Display module, device and preparation method of display module

Abstract

The invention discloses a display module, a display device and a preparation method of the display module. The display module comprises a polarizing film layer, a colloid film layer and a display panel, the display panel comprises a bending area and a non-bending area, the polarizing film layer is arranged on the display side of the non-bending area, the display side of the display panel is coated with the colloid film layer, and the colloid film layer is connected with the boundary, close to the bending area, of the polarizing film layer. The contact boundary of the polarizing film layer and the colloid film layer comprises a sunken boundary with the sunken direction facing the first direction, and the distance between the sunken boundary and the display boundary of the display module meets the light leakage prevention display condition; the first direction is a direction deviating from the bending area. By adopting the display module, the siphonic effect at the contact boundary of the polarizing film layer and the colloid film layer can be reduced, the colloid thickness at the boundary is reduced, stress concentration in the bending area, especially the initial position of the bending area, is avoided, and the problems of bending cracks, bright lines and the like of the display module are avoided.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display module, a device, and a method for preparing the display module. Background Art

[0002] As display technology gradually develops, users have higher and higher requirements for the display effect of display panels, especially narrow-frame display. At present, display devices often use circuit area bending (pad bending) technology to bend the packaging area of ​​the display panel to the non-display surface of the display panel to reduce the frame width and achieve a narrow frame. In the circuit area bending technology, glue is applied to the panel bending area to reduce the stress on the panel bending area, protect the wiring in the bending area from damage, and prevent external water and oxygen from penetrating and corroding the bending area.

[0003] The polarizing film layer is an essential component of a liquid crystal display. It is located between the protective glass and the panel in the laminated structure of the display module, and the boundary section of the polarizing film layer is in contact with the glue coated on the bending area of ​​the panel.

[0004] Since the polarizing film layer and the polarizing film protective film have a certain thickness, the tension at the boundary cross-section of the polarizing film layer is relatively large, which leads to the accumulation of colloid at the boundary of the polarizing film layer, increases the stress in the bending area of ​​the panel, and makes the panel prone to bending cracks, bright lines and other problems, affecting the yield of the display device. Summary of the invention

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a display module, a device and a method for preparing a display module, which can reduce the siphon effect at the boundary where the polarizing film layer and the colloid film layer contact, reduce the thickness of the colloid at the boundary, avoid stress concentration in the bending area, especially at the starting position of the bending area, and avoid problems such as bending cracks and bright lines of the display module.

[0006] In a first aspect, the present application provides a display module. The display module includes a polarizing film layer, a colloid film layer and a display panel, the display panel includes a bending area and a non-bending area, the polarizing film layer is arranged on the display side of the non-bending area, the colloid film layer is coated on the display side of the display panel and is connected to the boundary of the polarizing film layer near the bending area, the boundary where the polarizing film layer contacts the colloid film layer includes a concave boundary with a concave direction facing a first direction, and the distance between the concave boundary and the display boundary of the display module meets the anti-light leakage display condition; the first direction is a direction away from the bending area.

[0007] In combination with the first aspect, in a possible implementation, the anti-light leakage display condition is that the minimum distance between the recessed boundary and the display boundary of the display module is greater than or equal to 220 micrometers.

[0008] In combination with the first aspect, in a possible implementation, the boundary where the polarizing film layer contacts the colloid film layer further includes a non-recessed boundary, and the recessed boundary and the non-recessed boundary are connected in the second direction; and the second direction intersects with the recessed direction of the recessed boundary.

[0009] In combination with the first aspect, in a possible implementation manner, the non-recessed boundary includes a first sub-boundary and a second sub-boundary, and in the second direction, the recessed boundary is located between the first sub-boundary and the second sub-boundary.

[0010] In combination with the first aspect, in a possible implementation manner, the first sub-boundary and the second sub-boundary have the same length in the second direction.

[0011] In combination with the first aspect, in a possible implementation manner, in the second direction, the length of the non-recessed boundary is related to the length of the polarizing film layer.

[0012] In combination with the first aspect, in a possible implementation manner, in the second direction, the length of the non-recessed boundary is greater than or equal to one quarter of the length of the polarizing film layer.

[0013] In combination with the first aspect, in a possible implementation manner, in a direction perpendicular to the second direction, the depth of the recessed boundary is related to a first distance; the first distance is the distance between a display boundary and a non-recessed boundary of the display module.

[0014] In combination with the first aspect, in a possible implementation manner, the depth of the recessed boundary is greater than or equal to one third of the first distance.

[0015] In combination with the first aspect, in a possible implementation, the recessed boundary includes a first recessed sub-boundary, a second recessed sub-boundary and a third recessed sub-boundary, the first recessed sub-boundary and the second recessed sub-boundary have the same length, the third recessed sub-boundary is parallel to the second direction, and the first recessed sub-boundary, the third recessed sub-boundary and the second recessed sub-boundary are connected in sequence to form a trapezoidal shape.

[0016] In combination with the first aspect, in a possible implementation manner, an angle between the first recessed sub-boundary and the non-recessed boundary is greater than or equal to 80°.

[0017] In combination with the first aspect, in a possible implementation manner, a connection between the first concave sub-boundary and the third concave sub-boundary is arc-shaped.

[0018] In combination with the first aspect, in a possible implementation manner, the radius of the arc is greater than or equal to 0.2 mm.

[0019] In combination with the first aspect, in a possible implementation method, the distance between the recessed boundary and the display boundary of the display panel is between the second distance and the third distance; the second distance is the distance between the recessed boundary and the display boundary of the display panel when there is a recessed boundary at the boundary where the polarizing film layer and the colloid film layer are in contact, and the colloid thickness at the starting position of the bending area of ​​the display panel is the maximum colloid thickness; the third distance is the distance between the boundary where the polarizing film layer and the colloid film layer are in contact and the display boundary of the display panel when there is no recessed boundary at the boundary where the polarizing film layer and the colloid film layer are in contact, and the colloid thickness at the starting position of the bending area of ​​the display panel is the maximum colloid thickness.

[0020] In a second aspect, the present application further provides a display device, which includes the display module as described in the first aspect and any one of the first aspects.

[0021] In a third aspect, the present application also provides a method for preparing a display module. The display module includes a polarizing film layer and a display panel, the display panel includes a bending area and a non-bending area, and the method includes: forming a polarizing film layer on the display side of the non-bending area of ​​the display panel; removing a portion of the polarizing film layer near the bending area, and forming a concave boundary at the boundary of the polarizing film layer near the bending area; the distance between the concave boundary and the display boundary of the display module meets the anti-light leakage display condition; forming a colloidal film layer on the remaining area on the same side of the display panel as the polarizing film layer.

[0022] The embodiments of the present application provide a display module, a device and a method for preparing the display module. The display module includes a polarizing film layer, a colloidal film layer and a display panel. The display panel includes a bending area and a non-bending area. The polarizing film layer is arranged on the display side of the non-bending area. The colloidal film layer is coated on the display side of the display panel and is connected to the boundary of the polarizing film layer near the bending area. The boundary where the polarizing film layer contacts the colloidal film layer includes a concave boundary with a concave direction toward a first direction. The distance between the concave boundary and the display boundary of the display module meets the anti-light leakage display condition. The first direction is the direction away from the bending area. The present application performs a special-shaped setting on the boundary of the polarizing film layer close to the colloid film layer, so that the boundary where the polarizing film layer contacts the colloid film layer has a depression with the depression direction away from the bending area, thereby increasing the contact area between the colloid film layer and the polarizing film layer, effectively reducing the siphon effect caused by the surface tension of the boundary cross section of the polarizing film layer, avoiding colloid accumulation, and achieving the effect of reducing the colloid thickness at the boundary, avoiding stress concentration in the bending area, especially at the starting position of the bending area, that is, avoiding bending cracks, bright lines and other problems of the display module. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 A schematic cross-sectional view showing the module border area; Figure 2 Schematic diagram of the siphon effect at the boundary of the polarizing film layer; Figure 3 It is a schematic diagram of the three-dimensional structure of the display module in the conventional solution; Figure 4 A schematic diagram of a three-dimensional structure of a display module in one embodiment; Figure 5 A schematic diagram showing a comparison between a frame structure of a display module in one embodiment and a conventional solution; Figure 6 A schematic diagram of the boundary shape of a polarizing film layer in one embodiment; Figure 7 is a schematic diagram of another boundary shape of a polarizing film layer in one embodiment; Figure 8 A schematic diagram of the three-dimensional structure of a polarizing film layer in an embodiment; Fig. 9 is a schematic diagram of another boundary shape of a polarizing film layer in one embodiment; Fig.10 Another schematic diagram comparing the frame structure of a display module in one embodiment with a conventional solution; Fig.11 Another schematic diagram comparing the frame structure of a display module in one embodiment with a conventional solution is shown. DETAILED DESCRIPTION

[0024] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0025] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. In addition, the term "and / or" herein is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The terms "first" and "second" in the description and claims of the embodiments of the present application are used to distinguish different objects, rather than to describe a specific order of objects.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] In the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] As display technology develops, users have higher and higher requirements for the display effect of display panels, especially narrow-frame displays. Figure 1 As shown, currently, display devices often use the circuit area bending (pad bending) technology to bend the packaging area of ​​the display panel to the non-display surface of the display panel to reduce the frame width and achieve a narrow frame. In the circuit area bending technology, glue is applied to the panel bending area to reduce the stress on the panel bending area, protect the wiring in the bending area from damage, and prevent the external water and oxygen from penetrating and corroding the bending area.

[0030] Among them, the polarizing film layer (POL) is an essential component of the liquid crystal display. It is located between the cover glass (CG) and the panel (PNL) in the stacked structure of the display module, and the boundary section of the polarizing film layer is in contact with the glue coated on the bending area of ​​the panel, such as modified cycloolefin (MCL). The side of the CG facing the POL is coated with ink to prevent the light emitted by the PNL from penetrating from the non-display area of ​​the display module.

[0031] Among them, Optically Clear Adhesive (OCA) is used to bond CG and POL, Back Film (BF) is attached to the non-display side of PNL, Super Clean Foam (SCF) plays a role in buffering and heat dissipation, and Bending Spacer is used to fix the bending part of PNL.

[0032] like Figure 1 In the border area shown, area ① is the area between the boundary of the active area (AA) and the boundary of the visual area (VA), area ② is the area between the boundary of the VA and the boundary of the POL, area ③ is the area between the boundary of the POL and the display boundary of the PNL, area ④ is the area between the boundary of the etched back film (EBB) and the bending start position of the display panel, ⑤ is the bending radius of the PNL, ⑥ is the thickness of the PNL, and ⑦ is the thickness of the colloid. Among them, the EBB boundary is also the display boundary of the display panel PNL.

[0033] It can be understood that the display boundary of the display module is the VA boundary, that is, the boundary between area ① and area ②, the display area of ​​the display module is AA and area ①, and the non-display area of ​​the display module is the area away from area ① from the VA boundary (that is, area ②, area ③, area ④, etc.); the display boundary of the display panel is the EBB boundary, that is, the boundary between area ③ and area ④. The boundary of the polarizer is located between the VA boundary and the EBB boundary. The ink coating area is the non-display area of ​​the display module.

[0034] like Figure 2 As shown, since the polarizing film layer and the polarizing film protective film (such as POL PF) have a certain thickness, the tension at the boundary section of the polarizing film layer is relatively large, thereby generating a siphon effect at the boundary section, causing colloid accumulation at the boundary of the polarizing film layer, starting from the edge of POL, forming a structure of climbing area, leveling area, and climbing area.

[0035] And as Figure 3As shown, the colloid at the bending starting position of the display panel is located in the climbing area at the edge of the POL. The colloid at the bending starting point is thicker and the stress is concentrated. The stress in the PNL bending area is larger, which makes the display panel prone to bending cracks, bright lines and other problems, affecting the yield of the display module.

[0036] In one embodiment, Figure 4 As shown, a display module is provided, which includes a polarizing film layer 10, a display panel 20 and a colloidal film layer 30. The display panel 20 includes a bending area 21 and a non-bending area 22. The polarizing film layer 10 is arranged on the display side of the non-bending area 22. The colloidal film layer 30 is coated on the display side of the display panel 20 and is connected to the boundary of the polarizing film layer 10 near the bending area. The boundary where the polarizing film layer 10 contacts the colloidal film layer 30 includes a concave boundary 11 with a concave direction toward a first direction. The distance between the concave boundary 11 and the display boundary of the display module meets the anti-light leakage display condition.

[0037] In the embodiment of the present application, the anti-light leakage display condition is that the distance between the recessed boundary 11 and the display boundary of the display module is sufficient to prevent the light emitted by the display panel from passing through the non-display area of ​​the display module. For example, the anti-light leakage display condition can be that the minimum distance between the recessed boundary 11 and the display boundary of the display module is greater than or equal to 220 microns.

[0038] In a possible implementation, to achieve a narrow frame, the minimum distance between the recessed boundary 11 and the display boundary of the display module is less than 250 microns. That is, the minimum distance between the recessed boundary 11 and the display boundary of the display module can be in the range of 220-250 microns, and the narrow frame of the display module is further achieved on the basis of preventing light leakage.

[0039] In the embodiment of the present application, when the display panel 20 of the display module includes a bending area 21 and a non-bending area 22, and when the bending area 21 of the display panel 20 is coated with glue to form a colloid film layer 30, in order to avoid the colloid accumulation of the colloid film layer 30 in the area close to the polarizing film layer 10, resulting in stress concentration in the bending area 21, cracks, bright lines and other problems, the boundary of the polarizing film layer 10 close to the colloid film layer 30 can be configured with a special shape, so that the boundary where the polarizing film layer 10 contacts the colloid film layer 30 has a concave shape. The concave boundary 11 is directed away from the bending region 21, so that the cross-sectional area of ​​the boundary where the polarizing film layer 10 contacts the colloid film layer 30 can be increased, that is, the contact area between the colloid film layer 30 and the polarizing film layer 10 is increased, and thus the siphon effect caused by the surface tension of the boundary cross section of the polarizing film layer 10 can be effectively reduced, thereby avoiding colloid accumulation, reducing the colloid thickness at the boundary, and avoiding stress concentration in the bending region 21, especially at the starting position of the bending region 21 (that is, the junction of the bending region 21 and the non-bending region 22).

[0040] like Figure 5 As shown, in the first embodiment, the non-bending region 22 of the frame structure includes the AA region boundary, the VA region boundary, the POL boundary, and the EBB in the direction toward the bending region 21, and there is a certain distance between each boundary. Among them, the POL boundary is a straight line and parallel to the other boundaries.

[0041] In the second embodiment, the concave boundary 11 of the polarizing film layer 10 can be set on the basis of the first embodiment, that is, the positions of the other boundaries except the POL boundary are kept unchanged, and the two ends of the boundary of the polarizing film layer 10 are extended in the direction toward the bending area 21, so as to form the concave boundary 11 of the polarizing film layer 10, which can avoid reducing the distance between the boundary of the polarizing film layer 10 and the display boundary of the display module, and ensure that the minimum distance between the concave boundary 11 and the display boundary of the display module meets the anti-light leakage display condition to avoid light leakage. The present application extends the two ends of the boundary of the polarizing film layer 10 in the direction toward the EBB boundary to form the concave boundary 11, avoids directly digging out part of the polarizing film layer 10 to form the concave boundary 11, ensures that the distance between the concave boundary 11 and the display boundary of the display module remains unchanged, increases the distance between the two ends of the boundary of the polarizing film layer 10 and the display boundary of the display module, and ensures the anti-light leakage effect of the display module.

[0042] In a possible implementation, after the boundary where the polarizing film layer 10 of the present application contacts the colloid film layer 30 forms a concave boundary 11, it can be Figure 5 The shape shown can also be Figure 6 As shown, the entire contact boundary between the polarizing film layer 10 and the colloid film layer 30 forms a recessed boundary 11 , and it is sufficient to ensure that the minimum distance between the recessed boundary 11 and the display boundary of the display module meets the anti-light leakage display condition.

[0043] The display module provided by the embodiment of the present application includes a polarizing film layer and a display panel, the display panel includes a bending area and a non-bending area, a polarizing film layer is arranged on the display side of the non-bending area, the remaining area on the display panel on the same side as the polarizing film layer is coated with a colloidal film layer, the boundary where the polarizing film layer contacts the colloidal film layer includes a concave boundary with a concave direction away from the bending area, and the minimum distance between the concave boundary and the display boundary of the display module meets the anti-light leakage display condition. The present application sets a special shape for the boundary of the polarizing film layer close to the colloidal film layer, so that the boundary where the polarizing film layer contacts the colloidal film layer has a concave direction away from the bending area, thereby increasing the contact area between the colloidal film layer and the polarizing film layer, effectively reducing the siphon effect caused by the surface tension of the boundary cross section of the polarizing film layer, avoiding colloid accumulation, achieving the effect of reducing the colloid thickness at the boundary, avoiding the bending area, especially the stress concentration at the starting position of the bending area, that is, avoiding the problems of bending cracks, bright lines, etc. of the display module.

[0044] In one embodiment, the boundary where the polarizing film layer 10 contacts the colloid film layer 30 further includes a non-recessed boundary 12 , and the recessed boundary 11 and the non-recessed boundary 12 are connected in the second direction.

[0045] The second direction intersects with the concave direction of the concave boundary.

[0046] When the recessed direction of the recessed boundary 11 is a direction perpendicular to the display boundary of the display module, the second direction may be a direction parallel to the display boundary of the display module.

[0047] In the embodiment of the present application, the boundary where the polarizing film layer 10 contacts the colloid film layer 30 is only partially recessed, which can increase the lamination area between the polarizing film layer 10 and the CG, that is, increase the overlapping area of ​​the ink on the polarizing film layer 10, avoid lamination bubbles, and avoid light leakage.

[0048] In a possible implementation, the concave boundary 11 may be as follows: Figure 4 As shown in FIG. 1 , the polarizing film layer 10 is located in the middle of the contact boundary between the polarizing film layer 10 and the colloid film layer 30. Figure 7 As shown, it is located at the end of the boundary where the polarizing film layer 10 and the colloid film layer 30 are in contact, and the present application does not impose any limitation on this.

[0049] In one embodiment, Figure 8 As shown, the non-recessed boundary 12 includes a first sub-boundary 121 and a second sub-boundary 122 , and in the second direction, the recessed boundary 11 is located between the first sub-boundary 121 and the second sub-boundary 122 .

[0050] In the embodiment of the present application, the recessed boundary 11 may be located in the middle of the boundary where the polarizing film layer 10 contacts the colloid film layer 30. That is, the non-recessed boundary 12 includes a first sub-boundary 121 and a second sub-boundary 122, and the first sub-boundary 121, the recessed boundary 11 and the second sub-boundary 122 are sequentially connected in the second direction. That is, the non-recessed boundary 12 is distributed at the end of the boundary where the polarizing film layer 10 contacts the colloid film layer 30, which can further prevent the light emitted by the display panel 20 from leaking from the two ends of the display module in the second direction, thereby improving the anti-light leakage effect of the display module.

[0051] In a possible implementation, the first sub-boundary 121 and the second sub-boundary 122 have the same length in the second direction.

[0052] In the display module provided in the embodiment of the present application, the boundary where the polarizing film layer and the colloidal film layer are in contact also includes a non-recessed boundary, that is, the boundary where the polarizing film layer and the colloidal film layer are in contact is only partially recessed, thereby increasing the bonding area between the polarizing film layer and the protective glass, that is, increasing the overlapping area of ​​the ink on the polarizing film layer, thereby avoiding the problem of bonding bubbles and light leakage, and ensuring the anti-light leakage effect of the display module.

[0053] The embodiment described above introduces a solution for preventing light leakage by ensuring the overlapping area of ​​ink on the polarizing film layer 10. In the embodiment of the present application, the relevant parameters of the boundary where the polarizing film layer 10 and the colloid film layer 30 contact each other can be limited to ensure the overlapping area of ​​ink on the polarizing film layer 10.

[0054] In one embodiment, the length of the non-recessed boundary 12 can be limited. In this embodiment, in the second direction, the length of the non-recessed boundary 12 is related to the length of the polarizing film layer 10 .

[0055] In the embodiment of the present application, the ink overlap area on the polarizing film layer 10 can be ensured by increasing the ratio of the length of the non-recessed boundary 12 in the second direction to the length of the polarizing film layer 10. For example, in the second direction, the length of the non-recessed boundary 12 is greater than or equal to one quarter of the length of the polarizing film layer.

[0056] like Fig. 9 As shown, when the non-recessed boundary 12 includes the first subboundary 121 and the second subboundary 122, the length l of the first subboundary 121 or the second subboundary 122 is greater than or equal to one eighth of the length of the polarizing film layer, that is, l≥L / 8.

[0057] In one embodiment, the depth of the recessed boundary 11 can be limited. In this embodiment, in a direction perpendicular to the second direction, the depth of the recessed boundary 11 is related to a first distance, which is the distance between the display boundary of the display module and the non-recessed boundary 12.

[0058] In the embodiment of the present application, the ink overlap area on the polarizing film layer 10 can be ensured by reducing the ratio of the depth of the concave boundary 11 to the first distance in the direction perpendicular to the second direction. For example, the depth h of the concave boundary 11 is greater than or equal to one third of the first distance H. That is, h≥H / 3.

[0059] In one embodiment, the recessed boundary 11 includes a first recessed sub-boundary 111, a second recessed sub-boundary 112 and a third recessed sub-boundary 113. The first recessed sub-boundary 111 and the second recessed sub-boundary 112 have the same length, the third recessed sub-boundary 113 is parallel to the second direction, and the first recessed sub-boundary 111, the third recessed sub-boundary 113 and the second recessed sub-boundary 112 are connected in sequence to form a trapezoidal shape.

[0060] In the present application embodiment, Fig. 9 As shown, the concave boundary 11 may be a trapezoidal shape composed of three sub-boundaries, wherein the first concave sub-boundary 111 is connected to the first sub-boundary 121 in the second direction, and the second concave sub-boundary 112 is connected to the second sub-boundary 122 in the second direction.

[0061] At this time, the ink overlap area on the polarizing film layer 10 can be ensured by increasing the angle between the first concave sub-boundary 111 and the first sub-boundary 121, or increasing the angle between the second concave sub-boundary 112 and the second sub-boundary 122. For example, the angle between the first concave sub-boundary 111 and the non-concave boundary 12 is greater than or equal to 80°. That is: A ≥ 80°.

[0062] In one embodiment, Fig. 9 As shown, the connection between the first concave sub-boundary 111 and the third concave sub-boundary 113 is arc-shaped. The arc-shaped connection can further reduce the siphon effect at the boundary where the polarizing film layer 10 and the colloid film layer 30 contact, that is, further reduce the colloid thickness at the boundary, and reduce the stress at the starting position of the bending area of ​​the display panel 20.

[0063] At this time, on the basis of limiting the length of the non-recessed boundary 12 in the second direction, the radius of the arc can be increased to ensure the ink overlap area on the polarizing film layer 10. For example, the radius R of the arc is greater than or equal to 0.2 mm, that is, R ≥ 0.2 mm.

[0064] The display module provided in the embodiment of the present application limits parameters such as the length of the non-recessed boundary in the second direction, the depth of the recessed boundary in the direction perpendicular to the second direction, the angle between the recessed boundary and the non-recessed boundary, and the arc radius at the connection of the recessed boundary in the boundary where the polarizing film layer contacts the colloid film layer, so as to ensure the overlapping area of ​​the ink on the polarizing film layer, avoid the problem of bubbles in the bonding between the polarizing film layer and the protective glass, avoid the problem of light leakage, and ensure the anti-light leakage effect of the display module.

[0065] like Fig.10 As shown, in Example 2, the thickness of the colloid film layer at the starting position of the display panel bending has been effectively reduced by the concave boundary of the polarizing film layer. Therefore, in Example 3, on the basis of Example 2, the EBB boundary can be moved toward the boundary of the polarizing film layer to shorten the maximum distance between the EBB boundary and the polarizing film layer to achieve a narrow frame. However, in the process of the EBB moving toward the boundary of the polarizing film layer, the thickness of the colloid film layer at the starting position of the display panel bending increases, resulting in an increase in the stress at the starting position of the display panel bending. Therefore, until the maximum distance between the EBB boundary and the polarizing film layer is shortened from M to m, at which time the thickness of the colloid film layer at the starting position of the display panel bending reaches the maximum colloid thickness, the stress at the starting position of the display panel bending also reaches the maximum stress, and the EBB boundary is stopped from moving.

[0066] In one embodiment, Fig.10 and Fig.11 As shown, the distance between the recessed boundary 11 and the display boundary of the display panel is between the second distance m and the third distance M.

[0067] The second distance m is the distance between the concave boundary 11 and the display boundary of the display panel 20 when there is a concave boundary 11 at the boundary where the polarizing film layer 10 and the colloid film layer 30 contact each other and the colloid thickness at the starting position of the bending region 21 of the display panel 20 is the maximum colloid thickness; The third distance M is the distance between the boundary where the polarizing film layer 10 and the colloid film layer 30 contact and the display boundary of the display panel 20 when there is no concave boundary 11 at the boundary where the polarizing film layer 10 and the colloid film layer 30 contact, and the colloid thickness at the starting position of the bending area 21 of the display panel 20 is the maximum colloid thickness.

[0068] In the embodiment of the present application, when there is no concave boundary 11 at the boundary where the polarizing film layer 10 contacts the colloid film layer 30, the colloid thickness at the starting position of the bending region 21 of the display panel 20 is large, the stress is large, and bending cracks are easily generated. At this time, it is necessary to ensure that the distance between the boundary where the polarizing film layer 10 contacts the colloid film layer 30 and the EBB boundary is large enough to ensure that the colloid thickness at the starting position of the bending region 21 is within the maximum colloid thickness range that the starting position of the bending region 21 can withstand.

[0069] That is, when there is no concave boundary 11 at the boundary where the polarizing film layer 10 contacts the colloid film layer 30 and the colloid thickness at the starting position of the bending area 21 of the display panel 20 is the maximum colloid thickness T, the distance between the boundary where the polarizing film layer 10 contacts the colloid film layer 30 and the EBB boundary is the third distance M.

[0070] In the case where there is a concave boundary 11 at the boundary where the polarizing film layer 10 contacts the colloid film layer 30, since the colloid thickness at the starting position of the bending region 21 is reduced to t, the distance between the concave boundary 11 and the EBB boundary can be reduced to further realize the narrow frame of the display module. In the process of reducing the distance between the concave boundary 11 and the EBB boundary, the colloid thickness at the starting position of the bending region 21 gradually increases until the maximum colloid thickness is reached, and the distance between the concave boundary 11 and the EBB boundary is the second distance m.

[0071] It can be understood that when there is a recessed boundary 11 at the boundary where the polarizing film layer 10 and the colloid film layer 30 contact each other, in order to further achieve a narrow frame, the distance between the recessed boundary 11 and the EBB boundary should be within the range of the second distance and the third distance.

[0072] In the display module provided by the embodiment of the present application, when there is a concave boundary at the boundary where the polarizing film layer contacts the colloid film layer, the distance between the concave boundary and the EBB boundary can be reduced, that is, on the basis of reducing the colloid thickness at the starting position of the bending area, a narrow frame can be further achieved.

[0073] In one embodiment, a display device is provided, which includes a display module as described in the above embodiment. The display module includes a polarizing film layer 10 and a display panel 20, the display panel 20 includes a bending area 21 and a non-bending area 22, the display side of the non-bending area 22 is provided with a polarizing film layer 10, and the remaining area on the same side of the display panel 20 as the polarizing film layer 10 is coated with a colloid film layer 30, and the boundary where the polarizing film layer 10 contacts the colloid film layer 30 includes a concave boundary 11 whose concave direction is away from the bending area 21, and the minimum distance between the concave boundary 11 and the display boundary of the display module meets the anti-light leakage display condition.

[0074] In the embodiment of the present application, the anti-light leakage display condition is that the minimum distance between the recessed boundary 11 and the display boundary of the display module is sufficient to prevent the light emitted by the display panel from passing through the non-display area of ​​the display module. For example, the anti-light leakage display condition can be that the minimum distance between the recessed boundary 11 and the display boundary of the display module is greater than or equal to 220 microns.

[0075] In a possible implementation, to achieve a narrow frame, the minimum distance between the recessed boundary 11 and the display boundary of the display module is less than 250 microns. That is, the minimum distance between the recessed boundary 11 and the display boundary of the display module can be in the range of 220-250 microns, and the narrow frame of the display module is further achieved on the basis of preventing light leakage.

[0076] In the embodiment of the present application, when the display panel 20 of the display module includes a bending area 21 and a non-bending area 22, and when the bending area 21 of the display panel 20 is coated with glue to form a colloid film layer 30, in order to avoid the colloid accumulation of the colloid film layer 30 in the area close to the polarizing film layer 10, resulting in stress concentration in the bending area 21, cracks, bright lines and other problems, the boundary of the polarizing film layer 10 close to the colloid film layer 30 can be configured with a special shape, so that the boundary where the polarizing film layer 10 contacts the colloid film layer 30 has a concave shape. The concave boundary 11 is directed away from the bending region 21, so that the cross-sectional area of ​​the boundary where the polarizing film layer 10 contacts the colloid film layer 30 can be increased, that is, the contact area between the colloid film layer 30 and the polarizing film layer 10 is increased, and thus the siphon effect caused by the surface tension of the boundary cross section of the polarizing film layer 10 can be effectively reduced, thereby avoiding colloid accumulation, reducing the colloid thickness at the boundary, and avoiding stress concentration in the bending region 21, especially at the starting position of the bending region 21 (that is, the junction of the bending region 21 and the non-bending region 22).

[0077] It should be noted that when the concave boundary 11 of the polarizing film layer 10 is set based on the conventional frame structure, the concave boundary 11 can be formed by extending the two ends of the boundary of the polarizing film layer 10 in the direction toward the bending area 21 to ensure that the minimum distance between the concave boundary 11 and the display boundary of the display module meets the anti-light leakage display condition to avoid light leakage. Figure 5 As shown, there is a front view comparison and a cross-sectional comparison diagram of a conventional solution and the solution of the present application (improved solution). The present application extends the two ends of the boundary of the polarizing film layer 10 in the direction toward the EBB boundary to form a recessed boundary 11, thereby avoiding directly digging out part of the polarizing film layer 10 to form the recessed boundary 11, ensuring that the minimum distance between the recessed boundary 11 and the display boundary of the display module remains unchanged, increasing the distance between the two ends of the boundary of the polarizing film layer 10 and the display boundary of the display module, and ensuring the anti-light leakage effect of the display module.

[0078] In a possible implementation, after the boundary where the polarizing film layer 10 of the present application contacts the colloid film layer 30 forms a concave boundary 11, it can be Figure 5 The shape shown can also be Figure 6 As shown, the entire contact boundary between the polarizing film layer 10 and the colloid film layer 30 forms a recessed boundary 11 , and it is sufficient to ensure that the minimum distance between the recessed boundary 11 and the display boundary of the display module meets the anti-light leakage display condition.

[0079] The display device provided by the embodiment of the present application includes a display module, the display module includes a polarizing film layer and a display panel, the display panel includes a bending area and a non-bending area, a polarizing film layer is arranged on the display side of the non-bending area, the remaining area on the display panel on the same side as the polarizing film layer is coated with a colloid film layer, the boundary where the polarizing film layer contacts the colloid film layer includes a concave boundary with a concave direction away from the bending area, and the minimum distance between the concave boundary and the display boundary of the display module meets the anti-light leakage display condition. The present application sets a special shape for the boundary of the polarizing film layer close to the colloid film layer, so that the boundary where the polarizing film layer contacts the colloid film layer has a concave direction away from the bending area, thereby increasing the contact area between the colloid film layer and the polarizing film layer, effectively reducing the siphon effect caused by the surface tension of the boundary cross section of the polarizing film layer, avoiding colloid accumulation, achieving the effect of reducing the colloid thickness at the boundary, avoiding the bending area, especially the stress concentration at the starting position of the bending area, that is, avoiding the problems of bending cracks and bright lines of the display module, and improving the display effect of the display device.

[0080] In one embodiment, a method for preparing a display module is provided, wherein the display module includes a polarizing film layer 10 and a display panel 20, wherein the display panel 20 includes a bending region 21 and a non-bending region 22; the method for preparing the display module includes: forming a polarizing film layer 10 on a display side of the non-bending region 22 of the display panel 20; removing a portion of the polarizing film layer 10 close to the bending region 21, and forming a recessed boundary 11 at a boundary of the polarizing film layer 10 close to the bending region 21; and forming a colloidal film layer 30 on the remaining region of the display panel 20 on the same side as the polarizing film layer 10.

[0081] The minimum distance between the recessed boundary 11 and the display boundary of the display module satisfies the light leakage prevention display condition.

[0082] The anti-light leakage display condition is that the minimum distance between the recessed boundary 11 and the display boundary of the display module is sufficient to prevent the light emitted by the display panel from leaking out of the non-display area of ​​the display module. For example, the anti-light leakage display condition can be that the minimum distance between the recessed boundary 11 and the display boundary of the display module is greater than or equal to 220 microns.

[0083] In the embodiment of the present application, when preparing the display module, a rectangular polarizing film layer 10 is first formed on the display side of the non-bending area 22 of the display panel 20, and then a portion of the polarizing film layer 10 near the bending area 21 is removed to form a recessed boundary 11 at the boundary of the polarizing film layer 10 near the bending area 21. When removing a portion of the polarizing film layer 10 near the bending area 21, it is necessary to ensure that the minimum distance between the recessed boundary 11 and the display boundary of the display module meets the anti-light leakage display condition. For example, ensure that the minimum distance between the recessed boundary 11 and the display boundary of the display module is greater than or equal to 220 microns. Finally, a colloid is coated on the remaining area on the same side of the display panel 20 as the polarizing film layer 10 to form a colloid film layer 30. At this time, there is a concave boundary 11 at the contact boundary between the polarizing film layer 10 and the colloid film layer 30, which increases the contact area between the colloid film layer 30 and the polarizing film layer 10, effectively reduces the siphon effect, and reduces the colloid thickness at the starting position of the bending area 21, thereby effectively avoiding bending cracks, bright lines and other problems.

[0084] The display module preparation method provided in the embodiment of the present application forms a polarizing film layer, so that a concave boundary exists at the boundary where the polarizing film layer contacts the colloid film layer, thereby increasing the contact area between the colloid film layer and the polarizing film layer, effectively reducing the siphon effect caused by the surface tension of the boundary cross section of the polarizing film layer, avoiding colloid accumulation, and achieving the effect of reducing the colloid thickness at the boundary, avoiding the bending area, especially the stress concentration at the starting position of the bending area, that is, avoiding the problems of bending cracks, bright lines and the like of the display module.

[0085] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A display module, characterized in that: The display module includes a polarizing film layer, a colloid film layer and a display panel, wherein the display panel includes a bending region and a non-bending region, the polarizing film layer is arranged on the display side of the non-bending region, the colloid film layer is coated on the display side of the display panel and is in contact with the boundary of the polarizing film layer near the bending region, The boundary where the polarizing film layer contacts the colloid film layer includes a concave boundary with a concave direction toward the first direction, and the distance between the concave boundary and the display boundary of the display module meets the anti-light leakage display condition; The first direction is a direction away from the bending area.

2. The display module according to claim 1, characterized in that: The anti-light leakage display condition is that the minimum distance between the recessed boundary and the display boundary of the display module is greater than or equal to 220 micrometers.

3. The display module according to claim 1, characterized in that: The boundary where the polarizing film layer contacts the colloid film layer further includes a non-recessed boundary, and the recessed boundary and the non-recessed boundary are connected in a second direction; and the second direction intersects with the first direction.

4. The display module according to claim 3, characterized in that: The non-recessed boundary includes a first sub-boundary and a second sub-boundary, In the second direction, the recessed boundary is located between the first sub-boundary and the second sub-boundary.

5. The display module according to claim 4, characterized in that: The first sub-boundary and the second sub-boundary have the same length in the second direction.

6. The display module according to claim 3, characterized in that: In the second direction, the length of the non-recessed boundary is related to the length of the polarizing film layer; the length of the non-recessed boundary is greater than or equal to one quarter of the length of the polarizing film layer.

7. The display module according to claim 3, characterized in that: In a direction perpendicular to the second direction, the depth of the recessed boundary is related to a first distance; the first distance is the distance between the display boundary of the display module and the non-recessed boundary.

8. The display module according to claim 7, characterized in that: The depth of the recessed boundary is greater than or equal to one third of the first distance.

9. The display module according to claim 3, characterized in that: The concave boundary includes a first concave sub-boundary, a second concave sub-boundary and a third concave sub-boundary, the first concave sub-boundary and the second concave sub-boundary have the same length, and the third concave sub-boundary is parallel to the second direction. The first concave sub-boundary, the third concave sub-boundary and the second concave sub-boundary are connected in sequence to form a trapezoidal shape.

10. The display module according to claim 9, characterized in that: An angle between the first concave sub-boundary and the non-concave boundary is greater than or equal to 80°.

11. The display module according to claim 9, characterized in that: The connection between the first concave sub-boundary and the third concave sub-boundary is in an arc shape.

12. The display module according to claim 11, characterized in that: The radius of the arc is greater than or equal to 0.2 mm.

13. The display module according to claim 3, characterized in that: The distance between the recessed boundary and the display boundary of the display panel is between the second distance and the third distance; the second distance is the distance between the recessed boundary and the display boundary of the display panel when the recessed boundary exists at the boundary where the polarizing film layer and the colloid film layer are in contact, and the colloid thickness at the starting position of the bending area of ​​the display panel is the maximum colloid thickness; the third distance is the distance between the boundary where the polarizing film layer and the colloid film layer are in contact and the display boundary of the display panel when the recessed boundary does not exist at the boundary where the polarizing film layer and the colloid film layer are in contact, and the colloid thickness at the starting position of the bending area of ​​the display panel is the maximum colloid thickness.

14. A display device, characterized in that: The display device comprises a display module as described in any one of claims 1-13.

15. A method for preparing a display module, characterized in that: The display module includes a polarizing film layer and a display panel, the display panel includes a bending area and a non-bending area, and the method includes: Forming the polarizing film layer on the display side of the non-bending area of ​​the display panel; A partial area of ​​the polarizing film layer near the bending area is removed to form a concave boundary at the boundary of the polarizing film layer near the bending area; the distance between the concave boundary and the display boundary of the display module meets the light leakage prevention display condition; A colloid film layer is formed on the remaining area of ​​the display panel on the same side as the polarizing film layer.

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