Display module and display device

Abstract

The embodiment of the invention provides a display module and a display device, relates to the technical field of display, and aims to solve the problem of a dark frame of the display module. The display module comprises a backlight module and a display panel, and the display panel is located on the light emitting side of the backlight module. The display panel comprises 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 larger than or equal to 0.85. The backlight module comprises a back plate and a middle frame. The back plate comprises a bottom plate and side plates, and the side plates are arranged on the peripheral edges of the bottom plate in a surrounding mode. The middle frame is arranged at the end, away from the bottom plate, of the side plate. A cavity is defined by the middle frame and the back plate. The orthographic projection of the middle frame on the display panel is at least partially overlapped with the second display area. The middle frame comprises an inner wall face located in the cavity, the inner wall face comprises a reflecting face facing the display panel, and the end, away from the bottom plate, of the reflecting face is farther away from the center area of the cavity than the end, close to the bottom plate, of the reflecting face. The display panel is used for displaying images.

Description

Technical Field

[0001] The present disclosure relates to the field of display technologies, and particularly to a display module and a display device. Background Art

[0002] Mini LED (Mini Organic Light-Emitting Diode) / Micro LED (Micro Organic Light-Emitting Diode) display devices have advantages such as high brightness, clear display images, and low power consumption, and have good application prospects. Summary of the Invention

[0003] The purpose of the embodiments of the present disclosure is to provide a display module and a display device for improving the problem of the dark frame of the display module.

[0004] To achieve the above purpose, the embodiments of the present disclosure provide the following technical solutions:

[0005] On the one hand, a display module is provided. The display module includes a display panel and a backlight module, and 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 and a middle frame. The back plate includes 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. The middle frame is disposed at one end of the side plate away from the bottom plate, and 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 region of the cavity than the end of the reflecting surface close to the bottom plate.

[0006] In the above display module, more light in the backlight module can enter the second display area, so as to reduce the brightness difference between the second display area and the first display area, and achieve the improvement of the dark frame situation of the display module.

[0007] In some embodiments, the middle frame further includes an outer wall surface located outside the cavity. One side of the outer wall surface away from the central region 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 close to the display panel side. One side of the bearing portion close to the display panel includes a support surface for connecting the inner wall surface and the outer surface. Wherein, the bearing surface is a circular arc surface protruding towards the display panel side.

[0008] In some embodiments, the radius of the circular arc surface ranges from 1 mm to 5 mm.

[0009] In some embodiments, there is a first included angle between the reflection surface of the middle frame and the display panel. The first included angle is greater than or equal to 50° and less than 90°.

[0010] In some embodiments, the reflection surface is a plane.

[0011] In some embodiments, the reflection surface is an arc surface protruding towards the central region of the cavity.

[0012] In some embodiments, the radius of the arc surface is greater than or equal to 8 mm.

[0013] In some embodiments, along the direction from the second display area to the first display area, the minimum distance between the end of the reflection 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.

[0014] In some embodiments, along the direction from the bottom plate to the display panel, the minimum distance between the end of the reflection surface close to the bottom plate and the support surface is a second distance, and the second distance is greater than or equal to 6 mm.

[0015] In some embodiments, the backlight module further includes a reflective layer 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 within the openings.

[0016] In some embodiments, the middle frame further includes a supporting portion, and in the direction from the bottom plate to the display panel, the supporting portion includes a first portion and a second portion, the second portion is located on a side of the first portion away from the display panel, the first portion includes the reflecting surface, the second portion 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 reflecting 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 a side of the display panel, the first overlapping portion is located on a side of the second portion away from the peripheral area, and is fixedly connected to the first extension surface.

[0017] In some embodiments, 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.

[0018] In some embodiments, the middle frame further includes a supporting portion, and in the direction from the bottom plate to the display panel, the supporting portion includes a first portion and a second portion, the second portion is located on 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 away from the display panel abuts against a side of the reflecting layer close to the display panel.

[0019] 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.

[0020] In some embodiments, a 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.

[0021] In some embodiments, the backlight module further comprises 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 comprises a glass substrate and an optical film located on a side of the glass substrate away from the middle frame.

[0022] In another aspect, a display device is provided, comprising: a display module as described in any of the above embodiments.

[0023] The above-mentioned display device has the same structure and beneficial technical effects as the display modules provided in some of the above-mentioned embodiments, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] To more clearly illustrate the technical solutions in the present disclosure, the following will briefly introduce the drawings required for some embodiments of the present disclosure. Obviously, the drawings in the following description are only the drawings of some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings. In addition, the drawings in the following description can be regarded as schematic diagrams and do not limit the actual dimensions of the products, the actual processes of the methods, the actual timings of the signals, etc. involved in the embodiments of the present disclosure.

[0025] Figure 1 A plan view of a display device according to some embodiments;

[0026] Figure 2 A plan view of a display device according to some other embodiments;

[0027] Figure 3 A structural diagram of a display device according to some embodiments;

[0028] Figure 4 A partial structural diagram of a display module according to some embodiments;

[0029] Figure 5 A partial structural diagram of a display module according to some other embodiments;

[0030] Figure 6 A partial structural diagram of a display module according to some other embodiments;

[0031] Figure 7 An optical path diagram corresponding to when the second part of the middle frame is a plane and an arc surface according to some embodiments;

[0032] Figure 8 A simulation result diagram of the display brightness of a display module when the second extension surface of the middle frame is an arc surface according to some embodiments;

[0033] Figure 9 A line graph of the display brightness of a display module when the second extension surface of the middle frame is an arc surface according to some embodiments;

[0034] Figure 10 A simulation result diagram of the display brightness of a display module when the second extension surface of the middle frame is a plane according to some embodiments;

[0035] Figure 11 A line graph of the display brightness of a display module when the second extension surface of the middle frame is a plane according to some embodiments;

[0036] Figure 12 For Figure 4 A partial enlarged view of Q in

[0037] Figure 13 Partial structural diagram of the middle frame according to some embodiments;

[0038] Figure 14 Partial structural diagram of the middle frame according to some other embodiments;

[0039] Figure 15 Optical path diagrams corresponding to the flat and arc-shaped reflecting surfaces of the middle frame according to some embodiments;

[0040] Figure 16 Optical path diagrams corresponding to the flat and arc-shaped reflecting surfaces of the middle frame according to some other embodiments;

[0041] Figure 17 Simulation result diagram of the display brightness of the display module when the reflecting surface of the middle frame is flat according to some embodiments;

[0042] Figure 18 Line graph of the display brightness of the display module when the reflecting surface of the middle frame is flat according to some embodiments;

[0043] Figure 19 Simulation result diagram of the display brightness of the display module when the reflecting surface of the middle frame is arc-shaped according to some embodiments;

[0044] Figure 20 Line graph of the display brightness of the display module when the reflecting surface of the middle frame is arc-shaped according to some embodiments;

[0045] Figure 21 Partial structural diagram of the middle frame according to some other embodiments;

[0046] Figure 22 Partial structural diagram of the middle frame according to some other embodiments;

[0047] Figure 23 Optical path diagrams corresponding to the first spacings of 4.8 mm and 2.2 mm of the middle frame according to some embodiments;

[0048] Figure 24 Optical path diagrams corresponding to the first spacings of 4.8 mm and 2.2 mm of the middle frame according to some other embodiments;

[0049] Figure 25 Simulation result diagram of the display brightness of the display module when the first spacing of the middle frame is equal to 4.8 mm according to some embodiments;

[0050] Figure 26 Line graph of the display brightness of the display module when the first spacing of the middle frame is equal to 4.8 mm according to some embodiments;

[0051] Figure 27Simulation result diagram of the display brightness of the display module when the first spacing of the middle frame according to some embodiments is equal to 2.2 mm;

[0052] Figure 28 Line graph of the display brightness of the display module when the first spacing of the middle frame according to some embodiments is equal to 2.2 mm;

[0053] Figure 29 Partial structure diagram of the middle frame according to some other embodiments;

[0054] Figure 30 Partial structure diagram of the middle frame according to some other embodiments;

[0055] Figure 31 Optical path diagrams corresponding to the second distances of 6 mm and 10 mm of the middle frame according to some embodiments;

[0056] Figure 32 Optical path diagrams corresponding to the second distances of 6 mm and 10 mm of the middle frame according to some other embodiments;

[0057] Figure 33 Simulation result diagram of the display brightness of the display module when the second distance of the middle frame according to some embodiments is equal to 6 mm;

[0058] Figure 34 Line graph of the display brightness of the display module when the second distance of the middle frame according to some embodiments is equal to 6 mm;

[0059] Figure 35 Simulation result diagram of the display brightness of the display module when the second distance of the middle frame according to some embodiments is equal to 10 mm;

[0060] Figure 36 Line graph of the display brightness of the display module when the second distance of the middle frame according to some embodiments is equal to 10 mm. Detailed implementation manners

[0061] Next, the technical solutions in some embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments provided by the present disclosure belong to the scope protected by the present disclosure.

[0062] Unless the context otherwise requires, 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 interpreted in an open, inclusive sense, i.e., "including, but not limited to". In the description of the specification, the terms "some embodiments", "example", or "some examples", etc., are intended to indicate that a specific feature, structure, material, or characteristic related to the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representations of the above terms do not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials, or characteristics described above may be included in any one or more embodiments or examples in any appropriate manner.

[0063] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present disclosure, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0064] When describing some embodiments, the expression "connected" and its derivatives may be used. The term "connected" should be understood in a broad sense. For example, "connected" may be a fixed connection, a detachable connection, or integrated; it may be directly connected or indirectly connected through an intermediate medium. The embodiments disclosed herein are not necessarily limited to the content herein.

[0065] "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: only A, only B, only C, 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.

[0066] "A and / or B" includes the following three combinations: only A, only B, and the combination of A and B.

[0067] In addition, the use of "based on" means open and inclusive, because a process, step, calculation, or other action "based on" one or more of the stated conditions or values may, in practice, be based on additional conditions or values beyond those stated.

[0068] As used herein, "about" or "approximate" includes the stated value and an average within an acceptable deviation range of the specific value, where the acceptable deviation range is determined by a person of ordinary skill in the art in view of the measurement being discussed and the errors associated with the measurement of a particular quantity (i.e., the limitations of the measurement system).

[0069] As used herein, "parallel" and "perpendicular" include the stated situation and situations similar thereto, where the range of the similar situations is within an acceptable deviation range, and the acceptable deviation range is determined by a person of ordinary skill in the art in view of the measurement being discussed and the errors associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, where the acceptable deviation range of approximate parallelism may be, for example, within a deviation of 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, where the acceptable deviation range of approximate perpendicularity may also be, for example, within a deviation of 5°.

[0070] It should be understood that when a layer or element is referred to as being on another layer or substrate, it may be that the layer or element is directly on the other layer or substrate, or there may be an intermediate layer between the layer or element and the other layer or substrate.

[0071] Exemplary embodiments are described herein with reference to cross-sectional views and / or plan views that are idealized exemplary drawings. In the drawings, the thickness of layers and the area of regions are enlarged for clarity. Accordingly, variations in the shape relative to the drawings due to, for example, manufacturing techniques and / or tolerances are contemplated. Thus, exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but include shape deviations caused, for example, by manufacturing. For example, an etched region shown as rectangular will generally have curved features. Accordingly, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shape of the regions of the device and are not intended to limit the scope of the exemplary embodiments.

[0072] Figure 1 is a plan view of a display device according to some embodiments, Figure 2 is a plan view of a display device according to other embodiments.

[0073] As Figure 1 and Figure 2 shown, some embodiments of the present disclosure provide a display device 1000.

[0074] Exemplarily, the above display device 1000 can be any display device that displays whether it is moving (e.g., video) or stationary (e.g., still image), and whether it is text or an image. More specifically, it is expected that the display device of the embodiments can be implemented in or associated with a variety of electronic devices, such as (but not limited to) mobile phones, wireless devices, personal digital assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, video cameras, game consoles, watches, clocks, calculators, television monitors, flat panel displays, computer monitors, automotive displays (e.g., odometer displays, etc.), navigators, cockpit controllers and / or displays, displays of camera views (e.g., displays of rear view cameras in vehicles), electronic photos, electronic billboards or signs, projectors, architectural structures, packaging, and aesthetic structures (e.g., displays of images of a piece of jewelry), etc.

[0075] Exemplarily, the display device 1000 can be a liquid crystal display device (LCD), a Mini LED (Mini Light-Emitting Diode) display device, and a Micro LED (Micro Light-Emitting Diode) display device.

[0076] In some embodiments, as Figure 1 and Figure 2 shown, the display device 1000 includes at least one display module 300, and the display module 300 can implement screen display.

[0077] In some examples, as Figure 1 shown, the display device 1000 can include one display module 300. It can be understood that in other examples, as Figure 2 shown, the display device 1000 can include multiple display modules 300. That is, multiple display modules 300 are spliced to form the display device 1000. The display module 300 can directly emit at least one of red light, green light, and blue light, so that the display module 300 can achieve color display to display a preset pattern. And the display device 1000 formed after splicing multiple display modules 300 can display a larger combined pattern.

[0078] Hereinafter, the case where the display device 1000 can include multiple display modules 300 will be taken as an example for introduction.

[0079] Figure 3 It is a structural diagram of a display device according to some embodiments.

[0080] In some embodiments, such as Figure 3 As shown, 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, and the backlight module 100 is used to provide a light source for the display panel 200, so that the display panel 200 can display images.

[0081] Among them, the main structure of the display panel 200 includes an array substrate 210, a counter substrate 220, and a liquid crystal layer 230 disposed between the array substrate 210 and the counter substrate 220. In some examples, the counter substrate 220 may be a color filter substrate (abbreviated as CF).

[0082] It can be understood that light can be emitted from the backlight module 100 and irradiate the liquid crystal layer 230. By adjusting the arrangement of liquid crystal molecules in the liquid crystal layer 230, the intensity of the light transmitted through the liquid crystal layer 230 can be adjusted, thereby adjusting the intensity of the light irradiating the counter substrate 220. And the counter substrate 220 is a color filter substrate. In this way, by adjusting the intensity of the light irradiating different color resist units, the display device 1000 can realize the display function of color images.

[0083] In some examples, the display device 1000 may further include an anti-reflection film layer and a protective cover plate. The anti-reflection film layer is located between the display panel 200 and the protective cover plate. The anti-reflection film layer includes a polarizer, and the polarizer can be a circular polarizer. Here, the polarizer can reduce external light emission and prevent the display panel 200 from reflecting ambient light to produce a dazzling effect.

[0084] Figure 4 It is a partial structural diagram of a display module according to some embodiments.

[0085] In some embodiments, such as Figure 4 As shown, the display module 300 includes a backlight module 100 and a display panel 200. Among them, the display panel 200 is located on the light-emitting side of the backlight module 100.

[0086] The display panel 200 includes a display area (full English name: Active Area, abbreviated as AA area; also called the effective main function 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; or, 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 disposed 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. Further, the second display area AA2 may be an 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.

[0087] The backlight module 100 includes a middle frame 10 and a back plate 20.

[0088] The back plate 20 includes a bottom plate 21 and side plates 22. The bottom plate 21 in the back plate 20 faces the display panel 200. The side plates 22 surround the four peripheral edges of the bottom plate 21, and the side plates 22 are located on the side of the bottom plate 21 close to the display panel 200.

[0089] The middle frame 10 is disposed on the side of the side plates 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 define a cavity 30.

[0090] Exemplarily, the orthographic projection of the side of the middle frame 10 away from the central region of the cavity 30 on the bottom plate 21 substantially coincides with the orthographic projection of the boundary line between the second display area AA2 and the peripheral area SA on the bottom plate 21. Based on this, it is equivalent to setting the middle frame 10 around the edge of the display area AA1. That is, the middle frame 10 is arranged along the edge of the display panel 200, so as to support the display panel 200.

[0091] It should be noted that due to certain uncontrollable errors (such as manufacturing process errors, equipment precision, measurement errors, etc.), "substantially coincides" includes absolute coincidence and approximate coincidence. That is, the area of the orthographic projection of the side of the middle frame 10 away from the central region of the cavity 30 on the bottom plate 21 that coincides with the orthographic projection of the boundary line between the second display area AA2 and the peripheral area SA on the bottom plate 21 is greater than 95%, and it can also be considered that the orthographic projection of the side of the middle frame 10 away from the central region of the cavity 30 on the bottom plate 21 and the orthographic projection of the boundary line between the second display area AA2 and the peripheral area SA on the bottom plate 21 are "coincident" relatively.

[0092] Wherein, 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 cases.

[0093] The first case: The orthographic projection of the middle frame 10 on the display panel 200 substantially coincides with the second display area AA2.

[0094] It should be noted that due to certain uncontrollable errors (such as manufacturing process errors, equipment precision, measurement errors, etc.), "substantially coincides" includes absolute coincidence and approximate coincidence. That is, the area of the orthographic projection of the middle frame 10 on the display panel 200 that coincides with the second display area AA2 is greater than 95%, and it can also be considered that the orthographic projection of the middle frame 10 on the display panel 200 and the second display area AA2 are "coincident" relatively.

[0095] Second type: The orthographic projection of the middle frame 10 on the display panel 200 overlaps with the part of the second display area AA2 that is far from the first display area AA1. That is, the orthographic projection of the middle frame 10 on the display panel 200 overlaps with the part of the second display area AA2 that is close to the peripheral area SA.

[0096] For the definition of the boundary line between the second display area AA2 and the first display area AA1, it can be adjusted according to 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.

[0097] In some examples, the display module 300 further includes a plurality of light-emitting units 40. The plurality of light-emitting units 40 can be located in the cavity 30, and the light-emitting units 40 can be used to provide light.

[0098] In some examples, the light-emitting unit 40 can be a light-emitting diode. The light-emitting diode (such as Micro LED, MiniLED, etc.) can emit light to directly display a pattern.

[0099] In some examples, the light-emitting diode can be a micro light-emitting diode (Micro Light-Emitting Diode, abbreviated as Micro LED) or a mini light-emitting diode (Mini Light-Emitting Diode, abbreviated as Mini LED), etc.

[0100] Exemplarily, the light-emitting diode can be a light-emitting unit 40 that can emit light of the same color. For example, they can all be blue LEDs, red LEDs, green LEDs, yellow LEDs, or white LEDs.

[0101] Exemplarily, the light-emitting diode can include a variety of light-emitting diodes of different colors. For example, it can include at least two of red LED, green LED, blue LED, yellow LED, etc., and the light-emitting diodes of different colors can be independently controlled. In this way, the display device 1000 can perform color display by mixing light.

[0102] In some examples, the backlight module 100 further includes a lens T. The lens T is located on the side of the light-emitting unit 40 close to the display panel 200. Based on this, the lens T can be used to converge light, and the lens T can also be used to homogenize light.

[0103] However, through the inventor's research, it is found that the brightness of the second display area AA2 of the display module 300 is relatively low, and the brightness of the second display area AA2 is significantly lower than that of the first display area AA1. That is, there will be a phenomenon of darkening at the corners and edge positions of the display module 300.

[0104] Moreover, when multiple display modules 300 are spliced into a display device 1000, adjacent display modules 300 both have the problem of a dark frame, which will cause the width of the dark frame in the spliced display device 1000 to double, affecting the display effect of the display device 1000.

[0105] After in-depth research, the inventors of the present disclosure found that the reasons for the above-mentioned problem of uneven display brightness include poor structural design of the middle frame. Due to the ultra-narrow bezel design, the design of the edge structure of the middle frame will affect the amount of incident light, resulting in poor image quality at the edge of the splicing screen.

[0106] Specifically, some light rays emitted by 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 light rays that should enter the second display area AA2 will be reflected to the first display area AA1. Therefore, 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, resulting in a dark frame in the display module 300.

[0107] Based on this, in the display module 300 provided by the embodiments of the present disclosure, the middle frame 10 includes 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 in the cavity 30, and the inner wall surface 11 includes a reflecting surface 111 facing the display panel 200. Specifically, the reflecting surface 111 is opposite to the second display area AA2.

[0108] Among them, the end of the reflecting surface 111 far from the bottom plate 21 is farther from the central region of the cavity 30 than the end of the reflecting surface 111 close to the bottom plate 21. That is, the inner wall surface 11 extends from the junction position between the second display area AA2 and the peripheral area SA to the bottom plate 21 to form an inclined reflecting surface 111.

[0109] Adjust the structure of the middle frame 10 so that some light rays emitted by multiple light-emitting units 40 are reflected to the second display area AA2 via the reflecting surface 111 to increase the brightness of the second display area AA2. Specifically, the brightness ratio of the second display area AA2 to the first display area AA1 can be made 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 approaches 0.85, the brightness difference between the second display area AA2 and the first display area AA1 is small, and it is not easy for the human eye to observe that the brightness of the second display area AA2 is low, thereby improving the situation of the dark frame in the display module 300.

[0110] It should be noted that since the cavity 30 is formed by the cooperation of the middle frame 10 and the back plate 20. The central region of the cavity 30 can also be understood as the central region of the space formed by the bottom plate 21 and the side plate 22 in the back plate 20. Moreover, the orthographic projection of the first display area AA1 on the backlight module 100 is located within the central region of the cavity 30.

[0111] 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, which can make more light that should originally enter the second display area AA2 enter the second display area AA2, so as to further increase 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 of the display module 300 having a dark frame.

[0112] In summary, in the display module 300 provided by the embodiments 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 reflecting surface 111, so as to increase the brightness of the second display area AA2, achieve that the brightness ratio of the second display area AA2 to the first display area AA1 is greater than or equal to 0.9, reduce the brightness difference between the second display area AA2 and the first display area AA1, and improve the situation of the display module 300 having a dark frame.

[0113] In some embodiments, the material of the middle frame 10 may include any one of plastic, aluminum profile or iron plate. Taking the material of the middle frame 10 as plastic as an example for introduction. At this time, the material of the middle frame 10 can be selected as white plastic, which can make the reflecting surface 111 of the middle frame 10 have a reflectivity of more than 80%.

[0114] Based on this, it can be realized that by using the reflecting surface 111 of the middle frame 10, part of the light emitted by the plurality of light-emitting units 40 is reflected to the second display area AA2, so as to increase 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 of the display module 300 having a dark frame.

[0115] In other examples, when the material of the middle frame 10 is selected as aluminum profile or iron plate, a reflective film can be formed at the position of the reflecting surface 111 of the middle frame 10. That is, a reflective film is formed on the side of the middle frame 10 close to the cavity 30 to form the reflecting surface 111 of the middle frame 10.

[0116] In summary, the reflecting surface 111 of the middle frame 10 can be directly integrally formed with the middle frame 10, or can be formed by attaching a reflective film.

[0117] In some embodiments, the material of the backplane 20 may be a metallic material. Exemplarily, the material of the backplane 20 may be at least one of aluminum, electro-galvanized steel sheet (SECC), or hot-galvanized steel sheet (SGCC). Based on this, the backplane 20 can have good supporting force and good heat dissipation ability.

[0118] In some embodiments, the display module 300 further includes a front case U. The front case U is located in the peripheral area SA, and the front case U can be snap-connected to the backplane 20 to play a role in fixing the display panel 200 and the backlight module 100.

[0119] In some examples, the material of the front case U may include any one of electro-galvanized steel sheet (SECC), hot-galvanized steel sheet (SGCC), stainless steel (SUS304), or plastic, which can achieve a narrow bezel while increasing the stability of the display module 300. However, the embodiments of the present disclosure are not limited thereto. It can be understood that in some other examples, the material of the front case U may also be a black appearance tape.

[0120] In some embodiments, as Figure 4 shown, the backlight module 100 further includes a diffusion plate 50. The diffusion plate 50 is located between the middle frame 10 and the display panel 200. The middle frame 10 abuts against the diffusion plate 50 to use the middle frame 10 to support the diffusion plate 50, and further, the middle frame 10 can be used to support the display panel 200.

[0121] In some examples, the material of the diffusion plate 50 may include at least one of glass, polystyrene (PS), or polycarbonate (PC).

[0122] When the diffusion plate 50 uses a plastic substrate as the substrate. That is, when the material of the diffusion plate 50 is selected as polystyrene (PS), due to the relatively large expansion coefficient of the plastic substrate, an expansion space for the plastic substrate needs to be reserved in the display module 300 to meet the space requirements of the plastic substrate. However, since there is no diffusion plate 50 in the expansion space, no light will enter the expansion space. Furthermore, a dark frame will also be correspondingly formed at the position of the expansion space, which will further exacerbate the situation of the dark frame in the display module 300.

[0123] Based on this, in some other examples, the diffusion plate 50 may include a glass substrate and an optical film located on the side of the glass substrate facing away from the middle frame 10.

[0124] When the diffusion plate 50 uses a glass substrate as the substrate, there is no need to reserve an expansion space for the diffusion plate 50 in the display module 300. Based on this, it is possible to prevent the problem of widening the dark frame caused by the existence of the expansion space in the display module 300. That is, using a glass substrate as the substrate in the diffusion plate 50 can improve the situation of the appearance of the dark frame in the display module 300 to a certain extent. Among them, the glass diffusion plate 50 can be printed with single-sided or double-sided diffusion ink.

[0125] In some examples, the optical film includes a diffusion sheet and a brightness enhancement film laminated on a glass substrate. Based on this, 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. And, the diffusion sheet in the optical film can be used to increase the uniformity of the surface light source in the backlight module 100.

[0126] In some examples, the brightness enhancement film includes two types: a prism sheet (Brightness Enhanced Film, abbreviated as: BEF) and a double brightness enhancement film (Double Brightness Enhanced Film, abbreviated as: DBEF). However, the embodiments of the present disclosure are not limited thereto.

[0127] Taking the DBEF optical brightness enhancement film as an example for introduction, the DBEF optical brightness enhancement film and the glass substrate can be fully adhered to prevent the problem of bright edges caused by non-adhesion of the optical film.

[0128] In some embodiments, as Figure 4 shown, the backlight module 100 further includes a reflective layer 60, and the reflective layer 60 is located on the side of the back plate 20 close to the display panel 200.

[0129] The light emitted by the light-emitting unit 40 can be reflected by other structures in the backlight module 100 and not emitted from the backlight module 100, but emitted toward the side of the bottom plate 21. At this time, since the reflective layer 60 is provided on the side of the bottom plate 21 of the back plate 20 close to the display panel 200. At this time, the reflective layer 60 can reflect the light emitted by the light-emitting unit 40 in the light-emitting direction of the display module, thereby improving the light efficiency of the display module.

[0130] The reflective layer 60 includes a plurality of openings W, and the light-emitting unit 40 is located within the opening W. Exemplarily, one light-emitting unit 40 is located within one opening W. Among them, 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 being 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.

[0131] Based on this, it is possible to prevent the light-emitting unit 40 from contacting the reflective layer 60 and causing the situation of poor soldering, which is beneficial to improving the quality of the display module.

[0132] In some examples, the reflectivity of the reflective layer 60 is greater than or equal to 90%.

[0133] When the reflectivity of the reflective layer 60 is equal to or approaches 90%, the light emitted by the light-emitting unit 40 can be reflected in the light-emitting direction of the display module, so as to improve the utilization rate of the light emitted by the light-emitting unit 40, thereby improving the light efficiency of the display module.

[0134] In some examples, the reflectivity of the reflective layer 60 is greater than or equal to 95%.

[0135] When the reflectivity of the reflective layer 60 is equal to or approaches 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.

[0136] In some examples, one side of the reflective layer 60 close to the display panel includes a plurality of small bumps. When light irradiates the small bumps on the reflective layer 60, the light can be diffusely reflected to improve the brightness uniformity of the display module.

[0137] In some examples, the reflective layer 60 can be white, so as to achieve a relatively high reflectivity.

[0138] Exemplarily, the manufacturing material of the reflective layer 60 can be white ink, so as to achieve a high reflectivity. Among them, the white ink, for example, may include resins (such as epoxy resin, polytetrafluoroethylene resin), titanium dioxide (chemical formula TiO2), and organic solvents (such as dipropylene glycol methyl ether), etc.

[0139] Exemplarily, the material of the reflective layer 60 may further include silicone-based white glue. When the material of the reflective layer 60 includes white ink or includes silicone-based white glue, a screen printing process can be adopted to print white ink or silicone-based white glue to form the reflective layer 60.

[0140] Among them, the following takes the reflective layer 60 with a reflectivity greater than or equal to 95% and without small protrusions as an example for introduction.

[0141] The above embodiments introduce that the reflective layer 60 can be an independent reflective sheet, which is assembled on one side of the bottom plate 21 close to the display panel 200. However, the embodiments of the present disclosure are not limited thereto. It can be understood that the reflective layer 60 can also include other structures. For example, a reflective layer can be coated on the surface of the bottom plate 21 close to the display panel 200. Or, a reflective layer can be coated on the light-emitting substrate having the light-emitting unit 40.

[0142] The reflective layer 60 described in any of the above embodiments may include two setting methods. First, the reflective layer 60 can be bent to be fixedly connected to the side plate 22 of the back plate 20. Second, without bending the reflective layer 60, the structure of the support portion Z of the middle frame 10 can be adjusted so that it extends to abut against the reflective layer 60. First, the first setting method of the reflective layer 60 will be introduced.

[0143] In some embodiments, as Figure 4 shown, the first setting method of the reflective layer 60 is introduced. The reflective layer 60 includes a main body portion 62 and a first bending portion 61, and the first bending portion 61 is the portion where the reflective layer 60 is bent toward the display panel 200.

[0144] Among them, the main body portion 62 is parallel to the display panel 200, the main body portion 62 includes an opening W, the first bending portion 61 is perpendicular to the display panel 200, and on the side of the first bending portion 61 close to the display panel 200, it is disposed on the side of the middle frame 10 close to the cavity 30 and is fixedly connected to the middle frame 10.

[0145] In the above structure, the first bending portion 61 of the reflective layer 60 is bent to be perpendicular to the main body portion 62, so that the bent first bending portion 61 is parallel to the side surface of the middle frame 10 close to the central region of the cavity 30. Among them, the side of the first bending portion 61 close to the display panel 200 includes a first overlapping portion 611.

[0146] Based on this, for the bent reflective layer 60, 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 arranged to be connected to the side surface of the middle frame 10 close to the cavity 30, so as to play a role in fixing the reflective layer 60 and the middle frame 10.

[0147] In some examples, the support portion Z of the middle frame 10 further includes a second portion 10B, the second portion 10B is located on the side of the first portion 10A away from the display panel 200, and the second portion 10B includes a first extension surface 112 connected to the reflective surface 111 of the first portion 10A. Among them, 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.

[0148] Based on this, the first overlapping portion 611 of the first bending portion 61 can be disposed on the side of the second portion 10B close to the central region 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.

[0149] In some embodiments, as Figure 4As shown, 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, along the first direction X, the region where the first bending portion 61 overlaps with the first extension surface 112 is the first overlapping portion 611.

[0150] Based on this, it can be set that along the direction from the bottom plate 21 of the back plate 20 to the display panel 200 (the second direction Y), the length of the first overlapping portion 611 is greater than or equal to 5 mm. That is, it is set that the length of the overlapping region between the first bending portion 61 and the first extension surface 112 in the second direction Y is greater than or equal to 5 mm.

[0151] When along the second direction Y, the length of the first overlapping portion 611 of the first bending portion 61 is equal to or approaches 5 mm, the overlapping region between the first bending portion 61 and the first extension surface 112 is relatively large, which is beneficial to increasing the contact area between the first bending portion 61 and the first extension surface 112, thereby being beneficial to improving the stability of the fixed connection between the reflective layer 60 and the first extension surface 112.

[0152] Based on this, the contact area between the first bending portion 61 and the first extension surface 112 can be better increased, thereby being beneficial to improving the stability of the fixed connection between the first bending portion 61 and the first extension surface 112. In addition, since the contact area between the first bending portion 61 and the first extension surface 112 is relatively large, the adhesion force between the first bending portion 61 and the first extension surface 112 can also be ensured, preventing the problem that the first bending portion 61 of the reflective layer 60 falls off from the first extension surface 112 of the middle frame 10, and further ensuring the stability of the fixed connection between the first bending portion 61 and the first extension surface 112.

[0153] Exemplarily, along the second direction Y, the length of the first overlapping portion 611 is approximately any one of 5 mm, 6 mm, 8 mm, or 10 mm. However, the embodiments of the present disclosure are not limited thereto. In some 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 close to the bottom plate along the second direction Y.

[0154] It can be understood that taking the length of the first overlapping portion 611 being approximately 8 mm along the second direction Y as an example for introduction. Due to certain uncontrollable errors (such as manufacturing process errors, equipment precision, measurement errors, etc.), when the length of the first overlapping portion 611 fluctuates within the range of ±10% × 8 mm along the second direction Y, it can also be considered that the length of the first overlapping portion 611 along the second direction Y satisfies being equal to 8 mm.

[0155] Among them, the above-mentioned first overlapping portion 611 overlapping with the first extension surface 112 can include the following two situations.

[0156] The first type: along the first direction X, the first overlapping portion 611 overlaps with a portion of the first extension surface 112 close to the bottom plate 21 . That is, it is equivalent to extending the first bending portion 61 of the reflective layer 60 to overlap with the first extension surface 112 of the middle frame 10 .

[0157] The second type: the first overlapping portion 611 of the first bending portion 61 overlaps the first extension surface 112 along the first direction X. 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 .

[0158] Therefore, relative to the first method, 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, 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.

[0159] In some examples, the second portion 10B of the middle frame 10 may be extended to be in the same horizontal plane as the main body 62 of the reflective layer 60. Alternatively, the second portion 10B of the middle frame 10 may be extended to abut against the bottom plate 21. That is, the first extension surface 112 of the middle frame 10 may be extended to be in the same plane as the main body 62 of the reflective layer 60, or the first extension surface 112 of the middle frame 10 may be extended to abut against the bottom plate 21.

[0160] The above embodiments are mainly combined with Figure 4 The method of bending the partial reflective layer 60 to connect with the inner wall surface 11 of the middle frame 10 is introduced. Figure 5 Another configuration of the reflective layer 60 is described below.

[0161] Figure 5 is a partial structural diagram of a display module according to some other embodiments.

[0162] In some embodiments, in combination Figure 5 As shown, the support portion Z of the middle frame 10 further includes a second portion 10B, which is located on the side of the first portion 10A away from the display panel 200, and the second portion 10B includes a second extension surface 113 connected to the reflection 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 reflection layer 60 close to the middle frame 10.

[0163] As shown in the above structure, along the second direction Y, the second portion 10B of the middle frame 10 overlaps with the side of the reflective layer 60 close to the middle frame 10. 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.

[0164] Based on this, it can not only play a role in fixing the middle frame 10 and the reflective layer 60, but also prevent warping problems on the side of the reflective layer 60 close to the middle frame 10, improving the connection stability between the middle frame 10 and the reflective layer 60.

[0165] Figure 6 It is a partial structural diagram of a display module according to some other embodiments.

[0166] In some embodiments, as Figure 6 shown, the support portion Z of the middle frame 10 further includes a second portion 10B. The second portion 10B is located on the side of the first portion 10A away from the display panel 200, and the second portion 10B includes a second extension surface 113 connected to the reflection surface 111 of the first portion 10A. Wherein, the middle frame 10 further includes an abutting portion 101. The abutting portion 101 is located on the side of the second portion 10B away from the first portion 10A, and the side of the abutting portion 101 away from the display panel 200 abuts against the side of the reflective layer 60 close to the middle frame 10.

[0167] That is, Figure 6 the difference between the middle frame 10 shown and Figure 5 the middle frame 10 shown is that: Figure 6 the middle frame 10 shown further includes an abutting portion 101 on the side close to the reflective layer 60.

[0168] In 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. Setting the side of the abutting portion 101 away from the display panel 200 to abut against the side of the reflective layer 60 close to the middle frame 10 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.

[0169] Based on this, it can not only play a role in fixing the middle frame 10 and the reflective layer 60, but also prevent warping problems on the side of the reflective layer 60 close to the middle frame 10, improving the connection stability between the middle frame 10 and the reflective layer 60.

[0170] In some embodiments, as Figure 6 shown, one side of the second portion 10B of the middle frame 10 bulges towards the central region of the cavity 30. At this time, the second extension surface 113 gradually moves away from the central region of the cavity 30 from the side close to the reflection surface 111 to the side close to the reflective layer 60. Based on this, the occupation of the space of the cavity 30 by the middle frame 10 can be reduced, facilitating the flexibility of device arrangement in the backlight module 100. Moreover, the distance between the second extension surface 113 and the side plate 22 can be increased, facilitating the arrangement of other devices in the space formed between the second extension surface 113 and the side plate 22.

[0171] As in the above structure, in order 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 away from the central area of ​​the cavity 30, and located in the same plane as the central area of ​​the second portion 10B of the middle frame 10, and the abutting portion 101 of the middle frame 10 is arranged to extend toward the central area of ​​the cavity 30. Thus, the area of ​​the abutting portion 101 of the middle frame 10 is increased, and the contact area between the abutting portion 101 of the middle frame 10 and the reflective layer 60 is increased, which is conducive to improving the stability of the connection between the middle frame 10 and the reflective layer 60.

[0172] In some embodiments, Figure 6 As shown, the length of the abutting portion 101 of the middle frame 10 along the first direction X ranges from 1 mm to 5 mm. Based on this, it is equivalent to setting 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 to range from 1 mm to 5 mm.

[0173] 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, which 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.

[0174] 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, which can ensure that the abutting portion 101 of the middle frame 10 will not significantly affect the reflective effect of the reflective layer 60 in the backlight module 100, and 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.

[0175] For example, along the first direction X, the length of the abutting portion 101 of the middle frame 10 is about 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.

[0176] It is understandable that the length of the abutting portion 101 of the middle frame 10 along the first direction X is about 1 mm for the purpose of description. 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 floats within the range of ±10%×1 mm, it can also be considered that the length of the abutting portion 101 of the middle frame 10 along the first direction X satisfies and is equal to 1 mm.

[0177] The above combination Figure 5 and Figure 6 The middle frame 10 described above is provided with a second portion 10B protruding toward the central area of ​​the cavity 30. However, in other embodiments, Figure 5 and Figure 6 The middle frame 10 described above is improved so that the second portion 10B of the middle frame 10 is perpendicular to the display panel 200. The following will verify whether the structure of the second portion 10B of the middle frame 10 affects the dark frame in the display module 300 in combination with specific simulation data.

[0178] Figure 7 1 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.

[0179] Combination Figures 5 - 7 As shown, 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 central area of ​​the cavity 30. Since the second portion 10B of the middle frame 10 is located on the side of the first portion 10A away from the display panel 200, the light reflected by the second extension surface 113 of the second portion 10B of the middle frame 10 will be emitted toward the side away from the peripheral area SA and will be emitted into the first display area AA1, which has little effect on the brightness of the second display area AA2 of the display module 300. That is, whether the second extension surface 113 of the second portion 10B is a plane or a curved surface, the light reflected by it will be irradiated into the first display area AA1.

[0180] Therefore, it can be known that the structure of the second part 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 part 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 requirement of the backlight module 100.

[0181] Figure 8 is a simulation result diagram of display brightness of the display module when the second extension surface of the middle frame is a curved surface according to some embodiments, Figure 9 is a line graph of display brightness of the display module when the second extension surface of the middle frame is a curved surface according to some embodiments, Figure 10 is a simulation result diagram of display brightness of the display module when the second extension surface of the middle frame is a plane according to some embodiments, Figure 11 is a line graph of the display brightness of the display module when the second extension surface of the middle frame is a plane according to some embodiments. Figures 8 - 11 The abscissa represents the distance from the peripheral area SA, and a larger abscissa value represents a closer proximity to the center of the display area AA.

[0182] 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.

[0183] Combination Figures 8 - 11 As shown, according to the simulation result diagram of the display brightness of the display module, it can be known that when the second extension surface 113 of the middle frame 10 is a plane or an arc surface, the display brightness curve of the display module is not greatly affected. 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 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.

[0184] In some embodiments, Figure 4 and Figure 6 As shown, 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 can be arranged to be located in the limiting groove R.

[0185] The above structure is equivalent to bending the side plate 22 of the back plate 20 to engage with the limiting groove R. Based on this, the back plate 20 and the middle frame 10 can be fixed to improve the stability of the connection between the back plate 20 and the middle frame 10.

[0186] 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 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 .

[0187] 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.

[0188] As described above, when the side plate 22 of the back plate 20 is bent into the limiting groove R, it is equivalent to bending the side plate 22 of the back plate 20 between the first surface 114 and the second surface 132 to fix the back plate 20 and the middle frame 10 .

[0189] The above describes the structure of the display module 300 and how to improve the dark frame situation 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 in conjunction with the relevant drawings.

[0190] Figure 12 for Figure 4 A partial enlarged view of Q. Figure 5and Figure 6 The structure of the middle frame 10 close to the display panel side in the figure is also as Figure 12 shown

[0191] In some embodiments, such as Figure 4 , Figure 6 and Figure 12 shown, the first part 10A of the middle frame 10 further includes a bearing part 10A1 close to the display panel 200 side. One side of the bearing part 10A1 close to the display panel 200 includes a support surface 12, and the support surface 12 can be used to connect the reflection surface 111 in the inner wall surface 11 and the outer surface 131 in the outer wall surface 13

[0192] The support surface 12 of the bearing part 10A1 abuts against the diffusion plate 50, so as to use the support surface 12 of the middle frame 10 to support the diffusion plate 50 and play a role in supporting the display panel

[0193] In some examples, the support surface 12 of the bearing part 10A1 can be a circular arc surface protruding towards the display panel 200 side. That is, the orthographic projection of the support surface 12 of the bearing part 10A1 on the first virtual plane is a circular arc. Among them, the first virtual plane is perpendicular to the display panel 200

[0194] Based on this, the highest point position of the support surface 12 of the bearing part 10A1 of the middle frame 10 can abut against the diffusion plate 50, rather than the entire support surface 12 abutting against the diffusion plate 50. Furthermore, the shielding of the light in the second display area AA2 by the support surface 12 of the middle frame 10 can be relatively reduced, so that more light can enter the second display area AA2 through the warped position of the support surface 12, 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 of the dark frame of the display module 300

[0195] In some embodiments, such as Figure 4 , Figure 6 and Figure 12 shown, the value range of the radius of the support surface 12 (circular arc surface) is 1 mm to 5 mm. That is, the value range of the radius of the orthographic projection of the support surface 12 of the bearing part 10A1 on the first virtual plane is 1 mm to 5 mm

[0196] When the radius of the support surface (circular arc surface) 12 is equal to or approaches 1 mm, the corresponding radius of the support surface (circular arc surface) 12 is smaller. At this time, the bending degree of the support surface (circular arc surface) 12 is larger, and more light can enter the second display area AA2 through the warped position of the support surface (circular arc surface) 12, so as to improve the brightness of the second display area AA2. And the support surface (circular arc surface) 12 can also meet the requirement of supporting the diffusion plate 50

[0197] When the radius of the supporting surface (arc surface) 12 is equal to or approaches 5 mm, the radius of the supporting surface (arc surface) 12 is relatively large. At this time, the degree of bending of the supporting surface (arc surface) 12 is small, which can increase the contact area between the supporting surface (arc surface) 12 and the diffusion plate 50, and improve the supporting force of the middle frame 10 on the diffusion plate 50. In addition, the supporting surface (arc surface) 12 can be bent relative to the diffusion plate 50, and light can enter the second display area AA2 through the warped position of the supporting surface 12, so as to improve the brightness of the second display area AA2.

[0198] Exemplarily, the radius of the supporting surface (arc surface) 12 is approximately any one of 1 mm, 2 mm, 3 mm, 4 mm or 5 mm.

[0199] It should be noted that taking the radius of the supporting surface (arc surface) 12 being approximately 3 mm as an example for introduction. Due to certain uncontrollable errors (such as manufacturing process errors, equipment precision, measurement errors, etc.), when the radius of the supporting surface (arc surface) 12 fluctuates within the range of ±10% × 3 mm, it can also be considered that the radius of the supporting surface (arc surface) 12 meets the requirement of being equal to 3 mm.

[0200] In some embodiments, in combination with Figures 4 - 6 As shown, there is a first included angle θ between the extension surface of the inner wall surface 11 of the middle frame 10 and the display panel 200, and the first included angle θ is greater than or equal to 50° and less than 90°.

[0201] When the first included angle θ between the extension 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 that the included 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 is less than or equal to 40° and greater than 0°.

[0202] Since the outer surface 131 of the middle frame 10 is perpendicular to the display panel 200. With the above setting, when the first included angle θ is greater than or equal to 50°, it is equivalent to setting the inclination degree of the inner wall surface 11 of the middle frame 10 relative to the display panel 200 to be relatively high.

[0203] Based on this, part of the light can be reflected to the second display area AA2 through the reflection surface 111 of the inner wall surface 11 of the middle frame 10, so as to improve the brightness of the second display area AA2. Therefore, the brightness of the second display area AA2 and the brightness of the first display area AA1 can be balanced, and the difference between the two can be reduced, so that it is not easy for the human eye to observe that the brightness of the second display area AA2 is relatively low, thereby improving the situation of the dark frame appearing in the display module 300.

[0204] In some examples, the first included angle θ between the extension 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°.

[0205] With such a setting, it 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 inclination degree of the inner wall surface 11 of the middle frame 10 relative to the display panel is higher.

[0206] Based on this, more light can be reflected by the reflecting surface 111 of the inner wall surface 11 of the middle frame 10 to the second display area AA2, so as to improve the brightness of the second display area AA2 and improve the situation of the dark frame appearing in the display module 300.

[0207] Exemplarily, 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 embodiments of the present disclosure are not limited thereto.

[0208] It should be noted that, taking the first angle θ of approximately 70° as an example for introduction. Due to certain uncontrollable errors (such as manufacturing process errors, equipment accuracy, measurement errors, etc.), when the first angle θ fluctuates within the range of ±10%×70°, it can also be considered that the first angle θ satisfies being equal to 70°.

[0209] Figure 13 It is a partial structure diagram of the middle frame according to some other embodiments, Figure 14 It is a partial structure diagram of the middle frame according to still some other embodiments. Among them, Figure 13 and Figure 14 in it, the middle frame and the backplane adjacent to it are schematically shown as being integrated. Figure 15 It is an optical path diagram corresponding to when the reflecting surface of the middle frame according to some embodiments is a plane and an arc surface, Figure 16 It is an optical path diagram corresponding to when the reflecting surface of the middle frame according to some other embodiments is a plane and an arc surface.

[0210] In some embodiments, as Figure 13 shown, the reflecting surface 111 of the inner wall surface 11 of the middle frame 10 is a plane. At this time, from the end of the reflecting surface 111 far from the bottom plate 21 to the end of the reflecting surface 111 close to the bottom plate 21, it gradually moves away from the central area of the cavity 30. Combining Figure 14 shown, the reflecting surface 111 of the inner wall surface 11 of the middle frame 10 is an arc surface protruding toward the central area of the cavity 30. At this time, the distance between the end of the reflecting surface 111 far from the bottom plate 21 to the end of the reflecting surface 111 close to the bottom plate 21 and the central area of the cavity 30 first decreases and then increases.

[0211] Combining Figure 15As shown, when the light L near the middle frame 10 irradiates towards the side of the peripheral area SA, when the reflecting surface 111 of the inner wall surface 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 (the first light L1) can directly irradiate towards the side near the peripheral area SA. That is, the light L (the first light L1) can directly enter the second display area AA2. When the reflecting surface 111 of the inner wall surface 11 of the middle frame 10 is an arc surface protruding towards the central 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 to the second light L2. Thus, the light L cannot enter the second display area AA2. That is, the second light L2 after changing the path cannot enter the second display area AA2, but will enter the first display area AA1.

[0212] It can be seen from this that when the reflecting surface 111 of the inner wall surface 11 of the middle frame 10 is a flat surface, compared with when the reflecting surface 111 of the inner wall surface 11 of the middle frame 10 is an arc surface protruding towards the central area of the cavity 30, more light can avoid being blocked by the middle frame, and thus more light can enter the second display area AA2 to improve the brightness of the second display area AA2.

[0213] Combined with Figure 16 As shown, when the light L far from the middle frame 10 irradiates towards the side of the peripheral area SA, when the reflecting surface 111 of the inner wall surface 11 of the middle frame 10 is a flat surface, the light L is reflected by the flat reflecting surface 111 as the first light L1, and the first light L1 after reflection can enter the second display area AA2. When the reflecting surface 111 of the inner wall surface 11 of the middle frame 10 is an arc surface protruding towards the central area of the cavity 30, the light L is reflected by the flat reflecting surface 111 as the second light L2, and the second light L2 after reflection cannot enter the second display area AA2, but will enter the first display area AA1.

[0214] It can be seen from this that when the reflecting surface 111 of the inner wall surface 11 of the middle frame 10 is a flat surface, compared with when the reflecting surface 111 of the inner wall surface 11 of the middle frame 10 is an arc surface protruding towards the central area of the cavity 30, more light can enter the second display area AA2 through the reflecting surface 111 to improve the brightness of the second display area AA2.

[0215] Figure 17 It is a simulation result diagram of the display brightness of the display module when the reflecting surface of the middle frame according to some embodiments is a flat surface. Figure 18 It is a line graph of the display brightness of the display module when the reflecting surface of the middle frame according to some embodiments is a flat surface. Figure 19 It is a simulation result diagram of the display brightness of the display module when the reflecting surface of the middle frame according to some embodiments is an arc surface. Figure 20The line graph shows the display brightness of the display module when the reflecting surface of the middle frame is an arc surface according to some embodiments. Among them, Figures 17 - 20 The abscissa represents the distance from the peripheral area SA, and the larger the abscissa value, the closer it is to the center of the display area AA.

[0216] Among them, -100 mm on the abscissa indicates that this position is at the boundary line between the peripheral area SA and the second display area AA2. The abscissa of -95 mm indicates a position 5 mm away from the boundary line between the peripheral area SA and the second display area AA2.

[0217] Combined with Figures 17 - 20 , according to the simulation result graph of the display brightness of the display module, when the reflecting surface 111 of the inner wall surface 11 of the middle frame 10 is a plane, compared with when the reflecting surface 111 of the inner wall surface 11 of the middle frame 10 is an arc surface protruding toward the central area of the cavity 30, the brightness of the second display area AA2 closer to the peripheral area SA is higher. That is, when the reflecting surface 111 of the inner wall surface 11 of the middle frame 10 is a plane, compared with when the reflecting surface 111 of the inner wall surface 11 of the middle frame 10 is an arc surface protruding toward the central area 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 made lower, and the situation of the dark frame appearing in the display module 300 can be better improved.

[0218] It can be seen from this that when the reflecting surface 111 of the inner wall surface 11 of the middle frame 10 is an arc surface protruding toward the central area of the cavity 30, compared with when the reflecting surface 111 of the inner wall surface 11 of the middle frame 10 is a plane, the improvement effect on the dark frame of the display module 300 is relatively not obvious.

[0219] Based on this, in some embodiments of the present disclosure, the improvement effect on the dark frame of the display module 300 can be improved by adjusting the curvature of the arc surface. Specifically, when the reflecting surface 111 of the inner wall surface 11 of the middle frame 10 is an arc surface protruding toward the central area of the cavity 30, the corresponding radius of the arc surface can be set to be greater than or equal to 8 mm.

[0220] When the corresponding radius of the arc surface (reflecting surface 111) is equal to or approaches 8 mm, the curvature of the arc surface (reflecting surface 111) is relatively low, and more light can be reflected by the arc surface to the second display area AA2 to increase the brightness of the second display area AA2. Therefore, the brightness of the second display area AA2 and the brightness of the first display area AA1 can be balanced, and the difference between the two can be reduced, so that the human eye is not easy to observe that the brightness of the second display area AA2 is relatively low, thereby improving the situation of the dark frame appearing in the display module 300.

[0221] In some examples, the corresponding radius of the arc surface (reflecting surface 111) is greater than or equal to 10 mm.

[0222] When the corresponding radius of the arc surface (reflective surface 111) is equal to or approaches 10 mm, the arc surface (reflective surface 111) is closer to a plane. This can not only reflect more light to the second display area AA2, but also reduce the probability of the middle frame 10 blocking the light, so that more light can directly enter the second display area AA2 without being reflected by the middle frame. Thus, the brightness of the second display area AA2 can be increased, and the situation of the display module 300 having a dark frame can be improved.

[0223] Exemplarily, the corresponding radius of the arc surface (reflective surface 111) is about any one of 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 arc surface (reflective surface 111), the closer the arc surface (reflective surface 111) is to a plane.

[0224] It should be noted that taking the corresponding radius of the arc surface (reflective surface 111) being about 15 mm as an example for introduction. Due to certain uncontrollable errors (such as manufacturing process errors, equipment precision, measurement errors, etc.), when the corresponding radius of the arc surface (reflective surface 111) fluctuates within the range of ±10%×15 mm, it can also be considered that the corresponding radius of the arc surface (reflective surface 111) satisfies being equal to 15 mm.

[0225] Figure 21 It is a partial structural diagram of the middle frame according to some other embodiments. Figure 22 It is a partial structural diagram of the middle frame according to some other embodiments. Among them, Figure 21 and Figure 22 schematically show the middle frame and the backplane adjacent to it as an integrated body. Figure 23 It is an optical path diagram corresponding to the first spacings of 4.8 mm and 2.2 mm of the middle frame according to some embodiments. Figure 24 It is an optical path diagram corresponding to the first spacings of 4.8 mm and 2.2 mm of the middle frame according to some other embodiments.

[0226] It should be noted that in this embodiment, it is to verify whether the size of the first spacing D corresponding to the middle frame 10 has an impact on the dark frame situation of the display module. Therefore, in this embodiment, two types of middle frames are involved. Except for the different sizes of the first spacing D, other parameters are the same. For example, the first included angles corresponding to the two middle frames are both 65°.

[0227] In some embodiments, such as Figure 21 and Figure 22As shown, along the first direction X, the minimum distance between the end of the reflecting surface 111 away from the display panel 200 and the outer surface 131 is the first distance D, and the first distance D is less than or equal to 5 mm. Since the end of the reflecting surface 111 away from the bottom plate 21 is farther from the central region of the cavity 30 than the end of the reflecting surface 111 close to the bottom plate 21, the distance between the end of the reflecting 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 reflecting 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 overall narrowing the width of the middle frame 10 in the first direction X. Furthermore, more reflected light can be prevented from being blocked by the middle frame, and thus more light can enter the second display area AA2 to improve the brightness of the second display area AA2.

[0228] When the first distance D is equal to or approaches 5 mm, more reflected light can be prevented from being blocked by the middle frame, and thus more light can enter the second display area AA2 to improve the brightness of the second display area AA2 and improve the situation of the display module 300 having a dark frame.

[0229] In some examples, the first distance D is less than or equal to 4 mm.

[0230] When the first distance D is equal to or approaches 4 mm, the width of the middle frame 10 can be made narrower, which can further reduce the blockage of light by the middle frame 10, so that more light can enter the second display area AA2 to improve the brightness of the second display area AA2 and improve the situation of the display module 300 having a dark frame.

[0231] Exemplarily, 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.

[0232] It should be noted that the first distance D is approximately 4 mm as an example for introduction. Due to certain uncontrollable errors (such as manufacturing process errors, equipment accuracy, measurement errors, etc.), when the first distance D fluctuates within the range of ±10% × 4 mm, it can also be considered that the first distance D satisfies being equal to 4 mm.

[0233] Figure 23 The corresponding optical path diagrams of the middle frame 10 when the first distance D is equal to 4.8 mm and the corresponding optical path diagrams of the middle frame 10 when the first distance D is equal to 2.2 mm are respectively shown.

[0234] When the light L near the middle frame 10 irradiates towards the side of the peripheral area SA, when the first distance D corresponding to the middle frame 10 is equal to 4.8 mm, the light L will be reflected by the reflecting surface 111 into the third light L3. When the first distance D corresponding to the middle frame 10 is equal to 2.2 mm, the light L will be reflected by the reflecting surface 111 into the fourth light L4.

[0235] Combined with Figure 4 and Figure 6 and combined with Figure 23 as shown, neither the fourth light L4 formed after reflection nor the third light L3 formed after reflection is emitted towards the peripheral area SA. Thus, it can be seen that for the value of the first distance D corresponding to the middle frame 10, it has little influence on the brightness of the second display area AA2 of the display module.

[0236] However, when the light in the backlight module 100 is re-incident on the reflecting surface of the middle frame 10 multiple times, the light L will be reflected by the reflecting surface 111 into the third light L3. When the first distance D corresponding to the middle frame 10 is equal to 2.2 mm, the light L will be reflected by the reflecting surface 111 into the fourth light L4.

[0237] Combined with Figure 4 and Figure 6 and combined with Figure 24 as shown, when the reflected light of the light L is reflected towards the side near the peripheral area SA and the first distance 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 this light, thus changing the path of the reflected light of the light L and changing it into the third light L3. Therefore, the reflected light of the light L cannot enter the second display area AA2. That is, the third light L3 after changing the path cannot enter the second display area AA2, but will enter the first display area AA1. When the first distance D is equal to 2.2, the reflected light (the fourth light L4) of the light L is not blocked by the middle frame 10, and the fourth light L4 can directly irradiate towards the side near the peripheral area SA. That is, the fourth light L4 can directly enter the second display area AA2.

[0238] Thus, it can be seen that the smaller the size of the first distance D corresponding to the middle frame 10, the more reflected light can avoid being blocked by the middle frame, and thus more light can enter the second display area AA2 to improve the brightness of the second display area AA2.

[0239] Figure 25 FIG. is a simulation result diagram of the display brightness of the display module when the first distance of the middle frame according to some embodiments is equal to 4.8 mm, Figure 26 FIG. is a line graph of the display brightness of the display module when the first distance of the middle frame according to some embodiments is equal to 4.8 mm, Figure 27 FIG. is a simulation result diagram of the display brightness of the display module when the first distance of the middle frame according to some embodiments is equal to 2.2 mm,Figure 28 It is a line graph showing the display brightness of the display module when the first spacing of the middle frame according to some embodiments is equal to 2.2 mm. Among them, Figures 25 - 28 The abscissa represents the spacing from the peripheral area SA, and the larger the abscissa value, the closer it is to the center of the display area AA.

[0240] Among them, -100 mm on the abscissa indicates that this position is at the boundary line between the peripheral area SA and the second display area AA2. An abscissa of -95 mm indicates a position 5 mm away from the boundary line between the peripheral area SA and the second display area AA2.

[0241] Combined with Figures 25 - 28 As shown, according to the simulation result diagram of the display brightness of the display module, when the first spacing D of the middle frame 10 is 2.2 mm, compared with when the first spacing D of the middle frame 10 is 4.8 mm, the brightness of the second display area AA2 closer to the peripheral area SA is higher. That is, when the first spacing D of the middle frame 10 is 2.2 mm, compared with when the first spacing D of the middle frame 10 is 4.8 mm, the brightness curve at the edge of the display module is flatter, which can make the difference between the brightness of the second display area AA2 and the brightness of the first display area AA1 lower, improve the brightness uniformity of the display module picture, and improve the situation of the display module 300 having a dark frame.

[0242] It can be seen from this that when the size of the first spacing D corresponding to the middle frame 10 is smaller, more reflected light will not be blocked by the middle frame, and thus more light can enter the second display area AA2 to increase the brightness of the second display area AA2.

[0243] Figure 29 It is a partial structure diagram of the middle frame according to some other embodiments, Figure 30 It is a partial structure diagram of the middle frame according to some other embodiments. Among them, Figure 29 and Figure 30 In , the middle frame and the backplane adjacent to it are schematically shown as an integrated body. Figure 31 It is an optical path diagram corresponding to the second distances of 6 mm and 10 mm of the middle frame according to some embodiments, Figure 32 It is an optical path diagram corresponding to the second distances of 6 mm and 10 mm of the middle frame according to some other embodiments.

[0244] In some embodiments, as Figure 29 and Figure 30 shown, and combined with Figure 4 and Figure 5 shown, along the second direction Y, the minimum distance between the end of the reflecting surface 111 close to the bottom plate 21 of the backplane 20 and the supporting surface 12 is the second distance H, and the second distance H is greater than or equal to 6 mm.

[0245] Among them, along the second direction Y, the minimum distance between the end of the reflecting surface 111 close to the bottom plate 21 of the back plate 20 and the supporting surface 12 can be understood as the minimum distance between the end of the reflecting surface 111 close to the bottom plate 21 of the back plate 20 and the point on the supporting surface 12 farthest from the bottom plate 21 along the second direction Y. That is, along the second direction Y, the minimum distance between the end of the reflecting surface 111 close to the bottom plate 21 of the back plate 20 and the diffusion plate 50.

[0246] When, along the second direction Y, the second distance H between the side of the reflecting surface 111 away from the display panel 200 and the supporting surface 12 is equal to or approaches 8 mm, with a certain width of the middle frame 10, the height of the middle frame 10 can be made higher, which can further reduce the light blockage of the middle frame 10, so that more light can directly enter the second display area AA2 without being blocked by the middle frame, thereby improving the brightness of the second display area AA2. Moreover, with the above structure of the middle frame 10, more light can also be reflected to the second display area AA2 to improve the brightness of the second display area AA2. Thus, the difference in brightness between the second display area AA2 and the first display area AA1 can be made lower, improving the brightness uniformity of the display module screen and improving the situation of dark frames in the display module 300.

[0247] In some examples, along the second direction Y, the second distance H between the side of the reflecting surface 111 away from the display panel 200 and the supporting surface 12 is greater than or equal to 10 mm.

[0248] When, along the second direction Y, the second distance H between the side of the reflecting surface 111 away from the display panel 200 and the supporting surface 12 is equal to or approaches 10 mm, not only can more reflected light directly enter the second display area AA2 without being blocked by the middle frame, but also more light can enter the second display area AA2 after being reflected by the reflecting surface 111. Thus, the brightness of the second display area AA2 is improved, and the situation of dark frames in the display module 300 is improved.

[0249] Exemplarily, along the second direction Y, the second distance H between the side of the reflecting surface 111 away from the display panel 200 and the supporting surface 12 is approximately any one of 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 15 mm or 20 mm. However, the embodiments of the present disclosure are not limited thereto.

[0250] It should be noted that taking the second distance H of approximately 9 mm as an example for introduction. Due to certain uncontrollable errors (such as manufacturing process errors, equipment precision, measurement errors, etc.), when the second distance H fluctuates within the range of ±10% × 9 mm, the second distance H can also be considered to satisfy being equal to 4 mm.

[0251] Figure 31respectively show the optical path diagrams corresponding to the middle frame 10 when the second distance H is equal to 6 mm, and the optical path diagrams corresponding to the middle frame 10 when the second distance H is equal to 10 mm.

[0252] Combined with Figure 4 and Figure 6 and, combined with Figure 31 as shown, the light L close to the middle frame 10 irradiates towards the side of the peripheral area SA, and when the second distance H corresponding to the middle frame 10 is equal to 6 mm, the light L is blocked by the middle frame 10, and the middle frame 10 will reflect the light L, thereby changing the path of the light L and changing it into the fifth light L5. Thus, the reflected light of the light L, the fifth light L5, cannot enter the second display area AA2. That is, the fifth light L5 after changing the path cannot enter the second display area AA2, but will enter the first display area AA1.

[0253] 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 directly irradiate towards the side close to the peripheral area SA. That is, the sixth light L6 can directly enter the second display area AA2.

[0254] It can be seen from this that the larger the size of the second distance H corresponding to the middle frame 10, the more reflected light can avoid being blocked by the middle frame 10, and thus more light can enter the second display area AA2 to improve the brightness of the second display area AA2.

[0255] Combined with Figure 4 and Figure 6 and, combined with Figure 32 as shown, the light L far from the middle frame 10 irradiates towards the side of the peripheral area SA, and when the second distance H corresponding to the middle frame 10 is equal to 6 mm, the light L is reflected by the plane reflecting surface 111 into the fifth light L5, and the fifth light L5 after reflection cannot enter the second display area AA2, but will enter the first display area AA1. When the second distance H corresponding to the middle frame 10 is equal to 10 mm, the light L is reflected by the plane reflecting surface 111 into the sixth light L6. The sixth light L6 can be closer to the peripheral area SA relative to the fifth light L5. That is, the sixth light L6 after reflection can enter the second display area AA2.

[0256] It can be seen from this that the larger the size of the second distance H corresponding to the middle frame 10, the more light reflected by the reflecting surface 111 of the middle frame 10 can enter the second display area AA2 to improve the brightness of the second display area AA2.

[0257] Figure 33 is a simulation result diagram of the display brightness of the display module when the second distance of the middle frame according to some embodiments is equal to 6 mm. Figure 34Line graph showing the display brightness of the display module when the second distance of the middle frame according to some embodiments is equal to 6 mm. Figure 35 Simulation result graph showing the display brightness of the display module when the second distance of the middle frame according to some embodiments is equal to 10 mm. Figure 36 Line graph showing the display brightness of the display module when the second distance of the middle frame according to some embodiments is equal to 10 mm. Among them, Figures 33 - 36 The abscissa represents the distance from the surrounding area SA, and the larger the abscissa value, the closer it is to the center of the display area AA.

[0258] Among them, -100 mm on the abscissa indicates that this position is at the boundary line between the surrounding area SA and the second display area AA2. The abscissa of -95 mm indicates a position 5 mm away from the boundary line between the surrounding area SA and the second display area AA2.

[0259] Combined with Figures 33 - 36 As shown, according to the simulation result graph of the display brightness of the display module, it can be seen that for the middle frame 10 with a second distance equal to 10 mm, compared with the middle frame 10 with a second distance equal to 6 mm, it can make the brightness of the second display area AA2 closer to the surrounding area SA in the display module higher. That is to say, for the middle frame 10 with a second distance equal to 10 mm, compared with the middle frame 10 with a second distance equal to 6 mm, it can make the brightness curve of the display module edge smoother, make the difference between the brightness of the second display area AA2 and the brightness of the first display area AA1 lower, improve the brightness uniformity of the display module screen, and improve the situation of dark frames in the display module 300.

[0260] It can be seen from this that the larger the size of the second distance H corresponding to the middle frame 10, the more light reflected by the reflecting surface 111 of the middle frame 10 can enter the second display area AA2 to increase the brightness of the second display area AA2.

[0261] The above-described various embodiments can be introduced by adjusting features such as the bending degree of the reflecting surface 111 of the middle frame 10, the first distance D, the second distance H, and the first angle θ to solve the problem of dark frames in the display module 300. It can be understood that the display module 300 provided by the embodiments of the present disclosure can not only use any one of the above features to solve the problem of dark frames, but also use a combination of at least two of the above features to further solve the problem of dark frames. For example, the display module 300 provided by the embodiments of the present disclosure can synchronously adjust features such as the bending degree of the reflecting surface 111 of the middle frame 10, the first distance D, the second distance H, and the first angle θ to further solve the problem of dark frames in the display module 300.

[0262] As described above, it is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present disclosure, thinking of changes or substitutions, should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the said claims.

Claims

1. A display module, characterized in that, 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 is opposite to 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, disposed 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 value range of the radius of the circular arc surface is 1 mm to 5 mm.

4. The display module according to claim 1, 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 claim 1, characterized in that The reflecting surface is a plane.

6. The display module according to claim 1, 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 claim 2, wherein, Along 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 claim 2, wherein Along 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 claim 2, 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, and 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, along 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 extending surface connected to the reflecting surface, and the first extending 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 claim 1, 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 claim 1, 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, characterized in that, It comprises the display module as claimed in any one of claims 1 to 16.

Images