WO2022000607A1 - 显示装置 - Google Patents
显示装置 Download PDFInfo
- Publication number
- WO2022000607A1 WO2022000607A1 PCT/CN2020/103223 CN2020103223W WO2022000607A1 WO 2022000607 A1 WO2022000607 A1 WO 2022000607A1 CN 2020103223 W CN2020103223 W CN 2020103223W WO 2022000607 A1 WO2022000607 A1 WO 2022000607A1
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- WO
- WIPO (PCT)
- Prior art keywords
- protective layer
- display device
- bending
- layer
- adhesive layer
- Prior art date
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
Definitions
- the present application relates to the field of display technology, and in particular, to a display device.
- the existing display technology is developing in the direction of flexible display.
- the existing flexible display device includes a flexible display panel, a touch layer, a protective layer, a cover plate, etc.
- Adhesive materials will be used to connect the flexible display panel to the touch layer, protective layer and cover plate, but the touch layer, protective layer, cover plate and adhesive material increase the thickness of the flexible display device, and form a relatively thick layer in the bending area. The large stress results in poor bending resistance of the flexible display device.
- the existing flexible display device has the technical problem that the protective layer increases the stress in the bending region, resulting in poor bending resistance of the flexible display device.
- the embodiment of the present application provides a display device, which is used to alleviate the technical problem that the existing flexible display device has a protective layer that increases the stress of the bending area, resulting in poor bending resistance of the flexible display device.
- An embodiment of the present application provides a display device, and the display device includes:
- At least one of the first protective layer and the second protective layer is formed with a stress buffer structure, and the stress buffer structure is used to improve the bending resistance of the bending region.
- the stress buffer structure includes at least one of protrusions and grooves.
- the first protective layer is provided with a stress buffer structure.
- the first protective layer includes a first surface in contact with the first adhesive layer, and a second surface away from the first adhesive layer, the first protective layer on the first adhesive layer A stress buffer structure is arranged on the surface, and the second surface is a flat surface.
- the first protective layer includes a first surface in contact with the first adhesive layer, and a second surface away from the first adhesive layer, the first protective layer on the first adhesive layer Grooves are formed on the surface, and protrusions are formed on the second surface of the first protective layer.
- the thickness of the first protective layer in the bending region is equal to the thickness of the first protective layer in the non-bending region.
- the first protective layer includes a first surface in contact with the first adhesive layer, and a second surface away from the first adhesive layer, the first protective layer on the first adhesive layer Protrusions and grooves are formed on the surface, and the first protective layer is formed with protrusions and grooves on the second surface.
- the second protective layer is provided with a stress buffer structure.
- the second protective layer includes a first surface in contact with a second adhesive layer, and a second surface away from the second adhesive layer, the second protective layer on the first surface A stress buffer structure is arranged on the surface, and the second surface is a flat surface.
- the second protective layer is formed with grooves on the first surface, and the second adhesive layer is filled into the grooves.
- the second protective layer includes a first surface in contact with the second adhesive layer, and a second surface remote from the second adhesive layer, on the first surface of the second protective layer Grooves are formed, and protrusions are formed on the second surface of the second protective layer.
- both the first protective layer and the second protective layer are provided with stress buffer structures.
- the first protective layer is formed with protrusions in the bending region
- the second protective layer is formed with protrusions and grooves in the bending region.
- the display device further includes a non-bending area, the non-bending area is located on both sides of the bending area, and the thickness of the first protective layer in the bending area is less than or equal to the thickness of the bending area. the thickness of the first protective layer in the non-bending region.
- the first protective layer includes a first surface in contact with the first adhesive layer and a second surface away from the first adhesive layer, the first protective layer on the first surface Protrusions are formed.
- the bending area includes a first bending area and a second bending area
- the flexible display panel further includes a non-bending area
- the first bending area is disposed on the non-bending area between the regions, the non-bending region is arranged between the first bending region and the second bending region, and in the first bending region, the first protective layer and the second protective layer At least one of them is formed with a stress buffer structure.
- the first protective layer includes a touch layer and a cover plate.
- the second protective layer includes a polyethylene terephthalate protective layer and a copper protective layer.
- the flexible display panel includes one of an OLED display panel and a liquid crystal display panel.
- the material of the first adhesion layer includes optical glue.
- An embodiment of the present application provides a display device, the display device includes a first protective layer, a first adhesive layer, a flexible display panel, a second adhesive layer and a second protective layer, wherein the first adhesive layer is disposed on the on the first protective layer, the flexible display panel is disposed on the first adhesive layer, the second adhesive layer is disposed on the flexible display panel, and the second protective layer is disposed on the first adhesive layer On the two adhesive layers, wherein, in the bending area, at least one of the first protective layer and the second protective layer is formed with a stress buffer structure, and the stress buffer structure is used to improve the bending area.
- Bending resistance by forming a stress buffer structure on at least one of the first protective layer and the second protective layer in the bending area, the stress of the first protective layer and the second protective layer is reduced, thereby improving the bending area.
- the anti-bending performance alleviates the technical problem that the existing flexible display device has a protective layer to increase the stress of the bending area, resulting in poor bending resistance of the flexible display device.
- FIG. 1 is a first schematic diagram of a display device provided in an embodiment of the present application in a bent state.
- FIG. 2 is a second schematic diagram of the display device provided in an embodiment of the present application in a bent state.
- FIG. 3 is a first schematic diagram of a display device provided in an embodiment of the present application in a flattened state.
- FIG. 4 is a second schematic diagram of a display device provided in an embodiment of the present application in a flattened state.
- FIG. 5 is a third schematic diagram of a display device provided in an embodiment of the present application in a flattened state.
- FIG. 6 is a fourth schematic diagram of a display device provided in an embodiment of the present application in a flattened state.
- FIG. 7 is a fifth schematic diagram of the display device provided in an embodiment of the present application in a flattened state.
- FIG. 8 is a sixth schematic diagram of a display device provided in an embodiment of the present application in a flattened state.
- FIG. 9 is a seventh schematic diagram of a display device provided in an embodiment of the present application in a flattened state.
- FIG. 10 is an eighth schematic diagram of a display device provided in an embodiment of the present application in a flattened state.
- FIG. 11 is a schematic diagram of a stress buffer structure in a bending region of a display device according to an embodiment of the present application.
- the embodiments of the present application aim at the technical problem that the protective layer of the existing flexible display device increases the stress of the bending region, resulting in poor bending resistance of the flexible display device.
- the embodiments of the present application are used to alleviate the problem.
- the display device provided in the embodiment of the present application includes a first protective layer 11 , a second protective layer 13 and a flexible display panel 12 .
- the display device can The bending display device in FIG. 1 is formed by bending to the second protective layer, or the display device can be bent to the first protective layer to form the bending display device in FIG. 2 .
- the embodiment of this application does not limit the display device to the first protection
- the layer and the second protective layer are bent, and the display device can be bent multiple times, and the display device can be a folded display device.
- an embodiment of the present application provides a display device, and the display device includes:
- the first adhesive layer 14 is arranged on the first protective layer 11;
- the flexible display panel 13 is arranged on the first adhesive layer 14;
- the second adhesive layer 15 is disposed on the flexible display panel 13;
- the second protective layer 12 is arranged on the second adhesive layer 15;
- At least one of the first protective layer 11 and the second protective layer 12 is formed with a stress buffering structure 111 , and the stress buffering structure 111 is used to improve the stability of the bending region 161 . Bending resistance.
- An embodiment of the present application provides a display device, the display device includes a first protective layer, a first adhesive layer, a flexible display panel, a second adhesive layer and a second protective layer, wherein the first adhesive layer is disposed on the on the first protective layer, the flexible display panel is disposed on the first adhesive layer, the second adhesive layer is disposed on the flexible display panel, and the second protective layer is disposed on the first adhesive layer On the two adhesive layers, wherein, in the bending area, at least one of the first protective layer and the second protective layer is formed with a stress buffer structure, and the stress buffer structure is used to improve the bending area.
- Bending resistance by forming a stress buffer structure on at least one of the first protective layer and the second protective layer in the bending area, the stress of the first protective layer and the second protective layer is reduced, thereby improving the bending area.
- the anti-bending performance alleviates the technical problem that the existing flexible display device has a protective layer to increase the stress of the bending area, resulting in poor bending resistance of the flexible display device.
- the stress buffer structure includes at least one of protrusions and grooves, that is, by arranging protrusions on the first protective layer or the second protective layer, or the first protective layer and the second protective layer The ridges and grooves are formed, thereby improving the bending resistance of the first protective layer or the second protective layer, or the first protective layer and the second protective layer, thereby improving the bending resistance of the display device.
- the first protective layer 11 is provided with a stress buffer structure 111 , and by arranging the stress buffer structure on the first protective layer, the first protective layer can improve the stability of the bending region. Bending resistance, thereby improving the bending resistance of the display device.
- the first protective layer 11 includes a first surface in contact with the first adhesive layer 14 and a second surface away from the first adhesive layer 14 , so The first protective layer 11 is provided with a stress buffer structure on the first surface, and the second surface is a flat surface, so that the second surface of the first protective layer remains flat, and the first surface of the first protective layer is flat.
- the stress buffer structure reduces stress and improves the bending resistance of the flexible display panel.
- the stress buffer structure includes grooves
- the first protective layer has grooves formed on the first surface
- the first adhesive layer is filled to the grooves Grooves, by forming grooves on the first surface of the first protective layer and filling the grooves with the first adhesive layer, the stress at the grooves can be reduced, thereby improving the bending resistance of the bending area and improving the display Bending resistance of the device.
- grooves are formed on the second surface of the first protective layer, and the first surface is a flat surface. Therefore, the bending resistance of the bending region is improved, and the bending resistance of the display device is improved.
- the first protective layer 11 includes a first surface in contact with the first adhesive layer 14 and a second surface away from the first adhesive layer 14 , so The first protective layer 11 is formed with grooves on the first surface, the first protective layer 11 is formed with protrusions on the second surface, and the first adhesive layer is filled into the grooves , by forming grooves on the first surface of the first protective layer and forming protrusions on the second surface, so that the first protective layer can reduce the stress, thereby improving the bending resistance of the bending area.
- the thickness L1 of the first protective layer 11 in the bending region 161 is equal to the thickness L1 of the first protective layer 11 in the non-bending region 162 , that is, in the first
- the thickness of the first protective layer in the bending area can be kept unchanged, but the first surface and the second surface in the bending area are concave and convex respectively, thereby reducing the bending area. stress and improve the bending resistance of the flexible display panel.
- both the bending area and the non-bending area may be the display area, or the non-bending area may be the display area, and the bending area may be the non-display area.
- the thickness L2 of the first protective layer 11 in the bending region 161 is smaller than the thickness L1 of the first protective layer 11 in the non-bending region 162 , and the thickness L1 of the first protective layer 11 in the non-bending region 162 is
- the thickness of the first protective layer in the bending area can also be reduced, thereby improving the resistance to bending and stretching or bending and compressive deformation of the first protective layer in the bending area. Therefore, the bending resistance of the flexible display panel can be improved.
- the first protective layer 11 includes a first surface in contact with the first adhesive layer 14 and a second surface away from the first adhesive layer 14 , so The first protective layer 11 is formed with protrusions on the first surface side, and the first protective layer 12 is formed with grooves on the second surface side.
- the second surface of the protective layer is configured as a concave surface, so that the stress of the first protective layer is reduced, thereby improving the bending resistance of the display device.
- the thickness L1 of the first protective layer 11 in the bending region 161 is equal to the thickness L1 of the first protective layer 11 in the non-bending region 162 , that is, the thickness L1 of the first protective layer 11 is formed on the first surface Convex, when a groove is formed on the second surface, the thickness of the first protective layer remains unchanged, but since the bending length inside the first protective layer is reduced during bending, the stress concentration in the bending area is reduced , thereby reducing the material extrusion in the bending area, thereby improving the bending and extrusion resistance of the display device.
- the thickness L3 of the first protective layer 11 in the bending region 161 is smaller than the thickness L1 of the first protective layer 11 in the non-bending region 162 , and a convex surface is formed on the first surface. Since the grooves are formed on the second surface, by reducing the thickness of the first protective layer in the bending area, the resistance to bending and stretching or bending and compression deformation of the first protective layer in the bending area can be improved.
- the first protective layer 11 includes a first surface in contact with the first adhesive layer 14 and a second surface away from the first adhesive layer 14 , so
- the first protective layer is formed with protrusions and grooves on the first surface
- the first protective layer is formed with protrusions and grooves on the second surface
- the protrusions on the first surface and the second surface are formed with protrusions and grooves.
- the grooves on the surface correspond
- the grooves on the first surface correspond to the protrusions on the second surface.
- the second protective layer is provided with a stress buffer structure, and the stress buffer structure is provided on the second protective layer to reduce the stress of the second protective layer, thereby improving the bending resistance of the second protective layer, The bending resistance of the display device is improved.
- the second protective layer includes a first surface in contact with the second adhesive layer, and a second surface away from the second adhesive layer, the second protective layer on the second surface
- a stress buffer structure is formed on one surface, and the second surface is a flat surface.
- grooves are formed on the first surface of the second protective layer, and the second adhesive layer is filled into the grooves.
- the two adhesive layers fill the grooves, which can reduce the bending stress in the bending area, thereby improving the bending resistance of the display device.
- grooves are formed on the second surface of the second protective layer, and the first surface is a flat surface.
- the second protective layer includes a first surface in contact with the second adhesive layer, and a second surface away from the second adhesive layer, the first surface of the second protective layer grooves are formed thereon, protrusions are formed on the second surface of the second protective layer, the second adhesive layer is filled to the grooves, and grooves are formed on the first surface of the second protective layer , a bulge is formed on the second surface, so that the second protective layer bulges outwards in the bending area as a whole.
- the bending length of the place increases, thereby reducing the stress concentration and avoiding the occurrence of bending. fracture, which increases the bending resistance of the display device.
- the thickness of the second protective layer in the bending region is equal to the thickness of the second protective layer in the non-bending region, that is, when the second protective layer is provided, the second protective layer is in the bending region It protrudes outward as a whole, but does not change the thickness of the second protective layer, thereby improving the bending resistance of the display device, and at the same time, the protective ability of the protective layer is not changed.
- the thickness of the second protective layer in the bending region is smaller than the thickness of the second protective layer in the non-bending region.
- the stress buffer structure is arranged on the second protective layer, the bending The thickness of the second protective layer in the bending area is reduced, thereby improving the resistance to bending and stretching or bending and compressing deformation of the second protective layer in the bending area, thereby improving the bending resistance of the flexible display panel.
- the second protective layer includes a first surface in contact with the second adhesive layer and a second surface away from the second adhesive layer, the second protective layer on the first surface A protrusion is formed on the side, and the second protective layer is formed with a groove on the second surface side, that is, an inward groove is formed on the second protective layer in the bending area, so that the second protective layer is integrally directed in the bending area.
- the inner dent reduces the length of the inner bending during bending, thereby reducing material extrusion, reducing stress concentration, and improving the bending resistance of the display device.
- the second protective layer is formed with protrusions on the side of the first surface
- the second protective layer is formed with grooves on the side of the second surface
- the second protective layer is formed on the bending area.
- the thickness is equal to the thickness of the second protective layer in the display, when a protrusion is formed on the first surface, and a groove is formed on the second surface, the thickness of the second protective layer is kept unchanged, and when it is bent to the second protective layer, the thickness of the second protective layer is kept constant.
- the bending length inside the display device is reduced, so that the stress concentration in the bending region is reduced, and the bending resistance performance of the display device is improved.
- the second protective layer is formed with protrusions on the side of the first surface
- the second protective layer is formed with grooves on the side of the second surface
- the second protective layer is formed on the bending area.
- the thickness of the second protective layer is smaller than the displayed thickness of the second protective layer.
- the stress buffer structure is formed on the second protective layer
- the thickness of the second protective layer in the bending area can also be reduced, thereby reducing the thickness of the second protective layer in the bending area.
- the second protective layer includes a first surface in contact with the second adhesive layer and a second surface away from the second adhesive layer, the second protective layer on the first surface Protrusions and grooves are formed on the second protective layer, protrusions and grooves are formed on the second surface, and the protrusions on the first surface correspond to the grooves on the second surface.
- the grooves on the first surface correspond to the protrusions on the second surface, and by simultaneously forming the protrusions and grooves on the first surface and the second surface, the bending resistance of the second protective layer is improved, and the display is improved. Bending resistance of the device.
- both the first protective layer 11 and the second protective layer 12 are provided with a stress buffer structure.
- the first protective layer 11 is formed with a first stress buffer structure 111.
- the second protective layer is formed with a second stress buffer structure 121.
- the first protective layer is formed with protrusions in the bending region
- the second protective layer is formed with protrusions and grooves in the bending region
- the first protective layer is formed with protrusions and grooves in the bending region.
- the protrusions are formed to reduce the stress concentration of the first protective layer
- the protrusions and grooves are formed on the second protective layer to reduce the stress concentration of the second protective layer, thereby reducing the bending resistance of the display device.
- the display device further includes a non-bending area, the non-bending area is located on both sides of the bending area, and the thickness of the first protective layer in the bending area is less than or equal to The thickness of the first protective layer in the non-bending region, that is, when the stress buffer structure is provided on the first protective layer, the thickness of the first protective layer in the bending region can be unchanged or reduced, thereby improving the display device's thickness. Bending resistance.
- the first protective layer is formed with grooves on the first surface, and has protrusions formed on the second surface, and the second protective layer is formed on the first surface A groove is formed, and when a stress buffer structure is formed on the first protective layer and the second protective layer, the stress buffer structures formed by the first protective layer and the second protective layer can be different, and the first protective layer and the second protective layer can be formed by different stress buffer structures.
- the stress buffer structure formed by the protective layer is the same, so that the bending resistance of the display device can be improved.
- the first protective layer 11 includes a first surface adhered to the first adhesive layer 14 and a second surface away from the first adhesive layer 14
- the The second protective layer 12 includes a first surface in contact with the second adhesive layer 15, and a second surface away from the second adhesive layer 15, the first protective layer 11 having grooves and protrusions formed on the first surface From the beginning, the first protective layer 11 is formed with grooves and protrusions on the second surface, the second protective layer 12 is formed with grooves on the first surface, and the second protective layer 12 is formed on the second surface.
- Protrusions and grooves are formed, and grooves and protrusions are provided on both surfaces of the first protective layer, and grooves and protrusions are provided on both surfaces of the second protective layer, so that the first protective layer can reduce stress concentration , the second protective layer reduces stress concentration, and at the same time, the thicknesses of the first protective layer and the second protective layer can be reduced, thereby improving the bending resistance of the display device.
- the first protective layer includes a first surface in contact with the first adhesive layer, and a second surface away from the first adhesive layer, the first protective layer is on the second surface
- a groove is formed on one surface, and the groove is filled with organic material.
- the organic material is provided in the groove, so as to reduce stress concentration and reduce stress everywhere. At the same time, the stress is further reduced, thereby improving the bending resistance of the display device.
- the second protective layer includes a first surface in contact with the second adhesive layer, and a second surface away from the second adhesive layer, the second protective layer on the second surface Grooves are formed on the two surfaces, and the grooves are filled with organic materials.
- the organic materials are arranged in the grooves, so as to reduce stress concentration and reduce stress everywhere. At the same time, the stress is further reduced, thereby improving the bending resistance of the display device.
- the display device may include only one bending area, which can be folded and folded, or double-sided display can be performed by one bending; or the display device may include multiple bending areas, and the display device
- the flexible display panel is made smaller and easier to carry by being folded and folded for multiple times.
- the outer protective layer by arranging grooves and protrusions on the first protective layer, the second protective layer, or the first protective layer and the second protective layer, when bending, the outer protective layer is The bending length of the layer becomes longer due to the existence of the stress buffer structure, thereby reducing the stress concentration, that is, providing a bent material structure for the bending area of the outer protective layer, thereby reducing the material stretching, reducing the stress concentration, and at the same time , the inner protective layer can reduce the length of the bend, thereby reducing the extrusion of the material and reducing the stress concentration.
- the bending area includes a first bending area and a second bending area
- the flexible display panel further includes a non-bending area
- the first bending area is disposed on the non-bending area between the bending areas
- the non-bending area is arranged between the first bending area and the second bending area, and in the first bending area, the first protection layer and the second protection layer
- At least one of the layers is formed with a stress buffer structure, and when the display device has two bending regions, a stress buffer structure can be provided on the first protective layer and the second protective layer in the first bending region, thereby reducing the first
- the stress concentration of the bending area improves the bending resistance performance of the first bending area, thereby improving the bending resistance performance of the display device.
- the bending area includes a first bending area and a second bending area
- the flexible display panel further includes a non-bending area
- the first bending area is disposed on the non-bending area between the bending areas
- the non-bending area is arranged between the first bending area and the second bending area, and in the second bending area
- the first protection layer and the second protection layer At least one of the layers is formed with a stress buffer structure, and when the display device has two bending regions, a stress buffer structure can be provided on the first protective layer and the second protective layer in the second bending region, thereby reducing the second bending region.
- the stress concentration of the bending area improves the bending resistance of the second bending area, thereby improving the bending resistance of the display device; however, the embodiment of the present application is not limited to this, and the first bending area and the second bending area can be The folded regions form a stress buffer structure.
- the first protective layer includes a touch layer and a cover plate.
- the first protective layer may include a touch layer, or a touch layer and a cover plate, so that the A stress buffer structure is formed on the touch layer, on the cover plate, or on the touch layer and the cover plate, thereby reducing stress concentration and improving the bending resistance of the display device.
- the second protective layer includes a polyethylene terephthalate protective layer and a copper protective layer.
- the second protective layer may be made of polyethylene terephthalate. It can also be composed of a polyethylene terephthalate protective layer and a copper protective layer, so that the second protective layer is designed to form a stress buffer structure, thereby increasing the bending resistance of the display device performance.
- the flexible display panel includes an OLED (Organic Light-Emitting Diode, organic light-emitting diode) display panel, when the flexible display panel is an OLED display panel, as shown in FIG. 3 , the display device further includes a polarizer 17 .
- OLED Organic Light-Emitting Diode, organic light-emitting diode
- the flexible display panel includes a liquid crystal display panel, a first polarizer is disposed between the liquid crystal display panel and the first adhesive layer, and the liquid crystal display panel and the second adhesive layer are provided with a first polarizer.
- a second polarizer is arranged between the attached layers; the flexible display panel in the embodiment of the present application may be an OLED display panel, a liquid crystal display panel, or other display panels that can realize flexible display and folding display.
- the material of the first adhesive layer includes OCA (Optically Clear Adhesive, Optically Clear Adhesive) Adhesive.
- the material of the second adhesive layer includes OCA glue.
- the surface when the surface is concave to the inside of the film layer, it is defined as a groove, and when the surface protrudes to the outside of the film layer, it is defined as a protrusion, for example, the first surface of the first protective layer is toward the inside of the first protective layer.
- the groove is defined as the first protective layer formed by the groove on the first surface, and the first surface of the first protective layer protrudes to the outside of the first protective layer, which is defined as the first protective layer formed on the first surface by the protrusion .
- the stress buffering structure 21 when the stress buffering structure 21 is arranged in the bending area of the display device 2 , the stress buffering structure 21 can be arranged as a continuous strip structure, and the bending area of the display device 2 can be arranged as a continuous strip structure.
- the schematic diagram of the structure is shown in (a) in Figure 11; the stress buffer structure 21 can also be set as a short strip structure, and the short strip structures can be arranged in staggered or staggered positions, and the schematic structural diagram of the bending area of the display device 2 is shown in Figure 11
- the stress buffer structure 21 can also be set as a point-like structure, and the schematic diagram of the structure of the bending area of the display device 2 is shown in (c) of FIG. 11 .
- An embodiment of the present application provides a display device, the display device includes a first protective layer, a first adhesive layer, a flexible display panel, a second adhesive layer and a second protective layer, wherein the first adhesive layer is disposed on the on the first protective layer, the flexible display panel is disposed on the first adhesive layer, the second adhesive layer is disposed on the flexible display panel, and the second protective layer is disposed on the first adhesive layer On the two adhesive layers, wherein, in the bending area, at least one of the first protective layer and the second protective layer is formed with a stress buffer structure, and the stress buffer structure is used to improve the bending area.
- Bending resistance by forming a stress buffer structure on at least one of the first protective layer and the second protective layer in the bending area, the stress of the first protective layer and the second protective layer is reduced, thereby improving the bending area.
- the anti-bending performance alleviates the technical problem that the existing flexible display device has a protective layer to increase the stress of the bending area, resulting in poor bending resistance of the flexible display device.
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Abstract
一种显示装置，通过在弯折区（161）的第一保护层（11）和第二保护层（12）中的至少一个上形成应力缓冲结构（111），使得第一保护层（11）和第二保护层（12）的应力降低，从而提高弯折区（161）的抗弯折性能，缓解了现有柔性显示器件存在保护层增加弯折区域的应力，导致柔性显示器件抗弯折性能较差的技术问题。
Description
本申请涉及显示技术领域，尤其是涉及一种显示装置。
现有显示技术朝着柔性显示的方向发展，现有的柔性显示器件包括柔性显示面板、触控层、保护层、盖板等，在柔性显示面板与触控层和保护层的连接过程中，会采用粘附材料将柔性显示面板与触控层、保护层和盖板连接，但触控层、保护层、盖板和粘附材料增加了柔性显示器件的厚度，且在弯折区域形成较大的应力，导致柔性显示器件的抗弯折性能较差。
所以，现有柔性显示器件存在保护层增加弯折区域的应力，导致柔性显示器件抗弯折性能较差的技术问题。
本申请实施例提供一种显示装置，用以缓解现有柔性显示器件存在保护层增加弯折区域的应力，导致柔性显示器件抗弯折性能较差的技术问题。
为解决上述问题，本申请提供的技术方案如下：
本申请实施例提供一种显示装置，该显示装置包括：
第一保护层；
第一粘附层，设置于所述第一保护层上；
柔性显示面板，设置于所述第一粘附层上；
第二粘附层，设置于所述柔性显示面板上；
第二保护层，设置于所述第二粘附层上；
其中，在弯折区，所述第一保护层和所述第二保护层中的至少一个形成有应力缓冲结构，所述应力缓冲结构用于提高所述弯折区的抗弯折性能。
在一些实施例中，所述应力缓冲结构包括凸起和凹槽中的至少一种。
在一些实施例中，所述第一保护层设有应力缓冲结构。
在一些实施例中，所述第一保护层包括与第一粘附层接触的第一表面、以及远离所述第一粘附层的第二表面，所述第一保护层在所述第一表面上设有应力缓冲结构，所述第二表面为平整表面。
在一些实施例中，所述第一保护层包括与第一粘附层接触的第一表面、以及远离所述第一粘附层的第二表面，所述第一保护层在所述第一表面上形成有凹槽，所述第一保护层在所述第二表面上形成有凸起。
在一些实施例中，所述第一保护层在弯折区的厚度等于第一保护层在非弯折区的厚度。
在一些实施例中，所述第一保护层包括与第一粘附层接触的第一表面、以及远离所述第一粘附层的第二表面，所述第一保护层在所述第一表面上形成有凸起和凹槽，所述第一保护层在所述第二表面上形成有凸起和凹槽。
在一些实施例中，所述第二保护层设有应力缓冲结构。
在一些实施例中，所述第二保护层包括与第二粘附层接触的第一表面、以及远离所述第二粘附层的第二表面，所述第二保护层在所述第一表面上设有应力缓冲结构，所述第二表面为平整表面。
在一些实施例中，所述第二保护层在所述第一表面上形成有凹槽，所述第二粘附层填充至所述凹槽。
在一些实施例中，所述第二保护层包括与第二粘附层接触的第一表面、以及远离所述第二粘附层的第二表面，所述第二保护层的第一表面上形成有凹槽，所述第二保护层的第二表面上形成有凸起。
在一些实施例中，所述第一保护层和所述第二保护层均设有应力缓冲结构。
在一些实施例中，所述第一保护层在所述弯折区形成有凸起，所述第二保护层在所述弯折区形成有凸起和凹槽。
在一些实施例中，所述显示装置还包括非弯折区，所述非弯折区位于所述弯折区两侧，所述第一保护层在所述弯折区的厚度小于或者等于所述第一保护层在所述非弯折区的厚度。
在一些实施例中，所述第一保护层包括与第一粘附层接触的第一表面和远离所述第一粘附层的第二表面，所述第一保护层在所述第一表面形成有凸起。
在一些实施例中，所述弯折区包括第一弯折区和第二弯折区，所述柔性显示面板还包括非弯折区，所述第一弯折区设置于所述非弯折区之间，所述非弯折区设置于所述第一弯折区和第二弯折区之间，在所述第一弯折区，所述第一保护层和所述第二保护层中的至少一个形成有应力缓冲结构。
在一些实施例中，所述第一保护层包括触控层和盖板。
在一些实施例中，所述第二保护层包括聚对苯二甲酸乙二醇酯保护层和铜保护层。
在一些实施例中，所述柔性显示面板包括OLED显示面板和液晶显示面板中的一种。
在一些实施例中，所述第一粘附层的材料包括光学胶。
本申请实施例提供一种显示装置，该显示装置包括第一保护层、第一粘附层、柔性显示面板、第二粘附层和第二保护层，所述第一粘附层设置于所述第一保护层上，所述柔性显示面板设置于所述第一粘附层上，所述第二粘附层设置于所述柔性显示面板上，所述第二保护层设置于所述第二粘附层上，其中，在弯折区，所述第一保护层和所述第二保护层中的至少一个形成有应力缓冲结构，所述应力缓冲结构用于提高所述弯折区的抗弯折性能；通过在弯折区的第一保护层和第二保护层中的至少一个上形成应力缓冲结构，使得第一保护层和第二保护层的应力降低，从而提高弯折区的抗弯折性能，缓解了现有柔性显示器件存在保护层增加弯折区域的应力，导致柔性显示器件抗弯折性能较差的技术问题。
图1为本申请实施例提供的显示装置在弯折状态下的第一示意图。
图2为本申请实施例提供的显示装置在弯折状态下的第二示意图。
图3为本申请实施例提供的显示装置在展平状态下的第一示意图。
图4为本申请实施例提供的显示装置在展平状态下的第二示意图。
图5为本申请实施例提供的显示装置在展平状态下的第三示意图。
图6为本申请实施例提供的显示装置在展平状态下的第四示意图。
图7为本申请实施例提供的显示装置在展平状态下的第五示意图。
图8为本申请实施例提供的显示装置在展平状态下的第六示意图。
图9为本申请实施例提供的显示装置在展平状态下的第七示意图。
图10为本申请实施例提供的显示装置在展平状态下的第八示意图。
图11为本申请实施例提供的显示装置的弯折区的应力缓冲结构的示意图。
本申请提供一种显示装置，为使本申请的目的、技术方案及效果更加清楚、明确，以下参照附图并举实施例对本申请进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本申请，并不用于限定本申请。
本申请实施例针对现有柔性显示器件存在保护层增加弯折区域的应力，导致柔性显示器件抗弯折性能较差的技术问题，本申请实施例用以缓解该问题。
如图1、如图2所示，本申请实施例提供的显示装置包括第一保护层11、第二保护层13和柔性显示面板12，从图1、图2中可以看出，显示装置可以向第二保护层弯折形成图1中的弯折显示装置，或者显示装置可以向第一保护层弯折形成图2中的弯折显示装置，本申请实施例不限定显示装置向第一保护层和第二保护层弯折，且显示装置可以经过多次弯折，显示装置可以为折叠显示装置。
如图3所示，本申请实施例提供一种显示装置，该显示装置包括：
第一保护层11；
第一粘附层14，设置于所述第一保护层11上；
柔性显示面板13，设置于所述第一粘附层14上；
第二粘附层15，设置于所述柔性显示面板13上；
第二保护层12，设置于所述第二粘附层15上；
其中，在弯折区161，所述第一保护层11和所述第二保护层12中的至少一个形成有应力缓冲结构111，所述应力缓冲结构111用于提高所述弯折区161的抗弯折性能。
本申请实施例提供一种显示装置，该显示装置包括第一保护层、第一粘附层、柔性显示面板、第二粘附层和第二保护层，所述第一粘附层设置于所述第一保护层上，所述柔性显示面板设置于所述第一粘附层上，所述第二粘附层设置于所述柔性显示面板上，所述第二保护层设置于所述第二粘附层上，其中，在弯折区，所述第一保护层和所述第二保护层中的至少一个形成有应力缓冲结构，所述应力缓冲结构用于提高所述弯折区的抗弯折性能；通过在弯折区的第一保护层和第二保护层中的至少一个上形成应力缓冲结构，使得第一保护层和第二保护层的应力降低，从而提高弯折区的抗弯折性能，缓解了现有柔性显示器件存在保护层增加弯折区域的应力，导致柔性显示器件抗弯折性能较差的技术问题。
在一种实施例中，所述应力缓冲结构包括凸起和凹槽中的至少一种，即通过在第一保护层或者第二保护层、或者第一保护层和第二保护层上设置凸起和凹槽，从而提高第一保护层或者第二保护层、或者第一保护层和第二保护层的抗弯折性能，从而提高显示装置的抗弯折性能。
在一种实施例中，如图3所示，所述第一保护层11设有应力缓冲结构111，通过在第一保护层上设置应力缓冲结构，使得第一保护层能够提高弯折区的抗弯折性能，从而提高显示装置的抗弯折性能。
在一种实施例中，如图3所示，所述第一保护层11包括与第一粘附层14接触的第一表面、以及远离所述第一粘附层14的第二表面，所述第一保护层11在所述第一表面上设有应力缓冲结构，所述第二表面为平整表面，使得第一保护层的第二表面保持平整，而第一保护层的第一表面的应力缓冲结构降低应力，提高柔性显示面板的抗弯折性能。
在一种实施例中，如图3所示，所述应力缓冲结构包括凹槽，所述第一保护层在第一表面上形成有凹槽，所述第一粘附层填充至所述凹槽，通过在第一保护层的第一表面上形成凹槽，使第一粘附层填充至所述凹槽，可以降低该处的应力，从而提高弯折区的抗弯折性能，提高显示装置的抗弯折性能。
在一种实施例中，所述第一保护层在第二表面上形成有凹槽，第一表面为平整表面，通过在第一保护层的第二表面上形成凹槽，可以降低该处的应力，从而提高弯折区的抗弯折性能，提高显示装置的抗弯折性能。
在一种实施例中，如图4所示，所述第一保护层11包括与第一粘附层14接触的第一表面、以及远离所述第一粘附层14的第二表面，所述第一保护层11在所述第一表面上形成有凹槽，所述第一保护层11在所述第二表面上形成有凸起，所述第一粘附层填充至所述凹槽，通过在第一保护层的第一表面上形成凹槽，在第二表面上形成凸起，使得第一保护层能够降低应力，从而提高弯折区的抗弯折性能。
在一种实施例中，如图4所示，所述第一保护层11在弯折区161的厚度L1等于所述第一保护层11在非弯折区162的厚度L1，即在第一保护层上设置应力缓冲结构时，可以使得第一保护层在弯折区的厚度不变，但在弯折区内的第一表面和第二表面分别为凹面和凸面，从而降低弯折区的应力，提高柔性显示面板的抗弯折性能。
需要说明的是，在本申请实施例中，弯折区与非弯折区均可以为显示区域，或者非弯折区为显示区域，弯折区为非显示区域。
在一种实施例中，如图5所示，所述第一保护层11在弯折区161的厚度L2小于所述第一保护层11在非弯折区162的厚度L1，在第一表面和第二表面分别设置凹槽和凸起时，还可以将弯折区的第一保护层的厚度降低，从而提高弯折区的第一保护层的抗弯折拉伸或者抗弯折压缩变形能力，从而提高柔性显示面板的抗弯折性能。
在一种实施例中，如图6所示，所述第一保护层11包括与第一粘附层14接触的第一表面、以及远离所述第一粘附层14的第二表面，所述第一保护层11在第一表面侧形成有凸起，所述第一保护层12在第二表面侧形成有凹槽，通过将第一保护层的第一表面设置为凸面，将第一保护层的第二表面设置为凹面，使得第一保护层的应力降低，从而提高了显示装置的抗弯折性能。
在一种实施例中，如图6所示，所述第一保护层11在弯折区161的厚度L1等于第一保护层11在非弯折区162的厚度L1，即在第一表面形成凸起，在第二表面形成凹槽时，使得第一保护层的厚度不变，但由于在弯折时，第一保护层内部的弯折长度降低，使得弯折区的应力集中性减小，从而降低了弯折区的材料挤压，从而提高了显示装置的抗弯折挤压性能。
在一种实施例中，如图7所示，所述第一保护层11在弯折区161的厚度L3小于第一保护层11在非弯折区162的厚度L1，在第一表面形成凸起，在第二表面形成凹槽的同时，通过降低弯折区内第一保护层的厚度，可以提高弯折区的第一保护层的抗弯折拉伸或者抗弯折压缩变形能力。
在一种实施例中，如图8所示，所述第一保护层11包括与第一粘附层14接触的第一表面、以及远离所述第一粘附层14的第二表面，所述第一保护层在第一表面上形成有凸起和凹槽，所述第一保护层在第二表面上形成有凸起和凹槽，且所述第一表面上的凸起与第二表面上的凹槽对应，所述第一表面上的凹槽与第二表面上的凸起对应，通过在第一表面上同时形成凸起和凹槽，在第二表面上同时形成凸起和凹槽，使得第一保护层的抗弯折性能提高，从而提高了显示装置的抗弯折性能。
在一种实施例中，所述第二保护层设有应力缓冲结构，在第二保护层上设置应力缓冲结构，降低第二保护层的应力，从而提高第二保护层的抗弯折性能，提高显示装置的抗弯折性能。
在一种实施例中，所述第二保护层包括与第二粘附层接触的第一表面、以及远离所述第二粘附层的第二表面，所述第二保护层在所述第一表面上形成有应力缓冲结构，所述第二表面为平整表面，通过在第二保护层的第一表面上设置应力缓冲结构，使得第二保护层在弯折区降低应力集中，从而提高显示装置的抗弯折性能。
在一种实施例中，所述第二保护层在所述第一表面上形成有凹槽，所述第二粘附层填充至所述凹槽，通过使得第一表面设置凹槽，使得第二粘附层填充凹槽，可以降低弯折区的弯折应力，从而提高显示装置的抗弯折性能。
在一种实施例中，所述第二保护层在第二表面形成有凹槽，第一表面为平整表面，通过在第二保护层的第二表面形成凹槽，使得在弯折时，第二保护层的第二表面被弯折时的应力降低，从而提高了显示装置的抗弯折性能。
在一种实施例中，所述第二保护层包括与第二粘附层接触的第一表面、以及远离所述第二粘附层的第二表面，所述第二保护层的第一表面上形成有凹槽，所述第二保护层的第二表面上形成有凸起，所述第二粘附层填充至所述凹槽，通过在第二保护层的第一表面上形成凹槽，在第二表面上形成凸起，使得第二保护层在弯折区整体向外凸起，在弯折时，该处的弯折长度增加，从而降低了应力集中性，避免弯折时出现断裂，增加了显示装置的抗弯折性能。
在一种实施例中，所述第二保护层在弯折区的厚度等于第二保护层在非弯折区的厚度，即在设置第二保护层时，使得第二保护层在弯折区整体向外凸起，但不改变第二保护层的厚度，从而提高了显示装置抗弯折性能，同时，不改变保护层的保护能力。
在一种实施例中，所述第二保护层在弯折区的厚度小于所述第二保护层在非弯折区的厚度，在第二保护层上设置应力缓冲结构时，还可以将弯折区的第二保护层的厚度降低，从而提高弯折区的第二保护层的抗弯折拉伸或者抗弯折压缩变形能力，从而提高柔性显示面板的抗弯折性能。
在一种实施例中，所述第二保护层包括与第二粘附层接触的第一表面、以及远离所述第二粘附层的第二表面，所述第二保护层在第一表面侧形成有凸起，所述第二保护层在第二表面侧形成有凹槽，即在弯折区的第二保护层上形成向内凹槽，使得第二保护层在弯折区整体向内凹陷，从而在弯折时，降低内部弯折的长度，从而降低材料挤压，减小应力集中性，提高显示装置的抗弯折性能。
在一种实施例中，所述第二保护层在第一表面侧形成有凸起，所述第二保护层在第二表面侧形成有凹槽，所述第二保护层在弯折区的厚度等于第二保护层在显示的厚度，在第一表面形成凸起，在第二表面形成凹槽时，使得第二保护层的厚度不变，而在向第二保护层弯折时，使得显示装置内部的弯折长度降低，从而使得弯折区的应力集中性降低，提高显示装置的抗弯折性能。
在一种实施例中，所述第二保护层在第一表面侧形成有凸起，所述第二保护层在第二表面侧形成有凹槽，所述第二保护层在弯折区的厚度小于第二保护层在显示的厚度，在第二保护层上形成应力缓冲结构时，还可以降低弯折区内第二保护层的厚度，从而降低所述弯折区的第二保护层的抗弯折拉伸或者抗弯折压缩变形能力，从而提高显示装置的抗弯折性能。
在一种实施例中，所述第二保护层包括与第二粘附层接触的第一表面、以及远离所述第二粘附层的第二表面，所述第二保护层在第一表面上形成有凸起和凹槽，所述第二保护层在第二表面上形成有凸起和凹槽，且所述第一表面上的凸起与第二表面上的凹槽对应，所述第一表面上的凹槽与第二表面上的凸起对应，通过在第一表面和第二表面上同时形成凸起和凹槽，提高了第二保护层的抗弯折性能，提高了显示装置的抗弯折性能。
在一种实施例中，如图9所示，所述第一保护层11和所述第二保护层12均设有应力缓冲结构，具体的，第一保护层11形成有第一应力缓冲结构111、第二保护层形成有第二应力缓冲结构121，通过在第一保护层和第二保护层上形成应力缓冲结构，使得第一保护层和第二保护层的在弯折时的应力集中性减小，从而进一步的提高显示装置的抗弯折性能。
在一种实施例中，所述第一保护层在所述弯折区形成有凸起，所述第二保护层在所述弯折区形成有凸起和凹槽，在第一保护层上形成凸起，降低第一保护层的应力集中性，在第二保护层上形成凸起和凹槽，降低第二保护层的应力集中性，从而降低显示装置的抗弯折性能。
在一种实施例中，所述显示装置还包括非弯折区，所述非弯折区位于所述弯折区两侧，所述第一保护层在所述弯折区的厚度小于或者等于所述第一保护层在所述非弯折区的厚度，即在第一保护层上设置应力缓冲结构时，第一保护层在弯折区的厚度可以不变或者降低，从而提高显示装置的抗弯折性能。
在一种实施例中，如图9所示，所述第一保护层在第一表面上形成有凹槽，在第二表面上形成有凸起，所述第二保护层在第一表面上形成有凹槽，在第一保护层和第二保护层上形成应力缓冲结构时，可以使得第一保护层和第二保护层形成的应力缓冲结构不同，也可以使得第一保护层与第二保护层形成的应力缓冲结构相同，使得显示装置的抗弯折性能提高即可。
在一种实施例中，如图10所示，所述第一保护层11包括与第一粘附层14粘附的第一表面、以及远离第一粘附层14的第二表面，所述第二保护层12包括与第二粘附层15接触的第一表面、以及远离第二粘附层15的第二表面，所述第一保护层11在第一表面上形成有凹槽和凸起、所述第一保护层11在第二表面上形成有凹槽和凸起，所述第二保护层12在第一表面上形成有凹槽，所述第二保护层12在第二表面形成有凸起和凹槽，通过在第一保护层的两个表面设置凹槽和凸起，在第二保护层的两个表面设置凹槽和凸起，使得第一保护层降低应力集中性，第二保护层降低应力集中性，同时，可以降低第一保护层和第二保护层的厚度，从而提高显示装置的抗弯折性能。
在一种实施例中，所述第一保护层包括与第一粘附层接触的第一表面、以及远离所述第一粘附层的第二表面，所述第一保护层在所述第一表面上形成有凹槽，所述凹槽内填充有有机材料，在第一保护层上设置凹槽的同时，通过在凹槽内设有有机材料，从而在降低应力集中，减小各处的应力的同时，进一步减小应力，从而提高显示装置的抗弯折性能。
在一种实施例中，所述第二保护层包括与第二粘附层接触的第一表面、以及远离所述第二粘附层的第二表面，所述第二保护层在所述第二表面上形成有凹槽，所述凹槽内填充有有机材料，在第二保护层上设置凹槽的同时，通过在凹槽内设有有机材料，从而在降低应力集中，减小各处的应力的同时，进一步减小应力，从而提高显示装置的抗弯折性能。
在本申请实施例中的显示装置中，显示装置可以为仅包括一个弯折区，通过一次弯折即可折叠收起、或者进行双面显示；或者显示装置包括多个弯折区，显示装置通过多次弯折进行折叠收起，使得柔性显示面板变小，便于携带。
在本申请实施例的显示装置中，通过将第一保护层、第二保护层、或者第一保护层和第二保护层上设置凹槽和凸起，使得在弯折时，位于外部的保护层的弯折长度由于应力缓冲结构的存在变长，从而降低了应力集中性，即为外部保护层的弯折区域提供弯折的材料结构，从而降低了材料拉伸，降低了应力集中，同时，在内部的保护层能够使弯折的长度降低，从而降低了材料挤压，降低了应力集中。
在一种实施例中，所述弯折区包括第一弯折区和第二弯折区，所述柔性显示面板还包括非弯折区，所述第一弯折区设置于所述非弯折区之间，所述非弯折区设置于所述第一弯折区和第二弯折区之间，在所述第一弯折区，所述第一保护层和所述第二保护层中的至少一个形成有应力缓冲结构，在显示装置具有两个弯折区时，可以在第一弯折区内的第一保护层和第二保护层上设置应力缓冲结构，从而降低第一弯折区的应力集中性，提高第一弯折区的抗弯折性能，从而提高显示装置的抗弯折性能。
在一种实施例中，所述弯折区包括第一弯折区和第二弯折区，所述柔性显示面板还包括非弯折区，所述第一弯折区设置于所述非弯折区之间，所述非弯折区设置于所述第一弯折区和第二弯折区之间，在所述第二弯折区，所述第一保护层和所述第二保护层中的至少一个形成有应力缓冲结构，在显示装置具有两个弯折区时，可以在第二弯折区内的第一保护层和第二保护层上设置应力缓冲结构，从而降低第二弯折区的应力集中性，提高第二弯折区的抗弯折性能，从而提高显示装置的抗弯折性能；但本申请实施例不限于此，可以在第一弯折区和第二弯折区形成应力缓冲结构。
在一种实施例中，所述第一保护层包括触控层和盖板，在设置第一保护层时，第一保护层可以包括触控层、或者包括触控层和盖板，从而在触控层上，或者在盖板上、或者在触控层和盖板上形成应力缓冲结构，从而降低应力集中，提高显示装置的抗弯折性能。
在一种实施例中，所述第二保护层包括聚对苯二甲酸乙二醇酯保护层和铜保护层，在设置第二保护层时，第二保护层可以由聚对苯二甲酸乙二醇酯保护层组成，也可以由聚对苯二甲酸乙二醇酯保护层和铜保护层组成，从而对第二保护层进行设计，形成应力缓冲结构，从而增大显示装置的抗弯折性能。
在一种实施例中，所述柔性显示面板包括OLED（Organic
Light-Emitting Diode，有机发光二极管）显示面板，在柔性显示面板为OLED显示面板时，如图3所示，显示装置还包括偏光片17。
在一种实施例中，所述柔性显示面板包括液晶显示面板，所述液晶显示面板与所述第一粘附层之间设有第一偏光片，所述液晶显示面板与所述第二粘附层之间设有第二偏光片；本申请实施例中的柔性显示面板可以为OLED显示面板，液晶显示面板，还可以为其他可以实现柔性显示和折叠显示的显示面板。
在一种实施例中，所述第一粘附层的材料包括OCA（Optically
Clear Adhesive，光学透明胶）胶。
在一种实施例中，所述第二粘附层的材料包括OCA胶。
在本申请实施例中，在表面向膜层内部凹陷时，定义为凹槽，在表面向膜层外部突出时，定义为凸起，例如第一保护层的第一表面向第一保护层内部凹槽，定义为第一保护层在第一表面上形成由凹槽，第一保护层的第一表面向第一保护层外部突出，定义为第一保护层在第一表面上形成由凸起。
在一种实施例中，如图11所示，在显示装置2的弯折区设置应力缓冲结构21时，可以将应力缓冲结构21设置为连续的长条结构，其显示装置2的弯折区的结构示意图如图11中的（a）所示；还可以将应力缓冲结构21设置为短条结构，短条结构可以交错或者错位设置，其显示装置2的弯折区的结构示意图如图11中的（b）所示；还可以将应力缓冲结构21设置为点状结构，其显示装置2的弯折区的结构示意图如图11中的（c）所示。
根据以上实施例可知：
本申请实施例提供一种显示装置，该显示装置包括第一保护层、第一粘附层、柔性显示面板、第二粘附层和第二保护层，所述第一粘附层设置于所述第一保护层上，所述柔性显示面板设置于所述第一粘附层上，所述第二粘附层设置于所述柔性显示面板上，所述第二保护层设置于所述第二粘附层上，其中，在弯折区，所述第一保护层和所述第二保护层中的至少一个形成有应力缓冲结构，所述应力缓冲结构用于提高所述弯折区的抗弯折性能；通过在弯折区的第一保护层和第二保护层中的至少一个上形成应力缓冲结构，使得第一保护层和第二保护层的应力降低，从而提高弯折区的抗弯折性能，缓解了现有柔性显示器件存在保护层增加弯折区域的应力，导致柔性显示器件抗弯折性能较差的技术问题。
可以理解的是，对本领域普通技术人员来说，可以根据本申请的技术方案及其发明构思加以等同替换或改变，而所有这些改变或替换都应属于本申请所附的权利要求的保护范围。
Claims (20)
- 一种显示装置，其包括：第一保护层；第一粘附层，设置于所述第一保护层上；柔性显示面板，设置于所述第一粘附层上；第二粘附层，设置于所述柔性显示面板上；第二保护层，设置于所述第二粘附层上；其中，在弯折区，所述第一保护层和所述第二保护层中的至少一个形成有应力缓冲结构，所述应力缓冲结构用于提高所述弯折区的抗弯折性能。
- 如权利要求1所述的显示装置，其中，所述应力缓冲结构包括凸起和凹槽中的至少一种。
- 如权利要求2所述的显示装置，其中，所述第一保护层设有应力缓冲结构。
- 如权利要求3所述的显示装置，其中，所述第一保护层包括与第一粘附层接触的第一表面、以及远离所述第一粘附层的第二表面，所述第一保护层在所述第一表面上设有应力缓冲结构，所述第二表面为平整表面。
- 如权利要求3所述的显示装置，其中，所述第一保护层包括与第一粘附层接触的第一表面、以及远离所述第一粘附层的第二表面，所述第一保护层在所述第一表面上形成有凹槽，所述第一保护层在所述第二表面上形成有凸起。
- 如权利要求5所述的显示装置，其中，所述第一保护层在弯折区的厚度等于第一保护层在非弯折区的厚度。
- 如权利要求3所述的显示装置，其中，所述第一保护层包括与第一粘附层接触的第一表面、以及远离所述第一粘附层的第二表面，所述第一保护层在所述第一表面上形成有凸起和凹槽，所述第一保护层在所述第二表面上形成有凸起和凹槽。
- 如权利要求2所述的显示装置，其中，所述第二保护层设有应力缓冲结构。
- 如权利要求8所述的显示装置，其中，所述第二保护层包括与第二粘附层接触的第一表面、以及远离所述第二粘附层的第二表面，所述第二保护层在所述第一表面上设有应力缓冲结构，所述第二表面为平整表面。
- 如权利要求9所述的显示装置，其中，所述第二保护层在所述第一表面上形成有凹槽，所述第二粘附层填充至所述凹槽。
- 如权利要求8所述的显示装置，其中，所述第二保护层包括与第二粘附层接触的第一表面、以及远离所述第二粘附层的第二表面，所述第二保护层的第一表面上形成有凹槽，所述第二保护层的第二表面上形成有凸起。
- 如权利要求2所述的显示装置，其中，所述第一保护层和所述第二保护层均设有应力缓冲结构。
- 如权利要求12所述的显示装置，其中，所述第一保护层在所述弯折区形成有凸起，所述第二保护层在所述弯折区形成有凸起和凹槽。
- 如权利要求13所述的显示装置，其中，所述显示装置还包括非弯折区，所述非弯折区位于所述弯折区两侧，所述第一保护层在所述弯折区的厚度小于或者等于所述第一保护层在所述非弯折区的厚度。
- 如权利要求2所述的显示装置，其中，所述第一保护层包括与第一粘附层接触的第一表面和远离所述第一粘附层的第二表面，所述第一保护层在所述第一表面形成有凸起。
- 如权利要求1所述的显示装置，其中，所述弯折区包括第一弯折区和第二弯折区，所述柔性显示面板还包括非弯折区，所述第一弯折区设置于所述非弯折区之间，所述非弯折区设置于所述第一弯折区和第二弯折区之间，在所述第一弯折区，所述第一保护层和所述第二保护层中的至少一个形成有应力缓冲结构。
- 如权利要求1所述的显示装置，其中，所述第一保护层包括触控层和盖板。
- 如权利要求1所述的显示装置，其中，所述第二保护层包括聚对苯二甲酸乙二醇酯保护层和铜保护层。
- 如权利要求1所述的显示装置，其中，所述柔性显示面板包括OLED显示面板和液晶显示面板中的一种。
- 如权利要求1所述的显示装置，其中，所述第一粘附层的材料包括光学胶。
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