Display module and display device

Abstract

A display module (100) and a display device (1000) are provided. The display module (100) comprises a display field (10) and a support layer (20). The support layer (20) is arranged on a non-display side of the display field (10); the support layer (20) comprises a support plate (21) and a first support section (22) connected to the support plate (21). The support plate (21) is provided with a first hole (K1), and a first support section is arranged in the first hole; at least a portion of the first support section (22) is transparent. A side face of the support plate (21) located near the display field (10) is substantially flush with a side face of the first support section (22) located near the display field (10). The thickness of the support layer (21) is in the range of about 10 µm to about 200 µm.

Description

FIELD OF TECHNOLOGY

[0001] The present disclosure relates to the field of display technologies and, more particularly, to a display module and a display device. STATE OF THE ART

[0002] Fingerprint identification technology refers to a technology that can obtain fingerprint information by detecting and analyzing signals from valleys and ridges of a fingerprint through a fingerprint identification module. This technology has many advantages such as high security, simple and fast operation, and is therefore widely used in electronic products. Fingerprint imaging can be realized by a variety of technologies such as optical imaging, capacitive imaging, and ultrasonic imaging. Optical fingerprint identification technology has gradually become the mainstream of fingerprint identification technology due to its strong penetration ability, support for full-screen arrangement, and simple product structure design, and is therefore widely used in electronic products. SUMMARY

[0003] In one aspect, a display module is provided. The display module includes a display panel and a support layer.

[0004] The support layer is arranged on a non-display side of the display panel, and the support layer comprises a support plate and a first support portion connected to the support plate. The support plate is provided with a first hole, and the first support portion is arranged in the first hole; and at least a part of the first support portion is light-transmissive. A side surface of the support plate near the display panel is substantially flush with a side surface of the first support portion near the display panel; and a thickness of the support layer is in a range from about 10 µm to about 200 µm.

[0005] In some embodiments, the entire first support portion is made of a transparent material, and a side wall of the first support portion in a direction perpendicular to the display panel is fixedly connected to a hole wall of the first hole.

[0006] In some embodiments, the material of the first support portion comprises ultra-thin, flexible glass or polymethyl methacrylate; and / or a light transmittance of the first support portion is greater than or equal to 90%; and / or a modulus of elasticity of the first support portion is greater than or equal to 3 Gpa.

[0007] In some embodiments, the support layer further comprises an adhesive portion. The adhesive portion is disposed between the first support portion and the hole wall of the first hole, and the support plate and the first support portion are connected by the adhesive portion.

[0008] In some embodiments, the material of the adhesive portion comprises a light-shielding material.

[0009] In some embodiments, the material of the adhesive portion comprises a one-component epoxy adhesive; and / or a viscosity of the adhesive portion is in a range of 10,000 cP to 20,000 cP; and / or a distance between the first support portion and the inner hole wall of the first hole is in a range of 15 µm to 500 µm.

[0010] In some embodiments, the first support portion comprises a plurality of support strips, and at least two of the plurality of support strips are connected to a hole wall of the first hole; and the plurality of support strips and the hole wall of the first hole define a plurality of second holes.

[0011] In some embodiments, the plurality of support strips and the hole wall of the first hole are connected to each other to form a honeycomb structure or a lattice structure.

[0012] In some embodiments, the orthographic projection of a second hole on the display panel has the shape of a regular polygon, a circle, or an ellipse.

[0013] In some embodiments, the display panel includes a plurality of subpixels, and the orthographic projections of the plurality of support stripes on the display panel are staggered with the light-emitting regions of the plurality of subpixels.

[0014] In some embodiments, the width of a support strip is less than or equal to a distance between light-emitting regions of two adjacent subpixels; and / or an area of ​​the one second hole is greater than or equal to an area of ​​a light-emitting region of the one subpixel.

[0015] In some embodiments, the display module further comprises a buffer layer disposed on a side of the support layer proximate the display panel, and the buffer layer comprises a second support portion that is light-transmissive.

[0016] In some embodiments, the entire buffer layer is made of a transparent material.

[0017] In some embodiments, the material of the buffer layer comprises thermoplastic polyurethane elastomer rubber; and / or a light transmittance of the buffer layer is greater than or equal to 92%; and / or a modulus of elasticity of the buffer layer is in a range of 0.1 Gpa to 0.15 Gpa.

[0018] In some embodiments, the buffer layer is provided with a third hole, and the second support portion is disposed in the third hole.

[0019] In some embodiments, the material of the second support portion comprises polyethylene terephthalate; and / or a light transmittance of the second support portion is greater than or equal to 90%; and / or a modulus of elasticity of the second support portion is in a range of 0.5 Gpa to 1.5 Gpa.

[0020] In some embodiments, the display module further comprises an adhesive layer disposed on a side of the buffer layer near the display panel, and the second support portion is adhesively connected to the adhesive layer.

[0021] Another aspect is the provision of a display device. The display device comprises the display module according to any one of the preceding embodiments and an optical device arranged on a non-display side of the display module.

[0022] In some embodiments, the display device further comprises a light shielding layer disposed on a side of the support layer in the display module facing away from the display panel and covering the optical device.

[0023] In some embodiments, an orthographic projection of the first hole of the support plate of the support layer on the display panel lies within a range of an orthographic projection of the light-shielding layer on the display panel; in a case where the first support portion of the support layer comprises a plurality of second holes, orthographic projections of the plurality of second holes on the display panel lie within the range of the orthographic projection of the light-shielding layer on the display panel. SHORT DESCRIPTION OF THE CHARACTERS

[0024] In order to more clearly describe technical solutions in the present disclosure, accompanying drawings used in some embodiments of the present disclosure are briefly introduced below. However, the accompanying drawings described below are merely accompanying drawings of some embodiments of the present disclosure, and a person of ordinary skill in the art can obtain other drawings corresponding to these accompanying drawings. Furthermore, the accompanying drawings described below can be regarded as schematic representations and do not impose limitations on the actual sizes of products, the actual processes of methods, and the actual timing of signals involved in the embodiments of the present disclosure. Fig. 1 is a plan view of a display device according to some embodiments; Fig. 2 is a structural diagram of a display device according to some embodiments; Fig. 3 is a structural diagram of another display device according to some embodiments; Fig. 4 a cross section along the section line AA' in Fig. 1; Fig. 5 a cross section along the section line BB' in Fig. 1; Fig. 6 another cross section along the section line BB' in Fig. 1; Fig. 7 another cross section along the section line BB' in Fig. 1; Fig. 8 a structural diagram of a support layer in Fig. 7; Fig. 9 another cross section along the section line BB' in Fig. 1; Fig. 10 a structural diagram of a support layer in Fig. 9; Fig. 11 an enlarged view of area C in Fig. 10; Fig. 12A another cross section along the section line BB' in Fig. 1; Fig. 12B is a diagram showing a stress simulation analysis of the display device according to Fig. 12A shows; Fig. 13 another cross section along the section line BB' in Fig. 1; Fig. 14 another cross section along the section line BB' in Fig. 1; Fig. 15 another cross section along the section line BB' in Fig. 1; Fig. 16 another cross section along the section line BB' in Fig. 1; and Fig. 17 another cross section along the section line BB' in Fig. 1. DETAILED DESCRIPTION OF REVELATION

[0025] The technical solutions in some embodiments of the present disclosure will be described clearly and completely below with reference to the accompanying drawings. However, the described embodiments are only some, but not all, of the embodiments of the present disclosure. All other embodiments that a person of ordinary skill in the art can derive from the embodiments of the present disclosure are within the scope of the present disclosure.

[0026] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and other forms thereof, such as the third-person singular "comprises" and the present participle form "comprising," are construed in an open and inclusive sense, i.e., "including, but not limited to." In describing the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example," or "some examples" are intended to indicate that certain features, structures, materials, or properties related to the embodiment(s) or example(s) are included in at least one embodiment or example of the present disclosure. Schematic representations of the above terms do not necessarily refer to the same embodiment(s) or example(s).Moreover, certain features, structures, materials, or properties may be appropriately included in any one or more embodiments or examples.

[0027] Hereinafter, terms such as "first" and "second" are used for descriptive purposes only, but should not be understood to indicate or imply the relative importance or implicit number of the specified technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly encompass one or more of the features. In the description of the embodiments of the present disclosure, the terms "a plurality of," "the plurality of," and "multiple" each mean two or more, unless otherwise specified.

[0028] In the description of some embodiments, the terms "electrically connected" and "connected," and their derivatives, may be used. For example, the term "electrically connected" may be used in the description of some embodiments to indicate that two or more components are in direct physical or electrical contact with each other. The embodiments disclosed herein are not necessarily limited to the content described herein.

[0029] The phrase "at least one of A, B, and C" has the same meaning as the phrase "at least one of A, B, or C," and both include the following combinations of A, B, and C: A only, B only, C only, a combination of A and B, a combination of A and C, a combination of B and C, and a combination of A, B, and C.

[0030] The phrase “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0031] As used herein, the term "approximate," "substantially," or "approximately" includes a stated value and an average value within an acceptable range of deviation from a specified value. The acceptable range of deviation is determined by a person skilled in the art, taking into account the measurement in question and the errors inherent in measuring a particular quantity (i.e., the limitations of a measurement system).

[0032] In describing the present disclosure, it is assumed that orientations or relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "vertical", "horizontal", "inside", "outside" are based on orientations or relationship shown in the drawings, which is merely for the convenience of describing the present disclosure and simplifying the description, but does not imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limitations on the present disclosure.

[0033] When reference is made to a layer or element on top of another layer or substrate, the layer or element may be located directly on the other layer or substrate, or there may be one or more intermediate layers between the layer or element and the other layer or substrate.

[0034] Example embodiments are described herein with reference to sectional views and / or plan views as idealized example drawings. In the accompanying drawings, layer thicknesses and areas of regions are shown enlarged for clarity. Deviations in shape from the accompanying drawings, e.g., due to manufacturing technologies and / or tolerances, are conceivable. Therefore, the example embodiments should not be understood as being limited to the shapes of the regions shown here, but as also including deviations in shape that are, e.g., due to manufacturing. For example, an etched region shown in a rectangular shape generally has a curved feature.Therefore, the regions shown in the accompanying drawings are schematic and their shapes are not intended to show the actual shapes of regions in a device and are not intended to limit the scope of the exemplary embodiments.

[0035] Fig. 1 is a plan view of a display device provided in some embodiments of the present disclosure. The display device 1000 may be any device capable of displaying images in motion (e.g., a video) or stationary (e.g., a still image), and independent of text or images. In particular, it is contemplated that the embodiments may be implemented in or connected to a variety of electronic devices. The variety of electronic devices may include, for example, cellular phones, wireless devices, personal data assistants (PDAs), portable computers, GPS receivers / navigators, cameras, MP4 video players, video cameras, game consoles, wristwatches, clocks, calculators, television monitors, flat panel displays, computer monitors, vehicle-mounted displays (such as odometer displays, etc.), navigation devices, cockpit controls and / or cockpit displays, camera-view displays (e.g.,Rearview camera displays in vehicles), electronic photographs, electronic billboards or displays, projectors, building structures, packaging and aesthetic structures (e.g., a display for an image of a piece of jewelry), etc. Fig. 1 shows the display device 1000 as an example for a mobile phone.

[0036] The display device 1000 may be a curved display device, a foldable display device, or a rollable display device.

[0037] As in Fig. 2 and Fig. 3, the display device 1000 includes a main display area A1 and a curved display area A2, wherein the curved display area A2 is a bent, rolled, or folded portion of the display device 1000.

[0038] The display device 1000 may, for example, be a display device that has a curved surface on at least one side. The curved display area A2 may, for example, be located on one or more sides (left, right, top, or bottom) of the main display area A1, which is not particularly limited here.

[0039] As in Fig. 2, the display device 1000 may be, for example, a display device having curved surfaces on all sides, and the curved display area A2 is arranged around the main display area A1.

[0040] Optionally, the display device 1000 may be a foldable display device. As shown in Fig. 3, for example, the curved display area A2 is located on one side of the main display area A1 after the display device 1000 is rotated along the axis Li in Fig. 1 was folded.

[0041] For example, an outline of the display device 1000 is substantially rectangular. Note that the term "substantially rectangular" means that the outline of the display device 1000 has the shape of a rectangle as a whole, but is not limited to a standard rectangle. That is, a meaning range of the term "rectangle" herein includes not only a substantial rectangle, but also a shape similar to the rectangle taking process conditions into account. For example, the long and short sides of the rectangle are curved at each intersection position (i.e., at the corners), i.e., the corners are smooth, so that the outline of the display device 1000 has the shape of a rounded rectangle in plan view.

[0042] As in Fig. 4, the display device 1000 includes a display module 100 and an encapsulation assembly 200. The encapsulation assembly 200 is arranged on one side of the display module 100.

[0043] In some embodiments, the encapsulation assembly 200 includes a polarizer 201, a viscose layer 202, and a cover plate 203.

[0044] The polarizer 201 is arranged on a display side surface (i.e., the surface of the side where the light-emitting display is performed) of the display module 100 and corresponds at least to the main display area A1. The polarizer 201 can reduce light reflection from the display side surface of the display module 100 and improve display contrast of the display device 1000.

[0045] The cover plate 203 is arranged on the side of the polarizer 201 facing away from the display module 100 and serves to protect the display module 100.

[0046] Between the polarizer 201 and the cover plate 203 is the viscose layer 202, which serves to glue the polarizer 201 to the cover plate 203.

[0047] In some embodiments relating to Fig. 4, the display device 1000 further includes a display driver chip 300 and a flexible printed circuit board 400.

[0048] The display driver chip 300 is disposed on a side of the display module 100 facing away from the encapsulation assembly 200 and is electrically connected to the display module 100; the flexible circuit board 400 is disposed on the side of the display module 100 facing away from the encapsulation assembly 200 and is electrically connected to the display module 100. The display driver chip 300 and the flexible circuit board 400 are used to supply the display module 100 with data signals required for displaying images.

[0049] Optionally, the display device may also include a housing.

[0050] In some embodiments, as in Fig. 5, the display device 1000 further includes an optical device 30 arranged on a non-display side (a side opposite the display side) of the display module 100.

[0051] By providing the optical device 30 on the non-display side of the display module 100, the optical device 30 is prevented from occupying the display side of the display module 100, thereby achieving maximum utilization of a display area of ​​the display module 100 and achieving a full-screen design of the display device 1000.

[0052] For example, the display device 1000 includes a light-shielding layer covering the optical device 30 (see Fig. 16) to prevent ambient light from interfering with the optical device 30 and to improve the operating efficiency of the optical device 30.

[0053] As in Fig. 5, the prior art display module 100 comprises a display panel 10 and a support layer 20' disposed on one side of the display panel 10.

[0054] The support layer 20' corresponds to the main display area A1 and the curved display area A2. That is, before the display panel 10 is bent to form a curved surface, an orthographic projection of the support layer 20' is located on the display panel 10 in both the main display area A1 and the curved display area A2. The display panel 10, the viscose layer 202, and the cover plate 203 are all flexible structures, and the support layer 20' is configured to provide rigid support for the flexible structures to prevent undesirable deformation generated in the flexible structures and ensure that the display panel 10 is able to have and maintain a specific shape. The support layer 20' can be made of, for example, a SUS304 steel sheet.

[0055] The optical device 30 is, for example, an optical fingerprint identification device. In the prior art, the optical fingerprint identification device (optical device 30) is provided below the screen, that is, on the non-display side of the display panel 10. When fingerprint recognition is performed, light emitted from the display panel 10 is irradiated onto a finger on the display side surface of the display panel 10, and the light is reflected to form a backlight carrying fingerprint information. The backlight passes through the display panel 10 and is irradiated onto the optical fingerprint identification device to perform fingerprint identification recognition.

[0056] The inventors of the present disclosure have found that in a case where the display device 1000 is a curved display device, particularly in a case where the display device 1000 is a foldable display device, the support layer 20' needs to provide a certain support force, and therefore, the material thereof is a rigid material such as stainless steel, and the light transmittance is poor. In a case where the optical device 30 is arranged below the display screen, it is difficult for the returning light to penetrate the support layer 20', resulting in it being difficult for the optical device 30 to collect information about sufficient returning light. As a result, the function of the optical device 30 is implemented with poor results. For example, the fingerprint identification device has low accuracy and speed of fingerprint identification.

[0057] To solve the above problems, as in Fig. 6, embodiments of the present disclosure provide a display module 100 including a display panel 10 and a support layer 20.

[0058] The display panel 10 can be a liquid crystal display panel or a photoluminescent display panel. If the display panel 10 is an electroluminescent display panel, the electroluminescent display panel can be an organic electroluminescent display panel (OLED, organic light-emitting diode) or a quantum dot electroluminescent display panel (QLED, quantum dot light-emitting diode). If the display panel 10 is a photoluminescent display panel, the photoluminescent display device can be a quantum dot photoluminescent display device.

[0059] The display panel 10 has a display side and a non-display side, wherein the display side is a side of the display panel 10 on which images are displayed, and the non-display side is a side of the display panel 10 facing away from the display side.

[0060] As in Fig. As shown in Figure 6, the support layer 20 is arranged on the non-display side of the display panel 10. The support layer 20 includes a support plate 21 and a first support portion 22 connected to the support plate 21. The support plate 21 is provided with a first hole K1, and the first support portion 22 is arranged in the first hole K1.

[0061] For example, the first hole K1 has the shape of a circle, an ellipse or a polygon in plan view.

[0062] As in Fig. As shown in Figure 6, a side surface of the support plate 21 near the display panel 10 is substantially flush with a side surface of the first support portion 22 near the display panel 10. That is, a side surface of the support layer 20 near the display panel 10 is substantially on the same plane as a whole, so that the support layer 20 can provide uniform support for each area of ​​the display panel 10, and the display panel 10 is prevented from being dented or protruded due to unevenness of the support layer 20. In this way, the yield of the display device 1000 is prevented from being affected.

[0063] The thickness of the support layer 20 is in a range of about 10 µm to about 200 µm, such as 10 µm, 18 µm, 30 µm, 40.5 µm, 60.78 µm, 80 µm, 92 µm, 100 µm, 135.5 µm, 178 µm or 200 µm.

[0064] By controlling the thickness of the support layer 20 in the range of about 10 μm to about 200 μm, the support layer 20 can provide sufficient support force for the flexible structures in the display device 1000, and moreover, the increase in the overall thickness of the display module 100 and even the display device 1000 is avoided, which is advantageous for realizing the light and thin design of the display device 1000.

[0065] For example, a material of the support plate 21 is a rigid material, e.g., the material of the support plate 21 is stainless steel. In this case, the support plate 21 is configured to provide rigid support for the flexible structures in the display device 1000, thereby ensuring that the display device 1000 can form and maintain a specific shape.

[0066] The material of the support plate 21 is, for example, copper, silver, steel, aluminum, or an aluminum alloy, which has strong heat dissipation capability. In this case, the support plate 21 is configured to dissipate the heat of the display device 1000 as a heat dissipation film layer.

[0067] At least a portion of the first support section 22 is translucent. The first support section 22 also has a certain supporting force, for example.

[0068] For example, the light transmittance of the first support portion 22 is greater than or equal to 65%. The light transmittance of the first support portion 22 is, for example, 65%, 70%, 72%, 80%, 90%, 93%, or the like.

[0069] By setting the light transmittance of the first support portion 22 to more than or equal to 65%, the first support portion 22 can provide a light transmission channel for the optical device 30 while satisfying the supporting force and preventing the display panel 10 from sinking at the first hole K1.

[0070] As in Fig. 6, the optical device 30 is arranged, for example, on a side of the first support portion 22 facing away from the display panel 10. An orthographic projection of the optical device 30 on the display panel 10 is located in a region of an orthographic projection of the first support portion 22 on the display panel 10. That is, the optical device 30 and the first support portion 22 overlap each other in a thickness direction of the display panel 10.

[0071] The orthographic projection of the optical device 30 on the display panel 10 is located, for example, in the area of ​​the orthographic projection of the first support section 22 on the display panel 10.

[0072] It should be noted that the optical device 30 may be a device capable of realizing a specific function using an optical sensor, such as an under-screen camera, a fingerprint identification device, a 3D face identification device, an iris identification device, a proximity sensor, or the like.

[0073] In the display module 100 provided by the embodiments of the present disclosure, by providing the support plate 21 and the light-transmitting first support portion 22, the support layer 20 can fulfill the supporting function to the flexible structures (e.g., the display panel 10, the viscose layer 202, the cover plate 203, and the like) in the display device 1000, and the light transmittance of the support layer 20 at a position corresponding to the optical device 30 can be increased, so that the optical device 30 can penetrate the support layer 20, and then the returning light can effectively reach the display side surface of the display panel 10, which ensures that the optical device 30 can effectively realize its specific function. In this way, the optical device 30, such asan optical fingerprint identification device, can be effectively applied to a flexible display device, and in particular, it can be applied to a foldable display device with a large support requirement on the support layer 20, so that the application scenarios of the optical device 30 are expanded.

[0074] In exemplary embodiments, as in Fig. 4, the display module 100 further comprises a backsheet 40.

[0075] The backsheet 40 is disposed on a side of the display panel 10 facing away from the encapsulation assembly 200. The backsheet 40 is used to protect the non-display side of the display panel 10. In addition, the backsheet 40 provides a certain supporting force for bending the display panel 10, thus preventing cracking caused by uneven stress when the display panel 10 is bent.

[0076] As in Fig. As shown in Figure 4, the backsheet 40 may, for example, comprise two separate parts, wherein a part of the backsheet 40 can be bent with the display panel 10. In this case, no material of the backsheet 40 is located between the two separate parts, so that a bent portion of the display panel 10 is exposed and the bending resistance of the bent portion of the display panel 10 can be reduced.

[0077] The back sheet 40, for example, is made of a flexible material.

[0078] The material of the backsheet 40 can be, for example, a polyterephthalate plastic, such as polyethylene terephthalate (PET). The material of the backsheet 40 can also be polyimide (PI) or cycloolefin polymers (COP).

[0079] In exemplary embodiments, as in Fig. 4, the display module 100 further includes a curved layer 40A.

[0080] The curved layer 40A is arranged on a side of the backsheet 40 facing away from the display panel 10. The curved layer 40A has a preset curvature and serves as a reference for the bending angles of other structural layers (the display panel 10 and the encapsulation assembly 200) of the display module 100.

[0081] In some embodiments, as in Fig. As shown in Figure 6, the first support portion 22 is disposed in the first opening K1, and the first support portion 22 is made of a transparent material. A side wall of the first support portion 22 in a direction perpendicular to the display panel 10 is fixedly connected to a hole wall of the first hole K1.

[0082] As in Fig. 6, the first support section 22, for example, fills the entire first hole K1.

[0083] For example, the first support section 22 has a certain supporting force.

[0084] For example, a side surface of the first support portion 22 close to the display panel 10 is located on the same plane as a side surface of the support plate 21 close to the display panel 10, and a side surface of the first support portion 22 remote from the display panel 10 is located on the same plane as a side surface of the support plate 21 remote from the display panel 10. It is possible to avoid a situation in which the display side surface of the display panel 10 is convex or concave because the first support portion 22 is raised or lowered relative to the support plate 21.

[0085] For example, an orthographic projection of the optical device 30 on the display panel 10 is located in a range of an orthographic projection of the first hole K1 on the display panel 10. For example, the diameter of the first hole K1 is larger than the maximum dimension of the optical device 30 in a direction parallel to the display side surface of the display panel 10. For example, a difference between the diameter of the first hole K1 and a dimension of the optical device 30 in the direction parallel to the display side surface of the display panel 10 is greater than or equal to 0.2 mm.

[0086] For example, the orthographic projection of the optical device 30 on the display panel 10 is within the range of the orthographic projection of the first support portion K1 on the display panel 10. That is, the first support portion 22 corresponds to the light-emitting device 30 in the thickness direction of the display panel 10, and the orthographic projection of the light-emitting device 30 on the display panel 10 is within the range of the orthographic projection of the first support portion 22 on the display panel 10. It can be ensured that the returning light can penetrate the support layer 20 to the maximum, thereby improving the sensitivity and accuracy of the optical device 30.

[0087] By providing the first hole K1 at a position corresponding to the optical device 30 in the support plate 21 and by providing the light-transmitting first support portion 22 in the first hole K1, the returning light can penetrate through the support layer 20, the effect of collecting the information by the optical device 30 is effectively improved, and the optical device 30 can be effectively applied to a flexible display device, such as a foldable display device, without impairing the functional realization effect thereof. In addition, the first support portion 22 has a certain supporting force, so that the flexible structures (e.g.the display panel 10, the viscose layer 202, the cover plate 203, and the like) of the flexible display device are recessed toward the first hole K1 due to local poor supporting performance of the supporting layer 20 caused by the setting of the first hole K1, so that a bad phenomenon such as concavity on the display side of the display panel 10 can be avoided.

[0088] The first support section 22 has, for example, at least one of the following three features.

[0089] A first feature is that the material of the first support portion 22 may comprise ultra-thin flexible glass (UTG). Alternatively, the material of the first support portion 22 may comprise polymethyl methacrylate (PMMA). The thickness of the ultra-thin flexible glass may be less than or equal to 50 µm, for example, 10 µm, 30 µm, 35 µm, or 45.8 µm. UTG or PMMA as the first support portion 22 can meet both the light transmittance and support force requirements of the support layer 20.

[0090] A second feature is that the light transmittance of the first support portion 22 is greater than or equal to 90%. For example, the light transmittance of the first support portion 22 is 90.1%, 92%, 92.55%, 95%, or 98%. Therefore, the light transmittance requirement of the optical device 30 of the support layer 20 can be met in a case where the optical device 30 is arranged under the display screen, and the operating efficiency of the optical device 30 is improved.

[0091] A third feature is that the elastic modulus of the first support portion 22 is greater than or equal to 3 Gpa. For example, the elastic modulus of the first support portion 22 is 3.5 Gpa, 3.51 Gpa, 3.513 Gpa, 3.6 Gpa, 4 Gpa, or 5 Gpa. In this way, a certain supporting force is provided, and the problem of the display panel 10 sinking at the first hole K1 due to insufficient supporting force is avoided.

[0092] By having the first support portion 22 with a certain light transmittance and satisfying a certain elastic modulus, the first support portion 22 can provide a certain supporting force and also satisfy the light transmittance required by the optical device 30, so that the optical device 30, for example, an optical fingerprint identification device, can be effectively applied to a flexible display device, thereby improving the situation that the optical device 30 cannot be applied to a foldable display device or cannot be efficiently applied to the foldable display device.

[0093] In exemplary embodiments, as in Fig. 7 and Fig. 8, the support layer 20 further comprises an adhesive portion 23.

[0094] The adhesive portion 23 is arranged between the first support portion 22 and the hole wall of the first hole K1, and the support plate 21 and the first support portion 22 are connected by the adhesive portion 23.

[0095] By setting the adhesive portion 23 between the first support portion 22 and the hole wall of the first hole K1, the first support portion 22 is firmly fixed in the first hole K1, and the defect that the display side of the display panel 10 is convex or concave because the first support portion 22 is closer to the display panel 10 or farther away from the display panel than the support plate 21 under the action of an external force is avoided.

[0096] A material of the adhesive portion 23 is, for example, a light-shielding material. The adhesive portion 23 consists, for example, of a black, non-transparent material.

[0097] By providing the light-shielding material as the adhesive portion 23, the interference of ambient light to the optical device 30 is reduced and the accuracy of the information detected by the optical device 30 is improved.

[0098] For example, an orthographic projection of the adhesive portion 23 on the display panel 10 and an orthographic projection of the optical device 30 on the display panel 10 are offset from each other. That is, the adhesive portion 23 and the optical device 30 are offset from each other in the thickness direction of the display panel 10, thereby preventing the adhesive portion 23 from blocking the light emission and collection of the optical device 30 and improving the accuracy and speed of the functional realization of the optical device 30.

[0099] The adhesive section 23 has, for example, at least one of the following two features.

[0100] A first feature is that the material of the adhesive portion 23 comprises a one-component epoxy adhesive.

[0101] A second feature is that the viscosity of the adhesive portion 23 ranges from 10,000 cP to 20,000 cP. For example, the viscosity of the adhesive portion 23 is 10,000 cP, 12,000 cP, 15,300 cP, or 20,000 cP.

[0102] By controlling the viscosity of the adhesive portion 23 in the range of 10000 cP to 20000 cP, it is possible to ensure the adhesive strength of the adhesive portion 23 while reducing the flowability of the adhesive portion 23, thereby preventing overflow of the adhesive portion 23 during the bonding process.

[0103] As in Fig. 7 and Fig. As shown in Figure 8, the distance L1 between the first support portion 22 and the hole wall of the first hole K1 is in a range of 15 µm to 500 µm. That is, the thickness (dimension in a direction perpendicular to the inner hole wall of the first hole K1) of the adhesive portion 23 is in a range of 15 µm to 500 µm. For example, the thickness of the adhesive portion 23 is 15 µm, 20 µm, 50 µm, 75 µm, 100 µm, 172.5 µm, 200 µm, 350 µm, or 500 µm.

[0104] By adjusting the material, viscosity, dimension, and the like of the adhesive portion 23, the first support portion 23 is stably disposed in the first hole K1 so that the side surface of the first support portion 23 near the display panel 10 and the side surface of the support plate 21 near the display panel 10 are on the same plane, and the side surface of the first support portion 23 far from the display panel 10 and the side surface of the support plate 21 far from the display panel 10 are on the same plane. In this way, situations involving concavity or convexity and the like on the display side surface of the display panel 10 are avoided.

[0105] In some embodiments, as in Fig. As shown in Figure 9, the first support portion 22 includes a plurality of support strips 22A, at least two of which are connected to the hole wall of the first hole K1. The plurality of support strips 22A and the hole wall of the first hole K1 define a plurality of second holes K2. At least a portion of the hole wall of the first hole K1 serves as the wall of the second holes K2.

[0106] For example, the plurality of support strips 22A are fixedly connected to the support plate 21 or formed integrally therewith.

[0107] For example, the thickness (dimension in the direction perpendicular to the display side surface of the display panel 10) of the support strip 22A is substantially equal to the thickness (dimension in the direction perpendicular to the display side surface of the display panel 10) of the support plate 21.

[0108] For example, a side surface of the support strip 22A close to the display panel 10 lies in the same plane as the side surface of the support plate 21 close to the display panel 10, and a side surface of the support strip 22A remote from the display panel 10 lies in the same plane as the side surface of the support plate 21 remote from the display panel 10. It is possible to avoid a situation in which the support strip 22A is raised or lowered with respect to the support plate 21, thereby avoiding a situation in which the display side surface of the display panel 10 is convex or concave.

[0109] For example, two adjacent second holes K2 are provided with a support strip 22A therebetween.

[0110] An orthographic projection of the second hole K2 on the display field 10 has, for example, the shape of a regular polygon, a circle or an ellipse.

[0111] For example, an area of ​​an orthographic projection of each second hole K2 on the display panel 10 is less than or equal to 0.2 times the orthographic projection of the optical device 30 on the display panel 10. That is, the optical device 30 corresponds to the plurality of second holes K2 each having a smaller size than that of the optical device 30.

[0112] The plurality of second holes K2 having the small size can prevent the flexible structures of the display device 1000 from sinking, and furthermore, the plurality of second holes K2 can ensure that the support layer 20 has a certain light transmittance, thereby improving the applicability of the optical device 30 in the flexible display device.

[0113] The orthographic projection of the optical device 30 on the display panel 10 is located in a range where orthographic projections of the plurality of second holes K2 on the display panel 10 are located, so that the returning light can maximally penetrate the support layer 20 through the plurality of second holes K2, thereby improving the sensitivity and accuracy of the optical device 30.

[0114] For example, the total light transmittance of the first support portion 22 having the plurality of second holes K2 is substantially greater than or equal to 65%.

[0115] As in Fig. For example, as shown in Figure 10, the plurality of support strips 22A and the hole wall of the first hole K1 are connected to each other to form a honeycomb structure or a lattice structure. The honeycomb structure or lattice structure can support the flexible structures of the display device 1000 to provide a certain support force for the flexible structures and effectively prevent undesirable deformations generated in the flexible structures, for example, preventing the concavity generated by the display side surface of the display panel 10 at the position corresponding to the light-emitting device 30 due to the recess of the flexible structures.

[0116] By designing such that at least two of the plurality of support strips 22A of the first support portion 22 are connected to the hole wall of the first hole K1, the plurality of support strips 22A and the hole wall of the first hole K1 can define the plurality of second holes K2. After the optical device 30 has been provided, in a case where the orthographic projection of the optical device 30 on the display panel 10 lies in the range in which the orthographic projection of the plurality of second holes K2 on the display panel 10 is located, the first support portion 22 can be designed in a lattice-like manner. Openings in the lattice-like first support portion 22, i.e., the second holes K2, provide the optical device 30 with light transmission channels, thereby increasing the light transmittance of the support layer 20 and improving the applicability of the optical device 30 in the flexible display device. In addition, ribs (i.e.,the support strips 22A) in the lattice-like first support portion 22 provide a certain support force to prevent deformation of the flexible structures in the display device 1000 at the position corresponding to the optical device 30, such as sagging, which leads to undesirable phenomena such as the concavity of the display side surface of the display panel 10.

[0117] Therefore, the display module 100 provided by embodiments of the present disclosure can both improve the applicability of the optical device 30 in a flexible display device and ensure the original structural properties of the flexible display device, thereby avoiding deformation of the flexible structures in the flexible display device due to the adjustment of the optical device 30.

[0118] For example, the second hole K2 may be filled with UTG material or PMMA material, so that in a case where the light transmittance is satisfied, the supporting force of the first supporting portion 22 can be further increased and the strength of the supporting layer 20 can be further increased.

[0119] In exemplary embodiments, as in Fig. 11, the display panel 10 comprises a plurality of subpixels P.

[0120] For example, the plurality of subpixels P are arranged in an array, and the subpixels P are capable of emitting colored light, and each subpixel P has a corresponding light-emitting region P' from which the colored light emitted by the subpixel P is emitted.

[0121] Orthographic projections of the support stripes 22A on the display panel 10 are offset from each other with the light-emitting regions P' of the subpixels P. For example, a support stripe 22A is arranged between light-emitting regions P' of two adjacent subpixels P to avoid blocking the emission path of the color light of the subpixels P after the light-emitting regions P' are shielded by the support stripe 22A, thereby avoiding reducing the light-emitting effect of the display device 1000.

[0122] For example, a width L2 of the support stripe 22A is less than or equal to a distance L3 between the light-emitting regions P' of the two adjacent sub-pixels P, thereby preventing the support stripe 22A from shielding the light-emitting regions P' of the sub-pixels P and reducing the light-emitting effect of the display device 1000.

[0123] For example, when the distance L3 between the light-emitting regions P' of the two adjacent subpixels P is substantially 50 µm, the width L2 of the support stripe 22A is substantially less than or equal to 520 µm.

[0124] For example, the area of ​​a second hole K2 is greater than or equal to the area of ​​a light-emitting region P' of a subpixel P.

[0125] For example, the light-emitting region P' is set to correspond to, for example, the position of the second hole K2, so that the orthographic projections of the light-emitting regions P' of the sub-pixel P on the display panel 10 are within the range of the orthographic projections of the second holes K2 on the display panel 10, thereby ensuring that the color light emitted from the sub-pixels P corresponding to the first support portion 22 can be fully emitted onto the display panel 10, and avoiding the reduction of the light-emitting effect of the display device 1000.

[0126] In exemplary embodiments, as in Fig. 11, the plurality of second holes K2 includes a center hole K21 and a plurality of edge holes K22 evenly arranged around the center hole K21.

[0127] As in Fig. For example, as shown in Figure 11, the second hole K2 has a regular hexagonal shape, and the plurality of second holes K2 includes a center hole K21 and six peripheral holes K22 evenly arranged around the center hole K21. Opposite edges of two adjacent second holes K2 are arranged parallel to each other, so that the plurality of second holes K2 are evenly distributed. This contributes to the even distribution of the compressive force during fingerprint verification.

[0128] The support layer 20 can be arranged in a foldable display device, and a plurality of second holes K2, each having a regular hexagonal shape, are formed in the first support portion 22. Through simulation tests, pressure is applied to the area around the second holes K2 under the pressure condition of 600 g for 10 s, and the deflection is 0.2 mm, which can meet the requirements of the display device 1000 for a fingerprint sensor.

[0129] In some embodiments, as in Fig. 12A, the display module 100 further comprises a buffer layer 50 arranged on a side of the support layer 20 close to the display panel 10.

[0130] One material of the buffer layer 50 is, for example, foam.

[0131] The buffer layer 50 is configured to absorb stress and external shock applied to the display panel 10 during assembly and subsequent use to effectively protect the display panel 10 and other components.

[0132] The buffer layer 50 includes a second support portion 50A. The second support portion 50A is translucent.

[0133] For example, an orthographic projection of the optical device 30 on the display panel 10 is located in a range of an orthographic projection of the second support portion 50A on the display panel 10. That is, a portion (ie, the second support portion 50A) of the buffer layer 50 corresponding to the optical device 30 is made of a transparent material, so that the buffer layer 50 is prevented from shielding the returning light, the optical device 30 can effectively realize its specific function, and the applicability of the optical device 30 in the flexible display device is further improved.Furthermore, the arrangement of a position where the optical device 30 is arranged is expanded, for example, the optical device 30 can be arranged even in a region where the buffer layer 50 is arranged in the display device 1000, so that the optical device 30 can be arranged at any position on the entire screen of the display device 1000.

[0134] An orthographic projection of the second support portion 50A on the display panel 10 at least partially overlaps with an orthographic projection of the first support portion 22 on the display panel 10. Moreover, the orthographic projection of the optical device 30 on the display panel 10 is located in a region of a portion where the orthographic projection of the second support portion 50A on the display panel 10 and the orthographic projection of the first support portion 22 on the display panel 10 overlap each other, so that the optical device 30 can effectively penetrate the support layer 20 and the buffer layer 50, the support layer 20 and the buffer layer 50 are prevented from shielding the returning light, and the efficiency of the optical device 30 is improved.

[0135] In exemplary embodiments, as in Fig. 12A and Fig. As shown in Figure 13, the entire buffer layer 50 is made of a transparent material. That is, the buffer layer 50 serves as the second support portion 50A in its entirety.

[0136] For example, the buffer layer 50 is provided with an adhesive layer on both sides near and away from the display panel 10.

[0137] For example, the buffer layer 50 has at least one of the following four features.

[0138] A first feature is that a material of the buffer layer 50 comprises thermoplastic polyurethane elastomer rubber (TPU, Thermoplastic Polyurethanes), which can satisfy both a certain light transmittance and a certain supporting force.

[0139] A second feature is that the light transmittance of the buffer layer 50 is greater than or equal to 92%. For example, the light transmittance of the buffer layer 50 is 92%, 93%, 93.5%, 94%, or 98%. By setting the light transmittance of the buffer layer 50 to greater than or equal to 92%, the buffer layer 50 can provide a light transmission channel for the optical device 30, and the problem of reducing the effectiveness of the optical device 30 due to the buffer layer 50 shielding the optical device 30 is avoided.

[0140] A third feature is that the elastic modulus of the buffer layer 50 is in a range of 0.1 Gpa to 0.15 Gpa. For example, the elastic modulus of the buffer layer 50 is 0.1 Gpa, 0.101 Gpa, 0.12 Gpa, 0.125 Gpa, 0.14 Gpa, or 0.15 Gpa. The elastic modulus of the buffer layer 50 is controlled to be in the range of 0.1 Gpa to 0.15 Gpa, so that the buffer layer 50 can absorb stress and external forces on the display panel 10 during the assembly process and the subsequent use process, and effectively protect the display panel 10 and other components. In addition, the buffer layer 50 can have a certain supporting force, which is advantageous for implementing the folding design of the display device 1000.

[0141] A fourth feature is that the thickness of the buffer layer 50 (a dimension thereof in a direction perpendicular to the display side of the display panel 10) is in a range of 0.1 mm to 0.12 mm. For example, the thickness of the buffer layer 50 is 0.1 mm, 0.102 mm, 0.11 mm, or 0.12 mm, thereby ensuring the buffering effect of the buffer layer 50.

[0142] By making the entire buffer layer 50 of transparent material, it can meet the requirements of the optical device 30 for the light transmittance of the buffer layer 50; and by making the buffer layer 50 have a certain elasticity, such as a Young's modulus of 0.15 GPa, to maintain the role of the buffer layer 50 in absorbing stress and to ensure that the buffer layer 50 has a protective effect on the display panel 10 and other structures.

[0143] With reference to the Fig. 12B, taking the optical device 30 as an optical fingerprint identification device as an example, a stress analysis is carried out at a position corresponding to the optical device 30 in the display device 1000 in Fig. 12A corresponds, as in Fig. 12B, a stress applied to the display device 1000 is evenly dispersed from a force application center a of a finger (ie, a center where the optical device 30 is located) to an edge b of the display device 1000, and a supporting effect is good.

[0144] In exemplary embodiments, as in Fig. As shown in Figure 14, the buffer layer 50 is provided with a third hole K3. The second support portion 50A is arranged in the third hole K3.

[0145] A part of the buffer layer 50, except for the second support portion 50A, is made of foam, for example.

[0146] A light-transmitting member (ie, the second support portion 50A) having a supporting force is disposed in the third hole K3 to provide a certain supporting force for the flexible member of the display device 1000 while ensuring the light transmittance requirement of the optical device 30 for the buffer layer 50, and also to provide a certain buffer capacity at the position of the third hole K3, thereby avoiding the damage of the display panel 10, the optical device 30, or other structures at the position of the third hole K3 due to the fact that the third hole K3 is provided and the position of the third hole K3 cannot absorb the external impact force.

[0147] An orthographic projection of the optical device 30 on the display panel 10 is located in a range of an orthographic projection of the second support portion 50A on the display panel 10, thereby ensuring that the returning light smoothly penetrates the buffer layer 50 and avoiding the problem that the buffer layer 50 blocks the light of the optical device 30 and thereby reduces the effectiveness of the optical device 30.

[0148] For example, the second support portion 50A has at least one of the following three features.

[0149] A first feature is that a material of the second support portion 50A comprises polyethylene terephthalate (PET). The second support portion 50A made of the PET material can meet the requirements of the buffer layer 50 for light transmittance, support force, and buffering effect.

[0150] A second feature is that the light transmittance of the second support portion 50A is greater than or equal to 90%. For example, the light transmittance of the second support portion 50A is 90%, 91%, 92.5%, 95%, or 98%. Therefore, in a case where the optical device 30 is arranged under the display screen, the light transmittance requirement of the buffer layer 50 can be met, and the effect of the optical device 30 is improved.

[0151] A third feature is that the elastic modulus of the second support portion 50A is in a range of 0.5 GPa to 1.5 GPa. For example, the elastic modulus of the second support portion 50A is 0.5 GPa, 0.65 GPa, 1 GPa, or 1.5 GPa to provide a certain supporting force and avoid the problem of the display panel 10 sinking at the third hole K3 due to insufficient supporting force; further, the buffer capacity of the second support portion 50A is maintained and the shock resistance of the buffer layer 50 is ensured.

[0152] For example, the elastic modulus of the second support portion 50A is substantially equal to the elastic modulus of the buffer layer 50, thereby ensuring that a film layer in which the buffer layer 50 is located has uniform impact resistance.

[0153] As in Fig. 14, for example, in a case where the support layer 20 includes the support plate 21 and the first support portion 22, the support plate 21 is provided with the first hole K1, and the first support portion 22 is provided in the first hole K1, an orthographic projection of the first hole K1 on the display panel 10 lies within a range of an orthographic projection of the third hole K3 on the display panel 10. For example, a radius of the third hole K3 is larger than a radius of the first hole K1. For example, a difference between the radius of the third hole K3 and the radius of the first hole K1 is greater than or equal to 0.2 mm. Therefore, it can be ensured that the returning light penetrates the buffer layer 50 to the maximum extent after passing through the support layer 20, and the efficiency of the optical device 30 can be improved.

[0154] In some embodiments, as in Fig. 15, the display module 100 further comprises an adhesive layer 60 arranged on a side of the buffer layer 50 close to the display panel 10.

[0155] The adhesive layer 60 is configured to fix the buffer layer 50 to one side of the display panel 10 and prevent the buffer layer 520 from falling off, thereby increasing the shock resistance of the buffer layer 50.

[0156] For example, the second support portion 50A is bonded to the adhesive layer 60. Therefore, the second support portion 50A is securely filled in the third hole K3, and the second support portion 50A is prevented from protruding or sinking relative to the buffer layer 50, so as to prevent the display side surface of the display panel 10 from generating unevenness such as warping or concavity.

[0157] In some embodiments, as in Fig. 16 and Fig. 17, a light-shielding layer 70 is disposed on a side of the support layer 20 facing away from the display panel 10 in the display module 100 and covers the optical device 30. The light-shielding layer 60 covers the optical device 30 to prevent ambient light from interfering with the optical device 30, thereby improving the effectiveness of the optical device 30.

[0158] In exemplary embodiments, as in Fig. 16, an orthographic projection of the first hole K1 in the support plate 21 of the support layer 20 on the display panel 10 is located in a range of an orthographic projection of the light-shielding layer 30 on the display panel 10. The light-shielding layer 60 covers the optical device 30 and also covers the first hole K1 in the support layer 20, so that it is ensured that all the light passing through the first hole K1 comes from the optical device 30, interference from ambient light on the optical device 30 is avoided, and the effectiveness of the optical device 30 is improved.

[0159] In exemplary embodiments, as in Fig.17, in a case where the first support portion 22 of the support layer 20 includes the plurality of second holes K2, the orthographic projections of the plurality of second holes K2 on the display panel 10 are within the range of the orthographic projection of the light-shielding layer 30 on the display panel 10. The light-shielding layer 60 covers the optical device 30 and also covers the second holes K2 in the buffer layer 50, so that it is ensured that all the light passing through the second holes K2 comes from the optical device 30, interference from ambient light on the optical device 30 is avoided, and the efficiency of the optical device 30 is improved.

[0160] The above descriptions merely illustrate specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto. Any modifications or substitutions that a person skilled in the art can conceive within the technical scope of the present disclosure are included within the scope of the present disclosure. Therefore, the scope of the present disclosure is subject to the scope of the claims.

Claims

[1] Display module, comprising: a display field; and a support layer disposed on a non-display side of the display panel, the support layer comprising a support plate and a first support portion connected to the support plate; wherein the support plate is provided with a first hole, and the first support portion is arranged in the first hole; and at least a part of the first support portion is translucent; a side surface of the support plate near the display panel is substantially flush with a side surface of the first support portion near the display panel; and the thickness of the support layer is in a range of about 10 µm to about 200 µm. [2] The display module according to claim 1, wherein the entire first support portion is made of a transparent material, and a side wall of the first support portion is fixedly connected to a hole wall of the first hole in a direction perpendicular to the display panel. [3] The display module according to claim 1 or 2, wherein a material of the first support portion comprises ultra-thin flexible glass or polymethyl methacrylate; and / or a light transmittance of the first support portion is greater than or equal to 90%; and / or an elastic modulus of the first support portion is greater than or equal to 3 Gpa. [4] The display module according to claim 2 or 3, wherein the support layer further comprises an adhesive portion, the adhesive portion being disposed between the first support portion and the hole wall of the first hole, and the support plate and the first support portion being connected by the adhesive portion. [5] The display module according to claim 4, wherein a material of the adhesive portion comprises a light-shielding material. [6] The display module according to claim 4 or 5, wherein a material of the adhesive portion comprises a one-component epoxy adhesive; and / or a viscosity of the adhesive portion is in a range of 10,000 cP to 20,000 cP; and / or a distance between the first support portion and the hole wall of the first hole is in a range of 15 µm to 500 µm. [7] The display module of claim 1, wherein the first support portion comprises a plurality of support strips, and at least two of the plurality of support strips are connected to a hole wall of the first hole; and the plurality of support strips and the hole wall of the first hole define a plurality of second holes. [8] The display module according to claim 7, wherein the plurality of support strips and the hole wall of the first hole are connected to form a honeycomb structure or a lattice structure. [9] A display module according to claim 7 or 8, wherein an orthographic projection of a second hole on the display panel has the shape of a regular polygon, a circle or an ellipse. [10] The display module of any one of claims 7 to 9, wherein the display panel comprises a plurality of subpixels, and orthographic projections of the plurality of support stripes on the display panel are staggered with light-emitting regions of the plurality of subpixels. [11] The display module according to claim 10, wherein a width of a support strip is less than or equal to a distance between light-emitting regions of two adjacent subpixels; and / or an area of ​​the one second hole is greater than or equal to an area of ​​a light-emitting region of the one subpixel. [12] Display module according to one of claims 1 to 11, further comprising: a buffer layer disposed on a side of the support layer near the display panel, the buffer layer comprising a second support portion that is light-transmissive. [13] The display module according to claim 12, wherein the entire buffer layer is made of a transparent material. [14] The display module according to claim 13, wherein a material of the buffer layer comprises thermoplastic polyurethane elastomer rubber; and / or a light transmittance of the buffer layer is greater than or equal to 92%; and / or an elastic modulus of the buffer layer is in a range of 0.1 Gpa to 0.15 Gpa. [15] The display module according to claim 12, wherein the buffer layer is provided with a third hole, and the second support portion is arranged in the third hole. [16] The display module according to claim 15, wherein a material of the second support portion comprises polyethylene terephthalate; and / or a light transmittance of the second support portion is greater than or equal to 90%; and / or an elastic modulus of the second support portion is in a range of 0.5 Gpa to 1.5 Gpa. [17] Display module according to claim 15 or 16, further comprising: an adhesive layer disposed on a side of the buffer layer near the display panel, wherein the second support portion is adhesively bonded to the adhesive layer. [18] Display device comprising: a display module according to one of claims 1 to 17; and an optical device arranged on a non-display side of the display module. [19] The display device of claim 18, further comprising: a light-shielding layer arranged on a side of the support layer in the display module facing away from the display panel and covering the optical device. [20] The display device according to claim 19, wherein an orthographic projection of the first hole of the support plate of the support layer on the display panel is located in a range of an orthographic projection of the light-shielding layer on the display panel; in a case where the first support portion of the support layer includes a plurality of second holes, orthographic projections of the plurality of second holes on the display panel are located in the range of the orthographic projection of the light-shielding layer on the display panel.

Images