comprising a display panel and a polarizer located on a light emitting surface of the display panel, wherein the display panel is an organic light emitting semiconductor display panel.

[0117] In a specific example, Fig.13 FIG. 1 is a schematic diagram of the structure of a display module prepared according to the method for preparing a display module provided in an embodiment of the present disclosure, wherein a13 is a top view of the display module; b13 is an enlarged schematic diagram of G in a13, Fig.13 The four edges of the display panel 1301 and the polarizer 1302 are consistent without any step difference.

[0118] The display module disclosed in the present invention is prepared according to the preparation method provided in the first embodiment or the preparation method provided in the second embodiment. Both solutions meet the requirements of COP Bending, in which the polarizers and display panel edges are integrated without short-difference without making the polarizer deformed.

[0119] By providing a polarizer with a regular shape, this embodiment effectively reduces the production cost of the polarizer and simplifies the production process of the polarizer, compared with the related art in which the polarizer needs to be made with a special-shaped groove. At the same time, the edge of the polarizer can be made flush with the edge of the display panel without a step structure, thereby reducing the overall width of the frame of the display device and improving the user experience. It can also effectively improve the overall sealing of the display module and meet the waterproof design requirements of the entire product.

[0120] Obviously, the above embodiments of the present disclosure are merely examples for clearly illustrating the present disclosure, and are not limitations on the implementation methods of the present disclosure. For ordinary technicians in this field, other different forms of changes or modifications can be made on the basis of the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present disclosure are still within the protection scope of the present disclosure.

Claims

1. A method for preparing a display module, characterized in that: The following steps are involved: A polarizer and a display panel are provided, wherein the shape of the polarizer is a regular shape; Aligning and laminating the polarizer with the display panel, wherein the display panel includes a first area covered by the polarizer and an exposed second area, and the glue-coated area of ​​the display panel includes a first glue-coated area disposed at an edge position of the second area close to the first area; Performing cutting, including cutting the display panel and the polarizer along a first cutting path respectively and cutting a second area of ​​the display panel along a second cutting path intersecting the first cutting path; The second area of ​​the display panel is bent to the back side, and the bent area is located in the glue-coated area.

2. The preparation method according to claim 1, characterized in that: The distance between the sections at the two end positions of the first edge of the polarizer in the first cutting path and the first edge of the polarizer is greater than the cutting tolerance of the first cutting path, and the first edge of the polarizer corresponds to the edge of the first area close to the second area.

3. The preparation method according to claim 1, characterized in that: After the cutting and before the bending of the second area of ​​the display panel to the back side, the method further includes: coating protective glue on the glue coating area.

4. The preparation method according to claim 1, characterized in that: The step of aligning and laminating the polarizer with the display panel comprises: coating a first adhesive layer on the polarizer, wherein a blank area not coated with the first adhesive layer is formed at an edge position of the polarizer corresponding to the first area and close to the second area; The polarizer is aligned and bonded to the display panel using the first adhesive layer.

5. The preparation method according to claim 4, characterized in that: Before aligning and laminating the polarizer and the display panel, the method further includes: applying protective glue on the glue-coated area, wherein the glue-coated area includes a first glue-coated area arranged at an edge position of the second area close to the first area and a second glue-coated area arranged at an edge position of the first area close to the second area.

6. The preparation method according to claim 5, characterized in that: In a first direction, the length of the second glue-coated area is smaller than the length of the blank area, and the first direction is a direction from the first area to the second area.

7. The preparation method according to claim 3 or 4, characterized in that: The protective adhesive is a light-curing adhesive.

8. The preparation method according to claim 4, characterized in that: Providing the polarizer includes: coating a first adhesive layer on a polarizer motherboard, wherein the first adhesive layer includes a plurality of hollow regions arranged at intervals along a center line of a row direction of the polarizer motherboard; The polarizer motherboard is cut, including row-direction cutting at the row-direction center line of the polarizer motherboard and multiple column-direction cutting at the gaps between adjacent hollow areas, to obtain a plurality of polarizers.

9. The method according to any one of claims 1 to 8, characterized in that Before bending the second area of ​​the display panel to the back side, the method further includes: removing a back film of a third area of ​​the display panel, the third area corresponding to the orthographic projection of the bending area.

10. A display module prepared by the method according to any one of claims 1 to 9, characterized in that: The invention comprises a display panel and a polarizer located on the light emitting surface of the display panel, wherein the display panel is an organic light emitting semiconductor display panel.

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