CN114627768B - Flexible OLED display module, manufacturing method and terminal equipment - Google Patents
Flexible OLED display module, manufacturing method and terminal equipment Download PDFInfo
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Classifications
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- G—PHYSICS
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- 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
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- G—PHYSICS
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- 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
- G09F9/33—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 being semiconductor devices, e.g. diodes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The application provides a flexible OLED display module, a manufacturing method and terminal equipment. The flexible OLED display module comprises a heat dissipation support substrate, an adhesive layer and a flexible OLED substrate. The heat dissipation support substrate comprises a metal support substrate and a heat dissipation coating coated on the metal support substrate, wherein the adhesive layer is adhered to the heat dissipation coating, and the flexible OLED substrate is adhered to the adhesive layer. That is, the heat dissipation coating with the heat dissipation function is coated on the metal support substrate, so that the heat dissipation coating and the metal support substrate are integrated into a whole to form the heat dissipation support substrate, and the heat dissipation support substrate also has the heat dissipation function. Compared with the prior art, the metal heat dissipation film is attached between the flexible OLED substrate and the adhesive layer, the heat dissipation coating of the application only needs one coating process, two film pasting processes are not needed, equipment investment and module cost can be reduced, and the thickness of the heat dissipation coating is thinner than that of the metal heat dissipation film of the prior art, so that the overall thickness of the flexible OLED display module can be reduced.
Description
Technical Field
The application relates to the technical field of display devices, in particular to a flexible OLED display module, a manufacturing method and terminal equipment.
Background
The electroluminescent diode (OLED) has advantages of simple manufacturing process, low cost, high luminous efficiency, easy formation of flexible structure, low power consumption, high color saturation, wide viewing angle, etc., and the display technology using the electroluminescent diode has become an important display technology.
An OLED is a current-type light emitting device that mainly includes an anode, a cathode, and an organic material functional layer. The main working principle of the OLED is as follows: the organic material functional layer emits light by carrier injection and recombination under the drive of an electric field formed by the anode and the cathode.
In the manufacturing process of the flexible OLED display module, a metal supporting substrate (meatall) is usually attached to the flexible OLED substrate through an adhesive layer, so as to improve flatness, and meanwhile, the flexible OLED substrate is prevented from being scratched by a mechanism part in the mounting process. In order to ensure the supportability of the metal supporting substrate, the metal supporting substrate is usually made of an alloy material, but the existing alloy material does not have a heat dissipation function, so that a layer of metal heat dissipation film is attached between the flexible OLED substrate and the adhesive layer in the prior art, however, two film attaching processes are required for attaching the metal heat dissipation film to the adhesive layer, namely, a first film attaching process is performed to attach the metal heat dissipation film to the flexible OLED substrate, and a second film attaching process is performed to attach the metal heat dissipation film to the flexible OLED substrate, so that equipment investment and module cost are high, and the overall thickness of the flexible OLED display module is increased by the metal heat dissipation film, which is inconsistent with the light and thin development trend pursued in the industry at present.
Disclosure of Invention
The application provides a flexible OLED display module, a manufacturing method and terminal equipment, and aims to solve the problems that in the prior art, a metal heat dissipation film is attached between a flexible OLED substrate and an adhesive layer, two film attaching processes are needed, and the overall thickness of the flexible OLED display module is increased.
In a first aspect, the present application provides a flexible OLED display module, comprising:
the heat dissipation support substrate comprises a metal support substrate and a heat dissipation coating coated on the metal support substrate;
an adhesive layer adhered to the heat dissipation coating;
and the flexible OLED substrate is bonded with one side, far away from the heat dissipation coating, of the adhesive layer.
In some possible implementations, the material of the heat dissipation coating includes graphene and an adhesive, wherein the mass fraction of the graphene is above 60.
In some possible implementations, the heat-dissipating coating further includes a resin, wherein the resin is a mixture of one or more of an epoxy resin, a polyester resin, a polyurethane resin, an alkyd resin, an acrylic resin, a silicone resin, a fluorocarbon resin, a vinyl resin, a nitrocellulose resin, and a vinyl chloride resin.
In some possible implementations, the heat-dissipating coating includes a coating body and a plurality of heat-dissipating particles doped in the coating body.
In some possible implementations, the adhesive layer is an optical adhesive layer.
In a second aspect, the application further provides a terminal device, including the flexible OLED display module.
In a third aspect, the present application further provides a method for manufacturing a flexible OLED display module, including:
coating a heat dissipation coating on a metal support substrate;
bonding an adhesive layer on the heat dissipation coating;
and bonding a flexible OLED substrate on one side of the adhesive layer away from the heat dissipation coating.
In some possible implementations, the heat dissipation coating includes graphene and an adhesive, wherein the mass fraction of the graphene is above 60.
In some possible implementations, the heat-dissipating coating further includes a resin, wherein the resin is a mixture of one or more of an epoxy resin, a polyester resin, a polyurethane resin, an alkyd resin, an acrylic resin, a silicone resin, a fluorocarbon resin, a vinyl resin, a nitrocellulose resin, and a vinyl chloride resin.
In some possible implementations, the heat-dissipating coating includes a coating body and a plurality of heat-dissipating particles doped in the coating body.
In some possible implementations, the adhesive layer is an optical adhesive layer.
The application provides a flexible OLED display module assembly includes heat dissipation supporting substrate, viscose layer and flexible OLED base plate. The heat dissipation support substrate comprises a metal support substrate and a heat dissipation coating coated on the metal support substrate, wherein the adhesive layer is adhered to the heat dissipation coating, and the flexible OLED substrate is adhered to one side of the adhesive layer away from the heat dissipation coating. The heat dissipation coating with the heat dissipation function is coated on the metal support substrate, so that the heat dissipation coating and the metal support substrate are integrated into a whole to form the heat dissipation support substrate, the heat dissipation support substrate also has the heat dissipation function, and the heat dissipation support substrate is bonded with the flexible OLED substrate through the adhesive layer to dissipate heat of the flexible OLED substrate. Compared with the prior art, a layer of metal heat dissipation film is attached between the flexible OLED substrate and the adhesive layer, the heat dissipation coating of the application only needs to be coated on the metal support substrate by one coating process, two film pasting processes are not needed, equipment investment and module manufacturing cost can be reduced, and the thickness of the heat dissipation coating is thinner than that of the metal heat dissipation film of the prior art, and the overall thickness of the flexible OLED display module can be reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a flexible OLED display module according to an embodiment of the present disclosure;
FIG. 2 is a flowchart of a method for manufacturing a flexible OLED display module according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a manufacturing method of a flexible OLED display module according to an embodiment of the disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
In this application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The following disclosure provides many different embodiments or examples for implementing different structures of the present application. In order to simplify the disclosure of the present application, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not in themselves indicate the relationship between the various embodiments-and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the application of other processes and/or the use of other materials.
Referring to fig. 1, an embodiment of the present application provides a flexible OLED display module, including:
a heat dissipation support substrate 1, the heat dissipation support substrate 1 including a metal support substrate 11 and a heat dissipation coating 12 coated on the metal support substrate 11;
an adhesive layer 2, the adhesive layer 2 being adhered to the heat-dissipating coating 12;
and the flexible OLED substrate 3 is adhered to the side, away from the heat dissipation coating 12, of the adhesive layer 2, and the flexible OLED substrate 3 is adhered to the side.
It should be noted that, in the present application, the heat dissipation coating 12 with a heat dissipation function is coated on the metal support substrate 11, so that the heat dissipation coating 12 and the metal support substrate 11 are integrated into a whole to form the heat dissipation support substrate 1, so that the heat dissipation support substrate 1 also has a heat dissipation function, and then the heat dissipation support substrate 1 is adhered to the flexible OLED substrate 3 through the adhesive layer 2, so as to dissipate heat of the flexible OLED substrate 3. Compared with the prior art, a layer of metal heat dissipation film is attached between the flexible OLED substrate 3 and the adhesive layer 2, the heat dissipation coating 12 of the application only needs to be coated on the metal support substrate 11 by one coating process, two film attaching processes are not needed, and equipment investment and module cost can be reduced.
In addition, the material of the metal heat dissipation film in the prior art is usually a copper film or an aluminum film, and the thickness of the copper film or the aluminum film is usually about 100 μm, so that the metal heat dissipation film has good heat dissipation capability, and the metal heat dissipation film is ensured not to be damaged in the film pasting process. The heat dissipation coating 12 is coated on the metal support substrate 11 through a coating process, a film pasting process is not needed, the thickness of the heat dissipation coating 12 is thinner than that of a metal heat dissipation film in the prior art, and the overall thickness of the flexible OLED display module can be reduced.
The application of the embodiment of the application to the flexible OLED display module is not particularly limited, and the application can be any product or component with a display function, such as a television, a notebook computer, a tablet personal computer, a wearable display device (such as a smart bracelet and a smart watch), a mobile phone, a virtual reality device, an augmented reality device, a vehicle-mounted display and an advertising lamp box.
In some embodiments, the material of the heat dissipation coating 12 includes graphene. Namely, graphene is arranged in the heat dissipation coating 12, and the flexible OLED substrate 3 is subjected to heat dissipation through the graphene. Compared with the metal heat dissipation film in the prior art, the graphene has high infrared emissivity, high heat conductivity and high specific surface area, so that the graphene has good heat dissipation performance, and the high specific surface area of the graphene is favorable for being fully dispersed in the coating, so that the heat dissipation area of the coating is increased, and the heat dissipation effect on the flexible OLED substrate 3 is improved.
In addition, graphene itself has excellent thermal stability, weather resistance, aging resistance, mechanical strength, and the like, to improve the service life of the heat dissipation coating 12.
In this embodiment, the heat dissipation coating 12 may include graphene and an adhesive. The mass portion of the graphene can be more than 60, so that the heat dissipation coating 12 has good heat dissipation capability. Of course, the heat dissipation coating 12 may further include resins, solvents and other additives, wherein the mass parts of the resins, solvents and additives may be specifically set according to practical situations, and the application is not limited herein.
In addition, the resin may be one or more of epoxy resin, polyester resin, polyurethane resin, alkyd resin, acrylic resin, silicone resin, fluorocarbon resin, vinyl resin, nitrocellulose resin, and vinyl chloride resin. Since the resin has the characteristics of strong adhesion, the graphene and the resin are crosslinked and cured, so that the heat dissipation performance of the heat dissipation coating 12 is further enhanced.
In other embodiments, the heat dissipation coating 12 may be other materials that can dissipate heat, which is not limited herein. For example: the heat dissipation coating 12 includes a coating body and a plurality of heat dissipation particles doped in the coating body, and the heat dissipation supporting substrate 1 can have a heat dissipation function through the plurality of heat dissipation particles so as to dissipate heat of the flexible OLED substrate 3. The heat dissipation particles can be heat conduction metal powder, carbon powder, copper powder and powdered graphite. The coating body may be an ink layer. The doping concentration and the doping amount of the heat dissipation particles in the coating body are set according to the specific materials of the selected doping particles, and the heat dissipation particles with different heat dissipation performances adopt different doping concentrations. In addition, in order to ensure more uniform heat dissipation performance, the heat dissipation particles are uniformly doped in the coating body.
In some embodiments, the thickness of the heat sink coating 12 is 40 μm-50 μm. When the thickness of the heat dissipation coating 12 is thinner, the heat dissipation capability of the OLED array substrate is limited, and when the thickness of the heat dissipation coating 12 is thicker, the thicker heat dissipation coating 12 has a certain sealing effect on the OLED array substrate, so that heat is accumulated in the heat dissipation coating 12 and is not beneficial to discharge, and when the temperature of the heat dissipation coating 12 is higher, the heat dissipation of the OLED array substrate cannot be accelerated. Therefore, the thickness of the heat dissipation coating 12 is 40-50 μm, heat cannot be accumulated in the heat dissipation coating 12, and the heat dissipation capability of the OLED array substrate can be improved.
In addition, in order to ensure the heat dissipation capability of the metal heat dissipation film of the prior art, the thickness of the metal heat dissipation film of the prior art is generally 100 μm, and the heat dissipation capability of the heat dissipation coating 12 of the present application is better than that of the metal heat dissipation film, so that on the premise of the same heat dissipation capability, the thickness of the heat dissipation coating 12 of the present application is thinner than that of the metal heat dissipation film of the prior art, and even only half of that of the metal heat dissipation film of the prior art is used for reducing the overall thickness of the flexible OLED display module.
In some embodiments, the adhesive layer 2 is an optical adhesive layer. The optical cement has high transmittance (more than 95%), so that the transmittance of the flexible OLED display module is improved, and the product quality of the flexible OLED display module is improved. Of course, the heat dissipation support substrate 1 and the flexible OLED substrate 3 may be adhered by other adhesive materials, such as heat sensitive adhesive, which is not limited herein.
In some embodiments, referring to fig. 1, the flexible OLED display module further includes a support film 4, where the support film 4 is located between the adhesive layer 2 and the flexible OLED substrate 3, and the adhesive layer 2 and the flexible OLED substrate 3 are respectively connected to two sides of the support film 4. The support film 4 can further support not only the flexible OLED substrate 3 (e.g., a flexible substrate supporting the flexible OLED substrate 3) but also protect the flexible OLED substrate 3.
In this embodiment, the support film 4 may be Polyimide (PI), polyethylene terephthalate (PET), polyvinyl alcohol, triacetyl cellulose or a release film, and of course, the support film 4 may be made of other materials, which is not limited herein.
In some embodiments, referring to fig. 1, the flexible OLED display module further includes a circular polarizer 5 connected to a side of the flexible OLED substrate 3 away from the heat dissipation support substrate 1. The circular polarizer 5 includes a linear polarizer and a quarter wave plate, and due to the metal electrode structure in the flexible OLED substrate 3, reflection occurs under external strong light, which affects the display effect and contrast, so that the circular polarizer 5 changes the external incident ambient light into reflected light perpendicular to the polarization direction of the linear polarizer after passing through the linear polarizer and the quarter wave plate, thereby being blocked by the linear polarizer, and further avoiding the influence of the ambient light on the display effect and contrast.
In some embodiments, the flexible OLED substrate 3 may include a flexible substrate, a TFT (thin film transistor) array substrate provided on the flexible substrate, a plurality of OLEDs provided on the TFT array substrate, and a thin film encapsulation layer sealing the plurality of OLEDs.
The TFT array substrate comprises an active layer, a first metal layer, a second metal layer, an interlayer dielectric layer and the like. The first metal layer may include a gate electrode, and the second metal layer may include a source electrode and a drain electrode connected to the gate electrode.
Each OLED includes an anode, a cathode, and a functional layer of organic material. The anode is connected with the drain electrode. The organic material functional layer includes a hole injection layer, a hole transport layer, a light emitting layer, and an electron transport layer, which are sequentially stacked in a direction away from the TFT array substrate.
In some embodiments, the material of the metal support base 11 is an alloy material (such as stainless steel), so that the metal support base 11 has sufficient support property when the thickness is very thin and can be bent.
Based on the flexible OLED display module, the embodiment of the application also provides terminal equipment, including the flexible OLED display module.
The terminal device can be any product or component with display function, such as a television, a notebook computer, a tablet personal computer, a wearable display device (such as a smart bracelet, a smart watch and the like), a mobile phone, a virtual reality device, an augmented reality device, a vehicle-mounted display, an advertising lamp box and the like.
Referring to fig. 2 and fig. 3, based on the above-mentioned flexible OLED display module, the embodiment of the present application further provides a method for manufacturing a flexible OLED display module, including:
step S1, coating a heat dissipation coating 12 on a metal support substrate 11;
step S2, bonding an adhesive layer 2 on the heat dissipation coating 12;
and step S3, bonding the flexible OLED substrate 3 on the side of the adhesive layer 2 away from the heat dissipation coating 12.
It should be noted that, in the present application, the heat dissipation coating 12 with a heat dissipation function is coated on the metal support substrate 11, so that the heat dissipation coating 12 and the metal support substrate 11 are integrated into a whole to form the heat dissipation support substrate 1, so that the heat dissipation support substrate 1 also has a heat dissipation function, and then the heat dissipation support substrate 1 is adhered to the flexible OLED substrate 3 through the adhesive layer 2, so as to dissipate heat of the flexible OLED substrate 3. Compared with the prior art, a layer of metal heat dissipation film is attached between the flexible OLED substrate 3 and the adhesive layer 2, the heat dissipation coating 12 of the application only needs to be coated on the metal support substrate 11 by one coating process, two film attaching processes are not needed, and equipment investment and module cost can be reduced.
In addition, the material of the metal heat dissipation film in the prior art is usually a copper film or an aluminum film, and the thickness of the copper film or the aluminum film is usually about 100 μm, so that the metal heat dissipation film has good heat dissipation capability, and the metal heat dissipation film is ensured not to be damaged in the film pasting process. The heat dissipation coating 12 is coated on the metal support substrate 11 through a coating process, a film pasting process is not needed, the thickness of the heat dissipation coating 12 is thinner than that of a metal heat dissipation film in the prior art, and the overall thickness of the flexible OLED display module can be reduced.
In some embodiments, the material of the heat dissipation coating 12 includes graphene. Namely, graphene is arranged in the heat dissipation coating 12, and the flexible OLED substrate 3 is subjected to heat dissipation through the graphene. Compared with the metal heat dissipation film in the prior art, the graphene has high infrared emissivity, high heat conductivity and high specific surface area, so that the graphene has good heat dissipation performance, and the high specific surface area of the graphene is favorable for being fully dispersed in the coating, so that the heat dissipation area of the coating is increased, and the heat dissipation effect on the flexible OLED substrate 3 is improved.
In addition, graphene itself has excellent thermal stability, weather resistance, aging resistance, mechanical strength, and the like, to improve the service life of the heat dissipation coating 12.
In this embodiment, the heat dissipation coating 12 may include graphene and an adhesive. The mass portion of the graphene can be more than 60, so that the heat dissipation coating 12 has good heat dissipation capability. Of course, the heat dissipation coating 12 may further include resins, solvents and other additives, wherein the mass parts of the resins, solvents and additives may be specifically set according to practical situations, and the application is not limited herein.
In addition, the resin may be one or more of epoxy resin, polyester resin, polyurethane resin, alkyd resin, acrylic resin, silicone resin, fluorocarbon resin, vinyl resin, nitrocellulose resin, and vinyl chloride resin. Since the resin has the characteristics of strong adhesion, the graphene and the resin are crosslinked and cured, so that the heat dissipation performance of the heat dissipation coating 12 is further enhanced.
In other embodiments, the heat dissipation coating 12 may be other materials that can dissipate heat, which is not limited herein. For example: the heat dissipation coating 12 includes a coating body and a plurality of heat dissipation particles doped in the coating body, and the heat dissipation supporting substrate 1 can have a heat dissipation function through the plurality of heat dissipation particles so as to dissipate heat of the flexible OLED substrate 3. The heat dissipation particles can be heat conduction metal powder, carbon powder, copper powder and powdered graphite. The coating body may be an ink layer. The doping concentration and the doping amount of the heat dissipation particles in the coating body are set according to the specific materials of the selected doping particles, and the heat dissipation particles with different heat dissipation performances adopt different doping concentrations. In addition, in order to ensure more uniform heat dissipation performance, the heat dissipation particles are uniformly doped in the coating body.
In some embodiments, the thickness of the heat sink coating 12 is 40 μm-50 μm. When the thickness of the heat dissipation coating 12 is thinner, the heat dissipation capability of the OLED array substrate is limited, and when the thickness of the heat dissipation coating 12 is thicker, the thicker heat dissipation coating 12 has a certain sealing effect on the OLED array substrate, so that heat is accumulated in the heat dissipation coating 12 and is not beneficial to discharge, and when the temperature of the heat dissipation coating 12 is higher, the heat dissipation of the OLED array substrate cannot be accelerated. Therefore, the thickness of the heat dissipation coating 12 is 40-50 μm, heat cannot be accumulated in the heat dissipation coating 12, and the heat dissipation capability of the OLED array substrate can be improved.
In addition, in order to ensure the heat dissipation capability of the metal heat dissipation film of the prior art, the thickness of the metal heat dissipation film of the prior art is generally 100 μm, and the heat dissipation capability of the heat dissipation coating 12 of the present application is better than that of the metal heat dissipation film, so that on the premise of the same heat dissipation capability, the thickness of the heat dissipation coating 12 of the present application is thinner than that of the metal heat dissipation film of the prior art, and even only half of that of the metal heat dissipation film of the prior art is used for reducing the overall thickness of the flexible OLED display module.
In some embodiments, the adhesive layer 2 is an optical adhesive layer. The optical cement has high transmittance (more than 95%), so that the transmittance of the flexible OLED display module is improved, and the product quality of the flexible OLED display module is improved. Of course, the heat dissipation support substrate 1 and the flexible OLED substrate 3 may be adhered by other adhesive materials, such as heat sensitive adhesive, which is not limited herein.
In some embodiments, referring to fig. 3, before the flexible OLED substrate 3 is bonded on the side of the adhesive layer 2 away from the heat dissipation coating 12 in step S3, the method for manufacturing the flexible OLED display module further includes: a support film 4 is made on the side of the flexible OLED substrate 3 close to the adhesive layer 2. Step S3 is to bond the support film 4 on the side of the adhesive layer 2 away from the heat dissipation coating 12, i.e. the support film 4 is located between the adhesive layer 2 and the flexible OLED substrate 3, and the adhesive layer 2 and the flexible OLED substrate 3 are respectively connected to two sides of the support film 4. The support film 4 can further support not only the flexible OLED substrate 3 (e.g., a flexible substrate supporting the flexible OLED substrate 3) but also protect the flexible OLED substrate 3.
In this embodiment, the support film 4 may be Polyimide (PI), polyethylene terephthalate (PET), polyvinyl alcohol, triacetyl cellulose or a release film, and of course, the support film 4 may be made of other materials, which is not limited herein.
In some embodiments, referring to fig. 2 and 3, the method for manufacturing the flexible OLED display module further includes: in step S4, a circular polarizer 5 is fabricated on the side of the flexible OLED substrate 3 away from the heat dissipation supporting substrate 1. The circular polarizer 5 includes a linear polarizer and a quarter wave plate, and due to the metal electrode structure in the flexible OLED substrate 3, reflection occurs under external strong light, which affects the display effect and contrast, so that the circular polarizer 5 changes the external incident ambient light into reflected light perpendicular to the polarization direction of the linear polarizer after passing through the linear polarizer and the quarter wave plate, thereby being blocked by the linear polarizer, and further avoiding the influence of the ambient light on the display effect and contrast.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments. In the implementation, each unit or structure may be implemented as an independent entity, or may be implemented as the same entity or several entities in any combination, and the implementation of each unit or structure may be referred to the foregoing method embodiments and will not be repeated herein.
The flexible OLED display module, the manufacturing method and the terminal device provided by the embodiments of the present application are described in detail, and specific examples are applied to illustrate the principles and implementations of the embodiments of the present application, where the illustration of the above embodiments is only used to help understand the technical solutions and core ideas of the embodiments of the present application; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (9)
1. A flexible OLED display module, comprising:
the heat dissipation support substrate comprises a metal support substrate and a heat dissipation coating directly coated on the metal support substrate;
an adhesive layer adhered to the heat dissipation coating; the material of the heat dissipation coating comprises graphene, resin and an adhesive, wherein the mass part of the graphene is more than 60;
and the flexible OLED substrate is bonded with one side, far away from the heat dissipation coating, of the adhesive layer.
2. The flexible OLED display module of claim 1, wherein the resin is one or more of epoxy, polyester, polyurethane, alkyd, acrylic, silicone, fluorocarbon, vinyl, nitrocellulose, and vinyl chloride.
3. The flexible OLED display module of claim 1, wherein the heat-dissipating coating includes a coating body and a plurality of heat-dissipating particles doped in the coating body.
4. The flexible OLED display module of claim 1, wherein the adhesive layer is an optical adhesive layer.
5. A terminal device, comprising: the flexible OLED display module of any one of claims 1 to 4.
6. The manufacturing method of the flexible OLED display module is characterized by comprising the following steps of:
directly coating a heat dissipation coating on a metal support substrate; the heat dissipation coating comprises graphene, resin and an adhesive, wherein the mass part of the graphene is more than 60;
bonding an adhesive layer on the heat dissipation coating;
and bonding a flexible OLED substrate on one side of the adhesive layer away from the heat dissipation coating.
7. The method for manufacturing a flexible OLED display module according to claim 6, wherein the resin is one or more of epoxy resin, polyester resin, polyurethane resin, alkyd resin, acrylic resin, silicone resin, fluorocarbon resin, vinyl resin, nitrocellulose resin, and vinyl chloride resin.
8. The method of claim 6, wherein the heat dissipation coating comprises a coating body and a plurality of heat dissipation particles doped in the coating body.
9. The method of claim 6, wherein the adhesive layer is an optical adhesive layer.
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Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205303466U (en) * | 2016-01-15 | 2016-06-08 | 京东方科技集团股份有限公司 | Flexible display base plate, display device |
| CN106601928A (en) * | 2016-12-02 | 2017-04-26 | 深圳市华星光电技术有限公司 | Oled display device |
| CN108470855A (en) * | 2018-05-28 | 2018-08-31 | 京东方科技集团股份有限公司 | A kind of production method and flexible display apparatus of flexible display apparatus |
| CN109817829A (en) * | 2019-01-31 | 2019-05-28 | 武汉华星光电半导体显示技术有限公司 | Heat dissipation film and display panel |
| WO2019109200A1 (en) * | 2017-12-04 | 2019-06-13 | 东旭集团有限公司 | Upper substrate for miniature led component, miniature led component, and miniature led display device |
| CN110246880A (en) * | 2019-06-14 | 2019-09-17 | 武汉华星光电半导体显示技术有限公司 | The preparation method and display panel of display panel |
| CN110828530A (en) * | 2019-11-28 | 2020-02-21 | 武汉华星光电半导体显示技术有限公司 | Display panel, preparation method thereof and display device |
| CN110828700A (en) * | 2019-12-06 | 2020-02-21 | 中国乐凯集团有限公司 | Flexible packaging adhesive film for flexible OLED device |
| CN111105713A (en) * | 2019-12-20 | 2020-05-05 | 京东方科技集团股份有限公司 | Foldable display module, display device and heat dissipation method |
| CN111263568A (en) * | 2020-01-22 | 2020-06-09 | Oppo广东移动通信有限公司 | Heat dissipation material, preparation method thereof and electronic equipment |
| KR20210071497A (en) * | 2019-12-06 | 2021-06-16 | 주식회사 네패스 | Composite heat-radiating sheet capable of being made thin and having excellent flexibility, method for poducing the same, and mobile device including the same |
| CN113192419A (en) * | 2021-04-02 | 2021-07-30 | 武汉华星光电半导体显示技术有限公司 | Display module and display device |
| CN214477541U (en) * | 2021-03-17 | 2021-10-22 | Oppo广东移动通信有限公司 | Electronic equipment and display screen thereof |
| CN113594208A (en) * | 2021-07-08 | 2021-11-02 | 武汉华星光电半导体显示技术有限公司 | Flexible display device |
-
2022
- 2022-04-06 CN CN202210359264.0A patent/CN114627768B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205303466U (en) * | 2016-01-15 | 2016-06-08 | 京东方科技集团股份有限公司 | Flexible display base plate, display device |
| CN106601928A (en) * | 2016-12-02 | 2017-04-26 | 深圳市华星光电技术有限公司 | Oled display device |
| CN111357121A (en) * | 2017-12-04 | 2020-06-30 | 东旭集团有限公司 | Upper substrate for micro LED device, and micro LED display device |
| WO2019109200A1 (en) * | 2017-12-04 | 2019-06-13 | 东旭集团有限公司 | Upper substrate for miniature led component, miniature led component, and miniature led display device |
| CN108470855A (en) * | 2018-05-28 | 2018-08-31 | 京东方科技集团股份有限公司 | A kind of production method and flexible display apparatus of flexible display apparatus |
| CN109817829A (en) * | 2019-01-31 | 2019-05-28 | 武汉华星光电半导体显示技术有限公司 | Heat dissipation film and display panel |
| CN110246880A (en) * | 2019-06-14 | 2019-09-17 | 武汉华星光电半导体显示技术有限公司 | The preparation method and display panel of display panel |
| CN110828530A (en) * | 2019-11-28 | 2020-02-21 | 武汉华星光电半导体显示技术有限公司 | Display panel, preparation method thereof and display device |
| CN110828700A (en) * | 2019-12-06 | 2020-02-21 | 中国乐凯集团有限公司 | Flexible packaging adhesive film for flexible OLED device |
| KR20210071497A (en) * | 2019-12-06 | 2021-06-16 | 주식회사 네패스 | Composite heat-radiating sheet capable of being made thin and having excellent flexibility, method for poducing the same, and mobile device including the same |
| CN111105713A (en) * | 2019-12-20 | 2020-05-05 | 京东方科技集团股份有限公司 | Foldable display module, display device and heat dissipation method |
| CN111263568A (en) * | 2020-01-22 | 2020-06-09 | Oppo广东移动通信有限公司 | Heat dissipation material, preparation method thereof and electronic equipment |
| CN214477541U (en) * | 2021-03-17 | 2021-10-22 | Oppo广东移动通信有限公司 | Electronic equipment and display screen thereof |
| CN113192419A (en) * | 2021-04-02 | 2021-07-30 | 武汉华星光电半导体显示技术有限公司 | Display module and display device |
| CN113594208A (en) * | 2021-07-08 | 2021-11-02 | 武汉华星光电半导体显示技术有限公司 | Flexible display device |
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| Publication number | Publication date |
|---|---|
| CN114627768A (en) | 2022-06-14 |
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