Display module and display apparatus

Abstract

The present application discloses a display module (300) and a display apparatus (1000). The display module (300) comprises a backlight module (100) and a display panel (200), wherein the display panel (200) is located on a light exit side of the backlight module (100). The display panel (200) comprises a first display area (AA1) and a second display area (AA2), and the second display area (AA2) surrounds the first display area (AA1). The brightness ratio of the second display area (AA2) to the first display area (AA1) is greater than or equal to 0.85. The backlight module (100) comprises a back plate (20) and a middle frame (10). The back plate (20) comprises a bottom plate (21) and a side plate (22), and the side plate (22) surrounds the peripheral edge of the bottom plate (21). The middle frame (10) is arranged at the end of the side plate (22) away from the bottom plate (21), and the middle frame (10) and the back plate (20) define a cavity (30). The orthographic projection of the middle frame (10) on the display panel (200) at least partially overlaps with the second display area (AA2). The middle frame (10) comprises an inner wall surface (11) located in the cavity (30), the inner wall surface (11) comprises a reflecting surface (111) arranged toward the display panel (200), and the end of the reflecting surface (111) away from the bottom plate (21) is farther away from a central area of the cavity (30) than the end of the reflecting surface (111) facing the bottom plate (21).

Description

Display module and display device

[0001] This application claims priority to Chinese patent application No. 202410015913.4, filed on January 3, 2024, the entire contents of which are incorporated herein by reference. 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] Mini LED (Mini Organic Light-Emitting Diode) / Micro LED (Micro Organic Light-Emitting Diode) display devices have the advantages of high brightness, clear display and low power consumption, and have good application prospects. Summary of the Invention

[0004] In one aspect, a display module is provided. The display module includes a display panel and a backlight module, wherein the display panel is located on the light-emitting side of the backlight module. The display panel includes a first display area and a second display area, wherein the second display area surrounds the first display area, and the brightness ratio between the second display area and the first display area is greater than or equal to 0.85. The backlight module includes a backplate and a middle frame. The backplate includes a bottom plate and side plates, wherein the bottom plate is opposite to the display panel, and the side plates are arranged around the edges of the bottom plate and are located on the side of the bottom plate closer to the display panel. The middle frame is arranged at the end of the side plate away from the bottom plate, and the middle frame and the backplate enclose a cavity. The orthographic projection of the middle frame on the display panel at least partially overlaps with the second display area. The middle frame includes an inner wall surface located within the cavity, wherein the inner wall surface includes a reflective surface arranged toward the display panel, and the end of the reflective surface away from the bottom plate is farther from the center area of ​​the cavity than the end of the reflective surface closer to the bottom plate.

[0005] In some embodiments, the middle frame further includes an outer wall surface located outside the cavity, wherein the side of the outer wall surface facing away from the center area of ​​the cavity includes an outer surface, and the outer surface is perpendicular to the display panel. The middle frame further includes a supporting portion proximal to the display panel, wherein the side of the supporting portion proximal to the display panel includes a supporting surface, and the supporting surface is configured to connect the inner wall surface and the outer surface. The supporting surface is a circular arc surface that is convex toward the display panel.

[0006] In some embodiments, the radius of the arc surface ranges from 1 mm to 5 mm.

[0007] In some embodiments, a first angle is formed between the reflective surface of the middle frame and the display panel, and the first angle is greater than or equal to 50° and less than 90°.

[0008] In some embodiments, the reflective surface is a plane.

[0009] In some embodiments, the reflective surface is an arc-shaped surface convex toward the central area of ​​the cavity.

[0010] In some embodiments, the radius of the arc-shaped surface is greater than or equal to 8 mm.

[0011] In some embodiments, in a direction from the second display area to the first display area, a minimum distance between the end of the reflective surface away from the display panel and the outer surface is a first distance, and the first distance is less than or equal to 5 mm.

[0012] In some embodiments, along the direction of the bottom plate pointing to the display panel, the minimum distance between the reflective surface close to one end of the bottom plate and the supporting surface is a second distance, and the second distance is greater than or equal to 6 mm.

[0013] In some embodiments, the backlight module further includes a reflective layer, the reflective layer is located on a side of the back plate close to the display panel, the reflective layer includes a plurality of openings, and the light-emitting units are located in the openings.

[0014] In some embodiments, the middle frame further comprises a supporting portion, which, in a direction along the bottom plate toward the display panel, comprises a first portion and a second portion, the second portion being located on a side of the first portion facing away from the display panel, the first portion comprising the reflective surface, the second portion comprising a first extended surface connected to the reflective surface, the first extended surface being perpendicular to the display panel. The reflective layer comprises a first bent portion on a side proximal to the middle frame, bent toward the display panel, and the first bent portion being perpendicular to the display panel; the first bent portion comprises a first overlapping portion on a side proximal to the display panel, the first overlapping portion being located on a side of the second portion facing away from the peripheral area, and being fixedly connected to the first extended surface.

[0015] In some embodiments, the first overlapping portion overlaps the first extension surface in a direction from the second display area to the first display area, and a length of the first overlapping portion is greater than or equal to 5 mm in a direction from the bottom plate to the display panel.

[0016] In some embodiments, the middle frame further includes a supporting portion, which, along the direction from the bottom plate toward the display panel, includes a first portion and a second portion, the second portion being located on a side of the first portion facing away from the display panel, the first portion including the reflective surface, and the second portion including a second extended surface connected to the reflective surface. The second portion protrudes toward the center area of ​​the cavity, and the side of the second portion facing away from the display panel abuts against a side of the reflective layer closer to the display panel.

[0017] In some embodiments, the middle frame further includes an abutting portion, the abutting portion is located on a side of the second portion away from the first portion, and the side of the abutting portion away from the display panel abuts against a side of the reflective layer close to the display panel.

[0018] In some embodiments, the side of the middle frame close to the back plate further includes a limiting groove, and the side plate is located in the limiting groove.

[0019] In some embodiments, the backlight module further comprises a diffuser plate, the diffuser plate being located between the middle frame and the display panel, the support surface of the middle frame being in contact with the diffuser plate, the diffuser plate comprising a glass substrate and an optical film located on a side of the glass substrate facing away from the middle frame.

[0020] In another aspect, a display device is provided, comprising: a display module as described in any of the above embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] FIG1 is a schematic plan view of a display device according to some embodiments;

[0023] FIG2 is a schematic plan view of a display device according to some other embodiments;

[0024] FIG3 is a structural diagram of a display device according to some embodiments;

[0025] FIG4 is a partial structural diagram of a display module according to some embodiments;

[0026] FIG5 is a partial structural diagram of a display module according to some other embodiments;

[0027] FIG6 is a partial structural diagram of a display module according to yet other embodiments;

[0028] FIG7 is a light path diagram corresponding to when the second portion of the middle frame is a flat surface and a curved surface according to some embodiments;

[0029] FIG8 is a diagram showing simulation results of display brightness of a display module when the second extended surface of the middle frame is a curved surface according to some embodiments;

[0030] FIG9 is a line graph showing the display brightness of the display module when the second extended surface of the middle frame is a curved surface according to some embodiments;

[0031] FIG10 is a diagram showing simulation results of display brightness of a display module when the second extension surface of the middle frame is a plane according to some embodiments;

[0032] FIG11 is a line graph showing the display brightness of the display module when the second extension surface of the middle frame is a plane according to some embodiments;

[0033] FIG12 is a partial enlarged view of Q in FIG4 ;

[0034] FIG13 is a partial structural diagram of a middle frame according to some embodiments;

[0035] FIG14 is a partial structural diagram of a middle frame according to some other embodiments;

[0036] FIG15 is a light path diagram corresponding to when the reflective surface of the middle frame is a flat surface and a curved surface according to some embodiments;

[0037] FIG16 is a light path diagram corresponding to when the reflective surface of the middle frame is a flat surface or a curved surface according to other embodiments;

[0038] FIG17 is a diagram showing simulation results of display brightness of a display module when the reflective surface of the middle frame is a flat surface according to some embodiments;

[0039] FIG18 is a line graph showing the display brightness of the display module when the reflective surface of the middle frame is a flat surface according to some embodiments;

[0040] FIG19 is a diagram showing simulation results of display brightness of a display module when the reflective surface of the middle frame is a curved surface according to some embodiments;

[0041] FIG20 is a line graph showing the display brightness of the display module when the reflective surface of the middle frame is a curved surface according to some embodiments;

[0042] FIG21 is a partial structural diagram of a middle frame according to yet other embodiments;

[0043] FIG22 is a partial structural diagram of a middle frame according to yet other embodiments;

[0044] FIG23 is a light path diagram corresponding to first spacings of the middle frame of 4.8 mm and 2.2 mm according to some embodiments;

[0045] FIG24 is a light path diagram corresponding to the first spacing of the middle frame being 4.8 mm and 2.2 mm according to some other embodiments;

[0046] FIG25 is a diagram showing simulation results of display brightness of a display module when the first spacing of the middle frame is equal to 4.8 mm according to some embodiments;

[0047] FIG26 is a line graph showing the display brightness of the display module when the first spacing between the middle frames is equal to 4.8 mm according to some embodiments;

[0048] FIG27 is a diagram showing simulation results of display brightness of a display module when the first spacing of the middle frame is equal to 2.2 mm according to some embodiments;

[0049] FIG28 is a line graph showing the display brightness of the display module when the first spacing of the middle frame is equal to 2.2 mm according to some embodiments;

[0050] FIG29 is a partial structural diagram of a middle frame according to yet other embodiments;

[0051] FIG30 is a partial structural diagram of a middle frame according to yet other embodiments;

[0052] FIG31 is a light path diagram corresponding to a second distance of 6 mm and 10 mm for the middle frame according to some embodiments;

[0053] FIG32 is a light path diagram corresponding to a second distance of 6 mm and 10 mm for the middle frame according to other embodiments;

[0054] FIG33 is a diagram showing simulation results of display brightness of a display module when the second distance of the middle frame is equal to 6 mm according to some embodiments;

[0055] FIG34 is a line graph showing the display brightness of the display module when the second distance of the middle frame is equal to 6 mm according to some embodiments;

[0056] FIG35 is a diagram showing simulation results of display brightness of a display module when the second distance of the middle frame is equal to 10 mm according to some embodiments;

[0057] FIG36 is a line graph showing the display brightness of the display module when the second distance of the middle frame is equal to 10 mm according to some embodiments. DETAILED DESCRIPTION

[0058] 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.

[0059] 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 "some embodiments", "example", "some examples" and the like are intended to indicate that the particular 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 particular features, structures, materials or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0060] 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.

[0061] When describing some embodiments, the word "connected" and its derivatives may be used. The term "connected" should be understood broadly. For example, "connected" can mean fixed, removable, or integrated; it can be directly connected or indirectly connected through an intermediary. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0062] “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.

[0063] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0064] 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.

[0065] As used herein, "about" or "approximately" includes the stated value and the average value that is within an acceptable range of deviation from the particular value, where the acceptable range of deviation is 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).

[0066] As used herein, "parallel" and "perpendicular" include the conditions described and conditions similar to the conditions described, and the range of the similar conditions is within an acceptable deviation range, wherein the acceptable deviation range is 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 for approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range for approximate perpendicularity can also be, for example, a deviation within 5°.

[0067] 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.

[0068] Exemplary embodiments are described herein with reference to cross-sectional and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of layers and the area of ​​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.

[0069] FIG1 is a schematic plan view of a display device according to some embodiments, and FIG2 is a schematic plan view of a display device according to other embodiments.

[0070] As shown in FIG. 1 and FIG. 2 , some embodiments of the present disclosure provide a display device 1000 .

[0071] Exemplarily, the display device 1000 can be any display device that displays images, whether in motion (e.g., video) or fixed (e.g., still images), and whether text or images. More specifically, it is expected that the display device of the embodiments described can be implemented in or associated with a variety of electronic devices, such as (but not limited to) mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, camcorders, game consoles, watches, clocks, calculators, television monitors, flat-panel displays, computer monitors, automotive displays (e.g., odometer displays, etc.), navigation systems, cockpit controls and / or displays, displays of camera views (e.g., displays of rearview cameras in vehicles), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging, and aesthetic structures (e.g., displays of images of a piece of jewelry), etc.

[0072] Exemplarily, the display device 1000 may be a liquid crystal display device (LCD), a Mini LED (Mini Light-Emitting Diode, Mini LED) display device, or a Micro LED (Micro Light-Emitting Diode, Micro LED) display device.

[0073] In some embodiments, as shown in FIG. 1 and FIG. 2 , the display device 1000 includes at least one display module 300 , and the display module 300 can realize image display.

[0074] In some examples, as shown in FIG1 , the display device 1000 may include a single display module 300. It will be appreciated that in other examples, as shown in FIG2 , the display device 1000 may include multiple display modules 300. That is, multiple display modules 300 are spliced ​​together to form the display device 1000. The display module 300 can be directly utilized to emit at least one of red, green, and blue light, enabling the display module 300 to achieve color display and display a preset pattern. Furthermore, the display device 1000 formed by splicing multiple display modules 300 can display a larger combined pattern.

[0075] The following description will be made by taking an example where the display device 1000 may include a plurality of display modules 300 .

[0076] FIG. 3 is a structural diagram of a display device according to some embodiments.

[0077] 3 , the display module 300 includes a backlight module 100 and a display panel 200. The display panel 200 is located on the light-emitting side of the backlight module 100. The backlight module 100 is used to provide light for the display panel 200 so that the display panel 200 can display images.

[0078] The display panel 200 mainly comprises an array substrate 210, a cell substrate 220, and a liquid crystal layer 230 disposed between the array substrate 210 and the cell substrate 220. In some examples, the cell substrate 220 may be a color filter (CF) substrate.

[0079] As can be understood, light can be emitted through the backlight module 100 and illuminate the liquid crystal layer 230. By adjusting the arrangement of the liquid crystal molecules in the liquid crystal layer 230, the intensity of light passing through the liquid crystal layer 230 can be adjusted, thereby adjusting the intensity of light irradiating the cell substrate 220. Since the cell substrate 220 is a color filter substrate, by adjusting the intensity of light irradiating the different color photoresist units, the display device 1000 can display color images.

[0080] In some examples, the display device 1000 may further include an anti-reflection film layer and a protective cover plate, with the anti-reflection film layer positioned between the display panel 200 and the protective cover plate. The anti-reflection film layer may include a polarizer, which may be a circular polarizer. The polarizer may reduce external light emission, preventing the display panel 200 from reflecting ambient light and causing glare.

[0081] FIG. 4 is a partial structural diagram of a display module according to some embodiments.

[0082] In some embodiments, as shown in FIG4 , the display module 300 includes a backlight module 100 and a display panel 200 , wherein the display panel 200 is located on the light-emitting side of the backlight module 100 .

[0083] The display panel 200 includes a display area (full name in English: Active Area, abbreviated as AA area; also referred to as an effective main functional area) AA and a peripheral area SA. The peripheral area SA is located on at least one side of the main display area AA (for example, one side; for example, all around, that is, including the upper and lower sides and the left and right sides). Among them, the display area AA includes a first display area AA1 and a second display area AA2, and the second display area AA2 is arranged around the first display area AA1. That is, the second display area AA2 is located between the first display area AA1 and the peripheral area SA. Furthermore, the second display area AA2 can be the edge area of ​​the display area AA close to the peripheral area SA. The specific range of the second display area AA2 will be defined below.

[0084] The backlight module 100 includes a middle frame 10 and a back plate 20 .

[0085] The back plate 20 includes a bottom plate 21 and side plates 22 . The bottom plate 21 of the back plate 20 is opposite to the display panel 200 . The side plates 22 are arranged around the edges of the bottom plate 21 and are located on a side of the bottom plate 21 close to the display panel 200 .

[0086] The middle frame 10 is disposed on a side of the side plate 22 of the back plate 20 away from the bottom plate 21 , and the middle frame 10 and the back plate 20 cooperate with each other to enclose a cavity 30 .

[0087] For example, the orthographic projection of the side of the middle frame 10 away from the center of the cavity 30 on the bottom plate 21 roughly coincides with the orthographic projection of the boundary between the second display area AA2 and the peripheral area SA on the bottom plate 21. Based on this, the middle frame 10 is equivalent to being positioned around the edge of the display area AA1. In other words, the middle frame 10 is positioned along the edge of the display panel 200, thereby supporting the display panel 200.

[0088] It should be noted that due to certain uncontrollable errors (such as manufacturing process errors, equipment accuracy, and measurement errors), "substantially overlap" includes absolute overlap and approximate overlap. That is, the orthographic projection of the side of the middle frame 10 away from the center of the cavity 30 on the bottom plate 21 overlaps with the orthographic projection of the boundary between the second display area AA2 and the peripheral area SA on the bottom plate 21 by more than 95%. Alternatively, the orthographic projection of the side of the middle frame 10 away from the center of the cavity 30 on the bottom plate 21 can be considered to relatively "overlap" with the orthographic projection of the boundary between the second display area AA2 and the peripheral area SA on the bottom plate 21.

[0089] The orthographic projection of the middle frame 10 on the display panel 200 at least partially overlaps with the second display area AA2 , which may include the following two situations.

[0090] The first type: the orthographic projection of the middle frame 10 on the display panel 200 substantially overlaps with the second display area AA2 .

[0091] It should be noted that due to certain uncontrollable errors (such as manufacturing process errors, equipment accuracy, and measurement errors), "substantially overlapping" includes absolute overlap and approximate overlap. That is, if the orthographic projection of the middle frame 10 on the display panel 200 overlaps with the second display area AA2 by more than 95%, it can also be considered that the orthographic projection of the middle frame 10 on the display panel 200 relatively "overlaps" with the second display area AA2.

[0092] The second type: the orthographic projection of the middle frame 10 on the display panel 200 overlaps with the portion of the second display area AA2 away from the first display area AA1. In other words, the orthographic projection of the middle frame 10 on the display panel 200 overlaps with the portion of the second display area AA2 close to the peripheral area SA.

[0093] The boundary between the second display area AA2 and the first display area AA1 can be adjusted according to the different structures of the middle frame 10. However, no matter how it is adjusted, the second display area AA2 can be within the range of the orthographic projection of the middle frame 10 on the display panel 200.

[0094] In some examples, the display module 300 further includes a plurality of light-emitting units 40 . The plurality of light-emitting units 40 may be located in the cavity 30 , and the light-emitting units 40 may be used to provide light.

[0095] In some examples, the light emitting unit 40 may be a light emitting diode (LED). A light emitting diode (eg, Micro LED, Mini LED, etc.) may emit light to directly display a pattern.

[0096] In some examples, the light-emitting diode may be a micro light-emitting diode (Micro LED) or a mini light-emitting diode (Mini LED).

[0097] Exemplarily, the light emitting diodes may be light emitting units 40 that can emit light of the same color, for example, they may all be blue LEDs, red LEDs, green LEDs, yellow LEDs, or white LEDs.

[0098] For example, the LEDs may include LEDs of multiple different colors, such as at least two of red, green, blue, and yellow LEDs, and the LEDs of different colors may be independently controlled. Thus, the display device 1000 may perform color display by mixing light.

[0099] In some examples, the backlight module 100 further includes a lens T, which is located on a side of the light emitting unit 40 close to the display panel 200. In this regard, the lens T can be used to converge light and even out light.

[0100] However, the inventors have found that the brightness of the second display area AA2 of the display module 300 is low and significantly lower than that of the first display area AA1. In other words, the corners and edges of the display module 300 appear dark.

[0101] Furthermore, when a plurality of the display modules 300 are spliced ​​together to form a display device 1000 , two adjacent display modules 300 both have a dark frame problem, which causes the width of the dark frame in the spliced ​​display device 1000 to double, affecting the display effect of the display device 1000 .

[0102] After in-depth research, the inventors of the present disclosure found that the reasons for the above-mentioned uneven display brightness problem include poor structural design of the middle frame. Due to the ultra-narrow frame design, the design of the edge structure of the middle frame will affect the amount of incident light, thereby resulting in poor image quality at the edge of the spliced ​​screen.

[0103] Specifically, some of the light emitted by the multiple light-emitting units 40 can directly enter the second display area AA2 without being reflected by the middle frame 10. However, due to the presence of the middle frame 10, some of the light that should have entered the second display area AA2 is reflected back to the first display area AA1. As a result, the brightness of the second display area AA2 is reduced, and the brightness of the second display area AA2 is significantly lower than that of the first display area AA1. This can cause a dark frame to appear in the display module 300.

[0104] Based on this, the display module 300 provided in the embodiment of the present disclosure has a middle frame 10 including a support portion Z. The support portion Z is located between the display panel 200 and the bottom plate 21. The support portion Z includes an inner wall surface 11 located within the cavity 30. The inner wall surface 11 includes a reflective surface 111 disposed toward the display panel 200. Specifically, the reflective surface 111 is opposite the second display area AA2.

[0105] The end of the reflective surface 111 away from the bottom plate 21 is farther from the center of the cavity 30 than the end of the reflective surface 111 close to the bottom plate 21. That is, the inner wall 11 extends from the junction of the second display area AA2 and the peripheral area SA to the bottom plate 21 to form an inclined reflective surface 111.

[0106] The structure of the middle frame 10 is adjusted so that a portion of the light emitted by the multiple light-emitting units 40 is reflected by the reflective surface 111 toward the second display area AA2, thereby increasing the brightness of the second display area AA2. Specifically, a brightness ratio of the second display area AA2 to the first display area AA1 can be achieved that is greater than or equal to 0.85. When the brightness ratio of the second display area AA2 to the first display area AA1 is equal to or close to 0.85, the brightness difference between the second display area AA2 and the first display area AA1 is small, making the lower brightness of the second display area AA2 less noticeable to the human eye, thereby improving the dark frame problem of the display module 300.

[0107] It should be noted that since the cavity 30 is formed by the cooperation between the middle frame 10 and the back panel 20, the central area of ​​the cavity 30 can also be understood as the central area of ​​the space formed by the bottom panel 21 and the side panels 22 in the back panel 20. Furthermore, the orthographic projection of the first display area AA1 on the backlight module 100 is located within the central area of ​​the cavity 30.

[0108] In some examples, the brightness ratio of the second display area AA2 to the first display area AA1 is greater than or equal to 0.9, so that more light that should originally enter the second display area AA2 can enter the second display area AA2, thereby further improving the brightness of the second display area AA2, reducing the brightness difference between the second display area AA2 and the first display area AA1, and improving the situation where dark frames appear in the display module 300.

[0109] To summarize, in the display module 300 provided in the embodiment of the present disclosure, the structure of the middle frame 10 is adjusted so that part of the light emitted by the plurality of light-emitting units 40 is reflected to the second display area AA2 via the reflective surface 111, thereby increasing the brightness of the second display area AA2, achieving a brightness ratio of the second display area AA2 to the first display area AA1 greater than or equal to 0.9, reducing the brightness difference between the second display area AA2 and the first display area AA1, and improving the situation where dark frames appear in the display module 300.

[0110] In some embodiments, the material of the middle frame 10 can include any one of plastic, aluminum profile, or iron plate. For the purpose of this description, the middle frame 10 is described as being made of plastic. In this case, the middle frame 10 can be made of white plastic, which can ensure that the reflective surface 111 of the middle frame 10 has a reflectivity of over 80%.

[0111] Based on this, the reflective surface 111 of the middle frame 10 can be used to reflect part of the light emitted by the multiple light-emitting units 40 to the second display area AA2, so as to improve the brightness of the second display area AA2, reduce the brightness difference between the second display area AA2 and the first display area AA1, and improve the situation where dark frames appear in the display module 300.

[0112] In other examples, when the middle frame 10 is made of aluminum or iron, a reflective film may be formed on the reflective surface 111 of the middle frame 10. That is, a reflective film is formed on a side of the middle frame 10 close to the cavity 30 to form the reflective surface 111 of the middle frame 10.

[0113] In summary, the reflective surface 111 of the middle frame 10 can be directly formed integrally with the middle frame 10 , or can be formed by attaching a reflective film.

[0114] In some embodiments, the backplate 20 can be made of a metal material. For example, the backplate 20 can be made of at least one of aluminum, electrogalvanized steel (SECC), or hot-dip galvanized steel (SGCC). This allows the backplate 20 to have both improved support and heat dissipation.

[0115] In some embodiments, the display module 300 further includes a front housing U. The front housing U is located in the peripheral area SA and can be engaged with the back plate 20 to fix the display panel 200 and the backlight module 100 .

[0116] In some examples, the material of the front housing U can include any one of electrogalvanized steel sheet (SECC), hot-dip galvanized steel sheet (SGCC), stainless steel (SUS304), or plastic, which can increase the stability of the display module 300 while achieving a narrow bezel. However, the embodiments of the present disclosure are not limited to this. It is understood that in other examples, the material of the front housing U can also be black appearance tape.

[0117] In some embodiments, as shown in FIG4 , the backlight module 100 further includes a diffuser plate 50, which is located between the middle frame 10 and the display panel 200. The middle frame 10 abuts against the diffuser plate 50, so that the middle frame 10 supports the diffuser plate 50, and thus the middle frame 10 can also support the display panel 200.

[0118] In some examples, the material of the diffusion plate 50 may include at least one of glass, polystyrene (PS), or polycarbonate (PC).

[0119] When a plastic substrate is used as the base material for the diffuser plate 50, specifically polystyrene (PS), due to the large expansion coefficient of the plastic substrate, space must be reserved within the display module 300 to accommodate the plastic substrate's space requirements. However, since the diffuser plate 50 is not positioned within the expansion space, light cannot enter the expansion space. Consequently, a dark frame will form at the location of the expansion space, exacerbating the dark frame problem within the display module 300.

[0120] Based on this, in some other examples, the diffuser plate 50 may include a glass substrate and an optical film located on a side of the glass substrate facing away from the middle frame 10 .

[0121] When a glass substrate is used as the base for the diffuser plate 50, there is no need to reserve expansion space for the diffuser plate 50 in the display module 300. This prevents the widening of the dark frame in the display module 300 due to the presence of expansion space. In other words, using a glass substrate as the base for the diffuser plate 50 can alleviate the dark frame problem in the display module 300 to a certain extent. The glass diffuser plate 50 can be printed with diffused ink on either one or both sides.

[0122] In some examples, the optical film includes a diffuser and a brightness enhancement film laminated on a glass substrate. Thus, the brightness enhancement film in the optical film can be used to increase the brightness of the surface light source in the backlight module 100. Furthermore, the diffuser in the optical film can be used to increase the uniformity of the surface light source in the backlight module 100.

[0123] In some examples, the brightness enhancement film includes two types: a prism film (Brightness Enhanced Film, abbreviated as: BEF) and an optical brightness enhancement film (Double Brightness Enhanced Film, abbreviated as: DBEF). However, the embodiments of the present disclosure are not limited thereto.

[0124] Taking the DBEF optical brightening film as an example, the DBEF optical brightening film can be fully bonded to the glass substrate to prevent the problem of bright edges caused by the optical film not being bonded.

[0125] In some embodiments, as shown in FIG. 4 , the backlight module 100 further includes a reflective layer 60 . The reflective layer 60 is located on a side of the back plate 20 close to the display panel 200 .

[0126] The light emitted by the light-emitting unit 40 may be reflected by other structures in the backlight module 100 and not emitted from the backlight module 100, but instead emitted toward the side of the bottom plate 21. In this case, since the side of the bottom plate 21 of the backplate 20 close to the display panel 200 is provided with a reflective layer 60, the reflective layer 60 can reflect the light emitted by the light-emitting unit 40 toward the light output direction of the display module, thereby improving the light efficiency of the display module.

[0127] The reflective layer 60 includes a plurality of openings W, and the light-emitting units 40 are located within the openings W. For example, one light-emitting unit 40 is located within one opening W. The light-emitting unit 40 being located within the opening W can be understood as the orthographic projection of the light-emitting unit 40 on the reflective layer 60 is located within the boundary of the opening W, and there is a gap between the orthographic projection of the light-emitting unit 40 on the reflective layer 60 and the boundary of the opening W.

[0128] Based on this, the light emitting unit 40 can be prevented from contacting with the reflective layer 60 and thus preventing a cold solder joint from occurring, thereby facilitating improvement in the quality of the display module.

[0129] In some examples, the reflectivity of the reflective layer 60 is greater than or equal to 90%.

[0130] When the reflectivity of the reflective layer 60 is equal to or close to 90%, the light emitted by the light emitting unit 40 can be reflected toward the light emitting direction of the display module to improve the utilization rate of the light emitted by the light emitting unit 40 and thus improve the light efficiency of the display module.

[0131] In some examples, the reflectivity of reflective layer 60 is greater than or equal to 95%.

[0132] When the reflectivity of the reflective layer 60 is equal to or close to 95%, the reflectivity of the reflective layer 60 is relatively high, and more light can be reflected to improve the light efficiency of the display module.

[0133] In some examples, the side of the reflective layer 60 close to the display panel includes a plurality of small bumps. When light is irradiated onto the small bumps on the reflective layer 60, the light can be diffusely reflected, thereby improving the uniformity of the brightness of the display module.

[0134] In some examples, the reflective layer 60 may be white, thereby achieving a higher reflectivity.

[0135] For example, the reflective layer 60 may be made of white ink to achieve high reflectivity. The white ink may include, for example, a resin (e.g., epoxy resin, polytetrafluoroethylene resin), titanium dioxide (chemical formula TiO2), and an organic solvent (e.g., dipropylene glycol methyl ether).

[0136] For example, the material of the reflective layer 60 may further include silicone white glue. In the case where the material of the reflective layer 60 includes white ink or silicone white glue, the reflective layer 60 may be formed by printing the white ink or silicone white glue using a screen printing process.

[0137] The following description will be made by taking the reflective layer 60 having a reflectivity greater than or equal to 95% and having no small protrusions as an example.

[0138] The above embodiment describes a reflective layer 60 that can be a separate reflective sheet, mounted on the side of the base plate 21 closest to the display panel 200. However, the disclosed embodiments are not limited thereto. It is understood that the reflective layer 60 can also include other structures. For example, the reflective layer can be applied to the surface of the base plate 21 closest to the display panel 200. Alternatively, the reflective layer can be applied to the light-emitting substrate having the light-emitting units 40.

[0139] The reflective layer 60 described in any of the above embodiments can be configured in two ways. First, the reflective layer 60 can be bent until it is fixedly connected to the side panels 22 of the back panel 20. Second, without bending the reflective layer 60, the structure of the support portion Z of the middle frame 10 can be adjusted to extend it to abut against the reflective layer 60. First, the first configuration of the reflective layer 60 will be described.

[0140] 4 , a first configuration of the reflective layer 60 is described. The reflective layer 60 includes a main body 62 and a first bending portion 61 . The first bending portion 61 is a portion of the reflective layer 60 that bends toward the display panel 200 .

[0141] Among them, the main body 62 is parallel to the display panel 200, the main body 62 includes an opening W, the first bending portion 61 is perpendicular to the display panel 200, and the first bending portion 61 is close to the side of the display panel 200, is arranged on the side of the middle frame 10 close to the cavity 30, and is fixedly connected to the middle frame 10.

[0142] As shown in the above structure, the first bent portion 61 of the reflective layer 60 is bent perpendicular to the main body 62, so that the bent first bent portion 61 is parallel to the surface of the side of the middle frame 10 near the center area of ​​the cavity 30. The side of the first bent portion 61 near the display panel 200 includes a first overlapping portion 611.

[0143] Based on this, after the reflective layer 60 is bent, the first overlapping portion 611 of the reflective layer 60 can be moved to the side surface of the middle frame 10 close to the cavity 30, and the first overlapping portion 611 is set to be connected to the side surface of the middle frame 10 close to the cavity 30, thereby fixing the reflective layer 60 and the middle frame 10.

[0144] In some examples, the support portion Z of the middle frame 10 further includes a second portion 10B, which is located on a side of the first portion 10A facing away from the display panel 200. The second portion 10B includes a first extension surface 112 connected to the reflective surface 111 of the first portion 10A. The second portion 10B is perpendicular to the display panel 200. That is, the first extension surface 112 of the second portion 10B is perpendicular to the display panel 200.

[0145] Based on this, the first overlapping portion 611 of the first bending portion 61 can be set on one side of the second portion 10B close to the central area of ​​the cavity 30, so that the first overlapping portion 611 is connected to the first extension surface 112 of the second portion 10B to fix the reflective layer 60 and the middle frame 10.

[0146] 4 , along the first direction X, the first overlapping portion 611 of the first bent portion 61 overlaps the first extension surface 112 . That is, along the first direction X, the area where the first bent portion 61 overlaps the first extension surface 112 is the first overlapping portion 611 .

[0147] Based on this, the length of the first overlapping portion 611 can be set to be greater than or equal to 5 mm in the direction (second direction Y) along the bottom plate 21 of the back plate 20 pointing to the display panel 200. In other words, the length of the overlapping area of ​​the first bent portion 61 and the first extension surface 112 in the second direction Y is set to be greater than or equal to 5 mm.

[0148] When the length of the first overlapping portion 611 of the first bending portion 61 is equal to or close to 5 mm along the second direction Y, the overlapping area between the first bending portion 61 and the first extension surface 112 is larger, which is beneficial to increasing the contact area between the first bending portion 61 and the first extension surface 112, thereby facilitating improving the stability of the fixed connection between the reflective layer 60 and the first extension surface 112.

[0149] Based on this, the contact area between the first bent portion 61 and the first extension surface 112 can be further increased, thereby facilitating improved stability of the fixed connection between the first bent portion 61 and the first extension surface 112. In addition, due to the larger contact area between the first bent portion 61 and the first extension surface 112, the adhesion between the first bent portion 61 and the first extension surface 112 can be ensured, preventing the first bent portion 61 of the reflective layer 60 from falling off the first extension surface 112 of the middle frame 10, and further ensuring the stability of the fixed connection between the first bent portion 61 and the first extension surface 112.

[0150] For example, the length of the first overlapping portion 611 along the second direction Y is approximately 5 mm, 6 mm, 8 mm, or 10 mm. However, the embodiments of the present disclosure are not limited thereto. In other embodiments, the maximum length of the first overlapping portion 61 can be approximately the distance between the bottom plate 21 and the side of the reflective surface 111 closer to the bottom plate along the second direction Y.

[0151] It is understood that the length of the first overlapping portion 611 along the second direction Y is approximately 8 mm. Due to certain uncontrollable errors (such as manufacturing process errors, equipment accuracy, measurement errors, etc.), when the length of the first overlapping portion 611 along the second direction Y fluctuates within the range of ±10%×8 mm, it can be considered that the length of the first overlapping portion 611 along the second direction Y is equal to 8 mm.

[0152] The first overlapping portion 611 and the first extension surface 112 overlap, which may include the following two situations.

[0153] The first type: along the first direction X, the first overlapping portion 611 overlaps a portion of the first extension surface 112 close to the bottom plate 21 . In other words, the first bending portion 61 of the reflective layer 60 is extended to overlap the first extension surface 112 of the middle frame 10 .

[0154] The second type: along the first direction X, the first overlapping portion 611 of the first bending portion 61 overlaps with the first extension surface 112 . That is, the first extension surface 112 is located within the boundary of the orthographic projection of the first bending portion 61 on the middle frame 10 .

[0155] Therefore, the second method can further increase the overlapping area between the first bending portion 61 and the first extension surface 112 in the first direction X relative to the first method, and further increase the contact area between the first bending portion 61 and the first extension surface 112, thereby facilitating improving the stability of the fixed connection between the reflective layer 60 and the first extension surface 112.

[0156] In some examples, the second portion 10B of the middle frame 10 can be extended to be flush with the main portion 62 of the reflective layer 60. Alternatively, the second portion 10B of the middle frame 10 can be extended to abut against the bottom plate 21. In other words, the first extension surface 112 of the middle frame 10 can be extended to be flush with the main portion 62 of the reflective layer 60, or the first extension surface 112 of the middle frame 10 can be extended to abut against the bottom plate 21.

[0157] The above embodiment mainly describes, in conjunction with Figure 4, a method of bending a portion of the reflective layer 60 to connect with the inner wall surface 11 of the middle frame 10. Another configuration method of the reflective layer 60 will be described below in conjunction with Figure 5.

[0158] FIG5 is a partial structural diagram of a display module according to some other embodiments.

[0159] In some embodiments, as shown in FIG5 , the support portion Z of the middle frame 10 further includes a second portion 10B. The second portion 10B is located on a side of the first portion 10A facing away from the display panel 200. The second portion 10B includes a second extended surface 113 connected to the reflective surface 111 of the first portion 10A. The second portion 10B of the middle frame 10 is arranged to abut against a side of the reflective layer 60 that is closer to the middle frame 10.

[0160] As shown in the above structure, the second portion 10B of the middle frame 10 overlaps with the side of the reflective layer 60 close to the middle frame 10 along the second direction Y. The side of the second portion 10B facing away from the display panel 200 is arranged to abut against the side of the reflective layer 60 close to the middle frame 10, which is equivalent to using the second portion 10B of the middle frame 10 to press the side of the reflective layer 60 close to the middle frame 10.

[0161] Based on this, it can not only fix the middle frame 10 and the reflective layer 60, but also prevent the reflective layer 60 from warping on the side close to the middle frame 10, thereby improving the stability of the connection between the middle frame 10 and the reflective layer 60.

[0162] FIG6 is a partial structural diagram of a display module according to some other embodiments.

[0163] In some embodiments, as shown in FIG6 , the support portion Z of the middle frame 10 further includes a second portion 10B, which is located on a side of the first portion 10A facing away from the display panel 200. The second portion 10B includes a second extended surface 113 connected to the reflective surface 111 of the first portion 10A. The middle frame 10 further includes an abutting portion 101, which is located on a side of the second portion 10B facing away from the first portion 10A. The side of the abutting portion 101 facing away from the display panel 200 abuts against a side of the reflective layer 60 closer to the middle frame 10.

[0164] That is, the difference between the middle frame 10 shown in FIG. 6 and the middle frame 10 shown in FIG. 5 is that the middle frame 10 shown in FIG. 6 further includes an abutting portion 101 close to the side of the reflective layer 60 .

[0165] Along the second direction Y, the abutting portion 101 of the middle frame 10 overlaps with the side of the reflective layer 60 close to the middle frame 10. The side of the abutting portion 101 facing away from the display panel 200 is arranged to abut against the side of the reflective layer 60 close to the middle frame 10, which is equivalent to using the abutting portion 101 of the middle frame 10 to press the side of the reflective layer 60 close to the middle frame 10.

[0166] Based on this, it can not only fix the middle frame 10 and the reflective layer 60, but also prevent the reflective layer 60 from warping on the side close to the middle frame 10, thereby improving the stability of the connection between the middle frame 10 and the reflective layer 60.

[0167] In some embodiments, as shown in FIG6 , the second portion 10B of the middle frame 10 protrudes toward one side of the central region of the cavity 30. In this case, the second extended surface 113 gradually moves away from the central region of the cavity 30, from the side closest to the reflective surface 111 to the side closest to the reflective layer 60. This reduces the space occupied by the middle frame 10 in the cavity 30, facilitating flexibility in the placement of components within the backlight module 100. Furthermore, the spacing between the second extended surface 113 and the side panel 22 can be increased, facilitating placement of other components in the space formed between the second extended surface 113 and the side panel 22.

[0168] In the above structure, to ensure the contact area between the abutting portion 101 of the middle frame 10 and the reflective layer 60, the abutting portion 101 of the middle frame 10 can be arranged to face away from the central area of ​​the cavity 30 and to be coplanar with the side of the second portion 10B of the middle frame 10 in the central area of ​​the cavity 30. The abutting portion 101 of the middle frame 10 is also arranged to extend toward the side of the central area of ​​the cavity 30. This increases the area of ​​the abutting portion 101 of the middle frame 10 and the contact area between the abutting portion 101 of the middle frame 10 and the reflective layer 60, thereby improving the stability of the connection between the middle frame 10 and the reflective layer 60.

[0169] In some embodiments, as shown in FIG6 , the length of the abutting portion 101 of the middle frame 10 along the first direction X ranges from 1 mm to 5 mm. Therefore, the length of the contact area between the abutting portion 101 of the middle frame 10 and the reflective layer 60 along the first direction X is equivalent to setting the range from 1 mm to 5 mm.

[0170] When the length of the abutting portion 101 of the middle frame 10 along the first direction X is equal to or close to 1 mm, the length of the contact area between the abutting portion 101 of the middle frame 10 and the reflective layer 60 is equal to or close to 1 mm. This can not only improve the stability of the connection between the middle frame 10 and the reflective layer 60, but also prevent the abutting portion 101 of the middle frame 10 from being too large in size and covering too large an area of ​​the reflective layer 60, thereby affecting the reflective effect of the reflective layer 60 in the backlight module 100.

[0171] When the length of the abutting portion 101 of the middle frame 10 along the first direction X is equal to or close to 5 mm, the length of the contact area between the abutting portion 101 of the middle frame 10 and the reflective layer 60 is equal to or close to 5 mm. This can ensure that the abutting portion 101 of the middle frame 10 does not significantly affect the reflective effect of the reflective layer 60 in the backlight module 100, and can also increase the contact area between the abutting portion 101 of the middle frame 10 and the reflective layer 60, thereby improving the stability of the connection between the middle frame 10 and the reflective layer 60.

[0172] For example, along the first direction X, the length of the abutting portion 101 of the middle frame 10 is approximately 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, or 5 mm. However, the embodiments of the present disclosure are not limited thereto.

[0173] It is understood that, in the description, an example is given in which the length of the abutting portion 101 of the middle frame 10 along the first direction X is approximately 1 mm. Due to certain uncontrollable errors (such as manufacturing process errors, equipment accuracy, measurement errors, etc.), when the length of the abutting portion 101 of the middle frame 10 along the first direction X fluctuates within a range of ±10%×1 mm, it can be considered that the length of the abutting portion 101 of the middle frame 10 along the first direction X is equal to 1 mm.

[0174] The middle frame 10 described above with reference to Figures 5 and 6 is configured with a second portion 10B protruding toward the center of the cavity 30. However, in other embodiments, the middle frame 10 described in Figures 5 and 6 can be modified so that the second portion 10B of the middle frame 10 is perpendicular to the display panel 200. The following will use specific simulation data to verify whether the structure of the second portion 10B of the middle frame 10 affects the dark frame in the display module 300.

[0175] FIG. 7 is a light path diagram corresponding to when the second portion of the middle frame is a flat surface and a curved surface according to some embodiments.

[0176] As shown in Figures 5 to 7 , the second portion 10B of the middle frame 10 in the display module 300 provided in this embodiment is either perpendicular to the display panel 200 or protrudes toward the center area of ​​the cavity 30. Because the second portion 10B of the middle frame 10 is located on the side of the first portion 10A facing away from the display panel 200, light reflected from the second extended surface 113 of the second portion 10B of the middle frame 10 is emitted toward the side facing away from the peripheral area SA and enters the first display area AA1, with minimal impact on the brightness of the second display area AA2 of the display module 300. In other words, regardless of whether the second extended surface 113 of the second portion 10B is flat or curved, light reflected from it will enter the first display area AA1.

[0177] Therefore, it can be seen that the structure of the second portion 10B of the middle frame 10 in the display module 300 provided in some embodiments of the present disclosure can be adjusted according to the space in the backlight module 100 to determine whether the second portion 10B of the middle frame 10 needs to be set, regardless of whether it protrudes toward the central area of ​​the cavity 30, so as to meet the space requirements of the backlight module 100.

[0178] Figure 8 is a graph showing simulation results of the display brightness of a display module when the second extended surface of the middle frame is a curved surface according to some embodiments. Figure 9 is a line graph showing the display brightness of a display module when the second extended surface of the middle frame is a curved surface according to some embodiments. Figure 10 is a graph showing simulation results of the display brightness of a display module when the second extended surface of the middle frame is a flat surface according to some embodiments. Figure 11 is a line graph showing the display brightness of a display module when the second extended surface of the middle frame is a flat surface according to some embodiments. The abscissas of Figures 8 to 11 represent the distance from the peripheral area SA, with larger abscissa values ​​indicating closer proximity to the center of the display area AA.

[0179] The horizontal axis of -100 mm indicates that the position is at the boundary between the peripheral area SA and the second display area AA2, and the horizontal axis of -95 mm indicates that the position is 5 mm away from the boundary between the peripheral area SA and the second display area AA2.

[0180] As shown in Figures 8 to 11 , based on the simulation results of the display module's display brightness, it can be seen that when the second extension surface 113 of the middle frame 10 is a flat or curved surface, it has little effect on the display module's display brightness curve. Therefore, the structure of the second portion 10B of the middle frame 10 in the display module 300 provided in some embodiments of the present disclosure can be adjusted based on the space within the backlight module 100 to determine whether the second portion 10B of the middle frame 10 is required to protrude toward the center of the cavity 30, thereby meeting the space requirements of the backlight module 100.

[0181] In some embodiments, as shown in FIG. 4 and FIG. 6 , the middle frame 10 further includes a limiting groove R on one side of the bottom plate 21 close to the back plate 20 , and the side plate 22 of the back plate 20 may be arranged to be located in the limiting groove R.

[0182] The above structure is equivalent to bending the side panels 22 of the back panel 20 to engage with the limiting grooves R. Based on this, the back panel 20 and the middle frame 10 can be fixed, and the stability of the connection between the back panel 20 and the middle frame 10 can be improved.

[0183] In some examples, the middle frame 10 further includes an outer wall surface 13 located outside the cavity 30 , and a side of the outer wall surface 13 facing away from the central area of ​​the cavity 30 includes an outer surface 131 , and the outer surface 131 is perpendicular to the display panel 200 .

[0184] The inner wall surface 11 further includes a first surface 114 facing the side plate 22, and the outer wall surface 13 further includes a second surface 132 facing the side plate 22. The first surface 114 and the second surface 132 can serve as two side wall surfaces of the limiting groove R.

[0185] As described above, when the side panels 22 of the back panel 20 are bent into the limiting grooves R, it is equivalent to bending the side panels 22 of the back panel 20 between the first surface 114 and the second surface 132 to fix the back panel 20 and the middle frame 10 .

[0186] The above describes the structure of the display module 300 and how to improve the dark frame problem of the display module 300 by adjusting the structure of the middle frame 10. The following will describe how to adjust the structure of the middle frame 10 in detail with reference to the relevant drawings.

[0187] Fig. 12 is a partial enlarged view of Q in Fig. 4. The structure of the middle frame 10 shown in Figs. 5 and 6 on the side close to the display panel is also shown in Fig. 12.

[0188] In some embodiments, as shown in Figures 4, 6 and 12, the first part 10A of the middle frame 10 also includes a supporting part 10A1 close to the side of the display panel 200, and the side of the supporting part 10A1 close to the display panel 200 includes a supporting surface 12, which can be used to connect the reflective surface 111 in the inner wall surface 11 and the outer surface 131 in the outer wall surface 13.

[0189] The supporting surface 12 of the carrying portion 10A1 abuts against the diffuser plate 50 , so that the supporting surface 12 of the middle frame 10 supports the diffuser plate 50 and the display panel.

[0190] In some examples, the support surface 12 of the supporting portion 10A1 may be an arc surface convex toward the display panel 200. That is, the orthographic projection of the support surface 12 of the supporting portion 10A1 on the first virtual plane is an arc. The first virtual plane is perpendicular to the display panel 200.

[0191] Based on this, the highest point of the support surface 12 of the supporting portion 10A1 of the middle frame 10 can be brought into contact with the diffuser 50, rather than the entire support surface 12 being in contact with the diffuser 50. Furthermore, the shielding of light within the second display area AA2 by the support surface 12 of the middle frame 10 can be relatively reduced, allowing more light to enter the second display area AA2 through the warped portion of the support surface 12. This improves the brightness of the second display area AA2, reduces the brightness difference between the second display area AA2 and the first display area AA1, and improves the dark frame problem of the display module 300.

[0192] In some embodiments, as shown in Figures 4, 6, and 12, the radius of the support surface 12 (arc surface) ranges from 1 mm to 5 mm. That is, the radius of the arc of the orthographic projection of the support surface 12 of the bearing portion 10A1 on the first virtual plane ranges from 1 mm to 5 mm.

[0193] When the radius of the support surface (arc surface) 12 is equal to or close to 1 mm, the corresponding radius of the support surface (arc surface) 12 is smaller. In this case, the curvature of the support surface (arc surface) 12 is greater, allowing more light to enter the second display area AA2 through the curved portion of the support surface (arc surface) 12, thereby improving the brightness of the second display area AA2. Furthermore, the support surface (arc surface) 12 can also meet the requirements of supporting the diffuser plate 50.

[0194] When the radius of the support surface (arc surface) 12 is equal to or close to 5 mm, the radius of the support surface (arc surface) 12 is relatively large. In this case, the curvature of the support surface (arc surface) 12 is relatively small, which increases the contact area between the support surface (arc surface) 12 and the diffuser plate 50 and improves the support force of the middle frame 10 on the diffuser plate 50. Alternatively, the support surface (arc surface) 12 can be curved relative to the diffuser plate 50, allowing light to enter the second display area AA2 through the curved portion of the support surface 12, thereby increasing the brightness of the second display area AA2.

[0195] Exemplarily, the radius of the support surface (arc surface) 12 is approximately 1 mm, 2 mm, 3 mm, 4 mm or 5 mm.

[0196] It should be noted that the example described herein uses a radius of approximately 3 mm for the support surface (arc surface). Due to certain uncontrollable errors (such as manufacturing process errors, equipment accuracy, and measurement errors), the radius of the support surface (arc surface) 12 can be considered to be 3 mm when the radius fluctuates within a range of ±10% × 3 mm.

[0197] In some embodiments, as shown in FIG. 4 to FIG. 6 , a first angle θ is formed between the extended surface of the inner wall surface 11 of the middle frame 10 and the display panel 200 . The first angle θ is greater than or equal to 50° and less than 90°.

[0198] When the first angle θ between the extended surface of the inner wall surface 11 of the middle frame 10 and the display panel 200 is greater than or equal to 50° and less than 90°, it is equivalent to the angle between the extended surface of the inner wall surface 11 of the middle frame 10 and the extended surface of the outer surface 131 of the middle frame 10 being less than or equal to 40° and greater than 0°.

[0199] Since the outer surface 131 of the middle frame 10 is perpendicular to the display panel 200 , when the first angle θ is greater than or equal to 50°, the inner wall surface 11 of the middle frame 10 is inclined more relative to the display panel 200 .

[0200] Based on this, some light can be reflected from the reflective surface 111 of the inner wall 11 of the middle frame 10 to the second display area AA2, thereby increasing the brightness of the second display area AA2. Therefore, the brightness of the second display area AA2 can be balanced with the brightness of the first display area AA1, reducing the difference between the two. This makes the lower brightness of the second display area AA2 less noticeable to the human eye, thereby improving the problem of dark frames appearing in the display module 300.

[0201] In some examples, a first angle θ between the extended surface of the inner wall surface 11 of the middle frame 10 and the display panel 200 is greater than or equal to 60° and less than 90°.

[0202] Such a setting is equivalent to making the angle between the extension surface of the inner wall surface 11 of the middle frame 10 and the extension surface of the outer surface 131 of the middle frame 10 less than or equal to 30° and greater than 0°, so that the inner wall surface 11 of the middle frame 10 is more inclined relative to the display panel.

[0203] Based on this, more light can be reflected to the second display area AA2 via the reflective surface 111 of the inner wall surface 11 of the middle frame 10 , thereby increasing the brightness of the second display area AA2 and improving the dark frame problem of the display module 300 .

[0204] For example, the first angle θ between the inner wall surface 11 of the middle frame 10 and the display panel 200 is approximately any one of 50°, 55°, 60°, 65°, 70°, 75°, 80°, or 85°. However, the present disclosure is not limited thereto.

[0205] It should be noted that the first angle θ is approximately 70°. Due to certain uncontrollable errors (such as manufacturing process errors, equipment accuracy, measurement errors, etc.), the first angle θ can also be considered to be equal to 70° when it fluctuates within the range of ±10% × 70°.

[0206] Figure 13 is a partial structural diagram of a middle frame according to some other embodiments, and Figure 14 is a partial structural diagram of a middle frame according to still other embodiments. Figures 13 and 14 illustrate the middle frame and its adjacent backplane as a single entity. Figure 15 is a light path diagram corresponding to a planar and curved reflective surface of the middle frame according to some embodiments, and Figure 16 is a light path diagram corresponding to a planar and curved reflective surface of the middle frame according to other embodiments.

[0207] In some embodiments, as shown in FIG13 , the reflective surface 111 of the inner wall 11 of the middle frame 10 is a flat surface. In this case, the reflective surface 111 gradually moves away from the center of the cavity 30 from the end away from the bottom plate 21 to the end closer to the bottom plate 21. As shown in FIG14 , the reflective surface 111 of the inner wall 11 of the middle frame 10 is an arc-shaped surface that convexly faces the center of the cavity 30. In this case, the distance between the reflective surface 111 from the end away from the bottom plate 21 to the end closer to the bottom plate 21 and the center of the cavity 30 first decreases and then increases.

[0208] As shown in Figure 15 , when light L near the middle frame 10 is irradiated toward the peripheral area SA, if the reflective surface 111 of the inner wall 11 of the middle frame 10 is a flat surface, the light L is not blocked by the middle frame 10, and the light L (first light L1) can be directly irradiated toward the side close to the peripheral area SA. That is, the light L (first light L1) can directly enter the second display area AA2. However, if the reflective surface 111 of the inner wall 11 of the middle frame 10 is a curved surface convex toward the center area of ​​the cavity 30, the light L is blocked by the middle frame, and the middle frame 10 reflects the light L, changing the path of the light L and transforming it into the second light L2. As a result, the light L cannot enter the second display area AA2. That is, the second light L2, after changing its path, cannot enter the second display area AA2 and instead enters the first display area AA1.

[0209] Thus, it can be seen that when the reflective surface 111 of the inner wall surface 11 of the middle frame 10 is a flat surface, when the reflective surface 111 of the inner wall surface 11 of the middle frame 10 is a curved surface convex toward the central area of ​​the cavity 30, more light will not be blocked by the middle frame, and more light can be incident on the second display area AA2, thereby improving the brightness of the second display area AA2.

[0210] As shown in FIG16 , when light L away from the middle frame 10 is directed toward the peripheral area SA, if the reflective surface 111 of the inner wall 11 of the middle frame 10 is a flat surface, the light L is reflected by the flat reflective surface 111 as a first light L1. After reflection, the first light L1 can enter the second display area AA2. However, if the reflective surface 111 of the inner wall 11 of the middle frame 10 is an arc-shaped surface convex toward the center of the cavity 30, the light L is reflected by the flat reflective surface 111 as a second light L2. After reflection, the second light L2 cannot enter the second display area AA2 and instead enters the first display area AA1.

[0211] Therefore, it can be seen that when the reflective surface 111 of the inner wall surface 11 of the middle frame 10 is a flat surface, when the reflective surface 111 of the inner wall surface 11 of the middle frame 10 is a curved surface convex toward the central area of ​​the cavity 30, more light can be incident on the second display area AA2 through the reflective surface 111, thereby improving the brightness of the second display area AA2.

[0212] Figure 17 is a graph showing simulation results of the display brightness of a display module when the reflective surface of the middle frame is flat according to some embodiments. Figure 18 is a line graph showing the display brightness of a display module when the reflective surface of the middle frame is flat according to some embodiments. Figure 19 is a graph showing simulation results of the display brightness of a display module when the reflective surface of the middle frame is curved according to some embodiments. Figure 20 is a line graph showing the display brightness of a display module when the reflective surface of the middle frame is curved according to some embodiments. The horizontal axes of Figures 17 to 20 represent the distance from the peripheral area SA, with larger horizontal axis values ​​indicating closer proximity to the center of the display area AA.

[0213] The horizontal axis of -100 mm indicates that the position is at the boundary between the peripheral area SA and the second display area AA2, and the horizontal axis of -95 mm indicates that the position is 5 mm away from the boundary between the peripheral area SA and the second display area AA2.

[0214] In conjunction with Figures 17 to 20 , the simulation results of the display module's display brightness show that when the reflective surface 111 of the inner wall 11 of the middle frame 10 is a flat surface, and when the reflective surface 111 relative to the inner wall 11 of the middle frame 10 is a curved surface convex toward the center of the cavity 30, the brightness of the second display area AA2 near the peripheral area SA is higher. In other words, when the reflective surface 111 of the inner wall 11 of the middle frame 10 is a flat surface, and when the reflective surface 111 relative to the inner wall 11 of the middle frame 10 is a curved surface convex toward the center of the cavity 30, the difference between the brightness of the second display area AA2 and the brightness of the first display area AA1 can be reduced, thereby effectively improving the problem of dark frames in the display module 300.

[0215] It can be seen from this that when the reflective surface 111 of the inner wall surface 11 of the middle frame 10 is a curved surface convex toward the central area of ​​the cavity 30, the improvement effect on the dark frame of the display module 300 is relatively less obvious compared to when the reflective surface 111 of the inner wall surface 11 of the middle frame 10 is a flat surface.

[0216] Based on this, some embodiments of the present disclosure can improve the improvement effect on the dark frame of the display module 300 by adjusting the curvature of the curved surface. Specifically, when the reflective surface 111 of the inner wall surface 11 of the middle frame 10 is a curved surface that convexly faces the center area of ​​the cavity 30, the corresponding radius of the curved surface can be set to be greater than or equal to 8 mm.

[0217] When the radius of the curved surface (reflective surface 111) is equal to or close to 8 mm, the curved surface (reflective surface 111) is less curved, allowing the curved surface to reflect more light toward the second display area AA2, thereby increasing the brightness of the second display area AA2. Consequently, the brightness of the second display area AA2 is balanced with that of the first display area AA1, minimizing the difference between the two. This makes the lower brightness of the second display area AA2 less noticeable to the human eye, thereby improving the dark frame problem of the display module 300.

[0218] In some examples, the corresponding radius of the curved surface (reflective surface 111 ) is greater than or equal to 10 mm.

[0219] When the corresponding radius of the curved surface (reflective surface 111) is equal to or close to 10 mm, the curved surface (reflective surface 111) is closer to a plane, which not only allows more light to be reflected to the second display area AA2, but also reduces the probability of the middle frame 10 blocking the light, so that more light can be directly incident on the second display area AA2 without being reflected by the middle frame.

[0220] The brightness of the second display area AA2 is increased, and the dark frame problem of the display module 300 is improved.

[0221] For example, the corresponding radius of the curved surface (reflecting surface 111) is approximately 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 15 mm, 20 mm, or 50 mm. However, the embodiments of the present disclosure are not limited thereto. The larger the corresponding radius of the curved surface (reflecting surface 111), the closer the curved surface (reflecting surface 111) is to a plane.

[0222] It should be noted that the example below uses a corresponding radius of approximately 15 mm for the curved surface (reflecting surface 111). Due to certain uncontrollable errors (such as manufacturing process errors, equipment accuracy, and measurement errors), the corresponding radius of the curved surface (reflecting surface 111) can be considered to be 15 mm when it fluctuates within a range of ±10% × 15 mm.

[0223] Figure 21 is a partial structural diagram of the middle frame according to some further embodiments, and Figure 22 is a partial structural diagram of the middle frame according to some further embodiments. In Figures 21 and 22, the middle frame and the adjacent backplane are shown as a single entity. Figure 23 is a light path diagram corresponding to the first pitch of the middle frame of some embodiments being 4.8mm and 2.2mm, and Figure 24 is a light path diagram corresponding to the first pitch of the middle frame of other embodiments being 4.8mm and 2.2mm.

[0224] It should be noted that this embodiment verifies whether the first spacing D corresponding to the middle frame 10 affects the dark frame condition of the display module. Therefore, this embodiment involves two middle frames, and except for the first spacing D, all other parameters are the same. For example, the first angle corresponding to both middle frames is 65°.

[0225] In some embodiments, as shown in Figures 21 and 22 , along the first direction X, the minimum distance between the end of the reflective surface 111 away from the display panel 200 and the outer surface 131 is a first distance D, and the first distance D is less than or equal to 5 mm. Because the end of the reflective surface 111 away from the bottom plate 21 is farther from the center of the cavity 30 than the end of the reflective surface 111 closer to the bottom plate 21, the distance between the end of the reflective surface 111 away from the bottom plate 21 and the outer surface 131 is the largest. Setting the first distance D between the end of the reflective surface 111 away from the display panel 200 and the outer surface 131 along the first direction X to be less than or equal to 5 mm is equivalent to narrowing the overall width of the middle frame 10 in the first direction X. This can prevent more reflected light from being blocked by the middle frame, allowing more light to enter the second display area AA2, thereby improving the brightness of the second display area AA2.

[0226] When the first distance D is equal to or close to 5 mm, more reflected light will not be blocked by the middle frame, so that more light can enter the second display area AA2, thereby improving the brightness of the second display area AA2 and improving the dark frame problem of the display module 300.

[0227] In some examples, the first distance D is less than or equal to 4 mm.

[0228] When the first distance D is equal to or close to 4 mm, the width of the middle frame 10 can be made narrower, which can further reduce the light blocking effect of the middle frame 10, thereby allowing more light to enter the second display area AA2, thereby increasing the brightness of the second display area AA2 and improving the dark frame problem of the display module 300.

[0229] For example, the first distance D is approximately any one of 5 mm, 4.5 mm, 4 mm, 3.5 mm, 3 mm, or 2.5 mm. However, the embodiments of the present disclosure are not limited thereto.

[0230] It should be noted that the first spacing D is approximately 4 mm. Due to certain uncontrollable errors (such as manufacturing process errors, equipment accuracy, measurement errors, etc.), when the first spacing D fluctuates within the range of ±10% × 4 mm, it can also be considered that the first spacing D is equal to 4 mm.

[0231] FIG23 illustrates a light path diagram corresponding to the middle frame 10 when the first distance D is equal to 4.8 mm, and a light path diagram corresponding to the middle frame 10 when the first distance D is equal to 2.2 mm.

[0232] When light L near the middle frame 10 is irradiated toward the peripheral area SA, if the first distance D corresponding to the middle frame 10 is 4.8 mm, the light L is reflected by the reflective surface 111 as a third light L3. If the first distance D corresponding to the middle frame 10 is 2.2 mm, the light L is reflected by the reflective surface 111 as a fourth light L4.

[0233] As shown in Figures 4 and 6, as well as Figure 23, the fourth light L4 and the third light L3 formed after reflection do not emit toward the peripheral area SA. Therefore, the value of the first distance D corresponding to the middle frame 10 has little effect on the brightness of the second display area AA2 of the display module.

[0234] However, when the light in the backlight module 100 is incident on the reflective surface of the middle frame 10 multiple times, the light L is reflected by the reflective surface 111 as a third light L3. When the first distance D corresponding to the middle frame 10 is equal to 2.2 mm, the light L is reflected by the reflective surface 111 as a fourth light L4.

[0235] As shown in Figures 4 and 6, as well as Figure 24, when the reflected light of the light L is reflected toward the side close to the peripheral area SA and the first spacing D is equal to 4.8 mm, the reflected light of the light L is blocked by the middle frame 10, and the middle frame 10 will reflect the light, thereby changing the path of the reflected light of the light L and changing it to the third light L3. As a result, the reflected light of the light L cannot enter the second display area AA2. In other words, the third light L3 after the path is changed cannot enter the second display area AA2, but will enter the first display area AA1. When the first spacing D is equal to 2.2, the reflected light of the light L (the fourth light L4) is not blocked by the middle frame 10, and the fourth light L4 can be directly irradiated toward the side close to the peripheral area SA. In other words, the fourth light L4 can directly enter the second display area AA2.

[0236] It can be seen that when the first distance D corresponding to the middle frame 10 is smaller, more reflected light will not be blocked by the middle frame, and more light can enter the second display area AA2 to improve the brightness of the second display area AA2.

[0237] Figure 25 shows simulation results of the display brightness of the display module when the first spacing of the middle frame is equal to 4.8mm according to some embodiments. Figure 26 shows a line graph of the display brightness of the display module when the first spacing of the middle frame is equal to 4.8mm according to some embodiments. Figure 27 shows simulation results of the display brightness of the display module when the first spacing of the middle frame is equal to 2.2mm according to some embodiments. Figure 28 shows a line graph of the display brightness of the display module when the first spacing of the middle frame is equal to 2.2mm according to some embodiments. The abscissas of Figures 25 to 28 represent the distance from the peripheral area SA, and larger abscissa values ​​indicate closer to the center of the display area AA.

[0238] The horizontal axis of -100 mm indicates that the position is at the boundary between the peripheral area SA and the second display area AA2, and the horizontal axis of -95 mm indicates that the position is 5 mm away from the boundary between the peripheral area SA and the second display area AA2.

[0239] As shown in Figures 25 to 28 , the simulation results of the display module's display brightness show that when the first spacing D of the middle frame 10 is 2.2 mm, the brightness of the second display area AA2 near the peripheral area SA is higher than when the first spacing D of the middle frame 10 is 4.8 mm. In other words, when the first spacing D of the middle frame 10 is 2.2 mm, the brightness curve at the edge of the display module is flatter than when the first spacing D of the middle frame 10 is 4.8 mm. This reduces the difference between the brightness of the second display area AA2 and the brightness of the first display area AA1, improves the brightness uniformity of the display module screen, and alleviates the problem of dark frames in the display module 300.

[0240] It can be seen that when the first distance D corresponding to the middle frame 10 is smaller, more reflected light will not be blocked by the middle frame, and more light can enter the second display area AA2 to improve the brightness of the second display area AA2.

[0241] Figure 29 is a partial structural diagram of the middle frame according to some further embodiments, and Figure 30 is a partial structural diagram of the middle frame according to some further embodiments. Figures 29 and 30 illustrate the middle frame and its adjacent backplane as a single entity. Figure 31 is a light path diagram corresponding to the second distance of 6mm and 10mm for the middle frame according to some embodiments, and Figure 32 is a light path diagram corresponding to the second distance of 6mm and 10mm for the middle frame according to other embodiments.

[0242] In some embodiments, as shown in Figures 29 and 30, and in combination with Figures 4 and 5, along the second direction Y, the minimum distance between the reflective surface 111 and the support surface 12 at one end of the bottom plate 21 close to the back plate 20 is a second distance H, and the second distance H is greater than or equal to 6 mm.

[0243] The minimum distance between the end of the reflective surface 111 close to the bottom plate 21 of the back plate 20 and the supporting surface 12 along the second direction Y can be understood as the minimum distance between the end of the reflective surface 111 close to the bottom plate 21 of the back plate 20 and the point of the supporting surface 12 farthest from the bottom plate 21 along the second direction Y. In other words, the minimum distance between the end of the reflective surface 111 close to the bottom plate 21 of the back plate 20 and the diffuser 50 along the second direction Y.

[0244] When the second distance H between the side of the reflective surface 111 away from the display panel 200 and the support surface 12 along the second direction Y is equal to or close to 8 mm, the height of the middle frame 10 can be increased while maintaining the width of the middle frame 10. This can further reduce the light blocking effect of the middle frame 10, allowing more light to enter the second display area AA2 directly without being blocked by the middle frame, thereby improving the brightness of the second display area AA2. Furthermore, the middle frame 10 structured as described above can also reflect more light to the second display area AA2, thereby improving the brightness of the second display area AA2. This can minimize the difference between the brightness of the second display area AA2 and the brightness of the first display area AA1, improve the brightness uniformity of the display module screen, and alleviate the problem of dark frames appearing in the display module 300.

[0245] In some examples, along the second direction Y, a second distance H between the side of the reflective surface 111 away from the display panel 200 and the supporting surface 12 is greater than or equal to 10 mm.

[0246] When the second distance H between the side of the reflective surface 111 away from the display panel 200 and the supporting surface 12 along the second direction Y is equal to or close to 10 mm, not only can more reflected light be directly incident on the second display area AA2 without being blocked by the middle frame, but more light can also be reflected by the reflective surface 111 and incident on the second display area AA2. This improves the brightness of the second display area AA2 and alleviates the problem of dark frames in the display module 300.

[0247] For example, along the second direction Y, the second distance H between the side of the reflective surface 111 away from the display panel 200 and the supporting surface 12 is approximately 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 15 mm, or 20 mm. However, the present disclosure is not limited thereto.

[0248] It should be noted that the second distance H is approximately 9 mm. Due to certain uncontrollable errors (such as manufacturing process errors, equipment accuracy, measurement errors, etc.), when the second distance H fluctuates within the range of ±10% × 9 mm, it can also be considered that the second distance H is equal to 4 mm.

[0249] FIG31 shows a light path diagram corresponding to the middle frame 10 when the second distance H is equal to 6 mm, and a light path diagram corresponding to the middle frame 10 when the second distance H is equal to 10 mm.

[0250] As shown in Figures 4 and 6 , as well as Figure 31 , light L near the middle frame 10 is directed toward the peripheral area SA. When the second distance H corresponding to the middle frame 10 is 6 mm, the light L is blocked by the middle frame 10. The middle frame 10 reflects the light L, changing the path of the light L into a fifth light L5. As a result, the reflected fifth light L5 of the light L cannot enter the second display area AA2. That is, the changed path of the fifth light L5 prevents it from entering the second display area AA2 and instead enters the first display area AA1.

[0251] When the second distance H corresponding to the middle frame 10 is equal to 10 mm, the light L is not blocked by the middle frame 10, and the light L (the sixth light L6) can be directly irradiated toward the side close to the peripheral area SA. That is, the sixth light L6 can directly enter the second display area AA2.

[0252] It can be seen that when the second distance H corresponding to the middle frame 10 is larger, more reflected light will not be blocked by the middle frame 10, and more light can enter the second display area AA2 to improve the brightness of the second display area AA2.

[0253] As shown in Figures 4 and 6 , as well as Figure 32 , when light L traveling away from the middle frame 10 and irradiating toward the peripheral area SA, and when the second distance H corresponding to the middle frame 10 is 6 mm, the light L is reflected by the planar reflective surface 111 as a fifth light L5. After reflection, the fifth light L5 cannot enter the second display area AA2 and instead enters the first display area AA1. When the second distance H corresponding to the middle frame 10 is 10 mm, the light L is reflected by the planar reflective surface 111 as a sixth light L6. The sixth light L6 can be closer to the peripheral area SA than the fifth light L5. That is, the reflected sixth light L6 can enter the second display area AA2.

[0254] It can be seen that when the second distance H corresponding to the middle frame 10 is larger, more light reflected by the reflective surface 111 of the middle frame 10 can enter the second display area AA2, thereby improving the brightness of the second display area AA2.

[0255] Figure 33 shows simulation results of the display brightness of the display module when the second distance from the middle frame is 6mm according to some embodiments. Figure 34 shows a line graph of the display brightness of the display module when the second distance from the middle frame is 6mm according to some embodiments. Figure 35 shows simulation results of the display brightness of the display module when the second distance from the middle frame is 10mm according to some embodiments. Figure 36 shows a line graph of the display brightness of the display module when the second distance from the middle frame is 10mm according to some embodiments. The abscissas of Figures 33 to 36 represent the distance from the peripheral area SA, with larger abscissa values ​​indicating closer proximity to the center of the display area AA.

[0256] The horizontal axis of -100 mm indicates that the position is at the boundary between the peripheral area SA and the second display area AA2, and the horizontal axis of -95 mm indicates that the position is 5 mm away from the boundary between the peripheral area SA and the second display area AA2.

[0257] As shown in Figures 33 to 36 , based on the simulation results of the display module's display brightness, it can be seen that a middle frame 10 with a second distance of 10 mm can achieve higher brightness in the second display area AA2 of the display module, which is closer to the peripheral area SA, than a middle frame 10 with a second distance of 6 mm. In other words, a middle frame 10 with a second distance of 10 mm can achieve a smoother brightness curve at the edge of the display module than a middle frame 10 with a second distance of 6 mm. This can reduce the difference between the brightness of the second display area AA2 and the brightness of the first display area AA1, improve the brightness uniformity of the display module screen, and alleviate the problem of dark frames in the display module 300.

[0258] It can be seen that when the second distance H corresponding to the middle frame 10 is larger, more light reflected by the reflective surface 111 of the middle frame 10 can enter the second display area AA2, thereby improving the brightness of the second display area AA2.

[0259] The above-mentioned embodiments describe that the problem of dark frames in the display module 300 can be improved by adjusting the curvature of the reflective surface 111 of the middle frame 10, the first spacing D, the second spacing H, the first angle θ, and other features. It is understandable that the display module 300 provided by the embodiment of the present disclosure can not only utilize any one of the above-mentioned features to improve the problem of dark frames, but can also utilize at least two of the above-mentioned features in combination to further improve the problem of dark frames. For example, the display module 300 provided by the embodiment of the present disclosure can simultaneously adjust the curvature of the reflective surface 111 of the middle frame 10, the first spacing D, the second spacing H, the first angle θ, and other features to further improve the problem of dark frames in the display module 300.

[0260] 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 and a backlight module, wherein the display panel is located on the light-emitting side of the backlight module; the display panel includes a first display area and a second display area, the second display area surrounds the first display area, and the brightness ratio of the second display area to the first display area is greater than or equal to 0.85; The backlight module includes: A back plate, including a bottom plate and side plates, the bottom plate faces the display panel, the side plates surround the four peripheral edges of the bottom plate, and the side plates are located on the side of the bottom plate close to the display panel; A middle frame, arranged at one end of the side plate away from the bottom plate; the middle frame and the back plate enclose a cavity; the orthographic projection of the middle frame on the display panel at least partially overlaps with the second display area; the middle frame includes an inner wall surface located in the cavity, and the inner wall surface includes a reflecting surface facing the display panel, and the end of the reflecting surface away from the bottom plate is farther from the central area of the cavity than the end of the reflecting surface close to the bottom plate.

2. The display module according to claim 1, wherein, The middle frame further includes an outer wall surface located outside the cavity, and one side of the outer wall surface facing away from the central area of the cavity includes an outer surface, and the outer surface is perpendicular to the display panel; The middle frame further includes a bearing portion on the side close to the display panel, and one side of the bearing portion close to the display panel includes a supporting surface, and the supporting surface is used to connect the inner wall surface and the outer surface; Wherein, the bearing surface is a circular arc surface protruding towards the display panel.

3. The display module according to claim 2, wherein, The radius of the circular arc surface ranges from 1 mm to 5 mm.

4. The display module according to any one of claims 1 to 3, wherein, There is a first included angle between the reflecting surface of the middle frame and the display panel, and the first included angle is greater than or equal to 50° and less than 90°.

5. The display module according to any one of claims 1 to 4, wherein, The reflecting surface is a plane.

6. The display module according to any one of claims 1 to 4, wherein The reflecting surface is an arc surface protruding towards the central area of the cavity.

7. The display module according to claim 6, wherein, The radius of the arc surface is greater than or equal to 8 mm.

8. The display module according to any one of claims 2 to 7, wherein, In the direction from the second display area to the first display area, the minimum distance between the end of the reflecting surface away from the display panel and the outer surface is a first distance, and the first distance is less than or equal to 5 mm.

9. The display module according to any one of claims 2 to 8, wherein, In the direction from the bottom plate to the display panel, the minimum distance between the end of the reflecting surface close to the bottom plate and the supporting surface is a second distance, and the second distance is greater than or equal to 6 mm.

10. The display module according to any one of claims 1 to 9, wherein, The backlight module further includes a reflective layer, the reflective layer is located on the side of the back plate close to the display panel, the reflective layer includes a plurality of openings, and the light-emitting units are located in the openings.

11. The display module according to claim 10, wherein, The middle frame further includes a supporting portion, in the direction from the bottom plate to the display panel, the supporting portion includes a first part and a second part, the second part is located on the side of the first part away from the display panel, the first part includes the reflecting surface, and the second part includes a first extension surface connected to the reflecting surface, and the first extension surface is perpendicular to the display panel; The side of the reflective layer close to the middle frame includes a first bending portion bent toward the display panel, and the first bending portion is perpendicular to the display panel; wherein the first bending portion includes a first overlapping portion close to the side of the display panel, the first overlapping portion is located on the side of the second portion away from the peripheral area, and is fixedly connected to the first extension surface.

12. The display module according to claim 11, wherein, In a direction from the second display area to the first display area, the first overlapping portion overlaps with the first extension surface; In a direction from the bottom plate to the display panel, a length of the first overlapping portion is greater than or equal to 5 mm.

13. The display module according to claim 10, wherein, The middle frame further includes a supporting portion, and in a direction along the bottom plate pointing to the display panel, the supporting portion includes a first portion and a second portion, the second portion is located at a side of the first portion away from the display panel, the first portion includes the reflecting surface, and the second portion includes a second extending surface connected to the reflecting surface; The second portion protrudes toward the central area of ​​the cavity, and a side of the second portion facing away from the display panel abuts against a side of the reflective layer close to the display panel.

14. The display module according to claim 13, wherein, The middle frame further includes a contact portion, which is located at a side of the second portion away from the first portion, and a side of the contact portion away from the display panel contacts a side of the reflective layer close to the display panel.

15. The display module according to any one of claims 1 to 14, wherein, The side of the middle frame close to the back plate also includes a limiting groove, and the side plate is located in the limiting groove.

16. The display module according to any one of claims 1 to 15, wherein, The backlight module further includes a diffusion plate, the diffusion plate is located between the middle frame and the display panel, and the support surface of the middle frame abuts against the diffusion plate; The diffusion plate includes a glass substrate and an optical film located on a side of the glass substrate away from the middle frame.

17. A display device comprising the display module according to any one of claims 1 to 16.

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