Display module, device and preparation method of display module

Abstract

The application discloses a display module, a device and a preparation method of the display module. The display module comprises a polarizing film layer, a gel 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 gel film layer is coated on the display side of the display panel and is connected to the boundary of the polarizing film layer close to the bending area. The boundary of the polarizing film layer in contact with the gel film layer comprises a concave boundary with a concave direction towards a first direction. The distance between the concave boundary and the display boundary of the display module satisfies the anti-leakage display condition. The first direction is a direction away from the bending area. The display module can reduce the siphon effect at the boundary of the polarizing film layer in contact with the gel film layer, reduce the thickness of the gel at the boundary, avoid stress concentration at 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.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a display module, a device and a preparation method of the display module. BACKGROUND

[0002] With the gradual development of display technology, users have higher and higher requirements for the display effect of display panels, especially narrow-frame display. At present, display devices often use a 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 narrow-frame display. In the pad bending technology, glue is applied to the bending area of the panel to reduce the stress on the bending area of the panel, protect the traces in the bending area from being easily damaged, and prevent external water and oxygen from penetrating and corroding the bending area.

[0003] The polarizing film layer is a necessary component of a liquid crystal display and is located between the protective glass and the panel in the stacked structure of the display module. The boundary section of the polarizing film layer is in contact with the glue applied to the bending area of the panel.

[0004] Since the polarizing film layer and the protective film of the polarizing film layer have a certain thickness, the tension at the boundary section of the polarizing film layer is large, which causes the glue to accumulate at the boundary of the polarizing film layer, increases the stress on the bending area of the panel, and further causes the panel to easily have bending cracks, bright lines and other problems, affecting the yield of the display device. SUMMARY

[0005] In view of the above-mentioned defects or shortcomings in the prior art, it is desirable to provide a display module, a device and a preparation method of the display module, which can reduce the siphon effect at the boundary where the polarizing film layer and the glue film layer are in contact, reduce the thickness of the glue at the boundary, avoid stress concentration at the starting position of the bending area, and avoid bending cracks, bright lines and other problems 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 glue 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 glue film layer is coated on the display side of the display panel and is in contact with the boundary of the polarizing film layer close to the bending area. The boundary where the polarizing film layer and the glue film layer are in contact includes a concave boundary with a concave direction towards a first direction. The distance between the concave boundary and the display boundary of the display module satisfies a light leakage prevention display condition. The first direction is a direction away from the bending area.

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

[0008] With reference to the first aspect, in a possible implementation manner, the boundary where the polarized film layer contacts the gel film layer further comprises a non-recessed boundary, and the recessed boundary and the non-recessed boundary are connected in the second direction; the second direction intersects with a recessed direction of the recessed boundary.

[0009] With reference to the first aspect, in a possible implementation manner, the non-recessed boundary comprises 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] With reference to 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] With reference to 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 polarized film layer.

[0012] With reference to 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 fourth of the length of the polarized film layer.

[0013] With reference to 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 a distance between a display boundary of the display module and the non-recessed boundary.

[0014] With reference to 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] With reference to the first aspect, in a possible implementation manner, the recessed boundary comprises 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 sequentially connected to form a trapezoidal shape.

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

[0017] With reference to the first aspect, in a possible implementation manner, a connection between the first recessed sub-boundary and the third recessed sub-boundary is arc-shaped.

[0018] With reference to the first aspect, in a possible implementation manner, a radius of the arc-shaped connection is greater than or equal to 0.2 millimeters.

[0019] In a possible implementation manner of the first aspect, a distance between the recess boundary and a display boundary of the display panel is between a second distance and a third distance; the second distance is a distance between the recess boundary and the display boundary of the display panel when a boundary where the polarized film layer contacts the gel film layer has the recess boundary and a gel thickness at a starting position of the bending area of the display panel is the maximum gel thickness; and the third distance is a distance between the boundary where the polarized film layer contacts the gel film layer and the display boundary of the display panel when the boundary where the polarized film layer contacts the gel film layer does not have the recess boundary and the gel thickness at the starting position of the bending area of the display panel is the maximum gel thickness.

[0020] In the second aspect, the present application further provides a display device. The display device includes the display module according to the first aspect and any one of the implementation manners of the first aspect.

[0021] In the third aspect, the present application further provides a preparation method of a display module. The display module includes a polarized film layer and a display panel, and the display panel includes a bending area and a non-bending area. The method includes: forming the polarized film layer on a display side of the non-bending area of the display panel; removing a part of the polarized film layer close to the bending area to form a recess boundary on a boundary of the polarized film layer close to the bending area; a distance between the recess boundary and a display boundary of the display module satisfies a light leakage prevention display condition; and forming a gel film layer on a remaining area on the same side of the display panel as the polarized film layer.

[0022] The display module, the device and the preparation method of the display module provided in the embodiments of the present application include a polarized film layer, a gel film layer and a display panel, the display panel includes a bending area and a non-bending area, the polarized film layer is arranged on a display side of the non-bending area, the gel film layer is coated on the display side of the display panel and is connected to a boundary of the polarized film layer close to the bending area, a boundary where the polarized film layer contacts the gel film layer includes a recess boundary with a recess direction towards a first direction, and a distance between the recess boundary and a display boundary of the display module satisfies a light leakage prevention display condition; and the first direction is a direction away from the bending area. The polarized film layer is specially arranged at the boundary close to the gel film layer, so that the boundary where the polarized film layer contacts the gel film layer has a recess with a recess direction away from the bending area, thereby increasing a contact area of the gel film layer and the polarized film layer, effectively reducing a siphon effect caused by surface tension of a cross section of the boundary of the polarized film layer, avoiding gel accumulation, reducing a gel thickness at the boundary, avoiding stress concentration at the starting position of the bending area, and avoiding problems such as bending cracks and bright lines of the display module. BRIEF DESCRIPTION OF DRAWINGS

[0023] Other characteristics, objectives and advantages of the present application will become more apparent from the following detailed description of non-restrictive embodiments, made with reference to the accompanying drawings:

[0024] Figure 1 A cross-sectional view of the frame region of the display module is shown in FIG. 1.

[0025] Figure 2 A schematic view of the siphon effect at the boundary of the polarizing film layer is shown in FIG. 2.

[0026] Figure 3 A schematic view of the display module in a conventional scheme is shown in FIG. 3.

[0027] Figure 4 A schematic view of the display module in an embodiment is shown in FIG. 4.

[0028] Figure 5 A schematic view of the frame structure of the display module in an embodiment compared with the conventional scheme is shown in FIG. 5.

[0029] Figure 6 A schematic view of the boundary shape of the polarizing film layer in an embodiment is shown in FIG. 6.

[0030] Figure 7 Another schematic view of the boundary shape of the polarizing film layer in an embodiment is shown in FIG. 7.

[0031] Figure 8 A schematic view of the display module in an embodiment is shown in FIG. 8.

[0032] Figure 9 Another schematic view of the boundary shape of the polarizing film layer in an embodiment is shown in FIG. 9.

[0033] Figure 10 Another schematic view of the frame structure of the display module in an embodiment compared with the conventional scheme is shown in FIG. 10.

[0034] Figure 11 Another schematic view of the frame structure of the display module in an embodiment compared with the conventional scheme is shown in FIG. 11. DETAILED DESCRIPTION

[0035] The application will be further described below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are intended to be merely illustrative of the application and not in limitation thereof. It should also be noted that, for the purpose of clarity, only the parts of the drawings that are pertinent to the application are shown.

[0036] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments. In addition, the term "and / or" in this paper is only to describe the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can represent the existence of A alone, the existence of A and B together, and the existence of B alone. The terms "first" and "second" in the specification and claims of the embodiments of the present application are used to distinguish different objects, not to describe the specific order of the objects.

[0037] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0038] In the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0040] With the gradual development of display technology, users have higher and higher requirements for the display effect of display panels, especially narrow frame display. Figure 1As shown, at present, the display device often adopts a 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 traces in the bending area from being damaged, and prevent external water and oxygen from penetrating and corroding the bending area.

[0041] The polarizing film layer (POL) is a necessary component of the liquid crystal display and is located between the cover glass (CG) and the panel (PNL) in the layer structure of the display module. The boundary section of the polarizing film layer is in contact with the glue, such as modified cycloolefin (MCL), applied to the panel bending area. The side of the CG facing the POL is coated with ink to prevent the light emitted by the PNL from being transmitted from the non-display area of the display module.

[0042] The optically clear adhesive (OCA) is used to bond the CG and the POL. The back film (BF) is attached to the non-display side of the PNL. The super clean foam (SCF) functions as a buffer and a heat sink. The bending spacer is used to fix the bending part of the PNL.

[0043] As shown in the frame area, Figure 1 Region ① is the area between the active area (AA) boundary and the visual area (VA) boundary, region ② is the area between the VA boundary and the POL boundary, region ③ is the area between the POL boundary and the display boundary of the PNL, region ④ is the area between the etch bending B (EBB) boundary 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 glue. The EBB boundary is also the display boundary of the display panel PNL.

[0044] As can be understood, the display boundary of the display module is the VA boundary, i.e., the junction of region ① and region ②. The display area of the display module is AA and region ①. The non-display area of the display module is the area away from region ① (i.e., region ②, region ③, region ④, etc.) from the VA boundary. The display boundary of the display panel is the EBB boundary, i.e., the junction of region ③ and region ④. The boundary of the polarizing sheet is located between the VA boundary and the EBB boundary. The ink coating area is the non-display area of the display module.

[0045] As shown in the frame area, Figure 2As shown, because the polarizing film layer and the polarizing film layer protective film (for example, POL PF) have a certain thickness, the tension at the boundary cross section of the polarizing film layer is large, thereby generating a siphon effect at the boundary cross section, causing the glue to accumulate at the boundary of the polarizing film layer, and forming a structure of a climbing region, a leveling region, and a climbing region from the edge of the POL.

[0046] As shown, the glue at the bending starting position of the display panel is located in the climbing region at the edge of the POL, the glue at the bending starting position is thick, stress is concentrated, the stress in the bending area of the PNL is large, and the display panel is prone to bending cracks, bright lines and other problems, thereby affecting the yield of the display module. Figure 3 In one embodiment, as shown, a display module is provided, which includes a polarizing film layer 10, a display panel 20, and a glue 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 glue film layer 30 is coated on the display side of the display panel 20 and is in contact with the boundary of the polarizing film layer 10 close to the bending area. The boundary where the polarizing film layer 10 contacts the glue film layer 30 includes a recessed boundary 11 with a recessed direction towards a first direction. The distance between the recessed boundary 11 and the display boundary of the display module satisfies a light leakage prevention display condition.

[0047] Figure 4 In the embodiments of the present application, the light leakage prevention 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 leaking out from the non-display area of the display module. For example, the light leakage prevention 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.

[0048] 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, which further realizes a narrow frame of the display module on the basis of preventing light leakage.

[0049]

[0050] ​​In the embodiments of the present application, the display panel 20 of the display module includes a bending area 21 and a non-bending area 22, and in the case where the glue film layer 30 is coated on the bending area 21 of the display panel 20, in order to avoid the stress concentration of the bending area 21 caused by the glue accumulation in the area close to the polarized film layer 10, the crack, the bright line and other problems, the boundary of the polarized film layer 10 close to the glue film layer 30 can be specially shaped, so that the boundary of the polarized film layer 10 in contact with the glue film layer 30 has a recessed boundary 11 with a recessed direction away from the bending area 21, thereby increasing the cross-sectional area of the boundary of the polarized film layer 10 in contact with the glue film layer 30, i.e., increasing the contact area between the glue film layer 30 and the polarized film layer 10, and further effectively reducing the siphon effect caused by the surface tension of the boundary section of the polarized film layer 10, avoiding glue accumulation, and achieving the effect of reducing the glue thickness at the boundary and avoiding stress concentration at the bending area 21, especially at the starting position of the bending area 21 (i.e., the junction of the bending area 21 and the non-bending area 22).

[0051] As shown in Figure 5 , in embodiment one, in the non-bending area 22 of the frame structure, in the direction towards the bending area 21, there are AA area boundary, VA area boundary, POL boundary and EBB in sequence, and each boundary has a certain distance.

[0052] In embodiment two, the recessed boundary 11 of the polarized film layer 10 can be set on the basis of embodiment one, i.e., the positions of the boundaries except the POL boundary remain unchanged, and in the direction towards the bending area 21, the two ends of the boundary of the polarized film layer 10 are extended, thereby forming the recessed boundary 11 of the polarized film layer 10, which can avoid reducing the distance between the boundary of the polarized film layer 10 and the display boundary of the display module, 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, and avoid light leakage. The present application extends the two ends of the boundary of the polarized film layer 10 in the direction towards the EBB boundary to form the recessed boundary 11, avoids directly digging part of the polarized film layer 10 to form the recessed boundary 11, ensures that the distance between the recessed boundary 11 and the display boundary of the display module remains unchanged, increases the distance between the two ends of the boundary of the polarized film layer 10 and the display boundary of the display module, and guarantees the anti-light leakage effect of the display module.

[0053] In a possible implementation manner, after the boundary of the polarized film layer 10 in contact with the glue film layer 30 forms the recessed boundary 11, the recessed boundary 11 can be shaped as shown in Figure 5 , or as shown in Figure 6 , the entire boundary of the polarized film layer 10 in contact with the glue film layer 30 forms the recessed boundary 11, as long as the minimum distance between the recessed boundary 11 and the display boundary of the display module meets the anti-light leakage display condition.

[0054] The display module provided in the embodiments 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, the display side of the non-bending area is provided with the polarizing film layer, the remaining area on the display panel on the same side of 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 recessed boundary with a recessed direction away from the bending area, and the minimum distance between the recessed boundary and the display boundary of the display module meets the anti-leakage light display condition. In the present application, the boundary of the polarizing film layer close to the colloidal film layer is specially shaped, so that the boundary where the polarizing film layer contacts the colloidal film layer has a recessed direction away from the bending area, thereby increasing the contact area of the colloidal film layer and the polarizing film layer, effectively reducing the siphon effect caused by the surface tension of the boundary section of the polarizing film layer, avoiding the accumulation of colloids, and achieving the effect of reducing the thickness of colloids at the boundary, avoiding the stress concentration at the starting position of the bending area, and avoiding the problems of bending cracks, bright lines and the like of the display module.

[0055] In one embodiment, the boundary where the polarizing film layer 10 contacts the colloidal 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.

[0056] In the present application, the second direction intersects the recessed direction of the recessed boundary.

[0057] When the recessed direction of the recessed boundary 11 is the vertical direction of the display boundary of the display module, the second direction can be the parallel direction of the display boundary of the display module.

[0058] In the embodiments of the present application, the boundary where the polarizing film layer 10 contacts the colloidal film layer 30 is only partially recessed, which can increase the bonding area of the polarizing film layer 10 and the CG, i.e., increase the ink overlap area on the polarizing film layer 10, avoid the problem of bonding bubbles, and avoid the problem of light leakage.

[0059] In one possible implementation, the recessed boundary 11 can be located at the middle position of the boundary where the polarizing film layer 10 contacts the colloidal film layer 30, as shown in FIG. 1B, or can be located at the end of the boundary where the polarizing film layer 10 contacts the colloidal film layer 30, as shown in FIG. 1C, and the present application does not limit this. Figure 4 Figure 7 In one embodiment, as shown in FIG. 1D, 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.

[0060] Figure 8

[0061] ​​​In the embodiments of the present application, the recessed boundary 11 can be located at the middle position of the boundary where the polarized film layer 10 contacts the colloidal 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 polarized film layer 10 contacts the colloidal film layer 30, which can further avoid the light emitted by the display panel 20 from leaking out of the display module in the second direction, thereby improving the light leakage prevention effect of the display module.

[0062] In a possible implementation manner, the length of the first sub-boundary 121 and the second sub-boundary 122 in the second direction is the same.

[0063] In the display module provided by the embodiments of the present application, the boundary where the polarized film layer contacts the colloidal film layer further includes a non-recessed boundary, that is, the boundary where the polarized film layer contacts the colloidal film layer is only partially recessed, thereby increasing the bonding area of the polarized film layer and the protective glass, increasing the ink overlap area on the polarized film layer, avoiding the bonding bubble problem, avoiding the light leakage problem, and ensuring the light leakage prevention effect of the display module.

[0064] The foregoing embodiments introduce a light leakage prevention scheme by ensuring the ink overlap area on the polarized film layer 10. In the embodiments of the present application, the related parameters of the boundary where the polarized film layer 10 contacts the colloidal film layer 30 can be limited to ensure the ink overlap area on the polarized film layer 10.

[0065] In an 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 polarized film layer 10.

[0066] In the embodiments of the present application, the proportion of the length of the non-recessed boundary 12 to the length of the polarized film layer 10 in the second direction can be increased to ensure the ink overlap area on the polarized film layer 10. For example, in the second direction, the length of the non-recessed boundary 12 is greater than or equal to one fourth of the length of the polarized film layer.

[0067] As shown in FIG. 1, Figure 9 In the case where the non-recessed boundary 12 includes the first sub-boundary 121 and the second sub-boundary 122, the length l of the first sub-boundary 121 or the second sub-boundary 122 is greater than or equal to one eighth of the length of the polarized film layer. That is: l≥L / 8.

[0068] In an embodiment, the recess depth of the recessed boundary 11 can be limited. In this embodiment, in the vertical direction of the second direction, the depth of the recessed boundary 11 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 12.

[0069] In the embodiments of the present application, the proportion of the depth of the recess boundary 11 to the first distance in the vertical direction of the second direction can be reduced to ensure the ink overlap area on the polarizing film layer 10. For example, the depth h of the recess boundary 11 is greater than or equal to one third of the first distance H. That is, h≥H / 3.

[0070] In one embodiment, the recess boundary 11 includes a first recess sub-boundary 111, a second recess sub-boundary 112, and a third recess sub-boundary 113. The first recess sub-boundary 111 and the second recess sub-boundary 112 have the same length, and the third recess sub-boundary 113 is parallel to the second direction. The first recess sub-boundary 111, the third recess sub-boundary 113, and the second recess sub-boundary 112 are sequentially connected to form a trapezoidal shape.

[0071] In the embodiments of the present application, as shown in Figure 9 the recess boundary 11 can be a trapezoidal shape composed of three sub-boundaries. Among them, the first recess sub-boundary 111 is connected to the first sub-boundary 121 in the second direction, and the second recess sub-boundary 112 is connected to the second sub-boundary 122 in the second direction.

[0072] At this time, the angle between the first recess sub-boundary 111 and the first sub-boundary 121 can be increased, or the angle between the second recess sub-boundary 112 and the second sub-boundary 122 can be increased to ensure the ink overlap area on the polarizing film layer 10. For example, the angle between the first recess sub-boundary 111 and the non-recess boundary 12 is greater than or equal to 80°. That is, A≥80°.

[0073] In one embodiment, as shown in Figure 9 the connection between the first recess sub-boundary 111 and the third recess 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 gel film layer 30 are in contact, that is, further reduce the gel thickness at the boundary, and reduce the stress at the starting position of the bending area of the display panel 20.

[0074] At this time, on the basis of limiting the length of the non-recess boundary 12 in the second direction, the radius of the arc-shaped connection can be increased to ensure the ink overlap area on the polarizing film layer 10. For example, the radius R of the arc-shaped connection is greater than or equal to 0.2 millimeters. That is, R≥0.2mm.

[0075] The display module provided in the embodiments of the present application limits the length of the non-recess boundary in the second direction, the depth of the recess boundary in the vertical direction of the second direction, the angle between the recess boundary and the non-recess boundary, and the radius of the arc-shaped connection of the recess boundary to ensure the ink overlap area on the polarizing film layer, avoid the problem of air bubbles between the polarizing film layer and the protective glass, avoid the problem of light leakage, and ensure the light leakage prevention effect of the display module.

[0076] like Figure 10 As shown in Embodiment 2, the thickness of the colloidal film layer at the starting point of the display panel's bend is effectively reduced by the recessed boundary of the polarizing film layer. Therefore, in Embodiment 3, based on Embodiment 2, the EBB boundary can be moved towards the boundary of the polarizing film layer to shorten the maximum distance between the EBB boundary and the polarizing film layer, thereby achieving a narrow bezel. However, during the process of the EBB moving towards the boundary of the polarizing film layer, the thickness of the colloidal film layer at the starting point of the display panel's bend increases, leading to an increase in stress at the starting point of the display panel's bend. Therefore, the movement of the EBB boundary is stopped until the maximum distance between the EBB boundary and the polarizing film layer is shortened from M to m. At this point, the thickness of the colloidal film layer at the starting point of the display panel's bend reaches its maximum thickness, and the stress at the starting point of the display panel's bend also reaches its maximum.

[0077] In one embodiment, such as Figure 10 and Figure 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.

[0078] Wherein, the second distance m is the distance between the recessed boundary 11 and the display boundary of the display panel 20 when there is a recessed boundary 11 at the boundary where the polarizing film layer 10 and the colloidal film layer 30 are in contact, and the colloidal thickness at the starting position of the bending area 21 of the display panel 20 is the maximum colloidal thickness.

[0079] The third distance M is the distance between the boundary of the polarizing film layer 10 and the colloidal film layer 30 and the display boundary of the display panel 20 when there is no recessed boundary 11 at the boundary where the polarizing film layer 10 and the colloidal film layer 30 are in contact, and the thickness of the colloidal material at the starting position of the bending area 21 of the display panel 20 is the maximum thickness of the colloidal material.

[0080] In this embodiment, when there is no recessed boundary 11 at the contact boundary between the polarizing film layer 10 and the colloidal film layer 30, the thickness of the colloidal material at the starting position of the bending region 21 of the display panel 20 is relatively large, resulting in high stress and a tendency to develop bending cracks. Therefore, it is necessary to ensure that the distance between the contact boundary between the polarizing film layer 10 and the colloidal film layer 30 and the EBB boundary is sufficiently large to guarantee that the thickness of the colloidal material at the starting position of the bending region 21 is within the maximum colloidal thickness range that the starting position of the bending region 21 can withstand.

[0081] That is, when there is no recessed boundary 11 at the boundary where the polarizing film layer 10 contacts the colloidal film layer 30, and the thickness of the colloidal material at the starting position of the bending area 21 of the display panel 20 is the maximum colloidal thickness T, the distance between the boundary where the polarizing film layer 10 contacts the colloidal film layer 30 and the EBB boundary is the third distance M.

[0082] In the case that the boundary between the polarizing film layer 10 and the colloid film layer 30 is the recess boundary 11, the distance between the recess boundary 11 and the EBB boundary can be reduced to further achieve a narrow frame of the display module, on the basis of reducing the colloid thickness at the starting position of the bending area 21.

[0083] It can be understood that, in the case that the boundary between the polarizing film layer 10 and the colloid film layer 30 is the recess boundary 11, the distance between the recess boundary 11 and the EBB boundary should be within the range of the second distance and the third distance to further achieve a narrow frame.

[0084] In the display module provided by the embodiments of the present application, in the case that the boundary between the polarizing film layer and the colloid film layer is the recess boundary, the distance between the recess 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 is further achieved.

[0085] In one embodiment, a display device is provided, which includes the display module as described in the above embodiments. 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 the polarizing film layer 10, the remaining area on the display panel 20 on the same side as the polarizing film layer 10 is coated with a colloid film layer 30, the boundary between the polarizing film layer 10 and the colloid film layer 30 includes a recess boundary 11, the recess boundary 11 is away from the bending area 21 in the recess direction, and the minimum distance between the recess boundary 11 and the display boundary of the display module satisfies a light leakage prevention display condition.

[0086] In the embodiments of the present application, the light leakage prevention display condition is that the minimum distance between the recess boundary 11 and the display boundary of the display module is sufficient to avoid light emitted by the display panel from leaking out of the non-display area of the display module. For example, the light leakage prevention display condition can be that the minimum distance between the recess boundary 11 and the display boundary of the display module is greater than or equal to 220 microns.

[0087] In a possible implementation, to achieve a narrow frame, the minimum distance between the recess boundary 11 and the display boundary of the display module is less than 250 microns. That is, the minimum distance between the recess boundary 11 and the display boundary of the display module can be within the range of 220-250 microns, on the basis of preventing light leakage, a narrow frame of the display module is further achieved.

[0088] In the embodiments of the present application, the display panel 20 of the display module includes a bending area 21 and a non-bending area 22, and in the case where the glue film layer 30 is coated on the bending area 21 of the display panel 20, in order to avoid the stress concentration of the bending area 21 caused by the glue accumulation in the area close to the polarizing film layer 10, the problems such as cracks and bright lines, the shaped setting can be performed on the boundary of the polarizing film layer 10 close to the glue film layer 30, so that the boundary of the polarizing film layer 10 in contact with the glue film layer 30 has a recessed boundary 11 with a recessed direction away from the bending area 21, thereby the cross-sectional area of the boundary of the polarizing film layer 10 in contact with the glue film layer 30 can be increased, that is, the contact area between the glue film layer 30 and the polarizing film layer 10 is increased, and then the siphon effect caused by the surface tension of the boundary cross section of the polarizing film layer 10 can be effectively reduced, the glue accumulation can be avoided, the glue thickness at the boundary can be reduced, and the stress concentration at the bending area 21, especially at the starting position of the bending area 21 (i.e., the junction of the bending area 21 and the non-bending area 22) can be avoided.

[0089] It should be noted that when the recessed boundary 11 of the polarizing film layer 10 is set based on the conventional frame structure, the recessed boundary 11 can be formed by extending the two ends of the boundary of the polarizing film layer 10 in the direction towards the bending area 21, so as 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 and avoids light leakage. For example, as shown in FIGS. 11 and 12, which are the front view comparison and cross-sectional comparison diagrams of the conventional scheme and the scheme (improved scheme) of the present application, the present application extends the two ends of the boundary of the polarizing film layer 10 in the direction towards the EBB boundary to form the recessed boundary 11, avoids directly digging part of the polarizing film layer 10 to form the recessed boundary 11, ensures that the minimum distance between the recessed 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. Figure 5

[0090] In a possible implementation manner, after the boundary of the polarizing film layer 10 in contact with the glue film layer 30 forms the recessed boundary 11, the recessed boundary 11 can have the shape as shown in FIG. 13, or the entire boundary of the polarizing film layer 10 in contact with the glue film layer 30 can form the recessed boundary 11, as shown in FIG. 14, as long as the minimum distance between the recessed boundary 11 and the display boundary of the display module meets the anti-light leakage display condition. Figure 5 Figure 6

[0091] ​​​The display device provided by the embodiment of the present application comprises a display module, the display module comprises a polarized film layer and a display panel, the display panel comprises a bending area and a non-bending area, the display side of the non-bending area is provided with the polarized film layer, the remaining area on the display panel on the same side of the polarized film layer is coated with a colloidal film layer, the boundary of the polarized film layer in contact with the colloidal film layer comprises 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 satisfies the light leakage prevention display condition. The present application performs special-shaped setting on the boundary of the polarized film layer close to the colloidal film layer, so that the boundary of the polarized film layer in contact with the colloidal film layer has a concave with a concave direction away from the bending area, thereby increasing the contact area of the colloidal film layer and the polarized film layer, effectively reducing the siphon effect caused by the surface tension of the boundary section of the polarized film layer, avoiding the accumulation of colloids, achieving the effect of reducing the thickness of colloids 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, and improving the display effect of the display device.

[0092] In one embodiment, a preparation method of a display module is provided, the display module comprising a polarized film layer 10 and a display panel 20, the display panel 20 comprising a bending area 21 and a non-bending area 22; the preparation method of the display module comprises: forming the polarized film layer 10 on the display side of the non-bending area 22 of the display panel 20; removing a part of the polarized film layer 10 close to the bending area 21, and forming a concave boundary 11 on the boundary of the polarized film layer 10 close to the bending area 21; forming a colloidal film layer 30 on the remaining area on the display panel 20 on the same side of the polarized film layer 10.

[0093] The minimum distance between the concave boundary 11 and the display boundary of the display module satisfies the light leakage prevention display condition.

[0094] The light leakage prevention display condition is that the minimum distance between the concave boundary 11 and the display boundary of the display module is sufficient to avoid the light emitted by the display panel from leaking out from the non-display area of the display module. For example, the light leakage prevention display condition can be that the minimum distance between the concave boundary 11 and the display boundary of the display module is greater than or equal to 220 microns.

[0095] In the embodiments of the present application, when the display module is prepared, a rectangular polarized film layer 10 is first formed on the display side of the non-bending area 22 of the display panel 20, and then a part of the polarized film layer 10 close to the bending area 21 is removed to form a recess boundary 11 close to the bending area 21 of the polarized film layer 10. When the part of the polarized film layer 10 close to the bending area 21 is removed, it is necessary to ensure that the minimum distance between the recess boundary 11 and the display boundary of the display module meets the anti-leakage display condition. For example, it is necessary to ensure that the minimum distance between the recess boundary 11 and the display boundary of the display module is greater than or equal to 220 microns. Finally, the remaining area on the same side of the display panel 20 as the polarized film layer 10 is coated with a colloidal layer 30. At this time, the boundary between the polarized film layer 10 and the colloidal layer 30 has a recess boundary 11, which increases the contact area between the colloidal layer 30 and the polarized film layer 10, effectively reduces the siphon effect, reduces the thickness of the colloidal layer at the starting position of the bending area 21, and thus effectively avoids bending cracks, bright lines and other problems.

[0096] The display module preparation method provided in the embodiments of the present application forms a recess boundary between the boundary where the polarized film layer and the colloidal layer are in contact, thereby increasing the contact area between the colloidal layer and the polarized film layer, effectively reducing the siphon effect caused by the surface tension of the cross section of the boundary of the polarized film layer, avoiding colloidal accumulation, reducing the thickness of the colloidal layer at the boundary, and avoiding stress concentration at the bending area, especially at the starting position of the bending area, thereby avoiding bending cracks, bright lines and other problems of the display module.

[0097] The above description is merely preferred embodiments of the present application and a description of the principles of the technology used. Those skilled in the art should understand that the scope of the application disclosed in the present application is not limited to the technical solutions formed by the specific combinations of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or equivalent features without departing from the inventive concept. For example, the above features can be replaced with the technical features disclosed in the present application (but not limited to) having similar functions to form technical solutions.

Claims

1. A display module, characterized by The display module comprises a polarizing film layer, a gel 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 gel film layer is coated on the display side of the display panel and is in contact with the boundary of the polarizing film layer close to the bending area, The boundary of the polarizing film layer in contact with the gel film layer comprises a recess boundary with a recess direction towards a first direction, the distance between the recess boundary and the display boundary of the display module satisfies a light leakage prevention display condition; the first direction is a direction away from the bending area; The boundary of the polarizing film layer in contact with the gel film layer further comprises a non-recess boundary, the recess boundary and the non-recess boundary are in contact in a second direction; the second direction intersects with the first direction; The distance between the recess boundary and the display boundary of the display panel is between a second distance and a third distance; the second distance is the distance between the recess boundary and the display boundary of the display panel when the recess boundary exists in the boundary of the polarizing film layer in contact with the gel film layer and the gel thickness at the starting position of the bending area of the display panel is the maximum gel thickness; the third distance is the distance between the boundary of the polarizing film layer in contact with the gel film layer and the display boundary of the display panel when the recess boundary does not exist in the boundary of the polarizing film layer in contact with the gel film layer and the gel thickness at the starting position of the bending area of the display panel is the maximum gel thickness.

2. The display module of claim 1, wherein, The light leakage prevention display condition is that the minimum distance between the recess boundary and the display boundary of the display module is greater than or equal to 220 microns.

3. The display module of claim 1, wherein, The non-recess boundary comprises a first sub-boundary and a second sub-boundary, In the second direction, the recess boundary is located between the first sub-boundary and the second sub-boundary.

4. The display module of claim 3, wherein, The lengths of the first sub-boundary and the second sub-boundary in the second direction are the same.

5. The display module of claim 1, wherein, In the second direction, the length of the non-recess boundary is related to the length of the polarizing film layer; the length of the non-recess boundary is greater than or equal to one fourth of the length of the polarizing film layer.

6. The display module of claim 1, wherein, In the vertical direction of the second direction, the depth of the recess boundary is related to a first distance; the first distance is the distance between the display boundary of the display module and the non-recess boundary.

7. The display module of claim 6, wherein, The depth of the recess boundary is greater than or equal to one third of the first distance.

8. The display module of claim 1, wherein, The recess boundary comprises a first recess sub-boundary, a second recess sub-boundary and a third recess sub-boundary, the first recess sub-boundary and the second recess sub-boundary have the same length, the third recess sub-boundary is parallel to the second direction, The first recess sub-boundary, the third recess sub-boundary and the second recess sub-boundary are sequentially connected to form a trapezoidal shape.

9. The display module of claim 8, wherein, The included angle between the first recess sub-boundary and the non-recess boundary is greater than or equal to 80°.

10. The display module of claim 8, wherein, The connection between the first recess sub-boundary and the third recess sub-boundary is arc-shaped.

11. The display module of claim 10, wherein, The radius of the arc shape is greater than or equal to 0.2 millimeters.

12. A display device comprising: The display device comprises the display module according to any one of claims 1-11.

13. A method for manufacturing a display module, characterized by: 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; removing a part of the polarizing film layer close to the bending area, forming a recess boundary with a recess direction towards a first direction on the boundary of the polarizing film layer close to the bending area; the distance between the recess boundary and the display boundary of the display module meets the anti-leakage display condition; the first direction is the direction away from the bending area; forming a colloid film layer on the remaining area on the same side of the display panel as the polarizing film layer; the colloid film layer is connected with the boundary of the polarizing film layer close to the bending area; the boundary of the polarizing film layer in contact with the colloid film layer includes the recess boundary; the boundary of the polarizing film layer in contact with the colloid film layer also includes a non-recess boundary, the recess boundary and the non-recess boundary are connected in a second direction; the second direction intersects with the first direction; the distance between the recess boundary and the display boundary of the display panel is between a second distance and a third distance; the second distance is the distance between the recess boundary and the display boundary of the display panel when the recess boundary exists on the boundary of the polarizing film layer in contact with the colloid film layer, 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 of the polarizing film layer in contact with the colloid film layer and the display boundary of the display panel when the recess boundary does not exist on the boundary of the polarizing film layer in contact with the colloid film layer, and the colloid thickness at the starting position of the bending area of the display panel is the maximum colloid thickness.

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