A display module, diffusion plate, display device, and spliced display device

Abstract

Embodiments of the present disclosure provide a display module, a diffusion plate, a display device and a spliced display device, which are applied to the technical field of display and can realize an extremely narrow frame. The display module comprises a display panel, a backlight assembly and a diffusion plate. The backlight assembly is arranged on one side of the display panel along a first direction. The first direction is the thickness direction of the display panel. The diffusion plate is arranged between the display panel and the backlight assembly. The diffusion plate comprises a first diffusion layer, a support layer, an optical film group and a sealing part. The first diffusion layer and the optical film group are arranged on both sides of the support layer along the first direction. The sealing part is arranged around the side walls of the first diffusion layer, the support layer and the optical film group. The diffusion plate is configured to diffuse and brighten the light from the backlight assembly and transmit the light to the display panel.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and in particular to a display module, a diffuser plate, a display device, and a splicing display device. Background Technology

[0002] With the continuous development of display technology, display devices, such as liquid crystal displays, are being used more and more widely, and users are demanding more and more from them. At the same time, users are also demanding more and more ultra-large screen display devices. In order to reduce production costs, ultra-large screen display devices often use small-sized display modules to splice together to form splicing display devices.

[0003] A splicing display device is a display system that combines multiple display units to form a super-large screen. It is mainly used to achieve multi-screen splicing, seamless display and unified control. Utility Model Content

[0004] The purpose of this disclosure of some embodiments is to provide a display module that can achieve an extremely narrow bezel.

[0005] To address the aforementioned technical problems, some embodiments of this disclosure provide a display module, including a display panel, a backlight assembly, and a diffuser plate. The backlight assembly is disposed on one side of the display panel along a first direction, where the first direction is the thickness direction of the display panel. The diffuser plate is disposed between the display panel and the backlight assembly. The diffuser plate includes a first diffusion layer, a support layer, an optical film assembly, and a sealing portion. The first diffusion layer and the optical film assembly are respectively disposed on both sides of the support layer along the first direction, and the sealing portion is disposed around the sidewalls of the first diffusion layer, the support layer, and the optical film assembly. The diffuser plate is configured to diffuse and brighten light from the backlight assembly and transmit light to the display panel.

[0006] The beneficial effects of some embodiments of this disclosure are as follows: The support layer enhances the support capacity of the diffuser plate. When disposed on the non-display side of the display panel, it prevents the diffuser plate from bending under gravity due to insufficient support, thereby preventing wrinkles or compression damage caused by bending and ensuring the display quality of the display panel. Furthermore, the first diffuser layer and the optical film assembly are respectively disposed on both sides of the support layer. Due to the presence of the support layer, the thickness of the first diffuser layer and the optical film assembly can be reduced, minimizing expansion deformation caused by temperature and humidity changes in the display module and preventing wrinkles or compression damage caused by large deformation. Simultaneously, the sealing portion covers the sidewalls of the first diffuser layer, the support layer, and the optical film assembly, effectively preventing moisture from entering the diffuser plate and improving its stability. The sealing part makes the first diffusion layer, the support layer and the optical film group form an integrated structure, which can improve the integrity of the diffusion plate, effectively prevent the film layer in the diffusion plate from falling off, and also avoid the need to increase the bezel size of the display module due to manufacturing tolerances when multiple films are stacked. Furthermore, there is no need to reserve a large gap in the bezel of the display module (reserving a large gap can prevent wrinkles or compression damage caused by large deformation of the diffusion plate). Therefore, the diffusion plate provided in this disclosure can be applied to display modules with extremely narrow bezels.

[0007] In some embodiments, the support layer has multiple grooves on the surface near the optical film assembly.

[0008] In some embodiments, the display panel includes a plurality of sub-pixels; the size of the recess along the second direction is smaller than the size of the sub-pixel along the second direction; and / or, the distance between adjacent recesses along the second direction is smaller than the size of the sub-pixel along the second direction; the second direction is perpendicular to the first direction.

[0009] In some embodiments, the diffuser plate further includes a second diffuser layer disposed between the support layer and the optical film assembly.

[0010] In some embodiments, the haze of the first diffusion layer and / or the second diffusion layer is greater than or equal to 95%.

[0011] In some embodiments, the display panel includes a plurality of sub-pixels; the diffuser includes a plurality of first openings, the size of the first openings along a second direction being smaller than the size of the sub-pixels along the second direction; and / or, the distance between adjacent first openings along the second direction is smaller than the size of the sub-pixels along the second direction; the second direction is perpendicular to the first direction; the first openings are located in the second diffuser layer; or, the diffuser further includes a first adhesive layer, the second diffuser layer being bonded to the optical film assembly through the first adhesive layer; the first openings are located in the first adhesive layer.

[0012] In some embodiments, if the diffuser plate further includes a first adhesive layer, the first adhesive layer contains diffuser particles.

[0013] In some embodiments, the optical film group includes a first dimming sheet, the first dimming sheet including a first prism layer and a third diffusion layer; the first diffusion layer is closer to the display panel than the optical film group, and the first prism layer of the first dimming sheet is closer to the display panel than the third diffusion layer; or, the first diffusion layer is farther from the display panel than the optical film group, and the first prism layer of the first dimming sheet is farther from the display panel than the third diffusion layer.

[0014] In some embodiments, the optical film assembly further includes a second prism layer disposed on the side of the first prism layer away from the third diffusion layer.

[0015] In some embodiments, the first diffusion layer is farther away from the display panel than the optical film group, and the support layer has a plurality of pyramidal structures on its surface near the display panel; the optical film group includes a first dimming sheet, the first dimming sheet includes a first prism layer and a third diffusion layer, and the first prism layer is farther away from the display panel than the third diffusion layer.

[0016] In some embodiments, the reflectivity of the sealing portion is greater than or equal to 85%.

[0017] In some embodiments, the backlight assembly includes a back plate and a support member. The back plate is disposed opposite to the display panel along a first direction and has a gap between it and the display panel. The support member is disposed circumferentially along the back plate and is connected to the back plate. The support member extends along the first direction, and one end of the support member is connected to the edge region of the surface of the diffuser plate away from the display panel.

[0018] Some embodiments of this disclosure also provide a diffuser plate, including a first diffuser layer, a support layer, an optical film group, and a sealing portion. The first diffuser layer and the optical film group are respectively disposed on both sides of the support layer along its own thickness direction, and the sealing portion is disposed around the sidewalls of the first diffuser layer, the support layer, and the optical film group. The diffuser plate is configured to diffuse and brighten the light incident on the diffuser plate, and transmit the light out of the diffuser plate.

[0019] Some embodiments of this disclosure also provide a display device, including a display module as described in some of the above embodiments, or a diffusion plate as described in some of the above embodiments.

[0020] Some embodiments of this disclosure also provide a splicing display device, including multiple display modules as described in the above embodiments, wherein the multiple display modules are spliced ​​together. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0022] Figure 1 A cross-sectional view of a display module provided in some embodiments of this disclosure;

[0023] Figure 2 A cross-sectional view of a display panel provided in some embodiments of this disclosure;

[0024] Figure 3 A cross-sectional view of another display panel provided in some embodiments of this disclosure;

[0025] Figure 4 A top view of an array substrate provided in some embodiments of this disclosure;

[0026] Figure 5 A cross-sectional view of a diffuser plate provided in some embodiments of this disclosure;

[0027] Figure 6 A cross-sectional view of another diffuser plate provided in some embodiments of this disclosure;

[0028] Figure 7 A cross-sectional view of yet another diffuser plate provided in some embodiments of this disclosure;

[0029] Figure 8 A cross-sectional view of yet another diffuser plate provided in some embodiments of this disclosure;

[0030] Figure 9 A cross-sectional view of yet another diffuser plate provided in some embodiments of this disclosure;

[0031] Figure 10 A cross-sectional view of an optical diaphragm assembly provided in some embodiments of this disclosure;

[0032] Figure 11 A cross-sectional view of yet another diffuser plate provided in some embodiments of this disclosure;

[0033] Figure 12 A cross-sectional view of yet another diffuser plate provided in some embodiments of this disclosure;

[0034] Figure 13 A cross-sectional view of a support member provided in some embodiments of this disclosure;

[0035] Figure 14 This is a cross-sectional view of another display module provided in some embodiments of this disclosure. Detailed Implementation

[0036] The technical solutions in some embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this disclosure are within the scope of protection of this disclosure.

[0037] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific feature, structure, material, or characteristic may be included in any suitable manner in any one or more embodiments or examples.

[0038] 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 number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0039] In describing some embodiments, the term "connection" and its derivative expressions may be used. The term "connection" should be interpreted broadly; for example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. The embodiments disclosed herein are not necessarily limited to the content of this document.

[0040] "At least one of A, B and C" has the same meaning as "at least one of A, B or C", both including the following combinations of A, B and C: only A, only B, only C, combinations of A and B, combinations of A and C, combinations of B and C, and combinations of A, B and C.

[0041] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0042] It should be understood that when a layer or element is referred to as being on another layer or substrate, it can mean that the layer or element is directly on the other layer or substrate, or that there is an intermediate layer between the layer or element and the other layer or substrate.

[0043] This document describes exemplary embodiments with reference to cross-sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and the area of ​​regions are enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Thus, exemplary embodiments should not be construed as being limited to the shapes of the regions shown herein, but rather include shape deviations due to, for example, manufacturing processes. For example, etched areas shown as rectangular would typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the areas of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0044] Display devices can be used to display images, and can be any device that displays either moving (e.g., video) or stationary (e.g., still images), and whether it is text or images. Display devices include, but are not limited to, televisions, mobile phones, wearable devices, personal digital assistants (PDAs), augmented reality (AR) devices, virtual reality (VR) devices, handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, camcorders, game consoles, clocks, calculators, television monitors, flat panel displays, computer monitors, in-vehicle displays (e.g., odometer displays), navigators, cockpit controllers and / or displays, displays of camera views (e.g., displays of rearview cameras in vehicles), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging and aesthetic structures (e.g., displays of images of a piece of jewelry), etc.

[0045] The display device may include one or more display modules; when the display device includes multiple display modules, it can form a splicing display device for large-screen display or ultra-large-screen display.

[0046] For example, such as Figure 1As shown, the display module 100 may include a display panel 10. There are many types of display panels 10. For example, the display panel 10 may be an organic light-emitting diode (OLED) display panel, a micro organic light-emitting diode (Micro OLED) display panel, a quantum dot light-emitting diode (QLED) display panel, a mini light-emitting diode (Mini LED) display panel, a micro light-emitting diode (Micro LED) display panel, or a liquid crystal display (LCD) display panel, etc. This disclosure does not limit the scope of the application. Some embodiments of this application are described using a liquid crystal display panel as an example.

[0047] For example, such as Figure 2 , Figure 3 As shown, the display panel 10 (liquid crystal display panel) may include an array substrate 11, a liquid crystal layer 12 and a color filter substrate 13 stacked sequentially from bottom to top.

[0048] like Figure 4 As shown, the array substrate 11 may include a display area AA and a peripheral area BB located on at least one side of the display area AA. For example, the peripheral area BB is located on all four sides of the display area AA and is arranged around the display area AA. The display area AA of the array substrate 11 may be provided with multiple signal lines. The multiple signal lines may include, for example, multiple data signal lines Data, multiple gate signal lines GI, etc. The data signal lines Data may extend in the vertical direction X, and the gate signal lines GI may extend in the horizontal direction Y.

[0049] like Figure 4 As shown, multiple data signal lines Data and multiple gate signal lines GI are intersected to define multiple sub-pixel regions C. Each sub-pixel region C includes a sub-pixel P, each sub-pixel P includes a pixel driving circuit D, and each pixel driving circuit D includes at least one transistor. The peripheral area BB of the array substrate 11 can be provided with multiple signal lines, such as GOA signal lines, to ensure the normal display of the display panel 10.

[0050] For example, the pixel driving circuit D can be configured to provide an electrical signal to the pixel electrode coupled to the pixel driving circuit D in response to the received gate signal and data signal, so as to form an electric field in the sub-pixel P where the pixel electrode is located, drive the liquid crystal molecules of the liquid crystal layer 12 to deflect, and make the sub-pixel P emit light, thereby enabling the display panel 10 to display an image.

[0051] The color filter substrate 13 can also be called an opposing substrate or a packaged substrate. The color filter substrate 13 may include multiple light filters and multiple black matrices. The light filters are used to filter the light incident on the color filter substrate 13 so that each sub-pixel P emits light of a specific color (such as red, green, or blue). Different sub-pixels P emit light of different colors, thereby enabling the display panel 10 to achieve color display. The black matrices are used to cover the pixel driving circuit D and signal lines on the array substrate 11, improving the contrast of the display panel 10.

[0052] The structure of the display panel 10 is not limited to this. The display panel 10 may also include other structures, as long as the same technical concept is adopted. For example, the display panel 10 may also include a first alignment film disposed on the side of the array substrate 11 near the liquid crystal layer 12, and a second alignment film disposed on the side of the color filter substrate 13 near the liquid crystal layer 12, etc.

[0053] like Figure 2 As shown, the display panel 10 may also include a driving circuit 14. The driving circuit 14 may be, for example, a GOA (Gate Driver on Array) circuit. In order to achieve the narrow bezel design of the display panel 10, the driving circuit 14 may not be placed in the peripheral area BB of the array substrate 11, but may be connected to the array substrate 11 through COF (Chip On Film), so that the driving circuit 14 can be placed on the non-display side of the display panel 10.

[0054] like Figure 2 As shown, polarizers 15 can also be provided on the display surface and non-display surface (upper and lower surfaces) of the display panel 10 to improve the display effect of the display panel 10 and reduce reflection.

[0055] For example, such as Figure 1 As shown, the display module 100 may also include a backlight assembly 20, which is disposed on one side of the display panel 10 along the first direction (the thickness direction of the display panel 10 itself), for example, the backlight assembly 20 is disposed on the non-display side of the display panel 10.

[0056] like Figure 1As shown, the backlight assembly 20 may include a back plate 21, a support member 22, a reflector 24, and a light source 23. The back plate 21 may, for example, provide a base support for the support member 22, the reflector 24, and the light source 23. A portion of the back plate 21 is disposed opposite to the display panel 10 along a first direction (the thickness direction of the display panel 10) and has a gap between it and the display panel 10. Specifically, the back plate 21 may include a first portion 21-1 and a second portion 21-2. The first portion 21-1 is disposed opposite to the display panel 10, and the second portion 21-2 is disposed along the first direction (the thickness direction of the display panel 10). In other words, the first portion 21-1 and the second portion 21-2 may be perpendicular to each other.

[0057] like Figure 1 As shown, the reflector 24 and the light source 23 can be disposed on the surface of the first portion 21-1 of the back plate 21 near the display panel 10. The light source 23 can be used to provide light to the display panel 10, ensuring the normal display of the display panel 10. The reflector 24 is disposed on the portion of the first portion 21-1 of the back plate 21 where the light source 23 is not disposed, and can be used to reflect the light emitted onto the first portion 21-1 of the back plate 21 to the display panel 10, thereby improving the display brightness of the display panel 10 and increasing the light extraction efficiency.

[0058] like Figure 1 As shown, the support member 22 extends along a first direction (the thickness direction of the display panel 10), is arranged circumferentially along the back plate 21, and is connected to the back plate 21. For example, one end of the support member 22 can be attached to the first part 21-1 of the back plate 21, and the other end of the support member 22 can be attached to the diffuser plate 30. The support member 22 can be used to support the diffuser plate 30 and the display panel 10, ensuring relative stability between the display panel 10 and the light source 23. The second part 21-2 of the back plate 21 can be used to provide support for the support member 22, ensuring the stability of the support member 22.

[0059] The material of the support member 22 can be, for example, aluminum.

[0060] For example, such as Figure 1 As shown, the display module 100 may also include conductive foam 40, which is connected to the driving circuit 14 of the display panel 10 and is also attached to the second part 21-2 of the back plate 21. It can be used to fix the driving circuit 14 and release the static electricity generated in the driving circuit 14.

[0061] For example, such as Figure 1 As shown, the display module 100 may also include a circuit board cover 50, which is disposed on the side of the drive circuit 14 of the display panel 10 away from the backlight assembly 20, and can be used to protect the drive circuit 14.

[0062] For example, such as Figure 1 As shown, the display module 100 may also include reflective tape 70, which is attached to the side where the display panel 10 and the diffuser plate 30 are bonded, and to the side where the diffuser plate 30 and the support member 22 of the backlight assembly 20 are bonded, and can be used to reflect light back to the backlight assembly 20 to improve the brightness of the bonding area.

[0063] For example, such as Figure 1 As shown, the display module 100 may also include an appearance tape 60 located on the outermost side of the display module 100, which can be used to protect the display module 100 and also serve as the appearance of the display module 100.

[0064] For example, such as Figure 1 As shown, the display module 100 may further include a diffuser plate 30 disposed between the display panel 10 and the backlight assembly 20. This diffuser plate can be used to adjust the light, diffuse and brighten the light from the backlight assembly 20, and transmit the light to the display panel 10, ensuring normal display of the display panel 10 and improving the display contrast of the display panel 10. The diffuser plate 30 can be attached to the display panel 10.

[0065] With the continuous development of display technology, users have an increasing demand for narrow bezels in display devices. A display device may include a display module 100. To meet the requirement for narrow bezels in the display device, the size of the bezel of the display module 100 needs to be reduced.

[0066] Meanwhile, a large-screen splicing display device can be composed of multiple display modules 100 spliced ​​together. The seam between two adjacent display modules 100 is a key parameter of the splicing display device. The size of the bezel of the display module 100 directly affects the seam of the splicing display device, and the size of the seam directly affects the display effect. Therefore, in order to reduce the seam and improve the display effect, it is also necessary to reduce the size of the bezel of the display module 100.

[0067] Currently, in the display module 100, the structure of the diffuser plate 30 also affects the size of the bezel of the display module 100. Therefore, it is crucial to provide a diffuser plate 30 that can be applied to a display module 100 with an extremely narrow bezel.

[0068] In some embodiments, such as Figure 5 As shown, the diffuser plate 30 may include a first diffuser layer 31, a support layer 32 and an optical film group 33 stacked together. The first diffuser layer 31 and the optical film group 33 may be respectively disposed on both sides of the support layer 32 along the first direction. The diffuser plate 30 may be disposed parallel to the display panel 10. Therefore, the first direction may also be regarded as the thickness direction of the support layer 32.

[0069] For example, the support layer 32 includes a first surface and a second surface opposite to each other, the first diffusion layer 31 may be located on the side where the first surface of the support layer 32 is located, and the optical film group 33 may be located on the side where the second surface of the support layer 32 is located; or, for example, the first diffusion layer 31 may be located on the side where the second surface of the support layer 32 is located, and the optical film group 33 may be located on the side where the first surface of the support layer 32 is located; this disclosure is not limited herein.

[0070] For example, the support layer 32 can be used to support other films in the diffuser plate 30 (e.g., the first diffuser layer 31, the optical film group 33, etc.). The material of the support layer 32 may include glass, for example, with an iron content of less than or equal to 150 ppm; the thickness of the support layer 32 (glass) may range from 1 mm to 2 mm; and the light transmittance of the support layer 32 (glass) may be greater than 90%.

[0071] For example, the iron content of the support layer 32 (glass) can be 110ppm, 120ppm, 130ppm, 140ppm, 150ppm, etc.; the thickness of the support layer 32 (glass) can be 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, etc.; and the light transmittance of the support layer 32 (glass) can be 91%, 92%, 93%, 94%, 95%, etc.

[0072] For example, the first diffusion layer 31 can be used to diffuse light incident upon it, thereby improving the display uniformity of the display panel 10. The material of the first diffusion layer 31 may include, for example, diffusion ink, and the haze of the first diffusion layer 31 (diffusion ink) may be greater than or equal to 95%; for example, the haze of the first diffusion layer 31 (diffusion ink) may be 96%, 97%, 98%, 99%, etc.

[0073] For example, the diffusion ink may be an optical resin, titanium dioxide, silica mixture, etc. with a refractive index in the range of 1.48 to 1.55, and this disclosure is not limited thereto.

[0074] The optical film group 33 can be, for example, a composite film of a diffusion film and a prism film, which can diffuse and brighten the light incident on it.

[0075] In some embodiments, such as Figure 5As shown, the diffuser plate 30 may further include a sealing portion 34, which may be disposed around the sidewalls of the first diffuser layer 31, the support layer 32, and the optical film group 33; the sealing portion 34 covers the sidewalls of the film layers stacked in the diffuser plate 30, for example, the sealing portion 34 covers the sidewalls of the first diffuser layer 31, the support layer 32, and the optical film group 33. That is, the sealing portion 34 is disposed on the left and right sides of the first diffuser layer 31, the support layer 32, and the optical film group 33.

[0076] The thickness h1 of the sealing part 34 can be less than or equal to 0.25 mm. The thickness h1 of the sealing part 34 refers to the distance between the sealing part 34 and the sidewall of the film layer stacked in the diffuser plate 30.

[0077] The width L1 of the sealing part 34 can ensure that it covers the sidewall of the film layer stacked in the diffuser plate 30 and does not exceed the upper and lower surfaces of the diffuser plate 30, so as to prevent moisture from the external environment from entering the diffuser plate 30.

[0078] The support layer 32 can enhance the support capacity of the diffuser plate 30. When it is located on the non-display side of the display panel 10, it can prevent the diffuser plate 30 from bending under gravity due to insufficient support capacity. This can prevent the diffuser plate 30 from forming wrinkles or being damaged by compression due to bending, thus ensuring the display quality of the display panel 10.

[0079] Furthermore, the first diffusion layer 31 and the optical film group 33 are respectively disposed on both sides of the support layer 32. Due to the presence of the support layer 32, the thickness of the first diffusion layer 31 and the optical film group 33 can be set to be smaller, which can reduce the expansion deformation of the first diffusion layer 31 and the optical film group 33 caused by temperature and humidity changes in the display module 100, and can avoid wrinkles or compression damage to the diffusion plate 30 due to large deformation.

[0080] Meanwhile, the sealing part 34 covers the sidewalls of the first diffusion layer 31, the support layer 32 and the optical film group 33, which can effectively prevent moisture in the air from entering the diffusion plate 30 and improve the stability of the diffusion plate 30.

[0081] The sealing part 34 makes the first diffusion layer 31, the support layer 32 and the optical film group 33 form an integral structure, which can improve the integrity of the diffusion plate 30, effectively prevent the film layer in the diffusion plate 30 from falling off, and also avoid the need to increase the bezel size of the display module 100 due to manufacturing tolerances when multiple films are stacked. Furthermore, there is no need to reserve a large gap in the bezel of the display module 100 (reserving a large gap can prevent wrinkles or squeezing damage caused by large deformation of the diffusion plate 30). Therefore, the diffusion plate 30 provided in this disclosure can be applied to the display module 100 with an extremely narrow bezel.

[0082] This solution is simple in process and low in cost; and it can be made to attach only the sealing part 34 to the display panel 10, which is beneficial for setting an ultra-narrow bezel.

[0083] like Figure 1 As shown, the diffuser plate 30 and the display panel 10 can be bonded together using UV adhesive 80. The UV adhesive 80 can be a semi-solid UV-cured adhesive with an adhesion strength greater than 26 kgf / cm, a light transmittance greater than 90%, and a thickness of 0.2 mm.

[0084] In some embodiments, the reflectivity of the sealing portion 34 may be greater than or equal to 85%. For example, the reflectivity of the sealing portion 34 may be 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, etc.

[0085] The material of the sealing part 34 can be, for example, a gray or white opaque adhesive with a light reflectance greater than or equal to 85%.

[0086] With the above configuration, the sealing part 34 can reflect the light emitted to the side wall of the diffuser plate 30 back into the display module 100, preventing light from being emitted from the side wall of the diffuser plate 30 to the outside of the display module 100, thus preventing light leakage. At the same time, it can improve the utilization rate of light and increase the display brightness of the display module 100.

[0087] For example, such as Figure 6 As shown, the optical film assembly 33 can be bonded to the support layer 32, for example, through the second adhesive layer 35.

[0088] In some embodiments, refer to Figure 1 , Figure 6 The first diffusion layer 31 can be closer to the display panel 10 than the optical film group 33; that is, the light emitted by the light source 23 in the backlight assembly 20 first passes through the optical film group 33, then through the first diffusion layer 31, and is then projected onto the display panel 10. The optical film group 33 does not contact the display panel 10, so there is no problem of the optical film group 33 being scratched.

[0089] In some other embodiments, the first diffusion layer 31 may be located away from the display panel 10 compared to the optical film group 33, which is not limited herein.

[0090] like Figure 6 As shown, the surface of the support layer 32 near the optical film assembly 33 may be provided with multiple grooves 1. For example, the cross section of the groove 1 in the thickness direction of the diffuser plate 30 may be rectangular, semi-circular, or other shapes, which are not limited in this disclosure.

[0091] The surface of the support layer 32 near the optical film assembly 33 includes multiple grooves 1, which can add an air layer (the air is located in the groove 1) between the optical film assembly 33 and the support layer 32, which can improve the light refraction ability of the optical film assembly 33, help improve the viewing angle, and improve the light utilization rate.

[0092] For example, the size of the groove 1 along the second direction can be smaller than the size of the sub-pixel P along the second direction; the second direction is perpendicular to the first direction, that is, the second direction is perpendicular to the thickness direction of the display panel 10.

[0093] The second direction is perpendicular to the thickness direction of the display panel 10, that is, the second direction is any direction parallel to the display surface of the display panel 10, or any direction parallel to the surface of the support layer 32.

[0094] The dimension of the groove 1 along the second direction refers to the dimension of the opening of the groove 1 in a direction parallel to the surface of the support layer 32 near the optical film assembly 33.

[0095] It is understandable that when the opening of the groove 1 is irregular in shape, the dimensions of the groove 1 along different second directions may be different.

[0096] The size of the groove 1 along the second direction can be smaller than the size of the sub-pixel P along the second direction. That is, the size of the opening of the groove 1 of the support layer 32 near the surface of the optical film group 33 in a certain direction is smaller than the size of the sub-pixel P in that direction.

[0097] The distance between adjacent grooves 1 along the second direction can be less than the size of the sub-pixel P along the second direction; that is, the distance between adjacent grooves 1 of the support layer 32 near the surface of the optical film group 33 in a certain direction is less than the size of the sub-pixel P in that direction.

[0098] The above settings can effectively prevent the size of the groove 1 from being too large and affecting the display effect of the display panel 10.

[0099] When preparing the diffuser plate 30, the depth of the groove 1 can be greater than the thickness of the second adhesive layer 35 to prevent the second adhesive layer 35 from filling the groove 1 of the support layer 32 after it is bonded to the support layer 32.

[0100] In some embodiments, such as Figure 6 In the diffusion plate 30 shown, the thickness of the first diffusion layer 31 can range from 20 μm to 25 μm. For example, it can be 20 μm, 21 μm, 22 μm, 23 μm, 24 μm, or 25 μm.

[0101] In some embodiments, such as Figure 7As shown, the diffuser plate 30 may also include a second diffuser layer 36 disposed between the support layer 32 and the optical film group 33.

[0102] like Figure 7 As shown, the second diffusion layer 36 can be in direct contact with the support layer 32, and the second diffusion layer 36 can be bonded to the optical film assembly 33 through the first adhesive layer 37.

[0103] In some embodiments, refer to Figure 1 , Figure 7 The first diffusion layer 31 is closer to the display panel 10 than the second diffusion layer 36. This allows the light emitted by the light source 23 in the backlight assembly 20 to first pass through the optical film group 33, which can diffuse and brighten the light. The diffused and brightened light then passes through the second diffusion layer 36 and the first diffusion layer 31 twice before entering the display panel 10. This helps to make the light entering the display panel 10 more uniform, further improving the uniformity of the display on the display panel 10 and further improving the display image quality of the display panel 10.

[0104] For example, the second diffusion layer 36 can be used to diffuse light incident upon it, thereby improving the uniformity of the display panel 10. The material of the second diffusion layer 36 may include, for example, diffusion ink, and the haze of the second diffusion layer 36 (diffusion ink) may be greater than or equal to 95%; for example, the haze of the second diffusion layer 36 (diffusion ink) may be 96%, 97%, 98%, 99%, etc.

[0105] The diffusion ink can be, for example, an optical resin, titanium dioxide, a mixture of silica, etc. with a refractive index in the range of 1.48 to 1.55, and this disclosure does not limit it.

[0106] For example, such as Figure 7 In the diffusion plate 30 shown, the thickness of the first diffusion layer 31 can range from 10um to 20um. For example, the thickness of the first diffusion layer 31 can be 10um, 11um, 12um, 13um, 14um, 15um, 16um, 17um, 18um, 19um, 20um, etc.

[0107] The thickness of the second diffusion layer 36 can range from 10um to 20um. For example, the thickness of the second diffusion layer 36 can be 10um, 11um, 12um, 13um, 14um, 15um, 16um, 17um, 18um, 19um, 20um, etc.

[0108] In some embodiments, such as Figure 8 , Figure 9 As shown, and refer to Figure 1The diffuser plate 30 includes a plurality of first openings 2, the size of the first openings 2 along the second direction is smaller than the size of the sub-pixel P along the second direction; and / or, the distance between adjacent first openings 2 along the second direction is smaller than the size of the sub-pixel P along the second direction; the second direction is perpendicular to the first direction, that is, the second direction is perpendicular to the thickness direction of the display panel 10.

[0109] The first opening 2 can be located in the second diffusion layer 36.

[0110] In some embodiments, such as Figure 8 As shown, the second diffusion layer 36 may include a plurality of first openings 2, which may penetrate the second diffusion layer 36. This disclosure does not limit the shape of the first openings 2 on the surface of the second diffusion layer 36.

[0111] In some embodiments, the first opening 2 is rectangular in shape on the surface of the second diffusion layer 36, and the second diffusion layer 36 can be mesh-like.

[0112] The second diffusion layer 36 includes a plurality of first openings 2, which penetrate the second diffusion layer 36. This allows an air layer (the air is located inside the first opening 2) to be added between the optical film assembly 33 and the support layer 32, thereby improving the light refraction capability of the optical film assembly 33 and increasing the light utilization rate.

[0113] For example, the size of the first opening 2 along the second direction can be smaller than the size of the sub-pixel P along the second direction.

[0114] The dimension of the first opening 2 along the second direction refers to the dimension of the first opening 2 on the surface of the second diffusion layer 36 in a direction parallel to that surface.

[0115] It is understandable that when the first opening 2 is irregular in shape, the dimensions of the first opening 2 along different second directions may be different.

[0116] The size of the first opening 2 along the second direction is smaller than the size of the sub-pixel P along the second direction. That is, the size of the first opening 2 on the surface of the second diffusion layer 36 in a certain direction is smaller than the size of the sub-pixel P in that direction.

[0117] The distance between adjacent first openings 2 along the second direction can be less than the size of sub-pixel P along the second direction. That is, the distance between adjacent first openings 2 on the surface of the second diffusion layer 36 in a certain direction is less than the size of sub-pixel P in that direction.

[0118] The above settings can effectively prevent the width of the first opening 2 from being too large and affecting the display effect of the display panel.

[0119] When preparing the diffusion plate 30, the thickness of the second diffusion layer 36 can be greater than the thickness of the first adhesive layer 37, so as to prevent the first adhesive layer 37 from filling the first opening 2 of the second diffusion layer 36 after the first adhesive layer 37 and the second diffusion layer 36 are bonded together.

[0120] The first opening 2 can also be located in the first adhesive layer 37.

[0121] In some embodiments, such as Figure 9 As shown, the first adhesive layer 37 may include a plurality of first openings 2, which may penetrate the first adhesive layer 37. This disclosure does not limit the shape of the first openings 2 on the surface of the first adhesive layer 37.

[0122] In some embodiments, the first opening 2 is rectangular in shape on the surface of the first adhesive layer 37, and the first adhesive layer 37 can be mesh-like.

[0123] The first adhesive layer 37 includes a plurality of first openings 2, which penetrate the first adhesive layer 37. This allows an air layer (the air is located inside the first opening 2) to be added between the optical film assembly 33 and the support layer 32, thereby improving the light refraction capability of the optical film assembly 33 and increasing the light utilization rate.

[0124] For example, the size of the first opening 2 along the second direction can be smaller than the size of the sub-pixel P along the second direction.

[0125] The dimension of the first opening 2 along the second direction refers to the dimension of the first opening 2 on the surface of the first adhesive layer 37 in a certain direction parallel to the surface of the first adhesive layer 37.

[0126] It is understandable that when the first opening 2 is irregular in shape, the dimensions of the first opening 2 along different second directions may be different.

[0127] The size of the first opening 2 along the second direction can be smaller than the size of the sub-pixel P along the second direction. That is, the size of the first opening 2 on the surface of the first adhesive layer 37 in a certain direction is smaller than the size of the sub-pixel P in that direction.

[0128] The distance between adjacent first openings 2 along the second direction can be less than the size of sub-pixel P along the second direction. That is, the distance between adjacent first openings 2 on the surface of the first adhesive layer 37 in a certain direction is less than the size of sub-pixel P in that direction.

[0129] The above settings can effectively prevent the width of the first opening 2 from being too large and affecting the display effect.

[0130] In some embodiments, the first adhesive layer 37 is provided with diffusing particles, that is, the first adhesive layer 37 is doped with diffusing particles, and the haze of the first adhesive layer 37 can be greater than or equal to 85%, for example, it can be 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, etc.

[0131] The first adhesive layer 37 contains diffusing particles, which allows the first adhesive layer 37 to diffuse light, further improving the uniformity of the display panel 10 and enhancing the display quality of the display panel 10.

[0132] The material of the first adhesive layer 37 can be solid OCA adhesive with a viscosity greater than or equal to 30N / 25mm.

[0133] In some embodiments, such as Figure 10 As shown, the optical film assembly 33 may include a first dimming plate 33-1, which may include a first prism layer 33-12 and a third diffusion layer 33-11. The first prism layer 33-12 can be used to brighten the light. The third diffusion layer 33-11 can be used to diffuse the light.

[0134] For example, the first prism layer 33-12 and the third diffusion layer 33-11 of the first dimming sheet 33-1 can share the same substrate, which can reduce the thickness of the first dimming sheet 33-1 and improve the integrity of the first dimming sheet 33-1.

[0135] For example, a prism structure can be fabricated on one side of a PET substrate to form a first prism layer 33-12; and diffusion particles can be back-coated on the other side to form a third diffusion layer 33-11.

[0136] This configuration can significantly reduce the thickness of the optical film assembly 33, thereby reducing the thickness of the diffuser plate 30, making it more suitable for use in the display module 100 with an ultra-narrow bezel.

[0137] In some embodiments, refer to Figure 1 , Figure 6 , Figure 10 When the first diffusion layer 31 is closer to the display panel 10 than the optical film group 33, the first prism layer 33-12 of the first dimming sheet 33-1 is closer to the display panel 10 than the third diffusion layer 33-11.

[0138] Under this setting, when the light emitted by the light source 23 in the backlight assembly 20 passes through the optical film group 33, the optical film group 33 first diffuses the light and then enhances it, greatly improving the uniformity and brightness of the light; then it is diffused through the first diffusion layer 31 and transmitted to the display panel 10, making the light entering the display panel 10 more uniform, which can greatly improve the uniformity of the display of the display panel 10 and improve the display quality of the display panel 10.

[0139] In other embodiments, reference is made to Figure 1 , Figure 6 , Figure 10 When the first diffusion layer 31 is farther away from the display panel 10 than the optical film group 33, the first prism layer 33-12 of the first dimming film 33-1 is farther away from the display panel than the third diffusion layer 33-11.

[0140] Under this setting, when the light emitted by the light source 23 in the backlight assembly 20 passes through the first diffusion layer 31, the first diffusion layer 31 diffuses the light. After diffusion, the light enters the optical film group 33, which first brightens the diffused light and then diffuses it before transmitting it to the display panel 10. This makes the light entering the display panel 10 more uniform, which can greatly improve the uniformity of the display on the display panel 10 and improve the display quality of the display panel 10.

[0141] In some embodiments, such as Figure 10 As shown, the optical film assembly 33 may further include a second prism layer 33-2, which is disposed on the side of the first prism layer 33-12 away from the third diffusion layer 33-11.

[0142] In some embodiments, refer to Figure 1 , Figure 6 , Figure 10 When the first diffusion layer 31 is closer to the display panel 10 than the optical film group 33, the second prism layer 33-2 can be closer to the display panel 10 than the first dimming film 33-1.

[0143] In some embodiments, such as Figure 1 , Figure 11 As shown, the first diffusion layer 31 can be farther away from the display panel 10 than the optical film group 33, and the optical film group 33 can be bonded to the support layer 32 through the second adhesive layer 35.

[0144] like Figure 1 , Figure 11 As shown, the surface of the support layer 32 near the display panel 10 may have multiple pyramidal structures 6.

[0145] The spacing between multiple pyramidal structures 6 can be less than 1.5mm, for example, it can be 0mm, 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, etc.

[0146] The depth of the pyramidal structure 6 can be greater than or equal to 60um and less than or equal to 65um, for example, it can be 60um, 61um, 62um, 63um, 64um, etc.

[0147] The thickness of the support layer 32 can be 1.6 mm.

[0148] The depth of the pyramidal structure 6 can be greater than the thickness of the second adhesive layer 35 to prevent the second adhesive layer 35 from completely filling the pyramidal structure 6. The thickness of the second adhesive layer 35 can be, for example, 50 μm.

[0149] like Figure 11 In the diffusion plate 30 shown, the thickness of the first diffusion layer 31 can range from 20 μm to 25 μm. For example, it can be 20 μm, 21 μm, 22 μm, 23 μm, 24 μm, or 25 μm.

[0150] In some embodiments, such as Figure 1 , Figure 10 , Figure 11 As shown, the optical film assembly may include a first dimming film 33-1, wherein the first prism layer 33-12 of the first dimming film 33-1 may be located away from the display panel 10 compared to the third diffusion layer 33-11.

[0151] Under this setting, the light emitted by the light source 23 in the backlight assembly 20 can be diffused by the first diffusion layer 31, then brightened by the optical film group 33, and then diffused before being emitted to the display panel 10, making the light entering the display panel 10 more uniform and improving the uniformity of the display on the display panel 10.

[0152] In some embodiments, the material of the first diffusion layer 31 and / or the second diffusion layer 36 may further include a diffusion sheet, and the haze of the first diffusion layer 31 and the second diffusion layer 36 may be greater than or equal to 95%.

[0153] like Figure 12 As shown in (a), when the material of the first diffusion layer 31 is a diffusion sheet, the first diffusion layer 31 (diffusion sheet) can be bonded to the support layer 32 through the third adhesive layer 38. The peel force of the third adhesive layer 38 can be greater than or equal to 30N / 25mm.

[0154] like Figure 12As shown in (b), when the material of the first diffusion layer 31 is diffusion ink, the first diffusion layer 31 (diffusion ink) can also be bonded to the support layer 32 through the third adhesive layer 38.

[0155] like Figure 12 As shown in (c), when the material of the first diffusion layer 31 is a diffusion sheet, the first diffusion layer 31 (diffusion sheet) can be bonded to the support layer 32 through the third adhesive layer 38. The peel force of the third adhesive layer 38 can be greater than or equal to 30N / 25mm.

[0156] In some embodiments, such as Figure 1 , Figure 13 As shown, one end of the support member 22 is connected to the edge region of the diffuser plate 30 away from the surface of the display panel 10.

[0157] For example, such as Figure 1 , Figure 13 As shown, the support member 22 may include a tip 22-1, which is attached to the edge portion of the diffuser plate 30 away from the surface of the display panel 10; the other end of the support member 22 is attached to the first portion 21-1 of the back plate 21.

[0158] The tip 22-1 of the support member 22 can be bonded to the diffuser plate 30 using UV adhesive. The UV adhesive can be a semi-solid UV-cured adhesive with an adhesion strength greater than 26 kgf / cm, a light transmittance greater than 90%, and a thickness of 0.2 mm.

[0159] For example, such as Figure 1 , Figure 13 As shown, a reflective layer 22-2 can be provided on the surface of the support member 22 near the diffuser plate 30.

[0160] For example, such as Figure 1 , Figure 13 As shown in (b), the surface of the support member 22 near the diffuser plate 30 can be white. White paint can be applied to the surface of the support member 22 near the diffuser plate 30 using a baking paint process. After application, the optical reflectivity of the paint can be greater than or equal to 80%, thereby forming a reflective layer 22-2.

[0161] For example, such as Figure 1 , Figure 13 As shown in (a), a white reflective tape can also be provided on the surface of the support member 22 near the diffuser plate 30. The reflectivity of the reflective tape can be greater than or equal to 80%, thereby forming a reflective layer 22-2.

[0162] In some embodiments, such as Figure 10 , Figure 14 As shown, it can be like Figure 10The optical film assembly 33 shown is disposed between the display panel 10 and the backlight assembly 20, and the optical film assembly 33 is bonded to the display panel 10. The peel force of the bonding adhesive can be greater than 30N / 25mm.

[0163] Some embodiments of this disclosure also provide a diffusion plate 30, such as Figure 5 As shown, the system includes a first diffusion layer 31, a support layer 32, an optical film assembly 33, and a sealing portion 34. The first diffusion layer 31 and the optical film assembly 33 are respectively disposed on both sides of the support layer 32 along its thickness direction. The sealing portion 34 is disposed around the sidewalls of the first diffusion layer 31, the support layer 32, and the optical film assembly 33. The diffusion plate 30 can diffuse and brighten the light incident on it, and transmit the light out of the diffusion plate 30. Detailed descriptions have been provided above and will not be repeated here.

[0164] This disclosure also provides a display device in some embodiments, including a display module 100 as described in the above embodiments, or including a diffuser plate as described in the above embodiments. The width of the peripheral area BB of the display module 100 described above can be set to be small, thereby achieving an extremely narrow bezel.

[0165] Some embodiments of this disclosure also provide a splicing display device, including multiple display modules 100 as described above, which are spliced ​​together. The width of the peripheral area BB of the display module 100 described above can be set to be small, thereby achieving an extremely narrow bezel.

[0166] The width of the seam between the splicing display devices (i.e., the sum of the widths of the peripheral areas BB of two adjacent display modules 100) can be 0.6mm to 1.2mm.

[0167] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0168] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A display module, characterized in that, include: Display panel; A backlight assembly is disposed on one side of the display panel along the first direction; The first direction is the thickness direction of the display panel; A diffuser plate is disposed between the display panel and the backlight assembly; the diffuser plate includes a first diffuser layer, a support layer, an optical film group and a sealing portion, the first diffuser layer and the optical film group are respectively disposed on both sides of the support layer along the first direction, and the sealing portion is disposed around the sidewalls of the first diffuser layer, the support layer and the optical film group; The diffuser plate is configured to diffuse and brighten the light from the backlight assembly and transmit the light to the display panel.

2. The display module according to claim 1, characterized in that, The support layer has multiple grooves on its surface near the optical film assembly.

3. The display module according to claim 2, characterized in that, The display panel includes multiple sub-pixels; The dimension of the groove along the second direction is smaller than the dimension of the sub-pixel along the second direction; and / or, the distance between adjacent grooves along the second direction is smaller than the dimension of the sub-pixel along the second direction; The second direction is perpendicular to the first direction.

4. The display module according to claim 1, characterized in that, The diffuser plate further includes a second diffuser layer disposed between the support layer and the optical film assembly.

5. The display module according to claim 4, characterized in that, The haze of the first diffusion layer and / or the second diffusion layer is greater than or equal to 95%.

6. The display module according to claim 4, characterized in that, The display panel includes multiple sub-pixels; The diffuser plate includes a plurality of first openings, the size of the first openings along the second direction being smaller than the size of the sub-pixel along the second direction; and / or, the distance between adjacent first openings along the second direction being smaller than the size of the sub-pixel along the second direction; the second direction is perpendicular to the first direction; The first opening is located in the second diffusion layer; or, The diffuser plate further includes a first adhesive layer, and the second diffuser layer is bonded to the optical film assembly through the first adhesive layer; the first opening is located in the first adhesive layer.

7. The display module according to claim 6, characterized in that, If the diffusion plate further includes a first adhesive layer, the first adhesive layer contains diffusion particles.

8. The display module according to any one of claims 1 to 7, characterized in that, The optical film assembly includes a first dimming plate, which includes a first prism layer and a third diffusion layer. The first diffusion layer is closer to the display panel than the optical film group, and the first prism layer of the first dimming sheet is closer to the display panel than the third diffusion layer; or... The first diffusion layer is farther away from the display panel than the optical film group, and the first prism layer of the first dimming sheet is farther away from the display panel than the third diffusion layer.

9. The display module according to claim 8, characterized in that, The optical film assembly also includes a second prism layer disposed on the side of the first prism layer away from the third diffusion layer.

10. The display module according to claim 1, characterized in that, The first diffusion layer is farther away from the display panel than the optical film group, and the support layer has multiple pyramidal structures on its surface near the display panel; The optical film assembly includes a first dimming film, which includes a first prism layer and a third diffusion layer, wherein the first prism layer is farther away from the display panel than the third diffusion layer.

11. The display module according to any one of claims 1 to 7, characterized in that, The reflectivity of the sealing part is greater than or equal to 85%.

12. The display module according to any one of claims 1 to 7, characterized in that, The backlight assembly includes: A back panel is disposed opposite to the display panel along the first direction and has a gap between it and the display panel; A support member is disposed circumferentially along the back plate and connected to the back plate; the support member extends along the first direction, and one end of the support member is connected to the edge region of the surface of the diffuser plate away from the display panel.

13. A diffusion plate, characterized in that, include: The structure comprises a first diffusion layer, a support layer, an optical film assembly, and a sealing portion. The first diffusion layer and the optical film assembly are respectively disposed on both sides of the support layer along its own thickness direction, and the sealing portion is disposed around the sidewalls of the first diffusion layer, the support layer, and the optical film assembly. The diffuser plate is configured to diffuse and brighten the light incident on it, and to transmit the light out of the diffuser plate.

14. A display device, characterized in that, include: The display module as described in any one of claims 1 to 12; Alternatively, the diffusion plate as described in claim 13.

15. A splicing display device, characterized in that, include: Multiple display modules as described in any one of claims 1 to 12, wherein the multiple display modules are spliced ​​together.

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