Display module and display device

Abstract

The present application relates to a display module and a display device, wherein the display module includes a display panel, a cover plate, and a backlight module, wherein the cover plate is arranged on the light-emitting side of the display panel; the backlight module is arranged on the side of the display panel away from the cover plate; wherein the edge of the backlight module is fixedly connected to the cover plate, and the backlight module and the cover plate are spaced apart to form a cavity; the display panel is arranged in the cavity, one side of the display panel is fixedly connected to the cover plate, and the other side of the display panel is separated from the backlight module. The display module and display device provided by the present application prevent the display panel and the backlight module from directly contacting each other, so there is no stress transfer between the two, which reduces the compressive stress on the display panel and the risk of separation between the display panel and the frame glue, while also reducing the tensile stress on the backlight module and the risk of light failure.

Description

Technical Field

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

[0002] Currently, the mainstream technical solution for flexible foldable screens is organic light emitting diode (OLED) display technology. However, the disadvantage of OLED foldable screens is their high cost, and liquid crystal displays (LCDs) have not had a good solution for flexible displays due to the thick backlight module. With the gradual maturity of mini-LED (mini-LED) technology, the thickness of the backlight module has been reduced, making it easier to achieve flexible bending. This provides a better solution for flexible LCD modules, making flexible LCDs have huge development potential in application scenarios such as wearable devices, computers, vehicles, and smart homes.

[0003] Currently, flexible LCD display technology mainly adopts direct backlight display technology, which replaces the rigid material (such as glass) in the display module with flexible materials that are easy to bend, such as polyimide (PI), polyethylene terephthalate (PET) or flexible glass, to achieve the foldability of the display module. Figure 1 As shown, the existing flexible LCD module structure generally includes a display panel 100, a cover plate 200, and a backlight module 300, wherein the display panel 100 includes an upper polarizer 110', a color filter substrate 120', a liquid crystal layer 130, an array substrate 140', a lower polarizer 150' and a sealant 160; the lower polarizer 150' of the display panel 100 is fully bonded to the light-emitting surface of the backlight module 300 through a transparent adhesive layer 400, wherein the backlight module 300 includes a color conversion layer 330, a sealing layer 312, an LED light board 311 and a backboard 320, etc. In the existing display module structure, since the backlight module 300 is relatively thick and the display panel 100 is located in the upper layer, when the display module as a whole is folded inward 180°, the color filter substrate 120' and the array substrate 140' of the display panel 100 are subjected to relatively large compressive stress. After multiple bendings, the sealant 160 between the color filter substrate 120' and the array substrate 140' is prone to peeling, causing leakage of the liquid crystal layer 130; at the same time, the LED light board 311 of the backlight module 300 is subjected to relatively large tensile stress due to its lower position in the display module stacking structure, and there is a risk of the light board circuit being broken and damaged, and the LED light being extinguished. Summary of the Invention

[0004] The embodiments of the present application provide a display module and a display device, which can effectively reduce the compressive stress on the display panel and the risk of separation between the display panel and the sealant, while also reducing the tensile stress on the backlight module and the risk of light failure.

[0005] To achieve the above objectives, according to a first aspect of the present application, a display module is provided, comprising:

[0006] Display panel;

[0007] a cover plate, disposed on the light-emitting side of the display panel; and

[0008] a backlight module, disposed on a side of the display panel away from the cover plate and connected to the cover plate;

[0009] The edge of the backlight module is fixedly connected to the cover plate, and the backlight module and the cover plate are spaced apart to form a cavity;

[0010] The display panel is disposed in the cavity, one side of the display panel is fixedly connected to the cover plate, and the other side of the display panel is separated from the backlight module.

[0011] In some embodiments, the display module has a display area and a non-display area located on at least one side of the display area;

[0012] The display module further includes a sealant, which is disposed on at least one side of the display panel and located in the non-display area. The sealant adheres the backlight module and the cover plate.

[0013] In some embodiments, the sealant is disposed between the cover plate and the backlight module, and a thickness of the sealant is greater than a thickness of the display panel.

[0014] In some embodiments, there is a first distance between the display panel and the backlight module, and the first distance ranges from 5 μm to 100 μm.

[0015] In some embodiments, an end portion of the display panel is spaced apart from the sealant.

[0016] In some embodiments, there is a second distance between the end of the display panel and the sealant, and the second distance is less than or equal to 1 mm.

[0017] In some embodiments, the display panel includes a pair of non-bending edges and a pair of bendable edges, and the bendable edges are located between the non-bending edges;

[0018] The non-bending edge is retracted 1mm to 3mm relative to the edge of the cover plate;

[0019] Alternatively, both the non-bending edge and the bendable edge are retracted by 1 mm to 3 mm relative to the edge of the cover plate.

[0020] In some embodiments, the edge of the display panel is retracted by 1 mm to 3 mm relative to the edge of the backlight module.

[0021] In some embodiments, the display panel includes:

[0022] A first polarizer is provided on a side of the cover plate close to the backlight module;

[0023] a first substrate, disposed on a side of the first polarizer away from the cover plate;

[0024] a second substrate, disposed on a side of the first substrate away from the first polarizer;

[0025] a liquid crystal layer, disposed between the first substrate and the second substrate;

[0026] a second polarizer, disposed on a side of the second substrate away from the first substrate;

[0027] The backlight module includes:

[0028] a light source assembly, disposed on a side of the display panel away from the cover plate;

[0029] The back plate is arranged on a side of the light source assembly away from the display panel.

[0030] According to a second aspect of the present application, a display device is provided, comprising the display module as described in the first aspect.

[0031] In the display module and display device provided in the embodiments of the present application, the backlight module and the cover plate are spaced apart to form a cavity therebetween. The display panel is located in the cavity, and one side of the display panel is fixedly connected to the cover plate, and the other side of the display panel is separated from the backlight module so that the display panel and the backlight module are not in direct contact. Therefore, there is no stress transfer between the display panel and the backlight module, so that two stress-neutral layers are generated in the entire display module structure, that is, a stress-neutral layer on the display panel side and a stress-neutral layer on the backlight module side, thereby reducing the compressive stress on the display panel and the risk of peeling off between the display panel and the sealant, while also reducing the tensile stress on the backlight module and the risk of light going out.

[0032] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] To more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0034] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings, wherein the same drawing numbers represent the same parts in the following description.

[0035] Figure 1 This is a schematic diagram of the cross-sectional structure of a display module provided by the prior art;

[0036] Figure 2 is a schematic cross-sectional structural diagram of a display module provided in an embodiment of the present application;

[0037] Figure 3 Schematic diagram of a display module in flattened and folded states provided by an embodiment of the present application;

[0038] Figure 4 This is a top view of a cover plate and a display panel of a display module provided in an embodiment of the present application;

[0039] Figure 5 1 is a top view of a cover plate and a display panel of another display module provided in an embodiment of the present application;

[0040] Figure 6 This is a top view of a backlight module and a display panel of a display module provided in an embodiment of the present application;

[0041] Figure 7 is a top view of a back plate of a display module provided in an embodiment of the present application;

[0042] Figure 8 is a stress curve diagram of the display module of the embodiment and comparative example of the present application;

[0043] Figure 9 It is a schematic cross-sectional structural diagram of a display device provided in an embodiment of the present application.

[0044] Description of reference numerals:

[0045] 10. Display module; 20. Frame; 100. Display panel; 101. Light-emitting side; 1001. Display side; 102. Non-bending edge; 1021. First side; 1022. Second side; 103. Bendable edge; 1031. Third side; 1032. Fourth side; 110. First polarizer; 120. First substrate; 130. Liquid crystal layer; 140. Second substrate; 150. Second polarizer; 160. Sealant; 200. Cover; 201. First extension; 300. Backlight module; 301. Second extension; 310. Light source assembly; 311. LED light board; 3111. LED; 3112. Flexible substrate; 312, sealing layer; 313, supporting layer; 320, backplane; 321, bending portion; 322, non-bending portion; 323, stress release structure; 330, color conversion layer; 341, second adhesive layer; 342, third adhesive layer; 343, fourth adhesive layer; 400, transparent adhesive layer; 410, frame glue; 420, first adhesive layer; 500, cavity; 510, first air gap; 520, second air gap; 110', upper polarizer; 120', color filter substrate; 140', array substrate; 150', lower polarizer; AA, display area; NA, non-display area; CC, bending area; NC, non-bending area. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0047] See also Figure 2 , Figure 2 This is a schematic cross-sectional structural diagram of a display module 10 provided in an embodiment of the present application.

[0048] The present application provides a display module 10, which includes a display panel 100, a cover plate 200 and a backlight module 300. The cover plate 200 is arranged on the light-emitting side 101 of the display panel 100; the backlight module 300 is arranged on the side of the display panel 100 away from the cover plate 200; wherein, the edge of the backlight module 300 is fixedly connected to the cover plate 200, and the backlight module 300 and the cover plate 200 are spaced apart to form a cavity 500; the display panel 100 is arranged in the cavity 500, one side of the display panel 100 is fixedly connected to the cover plate 200, and the other opposite side of the display panel 100 is separated from the backlight module 300.

[0049] The display panel 100 is a flexible display panel 100 having bendable or foldable properties, such as a flexible LCD, but not limited thereto.

[0050] When the display panel 100 is a flexible LCD, its structure may include a first polarizer 110, a first substrate 120, a liquid crystal layer 130, a second substrate 140, a second polarizer 150 and a sealant 160 stacked in sequence. The first polarizer 110 is arranged on the side of the cover plate 200 close to the backlight module 300, and the thickness of the first polarizer 110 may range from 10μm to 80μm; the first substrate 120 is arranged on the side of the first polarizer 110 away from the cover plate 200, and the first substrate 120 may be a color filter substrate, including a first substrate and a color filter layer located on the side of the first substrate close to the second substrate 140. The first substrate is a transparent flexible material, such as polyimide (PI), polyethylene terephthalate (PET) or flexible glass, and the thickness of the first substrate may range from 5μm to 15μm; the second substrate 140 is arranged on the side of the first substrate 120 away from the first polarizer 110, and the second substrate 140 may be an array substrate, including The second substrate 120 includes a second substrate and an array circuit layer located on the side of the second substrate close to the first substrate 120. The second substrate is a transparent flexible material, such as polyimide (PI), polyethylene terephthalate (PET) or flexible glass. The thickness of the second substrate can range from 5μm to 15μm. The liquid crystal layer 130 is arranged between the first substrate 120 and the second substrate 140. The sealant 160 is arranged between the first substrate 120 and the second substrate 140 and is arranged around the liquid crystal layer 130 to seal the liquid crystal between the first substrate 120 and the second substrate 140. The second polarizer 150 is arranged on the side of the second substrate 140 away from the first substrate 120. The thickness of the second polarizer 150 can range from 10μm to 80μm.

[0051] The cover plate 200 covers the light-emitting side 101 of the display panel 100 and is used to protect the display panel 100 to prevent damage to the display panel 100. In the present application, the lower surface of the cover plate 200 (the side surface close to the display panel 100) is entirely bonded to the light-emitting surface of the display panel 100. For example, the cover plate 200 can be entirely bonded to the display panel 100 through the first adhesive layer 420, so that the display panel 100 is fixed on the cover plate 200, and the display panel 100 and the backlight module 300 are separated and not in direct contact. Therefore, the cover plate 200 also provides the main support for the display panel 100. The material of the cover plate 200 is a transparent flexible material so that the light emitted by the display panel 100 can pass through and can be bent or folded, such as a 180° bend. The material of the cover plate 200 can be polyimide (PI), polyethylene terephthalate (PET) or flexible glass, etc., but is not limited thereto. The thickness of the cover plate 200 may range from 10 μm to 120 μm, which can meet the support function of the cover plate 200 without affecting the transmittance of the display module 10. The thickness of the first adhesive layer 420 may range from 5 μm to 50 μm.

[0052] The backlight module 300 is used to provide a light source for the display module 10, and includes a light source assembly 310 and a back panel 320. The backlight module 300 can be a direct-type backlight module or an edge-type backlight module. Taking the direct-type backlight module as an example, its light source assembly 310 is arranged between the display panel 100 and the back panel 320, and includes a supporting layer 313, an LED light board 311 and a sealing layer 312. The supporting layer 313 is located on the side of the back panel 320 close to the display panel 100, and is used to support the LED light board 311. The material of the supporting layer 313 is a flexible material, such as PET, and the thickness of the supporting layer 313 can range from 20μm to 100μm. The LED light board 311 includes a flexible substrate 3112 and LED 3111. The flexible substrate 3112 is located on the side of the support layer 313 away from the back panel 320. The material of the flexible substrate 3112 is a flexible material, such as polyimide (PI), polyethylene terephthalate (PET) or flexible glass. The thickness of the flexible substrate 3112 can range from 5μm to 15μm. The LED 3111 is located on the side of the flexible substrate 3112 away from the support layer 313. The LED 3111 can be a Mini-LED or Micro-LED, but is not limited to this. The sealing layer 312 is located on the side of the LED light board 311 away from the support layer 313. It can cover the entire LED light board 311 or cover the LED 3111 with glue. The thickness of the sealing layer 312 can range from 50μm to 200μm. The back panel 320 is arranged on the side of the light source assembly 310 away from the display panel 100, and is used to provide support and protection for the entire display module 10. The material of the back panel 320 can be metal, and the thickness of the back panel 320 can range from 50μm to 150μm. Furthermore, the backlight module 300 can also include a color conversion layer 330, which is located between the light source assembly 310 and the display panel 100. For example, the color conversion layer 330 can convert blue light LEDs into white light, and the thickness of the color conversion layer 330 can range from 10μm to 100μm. A second adhesive layer 341 can also be included between the color conversion layer 330 and the light source assembly 310 to bond the color conversion layer 330 to the light source assembly 310. A third adhesive layer 342 can also be included between the LED light board 311 and the support layer 313 to bond the LED light board 311 to the support layer 313. A fourth adhesive layer 343 may be further included between the back plate 320 and the light source assembly 310 to bond the back plate 320 and the light source assembly 310 together.

[0053] In the present application, the backlight module 300 and the cover plate 200 are connected at the edges to be fixed, and the backlight module 300 and the cover plate 200 are spaced apart so that a cavity 500 is formed between the backlight module 300 and the cover plate 200. The display panel 100 is accommodated in the cavity 500, and the side of the display panel 100 close to the cover plate 200 is fixedly connected to the cover plate 200, and the side of the display panel 100 close to the backlight module 300 is separated from the backlight module 300, that is, there is no direct contact between the display panel 100 and the backlight module 300. Figure 2 As shown, a certain distance is provided between the light-emitting surface of the backlight module 300 and the back surface of the display panel 100, and a first air gap 510 is formed between the two. Since the backlight module 300 and the display panel 100 are not in contact with each other, the continuity of the strain of the backlight module 300 and the display panel 100 is cut off. During the bending process, there is no stress transfer between the backlight module 300 and the display panel 100, and the entire display module 10 generates two stress-neutral layers, that is, there is a stress-neutral layer on the display panel 100 side and a stress-neutral layer on the backlight module 300 side. The stress-neutral layer on the display panel 100 side is transferred to the array substrate or close to the array substrate, reducing the compressive stress on the array substrate and the color filter substrate, thereby reducing the risk of peeling off the array substrate and the frame glue 410. The stress-neutral layer on the backlight module 300 side is transferred to the LED light board 311 or close to the LED light board 311, reducing the tensile stress on the LED light board 311, thereby reducing the risk of LED light failure. Therefore, the display module 10 structure of the present application can effectively improve the reliability of the flexible display module and increase the folding life of the display module.

[0054] In some embodiments, see Figure 2 There is a first distance a between the display panel 100 and the backlight module 300, namely, the distance between the light-emitting surface of the backlight module 300 and the back surface of the display panel 100. The first distance a ranges from 5μm to 100μm. If the first distance is too small, it is impossible to reduce the compressive stress on the display panel 100 and the tensile stress on the backlight module 300, thereby failing to improve the problem of separation between the display panel 100 and the sealant 160 and the problem of light failure. If the first distance is too large, the difference in bending radius between the display panel 100 and the backlight module 300 increases, which in turn increases the compressive stress on the display panel 100 and increases the risk of separation between the color filter substrate and the array substrate.

[0055] In this application, please see Figure 2 The display module 10 has a display area AA and a non-display area NA located on at least one side of the display area AA. The display area AA corresponds to the area of ​​the display panel 100 that displays the image and is used to display the picture. The non-display area NA can be located on opposite sides of the display area AA or arranged around the display area AA.

[0056] In some embodiments, see Figure 2 The display module 10 also includes a frame glue 410, which is arranged on at least one side of the display panel 100 and is located in the non-display area NA. The frame glue 410 is used to bond the backlight module 300 and the cover plate 200 to connect and fix the backlight module 300 to the cover plate 200. The frame glue 410 can be a single glue material, or it can be composed of multiple layers of glue and other functional materials, which is not limited here. The material of the frame glue 410 can be a high-elasticity glue material with a soft texture and large strain, such as a high-elasticity tape or glue, to improve the bending performance and folding life of the display module 10. The elastic modulus of the frame glue 410 can be less than 0.03MPa, and has high elasticity.

[0057] In some embodiments, see Figure 2 , a sealant 410 may be disposed between the cover plate 200 and the backlight module 300, and the thickness of the sealant 410 may be greater than the thickness of the display panel 100. For example, the thickness of the sealant 410 may be equal to the sum of the thickness of the display panel 100 and the first distance. For another example, when a first adhesive layer 420 is further provided between the display panel 100 and the cover plate, the thickness of the sealant 410 may be equal to the sum of the thickness of the first adhesive layer 420, the thickness of the display panel 100, and the first distance.

[0058] In some embodiments, the sealant 410 may also be disposed on the side surfaces of the cover plate 200 and the display module 10 , and the thickness of the sealant 410 is greater than the sum of the thickness of the display panel 100 and the first distance.

[0059] In this application, the display module 10 may be a foldable module that can be folded inwards by 180°. Figure 3 The display module 10 can be bent 180° from a horizontal state to form a U-shaped folded state, wherein the inner side of the U-shaped folded state of the display module 10 can be the display side 1001.

[0060] In some embodiments, please refer to Figure 4 and Figure 5 The display panel 100 includes a pair of non-bending edges 102 and a pair of bendable edges 103, with the bendable edge 103 located between the non-bending edges 102. Specifically, the display panel 100 includes a first side 1021 and a second side 1022, as well as a third side 1031 and a fourth side 1032. The third side 1031 and the fourth side 1032 are located between the first side 1021 and the second side 1022. The first side 1021, the second side 1022, the third side 1031, and the fourth side 1032 are connected end to end to form a rectangle. The first side 1021 and the second side 1022 are non-bending edges 102, and the third side 1031 and the fourth side 1032 are bendable edges 103, which can be bent 180 degrees.

[0061] In some embodiments, please refer to Figure 4 The non-bending edge 102 can be retracted relative to the edge of the cover plate 200, that is, the edge of the cover plate 200 extends beyond the edge of the display panel 100, and the portion of the cover plate 200 extending beyond the edge of the display panel 100 is defined as the first extension portion 201. Figure 4 The display panel 100 includes two opposing and parallel first extensions 201. The first extensions 201 can be used to set sealant 410. For example, the sealant 410 can be attached to the side of the first extension 201 near the backlight module 300 to form two parallel sealants 410 for bonding to the backlight module 300. The non-bending edge 102 can be retracted relative to the edge of the cover plate 200 by a width ranging from 1 mm to 3 mm.

[0062] In some embodiments, please refer to Figure 5 Both the non-bending edge 102 and the bendable edge 103 can be retracted relative to the edge of the cover plate 200. The first extension 201 is annular and surrounds the display panel 100. A sealant 410 is attached to the side of the first extension 201 near the backlight module 300 to form a ring-shaped sealant 410. The sealant 410 surrounds the display panel 100. The width of the retracted non-bending edge 102 and the bendable edge 103 relative to the edge of the cover plate 200 ranges from 1 mm to 3 mm.

[0063] In some embodiments, please refer to Figure 6 The edge of the display panel 100 is retracted relative to the edge of the backlight module 300, that is, the edge of the backlight module 300 extends beyond the edge of the display panel 100. The portion of the backlight module 300 extending beyond the edge of the display panel 100 is defined as the second extension portion 301. The second extension portion 301 can be used to bond the sealant 410. That is, the sealant 410 can be sandwiched between the first extension portion 201 and the second extension portion 301. The backlight module 300 is bonded to the cover plate 200 via the sealant 410. The width of the edge of the display panel 100 that is retracted relative to the edge of the backlight module 300 ranges from 1 mm to 3 mm.

[0064] In the present application, when the width of the edge of the display panel 100 is retracted relative to the edges of the cover plate 200 and the backlight module 300 within a range of 1mm to 3mm, it can reserve enough width for pasting the frame glue 410 without excessively increasing the size of the frame of the display module 10.

[0065] In some embodiments, please refer to Figure 2 and Figure 6When the frame glue 410 is located between the cover plate 200 and the backlight module 300, glue or double-sided tape can be applied to the light-emitting side of the backlight module 300, that is, the surface of the second extension portion 301 close to the display panel 100, and bonded to the surface of the first extension portion 201 of the cover plate 200 close to the display panel 100 in the form of a frame, so that the backlight module 300 and the cover plate 200 are bonded. The width of the frame glue 410 ranges from 1 mm to 2 mm, and the thickness ranges from 0.15 mm to 0.25 mm. The thickness of the frame glue 410 is greater than the thickness of the display panel 100. Therefore, after the backlight module 300 and the cover plate 200 are bonded, a first air gap 510 is formed between the backlight module 300 and the display panel 100.

[0066] In some embodiments, the end of the display panel 100 is spaced apart from the sealant 410 and the two are not in direct contact. Figure 2 There is a certain distance between the side of the frame glue 410 and the side of the display panel 100, that is, there is a second air gap 520 between the frame glue 410 and the display panel 100, and there is no contact between the frame glue 410 and the display panel 100, which reduces the stress influence of the frame glue 410 on the display panel 100 during the bending process and is more convenient for processing.

[0067] In some embodiments, please refer to Figure 2 , a second distance b is defined between the end of the display panel 100 and the sealant 410, and the second distance b is less than or equal to 1 mm. When the second distance is 0, the side of the sealant 410 contacts the side of the display panel 100. When the second distance is greater than 0 and less than 1 mm, the side of the sealant 410 does not contact the side of the display panel 100, thereby reducing the stress effect of the sealant 410 on the display panel 100 during the bending process. Furthermore, the frame size is not affected by the excessive distance between the display panel 100 and the sealant 410.

[0068] In some embodiments, please refer to Figure 7 The display module 10 includes a bending area CC and non-bending areas NC located on opposite sides of the bending area CC. The back panel 320 includes a bending portion 321 corresponding to the bending area CC and a non-bending portion 322 corresponding to the non-bending area NC. The bending portion 321 is provided with a stress release structure 323 to improve the bending performance of the back panel 320 and increase the bending life of the display module 10. The stress release structure 323 can be a hollow pattern provided on the bending portion 321, and the hollow pattern can be a regular or irregular pattern, such as a serpentine, a circle, a rectangle, etc. The material of the back panel 320 can be a metal, such as stainless steel SUS, aluminum alloy, etc., but is not limited thereto.

[0069] The display module of the present application is further described below through specific embodiments and mechanical simulation data of the display module.

[0070] 1. Display module structure

[0071] Example

[0072] Please refer to Figure 2 The display module includes a display panel 100, a cover plate 200, a backlight module 300, and a sealant 410. The cover plate 200 is arranged on the light-emitting side 101 of the display panel 100; the backlight module 300 is arranged on the side of the display panel 100 away from the cover plate 200; the sealant 410 is arranged between the cover plate 200 and the backlight module 300 to bond the backlight module 300 and the cover plate 200, and the sealant 410 is arranged around the display panel 100; wherein the backlight module 300 and the cover plate 200 are spaced apart to form a cavity 500, and the display panel 100 is arranged in the cavity 50 0, the light-emitting surface of the display panel 100 is connected to the cover plate 200 through the first adhesive layer 420, the back and side surfaces of the display panel 100 are separated from the backlight module 300 and the sealant 410, respectively, and a first distance a is defined between the display panel 100 and the backlight module 300, the first distance a being in the range of 5 μm to 100 μm, and a second distance b is defined between the end of the display panel 100 and the sealant 410 being less than or equal to 1 mm.

[0073] The display panel 100 includes a first polarizer 110, a first substrate 120, a liquid crystal layer 130, a second substrate 140, a second polarizer 150, and a sealant 160, which are stacked in sequence. The first polarizer 110 is disposed on the side of the cover plate 200 close to the backlight module 300; the first substrate 120 is disposed on the side of the first polarizer 110 away from the cover plate 200. The first substrate 120 may be a color filter substrate; the second substrate 140 is disposed on the side of the first substrate 120 away from the first polarizer 110. The second substrate 140 may be an array substrate; the liquid crystal layer 130 is disposed between the first substrate 120 and the second substrate 140; the sealant 160 is disposed between the first substrate 120 and the second substrate 140 and surrounds the liquid crystal layer 130; and the second polarizer 150 is disposed on the side of the second substrate 140 away from the first substrate 120.

[0074] The backlight module 300 includes a light source assembly 310, a backplane 320, and a color conversion layer 330. The light source assembly 310 is disposed between the display panel 100 and the backplane 320 and includes a support layer 313, an LED light board 311, and a sealing layer 312. The support layer 313 is located on the side of the backplane 320 closest to the display panel 100. The LED light board 311 includes a flexible substrate 3112 and LEDs 3111. The flexible substrate 3112 is located on the side of the support layer 313 away from the backplane 320, and the LEDs 3111 are located on the side of the flexible substrate 3112 away from the support layer 313. The sealing layer 312 is located on the side of the LED light board 311 away from the support layer 313 and covers the entire LED light board 311. The backplane 320 is disposed on the side of the light source assembly 310 away from the display panel 100. The color conversion layer 330 is located between the light source assembly 310 and the display panel 100. A second adhesive layer 341 is further included between the color conversion layer 330 and the light source assembly 310 , a third adhesive layer 342 is further included between the LED light board 311 and the support layer 313 , and a fourth adhesive layer 343 is further included between the back panel 320 and the light source assembly 310 .

[0075] Comparative Example

[0076] Please refer to Figure 1 The structure of the display module in the comparative example is similar to that of the display module in the above embodiment. The only difference is that the display panel 100 and the backlight module 300 in the comparative example are fully bonded with an adhesive layer 400, and there is no gap between the display panel 100 and the backlight module 300. The remaining identical structures are not repeated here.

[0077] 2. Simulation test results:

[0078] Mechanical simulations were performed on the display modules of the embodiment and the comparative example. For the simulation results, please refer to Figure 8 . The ordinate represents tensile stress, the abscissa represents the position in the thickness direction of the display module, the solid line represents the stress change of the display module of the embodiment of the present application, the dotted line represents the stress change of the display module of the comparative example, 1 represents the stress of the LED light board, and 2 represents the stress of the array substrate layer.

[0079] Depend on Figure 8It can be seen that in the display module structure of the comparative example, the display panel 100 and the backlight module 300 are fully bonded, the compressive stress of the array substrate is -19MPa, and the tensile stress of the LED light board is 138MPa. In the display module structure of the embodiment, the display panel 100 and the backlight module 300 are spaced apart, the force direction of the array substrate changes from compressive stress to tensile stress of 19MPa, and the tensile stress of the LED light board is reduced to 45MPa, both of which are within the safe stress range of 60MPa. The simulation results show that the display module structure of the present application can greatly reduce the risk of compression peeling of the array substrate and tensile fracture of the LED light board layer, effectively improving the bending life of the display module.

[0080] This application also provides a display device, please refer to Figure 9 , Figure 9 FIG2 is a schematic cross-sectional view of a display device according to an embodiment of the present application. The display device includes a frame 20 and the display module 10 described above. The frame 20 has a receiving cavity, and the display module 10 is disposed within the receiving cavity. The frame 20 is used to support and protect the display module 10. The display device of the present application has all the advantages of the display module 10 described above, and will not be further elaborated here.

[0081] The display device of the present application can be a wearable device, a computer, a car, a smart home and other display products, but is not limited thereto.

[0082] In the display module and display device provided in the embodiments of the present application, the backlight module and the cover plate are spaced apart to form a cavity therebetween. The display panel is located in the cavity, and one side of the display panel is fixedly connected to the cover plate, and the other side of the display panel is separated from the backlight module so that the display panel and the backlight module are not in direct contact. Therefore, there is no stress transfer between the display panel and the backlight module, so that two stress-neutral layers are generated in the entire display module structure, that is, a stress-neutral layer on the display panel side and a stress-neutral layer on the backlight module side, thereby reducing the compressive stress on the display panel and the risk of peeling off between the display panel and the sealant, while also reducing the tensile stress on the backlight module and the risk of light going out.

[0083] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0084] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0085] The embodiments, implementation methods and related technical features of the present application can be combined and replaced with each other without conflict.

[0086] The above are merely preferred embodiments of the present application and do not constitute any form of limitation to the present application. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application are still within the scope of the technical solution of the present application.

Claims

1. A display module, characterized in that: include: Display panel; a cover plate, arranged on the light-emitting side of the display panel; as well as a backlight module, disposed on a side of the display panel away from the cover plate; The edge of the backlight module is fixedly connected to the cover plate, and the backlight module and the cover plate are spaced apart to form a cavity; The display panel is disposed in the cavity, one side of the display panel is fixedly connected to the cover plate, and the other side of the display panel is separated from the backlight module; The display panel includes a pair of non-bending edges and a pair of bendable edges, wherein the bendable edges are located between the non-bending edges; The non-bending edge is set inward relative to the edge of the cover plate; Alternatively, both the non-bending edge and the bendable edge are set inward relative to the edge of the cover plate.

2. The display module according to claim 1, wherein: The display module has a display area and a non-display area located on at least one side of the display area; The display module further includes a sealant, which is disposed on at least one side of the display panel and located in the non-display area. The sealant adheres the backlight module and the cover plate.

3. The display module according to claim 2, wherein: The sealant is arranged between the cover plate and the backlight module, and the thickness of the sealant is greater than the thickness of the display panel.

4. The display module according to claim 3, wherein: There is a first distance between the display panel and the backlight module, and the first distance ranges from 5 μm to 100 μm.

5. The display module according to claim 3, wherein: The end of the display panel is spaced apart from the frame glue.

6. The display module according to claim 5, wherein: There is a second distance between the end of the display panel and the sealant, and the second distance is less than or equal to 1 mm.

7. The display module according to claim 1, wherein: The non-bending edge is retracted by 1 mm to 3 mm relative to the edge of the cover plate; Alternatively, both the non-bending edge and the bendable edge are retracted by 1 mm to 3 mm relative to the edge of the cover plate.

8. The display module according to claim 1, wherein: The edge of the display panel is retracted by 1 mm to 3 mm relative to the edge of the backlight module.

9. The display module according to any one of claims 1 to 8, wherein: The display panel includes: A first polarizer is provided on a side of the cover plate close to the backlight module; a first substrate, disposed on a side of the first polarizer away from the cover plate; a second substrate, disposed on a side of the first substrate away from the first polarizer; a liquid crystal layer, disposed between the first substrate and the second substrate; a second polarizer, disposed on a side of the second substrate away from the first substrate; The backlight module includes: a light source assembly, disposed on a side of the display panel away from the cover plate; The back plate is arranged on a side of the light source assembly away from the display panel.

10. A display device, characterized in that: A display module comprising any one of claims 1-9.

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