Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
In the prior art, fig. 1 is a schematic structural diagram of a display module in the prior art, and as shown in fig. 1, a display module 10 includes a display panel 11 and a supporting structure 12 located at one side of the display panel 11, and the display panel 11 includes an alignment structure 13; the supporting structure 12 includes a notch structure 14 penetrating through the supporting structure 12 along the thickness direction of the display panel 11, and the notch structure 14 and the alignment structure at least partially overlap along the thickness direction of the display panel 1, because the display panel 11 includes a plane area and a curved surface area, after the display panel 1 and the supporting structure 12 are attached, the notch structure 14 is easy to collapse, collapse or squeeze the corner during the preparation process due to the notch structure 14, and when the attachment precision of the display panel 11 and the supporting structure 12 is detected, a detection error is easy to exist, which affects the reliability of the detection result, and further affects the yield of the display module 10.
In order to solve the technical problems, an embodiment of the invention provides a display module, which comprises a display panel and a support structure positioned at one side of the display panel; the display panel comprises a first display area and a second display area which are connected with each other, wherein the curvature radius of the first display area is larger than that of the second display area; the support structure comprises a first support structure and a second support structure which are connected with each other, and the elastic modulus of the first support structure is smaller than that of the second support structure; the first display area at least partially overlaps the first support structure along the thickness direction of the display panel, and the second display area at least partially overlaps the second support structure; the first support structure comprises at least one notch positioned at the edge, the notch at least partially penetrates through the first support structure along the thickness direction of the display panel, the first display area comprises at least one alignment mark unit, and the notch and the alignment mark unit at least partially overlap along the thickness direction of the display panel.
By adopting the technical scheme, the elastic modulus of the first supporting structure is smaller than that of the second supporting structure in the supporting structure, so that when a notch is formed on the supporting structure, the problem of collapse in the notch preparation process is reduced, the detection structure of the attaching precision of the display panel and the supporting structure is ensured, the attaching risk of the display panel and the supporting structure is reduced, and the using effect of the display module is further ensured.
The foregoing is the core idea of the present invention, and the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without making any creative effort fall within the protection scope of the present invention.
Fig. 2 is a schematic structural diagram of a display module according to an embodiment of the present invention, and fig. 3 is a schematic structural diagram of a top view of the display module according to an embodiment of the present invention, where, as shown in fig. 2 and fig. 3, the display module 100 includes a display panel 101 and a supporting structure 102 located at one side of the display panel 101; the display panel 101 includes a first display region 1011 and a second display region 1012 connected to each other, the first display region 1011 having a radius of curvature larger than that of the second display region 1012; the support structure 102 comprises a first support structure 1021 and a second support structure 1022 connected to each other, the first support structure 1021 having a modulus of elasticity that is less than the modulus of elasticity of the second support structure 1022; along the thickness direction of the display panel 101, the first display region 1011 at least partially overlaps the first support structure 1021, and the second display region 1012 at least partially overlaps the second support structure 1022; the first supporting structure 1021 includes at least one notch 103 at an edge, and the notch 103 at least partially penetrates the first supporting structure 1021 along a thickness direction of the display panel 101, and the first display area 1011 includes at least one alignment mark unit 104, and the notch 103 and the alignment mark unit 104 at least partially overlap along the thickness direction of the display panel 101.
The display module 100 comprises a display panel 101 and a supporting structure 102 positioned on one side of the display panel 101; as shown in fig. 1, the display panel 101 includes a first display area 1011 and second display areas 1012 located at two sides of the first display area 1011, wherein the first display area 1011 is connected to the second display areas 1012 at two sides, respectively, the radius of curvature of the first display area 1011 is larger than that of the second display area 1012, the display panel 101 may be a flexible curved display panel, the first display area 1011 is a plane area, and the second display area 1012 is a curved area. The supporting structure 102 may be a composite adhesive tape (SCF), which plays a role in protecting, buffering, supporting, etc. the display panel 101. Illustratively, the support structure 102 includes a first support structure 1021 and a second support structure 1022 disposed on two sides of the first support structure 1021, where the first support structure 1021 is connected to the second support structure 1022, and the first display area 1011 at least partially overlaps the first support structure 1021 and the second display area 1012 at least partially overlaps the second support structure 1022 along the thickness direction (e.g., Y direction in the figure) of the display panel 101. Compared with the prior art that the elastic modulus of the first supporting structure 1021 is the same as that of the second supporting structure 1022, the embodiment of the invention controls the elastic modulus of the first supporting structure 1021 to be smaller than that of the second supporting structure 1022, so that the overall strength of the supporting structure 102 is improved, the collapse problem of the notch 103 can be effectively reduced in the preparation process of the notch 103 by using an external cutter, the shape of the notch 103 is ensured to meet the preset shape, the follow-up detection is facilitated, and the accurate detection result is ensured. The first support structure 1021 includes at least one notch 103 located at an edge 1023, where the edge 1023 is a side of the first support structure 1021 that is not connected to the second support structure 1022, and the edge 1023 includes two parallel sides, where the notch 103 may be disposed on both edges, or may be disposed on any one of the edges 1023, and the number of the notches 103 may be selected according to practical design requirements. As shown in fig. 3, two notches 103 are formed, the notches 103 are arranged on the same side at intervals, the first display area 1011 of the display panel 101 is provided with two alignment mark units 104, the alignment mark units 104 are arranged at intervals, the alignment mark units 104 can be arranged on a flexible substrate far away from the light emitting side in the display panel 101, the alignment mark units 104 can be formed by etching process, the alignment mark can be cross-shaped, T-shaped or the like, and can be selected according to the actual design requirement, and the embodiment of the invention is not particularly limited. In the thickness direction of the display panel 101, the notch 103 at least partially penetrates through the first supporting structure 1021, and in the thickness direction of the display panel 101, the notch 103 and the alignment mark unit 104 at least partially overlap, the notch 103 exposes the alignment mark unit 104, and then the alignment accuracy of the display panel 101 and the supporting structure is judged by the distance between the notch 103 and the alignment mark unit 104.
According to the embodiment of the invention, the display panel is supported by the support structure, the alignment mark unit is arranged in the first display area of the display panel, the corresponding notch is arranged on the support structure, the bonding effect between the display panel and the support structure is judged by the distance between the alignment mark unit and the notch, meanwhile, in order to reduce the collapse phenomenon in the notch manufacturing process, the elastic modulus of the first support structure is smaller than that of the second support structure, the integral strength of the support structure is improved, and the bonding effect of the display panel and the support structure is further ensured.
Optionally, fig. 4 is a schematic structural diagram of a support structure according to an embodiment of the present invention, as shown in fig. 4, along a thickness direction of the display panel 101, the first support structure 1021 includes at least a first support layer 105, a second support layer 106, and a third support layer 107 that are stacked; the second support structure 1022 comprises at least a fourth support layer 108 and a fifth support layer 109 arranged in a stack; the elastic modulus of each of the first support layer 105, the second support layer 106, the third support layer 107, and the fourth support layer 108 is smaller than that of the fifth support layer 109.
The first support structure 1021 and the second support structure 1022 are arranged differently, so that the difference of the elastic moduli of the first support structure 1021 and the second support structure 1022 is affected, the first support structure 1021 can include a first support layer 105, a second support layer 106 and a third support layer 107 which are arranged in a lamination manner along the vertical light emitting direction of the display panel, namely, the Y direction in the figure, namely, the structure of the first support structure 1021 is a traditional composite adhesive tape structure, and the first support layer 105 can be made of metal materials such as copper foil, aluminum foil and the like, so that a certain scattering effect is achieved; the second support layer 106 may be a polyimide layer (PI) or a graphite layer, increasing the reliability of the support structure 102; the third supporting layer 107 is a foam layer, and plays a role in buffering and shading. The second supporting structure 1022 includes a fourth supporting layer 108 and a fifth supporting layer 109 that are stacked along the vertical light emitting direction of the display panel, i.e. the Y direction in the drawing, where the fourth supporting layer 108 may be made of a metal material such as copper foil, aluminum foil, etc., and the fifth supporting layer 109 may be made of a metal material with a large elastic modulus such as steel, etc., so that the elastic moduli of the first supporting layer 105, the second supporting layer 106, the third supporting layer 107, and the fourth supporting layer 108 are smaller than those of the fifth supporting layer 109, at this time, the elastic modulus of the first supporting structure 1021 is smaller than that of the second supporting structure 1022, and when the external cutter performs die-cutting to prepare the notch 103 on the supporting structure 102, the deformation of the supporting structure 102 is smaller under the same die-cutting force, and meanwhile, the elastic moduli of the first supporting layer 105 and the fourth supporting layer 108 are very good, so that the collapse problem of the notch 103 is effectively reduced. The supporting structure 102 further comprises a protective layer, a release film layer and an adhesive layer, wherein the protective layer is located on one side, close to the first supporting layer 105 and the fourth supporting layer 108, of the second supporting layer 106, the release film layer is located on one side, far away from the second supporting layer 106, of the third supporting layer 107, the adhesive layer is used for connecting the third film layer and the release film layer, and the adhesive layer can be an reticulate pattern adhesive layer (EMBO), so that the supporting structure plays roles in supporting, protecting, buffering, shading, radiating and shielding the display panel, and the using effect of the display module is improved.
Optionally, fig. 5 is a schematic structural diagram of another support structure according to an embodiment of the present invention, as shown in fig. 5, the thickness of the first support layer 105 is H1, the thickness of the second support layer 106 is H2, the thickness of the third support layer 107 is H3, the thickness of the fourth support layer 108 is H4, and the thickness of the fifth support layer 109 is H5, where h1+h2+h3 is equal to or less than h4+h5.
In the supporting structure 102 of the prior art, which is the first supporting structure 1021, the second supporting layer 106 and the third supporting layer 107 in the supporting structure 102 overlapped with the second display area 1012 are cut away along the thickness direction of the display panel 101, and the fifth supporting layer 109 with a large elastic modulus is used for filling, as shown in fig. 4, the sum of the thickness of the fifth supporting layer 108 and the thickness of the fourth supporting structure 107 is the same as the sum of the thicknesses of the first supporting structure, the second supporting layer 106 and the third supporting layer 107, i.e. h1+h2+h3=h4+h5, or as shown in fig. 5, the thickness of the fourth supporting layer 108 is greater than the sum of the thickness of the second supporting layer 106 and the third supporting layer 107, i.e. h1+h2+h3 < h4+h5, so as to ensure that the elastic modulus of the second supporting structure 1022 is greater than the elastic modulus of the first supporting structure 1021, increase the overall strength of the supporting structure 102, and reduce the problem of the notch 103.
Alternatively, fig. 6 is a schematic structural diagram of another support structure according to an embodiment of the present invention, and as shown in fig. 6, the first support layer 105 and the fourth support layer 108 are integrally disposed.
As shown in fig. 6, the first supporting layer 105 and the fourth supporting layer 108 are integrally arranged, so that the preparation process is simplified, the elastic moduli of the first supporting layer 105 and the fourth supporting layer 108 are the same, and only the second supporting layer 106, the third supporting layer 107 and the fifth supporting layer 109 are arranged in a different manner, so that the elastic modulus of the fifth supporting layer 109 is ensured to be greater than the elastic moduli of the second supporting layer 106 and the third supporting layer 107, and the strength of the supporting structure 102 is ensured.
Optionally, fig. 7 is a schematic structural diagram of another display module according to an embodiment of the present invention, as shown in fig. 7, the fifth supporting layer 108 includes a plurality of hollow structures 110, and the hollow structures 110 at least partially penetrate through the fifth supporting layer 109 along the thickness direction of the display panel 101.
Because the bending degree of the second supporting structure 1022 and the second display area 1012 is required to be matched, but the stress of the fifth supporting layer 109 is larger, and bending is not easy to occur, the shape of the hollow structure 110 may be a circular shape, a square shape, a rectangular shape, a triangular shape, or the like, by arranging the hollow structure 110 in the fifth supporting layer 109, the embodiment of the invention is not particularly limited, the coverage area of the hollow structure 110 is reasonably arranged to properly reduce the stress of the fifth supporting layer 109, so that the second supporting structure 1022 is convenient to bend, the hollow structure 110 may penetrate through the fifth supporting layer 109 or may partially penetrate through the fifth supporting layer 109, and the embodiment of the invention is not particularly limited.
Optionally, fig. 8 is a schematic structural diagram of another supporting structure provided in the embodiment of the present invention, and fig. 9 is a schematic structural diagram of another supporting structure provided in the embodiment of the present invention, as shown in fig. 8 and fig. 9, the sum of coverage areas of the hollow structures 110 in a unit area is gradually reduced along a first direction, where the first direction (X direction as shown in the figure) is parallel to a direction along the first display area 1011 pointing to the second display area 1012.
The sum of the coverage areas of the hollow structures 110 in the unit area is gradually reduced along the first direction, the size or the division density of the hollow structures 110 is gradually changed, the shape of the hollow structures 110 can be circular, square, rectangular, triangular and the like, the embodiment of the invention is not particularly limited, the hollow structures 110 are shown as a circle in the exemplary diagram, and the stress of the second support structures 1022 is gradually increased along the first direction, so that the second support structures 1022 which are closer to the first support structures 1021 are easier to bend to match the bending degree of the second display area 1012, and the alignment and lamination effects between the display panel 101 and the support structures 102 are ensured.
Optionally, with continued reference to fig. 8, the distribution density of the hollowed-out structures 110 gradually decreases along the first direction.
When the shape and the size of the hollow structure 110 are the same, the division density of the hollow structure 110 is adjusted, so that the sum of the coverage areas of the hollow structure 110 in a unit area is gradually reduced along the first direction, the distribution density of the hollow structure 110 is specifically reduced along the first direction, the stress of the second support structure 1022 is gradually increased along the first direction, and the second support structure 1022 is convenient to bend, so that the alignment and lamination effect between the display panel 101 and the support structure 102 is ensured.
Optionally, with continued reference to fig. 9, along the first direction, the coverage area of the hollowed-out structure 110 gradually decreases.
When the division densities of the hollow structures 110 are the same, the coverage densities of the hollow structures 110 are adjusted to realize that the sum of the coverage areas of the hollow structures 110 is gradually reduced in a unit area along the first direction, specifically, the coverage area of the hollow structures 110 is gradually reduced in the first direction, so that the stress of the second support structures 1022 is gradually increased in the first direction, and the second support structures 1022 are convenient to bend, so that the alignment and bonding effect between the display panel 101 and the support structures 102 is ensured.
Optionally, the notch 103 is at least one of rectangular and trapezoidal in shape.
The shape of the notch 103 may be rectangular, trapezoidal, square, etc., as shown in fig. 3, the shape of the notch 103 is a right trapezoid, and the shape of the notch 103 may be selected according to actual design requirements, which is not specifically limited in the embodiment of the present invention.
Alternatively, fig. 10 is a schematic structural diagram of a portion a of a display module shown in fig. 3, where, as shown in fig. 10, the notch 103 includes a first surface 111 parallel to a first direction and a second surface 112 perpendicular to the first surface 111 and connected to the first surface 111, a distance between the first surface 111 and the alignment mark unit 104 is L1, a distance between the second surface 112 and the alignment mark unit 104 is L2, where L1 is less than or equal to 0.33mm and less than or equal to 0.37mm, L2 is less than or equal to 0.33mm and less than or equal to 0.37mm, and the first direction is parallel to a direction in which the first display area 1011 points to the second display area 1012.
The distance between the notch 103 and the alignment mark unit 104 is determined, so that the distance is ensured to be within a preset range, that is, the alignment effect between the display panel 101 and the supporting structure 102 is determined, and the yield and the use effect of the display module 100 formed by the display panel 101 and the supporting structure 102 are ensured.
Alternatively, as shown in fig. 10, the notch 103 includes a first notch 1031 and a second notch 1032, the alignment mark unit 104 includes a first alignment mark unit 1041 and a second alignment mark unit 1042, the first notch 1031 at least partially overlaps the first alignment mark unit 1041 along the thickness direction of the display panel 101, the second notch 1032 at least partially overlaps the second alignment mark unit 1042, and the first notch 1031 and the second notch 1032 are centrally and symmetrically disposed with respect to the first display area 1011.
The first support structure 1021 includes at least two notches disposed on the same side of the first support structure 1021 at intervals, and the notches include a first notch 1031 and a second notch 1032; the display panel 101 includes at least two alignment mark units 104 located at the same side of the display panel 101 and disposed at intervals, the alignment mark units 104 include a first alignment mark unit 1041 and a second alignment mark unit 1042, along the thickness direction of the display panel 101, the first notch 1031 overlaps the first alignment mark unit 1041, the second notch 1032 overlaps the second alignment mark unit 1042, the first notch 1031 exposes the first alignment mark unit 1041, the second notch 1032 exposes the second alignment mark unit 1042, and the first notch 1031 and the second notch 1032 are disposed symmetrically along the center line L' with respect to the first display area 1011, so as to increase the accuracy of determining the alignment effect, and obtain a distance L1 between the first alignment mark unit 1031 and the first surface 111 of the first notch 1031 and a distance L2 between the first alignment structure and the second surface 112 of the second notch 1032 according to the positional relationship between the first notch 1031 and the first alignment mark unit 1041; according to the positional relationship between the second notch 1032 and the second alignment mark unit 1042, a distance l3 between the second alignment mark unit 1042 and the first surface 111 of the first notch 1031 and a distance l4 between the second alignment structure and the second surface 112 of the second notch 1032 are obtained, so as to determine whether l1, l2, l3 and l4 are within a reasonable range, ensure accurate determination of the alignment and lamination effects of the display panel 101 and the support structure 102, and further ensure the use effect of the display module 100.
Alternatively, fig. 11 is a schematic structural diagram of a portion a of another display module shown in fig. 3, where, as shown in fig. 11, the first notch 1031 and the second notch 1032 are integrally disposed.
Wherein, because the right angle structure is in the preparation process, the external cutter is in the die-cutting process of the first supporting structure 1021, the included angle formed between the first surface 111 and the second surface 112 is easy to generate the phenomenon of squeezing the angle, and the right angle cannot be formed, so that the detection of the distance between the alignment mark unit 104 and the notch 103 is affected, and the detection result is affected. The first notch 1031 and the second notch 1032 in the first support structure 1021 are integrally arranged, right angles in the first notch 1031 and the second notch 1032 are eliminated, and the alignment and lamination effect are judged through the distance L11 between the first marking unit and the first surface 111 of the first notch 1031 and the distance L22 between the second marking unit and the first surface 111 of the second notch 1032, so that the corner extrusion phenomenon is avoided, and the lamination precision detection result of the display panel 101 and the support structure 102 is influenced. To display panel 101 and bearing structure 102 counterpoint effect in the first direction, can utilize outside counterpoint check out test set to detect, and then guarantee the accurate judgement to the effect of counterpoint laminating of display panel 101 and bearing structure 102.
Based on the same inventive concept, the embodiment of the present invention further provides a display device, which includes the display module 100 of the foregoing embodiment, so that the display device provided in this embodiment has the same or corresponding beneficial effects as the display module 100 of the foregoing embodiment, and will not be described herein.
Fig. 12 is a schematic structural diagram of a display device according to an embodiment of the present invention, and as shown in fig. 12, a display device 200 includes the display module 100 according to the above embodiment. The display device 200 provided in the embodiment of the present invention may be a mobile phone as shown in fig. 12, or any electronic product with a display function, including but not limited to the following categories: television, notebook computer, desktop display, tablet computer, digital camera, smart bracelet, smart glasses, vehicle-mounted display, medical equipment, industrial control equipment, touch interactive terminal, etc., which are not particularly limited in this embodiment of the invention.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.