Protective structure, OLED folding display module and display device

Abstract

The embodiments of the present application provide a protective structure, an OLED folding display module and a display device. The protective structure is used to protect the OLED display panel and includes a protective film, an air-conducting adhesive layer and a release layer; the air-conducting adhesive layer is located on one side of the protective film and the air-conducting adhesive layer has a patterned air-conducting groove; the release layer is located on the side of the air-conducting adhesive layer away from the protective film. The air-conducting adhesive layer in the protective structure provided in the present embodiment is provided with a patterned air-conducting groove. After the protective structure is pasted with the flexible cover plate of the OLED display panel to be protected after removing the release layer, the gas between the protective structure and the flexible cover plate of the OLED display panel can be discharged through the patterned air-conducting groove, thereby preventing the gas from existing between the protective structure and the flexible cover plate for a long time to form bubbles, thereby avoiding the pressure of the bubbles on the flexible cover plate and causing dents on the surface of the flexible cover plate and other poor appearance and affecting the display effect.

Description

Technical Field

[0001] The present application relates to the field of display technology, and specifically, to a protective structure, an OLED folding display module and a display device. Background Art

[0002] In existing foldable OLED (organic light-emitting diode) products, a flexible cover is used as the cover. Although the flexible cover has strong deformation ability and can meet the needs of folding products, its strength is poor.

[0003] Due to the poor strength of the cover of folding products, a protective film needs to be attached to the surface of the cover to prevent scratches on the cover when the screen module is shipped. However, due to process and inspection requirements, the protective structure often needs to be lifted for inspection and then manually reattached. During the reattachment process, bubbles will inevitably exist between the protective film and the cover. Due to the poor strength of the cover of folding products, the long-term presence of bubbles will cause dents on the surface of the cover and other poor appearances, and even affect the display effect. Summary of the invention

[0004] In view of the shortcomings of the existing methods, the present application proposes a protective structure, an OLED folding display module and a display device, which can avoid the presence of bubbles between the cover plate of the folding display screen and the protective structure, thereby avoiding the pressure of the bubbles on the cover plate of the folding display screen.

[0005] In a first aspect, an embodiment of the present application provides a protection structure for protecting an OLED display panel, the protection structure comprising:

[0006] Protective film;

[0007] An air-conducting adhesive layer, located on one side of the protective film and having patterned air-conducting grooves;

[0008] The release layer is located on the side of the air-conducting adhesive layer away from the protective film.

[0009] Optionally, the patterned air guide grooves are grid-shaped air guide grooves, strip-shaped air guide grooves or wavy air guide grooves.

[0010] Optionally, the thickness of the air-conducting adhesive layer is 8 μm to 15 μm.

[0011] Optionally, the distance between adjacent patterned air guide grooves is 0.5 mm to 3 mm.

[0012] Optionally, a protrusion adapted to the patterned air guide groove is provided on a side of the release layer close to the air guide adhesive layer.

[0013] In a second aspect, an embodiment of the present application provides an OLED foldable display module, wherein the OLED foldable display module comprises:

[0014] Display panel;

[0015] A flexible cover plate, located on one side of the light emitting surface of the display panel;

[0016] In the above-mentioned protective structure after the release layer is removed, the air-conducting adhesive layer is located between the protective film and the flexible cover plate, and the air-conducting adhesive layer is adhered to the flexible cover plate.

[0017] Optionally, the flexible cover plate is a polyimide film, a polyethylene terephthalate film or an ultra-thin flexible glass.

[0018] Optionally, the flexible cover layer includes a first flexible cover layer, a second flexible cover layer, and an adhesive layer located between the first flexible cover layer and the second flexible cover layer; the first flexible cover layer is a polyimide film, a polyethylene terephthalate film or an ultra-thin flexible glass, and the second flexible cover layer is a polyimide film, a polyethylene terephthalate film or an ultra-thin flexible glass.

[0019] Optionally, the OLED folding display module also includes: a polarizer located between the display panel and the flexible cover plate; and an optical adhesive layer located between the polarizer and the flexible cover plate and bonding the polarizer to the flexible cover plate.

[0020] In a third aspect, an embodiment of the present application provides an OLED folding display device, wherein the OLED folding display device includes the above-mentioned OLED folding display module.

[0021] The beneficial technical effects brought about by the technical solution provided by the embodiment of the present application are:

[0022] The embodiments of the present application provide a protective structure, an OLED folding display module and a display device. A patterned air guide groove is provided on the air guide adhesive layer in the protective structure. After the release layer of the protective structure is removed and the protective structure is bonded to the flexible cover plate of the display panel to be protected, the gas between the protective structure and the flexible cover plate of the display panel can be discharged through the patterned air guide groove, thereby preventing the gas from existing between the protective structure and the flexible cover plate for a long time to form bubbles, thereby avoiding the pressure of the bubbles on the flexible cover plate to cause dents on the surface of the flexible cover plate and other poor appearance and affecting the display effect.

[0023] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0025] Figure 1 It is a structural schematic diagram of an OLED display module with a protective structure attached in the prior art;

[0026] Figure 2 A schematic diagram of a cross-sectional structure of a protection structure provided in an embodiment of the present application;

[0027] Figure 3 A schematic top view of an air-conducting adhesive layer in a protective structure provided in an embodiment of the present application;

[0028] Figure 4 A schematic top view of another air-conducting adhesive layer in the protective structure provided in an embodiment of the present application;

[0029] Figure 5 A schematic top view of another air-conducting adhesive layer in the protection structure provided in an embodiment of the present application;

[0030] Figure 6 A schematic cross-sectional view of another protective structure provided in an embodiment of the present application;

[0031] Figure 7 A schematic diagram of the cross-sectional structure of an OLED foldable display module provided in an embodiment of the present application;

[0032] Figure 8 A schematic diagram of the cross-sectional structure of another OLED foldable display module provided in an embodiment of the present application;

[0033] Fig. 9 A schematic diagram of the cross-sectional structure of another OLED foldable display module provided in an embodiment of the present application;

[0034] Fig.10 A schematic diagram of the framework of an OLED foldable display device provided in an embodiment of the present application.

[0035] Reference numerals:

[0036] 1- Display panel;

[0037] 2-flexible cover plate; 201-first flexible cover plate layer; 202-adhesive layer; 203-second flexible cover plate layer;

[0038] 3-protective structure; 301-protective film; 302-air-conducting adhesive layer; 3021-patterned air-conducting groove; 303-release layer; 3031-protrusion;

[0039] 4- Polarizer;

[0040] 5-optical adhesive layer;

[0041] 3′-Protective structure in the prior art;

[0042] B-Bubbles. DETAILED DESCRIPTION

[0043] The present application is described in detail below, and examples of embodiments of the present application are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components with the same or similar functions. In addition, if the detailed description of the known technology is unnecessary for the features of the present application shown, it will be omitted. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be interpreted as limiting the present application.

[0044] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with those in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0045] Those skilled in the art will appreciate that, unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0046] In existing foldable OLED (organic light-emitting diode) products, a flexible cover is used as the cover. Although the flexible cover has strong deformation ability and can meet the needs of folding products, its strength is poor.

[0047] like Figure 1As shown, since the strength of the flexible cover plate of the folding product (for example, the flexible cover plate adopts CPI, i.e., Colorless PI, a highly transparent polyimide film) is relatively poor, when such screen modules (including the OLED display panel 1 and the flexible cover plate 2) are shipped, it is necessary to attach a protective structure 3′ to the surface of the flexible cover plate to prevent the surface of the flexible cover plate 2 from being scratched. However, due to process and inspection requirements, it is often necessary to lift up the protective structure 3′ for inspection, and then manually reattach the protective structure 3′. In the process of reattaching the protective structure 3′ to the surface of the flexible cover plate 2, there will inevitably be bubbles B between the protective structure 3′ and the flexible cover plate 2. Since the strength of the flexible cover plate 2 of the folding product is relatively poor, the long-term presence of bubbles B will cause dents and other poor appearance on the surface of the flexible cover plate 2, and even affect the display effect.

[0048] The protection structure, OLED folding display module and display device provided in this application are intended to solve the above technical problems of the prior art.

[0049] The embodiment of the present application provides a protection structure for protecting a flexible cover plate of an OLED display panel. Figure 2 As shown, the protection structure 3 provided in this embodiment includes a protection film 301 , an air-conducting adhesive layer 302 and a release layer 303 .

[0050] The air-conducting adhesive layer 302 is located on one side of the protective film 301 and has a patterned air-conducting groove 3021 . The release layer 303 is located on the side of the air-conducting adhesive layer 302 away from the protective film 301 .

[0051] Specifically, Figure 2 As shown, the thickness of the air-conducting adhesive layer 302 is 8 μm to 15 μm. Further, the thickness of the air-conducting adhesive layer 302 is 10 μm.

[0052] Specifically, Figure 2 As shown, the distance between adjacent gas guide grooves is 0.5 mm to 3 mm, so as to ensure that the gas can be fully discharged and the protective structure 3 can have a good protective effect.

[0053] Specifically, Figure 2 As shown, the material of the air-conducting adhesive layer 302 is silicone, acrylic adhesive, PU adhesive (polyurethane resin) or optical adhesive.

[0054] Specifically, Figures 3 to 5 As shown, in the protection structure 3 provided in this embodiment, the patterned gas guide groove 3021 can be designed to have different shapes. The shape of the patterned gas guide groove 3201 is described in detail below.

[0055] In a specific embodiment, Figure 3As shown, the patterned gas guide groove 3021 is a grid-shaped gas guide groove. The grid-shaped gas guide groove includes a first gas guide groove 3021a extending along a first direction and a second gas guide groove 3021b extending along a second direction, and the first gas guide groove 3021a and the second gas guide groove 3021b intersect to form a grid. In this embodiment, the distance between adjacent patterned gas guide grooves 3021 is divided into a distance d1 between adjacent first gas guide grooves 3021a and a distance d2 between adjacent second gas guide grooves 3021b, and both d1 and d2 are in the range of 0.5 mm to 3 mm.

[0056] In another specific embodiment, Figure 4 As shown, the patterned gas guide grooves 3021 are strip-shaped gas guide grooves. In this embodiment, the distance d3 between adjacent strip-shaped gas guide grooves is in the range of 0.5 mm to 3 mm.

[0057] In another specific embodiment, Figure 5 As shown, the patterned gas guiding grooves 3021 are wave-shaped gas guiding grooves. In this embodiment, the distance d4 between adjacent wave-shaped gas guiding grooves is in the range of 0.5 mm to 3 mm.

[0058] Specifically, Figure 6 As shown, a protrusion 3031 adapted to the patterned gas-conducting groove 3021 is provided on one side of the release layer 303 close to the gas-conducting adhesive layer 302. The protrusion 3031 can prevent the gas-conducting adhesive layers 302 on both sides of the patterned gas-conducting groove 3021 from adhering to each other. The release layer 303 provided with the protrusion 3031 can be used as a mold for forming the patterned gas-conducting groove 3021, that is, the liquid adhesive is coated on the protective film 301, and then the release layer 303 is provided on the liquid adhesive, and then the liquid adhesive is cured into an adhesive layer. The protrusion 3031 provided on the release layer 303 can form the patterned gas-conducting groove 3021 on the adhesive layer, that is, the adhesive layer is the gas-conducting adhesive layer 302. The function of the release layer 303 is to protect the gas-conducting adhesive layer 302 before the protective structure 3 is used, and the release layer 303 can be removed when the protective structure 3 is used.

[0059] The protective structure 3 provided in this embodiment is provided with a patterned gas guide groove 3021 on the gas guide adhesive layer 302. After the release layer 303 is removed from the protective structure 3 and the flexible cover plate of the display panel to be protected, the gas between the protective structure 3 and the flexible cover plate of the display panel can be discharged through the patterned gas guide groove 3021, thereby preventing the gas from existing between the protective structure 3 and the flexible cover plate 2 for a long time and forming bubbles, thereby avoiding the pressure of the bubbles on the flexible cover plate 2 and causing dents on the surface of the flexible cover plate 2 and other poor appearance and affecting the display effect.

[0060] Based on the same inventive concept, the present application embodiment also provides an OLED folding display module, such as Figure 7As shown, the OLED folding display module provided in this embodiment includes:

[0061] Display panel 1;

[0062] A flexible cover plate 2, located on one side of the light emitting surface of the display panel 1;

[0063] In the protective structure 3 after the release layer 303 is removed in the above embodiment, the air-conducting adhesive layer 302 is located between the protective film 301 and the flexible cover plate 2 and the air-conducting adhesive layer 302 is adhered to the flexible cover plate 2 .

[0064] The OLED folding display module provided in this embodiment includes the protective structure 3 in the above embodiment after the release layer is removed, and has the beneficial effects of the protective structure 3 in the above embodiment, which will not be repeated here.

[0065] Specifically, Figure 7 As shown, the OLED display panel 1 in this embodiment is an OLED foldable display panel.

[0066] Alternatively, if Figure 7 As shown, in the OLED foldable display module provided in this embodiment, the flexible cover plate 2 is a polyimide film, a polyethylene terephthalate film or an ultra-thin flexible glass. That is, the flexible cover plate 2 is a single-layer cover plate, and the protection structure 3 protects the flexible cover plate 2, which can not only prevent the flexible cover plate 2 from being scratched, but also discharge the gas between the flexible cover plate 2 and the protective film 301, and prevent the formation of bubbles between the protective film 301 and the flexible cover plate 2.

[0067] Alternatively, if Figure 8 As shown, in the OLED folding display module provided by this embodiment, the flexible cover plate 2 includes a first flexible cover plate layer 201, a second flexible cover plate layer 203, and an adhesive layer 202 located between the first flexible cover plate layer 201 and the second flexible cover plate layer 203; the first flexible cover plate layer 201 is a polyimide film, a polyethylene terephthalate film or an ultra-thin flexible glass, and the second flexible cover plate layer 203 is a polyimide film, a polyethylene terephthalate film or an ultra-thin flexible glass. Specifically, the material of the adhesive layer 202 is optical glue.

[0068] The flexible cover plate 2 in the OLED folding display module provided in this embodiment is a multi-layer structure, and the multi-layer structure of the flexible cover plate 2 has a strong protective effect on the display panel 1.

[0069] Furthermore, if Fig. 9As shown, the OLED foldable display module provided in this embodiment further includes a polarizer 4 and an optical adhesive layer 5; the polarizer 4 is located between the display panel 1 and the flexible cover plate 2; the optical adhesive layer 5 is located between the polarizer 4 and the flexible cover plate 2, and bonds the polarizer 4 to the flexible cover plate 2. The polarizer 4 is used to prevent reflection of ambient light, and the optical adhesive layer 5 is used to bond the polarizer 4 to the flexible cover plate 2.

[0070] Based on the same inventive concept, the present application also provides an OLED folding display device, such as Fig.10 As shown, the OLED folding display device provided in this embodiment includes the OLED folding display module in the above embodiment, and has the beneficial effects of the OLED folding display module in the above embodiment, which will not be repeated here.

[0071] Specifically, the OLED folding display device provided in this embodiment is a foldable mobile phone, etc.

[0072] Specifically, the OLED folding display device provided in this embodiment also includes a driving chip and a power supply, wherein the driving chip provides a driving signal for the display panel, and the power supply provides electrical energy for the OLED display panel.

[0073] By applying the embodiments of the present application, at least the following beneficial effects can be achieved:

[0074] The embodiments of the present application provide a protective structure, an OLED folding display module and a display device. A patterned air guide groove is provided on the air guide adhesive layer in the protective structure. After the release layer of the protective structure is removed and bonded to the flexible cover plate of the display panel to be protected, the gas between the protective structure and the flexible cover plate of the display panel can be discharged through the patterned air guide groove, thereby preventing the gas from existing between the protective structure and the flexible cover plate for a long time to form bubbles, thereby avoiding the pressure of the bubbles on the flexible cover plate to cause dents on the surface of the flexible cover plate and other poor appearance and affecting the display effect.

[0075] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0076] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0077] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0078] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0079] The above are only some implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. An OLED foldable display module, characterized in that: include: Display panel; A flexible cover plate, located on one side of the light emitting surface of the display panel, wherein the flexible cover plate is a single-layer cover plate, or the flexible cover plate includes a first flexible cover plate layer, a second flexible cover plate layer, and an adhesive layer located between the first flexible cover plate layer and the second flexible cover plate layer; A protective structure, comprising a protective film, an air-conducting adhesive layer and a release layer, wherein the air-conducting adhesive layer is located on one side of the protective film and has a patterned air-conducting groove, and the patterned air-conducting groove runs through the air-conducting adhesive layer; the release layer is located on a side of the air-conducting adhesive layer away from the protective film, and a protrusion adapted to the patterned air-conducting groove is provided on a side of the release layer close to the air-conducting adhesive layer, and the protrusion is used to prevent the air-conducting adhesive layers on both sides of the patterned air-conducting groove from adhering to each other; Among them, after the release layer is removed, the air-conducting adhesive layer in the protective structure is adhered to the flexible cover plate, so that the air-conducting adhesive layer is located between the protective film and the flexible cover plate, so that the gas between the protective structure and the flexible cover plate can be discharged through the air-conducting groove.

2. The OLED foldable display module according to claim 1, characterized in that: The patterned air guide grooves are grid-shaped air guide grooves, strip-shaped air guide grooves or wave-shaped air guide grooves.

3. The OLED foldable display module according to claim 1, characterized in that: The thickness of the air-conducting adhesive layer is 8 μm to 15 μm.

4. The OLED foldable display module according to claim 1, characterized in that: The distance between adjacent patterned air guide grooves is 0.5 mm to 3 mm.

5. The OLED foldable display module according to claim 1, characterized in that: The single-layer cover plate is a polyimide film, a polyethylene terephthalate film or an ultra-thin flexible glass.

6. The OLED foldable display module according to claim 1, characterized in that: The first flexible cover layer is a polyimide film, a polyethylene terephthalate film or an ultra-thin flexible glass, and the second flexible cover layer is a polyimide film, a polyethylene terephthalate film or an ultra-thin flexible glass.

7. The OLED foldable display module according to any one of claims 5 to 6, characterized in that: Also includes: A polarizer, located between the display panel and the flexible cover plate; The optical adhesive layer is located between the polarizer and the flexible cover plate, and bonds the polarizer to the flexible cover plate.

8. An OLED foldable display device, characterized in that: An OLED folding display module comprising any one of claims 1-7.

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