Display modules and display devices

Abstract

The invention relates to a display module and display device, comprising a display panel and a cover plate. The display panel has a display area. The cover plate is arranged on the display face of the display panel, and consists of a first and a second appendix. The orthogonal projection of the first appendix on the display panel covers the display area of ​​the display panel, and the boundary of the orthogonal projection and the boundary of the display area are set apart. The second appendix is ​​arranged on the face of the first appendix at a distance from the display panel. The boundary of the orthogonal projection of the second appendix on the display panel lies within the boundary of the orthogonal projection of the first appendix on the display panel, and is at a distance from the boundary of the display area. The side wall of the second appendix is ​​made of convex and concave texture, and the convex and concave texture extends along the perimeter of the second appendix and encloses at least part of the second appendix.

Description

Display module and display device

[0001] This application claims priority to Chinese patent application No. 202311269791.3, filed on September 27, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to the field of display technology, and in particular to a display module and a display device. Background Art

[0003] Organic light-emitting diodes (OLEDs) have been widely used in the display field due to their advantages such as self-luminescence, low driving voltage, high luminous efficiency, fast response speed and flexible display.

[0004] Summary of the Invention

[0005] On the one hand, a display module is provided. The display module includes a display panel and a cover plate. The display panel has a display area. The cover plate is located on the display side of the display panel, and the cover plate includes a first sub-section and a second sub-section. The orthographic projection of the first sub-section on the display panel covers the display area of ​​the display panel, and the orthographic projection boundary is spaced apart from the boundary of the display area. The second sub-section is located on the side of the first sub-section away from the display panel, and the orthographic projection boundary of the second sub-section on the display panel is located within the orthographic projection boundary of the first sub-section on the display panel and is spaced apart from the boundary of the display area. Particularly, the sidewall of the second sub-section is provided with a concave-convex structure, and the concave-convex structure extends along the circumference of the second sub-section and surrounds at least a portion of the second sub-section.

[0006] In some embodiments, a surface roughness of a sidewall of the second sub-portion is less than or equal to 10 nm.

[0007] In some embodiments, the concave-convex structure includes a plurality of grooves arranged along a first direction, and the plurality of grooves are arranged continuously and / or at intervals; wherein the first direction is perpendicular to the cover plate.

[0008] In some embodiments, the maximum depth of the groove is greater than the distance between two adjacent grooves.

[0009] In some embodiments, the concave-convex structure includes a groove and / or a protrusion.

[0010] In some embodiments, a distance between an end of the concave-convex structure away from the first sub-section and the first sub-section is greater than 1 / 2 of a thickness of the second sub-section.

[0011] In some embodiments, a distance between an end of the concave-convex structure close to the first sub-section and the first sub-section is less than or equal to 1 / 2 of a thickness of the second sub-section.

[0012] In some embodiments, the edge of the surface of the second sub-section away from the first sub-section is chamfered; the ratio of the distance between the end of the concave-convex structure away from the first sub-section and the surface of the second sub-section away from the first sub-section to the thickness of the second sub-section is 0.05 to 0.2.

[0013] In some embodiments, the orthographic projection of the sidewall of the second sub-portion on the display panel is substantially circular.

[0014] In some embodiments, the groove extends along the circumference of the first sub-section, with two ends being a first end and a second end, the second end being located on a side of the first end close to the first sub-section to form a first thread. The groove surrounds the second sub-section at least three times.

[0015] In some embodiments, the boundary line of the orthographic projection of the concave-convex structure on the reference surface includes an arc and a straight line. Wherein, the reference surface is perpendicular to the cover plate and perpendicular to the boundary of the second sub-section.

[0016] In some embodiments, the concave-convex structure of the second sub-section in the cover plate includes a groove, and the ratio of the maximum depth of the groove to the distance between the boundary of the display area in the display panel and the boundary of the positive projection of the side wall of the second sub-section on the display panel is 0.05 to 1.

[0017] In some embodiments, a distance between a boundary of a display area in the display panel and a boundary of an orthographic projection of a sidewall of the second sub-portion on the display panel is 150 μm to 300 μm.

[0018] In another aspect, a display device is provided. The display device comprises: a display module as described in any of the above embodiments and a middle frame. The middle frame is located on a side of the first subsection of the cover plate away from the display panel. The middle frame extends along the circumference of the second subsection of the cover plate and surrounds the first subsection. The middle frame wraps around at least a portion of the concave-convex structure of the second subsection.

[0019] In some embodiments, the second end is located on a side of the first end close to the first sub-section to form a first thread, and a second thread is provided on a side wall of the middle frame close to the second sub-section, and the first thread and the second thread are screwed together.

[0020] In some embodiments, the middle frame and the cover plate form the accommodating cavity; the display device further includes an adhesive block, the adhesive block is located in the accommodating cavity, and the middle frame and the cover plate are bonded together by the adhesive block.

[0021] In some embodiments, the display device further includes a light-shielding layer, which is located between the display panel and the cover plate and surrounds the display area of ​​the display panel; the orthographic projection of the light-shielding layer on the display panel at least partially overlaps with the orthographic projection of the portion of the first sub-portion that exceeds the second sub-portion on the display panel.

[0022] In some embodiments, an orthographic projection of the light shielding layer on the display panel partially overlaps with the second sub-portion. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] To more clearly illustrate the technical solutions of the present disclosure, the following briefly introduces the drawings required for use in some embodiments of the present disclosure. Obviously, the drawings described below are only drawings of some embodiments of the present disclosure, and those skilled in the art can also derive other drawings based on these drawings. Furthermore, the drawings described below are schematic diagrams and are not intended to limit the actual dimensions of the products, actual processes of the methods, actual timing of signals, and the like involved in the embodiments of the present disclosure.

[0024] FIG1 is a structural diagram of a display device according to some embodiments;

[0025] FIG2 is a structural diagram of a circular display device according to some embodiments;

[0026] FIG3 is another structural diagram of a circular display device according to some embodiments;

[0027] FIG4 is another structural diagram of a square display device according to some embodiments;

[0028] FIG5 is a cross-sectional view taken along section line CC in FIG2 ;

[0029] FIG6 is a partial enlarged view of D in FIG5 ;

[0030] FIG7 is another partial enlarged view of D in FIG5 ;

[0031] FIG8 is another partial enlarged view of D in FIG5 ;

[0032] FIG9 is another partial enlarged view of D in FIG5 ;

[0033] FIG10 is another partial enlarged view of D in FIG5 ;

[0034] FIG11 is another partial enlarged view of D in FIG5 ;

[0035] FIG12 is another partial enlarged view of D in FIG5 ;

[0036] FIG13 is another partial enlarged view of D in FIG5 ;

[0037] FIG14 is a diagram illustrating a structure of a wave according to some embodiments;

[0038] FIG15 is another structural diagram of a small wave according to some embodiments;

[0039] FIG16 is a structural diagram showing a middle frame and a cover plate connected by screw threads according to some embodiments;

[0040] FIG17 is a structural diagram showing a middle frame and a cover plate connected by bonding blocks according to some embodiments;

[0041] FIG. 18 is a flow chart of a method for preparing a cover plate according to some embodiments. DETAILED DESCRIPTION

[0042] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the present disclosure. Obviously, the embodiments described are only some embodiments of the present disclosure, not all embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present disclosure.

[0043] Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and its other forms, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open and inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" are intended to indicate that the specific features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0044] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0045] When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. For example, when describing some embodiments, the term "connected" may be used to indicate that two or more components are in direct physical or electrical contact with each other. For another example, when describing some embodiments, the term "coupled" may be used to indicate that two or more components are in direct physical or electrical contact. However, the term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0046] “At least one of A, B and C” has the same meaning as “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, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B and C.

[0047] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0048] As used herein, the term "if" is optionally interpreted to mean "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined that" or "if [stated condition or event] is detected" are optionally interpreted to mean "upon determining" or "in response to determining" or "upon detecting [stated condition or event]" or "in response to detecting [stated condition or event]," depending on the context.

[0049] The use of "adapted to" or "configured to" herein is intended to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

[0050] Additionally, the use of “based on” is meant to be open and inclusive, as a process, step, calculation, or other action “based on” one or more stated conditions or values ​​may, in practice, be based on additional conditions or values ​​beyond those stated.

[0051] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0052] As used herein, "parallel", "perpendicular", and "equal" include the situations described and situations similar to the situations described, and the range of the similar situations is within an acceptable deviation range, wherein the acceptable deviation range is as determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity can also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality can be, for example, that the difference between the two equals is less than or equal to 5% of either one.

[0053] It will be understood that when a layer or element is referred to as being on another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may be present therebetween.

[0054] Exemplary embodiments are described herein with reference to cross-sectional and / or plan views that are idealized exemplary drawings. In the drawings, the thicknesses of layers and regions are exaggerated for clarity. Therefore, variations in shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Therefore, the exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include deviations in shape due to, for example, manufacturing. For example, an etched region shown as a rectangle will typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to illustrate the actual shape of regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0055] Some embodiments of the present disclosure provide a display device 1000, as shown in FIG1 . The display device 1000 can be any device that displays either moving (e.g., video) or fixed (e.g., still images), and whether text or images. For example, the display device 1000 can be a television, a laptop computer, a tablet computer, a mobile phone, a personal digital assistant (PDA), a navigator, a wearable device, an augmented reality (AR) device, a virtual reality (VR) device, or any other product or component with a display function.

[0056] The display device 1000 may be a liquid crystal display (LCD), an organic light-emitting diode (OLED), a quantum dot light-emitting diode (QLED), an active-matrix organic light-emitting diode (AMOLED), a micro light-emitting diode (MicroLED), or a sub-millimeter light-emitting diode (MiniLED). A micro LED refers to an LED chip with a size of less than 50 μm, and a mini LED refers to an LED chip with a size of 50 μm to 200 μm.

[0057] The following takes the display device 1000 as an organic light emitting diode display device 1000 as an example to schematically illustrate some embodiments of the present disclosure, but the implementation of the present disclosure is not limited to this, and any other display device 1000 can also be considered as long as the same technical concept is applied.

[0058] For example, as shown in FIG. 2 to FIG. 4 , when the display device 1000 is a wearable device, the display device 1000 may be a round watch as shown in FIG. 2 and FIG. 3 , or a square watch as shown in FIG. 4 .

[0059] Some embodiments of the present disclosure are schematically described below using a display device 1000 that is a round watch as an example. However, the embodiments of the present disclosure are not limited thereto, and any other display device 1000 may also be considered as long as the same technical concept is applied.

[0060] 2 to 5 , the display device 1000 includes a display module 100 . The display module 100 includes a display panel 10 and a cover plate 20 .

[0061] As shown in Figure 2, the display panel 10 includes a display area A (the area surrounded by the dotted line in Figure 2) and a peripheral area B (the area outside the area surrounded by the dotted line in Figure 2) arranged on at least one side of the display area A. Figures 2 to 4 illustrate the example of the peripheral area B being arranged around the display area A.

[0062] In some examples, as shown in FIG. 2 and FIG. 3 , the display area A is substantially circular in shape.

[0063] In this article, "substantially circular or elliptical" means that the shape is circular or elliptical as a whole, but is not limited to a standard circular or elliptical shape. That is, the "circular or elliptical" here includes not only a substantially circular or elliptical shape, but also a shape similar to a circular or elliptical shape.

[0064] The display area A is an area for displaying images and is configured to set multiple pixel units. The peripheral area B is an area for not displaying images and is configured to set a display driving circuit, for example, a gate driving circuit and a source driving circuit.

[0065] As shown in FIG5 , the display panel 10 has a display side 10A and a non-display side 10B that are disposed opposite each other. It should be noted that the display side 10A refers to the side of the display panel 10 that displays an image (the upper side of the display panel 10 in FIG5 ), and the non-display side 10B refers to the side opposite the display side 10A (the lower side of the display panel 10 in FIG5 ).

[0066] As shown in FIG5 , the cover plate 20 is located on the display side 10A of the display panel 10 . The cover plate 20 includes a first sub-portion 21 and a second sub-portion 22 .

[0067] The orthographic projection of the first sub-portion 21 on the display panel 10 covers the display area A, and the boundary of the orthographic projection is spaced apart from the boundary of the display area A. The second sub-portion 22 is located on a side of the first sub-portion 21 away from the display panel 10. The orthographic projection boundary of the second sub-portion 22 on the display panel 10 is located within the orthographic projection boundary of the first sub-portion 21 on the display panel 10 and is spaced apart from the boundary of the display area A.

[0068] In this manner, the cover plate 20 can shield the display panel 10 , thereby reducing the risk of the display panel 10 being scratched and increasing the service life of the display panel 10 .

[0069] For example, as shown in FIG2 , the boundary of the orthographic projection of the cover plate 20 on the display panel 10 (the boundary of the orthographic projection of the first sub-portion 21 on the display panel 10) is approximately circular. Alternatively, for example, as shown in FIG4 , the boundary of the orthographic projection of the cover plate 20 on the display panel 10 is approximately square. Alternatively, for example, as shown in FIG3 , the boundary of the orthographic projection of the cover plate 20 on the display panel 10 is an irregular shape. The embodiments of the present disclosure are not listed one by one.

[0070] Exemplarily, the material of the cover plate 20 includes sapphire or glass.

[0071] In some embodiments, as shown in FIG. 5 , the distance between the boundary of the display area A and the boundary of the orthographic projection of the sidewall of the second sub-portion 22 on the display panel 10 is 150 μm to 300 μm.

[0072] 5 , the second sub-portion 22 includes a first surface, a second surface and a sidewall between the first and second surfaces. The first surface is close to the display panel 10 , and the second surface is far from the display panel 10 .

[0073] For example, the distance between the boundary of the display area A and the boundary of the orthographic projection of the sidewall of the second sub-portion 22 on the display panel 10 is 150 nm, 153 nm, 155 nm, 160 nm, 180 nm, 200 nm, 240 nm, 270 nm, 290 nm, or 300 nm.

[0074] Arranged in this manner, the frame of the display module 100 can be made narrower, which is beneficial for achieving the purpose of a narrow frame of the display device 1000.

[0075] 5 , the surface roughness of the sidewall of the second sub-portion 22 is less than or equal to 10 nm. For example, the surface roughness of the sidewall of the second sub-portion 22 is 10 nm, 8 nm, 7 nm, 5 nm, 4 nm, or 1 nm, which are not listed in detail in the embodiments of the present disclosure.

[0076] In this manner, the side walls of the second sub-section 22 are relatively smooth, that is, the side walls of the second sub-section 22 are of better quality, which can improve the mechanical properties of the side walls of the second sub-section 22, thereby improving the mechanical properties of the display device 1000 (for example, anti-drop performance, anti-extrusion performance or waterproof performance).

[0077] 5 , the first sub-portion 21 has a first region 201 and a second region 202 surrounding the first region 201. The orthographic projection of the first region 201 on the display panel 10 substantially coincides with the display area A.

[0078] In the related art, a portion of the light emitted from the display area of ​​the display panel will enter the second area, be reflected by the side wall of the second sub-section, and then be emitted to the outside world from the second area. Generally, when a user observes the display device, the distance between the human eye and the display device is 30cm to 40cm, that is, the distance between the human eye and the cover plate 20 is 30cm to 40cm. The distance from the human eye to the cover plate is much larger than the distance between the boundary of the positive projection of the side wall of the second sub-section on the display panel and the boundary of the display area. Therefore, it can be considered that the light emitted from the second area to the human eye is roughly parallel. Therefore, when the user squints at the display device at a specific angle, such as 30° (the angle between the user's line of sight and the normal of the cover plate away from the surface of the display panel is 30°), the light can be transmitted from the second area to the human eye, causing the user to see the image displayed by the second sub-section in the second area, and the display device produces a "display ghosting" problem.

[0079] 6 , some embodiments of the present disclosure provide a second sub-section 22 of the cover plate 20 with a sidewall having a concave-convex structure 221. The concave-convex structure 221 extends along the circumference of the second sub-section 22 and surrounds at least a portion of the second sub-section 22.

[0080] Arranged in this manner, the concave-convex structure 221 can reflect at least part of the light transmitted to the human eye in the second area 202 to the first area 201 and emit it from the first area 201. Therefore, the cover plate 20 provided in some embodiments of the present disclosure can improve the problem of light being transmitted from the second area 202 to the human eye, and reduce the risk of the display device 1000 generating a "display ghost" problem due to light being transmitted to the human eye.

[0081] The light transmitted to the human eye in the second area 202 includes incident light and reflected light. It should be noted that the incident light refers to the light incident from the display area A into the second area 202 , and the reflected light refers to the light reflected by the sidewall of the second sub-section 22 .

[0082] In some examples, the concave-convex structure 221 can reflect incident light in the second region 202 to the first region 201 and emit the light from the first region 201 .

[0083] In other examples, the concave-convex structure 221 can reflect the reflected light in the second area 202 to the first area 201 and emit the reflected light from the first area 201 .

[0084] In some other examples, the concave-convex structure 221 can reflect incident light in the second region 202 to the first region 201 and emit from the first region 201. The concave-convex structure 221 can also reflect reflected light in the second region 202 to the first region 201 and emit from the first region 201.

[0085] In some embodiments, as shown in FIG. 6 to FIG. 12 , the concave-convex structure 221 includes at least one groove 2211 . The at least one groove 2211 reflects at least part of the light transmitted to the human eye to the first area 201 and emits the light from the first area 201 .

[0086] In some examples, as shown in Figures 6 to 8 , the concavo-convex structure 221 includes a plurality of grooves 2211 arranged along the first direction X. For example, as shown in Figures 6 and 7 , the plurality of grooves 2211 are arranged at intervals. Alternatively, for example, as shown in Figure 8 , the plurality of grooves 2211 are arranged continuously. Alternatively, for example, some of the plurality of grooves 2211 are arranged at intervals, while some of the plurality of grooves 2211 are arranged continuously.

[0087] In other examples, as shown in FIG. 9 to FIG. 12 , the concave-convex structure 221 includes a groove 2211 .

[0088] In other embodiments, as shown in FIG. 13 , the concave-convex structure 221 includes at least one protrusion 2212 , and the at least one protrusion 2212 reflects at least part of the light transmitted to the human eye to the first area 201 and emits the light from the first area 201 .

[0089] In some examples, the concave-convex structure 221 includes a plurality of protrusions 2212 arranged along the first direction X. For example, the plurality of protrusions 2212 are arranged at intervals. Alternatively, for example, the plurality of protrusions 2212 are arranged continuously. Alternatively, for example, some of the plurality of protrusions 2212 are arranged at intervals, and some of the protrusions 2212 are arranged continuously.

[0090] In some other examples, as shown in FIG. 13 , the concave-convex structure 221 includes a protrusion 2212 .

[0091] In some other embodiments, the concave-convex structure 221 includes at least one protrusion 2212 and at least one groove 2211, and the at least one protrusion 2212 and the at least one groove 2211 reflect at least part of the light transmitted to the human eye to the first area 201, and the light is emitted from the surface of the second sub-section 22 located in the first area 201 away from the first sub-section 21.

[0092] In some examples, the concave-convex structure 221 includes a plurality of grooves 2211 and a protrusion 2212 .

[0093] In some other examples, the concave-convex structure 221 includes a plurality of grooves 2211 and a plurality of protrusions 2212 .

[0094] In some other examples, the concave-convex structure 221 includes a groove 2211 and a plurality of protrusions 2212 .

[0095] In some other examples, the concave-convex structure 221 includes a groove 2211 and a protrusion 2212 .

[0096] In some embodiments, as shown in FIG6 , the boundary line of the orthographic projection of the concave-convex structure 221 on the reference surface comprises an arc. The reference surface is perpendicular to the cover plate 20 and to the boundary of the second sub-section 22. It will be appreciated that if the boundary of the second sub-section 22 is a straight line, the reference surface is perpendicular to the straight line. If the boundary of the second sub-section 22 is an arc, the reference surface is perpendicular to the normal of the arc.

[0097] In other embodiments, as shown in FIG. 7 , the boundary line of the orthographic projection of the concave-convex structure 221 on the reference surface includes a straight line.

[0098] In some other embodiments, the boundary line of the orthographic projection of the concave-convex structure 221 on the reference surface includes a straight line and an arc.

[0099] In some embodiments, as shown in FIG6 , the angle between the light emitted from the display area A and the display panel 10 is 30° to 90°, that is, the light emission angle of the display panel 10 is 30° to 150°.

[0100] For example, the light output angle of the display panel 10 is 30°, 35°, 45°, 50°, 58°, 62°, 70°, 75°, 79°, 80°, 82°, 85°, 89° or 90°. The embodiments of the present disclosure are not listed one by one.

[0101] Arranged in this manner, as shown in FIG6 , light within the second region 202 that is transmitted to the human eye is reflected at the upper-middle portion of the sidewall of the second subsection 22. That is, the sidewall of the second subsection 22 includes a reflective portion 222 and a non-reflective portion 223. Exemplarily, the spacing between the end of the reflective portion 222 that is close to the first subsection 21 and the first subsection 21 is greater than or equal to half the thickness of the second subsection 22. For example, the spacing between the end of the reflective portion 222 that is close to the first subsection 21 and the first subsection 21 is equal to half the thickness of the second subsection 22. The reflective portion 222 refers to the portion on the sidewall of the second subsection 22 that reflects incident light, and the non-reflective portion 223 refers to the portion on the sidewall of the second subsection 22 that does not reflect incident light.

[0102] As shown in Figure 6, when the distance between the end of the reflecting portion 222 close to the first sub-portion 21 and the first sub-portion 21 is equal to half the thickness of the second sub-portion 22, the distance between the end of the concave-convex structure 221 away from the first sub-portion 21 and the first sub-portion 21 is greater than 1 / 2 of the thickness of the second sub-portion 22.

[0103] Arranged in this manner, when the concave-convex structure 221 includes a groove 2211, no matter how deep the groove 2211 is, the groove 2211 can reflect at least part of the light transmitted to the human eye to the first area 201 and emit it from the first area 201, thereby reducing the risk of light being transmitted to the human eye and causing the display device 1000 to produce a "display ghosting" problem.

[0104] When the concave-convex structure 221 includes the protrusion 2212, the light transmitted to the human eye can hit the protrusion 2212, and the protrusion 2212 can reflect at least part of the light transmitted to the human eye to the first area 201 and emit it from the first area 201, which can reduce the risk of the display device 1000 causing the problem of "display ghosting" due to light being transmitted to the human eye.

[0105] As shown in Figure 6, on the basis that the distance between the end of the concave-convex structure 221 away from the first sub-section 21 and the first sub-section 21 is greater than 1 / 2 of the thickness of the second sub-section 22, the distance between the end of the concave-convex structure 221 close to the first sub-section 21 and the first sub-section 21 is less than or equal to 1 / 2 of the thickness of the second sub-section 22.

[0106] In this way, the concave-convex structure 221 can reflect most of the light transmitted to the human eye to the first area 201 and emit it from the first area 201, which can reduce the risk of light transmitted to the human eye causing the display device 1000 to produce "display ghosting" problems.

[0107] In some embodiments, as shown in FIG. 6 , an edge of the surface of the second sub-portion 22 away from the first sub-portion 21 is provided with a chamfer 226 .

[0108] In this manner, on the one hand, the chamfer 226 can remove burrs generated on the edge of the surface of the second sub-portion 22 away from the first sub-portion 21 .

[0109] On the other hand, the chamfer 226 can reflect light located on the upper portion of the sidewall of the second sub-section 22 toward the first region 201 and out from the first region 201, thereby reducing the risk of light penetrating the human eye and causing "ghosting" in the display device 1000. For example, the ratio of the distance between the end of the upper portion of the sidewall of the second sub-section 22 that is closest to the first sub-section 21 and the surface of the second sub-section 22 that is away from the first sub-section 21 to the thickness of the second sub-section 22 is 0.2. In other words, the ratio of the distance between the end of the reflective portion 222 that is away from the first sub-section and the surface of the second sub-section 22 that is away from the first sub-section 21 to the thickness of the second sub-section 22 is 0.2.

[0110] In some embodiments, as shown in Figure 6, on the basis that the edge of the surface of the second sub-section 22 away from the first sub-section 21 is provided with a chamfer 226, the ratio of the distance between the end of the concave-convex structure 221 away from the first sub-section 21 and the surface of the second sub-section 22 away from the first sub-section 21 to the thickness of the second sub-section 22 is 0.05 to 0.2.

[0111] For example, the ratio of the distance between one end of the concave-convex structure 221 away from the first sub-section 21 and the surface of the second sub-section 22 away from the first sub-section 21 to the thickness of the second sub-section 22 is 0.05, 0.06, 0.07, 0.08, 0.09, 0.12, 0.14, 0.15, 0.17, 0.19 or 0.2, which are not listed one by one in the embodiments of the present disclosure.

[0112] In this manner, the upper portion of the sidewall of the second sub-portion 22 does not have the concavo-convex structure 221 , which can improve the mechanical properties of the sidewall of the second sub-portion 22 .

[0113] The following takes the concave-convex structure 221 including at least one groove 2211 as an example to schematically illustrate some embodiments of the present disclosure, but the implementation of the present disclosure is not limited to this, and any other concave-convex structure 221 can also be considered as long as the same technical concept is applied.

[0114] In some embodiments, as shown in FIG6 , the cover plate 20 includes an incident area 224 and a reflective area 225 . The incident area 224 is the area formed by the incident light rays included in the light rays transmitted to the human eye. The reflective area 225 is the area formed by the reflected light rays included in the light rays transmitted to the human eye. The incident area 224 and the reflective area 225 may overlap.

[0115] In some examples, as shown in FIG. 6 , an orthographic projection of at least one groove 2211 on the reference surface partially overlaps with an orthographic projection of the incident area 224 on the reference surface.

[0116] Arranged in this manner, at least one groove 2211 can reflect at least part of the incident light to the first region 201 and emit it from the first region 201, thereby reducing the risk of light being transmitted to the human eye and causing the display device 1000 to produce a "ghost display" problem.

[0117] In other examples, as shown in FIG6 , the orthographic projection of at least one groove 2211 on the reference surface partially overlaps with the orthographic projection of the reflective area 225 on the reference surface.

[0118] Arranged in this manner, at least one groove 2211 can reflect at least part of the reflected light to the first area 201 and emit it from the first area 201, thereby reducing the risk of light being transmitted to the human eye and causing the display device 1000 to produce a "ghost display" problem.

[0119] In some other examples, as shown in FIG6 , the orthographic projection of at least one groove 2211 on the reference surface partially overlaps with the orthographic projection of the incident area 224 on the reference surface, and partially overlaps with the orthographic projection of the reflective area 225 on the reference surface.

[0120] In this manner, the at least one groove 2211 can reflect at least a portion of incident light to the first region 201 and emit it from the first region 201, and can also reflect at least a portion of reflected light to the first region 201 and emit it from the first region 201. This can reduce the risk of light penetrating into the human eye, causing the display device 1000 to produce "ghost images."

[0121] In some embodiments, as shown in FIG. 6 , the ratio of the maximum depth of the groove 2211 to the distance between the boundary of the display area A and the boundary of the orthographic projection of the sidewall of the second sub-portion 22 on the display panel 10 is 0.05-1.

[0122] For example, the ratio of the maximum depth of the groove 2211 to the distance between the boundary of the display area A and the boundary of the positive projection of the side wall of the second sub-portion 22 on the display panel 10 is 0.05, 0.1, 0.4, 0.7, 0.9 or 1, and the embodiments of the present disclosure are not listed one by one.

[0123] In this manner, the groove 2211 can reflect most of the light transmitted to the human eye to the first area 201 and emit it from the first area 201. This can reduce the risk of light transmitted to the human eye causing the display device 1000 to produce "dark images".

[0124] On the other hand, the groove is only located in the second area 202 , and the groove will not affect the normal display of the display area A.

[0125] In some embodiments, when the concavo-convex structure 221 includes a plurality of grooves 2211 , the maximum depth of a groove 2211 may be smaller than the depths of two adjacent grooves 2211 .

[0126] In this manner, when a plurality of grooves 2211 are processed, the processing efficiency of the grooves 2211 can be improved.

[0127] In some embodiments, as shown in FIG. 14 and FIG. 15 , when the concavo-convex structure 221 includes a plurality of grooves 2211 continuously arranged along the first direction X, the shape of the boundary line of the orthographic projection of the plurality of grooves 2211 on the reference surface is wavy.

[0128] In some examples, as shown in FIG. 14 , the ratio of the wavelength H to the wave height W is greater than or equal to 10.

[0129] For example, the ratio of the wavelength H to the wave height W is 10, 12, 15, 18, 20 or 30, which are not listed one by one in the embodiments of the present disclosure.

[0130] For example, when the wave height W is 20 μm, the wavelength H may be 200 μm.

[0131] In other examples, as shown in FIG15 , the ratio of the wavelength H to the wave height W is 2-5.

[0132] For example, the ratio of the wavelength H to the wave height W is 2, 2.5, 3, 3.3, 4 or 5, which are not listed one by one in the embodiments of the present disclosure.

[0133] For example, when the wave height W is 20 μm, the wavelength H may be 60 μm to 80 μm.

[0134] For example, the wavelength H may be 60 μm, 62 μm, 65 μm, 68 μm, 70 μm, 74 μm, 78 μm, or 80 μm. The embodiments of the present disclosure are not listed one by one.

[0135] In some embodiments, as shown in FIG. 9 to FIG. 12 , the concave-convex structure 221 includes a groove 2211 .

[0136] In some examples, as shown in FIG9 , the orthographic projection of the groove 2211 on the reference surface partially overlaps with the orthographic projection of the portion of the reflective region 225 that does not overlap with the incident region 224. That is, the groove 2211 is located on the side of the reflective portion 222 away from the first sub-portion 21.

[0137] In other examples, as shown in FIG10 , the orthographic projection of the groove 2211 on the reference surface at least partially overlaps with the orthographic projection of the portion of the reference surface where the incident area 224 and the reflective area 225 overlap.

[0138] In this manner, the maximum depth of the groove 2211 can be shallower, less material is removed from the second sub-portion 22 , and the mechanical strength of the second sub-portion 22 can be improved.

[0139] In some other examples, as shown in FIG11 , the orthographic projection of the groove 2211 on the reference surface partially overlaps with the orthographic projection of the portion of the incident region 224 that does not overlap with the reflective region 225. That is, the groove 2211 is located on the side of the reflective portion 222 that is close to the first sub-portion 21.

[0140] In some other examples, as shown in FIG12 , in an orthographic projection onto a reference surface, the groove 2211 overlaps with a portion of the reflective region 225 that does not overlap with the incident region 224, a portion of the incident region 224 and the reflective region 225 that overlap, and a portion of the incident region 224 that does not overlap with the reflective region 225. That is, the groove 2211 is located on both the reflective portion 222 and the non-reflective portion 223.

[0141] In some embodiments, as shown in FIG6 , the distance between the boundary of the display area A and the boundary of the orthographic projection of the sidewall of the second sub-portion 22 on the display panel 10 is 200 μm, and the maximum depth of the groove 2211 may be 10 μm to 200 μm.

[0142] For example, the maximum depth of the groove 2211 may be 10 μm, 15 μm, 20 μm, 30 μm, 50 μm, 80 μm, 100 μm, 110 μm, 150 μm, 180 μm or 200 μm, which are not listed one by one in the embodiments of the present disclosure.

[0143] In some examples, during the process of manufacturing the display module 100 , there may be a fitting tolerance between the display panel 10 and the cover plate 20 (eg, a fitting tolerance of ±150 μm). The maximum depth of the groove 2211 may be 10 μm to 50 μm.

[0144] For example, the maximum depth of the groove 2211 may be 10 μm, 12 μm, 15 μm, 17 μm, 18 μm, 20 μm, 25 μm, 30 μm, 38 μm, 40 μm or 50 μm, which are not listed one by one in the embodiments of the present disclosure.

[0145] Arranged in this manner, the problem of the groove 2211 affecting the normal display of the display area A due to reduced fitting tolerance can be improved.

[0146] In some examples, during the process of machining the groove 2211 , the groove 2211 has a sidewall profile tolerance (eg, a sidewall profile tolerance of ±25 μm). The maximum depth of the groove 2211 may be 10 μm to 175 μm.

[0147] For example, the maximum depth of the groove 2211 may be 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 100 μm, 150 μm, 170 μm or 175 μm, which are not listed one by one in the embodiments of the present disclosure.

[0148] This arrangement can improve the problem that the groove 2211 affects the normal display of the display area A due to the tolerance of the side wall shape.

[0149] In some examples, the maximum depth of the groove 2211 may be 10 μm to 25 μm.

[0150] For example, the maximum depth of the groove 2211 may be 10 μm, 12 μm, 13 μm, 15 μm, 16 μm, 17 μm, 19 μm, 20 μm, 22 μm, 24 μm or 25 μm, which are not listed one by one in the embodiments of the present disclosure.

[0151] In this way, the problem of the groove 2211 being located in the first area 201 due to the fitting tolerance and the side wall shape tolerance can be improved, and the risk of the groove 2211 affecting the normal display of the display area A can be reduced.

[0152] In some embodiments, as shown in Figures 16 and 17 , the display device 1000 further includes a middle frame 200. The middle frame 200 is located on a side of the first sub-portion 21 of the cover plate 20 away from the display panel 10. The middle frame 200 extends along the circumference of the second sub-portion 22 of the cover plate 20 and surrounds the first sub-portion 21.

[0153] In this manner, when the display device 1000 collides with an external object, the middle frame 200 will collide with the external object first, thereby improving the problem of damage to the cover plate 20 caused by the collision between the display device 1000 and the external object.

[0154] As shown in FIG. 16 and FIG. 17 , the middle frame 200 wraps at least a portion of the concave-convex structure 221 of the second sub-portion 22 .

[0155] In this manner, when the display device 1000 collides with an external object, the middle frame 200 will collide with the external object first. The middle frame 200 can improve the problem of damage to the concave-convex structure 221 caused by the collision between the display device 1000 and the external object.

[0156] Two connection methods of the middle frame 200 and the cover plate 20 are described below.

[0157] In some embodiments, as shown in FIG16 , the orthographic projection of the sidewall of the second sub-portion 22 on the display panel 10 is approximately circular, and the groove 2211 extends along the circumference of the second sub-portion 22. The two ends of the groove 2211 are a first end and a second end, and the second end is located on the side of the first end close to the first sub-portion 21 to form a first thread 1. A second thread 2 is provided on the sidewall of the middle frame 200 close to the second sub-portion 22, and the first thread 1 and the second thread 2 are screwed together. Here, "approximately circular" means that the shape is circular as a whole, but is not limited to a standard circle. That is, the "circular" here includes not only a basic circle, but also a shape similar to a circle.

[0158] Arranged in this manner, the cover plate 20 and the middle frame 200 can be installed and removed more conveniently.

[0159] In some examples, as shown in FIG. 16 , the groove 2211 surrounds the second sub-portion 22 at least three times.

[0160] For example, the groove 2211 surrounds the second sub-portion 22 three times, four times, four and a half times, five times, or six times, which are not listed one by one in the embodiments of the present disclosure.

[0161] In this manner, the first thread 1 and the second thread 2 are screwed together for a greater number of turns, so that the cover plate 20 and the middle frame 200 are more firmly connected.

[0162] In some examples, as shown in FIG. 16 , when the middle frame 200 and the cover plate 20 are connected by threads (a first thread 1 and a second thread 2 ), the middle frame 200 is also in contact with the first sub-portion 21 .

[0163] Arranged in this way, the first sub-section 21 supports the middle frame 200, which can improve the problem of the first thread 1 and the second thread 2 being squeezed against each other by the gravity of the middle frame 200, and reduce the risk of the first thread 1 and the second thread 2 being squeezed against each other and causing the thread to wear faster.

[0164] In other embodiments, as shown in FIG17 , the middle frame 200 and the cover plate 20 enclose a receiving cavity 3. The display device 1000 further includes a bonding block 300 located in the receiving cavity 3, through which the middle frame 200 and the cover plate 20 are bonded.

[0165] In this manner, the groove 2211 will not be squeezed by the middle frame 200 , thereby reducing the risk of the groove 2211 being damaged due to the squeeze between the groove 2211 and the middle frame 200 .

[0166] Exemplarily, as shown in FIG17 , the middle frame 200 includes a first extension portion 210 and a second extension portion 220. The first extension portion 210 extends along the first direction X and is spaced apart from the second sub-portion 22. The second extension portion 220 extends along the second direction Y and is spaced apart from the first sub-portion 21. An end of the second extension portion 220 away from the second sub-portion 22 is connected to an end of the second extension portion 220 away from the first sub-portion 21. The second direction Y intersects the first direction X. For example, the second direction Y is perpendicular to the first direction X. The first extension portion 210, the second extension portion 220, the second sub-portion 22 and the first sub-portion 21 form a receiving cavity 3. The first extension portion 210 and the second sub-portion 22 are bonded together by the bonding block 300, and the second extension portion 220 and the first sub-portion 21 are bonded together by the bonding block 300.

[0167] In some embodiments, as shown in Figures 16 and 17 , the display module 100 further includes a light shielding layer 30 , which is located between the display panel 10 and the cover plate 20 and surrounds the display area A. The orthographic projection of the light shielding layer 30 on the display panel 10 at least partially overlaps with the orthographic projection of the portion of the first sub-portion 21 that extends beyond the second sub-portion 22 on the display panel 10 .

[0168] Exemplarily, as shown in FIG. 16 , the orthographic projection of the light shielding layer 30 on the display panel 10 partially overlaps with the second sub-portion 22 .

[0169] As shown in FIG. 16 and FIG. 17 , the display module 100 further includes a circular polarizer 40 , a backing film 50 and a first adhesive layer 60 .

[0170] The circular polarizer 40 is located between the light shielding layer 30 and the display panel 10. The first adhesive layer 60 is located between the light shielding layer 30 and the circular polarizer 40. The cover plate 20 and the circular polarizer 40 are bonded together by the first adhesive layer 60. The back film 50 is located on the side of the display panel 10 away from the cover plate 20.

[0171] Some embodiments of the present disclosure further provide a method for preparing a cover plate 20 . As shown in FIG. 18 , the method for preparing the cover plate 20 includes steps S100 to S400 .

[0172] S100 , providing an initial cover plate 110 .

[0173] The initial cover plate 110 includes a first initial second sub-portion 1101 and a first sub-portion 21 which are stacked. The second initial sub-portion and the first sub-portion 21 are stacked.

[0174] Exemplarily, the ratio of the thickness of the first initial second sub-portion 1101 to the thickness of the first sub-portion 21 is 3.

[0175] S200 , removing an edge portion of the first initial second sub-portion 1101 to form a second sub-portion 22 .

[0176] Illustratively, S200 includes S201 to S202.

[0177] S201 , removing part of the first initial second sub-portion 1101 to form a second initial second sub-portion 1102 .

[0178] The boundary of the second initial second sub-portion 1102 is within the boundary of the first sub-portion 21 and is spaced apart from the boundary of the first sub-portion 21 .

[0179] For example, a computer numerical control (CNC) machine tool can be used to machine the first initial second sub-section 1101 to form the second initial second sub-section 1102. During this machining process, the CNC machine tool can have a relatively large machining volume, for example, a machining volume of 2 mm to 3 mm.

[0180] For example, the processing amount is 2 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.7 mm, 2.8 mm, 2.9 mm or 3 mm, which are not listed one by one in the embodiments of the present disclosure.

[0181] In this manner, the processing speed of the CNC machine tool is faster, thereby reducing the preparation time of the cover plate 20 .

[0182] S202 , removing a portion of the second initial second sub-portion 1102 to form a second sub-portion 22 , thereby forming a cover plate 20 .

[0183] The boundary of the second subsection 22 is within the boundary of the first subsection 21 and is spaced apart from the boundary of the second subsection 22. The sidewall of the second subsection 22 is provided with a concave-convex structure 221, which extends along the circumference of the second subsection 22 and surrounds at least part of the second subsection 22.

[0184] For example, a computer numerical control machine tool may be used to process the second initial second sub-portion 1102 to form the second sub-portion 22. During this processing, the processing volume of the computer numerical control machine tool may be relatively small, for example, the processing volume is less than 1 mm.

[0185] For example, the processing amount is 100 μm, 150 μm, 300 μm, 500 μm, 700 μm, 800 μm, 850 μm, 950 μm or 1 mm, which are not listed one by one in the embodiments of the present disclosure.

[0186] Set up in this way, the processing speed of the computer numerical control machine tool is slow, so that the surface quality of the concave-convex structure can be improved.

[0187] S300 , polishing the sidewall of the second sub-portion 22 and the surface of the concavo-convex structure 221 .

[0188] For example, a polishing machine may be used to polish the sidewall of the second sub-portion 22 and the surface of the concavo-convex structure 221 , so that the surface roughness of the sidewall of the second sub-portion 22 is less than 10 nm.

[0189] In this manner, the sidewalls of the second sub-portion 22 can be made smoother, that is, the sidewalls of the second sub-portion 22 have better quality, thereby improving the mechanical properties of the sidewalls of the second sub-portion 22 and thus improving the mechanical properties of the display device 1000 .

[0190] S400 , coating, silk-screening, cleaning, and testing the cover plate 20 .

[0191] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0192] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that a person skilled in the art can conceive within the technical scope disclosed in the present disclosure should be included within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A display module, comprising: A display panel having a display area; a cover plate, located at a display side of the display panel, the cover plate comprising a first sub-portion and a second sub-portion; an orthographic projection of the first sub-portion on the display panel covers the display area, and a boundary of the orthographic projection is spaced from a boundary of the display area; the second sub-portion is located at a side of the first sub-portion away from the display panel, and a boundary of the orthographic projection of the second sub-portion on the display panel is located within a boundary of the orthographic projection of the first sub-portion on the display panel, and is spaced from a boundary of the display area; Wherein, a side wall of the second sub-section is provided with a concave-convex structure, and the concave-convex structure extends along the circumference of the second sub-section and surrounds at least a part of the second sub-section.

2. The display module according to claim 1, wherein: The surface roughness of the side wall of the second sub-portion is less than or equal to 10 nm.

3. The display module according to claim 1 or 2, wherein: The concave-convex structure includes a plurality of grooves arranged along a first direction, and the plurality of grooves are arranged continuously and / or at intervals; wherein the first direction is perpendicular to the cover plate.

4. The display module according to claim 3, wherein: The maximum depth of the groove is greater than the distance between two adjacent grooves.

5. The display module according to claim 1 or 2, wherein: The concave-convex structure includes a concave groove and / or a convex protrusion.

6. The display module according to any one of claims 1 to 5, wherein: A distance between an end of the concavo-convex structure away from the first sub-portion and the first sub-portion is greater than 1 / 2 of a thickness of the second sub-portion.

7. The display module according to claim 6, wherein: A distance between an end of the concavo-convex structure close to the first sub-portion and the first sub-portion is less than or equal to 1 / 2 of a thickness of the second sub-portion.

8. The display module according to any one of claims 1 to 7, wherein: The edge of the surface of the second sub-section away from the first sub-section is chamfered; the ratio of the distance between the end of the concave-convex structure away from the first sub-section and the surface of the second sub-section away from the first sub-section to the thickness of the second sub-section is 0.05-0.

2.

9. The display module according to any one of claims 1 to 8, wherein: The orthographic projection of the side wall of the second sub-portion on the display panel is substantially circular.

10. The display module according to claim 9, wherein: The concave-convex structure includes a groove, which extends along the circumference of the second sub-section, with two ends of the extension being a first end and a second end, and the second end is located on a side of the first end close to the first sub-section to form a first thread.

11. The display module according to claim 10, wherein: The groove surrounds the second sub-portion at least three times.

12. The display module according to any one of claims 1 to 11, wherein: The boundary line of the orthographic projection of the concavo-convex structure on the reference surface includes an arc line and a straight line; wherein the reference surface is perpendicular to the cover plate and perpendicular to the boundary of the second sub-section.

13. The display module according to any one of claims 1 to 12, wherein: The concavo-convex structure of the second sub-portion in the cover plate includes a groove, and the ratio of the maximum depth of the groove to the distance between the boundary of the display area in the display panel and the boundary of the orthographic projection of the side wall of the second sub-portion on the display panel is 0.05-1.

14. The display module according to any one of claims 1 to 12, wherein: A distance between a boundary of a display area in the display panel and a boundary of an orthographic projection of a side wall of the second sub-portion on the display panel is 150 μm to 300 μm.

15. A display device, comprising: The display module according to any one of claims 1 to 14; The middle frame is located on the side of the first sub-section of the cover plate away from the display panel. The middle frame extends along the circumference of the second sub-section of the cover plate and surrounds the first sub-section. The middle frame wraps at least part of the concave-convex structure of the second sub-section.

16. The display device according to claim 15, wherein: The second end is located on a side of the first end close to the first sub-section to form a first thread. A second thread is provided on a side wall of the middle frame close to the second sub-section. The first thread and the second thread are screwed together.

17. The display device according to claim 15, wherein: The middle frame and the cover plate form the accommodating cavity; the display device further comprises a bonding block, the bonding block is located in the accommodating cavity, and the middle frame and the cover plate are bonded by the bonding block.

18. The display device according to any one of claims 15 to 17, wherein: The display module also includes: A shading layer is located between the display panel and the cover plate and surrounds the display area of ​​the display panel; an orthographic projection of the shading layer on the display panel at least partially overlaps with an orthographic projection of a portion of the first sub-portion that exceeds the second sub-portion on the display panel.

19. The display device according to claim 18, wherein: The orthographic projection of the light shielding layer on the display panel partially overlaps with the second sub-portion.

Images