Display module and display device

Abstract

The utility model provides a display module and a display device. The display module comprises a display panel, a backlight module and a bonding layer. The display panel comprises a display area and a frame area arranged around the display area. The backlight module comprises a light guide plate and an optical film layer, the light guide plate is provided with a first face and a second face which are oppositely arranged, the first face is closer to the display panel than the second face, the first face comprises a first area and a second area arranged around the first area, and the second area is arranged around the first area. The optical film layer is arranged between the display panel and the first face, and the orthographic projection of the optical film layer on the first face is located in the first area. The bonding layer is arranged between the display panel and the first face, the orthographic projection of the bonding layer on the display panel is located in the frame area, and the orthographic projection of the bonding layer on the first face is located in the second area.

Description

Technical Field

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

[0002] Display modules, as display components of electronic devices, have been widely used in various electronic products. The ultra-thin and narrow-frame design of display modules are increasingly favored by terminal manufacturers and consumers.

[0003] In related art, a display module includes a backlight module and a display panel. The backlight module includes a backplane, a light guide plate, and a plastic frame. The plastic frame is located inside the backplane, and the display panel is located inside the plastic frame and supported on the plastic frame, thereby achieving a fixed connection between the backplane, plastic frame, and display panel. However, this configuration of the display module makes it difficult to achieve ultra-thinness and narrow bezels. Utility Model Content

[0004] A first aspect of an embodiment of the present disclosure provides a display module, including:

[0005] The display panel comprises a display area and a frame area arranged around the display area;

[0006] A backlight module, comprising a light guide plate and an optical film layer, wherein the light guide plate has a first surface and a second surface disposed opposite to each other, the first surface being closer to the display panel than the second surface, the first surface comprising a first region and a second region disposed around the first region, the optical film layer being disposed between the display panel and the first surface, and an orthographic projection of the optical film layer on the first surface being located in the first region;

[0007] An adhesive layer is provided between the display panel and the first surface, wherein the orthographic projection of the adhesive layer on the display panel is located in the frame area, and the orthographic projection of the adhesive layer on the first surface is located in the second area.

[0008] Optionally, the display panel includes a first polarizer, an array substrate, a liquid crystal layer, a color filter substrate, and a second polarizer stacked in sequence, wherein the first polarizer is close to the optical film layer;

[0009] The adhesive layer is provided between the array substrate and the first surface, and an orthographic projection of the adhesive layer on the array substrate and an orthographic projection of the first polarizer on the array substrate do not overlap with each other; and / or

[0010] There is an air gap between the first polarizer and the optical film layer. In a direction perpendicular to the display panel, the thickness of the adhesive layer is equal to the sum of the thicknesses of the first polarizer, the air gap and the optical film layer.

[0011] Optionally, the orthographic projection of the adhesive layer on the display panel is a first annular orthographic projection, the first annular orthographic projection surrounds the display area, and the first annular orthographic projection and the display area do not overlap with each other.

[0012] Optionally, the optical density of the adhesive layer is greater than or equal to 2; and / or

[0013] In the first direction, the thickness of the adhesive layer ranges from 0.05 mm to 0.5 mm, and the first direction is perpendicular to the display panel. In the second direction, the width of the adhesive layer ranges from 0.3 mm to 2 mm, and the second direction is perpendicular to the first direction.

[0014] Optionally, the orthographic projection of the light guide plate on the display panel is located within the display panel, and the orthographic projection of the light guide plate on the display panel covers the display area.

[0015] Optionally, the light guide plate includes a rigid light guide plate, and the rigid light guide plate includes a glass light guide plate.

[0016] Optionally, the light guide plate further includes: a side surface adjacent to the first surface and the second surface;

[0017] The backlight module further includes a first light shielding layer covering the second area and the side surface.

[0018] Optionally, the first light-shielding layer includes:

[0019] A first light shielding portion covers the second area, and an orthographic projection of the first light shielding portion on the display panel is located in the frame area and has a gap with the display area, and the gap is greater than or equal to 0.5 mm.

[0020] Optionally, the first light-shielding layer includes:

[0021] A first shading portion covers the second area, the orthographic projection of the first shading portion on the first surface is a second annular orthographic projection, and the inner edge of the second annular orthographic projection overlaps with the edge of the orthographic projection of the optical film layer on the first surface.

[0022] Optionally, the first light-shielding layer includes:

[0023] a first light shielding portion, covering the second area;

[0024] a second light shielding portion covering the side surface, wherein the second light shielding portion and the first light shielding portion are connected at a position where the side surface is adjacent to the first surface;

[0025] In a direction perpendicular to the first surface, the thickness of the first shading portion ranges from 0.006 mm to 0.03 mm, and in a direction perpendicular to the side surface, the thickness of the second shading portion ranges from 0.006 mm to 0.03 mm.

[0026] Optionally, the backlight module further includes: a second light shielding layer covering the second surface of the light guide plate; and / or

[0027] The backlight module further includes:

[0028] a reflective sheet, disposed on one side of the second surface of the light guide plate;

[0029] The bonding portion is arranged between the reflective sheet and the second surface.

[0030] Optionally, the side surface has a first circumferential angle at a position adjacent to the first surface, and the side surface has a second circumferential angle at a position adjacent to the second surface, and the first circumferential angle and the second circumferential angle respectively include: a rounded corner and / or a chamfered corner.

[0031] Optionally, in a direction perpendicular to the display panel, the width of the border area ranges from 1.0 mm to 1.4 mm; and / or

[0032] In a direction perpendicular to the display panel, the thickness of the display module ranges from 0.9 mm to 3.0 mm.

[0033] A second aspect of the embodiments of the present disclosure provides a display device, comprising a display module as described in any one of the first aspects.

[0034] The technical solutions provided in the embodiments of the present disclosure have at least the following technical effects or advantages:

[0035] The display module provided by the embodiment of the present disclosure includes a display panel, a backlight module and an adhesive layer. The display panel includes a display area and a frame area arranged around the display area. The backlight module includes a light guide plate and an optical film layer, the light guide plate has a first surface and a second surface arranged relatively to each other, the first surface is closer to the display panel than the second surface, the first surface includes a first area and a second area arranged around the first area, the optical film layer is arranged between the display panel and the first surface, and the orthographic projection of the optical film layer on the first surface is located in the first area. The adhesive layer is arranged between the display panel and the first surface, the orthographic projection of the adhesive layer on the display panel is located in the frame area, and the orthographic projection of the adhesive layer on the first surface is located in the second area. Therefore, the embodiment of the present disclosure utilizes the adhesive layer to realize the integration of the display panel and the backlight module, removes the middle frame structure (or glue frame structure) in the traditional display module, thereby realizing the lightness and thinness and narrow frame of the display module.

[0036] The above description is only an overview of the technical solutions provided by the embodiments of the present disclosure. In order to more clearly understand the technical means of the embodiments of the present disclosure, they can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiments of the present disclosure more obvious and easy to understand, the specific implementation methods of the embodiments of the present disclosure are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present disclosure. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0038] Figure 1 A schematic diagram of a partial cross-sectional structure of a display module in the related art is shown;

[0039] Figure 2 A partial cross-sectional structural diagram of another display module in the related art is shown;

[0040] Figure 3 A schematic diagram of a partial cross-sectional structure of a display module according to an embodiment of the present disclosure is shown;

[0041] Figure 4 A schematic diagram of a planar structure of a display panel according to an embodiment of the present disclosure is shown;

[0042] Figure 5 A schematic diagram of a partial cross-sectional structure of a light guide plate according to an embodiment of the present disclosure is shown;

[0043] Figure 6 A partial three-dimensional structural diagram of a backlight module of the related art is shown;

[0044] Figure 7 Another partial three-dimensional structural diagram of a backlight module of the related art is shown;

[0045] Figure 8 A schematic diagram of a partial cross-sectional structure of a backlight module according to an embodiment of the present disclosure is shown;

[0046] Figure 9 A schematic diagram of a planar structure of a light guide plate according to an embodiment of the present disclosure is shown;

[0047] Figure 10 Another partial cross-sectional structural diagram of the backlight module according to an embodiment of the present disclosure is shown;

[0048] Figure 11 Another partial cross-sectional structural diagram of the backlight module according to an embodiment of the present disclosure is shown;

[0049] Figure 12 A schematic diagram of a partial cross-sectional structure of a display panel according to an embodiment of the present disclosure is shown;

[0050] Figure 13 A schematic diagram of a partial cross-sectional structure of a light guide plate according to an embodiment of the present disclosure is shown;

[0051] Figure 14 Another partial cross-sectional structural diagram of the light guide plate according to an embodiment of the present disclosure is shown;

[0052] Figure 15 A structural block diagram of a display device according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0053] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that the term "plurality" appearing herein includes two or more than two.

[0054] As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of deviation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0055] As used herein, "parallel", "perpendicular", and "equal" include the situations described and situations similar to the situations described, and the range of the similar situations is within an acceptable deviation range, wherein the acceptable deviation range is as determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity can also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality can be, for example, that the difference between the two equals is less than or equal to 5% of either one.

[0056] It will be understood that when a layer or element is referred to as being on another layer or substrate, it can be directly on the other layer or substrate, or intervening layers may be present therebetween.

[0057] Display modules, as the display components of electronic devices, have been widely used in various electronic products. Ultra-thin and narrow-frame designs are increasingly favored by end-user manufacturers and consumers. For example, a display module can be a display screen, mobile phone, laptop computer, tablet computer, wearable display module (such as smartwatches and smart glasses), television, digital photo frame, or any other electronic product or component with a display function.

[0058] For example, LCD (Liquid Crystal Display) display module is one of the most common display modules currently, with a wide range of applications, including but not limited to handheld LCD products, car-mounted LCD products, large-size LCD products (such as TV (Television) products), etc.

[0059] See also Figure 1 , shows a schematic diagram of a partial cross-sectional structure of a display module in the related art.

[0060] like Figure 1 As shown, illustratively, the display module 100 generally includes a display panel 104 and a backlight module. The backlight module mainly includes: a middle frame 101, a light source, a back plate, a light guide plate 102 and an optical film layer 103 (such as a diffuser plate and a reflector, etc.). The middle frame 101 of the backlight module is arranged on one side of the display panel 104. The middle frame 101 is provided with a carrying platform that can carry the display panel 104, and a receiving area that can accommodate the light guide plate 102, the diffuser plate and the reflector, etc. The carrying platform needs to be connected and fixed to the frame area of ​​the display panel 104 by an adhesive, and the middle frame 101 is located on the outside of the bottom plate of the back plate. The surface of the middle frame 101 is polished with a lens. The main function of the middle frame 101 is to reflect the light emitted by the light source and support the light guide plate 102, the diffuser plate and the reflector, etc. The back plate of the backlight module can support the middle frame 101. However, the display module 100 configured in this manner is difficult to achieve ultra-thinness and narrow frame due to the limitation of the middle frame 101 .

[0061] See also Figure 2 , shows a schematic diagram of a partial cross-sectional structure of another display module in the related art.

[0062] like Figure 2As shown, exemplarily, the display module 1' includes a backlight module 10' and a display panel 20', the backlight module 10' includes a back plate 11' and a plastic frame 12', the plastic frame 12' is arranged on the inner side of the back plate 11', the display panel 20' is arranged on the inner side of the plastic frame 12' and is supported on the plastic frame 12', and the light-shielding tape 30' is wrapped around the back plate 11', the plastic frame 12' and the display panel 20', so as to achieve fixation between the back plate 11', the plastic frame 12' and the display panel 20'. Due to the limitation of the frame, it is difficult to achieve ultra-thinness and narrow frame of the display module 1' with such a configuration.

[0063] The inventor of the disclosed embodiment noted that by changing the module design of the display module, directly bonding and fixing the light guide plate to the display module, and removing the middle frame (or plastic frame), the display module can be made ultra-thin and have a narrow border. At the same time, the middle frame and the plastic frame can be prevented from blocking the light emitted from the backlight source of the backlight module, thereby avoiding problems such as dark frames and edge pixels being blocked.

[0064] See also Figure 3 , which shows a schematic diagram of a partial cross-sectional structure of a display module according to an embodiment of the present disclosure.

[0065] The display module 10 of the embodiment of the present disclosure may be a liquid crystal display module 10 , an organic light emitting diode (OLED) display module 10 , or an electrophoretic display module 10 . In the following embodiments, the display module 10 is described as a liquid crystal display module 10 .

[0066] like Figure 3 As shown, the display module 10 of the embodiment of the present disclosure includes: a display panel 1, a backlight module 2, and an adhesive layer 3. The display panel 1 includes a display area 11 and a frame area 12 arranged around the display area 11. The backlight module 2 includes a light guide plate 21 and an optical film layer 22. The light guide plate 21 has a first surface 21A and a second surface 21B arranged opposite to each other. The first surface 21A is closer to the display panel 1 than the second surface 21B. The first surface 21A includes a first area 21C and a second area 21D arranged around the first area 21C. The optical film layer 22 is arranged between the display panel 1 and the first surface 21A. The orthographic projection of the optical film layer 22 on the first surface 21A is located in the first area 21C. The adhesive layer 3 is arranged between the display panel 1 and the first surface 21A. The orthographic projection of the adhesive layer 3 on the display panel 1 is located in the frame area 12, and the orthographic projection of the adhesive layer 3 on the first surface 21A is located in the second area 21D.

[0067] Therefore, the embodiment of the present disclosure directly bonds and fixes the display panel 1 and the backlight module 2 through the adhesive layer 3, thereby realizing the integration of the display panel 1 and the backlight module 2, removing the middle frame (or plastic frame) in the traditional display module 10, thereby realizing the ultra-thinness and narrow frame of the display module 10, and making the display module 10 lighter; at the same time, it can reduce the preparation cost of the display module 10; in addition, it can avoid the middle frame and the plastic frame from blocking the light emitted by the backlight source of the backlight module 2, so as to avoid problems such as dark frames and edge pixels being blocked.

[0068] Exemplarily, the display panel 1 (Cell) is the display structure of the display module 10, including an array substrate 14, a liquid crystal layer, and a color filter substrate 15. This embodiment does not elaborate on this structure in detail. Depending on the display principle, the display panel 1 can be an organic light emitting diode (OLED) display panel 1, a quantum dot light emitting diode (QLED) display panel 1, a micro-light emitting diode (Mini-LED or Micro-LED) display panel 1, etc. It can also be a liquid crystal display (LCD) panel. The following description takes the LCD display panel 1 as an example.

[0069] Among them, the backlight module 2 is used to provide a backlight source with uniform brightness distribution for the display panel 1. The backlight module 2 is provided with a backlight source around the light guide plate 21 or in the light guide plate 21. When the light emitted by the backlight source enters the light guide plate 21, the light guide plate 21 can process the light, for example, changing the propagation direction of the light so that the light is emitted from the light emitting surface of the light guide plate 21 to provide backlight for the display panel 1. Exemplarily, the type of the backlight source can be LED (Light Emitting Diode, light emitting diode), Mini-LED, QLED (Quantum Dot Light Emitting Diodes, quantum dot light emitting diode), etc. Unless otherwise specified, LED is used as an example for description in this embodiment.

[0070] It should be noted that the first surface 21A of the light guide plate 21 refers to the side facing the display panel 1. The light emitted by the backlight source of the backlight module 2 is emitted from the first surface 21A of the light guide plate 21, and then is processed by the optical film layer 22 (such as diffusion and uniform light, etc.) and then enters the display panel 1.

[0071] Among them, the first surface 21A includes a first area 21C and a second area 21D arranged around the first area 21C. It can be understood that the first area 21C can refer to the light-emitting area, that is, the light emitted from the first surface 21A of the light guide plate 21 is emitted from the first area 21C; thus, the second area 21D can refer to the non-light-emitting area, that is, the light emitted from the first surface 21A of the light guide plate 21 will not be emitted from the second area 21D. For example, a shading layer is provided in the second area 21D to block the light corresponding to the second area 21D.

[0072] In some embodiments, the orthographic projection area of ​​the light guide plate 21 on the display panel 1 is substantially the same as the area of ​​the display panel 1. In other words, the size of the light guide plate 21 is substantially the same as the size of the display panel 1. Therefore, when the display module 10 is in use, when a user views the display module 10, since the light guide plate 21 is substantially the same size as the display panel 1, the user can only see the presence of the display panel 1, thereby achieving the full-screen and narrow-frame effect of the display module 10.

[0073] In some embodiments, the orthographic projection of the light guide plate 21 on the display panel 1 is located inside the display panel 1 , and the orthographic projection of the light guide plate 21 on the display panel 1 covers the display area 11 .

[0074] It can be understood that since the middle frame (or plastic frame) is removed, the area of ​​the display panel 1 is not restricted by the middle frame (or plastic frame) provided by the traditional back panel during design. For example, the area of ​​the display panel 1 can be designed to be larger than the light guide plate 21. Therefore, when the user views the display module 10, since the backlight module 2 is located on the side of the display panel 1 facing away from the user, the user can only see the existence of the display panel 1, thereby achieving the full screen and narrow frame effect of the display module 10.

[0075] Exemplarily, the orthographic projection of the first region 21C on the display panel 1 covers the display area 11, and the orthographic projection of the second region 21D on the display panel 1 is located in the border area 12. For example, the orthographic projection of the first region 21C on the display panel 1 is larger than the display area 11. In other words, the first region 21C can completely cover the display area 11 of the display panel 1 with some space left, and there is a gap between the orthographic projection of the second region 21D and the display area 11. As a result, when the display panel 1 displays images, the second region 21D will not be affected by the display area 21D, resulting in dark shadows, blurred edges, and other issues.

[0076] Based on the above introduction to the display panel 1 and the light guide plate 21 , the optical film layer 22 disposed between the display panel 1 and the light guide plate 21 will be introduced below.

[0077] The optical film layer 22 is disposed between the display panel 1 and the first surface 21A of the light guide plate 21. The orthographic projection of the optical film layer 22 on the first surface 21A is located in the first region 21C. For example, the orthographic projection of the optical film layer 22 on the first surface 21A is substantially aligned with the first region 21C. As a result, light from the backlight source can be completely received by the optical film layer 22 after exiting the first region 21C. The light is processed (e.g., diffused and homogenized) by the optical film layer 22 before entering the display panel 1.

[0078] In some embodiments, the optical film layer 22 includes a combination of a diffuser and a prism sheet, wherein there may be one or more diffusers and one or more prism sheets, and thus, there may also be one or more optical film layers 22. Thus, light emitted from the first surface 21A of the light guide plate 21 is processed by the optical film layer 22 and then incident on the display panel 1.

[0079] Based on the above description of the display panel 1 , the light guide plate 21 and the optical film layer 22 , the adhesive layer 3 provided between the display panel 1 and the first surface 21A of the light guide plate 21 will be described below.

[0080] It is understandable that the display panel 1 and the first surface 21A of the light guide plate 21 are directly bonded and fixed by the adhesive layer 3, thereby removing the middle frame (or plastic frame) in the traditional display module 10, and realizing ultra-thin and narrow frame of the display module 10.

[0081] The orthographic projection of the adhesive layer 3 on the display panel 1 is located in the frame area 12. For example, the orthographic projection of the adhesive layer 3 on the display panel 1 is substantially consistent with the frame area 12. Alternatively, the outer edge of the orthographic projection of the adhesive layer 3 on the display panel 1 is at a certain distance from the edge of the frame area 12, such as 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, etc. Alternatively, the inner edge of the orthographic projection of the adhesive layer 3 on the display panel 1 is at a certain distance from the edge of the display area 11, such as 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, etc. As a result, the adhesive layer 3 can achieve bonding and fixing of the display panel 1 and the light guide plate 21 without affecting the display effect of the display area 11, thereby ensuring the display yield of the display area 11.

[0082] Continue to see Figure 3 In some embodiments, the display panel 1 includes a first polarizer 13, an array substrate 14, a liquid crystal layer (not shown), a color filter substrate 15, and a second polarizer 16 stacked in sequence, wherein the first polarizer 13 is close to the optical film layer 22;

[0083] The adhesive layer 3 is disposed between the array substrate 14 and the first surface 21A, and the orthographic projection of the adhesive layer 3 on the array substrate 14 does not overlap with the orthographic projection of the first polarizer 13 on the array substrate 14 .

[0084] It should be noted that since the first polarizer 13 and the optical film layer 22 are both optical films, the optical films may wrinkle or develop other problems when squeezed, thereby affecting the display effect. Therefore, if the adhesive layer 3 is directly bonded to the first polarizer 13 and / or the optical film layer 22, the first polarizer 13 and the optical film layer 22 may be deformed or wrinkled. The array substrate 14 is usually made of a base material with a certain strength, such as a glass substrate. On this basis, the embodiment of the present disclosure provides an adhesive layer 3 between the array substrate 14 and the first surface 21A, so as not to affect the optical performance of the optical film while enabling the adhesive layer 3 to play a certain supporting role for the display panel 1 and the backlight module 2.

[0085] In some embodiments, the display panel 1 includes a first polarizer 13, an array substrate 14, a liquid crystal layer, a color film substrate 15, and a second polarizer 16 stacked in sequence, the first polarizer 13 is close to the optical film layer 22, and there is an air gap 4 between the first polarizer 13 and the optical film layer 22; in a direction perpendicular to the display panel 1, the thickness of the adhesive layer 3 is equal to the sum of the thicknesses of the first polarizer 13, the air gap 4, and the optical film layer 22.

[0086] It is understandable that under certain conditions (such as high temperature or humid conditions), the optical film layer 22 may expand due to heat or other reasons, resulting in an increase in the thickness of the optical film layer 22 in a direction perpendicular to the display panel 1. Therefore, in order to avoid squeezing of the optical film layer 22 during expansion, resulting in poor picture quality problems such as wrinkles, the embodiment of the present disclosure reserves an air gap 4 between the first polarizer 13 and the optical film layer 22 when using the adhesive layer 3 to bond the display panel 1 and the light guide plate 21. That is, the thickness of the adhesive layer 3 is equal to the sum of the thicknesses of the first polarizer 13, the air gap 4 and the optical film layer 22, thereby reserving expansion space for the optical film layer 22 to avoid problems such as wrinkles.

[0087] Continue to see Figure 3In some embodiments, the thickness of the adhesive layer 3 in the first direction X, which is perpendicular to the display panel 1, ranges from 0.05 mm to 0.5 mm. For example, the thickness of the adhesive layer 3 can be 0.05 mm, 0.07 mm, 0.08 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.24 mm, 0.28 mm, 0.3 mm, 0.36 mm, 0.41 mm, 0.48 mm, or 0.5 mm. Specifically, the thickness can be determined based on one or more of the thickness of the first polarizer 13, the thickness of the optical film layer 22, and the thickness of the air gap 4, and is not limited here.

[0088] In some embodiments, in the second direction Y, the width of the adhesive layer 3 ranges from 0.3 mm to 2 mm. The second direction is perpendicular to the first direction. It can be understood that the second direction can be the direction of the display area 11 toward the border area 12, or the direction of the border area 12 toward the display area 11.

[0089] It is understood that, in addition to achieving adhesion and fixation between the display panel 1 and the backlight module 2, the adhesive layer 3 also needs to provide a certain degree of support to prevent the first polarizer 13 and the optical film layer 22 from squeezing each other, thereby preventing problems such as wrinkles in the optical film layer 22. Therefore, on the basis of the adhesive layer 3 having a certain thickness, in order to improve the support strength of the adhesive layer 3, the width of the adhesive layer 3 in the second direction can be increased. The thickness of the adhesive layer 3 in the second direction can be: 0.3 mm, 0.35 mm, 0.40 mm, 0.45 mm, 0.5 mm, 0.7 mm, 0.9 mm, 1.0 mm, 1.5 mm, 1.8 mm, 2.0 mm, etc. It is understood that the width of the adhesive layer 3 in the second direction can not exceed the outer edge of the border area 12 of the display panel 1.

[0090] See also Figure 4 , shows a schematic diagram of a planar structure of the display panel 1 according to an embodiment of the present disclosure. It can be understood that, Figure 4 It is a plan view of the side of the display panel 1 close to the backlight module 2 .

[0091] In some embodiments, the orthographic projection of the adhesive layer 3 on the display panel 1 is a first annular orthographic projection 31 . The first annular orthographic projection 31 surrounds the display area 11 , and the first annular orthographic projection 31 does not overlap with the display area 11 .

[0092] It is understandable that as demand for narrower bezels on the display module 10 increases, the border region 12 of the display module 10 may be narrower, for example, to a value less than or equal to 1.5 mm. To enhance the structural stability of the bonded display module 10 and the light guide plate 21, the orthographic projection of the adhesive layer 3 on the first surface 21A may be annular. In other words, the adhesive layer 3 is disposed around the display region 11, thereby maximizing the use of the gap between the display panel 1 and the light guide plate 21 in the border region 12 and improving the structural stability of the display module 10.

[0093] Exemplarily, the adhesive layer 3 may include an adhesive. It should be noted that the term "adhesive" should be understood in a broad sense, and any liquid or solid having adhesive properties that can achieve the attachment of the light guide plate 21 to the display panel 1 can be used as the adhesive according to the embodiment of the present disclosure. The specific type of adhesive is not particularly limited. For example, the adhesive may include at least one of glue, photoresist, optical glue, semi-solid glue, foam glue or PET (Polyethylene Glycol Terephthalate) glue. The above-mentioned adhesives are widely available and easy to obtain, thereby saving production costs and facilitating the promotion and large-scale utilization of the light guide plate 21.

[0094] It is understood that, based on the above, the adhesive layer 3 not only achieves bonding and fixing between the display panel 1 and the backlight module 2, but also needs to provide a certain degree of support to prevent the first polarizer 13 and the optical film layer 22 from being squeezed against each other, thereby causing problems such as wrinkles in the optical film layer 22. Therefore, in the process flow for preparing the adhesive layer 3, a moisture curing process or a UV (Ultraviolet curing) process can be used to improve the support strength of the adhesive layer 3.

[0095] In some embodiments, the adhesive layer 3 has a cushioning property and is made of cushioning foam. Thus, when the display module 10 is subjected to an external force, the adhesive layer 3 can buffer the force between the display panel 1 and the light guide plate 21, releasing the applied stress and improving the reliability of the display module 10.

[0096] Illustratively, the adhesive layer 3 has dustproof and waterproof properties, thereby further improving the reliability of the display module 10 .

[0097] For example, since the adhesive layer 3 corresponds to the second area 21D of the light guide plate 21 and the frame area 12 of the display panel 1, the second area 21D is a non-light-emitting area, and the frame area 12 is a non-display area 11. Therefore, the adhesive layer 3 can have a light-shielding property, and the optical density (OD value, Optical Density, or absorbance, transmittance) of the adhesive layer 3 can be greater than or equal to 2, for example, the optical density is 2, 2.5, 2.8, 3, 3.2, 3.4, 4.5, 5, 6, etc. Among them, the optical density represents the common logarithm of the ratio of the intensity of light incident on the adhesive layer 3 to the intensity of transmitted light, such as the logarithm of log10. It can be understood that the greater the optical density, the better the light-shielding property of the adhesive layer 3.

[0098] It is understood that in the process of preparing the adhesive layer 3, a mark can be pre-set on the display panel 1 (array substrate 14) using the positioning technology of a CCD (Charge Coupled Device) device. The mark can be obtained by the CCD device, and glue or other materials can be applied at the marked position to achieve the adhesive layer 3 on one side of the display panel 1 (array substrate 14). Similarly, a mark can be pre-set on the light guide plate 21, and the mark can be obtained by the CCD device. Glue or other materials can be applied at the marked position to achieve the adhesive layer 3 on one side of the light guide plate 21. In this way, the display panel 1 and the light guide plate 21 are bonded and fixed.

[0099] It can be understood that, based on the above, the embodiment of the present disclosure can achieve ultra-thinness and narrow frame of the display module 10 by directly bonding and fixing the display panel 1 and the light guide plate 21, and removing the middle frame (or plastic frame) in the traditional display module 10. In the traditional display module 10, the backlight module 2 usually also needs to be provided with a back plate to provide support for the light guide plate 21 and the optical film layer 22, etc., to ensure the strength of the backlight module 2. However, the provision of the back plate will undoubtedly increase the thickness of the display module 10, which is inconsistent with the design of the ultra-thin display module 10 of the embodiment of the present disclosure. In view of this, the embodiment of the present disclosure further achieves ultra-thinness of the display module 10 by providing the light guide plate 21 as a rigid light guide plate 21. The light guide plate 21 itself has sufficient strength to provide support for the backlight source and the optical film layer 22 provided on the light guide plate 21, thereby replacing the back plate of the traditional display module 10. The light guide plate 21 is further introduced below.

[0100] In some embodiments, the light guide plate 21 comprises a rigid light guide plate 21 . The rigid light guide plate 21 can be made of glass, PMMA (Poly Methyl Meth Acrylate), FR4 (Flame Retardant Type 4), BT (Triazine and Bismaleimide), ceramic, or the like. For example, a glass light guide plate 21 has a low coefficient of expansion, so the ultra-thin design of the display module 10 does not significantly deform, thereby improving the reliability of the display module 10 .

[0101] For example, during the manufacturing process of the glass light guide plate 21, a chemical strengthening process is performed on the first surface 21A and the second surface 21B of the glass light guide plate 21 to improve the strength of the glass light guide plate 21. It is understood that chemical strengthening means improving the strength of the glass light guide plate 21 by changing the surface composition of the glass light guide plate 21. This involves exchanging other alkali metal ions with Na+ or K+ ions in the glass surface layer, thereby forming an ion exchange layer on the surface of the glass substrate. When the glass light guide plate 21 cools to room temperature, the inner layer of the glass light guide plate 21 is in tension and the outer layer is in compression, thereby achieving the purpose of increasing strength.

[0102] For example, when the glass light guide plate 21 is subjected to a reliability test, the test parameter requirements may be: a 4PB (4 point bend) value greater than 350, and no breakage occurs under pressures of 450 MPa and 550 MPa.

[0103] See also Figure 5 , shows a schematic diagram of the partial cross-sectional structure of the light guide plate 21 of an embodiment of the present disclosure.

[0104] In some embodiments, the first surface 21A and / or the second surface 21B of the light guide plate 21 is coated with a coating 23 . The coating 23 may be made of an organic material, such as an organic polymer material, and may also include an inorganic material, an additive, and the like.

[0105] In a specific implementation, the organic material may be coated on the first surface 21A and / or the second surface 21B of the light guide plate 21 by one or more coating processes such as spraying, flow coating, sputtering, slit coating, spin coating, and blade coating to form the coating layer 23 .

[0106] In the embodiment of the present disclosure, since the coating 23 is coated on the surface of the light guide plate 21 instead of being attached to the surface of the light guide plate 21 by bonding, the coating 23 in the embodiment of the present disclosure has higher adhesion to the surface of the light guide plate 21 and stronger tear resistance, which can further improve the reliability of the light guide plate 21.

[0107] In a specific implementation, the light guide plate 21 can be coated on one side, for example, the coating 23 is coated on the first side 21A, or the coating 23 is coated on the second side 21B. Alternatively, the light guide plate 21 can be coated on both sides, for example, the coating 23 is coated on the first side 21A and the second side 21B.

[0108] Therefore, by coating the coating 23 on the first surface 21A and / or the second surface 21B of the light guide plate 21, when the light guide plate 21 is impacted or squeezed by external force, the coating 23 can absorb and transform part of the external force through its own elasticity or plastic deformation, thereby protecting the light guide plate 21 and improving the ability of the light guide plate 21 to resist squeezing, impact and falling.

[0109] It is understood that when the backlight module 2 has different backlight source types, the light guide plate 21 may adopt different structures. For example, the backlight module 2 includes an edge-type backlight source and a direct-type backlight source. For ease of understanding, the following describes the backlight module 2 including an edge-type backlight source and the backlight module 2 including a direct-type backlight source in the related art.

[0110] See also Figure 6 , shows a partial three-dimensional structural schematic diagram of a backlight module in the related art.

[0111] like Figure 6As shown, a backlight module with an edge-lit light guide plate 01 includes a backlight source (not shown), a light guide plate 01, an optical film layer 02, and a backplate 03. The backlight source is disposed on the side of the light guide plate 01 and is used to emit light toward the light guide plate 01, thereby using the light guide plate 01 to guide the side-incident light to be emitted from the light-exiting surface of the light guide plate 01. The optical film layer 02 includes a diffuser and a prism sheet, and can include one or more optical film layers 02. Multiple optical film layers 02 are stacked on the light-exiting surface of the light guide plate 01 to diffuse and even the light emitted from the light-exiting surface. The light guide plate 01 is arranged on the side surface of the back plate 03 close to the light emitting surface, and a plurality of optical film layers 02 are sequentially stacked on the side surface of the light guide plate 01 close to the light emitting surface. The backlight source is fixed on the side surface of the light guide plate 01. That is, the back plate 03 is arranged on the side of the internal components of the backlight module away from the light emitting surface. In this way, the back plate 03 can be used to support the entire backlight module and encapsulate the back side. For example, the back plate 03 has a U-shaped bend 032 at the edge. The U-shaped bend 032 includes two parts that are respectively perpendicular to the surface of the back plate body 031 and parallel to the surface of the back plate body 031. It can enclose a groove 0321 at the edge of the back plate 03 to accommodate the backlight source and the edge portion of the light guide plate 01, so as to fix the backlight source and prevent light leakage at the position where the backlight source is located. Moreover, the U-shaped bend 032 can also be used as a reinforcing rib to strengthen the edge of the backlight module, thereby supporting the edge of the display device. However, using the back plate 03 to support the entire backlight module and encapsulate the back side will undoubtedly increase the thickness of the backlight module. In addition, using U-shaped bends to accommodate the backlight source and the edge of the light guide plate 01 will undoubtedly increase the frame width of the backlight module.

[0112] See also Figure 7 , shows another partial three-dimensional structural schematic diagram of a backlight module in the related art.

[0113] like Figure 7As shown, a backlight module with a direct-lit light guide plate includes: a backlight source, a light guide plate, an optical film layer 002, and a back panel 003. The backlight source is arranged on the light guide plate as the primary light source; for example, the light guide plate has a plurality of light zones arranged in an array, each light zone includes at least one Mini-Led, and each light zone can be independently controlled, so that the pixels in the corresponding area of ​​the light zone can obtain accurate backlight brightness. The light guide plate and the plurality of optical film layers 002 are sequentially stacked on the surface of the back panel 003. The edge of the back panel 003 has only a narrow bending structure 0032 perpendicular to the surface of the back panel body 0031. Consequently, compared with the back panel 003 with a U-shaped bending structure 0032 in the related art, the edge strength of the back panel 003 in this backlight module is lower. Therefore, a rubber frame 004 is required to support the edge of the backlight module, thereby protecting the plurality of optical film layers 002 and the light panel 001 and preventing light leakage. However, as narrow borders and thin thickness gradually become common technical requirements for display modules, the presence of the plastic frame 004 increases the width and thickness of the border of the display module.

[0114] Through the above introduction to the backlight module 2 in the related art, it can be found that the traditional backlight module 2 supports the light guide plate 21 by setting a back plate and a rubber frame, while the embodiment of the present disclosure has removed the back plate and the rubber frame by directly bonding and fixing the light guide plate 21 to the display panel 1, and improving the strength of the light guide plate 21, thereby achieving ultra-thinness and narrow frame of the display module 10. When the light guide plate 21 is prepared using a transparent substrate, in addition to considering the support strength of the light guide plate 21, it is also necessary to consider the shading and light transmission of the light guide plate 21, so as to avoid light leakage from the backlight module 2, resulting in poor display (for example, excessive brightness in the edge area, etc.) or poor light utilization. Therefore, the following mainly explains how the backlight module 2 using a transparent light guide plate 21 solves the shading problem and improves the light utilization.

[0115] See also Figure 8 , shows a schematic diagram of a partial cross-sectional structure of the backlight module 2 of an embodiment of the present disclosure.

[0116] It can be understood that the thickness of the first light shielding layer 24 and the second light shielding layer 25 are substantially smaller. Figure 8 For the convenience of explanation, the thicknesses of the first light-shielding layer 24 and the second light-shielding layer 25 are explicitly shown.

[0117] In some embodiments, the light guide plate 21 further includes a side surface 21E adjacent to the first surface 21A and the second surface 21B; the backlight module 2 further includes a first light shielding layer 24 covering the second area 21D and the side surface 21E.

[0118] It can be understood that since the second area 21D is a non-light-emitting area, by covering the second area 21D with the first shading layer 24, the light corresponding to the second area 21D can be blocked, thereby preventing the light from being emitted into the second area 21D and causing light leakage. In addition, in order to avoid the light from being emitted from the side 21E of the light guide plate 21 and causing light leakage, the first shading layer 24 is also covered on the side 21E to further reduce the light leakage problem and improve the display effect of the display module 10.

[0119] Exemplarily, the first light-shielding layer 24 can be made of black material, which has a light-absorbing effect, so that the first light-shielding layer 24 can absorb light leaking from the second area 21D and the side 21E of the first surface 21A of the light guide plate 21, thereby reducing the problem of light leakage of the display panel 1.

[0120] For example, the first light shielding layer 24 is made of black ink, which is printed on the second area 21D of the first surface 21A of the light guide plate 21 and the side 21E of the light guide plate 21. The black coating 23 formed by the black ink can absorb the light leaked from the side 21E of the light guide plate 21 and the light leaked from the second area 21D.

[0121] The black ink can be made of materials such as anthraquinone, azo, metal coordination compounds, and perylene compounds, such as ink materials, such as black ink materials. The preparation process of the black ink material can adopt inkjet printing, pad printing, and other processes.

[0122] For example, during the preparation process of the first light-shielding layer 24, the light guide plate 21 and optical film layer 22 can be assembled and placed on a carrier, with the edge of the light guide plate 21 suspended in the air. This prevents interference with the carrier during printing, which could affect the printing effect. In practice, a pressure head is used to absorb the ink, and through deformation of the pressure head, the ink is transferred to the second area 21D and side surface 21E of the first surface 21A of the light guide plate 21.

[0123] In some embodiments, the first light-shielding layer 24 may also be made of light-shielding tape, which may be a cushioning foam, a PET tape, or the like.

[0124] In some embodiments, the first light shielding layer 24 includes:

[0125] The first light shielding portion 24A covers the second area 21D. The orthographic projection of the first light shielding portion 24A on the display panel 1 is located in the frame area 12 and has a gap with the display area 11 .

[0126] It is understood that since light entering the light guide plate 21 passes through the first region 21C and then enters the display area 11 of the display panel 1 for display, when the size of the light guide plate 21 is substantially the same as that of the display panel 1, the second region 21D can correspond in position to the frame area 12. Therefore, the first light shielding portion 24A covers the second region 21D, thereby shielding the light corresponding to the second region 21D within the light guide plate 21. As a result, the light emitted from the light guide plate 21 does not enter the frame area 12 of the display panel 1, thereby avoiding the problem of light leakage at the edge of the display area 11 of the display panel 1.

[0127] Furthermore, to prevent the appearance of dark shadows or blurred edges in the display image after light enters the display panel 1, such as the appearance of black shadows at the edges of the display image, the present embodiment provides a certain gap between the first light shielding portion 24A and the display area 11. This prevents the first light shielding portion 24A from appearing in the display image, thereby reducing interference between the light emitted by the light guide plate 21 and the first light shielding portion 24A, thereby avoiding the appearance of dark shadows in the display image and affecting the display effect. Exemplarily, the gap between the orthographic projection of the first light shielding portion 24A on the display panel 1 and the display area 11 is greater than or equal to 0.5 mm, for example, 0.5 mm, 0.55 mm, 0.6 mm, 0.65 mm, 0.70 mm, 0.75 mm, 0.80 mm, etc.

[0128] See also Figure 9 , shows a schematic planar structural diagram of the light guide plate 21 according to an embodiment of the present disclosure. It can be understood that, Figure 9 This is a plan view of the first surface 21A of the light guide plate 21 .

[0129] In some embodiments, the first light shielding layer 24 includes:

[0130] The first shading portion 24A covers the second area 21D, and the orthographic projection of the first shading portion 24A on the first surface 21A is a second annular orthographic projection 24A1, and the inner edge of the second annular orthographic projection 24A1 overlaps with the edge of the orthographic projection of the optical film layer 22 on the first surface 21A.

[0131] It is understood that since the frame area 12 is disposed around the display area 11, the orthographic projection of the first light shielding portion 24A on the display panel 1 is located in the frame area 12. If the orthographic projection of the first light shielding portion 24A on the first surface 21A is a second annular projection, it is possible to shield all positions on the first surface 21A of the light guide plate 21 corresponding to the frame area 12, thereby preventing light from leaking into the non-light-emitting area and the non-display area 11. In addition, the inner edge of the second annular orthographic projection 24A1 overlaps with the edge of the orthographic projection of the optical film layer 22 on the first surface 21A, allowing the light emitted from the first surface 21A of the light guide plate 21 to fully enter the optical film layer 22, further reducing the problem of light leakage.

[0132] In some embodiments, the first light shielding layer 24 includes:

[0133] A first light shielding portion 24A, covering the second area 21D;

[0134] The second light shielding portion 24B covers the side surface 21E, and the second light shielding portion 24B and the first light shielding portion 24A are connected at a position where the side surface 21E is adjacent to the first surface 21A.

[0135] It is understood that the position where the side surface 21E is adjacent to the first surface 21A may refer to the position where the side surface 21E intersects the first surface 21A. For example, the light guide plate 21 has four side surfaces 21E, and each side surface 21E intersects with the first surface 21A.

[0136] Since the first light-shielding portion 24A covers the second area 21D and the second light-shielding portion 24B covers the side surface 21E, if the second light-shielding portion 24B is connected to the first light-shielding portion 24A at a position adjacent to the side surface 21E and the first surface 21A, it means that the junction between the side surface 21E and the first surface 21A is also shielded, that is, the first light-shielding layer 24 can completely wrap the side surface 21E of the light guide plate 21 and the second area 21D of the first surface 21A, thereby further reducing the problem of light leakage.

[0137] In some embodiments, the first light shielding layer 24 includes a first light shielding portion 24A and a second light shielding portion 24B.

[0138] The first shading portion 24A covers the second area 21D. In the direction X perpendicular to the first surface 21A, the thickness of the first shading portion 24A ranges from 0.006 mm to 0.03 mm, for example, 0.006 mm, 0.008 mm, 0.01 mm, 0.015 mm, 0.018 mm, 0.02 mm, 0.023 mm, 0.028 mm, and 0.03 mm.

[0139] The second shading portion 24B covers the side surface 21E. In the direction Y perpendicular to the side surface 21E, the thickness of the second shading portion 24B ranges from 0.006 mm to 0.03 mm, for example, 0.006 mm, 0.008 mm, 0.01 mm, 0.015 mm, 0.018 mm, 0.02 mm, 0.023 mm, 0.028 mm, and 0.03 mm.

[0140] It is understandable that the thickness and width of the light shielding portion are designed to achieve a light shielding effect while minimizing the thickness and width, thereby minimizing the thickness of the frame of the display module 10 .

[0141] See also Figure 10 , shows another partial cross-sectional structural schematic diagram of the backlight module 2 according to an embodiment of the present disclosure.

[0142] In some embodiments, the backlight module 2 further includes a second light shielding layer 25 covering the second surface 21B of the light guide plate 21 .

[0143] It should be noted that for a direct-lit backlight, the backlight is provided on the light guide plate 21 as the primary light source. For example, the light guide plate 21 may have multiple light zones arranged in an array, each including at least one Mini-LED. Each light zone can be independently controlled, thereby ensuring that the pixels in the corresponding area of ​​the light zone receive accurate backlight brightness. When a transparent light guide plate 21 is used, to prevent light leakage from the second surface 21B of the light guide plate 21, a second light-shielding layer 25 may be provided on the second surface 21B of the backlight module 2. The preparation of the second light-shielding layer 25 can refer to the preparation of the first light-shielding layer 24 and will not be further described here.

[0144] See also Figure 11 , shows another partial cross-sectional structural schematic diagram of the backlight module 2 according to an embodiment of the present disclosure.

[0145] In some embodiments, the backlight module 2 further includes:

[0146] a reflective sheet 26 , disposed on one side of the second surface 21B of the light guide plate 21 ;

[0147] The adhesive portion 27 is provided between the reflection sheet 26 and the second surface 21B.

[0148] It should be noted that for a direct-lit backlight, the backlight is provided on the light guide plate 21 as the primary light source; for example, the light guide plate 21 may include multiple light zones arranged in an array, each of which includes at least one Mini-LED. A reflective sheet 26 may be provided on the second surface 21B of the light guide plate 21, for example, by bonding the reflective sheet 26 to the second surface 21B. This allows the reflective sheet 26 to reflect light emitted by the multiple Mini-LEDs as it is transmitted to the second surface 21B, thereby improving light utilization.

[0149] It should be noted that for an edge-lit backlight, the backlight is disposed on the side surface 21E of the light guide plate 21 and is used to emit light toward the light guide plate 21. The light guide plate 21 guides the side-incident light to be emitted from the light exit surface of the light guide plate 21. Typically, for an edge-lit backlight, multiple grid points are provided on the second surface 21B, and a reflective sheet 26 is provided on one side of the second surface 21B. As a result, after entering the light guide plate 21, the light emitted by the edge-lit backlight is reflected at positions corresponding to the grid points and the reflective sheet 26, and is emitted from the first surface 21A.

[0150] In some embodiments, the transmittance of the adhesive portion 27 may be greater than 90%, such as 90%, 92%, 94%, 96%, 99%, 100%, etc. For example, the adhesive portion 27 may be a high-transmittance adhesive with low haze, or may be an OCA (Optically Clear Adhesive) optical adhesive. The Young's modulus of the adhesive portion 27 is greater than 270 KPa, thereby reducing the internal stress generated between the adhesive portion 27 and the reflective sheet 26. In the direction perpendicular to the light guide plate 21, the thickness of the adhesive portion 27 is 50 um to 125 um. It is understandable that a thicker thickness of the adhesive portion 27 will result in higher costs and will increase the thickness of the display module 10; a thinner thickness of the adhesive portion 27 will result in weaker adhesion, and the thickness can be adjusted according to actual needs.

[0151] See also Figure 12 , which shows a schematic diagram of a partial cross-sectional structure of the display panel 1 according to an embodiment of the present disclosure.

[0152] In some embodiments, the display panel 1 includes a first polarizer 13, an array substrate 14, a liquid crystal layer, a color filter substrate 15, and a second polarizer 16 stacked in sequence, wherein the first polarizer 13 is close to the optical film layer 22;

[0153] The display panel 1 further includes a third light-shielding layer 17, the third light-shielding layer 17 covering a side surface 21E of the array substrate 14 and a third region on a surface of the array substrate 14 close to the first polarizer 13, wherein an orthographic projection of the first polarizer 13 on the array substrate 14 is located in a region of the array substrate 14 excluding the third region;

[0154] The display panel 1 also includes: a fourth shading layer 18, which covers the side surface 21E of the color filter substrate 15 and a fourth area on a side of the color filter substrate 15 close to the second polarizer 16, wherein the orthographic projection of the second polarizer 16 on the color filter substrate 15 is located in an area of ​​the color filter substrate 15 other than the fourth area.

[0155] It is understood that the array substrate 14 and the color filter substrate 15 can be made of transparent substrates. Therefore, in some cases, the array substrate 14 and the color filter substrate 15 also need to be shielded from light. On this basis, the third light-shielding layer 17 is provided to shield the areas of the array substrate 14 that need light shielding, and the fourth light-shielding layer 18 is provided to shield the areas of the color filter substrate 15 that need light shielding, further reducing light leakage in the display module 10. The preparation of the third light-shielding layer 17 and the fourth light-shielding layer 18 can refer to the preparation of the first light-shielding layer 24 and will not be repeated here.

[0156] See also Figure 13 , shows a schematic diagram of a partial cross-sectional structure of the light guide plate 21 according to an embodiment of the present disclosure;

[0157] See also Figure 14 , shows another partial cross-sectional structural schematic diagram of the light guide plate 21 of the embodiment of the present disclosure.

[0158] In some embodiments, the side surface 21E has a first circumferential angle at a position adjacent to the first surface 21A, and the side surface 21E has a second circumferential angle at a position adjacent to the second surface 21B, and the first circumferential angle and the second circumferential angle respectively include: a rounded corner 26 and / or a chamfer 27.

[0159] For example, the first circumference may include a plurality of first circumferences, and the plurality of first circumferences may include a rounded corner 26 (such as Figure 13 As shown), it may include chamfers 27 (as Figure 14 as shown), and may also include fillets 26 and chamfers 27; similarly, the second circumference may include multiple, and among the multiple second circumferences, it may include fillets 26, may include chamfers 27, or may include fillets 26 and chamfers 27.

[0160] It is understood that to improve the strength of the light guide plate 21, the side surface 21E of the light guide plate 21 can be ground to remove any brittle cracks that may occur when the light guide plate 21 is cut. For example, grinding the side surface 21E can form the first and second angles described above. Grinding the first and second angles into fillets 26 or chamfers 27 can make it easier to apply the first and second light-shielding layers 24 and 25 during preparation, for example, to facilitate the application of ink.

[0161] In some embodiments, the radius of the fillet 26 ranges from 0.05 mm to 0.07 mm, for example, 0.05 mm, 0.055 mm, 0.06 mm, 0.064 mm, 0.068 mm, 0.07 mm, etc.

[0162] In some embodiments, in a direction Y perpendicular to the side surface 21E, the width of the orthographic projection of the chamfer 27 on the light guide plate 21 ranges from 0.07 mm to 0.09 mm, for example, 0.07 mm, 0.075 mm, 0.08 mm, 0.086 mm, 0.09 mm, etc. Furthermore, the angle between the surface of the chamfer 27 and the direction perpendicular to the display panel 1 can be 30° to 60°, for example, 30°, 35°, 40°, 55°, 60°, etc.

[0163] It is understandable that the array substrate 14 and / or the color filter substrate 15 of the display panel 1 may also be configured with chamfers 27 or rounded corners 26 to facilitate coating of the third light-shielding layer 17 and the fourth light-shielding layer 18 .

[0164] In some embodiments, in a direction perpendicular to the display panel 1 , the width of the border area 12 ranges from 1.0 mm to 1.4 mm, for example, 1.0 mm, 1.05 mm, 1.1 mm, 1.05 mm, 1.2 mm, 1.25 mm, 1.3 mm, 1.35 mm, 1.4 mm, etc.

[0165] It is understandable that, since the plastic frame and the middle frame are removed, the overall frame width of the display module 10 is smaller, thereby achieving a narrow frame of the display module 10 .

[0166] In some embodiments, in a direction perpendicular to the display panel 1 , the thickness of the display module 10 ranges from 0.9 mm to 3.0 mm, for example, 0.9 mm, 1.0 mm, 1.05 mm, 1.06 mm, 1.08 mm, 1.5 mm, 1.8 mm, 2.0 mm, 2.5 mm, 3 mm, etc.

[0167] It is understandable that since the middle frame, border and back plate are removed, the thickness of the entire display module 10 is smaller. For example, for an LCD display module 10, the thickness can be smaller than that of a traditional LCD display module 10, thereby achieving ultra-thin LCD display module 10.

[0168] See also Figure 15 , which shows a structural block diagram of a display device according to an embodiment of the present disclosure.

[0169] A second aspect of the embodiments of the present disclosure provides a display device 200 , comprising the display module 10 as described in any one of the first aspects.

[0170] The display device 200 may be a product having an image (including a static image or a dynamic image, wherein the dynamic image may be a video) display function. The display device may be, for example, a virtual reality (VR) display device, an augmented reality (AR) display device, a monitor, a mobile phone (Mobile Phone), a tablet computer (Pad), a laptop computer, a television, a personal digital assistant (Personal Digital Assistant, PDA), an ultra-mobile personal computer (Ultra-Mobile Personal Computer, MMPC), a netbook, a wearable device (such as a smart watch), or an in-vehicle display device, etc. This embodiment does not limit the type of display device.

[0171] Based on the above disclosure, the display device 200 of the embodiment of the present disclosure includes a display module 10, including a display panel, a backlight module and an adhesive layer. The display panel includes a display area and a frame area arranged around the display area. The backlight module includes a light guide plate and an optical film layer, the light guide plate has a first surface and a second surface arranged relatively to each other, the first surface is closer to the display panel than the second surface, the first surface includes a first area and a second area arranged around the first area, the optical film layer is arranged between the display panel and the first surface, and the orthographic projection of the optical film layer on the first surface is located in the first area. The adhesive layer is arranged between the display panel and the first surface, the orthographic projection of the adhesive layer on the display panel is located in the frame area, and the orthographic projection of the adhesive layer on the first surface is located in the second area. Therefore, the embodiment of the present disclosure utilizes the adhesive layer to realize the integration of the display panel and the backlight module, removes the middle frame structure (or glue frame structure) in the traditional display module, thereby realizing the lightness and thinness and narrow frame of the display module.

[0172] While the above description does not provide detailed technical details regarding the patterning of each layer, those skilled in the art will appreciate that various technical means can be employed to form layers, regions, and the like in desired shapes. While each embodiment has been described separately, this does not mean that the measures described in each embodiment cannot be advantageously combined.

[0173] In addition, it should be understood by those skilled in the art that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present disclosure is limited to these examples. Within the context of the present disclosure, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present disclosure as described above, which are not provided in detail for the sake of simplicity.

[0174] Although the preferred embodiments of the present disclosure have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present disclosure.

Claims

1. A display module, characterized in that: include: The display panel comprises a display area and a frame area arranged around the display area; A backlight module, comprising a light guide plate and an optical film layer, wherein the light guide plate has a first surface and a second surface disposed opposite to each other, the first surface being closer to the display panel than the second surface, the first surface comprising a first region and a second region disposed around the first region, the optical film layer being disposed between the display panel and the first surface, and an orthographic projection of the optical film layer on the first surface being located in the first region; An adhesive layer is provided between the display panel and the first surface, wherein the orthographic projection of the adhesive layer on the display panel is located in the frame area, and the orthographic projection of the adhesive layer on the first surface is located in the second area.

2. The display module according to claim 1, wherein: The display panel includes a first polarizer, an array substrate, a liquid crystal layer, a color filter substrate, and a second polarizer stacked in sequence, wherein the first polarizer is close to the optical film layer; The adhesive layer is provided between the array substrate and the first surface, and an orthographic projection of the adhesive layer on the array substrate and an orthographic projection of the first polarizer on the array substrate do not overlap with each other; and / or There is an air gap between the first polarizer and the optical film layer. In a direction perpendicular to the display panel, the thickness of the adhesive layer is equal to the sum of the thicknesses of the first polarizer, the air gap and the optical film layer.

3. The display module according to claim 1, wherein: The orthographic projection of the adhesive layer on the display panel is a first annular orthographic projection, the first annular orthographic projection surrounds the display area, and the first annular orthographic projection and the display area do not overlap with each other.

4. The display module according to claim 1, wherein: The optical density of the adhesive layer is greater than or equal to 2; and / or In the first direction, the thickness of the adhesive layer ranges from 0.05 mm to 0.5 mm, and the first direction is perpendicular to the display panel. In the second direction, the width of the adhesive layer ranges from 0.3 mm to 2 mm, and the second direction is perpendicular to the first direction.

5. The display module according to claim 1, wherein: The orthographic projection of the light guide plate on the display panel is located within the display panel, and the orthographic projection of the light guide plate on the display panel covers the display area.

6. The display module according to claim 1, wherein: The light guide plate comprises a rigid light guide plate, and the rigid light guide plate comprises a glass light guide plate.

7. The display module according to any one of claims 1 to 6, characterized in that: The light guide plate further includes: a side surface adjacent to the first surface and the second surface; The backlight module further includes a first light shielding layer covering the second area and the side surface.

8. The display module according to claim 7, wherein: The first light-shielding layer includes: A first light shielding portion covers the second area, and an orthographic projection of the first light shielding portion on the display panel is located in the frame area and has a gap with the display area, and the gap is greater than or equal to 0.5 mm.

9. The display module according to claim 7, wherein: The first light-shielding layer includes: A first shading portion covers the second area, the orthographic projection of the first shading portion on the first surface is a second annular orthographic projection, and the inner edge of the second annular orthographic projection overlaps with the edge of the orthographic projection of the optical film layer on the first surface.

10. The display module according to claim 7, wherein: The first light-shielding layer includes: a first light shielding portion, covering the second area; a second light shielding portion covering the side surface, wherein the second light shielding portion and the first light shielding portion are connected at a position where the side surface is adjacent to the first surface; In a direction perpendicular to the first surface, the thickness of the first shading portion ranges from 0.006 mm to 0.03 mm, and in a direction perpendicular to the side surface, the thickness of the second shading portion ranges from 0.006 mm to 0.03 mm.

11. The display module according to any one of claims 8 to 10, characterized in that: The backlight module further includes: a second light shielding layer covering the second surface of the light guide plate; and / or The backlight module further includes: a reflective sheet, disposed on one side of the second surface of the light guide plate; The bonding portion is arranged between the reflective sheet and the second surface.

12. The display module according to any one of claims 8 to 10, characterized in that: The side surface has a first circumferential angle at a position adjacent to the first surface, and has a second circumferential angle at a position adjacent to the second surface. The first circumferential angle and the second circumferential angle respectively include: a rounded corner and / or a chamfered corner.

13. The display module according to any one of claims 1-6, or any one of claims 8-10, characterized in that: In a direction perpendicular to the display panel, the width of the border area ranges from 1.0 mm to 1.4 mm; and / or In a direction perpendicular to the display panel, the thickness of the display module ranges from 0.9 mm to 3.0 mm.

14. A display device, characterized in that: Comprising the display module according to any one of claims 1-13.

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