Packaging film of OLED display device
By introducing a thermal conductive layer and an outer thermal insulation layer into the packaging film of OLED display devices, the curling problem caused by uneven heat in the packaging film is solved, and a more uniform temperature management and better adhesion effect is achieved.
Patent Information
- Application Number
- CN202422072688.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-08-26
AI Technical Summary
The packaging film of OLED display devices is unevenly heated, resulting in the problem of film curling.
A packaging film for OLED display devices is designed, including a puncture-proof protective layer, a voltage partial buffer layer, an outer thermal insulation layer and a thermal conductivity layer. The thermally conductive layer is fixedly connected to the metal frame of the OLED display device, and conducts temperature to the metal frame for heat dissipation; the outer thermally insulation layer is insulated with nano transparent thermally insulated coating to prevent the local temperature of the packaging film from rising.
It effectively avoids local overheating of OLED display devices and curling of packaging films, and improves the adhesion effect between OLED display devices and packaging films.
Smart Images
Figure CN222954331U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of packaging films, in particular to a packaging film of an OLED display device. Background Art
[0002] The encapsulation film of OLED display devices is a key component used to protect OLED devices. The main function of the encapsulation film is to block the entry of water, oxygen and other substances that may damage OLED display devices, thereby improving the stability and life of OLED display devices. The encapsulation film material of OLED display devices is usually composed of inorganic and organic multilayer composite structures.
[0003] Since the encapsulation film of OLED display devices is usually composed of a multi-layer inorganic and organic composite structure that is overlapped and combined together, and since the OLED display device generates heat when working and since the heating parts of the display are located unevenly, the heating temperatures at different positions of the OLED display device are different, which will cause uneven heating at different positions of the encapsulation film, causing the film to curl. Utility Model Content
[0004] The utility model aims to provide a packaging film for an OLED display device in view of the problem that the packaging film in the background technology is unevenly heated and curls.
[0005] The technical solution of the utility model is: an encapsulation film of an OLED display device, comprising: an anti-puncture protection layer, a pressure-dividing buffer layer is laid on the lower surface of the anti-puncture protection layer, an external heat-insulating layer is laid on the lower surface of the pressure-dividing buffer layer, a heat-conducting layer is laid on the lower surface of the external heat-insulating layer, the heat-conducting layer is laid on the surface of the OLED display device, and the edge of the heat-conducting layer is fixedly connected to the metal frame of the OLED display device.
[0006] Optionally, the shape of the outer heat insulation layer is the same as that of the heat conductive layer, the shape of the anti-puncture protection layer is the same as that of the pressure dividing buffer layer, and the area of the pressure dividing buffer layer is smaller than that of the outer heat insulation layer.
[0007] Optionally, the heat-conducting layer is made of a transparent graphene heat-conducting film, and the thickness of the heat-conducting layer is between 0.15 mm and 0.7 mm.
[0008] Optionally, the outer heat insulation layer is made of polyethylene terephthalate film, and the surface of the outer heat insulation layer is coated with nano transparent heat insulation coating.
[0009] Optionally, a water-blocking layer is laid on the upper surface of the anti-puncture protective layer, and an antistatic protective film is laid on the upper surface of the water-blocking layer. The antistatic protective film is a thin sheet formed of polycarbonate, and the water-blocking layer is an aluminum-plated polyethylene terephthalate film.
[0010] Optionally, the shape of the antistatic protective film is the same as that of the outer heat insulation layer, the area of the anti-puncture protective layer is smaller than the area of the water-blocking layer, and the area of the antistatic protective film is smaller than the area of the antistatic protective film.
[0011] Optionally, the water-blocking layer covers the anti-puncture protective layer and the pressure-sharing buffer layer, the bottom of the water-blocking layer and near the edge are bonded to the outer insulation layer, and the bottom of the antistatic protective film and near the edge are bonded to the outer insulation layer.
[0012] Optionally, the anti-puncture protection layer is made of a high-permeability polyvinyl chloride film, and the pressure-dividing buffer layer is made of polyethylene terephthalate.
[0013] Compared with the prior art, the present invention has at least one of the following beneficial technical effects:
[0014] When the local temperature of the OLED display device is high, the utility model conducts heat through the OLED display device and transfers the temperature to the metal frame of the OLED display device to avoid overheating of the local sealing of the OLED display device. At the same time, the external heat insulation layer is used for heat insulation to avoid excessive local temperature of the OLED display device and prevent the local temperature of the packaging film from rising and curling of the film.
[0015] Furthermore, when the antistatic protective film is adhered to the outer insulation layer, the edge of the antistatic protective film is bent to form an arch, and the arch is covered with glue, thereby increasing the contact area between the glue and the packaging film, thereby improving the adhesion effect between the OLED display device and the packaging film. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0017] Figure 2 for Figure 1 Schematic diagram of the left side cross-section.
[0018] Figure numerals: 1. antistatic protective film; 2. water-blocking layer; 3. anti-puncture protective layer; 4. pressure-dividing buffer layer; 5. external heat-insulating layer; 6. heat-conducting layer. DETAILED DESCRIPTION
[0019] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.
[0020] The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.
[0021] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.
[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected 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 the present invention can be understood according to specific circumstances.
[0024] Example
[0025] This embodiment provides a packaging film of an OLED display device, such as Figure 1 As shown, it includes an anti-puncture protection layer 3, the anti-puncture protection layer 3 is made of a high-permeability polyvinyl chloride film, and a pressure-dividing buffer layer 4 is laid on the lower surface of the anti-puncture protection layer 3, and the pressure-dividing buffer layer 4 is made of polyethylene terephthalate.
[0026] The high-transmittance polyvinyl chloride film has the characteristics of high mechanical strength and good chemical corrosion resistance. The anti-puncture protective layer 3 serves as the middle layer of the packaging film to provide support for the packaging film as a whole. At the same time, the high-transmittance polyvinyl chloride film has high mechanical strength. When the OLED display device is subjected to external force, the anti-puncture protective layer 3 prevents the pressure-dividing buffer layer 4 from being pierced. At the same time, the pressure-dividing buffer layer 4 performs buffering to share the impact force on the anti-puncture protective layer 3 to protect the OLED display device.
[0027] The lower surface of the pressure-dividing buffer layer 4 is paved with an outer heat-insulating layer 5, which is made of polyethylene terephthalate film. The surface of the outer heat-insulating layer 5 is coated with nano-transparent heat-insulating paint. The polyethylene terephthalate film and the nano-transparent heat-insulating paint cooperate to achieve a heat-insulating effect.
[0028] The lower surface of the outer heat insulation layer 5 is paved with a heat-conducting layer 6, and the heat-conducting layer 6 is made of a transparent graphene heat-conducting film, and the thickness of the heat-conducting layer 6 is between 0.15 mm and 0.7 mm. The graphene heat-conducting film has good thermal conductivity, and is laid on the surface of the OLED display device through the heat-conducting layer 6. The edge of the heat-conducting layer 6 is fixedly connected to the metal frame of the OLED display device. When the local temperature of the OLED display device is high, heat is conducted through the OLED display device. Since the edge of the heat-conducting layer 6 is connected to the metal frame of the OLED display device, the heat-conducting layer 6 transfers the temperature to the metal frame, and the good heat dissipation of the metal frame is used to dissipate the heat of the OLED display device, thereby avoiding excessive local temperature of the OLED display device, and also preventing the local temperature of the encapsulation film from rising, and the film from curling.
[0029] At the same time, since the thermal conductive layer 6 is laid on the lower surface of the external thermal insulation layer 5, the thermal conductive layer 6 is isolated from the pressure dividing buffer layer 4 by the external thermal insulation layer 5, thereby preventing the temperature from being transferred to the pressure dividing buffer layer 4, resulting in a large temperature difference between one side of the pressure dividing buffer layer 4 close to the display and the other side, causing the pressure dividing buffer layer 4 to curl.
[0030] The upper surface of the anti-puncture protective layer 3 is paved with a water-blocking layer 2, and the upper surface of the water-blocking layer 2 is paved with an antistatic protective film 1. The antistatic protective film 1 is a thin sheet formed of polycarbonate. The antistatic protective film 1 has an antistatic effect to prevent static electricity from adsorbing dust, causing dust to block the picture displayed by the OLED display device and affect the viewing of the OLED display device.
[0031] The water-blocking layer 2 is made of a polyethylene terephthalate (PET) aluminized film, which has good water-blocking and oxygen-blocking characteristics. The water-blocking layer 2 blocks water and oxygen, thereby increasing the service life of the OLED display device.
[0032] The shape of the antistatic protective film 1, the shape of the outer heat-insulating layer 5 and the shape of the heat-conducting layer 6 are the same, the shape of the anti-puncture protective layer 3 and the shape of the pressure-dividing buffer layer 4 are the same, the area of the anti-puncture protective layer 3 is smaller than the area of the water-blocking layer 2, which is smaller than the area of the antistatic protective film 1. The anti-puncture protective layer 3 and the pressure-dividing buffer layer 4 are coated by the water-blocking layer 2 and the outer heat-insulating layer 5, the bottom of the water-blocking layer 2 and near the edge are bonded to the outer heat-insulating layer 5, and the bottom of the antistatic protective film 1 and near the edge are bonded to the outer heat-insulating layer 5.
[0033] The antistatic protective film 1 and the water-blocking layer 2 shield the sides of the anti-puncture protective layer 3 and the pressure-dividing buffer layer 4, preventing moisture in the air from entering from the sides of the anti-puncture protective layer 3 and the pressure-dividing buffer layer 4, causing gas to enter the gap between the anti-puncture protective layer 3 and the pressure-dividing buffer layer 4. At the same time, since the anti-puncture protective layer 3 and the pressure-dividing buffer layer 4 exist between the antistatic protective film 1 and the outer heat-insulating layer 5, when the antistatic protective film 1 is adhered to the outer heat-insulating layer 5, the edge of the antistatic protective film 1 is bent to form an arch, and the arch is covered with glue, thereby increasing the contact area between the glue and the encapsulation film, so as to improve the adhesion effect between the OLED display device and the encapsulation film.
[0034] In this embodiment, when the local temperature of the OLED display device is high, heat is conducted through the OLED display device and the temperature is transferred to the metal frame of the OLED display device to avoid local overheating of the OLED display device. At the same time, the external insulation layer 5 is used for heat insulation to avoid the local temperature of the OLED display device being too high, and to prevent the local temperature of the packaging film from rising and curling of the film.
[0035] The above-mentioned specific embodiments are only several optional embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.
Claims
1. An encapsulation film for an OLED display device, characterized in that: include: An anti-puncture protective layer (3), a pressure-dividing buffer layer (4) is laid on the lower surface of the anti-puncture protective layer (3), an external heat-insulating layer (5) is laid on the lower surface of the pressure-dividing buffer layer (4), a heat-conducting layer (6) is laid on the lower surface of the external heat-insulating layer (5), the heat-conducting layer (6) is laid on the surface of the OLED display device, and the edge of the heat-conducting layer (6) is fixedly connected to the metal frame of the OLED display device.
2. The encapsulation film of an OLED display device according to claim 1, characterized in that: The shape of the outer heat insulation layer (5) is the same as that of the heat conducting layer (6), the shape of the anti-puncture protection layer (3) is the same as that of the pressure dividing buffer layer (4), and the area of the pressure dividing buffer layer (4) is smaller than that of the outer heat insulation layer (5).
3. The encapsulation film of an OLED display device according to claim 1, characterized in that: The heat-conducting layer (6) is made of a transparent graphene heat-conducting film, and the thickness of the heat-conducting layer (6) is between 0.15 mm and 0.7 mm.
4. The encapsulation film of an OLED display device according to claim 1, characterized in that: The outer heat insulation layer (5) is made of polyethylene terephthalate film, and the surface of the outer heat insulation layer (5) is coated with nano transparent heat insulation paint.
5. The encapsulation film of an OLED display device according to claim 4, characterized in that: The upper surface of the anti-puncture protective layer (3) is provided with a water-blocking layer (2), and the upper surface of the water-blocking layer (2) is provided with an antistatic protective film (1), wherein the antistatic protective film (1) is a thin sheet formed of polycarbonate, and the water-blocking layer (2) is a polyethylene terephthalate aluminum-plated film.
6. The encapsulation film of an OLED display device according to claim 5, characterized in that: The shape of the antistatic protective film (1) is the same as that of the outer heat insulation layer (5), the area of the anti-puncture protective layer (3) is smaller than the area of the water-blocking layer (2), which is smaller than the area of the antistatic protective film (1).
7. The encapsulation film of an OLED display device according to claim 6, characterized in that: The water-blocking layer (2) covers the anti-puncture protective layer (3) and the pressure-dividing buffer layer (4); the bottom of the water-blocking layer (2) and near the edge are bonded to the outer heat-insulating layer (5); the bottom of the antistatic protective film (1) and near the edge are bonded to the outer heat-insulating layer (5).
8. The encapsulation film of an OLED display device according to claim 7, characterized in that: The anti-puncture protection layer (3) is made of a high-permeability polyvinyl chloride film, and the pressure-dividing buffer layer (4) is made of a polyethylene terephthalate film.