Display module and display device

Abstract

The present disclosure relates to the technical field of display, and provides a display module and a display device. The display module comprises: a display panel; a composite material layer, wherein the composite material layer is disposed on a backlight side of the display panel, the composite material layer comprises a thin material region and a thick material region, and the surface of the side of the thick material region facing away from the display panel protrudes toward the backlight side of the display panel relative to the surface of the side of the thin material region facing away from the display panel; and a metal layer, wherein the metal layer is disposed on the side of the thin material region of the composite material layer facing away from the display panel, and the orthographic projection of the metal layer on the display panel overlaps the orthographic projection of the thin material region on the display panel.

Description

A display module and a display device

[0001] This disclosure claims priority to Chinese Patent Application No. 2024111951131, filed on August 28, 2024, entitled “A Display Module and Display Device”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of display technology, and more specifically, to a display module and a display device. Background Technology

[0003] Organic light-emitting diode (OLED) electronic products have advantages such as being all-solid-state, self-emissive, high brightness, high resolution, wide viewing angle, fast response speed, thinness, small size, light weight, the ability to use flexible substrates, low-voltage DC drive, low power consumption, and wide operating temperature range, making them widely used in the market.

[0004] Currently, OLED electronic products can suffer from black spots (partial loss of display) due to foreign objects entering the back film layer of the display module or remaining at the edges during film lamination. Therefore, eliminating black spots in display modules has become an urgent problem to be solved in this field. Summary of the Invention

[0005] This disclosure provides a display module and a display device, aiming to solve the problem of how to eliminate black spots in the display module.

[0006] A first aspect of this disclosure provides a display module, the display module comprising:

[0007] Display panel;

[0008] A composite material layer is disposed on the backlight side of the display panel. The composite material layer includes a thin material area and a thick material area. The surface of the thick material area facing away from the display panel protrudes toward the backlight side of the display panel relative to the surface of the thin material area facing away from the display panel.

[0009] A metal layer is disposed on the side of the thin material area of ​​the composite material layer away from the display panel, and the orthographic projection of the metal layer on the display panel coincides with the orthographic projection of the thin material area on the display panel.

[0010] In one optional embodiment, the thick material region is disposed on at least one of the first side, second side, and third side of the thin material region, wherein the first side, second side, and third side of the thin material region are respectively adjacent to the surface of the thin material region near the display panel, the first side is disposed opposite to the second side, and is located on both sides of the third side;

[0011] The width of the thick material area on the target side along the first direction is less than or equal to the width of the thin material area along the first direction, where the first direction is the direction in which the target side edge of the thin material area extends, and the target side is the first side, the second side, or the third side.

[0012] In one alternative embodiment, the surface of the thick material region facing away from the display panel is flush with the surface of the metal layer facing away from the display panel.

[0013] In one alternative embodiment, the display module further includes a protective layer disposed on the side of the metal layer opposite to the display panel;

[0014] The orthographic projection of the protective layer on the display panel covers the orthographic projection of the metal layer and the thick material area on the display panel.

[0015] In one alternative embodiment, the display module further includes a protective layer disposed on the side of the metal layer opposite to the display panel;

[0016] The orthographic projection of the protective layer on the display panel coincides with the orthographic projection of the thin material area on the display panel.

[0017] In one alternative embodiment, the surface of the thick material region facing away from the display panel is flush with the surface of the protective layer facing away from the display panel.

[0018] In one alternative embodiment, a portion of the thin material area protrudes toward the backlight side of the display panel to form the thick material area;

[0019] The metal layer has an opening corresponding to a local area of ​​the thin material area, the thick material area fills the opening, and the surface of the thick material area away from the display panel is flush with the surface of the metal layer away from the display panel.

[0020] In one alternative implementation, the local region is located at at least one edge of the thin material region, and / or the local region is located inside the thin material region.

[0021] In one alternative embodiment, the orthographic projection shape of the thick material region on the display panel is a polygon, an arc, or other irregular shape.

[0022] In one alternative embodiment, the composite material layer includes a buffer layer and a first adhesive layer, the first adhesive layer being disposed on the side of the buffer layer near the display panel.

[0023] In one alternative embodiment, the buffer layer includes a first sub-layer and a second sub-layer stacked together, the first sub-layer being disposed close to the display panel, and the foaming ratio of the first sub-layer being less than the foaming ratio of the second sub-layer.

[0024] In one alternative embodiment, the portion of the thick material region that protrudes relative to the thin material region is the material of the second sub-layer, and the portion of the thick material region aligned with the thin material region includes the material of the second sub-layer and the material of the first sub-layer.

[0025] In one alternative embodiment, the portion of the thick material region that protrudes relative to the thin material region is the material of the second sub-layer, and the portion of the thick material region that is aligned with the thin material region is the material of the first sub-layer.

[0026] In one alternative embodiment, the first sublayer and the second sublayer have the same thickness along a second direction, which is the direction in which the display panel points toward the composite material layer.

[0027] In one alternative embodiment, the width of the thick material region along the first direction is less than or equal to 10 mm.

[0028] A second aspect of this disclosure provides a display device, the display device including a display module as described in any one of the first aspects of this disclosure. Beneficial effects:

[0029] This disclosure provides a display module and a display device. The display module includes: a display panel; a composite material layer disposed on the backlight side of the display panel, the composite material layer including a thin material area and a thick material area, wherein the surface of the thick material area facing away from the display panel protrudes towards the backlight side of the display panel relative to the surface of the thin material area facing away from the display panel; and a metal layer disposed on the side of the thin material area of ​​the composite material layer facing away from the display panel, wherein the orthographic projection of the metal layer on the display panel coincides with the orthographic projection of the thin material area on the display panel. This disclosure increases the local thickness of the composite material layer by providing a thick material area protruding towards the backlight side relative to the thin material area. The thick material area absorbs the expansion stress of foreign objects and the compressive stress of the entire device, thereby improving the compatibility of the display module with foreign objects, reducing damage to the display panel from foreign objects, and effectively eliminating the black spot phenomenon of the display module.

[0030] The above description is merely an overview of the technical solution disclosed herein. In order to better understand the technical means of this disclosure and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this disclosure more apparent and understandable, specific embodiments of this disclosure are described below. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 is an exploded view of a display module according to an embodiment of the present disclosure;

[0033] Figure 2 is a top view schematic diagram of a composite material layer according to an embodiment of the present disclosure;

[0034] Figure 3 is a schematic diagram of a metal layer surface and a thick material region surface being flush with each other according to an embodiment of the present disclosure.

[0035] Figure 4 is a schematic diagram of a protective layer surface and a thick material area surface being flush with each other according to an embodiment of the present disclosure;

[0036] Figure 5 is a schematic diagram of a thick material area with a release film attached according to an embodiment of the present disclosure;

[0037] Figure 6 is a schematic diagram of a thick material segmentation arrangement according to an embodiment of the present disclosure;

[0038] Figure 7 is a schematic diagram of a local area of ​​a thin material region protruding towards the backlight side to form a thick material region according to an embodiment of the present disclosure;

[0039] Figure 8 is a schematic cross-sectional view of the hierarchical structure of a display module according to an embodiment of the present disclosure;

[0040] Figure 9 is a schematic cross-sectional view of a layered structure of a composite material layer according to an embodiment of the present disclosure;

[0041] Figure 10 is a schematic cross-sectional view of another layered structure of composite material layers proposed in an embodiment of this disclosure.

[0042] Explanation of reference numerals in the attached drawings: 11. Display panel; 12. Back film layer; 13. Composite material layer; 131. Thin material area; 132. Thick material area; 133. First adhesive layer; 134. Second adhesive layer; 135. Buffer layer; 1351. First sub-layer; 1352. Second sub-layer; 136. Release film; 14. Metal layer; 141. Opening; 15. Protective layer. Specific Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0044] It should be understood that when a layer or element is referred to as being on another layer or substrate, it can mean that the layer or element is directly on the other layer or substrate, or that there is an intermediate layer between the layer or element and the other layer or substrate.

[0045] Organic light-emitting diode (OLED) electronic products have advantages such as being all-solid-state, self-emissive, high brightness, high resolution, wide viewing angle, fast response speed, thinness, small size, light weight, the ability to use flexible substrates, low-voltage DC drive, low power consumption, and wide operating temperature range, making them widely used in the market.

[0046] A common display problem in OLED electronic products is black spot phenomenon. Black spot phenomenon refers to a display issue that may occur during use, mainly manifested as black spots on the screen that do not emit light or have significantly reduced brightness. The main cause of black spot phenomenon is the influence of foreign objects in the display module. Specifically, foreign objects may enter the back film layer (such as the protective layer) of the display panel, or the film layer may not be properly cleaned during lamination, leaving foreign objects behind due to edge effects. When these residual foreign objects are exposed to humid and hot conditions, they may expand, or when subjected to external stresses (such as stress generated during drops, vibrations, or pressing), they can damage the display panel, causing wire breakage or moisture corrosion, thus leading to black spot phenomenon (partial non-display on the display panel).

[0047] In view of this, the present disclosure provides a display module. Figure 1 shows an exploded view of a display module according to an embodiment of the present disclosure, and Figure 8 shows a cross-sectional view of the layered structure of a display module according to an embodiment of the present disclosure. As shown in Figures 1 and 8, the display module includes: a display panel 11; a composite material layer 13 disposed on the backlight side of the display panel 11; and a metal layer 14 disposed on the side of the composite material layer 13 away from the display panel 11.

[0048] In this embodiment, the display panel 11 can be a liquid crystal display (LCD), an organic light-emitting diode (OLED) display panel, a quantum dot light-emitting diode (QLED) display panel, etc., and is not specifically limited herein. It should be noted that the display panel 11 includes a light-emitting side and a backlight side. In this embodiment, the light-emitting side refers to the side of the display panel 11 from which light is emitted and faces the user, and the backlight side refers to the side of the display panel 11 opposite to the light-emitting side. All the film layers mentioned in this embodiment are disposed on the backlight side of the display panel 11. Optionally, the thickness of the display panel 11 along the second direction is greater than or equal to 0.02 mm and less than or equal to 0.05 mm. For example, the thickness of the display panel 11 along the second direction is 0.038 mm, where the second direction is the direction from the display panel 11 to the composite material layer 13.

[0049] In this embodiment, the display module further includes a back film layer 12, which is disposed between the composite material layer 13 and the display panel 11. The back film layer 12 provides a stable support structure for the OLED display module, ensuring that the display panel 11 remains flat and stable under various operating conditions. Simultaneously, the back film layer 12 also prevents harmful substances from the external environment from penetrating the interior of the display module, protecting it from external environmental influences such as moisture, dust, and mechanical impact, thereby extending the lifespan of the display panel and reducing display performance degradation or failure caused by physical damage. Optionally, the material of the back film layer 12 may include polyethylene terephthalate (PET), polyimide (PI), polycarbonate (PC), polyethylene naphthalate (PEN), etc.; the thickness of the back film layer 12 along the second direction is greater than or equal to 0.05 mm and less than or equal to 0.1 mm. For example, the thickness of the back film layer 12 along the second direction is 0.088 mm.

[0050] The display module further includes a protective layer 15, which is disposed on the side of the metal layer 14 opposite to the display panel 11. The protective layer 15 is used to quickly conduct the heat generated by the display panel 11 during the light emission process to the heat dissipation system, thereby reducing the operating temperature of the display panel 11 and improving the stability and reliability of the display module. In addition, the protective layer 15 can also protect the display module from adverse effects such as static electricity and electromagnetic interference in the external environment to a certain extent. Optionally, the material of the protective layer 15 can be a surface conductive film (SCF); the thickness of the protective film along the second direction is greater than or equal to 0.03 mm and less than or equal to 0.07 mm. For example, the thickness of the protective film along the second direction is 0.05 mm.

[0051] In this embodiment, the black spot phenomenon in the display module is mainly caused by foreign objects. Foreign objects remaining in the display module can cause deformation due to environmental influences or external stress during assembly, damaging the display panel 11 and resulting in black spots. Specifically, foreign objects may scratch or indent the layered structure of the display panel 11, compromising its integrity and causing a decrease in the luminous performance of local areas. If foreign objects come into contact with the electrodes (anode or cathode) of the display panel, they may damage the integrity of the electrodes or change their shape, affecting the current distribution in the display panel and causing abnormal current density in local areas. For example, if foreign objects cause excessively high current density in a local area of ​​the display panel 11, the organic light-emitting layer in that area may be subjected to excessive electrical stress. Prolonged high current density will accelerate the aging process of the organic light-emitting layer, leading to a decrease in the luminous performance of that area and ultimately forming black spots. Furthermore, if the foreign object is hygroscopic or oxygen-permeable, it may accelerate the permeation of moisture and oxygen into the display panel 11. Moisture and oxygen are important factors in the aging of the display panel 11, and their presence will accelerate the degradation process of the organic light-emitting layer, thereby aggravating the black spot phenomenon in that area. If the foreign object causes the local temperature of the display panel 11 to rise (for example by hindering heat dissipation), it will also accelerate the aging of the display panel 11, thereby aggravating the black spot phenomenon in that area.

[0052] Therefore, in this embodiment of the present disclosure, a thicker composite material layer 13 is provided at the corresponding position of the area where black spots frequently occur on the display panel 11. The thicker composite material layer 13 absorbs the stress of foreign objects on the display panel 11, thereby avoiding the generation of black spots in these areas and effectively improving the display performance of the display module. Specifically, Figure 2 shows a top view of a composite material layer proposed in an embodiment of the present disclosure. As shown in Figures 1 and 2, the composite material layer 13 includes a thin material area 131 and a thick material area 132. The surface of the thick material area 132 near the display panel 11 is flush with the surface of the thin material area 131 near the display panel 11. The surface of the thick material area 132 away from the display panel 11 protrudes towards the backlight side of the display panel 11 relative to the surface of the thin material area 131 away from the display panel 11, so that the thickness of the thick material area 132 along the second direction is greater than the thickness of the thin material area 131 along the second direction.

[0053] In this embodiment, the composite material layer 13 serves two purposes: firstly, it securely connects the layered materials of the display module and fixes the display module to the housing or frame of the display device, helping to maintain the stability of the display module and preventing displacement or detachment during use; secondly, because the display panel 11, due to its unique structure and material, is easily damaged by external impacts or compression, the composite material layer 13 protects the display panel 11, absorbing and dispersing external stress, thus protecting it from damage. Specifically, since the thickness of the thick material region 132 along the second direction is greater than the thickness of the thin material region 131 along the second direction, it has a stronger deformation capacity than the thin material region 131. When a foreign object is present at the location of the thick material region 132 on the display module, the thick material region 132 can deform under the stress caused by the expansion or compression of the foreign object, thereby absorbing the stress and preventing damage to the display panel 11, effectively reducing black spot phenomena. The thin material region 131 has a smaller thickness than the thick material region 132, and therefore has greater hardness than the thick material region 132, thus it can be used to ensure the fixing ability of the composite material layer 13.

[0054] In some optional embodiments, due to the edge effect of the foreign matter, foreign matter often accumulates in the edge area of ​​the display module. The foreign matter effect refers to the special influence that foreign matter (such as dust, particles, bubbles, etc.) has on the light emission, current distribution, and heat conduction of the display module when it is at or near the edge of the display panel 11 or the display module. Therefore, the thick material area 132 can be disposed on the outer edge of the thin material area 131. In this embodiment, the outer edge refers to the side of the thin material area 131 that is adjacent to the surface of the display panel 11 and away from the central area of ​​the thin material area 131. Specifically, the thin material area 131 includes a first side, a second side, a third side, and a fourth side. The first side, second side, third side, and fourth side are respectively adjacent to the surface of the thin material area 131 near the display panel 11. The first side and the second side are arranged opposite each other, and the third side and the fourth side are arranged opposite each other. The fourth side is the side of the display panel 11 used for overlapping. The first side and the second side are disposed on both sides of the third side (and the fourth side). The thick material area 132 is disposed on at least one of the first, second, and third sides of the thin material area 131, and the fourth side is not provided with the thick material area 132, so as to ensure that the composite material layer 13 does not adversely affect the connection of the display panel 11. Specifically, the thick material area 132 can be disposed on any one, any two, or all three sides of the first, second, and third sides of the thin material area 131, where the first and second sides are the left and right sides of the thin material area 131, and the third side is the upper side of the thin material area 131.

[0055] Optionally, to ensure that the thick material area 132 covers the area corresponding to the foreign object on the outer edge of the thin material area 131, the width of the thick material area 132 on the target side along the first direction is less than or equal to the width of the thin material area 131 along the first direction, where the first direction is the direction in which the target side edge of the thin material area 131 extends, and the target side is the first side, the second side, or the third side. For example, the width of the thick material area 132 along the first direction is less than or equal to 10 mm.

[0056] In this embodiment, the metal layer 14 provides mechanical support and stability for the display panel 11, ensuring its structural performance. Simultaneously, it rapidly conducts and dissipates heat generated during the light emission process, improving the durability and performance of the display panel 11. Furthermore, the metal layer 14 can prevent moisture intrusion into the display panel 11 to a certain extent, extending its lifespan. Optionally, the metal layer 14 can be made of copper; the thickness of the metal layer 14 along the second direction is greater than or equal to 0.01 mm and less than or equal to 0.05 mm. For example, the thickness of the metal layer 14 along the second direction is 0.03 mm.

[0057] In some optional embodiments, as shown in FIG1, since the composite material layer 13 includes a thick material region 132 and a thin material region 131 with different thicknesses, in order to reduce the overall thickness of the display module and achieve a thinner display module, in this embodiment of the present disclosure, the orthographic projection of the metal layer 14 on the display panel 11 coincides with the orthographic projection of the thin material region 131 on the display panel 11. This allows the metal layer 14 to be disposed on the side surface of the thin material region 131 of the composite material layer 13 that faces away from the display panel 11. This ensures that the thickness of the display module only increases by the thickness of the protruding portion of the thick material region 132 relative to the thin material region 131, thereby avoiding the metal layer 14 being directly stacked on the side surface of the thicker material region 132 that is farther from the display panel 11, which would further increase the thickness of the display module. It should be noted that the coincidence mentioned in this embodiment of the present disclosure refers to coincidence within the range of process error, rather than precise and complete consistency.

[0058] In some optional embodiments, Figure 3 shows a schematic diagram of a metal layer surface and a thick material region surface being flush, according to an embodiment of this disclosure. As shown in Figure 3, in order to make the metal layer 14 have a flat surface and maximize the support, heat dissipation, and other functions of the metal layer 14, in this embodiment of the disclosure, the surface of the thick material region 132 facing away from the display panel 11 is flush with the surface of the metal layer 14 facing away from the display panel 11. That is, the thickness difference along the second direction between the surface of the thick material region 132 facing away from the display panel 11 and the surface of the thin material region 131 facing away from the display panel 11 is equal to the thickness of the metal layer 14 along the second direction. For example, if the thickness of the metal layer 14 along the second direction is 0.03 mm, then the thickness difference along the second direction between the surface of the thick material region 132 facing away from the display panel 11 and the surface of the thin material region 131 facing away from the display panel 11 is set to 0.03 mm.

[0059] As shown in Figure 3, when the surface of the thick material area 132 facing away from the display panel 11 is flush with the surface of the metal layer 14 facing away from the display panel 11, the metal layer 14 and the surface of the thick material area 132 facing away from the display panel 11 are on the same plane. Therefore, in order to ensure the protective effect of the protective layer 15 on the metal layer 14 and the thick material area 132 of the composite material layer 13, the orthographic projection of the protective layer 15 on the display panel 11 covers the orthographic projection of the metal layer 14 and the thick material area 132 on the display panel 11.

[0060] In some alternative embodiments, to further improve the compatibility of the thick material region 132 of the composite material layer 13 with foreign objects, the thickness of the thick material region 132 along the second direction can be further increased. Specifically, FIG4 shows a schematic diagram of a protective layer surface and a thick material region surface being flush, according to an embodiment of the present disclosure. As shown in FIG4, the orthographic projection of the protective layer 15 on the display panel 11 coincides with the orthographic projection of the thin material region 131 on the display panel 11. That is, the orthographic projection of the protective layer 15 on the display panel 11 coincides with the orthographic projection of the metal layer 14 on the display panel 11. Since the thick material region 132 is disposed outside the edge of the thin material region 131, the thin material region 131 and the thick material region 132 form a receiving space, and the metal layer 14 and the protective layer 15 are stacked in the receiving space. In order to ensure that the display module has a flat surface for easy assembly, the surface of the thick material area 132 facing away from the display panel 11 is flush with the surface of the protective layer 15 facing away from the display panel 11. In other words, the thickness difference between the surface of the thick material area 132 facing away from the display panel 11 and the surface of the thin material area 131 facing away from the display panel 11 along the second direction is equal to the sum of the thicknesses of the metal layer 14 and the protective layer 15 along the second direction.

[0061] In this embodiment, by disposing the protective layer 15 and the metal layer 14 within the accommodating space formed by the thick material region 132 and the thin material region 131, and by aligning the surface of the thick material region 132 facing away from the display panel 11 with the surface of the protective layer 15 facing away from the display panel 11, the thickness of the thick material region 132 is effectively increased, thereby improving its compatibility with foreign objects. For example, if the thickness of the metal layer 14 along the second direction is 0.03 mm and the thickness of the protective layer 15 along the second direction is 0.05 mm, then the thickness difference along the second direction between the surface of the thick material region 132 facing away from the display panel 11 and the surface of the thin material region 131 facing away from the display panel 11 is set to 0.08 mm.

[0062] In some alternative embodiments, the thick material region 132 is disposed on the first side, the second side, and the third side of the thin material region 131, wherein the material of the thick material region 132 located on the first side, the second side, and the third side of the thin material region 131 can be integrally formed (as shown in FIG1); FIG6 shows a schematic diagram of a segmented thick material region according to an embodiment of the present disclosure. As shown in FIG6, the material of the thick material region 132 located on the first side, the second side, and the third side of the thin material region 131 can also be segmented and formed independently.

[0063] In some alternative embodiments, since the larger the area occupied by the thick material region 132 in the composite material layer 13, the larger the area in the composite material layer 13 that can be deformed, the smaller the area of ​​the thin material region 131 that ensures the hardness of the composite material layer 13. This will weaken the fixing ability of the composite material layer 13 to a certain extent. However, in the display module, when the location of the foreign object residue is only in a part of the display module, the thick material region 132 can be set only for the part of the foreign object residue, thereby maximizing the fixing ability of the composite material layer 13 while ensuring the compatibility of the foreign object in that area. Specifically, Figure 7 shows a schematic diagram of a local area of ​​a thin material region protruding toward the backlight side to form a thick material region according to an embodiment of the present disclosure. As shown in Figure 7, a local area of ​​the thin material region 131 protrudes toward the backlight side of the display panel 11 to form the thick material region 132. The local area corresponds to the area where foreign matter remains in the display module. At this time, the surface of the material on the thin material region 131 corresponding to the local area protrudes from the side of the display panel 11 relative to the surface of the material on the thin material region 131 that does not correspond to the local area, thereby forming the thick material region 132 in the local area.

[0064] Optionally, the local area corresponds to the area where foreign matter remains in the display module. That is, the local area may be located at at least one edge of the thin material area 131, and / or, the local area may also be located inside the thin material area 131. Wherein, the local area being located at the edge of the thin material area 131 means that the structure of the thick material area 132 is located inside the edge of the thin material area 131, and the edge of the thick material area 132 away from the center of the thin material area 131 is the same edge as the edge of the thin material area 131; the local area being located inside the thin material area 131 means that all edges of the thick material area 132 are located inside the edge of the thin material area 131.

[0065] It is easy to understand that the local area can be one or more. Optionally, if there are multiple local areas, the multiple local areas can all be set on the same side edge of the thin material area 131. Among the multiple thick material areas 132 corresponding to the multiple local areas, adjacent thick material areas 132 can be arranged adjacent to each other or spaced apart on the same side edge.

[0066] Optionally, if there are multiple local regions, the multiple local regions may be located at the edges of at least two of the first, second, and third sides of the thin material region 131, and the thick material region 132 corresponding to the multiple local regions may be located at the edges of at least two of the first, second, and third sides of the thin material region 131.

[0067] Optionally, if there are multiple local regions, the multiple local regions may be located at the edge of at least one of the first side, second side, and third side of the thin material region 131 and inside the thin material region 131, and the thick material region 132 corresponding to the multiple local regions may be located at the edge of at least one of the first side, second side, and third side of the thin material region 131 and inside the thin material region 131.

[0068] Optionally, if there is only one local region, the local region is the edge region of the thin material region 131. The local region of the thin material region 131 protrudes towards the backlight side of the display panel 11 to form the thick material region 132. That is, the thick material region 132 is configured to cover the side surface of the local region of the thin material region 131 away from the display panel 11. In this case, the orthographic projection of the thick material region 132 on the display panel 11 is located inside the orthographic projection of the thin material region 131 on the display panel 11. In this embodiment, the edge region of the thin material region 131 refers to the region located between the edges of the first, second, and third sides of the thin material region 131 and the central region of the thin material region 131.

[0069] In some alternative embodiments, since the orthographic projection of the metal layer 14 on the display panel 11 coincides with the orthographic projection of the thin material area 131 on the display panel 11, and the thick material area 132 is formed by thickening the thin material area 131, the thickness difference between the thick material area 132 protruding towards the backlight side of the display panel 11 and the thin material area 131 makes it difficult for the metal layer 14 to maintain flatness. Therefore, in this embodiment, the metal layer 14 is provided with an opening 141 corresponding to a local area of ​​the thin material area 131, and the thick material area 132 fills the interior of the opening to achieve the fitting of the thick material area 132 and the metal layer 14. By providing the opening 141, the metal layer 14 avoids the protruding portion of the thick material area 132 relative to the thin material area 131, ensuring that the metal layer 14 has a flat surface and avoiding adverse effects on the performance of the metal layer 14.

[0070] Furthermore, although the opening 141 ensures that the metal layer 14 itself has a flat surface, the thick material area 132 that fits into the opening 141 may still not match the thickness of the metal layer 14, which may cause unevenness in the area corresponding to the thick material area 132 on the side of the metal layer 14 away from the display panel 11. Therefore, the side of the thick material area 132 away from the display panel 11 is flush with the side of the metal layer 14 away from the display panel 11.

[0071] In some alternative embodiments, when a portion of the thin material area 131 protrudes towards the backlight side of the display panel 11 to form the thick material area 132, the orthographic projection shape of the thick material area 132 on the display panel 11 is a polygon, an arc, or other irregular shape. For example, the orthographic projection shape of the thick material area 132 on the display panel 11 can be a rectangle, a triangle, a hexagon, etc.

[0072] Optionally, when the orthographic projection shape of the thick material area 132 on the display panel 11 is polygonal, and the thick material area 132 is located at at least one side edge of the thin material area 131, in order to ensure that the thick material area 132 covers the edge area to the maximum extent to accommodate foreign objects (considering the edge effect, foreign objects are more likely to remain at the edge in a local area), the polygonal side is taken as the side edge of the thick material area 132 away from the center of the thin material area 131.

[0073] Optionally, the orthographic projection shape and size of the opening 141 on the metal layer 14 onto the display panel 11 are the same as the orthographic projection shape and size of the thick material area 132 onto the display panel 11, so as to ensure that there is no gap between the thick material area 132 and the opening 141 of the metal layer 14.

[0074] In some alternative embodiments, the thin material area 131 may also protrude entirely toward the backlight side of the display panel 11 to form the thick material area 132. That is, the thick material area 132 is configured to cover the entire surface of the thin material area 131 away from the display panel 11. In this case, the orthographic projection of the thick material area 132 on the display panel 11 coincides with the orthographic projection of the thin material area 131 on the display panel 11.

[0075] In some alternative embodiments, FIG9 shows a schematic cross-sectional view of the layered structure of a composite material layer according to an embodiment of the present disclosure. As shown in FIG9, the composite material layer 13 includes a buffer layer 135 and a first adhesive layer 133. The first adhesive layer 133 is disposed on the side of the buffer layer 135 near the display panel 11. The first adhesive layer 133 is used to fix the composite material layer 13 to the back film layer 12. The buffer layer 135 is used to provide the deformation capability and hardness of the composite material layer 13. The first adhesive layer 133 covers the entire surface of the thin material area 131 and the thick material area 132 of the composite material layer 13 near the back film layer 12. Optionally, the material of the first adhesive layer 133 is a mesh adhesive.

[0076] In some optional embodiments, FIG5 shows a schematic diagram of a release film attached to a thick material area according to an embodiment of the present disclosure. As shown in FIG5, when the protective layer 15 is disposed within the receiving space formed by the thick material area 132 and the thin material area 131, the surface of the protective layer 15 facing away from the display panel 11 is flush with the surface of the thick material area 132 facing away from the display panel 11, and the surface of the thick material area 132 facing away from the display panel 11 is exposed. At this time, the thick material area 132 of the composite material layer 13 also includes a second adhesive layer 134, which is disposed on the side of the buffer layer 135 facing away from the display panel 11. The second adhesive layer 134 is used to bond the display module to the middle frame of the display device. Optionally, in order to avoid the second adhesive layer 134 accidentally bonding other components before bonding the middle frame, a release film 136 is attached to the side of the second adhesive layer 134 facing away from the display panel 11.

[0077] In some optional embodiments, as shown in FIG9, the buffer layer 135 includes a first sub-layer 1351 and a second sub-layer 1352 stacked together. The first sub-layer 1351 is disposed close to the display panel 11, and the second sub-layer 1352 is disposed on the side of the first sub-layer 1351 away from the display panel 11. The foaming ratio of the first sub-layer 1351 is less than that of the second sub-layer 1352. It should be noted that the foaming ratio refers to the ratio of the volume of the buffer layer 135 material after foaming to the volume of the buffer layer 135 material before foaming when the material of the buffer layer 135 is foam. The foaming ratio is used to characterize the degree of foaming of the buffer layer 135 (e.g., the first sub-layer 1351 and the second sub-layer 1352) material. Specifically, because the foaming ratio of the first sub-layer 1351 is smaller than that of the second sub-layer 1352, the expansion degree of the material in the first sub-layer 1351 during the foaming process is relatively low, its density is relatively high, the pores are small and uniform, and the pore walls are thicker. Therefore, the structure of the first sub-layer 1351 exhibits better hardness and strength, but its elasticity and cushioning performance (i.e., deformation capacity) are relatively weak. Therefore, the first sub-layer 1351 is used to improve the front impact resistance of the display panel 11. In this embodiment, the first sub-layer 1351 is disposed close to the display panel 11. As the material of the thin material area 131 and the thick material area 132 on the side close to the display panel 11, when subjected to greater forward pressure (the light-emitting side of the display panel 11), the harder first sub-layer 1351 can avoid the film imprint formed on the display panel 11 due to forward pressure.

[0078] Because the second sublayer 1352 has a higher foaming ratio than the first sublayer 1351, the material of the second sublayer 1352 expands more during the foaming process and has a lower density. This results in larger and more uneven pores and thinner pore walls in the second sublayer 1352, leading to a soft texture, good elasticity, and excellent cushioning performance, but relatively poor strength and wear resistance. Therefore, in this embodiment, the second sublayer 1352 is used to improve the foreign object compatibility of the buffer layer 135. By placing the second sublayer 1352 on the side away from the display panel 11, when subjected to greater pressure from foreign object residue on the back side (backlight side of the display panel 11), the second sublayer 1352, with its stronger deformation capability, can disperse stress and prevent damage to the display panel 11.

[0079] In some alternative embodiments, as shown in FIG9, the first sub-layer 1351 and the second sub-layer 1352 can be integrally formed. The portion of the thicker material region 132 protruding relative to the thinner material region 131 is made of the material of the second sub-layer 1352. The high foaming ratio material of the second sub-layer 1352 provides strong deformation capability to the portion of the thicker material region 132 protruding relative to the thinner material region 131, thereby ensuring high compatibility with foreign matter and effectively eliminating black spot phenomena. To further improve the compatibility of the thicker material region 132 with foreign matter, the thickness can be increased... The material proportion of the second sub-layer 1352 in material region 132, specifically, the portion of the thick material region 132 aligned with the thin material region 131 includes the material of the second sub-layer 1352 and the material of the first sub-layer 1351. The portion of the thick material region 132 aligned with the thin material region 131 refers to the portion where the orthographic projections of the thick material region 132 and the thin material region 131 coincide on a plane extending along the second direction, that is, the portion between the plane containing the side of the thin material region 131 closest to the display panel 11 and the plane containing the side furthest from the display panel 11. Preferably, the first sub-layer 1351 and the second sub-layer 1352 have the same thickness along the second direction to simultaneously ensure suitable deformation capacity and hardness within the buffer layer 135.

[0080] In some alternative embodiments, FIG10 shows a schematic cross-sectional view of another composite material layer hierarchical structure according to an embodiment of the present disclosure. As shown in FIG10, within the thick material region 132, the first sub-layer 1351 and the second sub-layer 1352 can be segmented and laminated. The portion of the thick material region 132 protruding relative to the thin material region 131 is the material of the second sub-layer 1352, and the portion of the thick material region 132 aligned with the thin material region 131 is the material of the first sub-layer 1351.

[0081] This disclosure provides a display module, comprising: a display panel; a composite material layer disposed on the backlight side of the display panel, the composite material layer including a thin material area and a thick material area, wherein the surface of the thick material area facing away from the display panel protrudes towards the backlight side of the display panel relative to the surface of the thin material area facing away from the display panel; and a metal layer disposed on the side of the thin material area of ​​the composite material layer facing away from the display panel, wherein the orthographic projection of the metal layer on the display panel coincides with the orthographic projection of the thin material area on the display panel. This disclosure increases the local thickness of the composite material layer by providing a thick material area protruding towards the backlight side relative to the thin material area. The thick material area absorbs the expansion stress of foreign objects and the overall compressive stress, thereby improving the compatibility of the display module with foreign objects, reducing damage to the display panel from foreign objects, and effectively eliminating the black spot phenomenon of the display module.

[0082] Based on the same inventive concept, this disclosure provides a display device, which includes a display panel as described in the embodiments of this disclosure.

[0083] In some optional embodiments, the display device includes, but is not limited to, any product or component with touch display function such as a television, laptop, tablet, mobile phone, personal digital assistant (PDA), navigator, wearable device, virtual reality (VR) device, etc. Those skilled in the art can make appropriate selections according to the actual use of the display device, and this disclosure will not elaborate further.

[0084] It should be noted that, in addition to the display panel, the display device also includes other necessary components and parts. Taking a monitor as an example, the display device may also include a housing, circuit board, power cord, etc. Those skilled in the art can make corresponding additions according to the specific usage requirements of the display device, which will not be elaborated here.

[0085] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0086] In the description of this specification, it should be understood that the terms "center," "thickness," "upper," "lower," "front," "rear," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0087] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0088] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0089] The foregoing application provides many different implementations or examples for carrying out different structures of this disclosure. To simplify this disclosure, the components and arrangements of specific examples are described above. Of course, these are merely examples and are not intended to limit this disclosure. Furthermore, reference numerals and / or reference letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0090] The terms "an embodiment," "embodiment," or "one or more embodiments" as used herein mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of this disclosure. Furthermore, please note that the examples of the phrase "in one embodiment" do not necessarily all refer to the same embodiment.

[0091] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of this disclosure may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0092] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0093] The above provides a detailed description of a display module and display device provided by this disclosure. Specific examples have been used to illustrate the principles and implementation methods of this disclosure. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this disclosure. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this disclosure. Therefore, the content of this specification should not be construed as a limitation of this disclosure.

Claims

1. A display module, characterized in that, The display module includes: Display panel; A composite material layer is disposed on the backlight side of the display panel. The composite material layer includes a thin material area and a thick material area. The surface of the thick material area facing away from the display panel protrudes toward the backlight side of the display panel relative to the surface of the thin material area facing away from the display panel. A metal layer is disposed on the side of the thin material area of ​​the composite material layer away from the display panel, and the orthographic projection of the metal layer on the display panel coincides with the orthographic projection of the thin material area on the display panel.

2. The display module according to claim 1, characterized in that, The thick material area is disposed on at least one of the first side, second side and third side of the thin material area, wherein the first side, second side and third side of the thin material area are respectively adjacent to the surface of the thin material area near the display panel, the first side is disposed opposite to the second side and is located on both sides of the third side; The width of the thick material area on the target side along the first direction is less than or equal to the width of the thin material area along the first direction, where the first direction is the direction in which the target side edge of the thin material area extends, and the target side is the first side, the second side, or the third side.

3. The display module according to claim 2, characterized in that, The surface of the thick material region facing away from the display panel is flush with the surface of the metal layer facing away from the display panel.

4. The display module according to claim 3, characterized in that, The display module also includes a protective layer, which is disposed on the side of the metal layer opposite to the display panel; The orthographic projection of the protective layer on the display panel covers the orthographic projection of the metal layer and the thick material area on the display panel.

5. The display module according to claim 2, characterized in that, The display module also includes a protective layer, which is disposed on the side of the metal layer opposite to the display panel; The orthographic projection of the protective layer on the display panel coincides with the orthographic projection of the thin material area on the display panel.

6. The display module according to claim 5, characterized in that, The surface of the thick material area facing away from the display panel is flush with the surface of the protective layer facing away from the display panel.

7. The display module according to claim 1, characterized in that, A local area of ​​the thin material region protrudes towards the backlight side of the display panel to form the thick material region; The metal layer has an opening corresponding to a local area of ​​the thin material area, the thick material area fills the opening, and the surface of the thick material area away from the display panel is flush with the surface of the metal layer away from the display panel.

8. The display module according to claim 7, characterized in that, The local area is located at at least one edge of the thin material area, and / or the local area is located inside the thin material area.

9. The display module according to claim 7, characterized in that, The orthographic projection shape of the thick material area on the display panel is a polygon, an arc, or other irregular shape.

10. The display module according to claim 1, characterized in that, The composite material layer includes a buffer layer and a first adhesive layer, wherein the first adhesive layer is disposed on the side of the buffer layer near the display panel.

11. The display module according to claim 10, characterized in that, The buffer layer includes a first sub-layer and a second sub-layer stacked together. The first sub-layer is disposed close to the display panel, and the foaming ratio of the first sub-layer is less than that of the second sub-layer.

12. The display module according to claim 11, characterized in that, The portion of the thick material region that protrudes relative to the thin material region is the material of the second sub-layer, and the portion of the thick material region that is aligned with the thin material region includes the material of the second sub-layer and the material of the first sub-layer.

13. The display module according to claim 12, characterized in that, The first sublayer and the second sublayer have the same thickness along a second direction, which is the direction in which the display panel points towards the composite material layer.

14. The display module according to claim 11, characterized in that, The portion of the thick material region that protrudes relative to the thin material region is the material of the second sub-layer, and the portion of the thick material region that is aligned with the thin material region is the material of the first sub-layer.

15. The display module according to claim 2, characterized in that, The width of the thick material region along the first direction is less than or equal to 10 mm.

16. A display device, characterized in that, The display device includes a display module as described in any one of claims 1 to 15.

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