CN110137376B - Display panel and preparation method thereof - Google Patents
Display panel and preparation method thereof Download PDFInfo
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- CN110137376B CN110137376B CN201910460384.8A CN201910460384A CN110137376B CN 110137376 B CN110137376 B CN 110137376B CN 201910460384 A CN201910460384 A CN 201910460384A CN 110137376 B CN110137376 B CN 110137376B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/844—Encapsulations
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/846—Passivation; Containers; Encapsulations comprising getter material or desiccants
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
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Abstract
The invention discloses a display panel and a preparation method thereof. The preparation method of the display panel comprises the following steps: forming an OLED device on a substrate; and forming a humidity sensing film capable of changing color according to humidity on one side of the substrate facing the OLED device. According to the preparation method, in the OLED packaging process, the humidity sensing film is formed on one side of the substrate, which faces the OLED device, and the color of the humidity sensing film can be changed according to the humidity. Therefore, in the packaging process, when the color of the humidity sensing film is recognized by naked eyes to change, the fact that water vapor invades in the packaging process can be known, bad products are monitored in real time, meanwhile, qualitative detection of humidity in the OLED packaging technological process is achieved, real-time detection of humidity in the OLED packaging technological process is achieved, reference is provided for real-time control of environmental parameters in the packaging technological process, and further influence of the water vapor on the packaging technological process is avoided.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a preparation method thereof.
Background
With the continuous development of display technology, an Organic Light-Emitting Diode (OLED) display panel is presented. The OLED display panel utilizes the self-luminous technology of the OLED and does not need a backlight source. Compared with the traditional liquid crystal display panel, the OLED display panel has the characteristics of low cost, few processes, low-voltage driving and power consumption, wide color gamut, high brightness, high-efficiency light emission, full solid state, flexibility and the like. However, at present, the OLED display panel cannot be widely used, and one important reason is that the lifetime of the OLED device is short, and is usually about 5000 hours. Water vapor and oxygen seriously affect the life span of an organic light emitting layer in an OLED device, and thus, an encapsulation process exists in a fabrication process of an OLED display panel, which aims to prevent water vapor and oxygen from entering the organic light emitting layer.
In the prior art, a common packaging process does not have a real-time humidity detection function, so that the humidity condition in the packaging process cannot be known in real time, and the real-time humidity control in the packaging process cannot be realized.
Disclosure of Invention
The embodiment of the invention aims to provide a display panel and a preparation method thereof so as to realize real-time detection of humidity in the packaging process.
In order to solve the above technical problem, an embodiment of the present invention provides a method for manufacturing a display panel, including:
forming an OLED device on a substrate;
and forming a humidity sensing film capable of changing color according to humidity on one side of the substrate facing the OLED device.
Optionally, a humidity sensing film capable of changing color according to humidity is formed on a side of the substrate facing the OLED device, including:
forming a drying layer on the OLED device;
and forming a humidity sensing film capable of changing color according to humidity on the drying layer.
Optionally, a humidity sensing film capable of changing color according to humidity is formed on a side of the substrate facing the OLED device, including:
and forming a humidity sensing film on the side part of the OLED device on the side of the substrate facing the OLED device, wherein the humidity sensing film can change color according to humidity.
Optionally, forming a humidity sensitive film comprises:
forming a prepolymer film at the position of the humidity sensing film;
treating the pre-polymer film to cause polymerization of the pre-polymer film to form a polymeric film;
and sintering the polymeric film to form a humidity sensing film with a periodic hole structure, wherein the humidity sensing film can change color according to humidity.
Optionally, the treating the pre-polymer film to polymerize the pre-polymer film comprises:
irradiating the prepolymer film with UV light to polymerize the prepolymer film.
Optionally, the sintering temperature is 800-1000 ℃ and the sintering time is 1-2 hours.
Optionally, the material of the prepolymer film comprises polystyrene microspheres, a monofunctional resin monomer, a multifunctional resin monomer, a bifunctional resin monomer and a primary amine group-containing polymerizable monomer.
Optionally, the molar ratio of the monofunctional resin monomer is 10% to 40%, the molar ratio of the bifunctional resin monomer is 20% to 50%, the molar ratio of the polyfunctional resin monomer is 1% to 10%, and the molar ratio of the primary amine group-containing polymerizable monomer is 30% to 50%.
In order to solve the above technical problem, an embodiment of the present invention further provides a display panel, which includes a substrate and an OLED device disposed on the substrate, and the display panel further includes a humidity sensing film disposed on a side of the substrate facing the OLED device, and capable of changing a color according to humidity.
Optionally, the display panel further includes a drying layer disposed on the OLED device, and the humidity sensing film is disposed on the drying layer.
Optionally, the humidity sensing film is disposed at a side of the OLED device.
Optionally, the material of the humidity sensitive membrane comprises primary amine groups.
Optionally, the humidity sensing film has a periodic pore structure.
Optionally, the material of the humidity sensing film further comprises a monofunctional resin monomer, a difunctional resin monomer and a multifunctional resin monomer.
According to the preparation method of the display panel, in the OLED packaging process, the humidity sensing film is formed on one side, facing the OLED device, of the substrate, and the color of the humidity sensing film can be changed according to the humidity. Therefore, in the packaging process, when the color of the humidity sensing film is recognized by naked eyes to change, the fact that water vapor invades in the packaging process can be known, bad products are monitored in real time, meanwhile, qualitative detection of humidity in the OLED packaging technological process is achieved, real-time detection of humidity in the OLED packaging technological process is achieved, reference is provided for real-time control of environmental parameters in the packaging technological process, and further influence of the water vapor on the packaging technological process is avoided.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a schematic view of a method for manufacturing a display panel according to an embodiment of the invention. (ii) a
FIG. 2 is a schematic structural diagram of an OLED device after being formed in the first embodiment of the present invention;
FIG. 3 is a schematic structural view after a drying layer is formed in the first embodiment of the present invention;
FIG. 4a is a schematic view of a first embodiment of the present invention in which a prepolymer solution is sprayed on a dried layer;
FIG. 4b is a schematic view of a first embodiment of the present invention in which a pre-polymer film is irradiated with UV light to form a polymer film;
FIG. 4c is a schematic view illustrating a humidity sensing film formed according to the first embodiment of the present invention;
FIG. 5 is a schematic structural diagram illustrating a barrier layer formed according to the first embodiment of the present invention;
FIG. 6 is a schematic view showing a structural color change of the humidity responsive film;
FIG. 7 is a schematic diagram of water vapor detection by naked eye identification;
FIG. 8 is a schematic humidity response curve of the humidity sensing membrane;
FIG. 9a is a schematic diagram illustrating a pre-polymer film formed in a second embodiment of the present invention;
FIG. 9b is a schematic view illustrating a humidity sensing film formed thereon according to a second embodiment of the present invention;
fig. 10 is a schematic structural diagram of a barrier layer formed in the second embodiment of the present invention.
Description of reference numerals:
10-a substrate; 20-an OLED device; 30-drying the layer;
40-humidity sensing film; 41-holes; 50-barrier layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
Photonic crystals are formed by spatially periodic ordered arrangement of dielectric materials with different dielectric constants (or refractive indices). And filling other materials in the pores of the photonic crystal by taking the photonic crystal as a mold material, and removing the photonic crystal mold material by etching or high-temperature sintering and other methods to finally obtain the inverse opal film with the same periodic structure. The periodic structure of the inverse opal film prevents light of a certain frequency from being allowed to propagate through the periodic structure, the frequency region is called a photonic band gap, and the light which cannot propagate is subjected to coherent diffraction on the surface of the inverse opal film to generate structural color. The inverse opal film prepared by filling the material with special performance in the pores by taking the photonic crystal as a mold material can have special response characteristics.
In order to solve the technical problem that the existing packaging process does not have a humidity real-time detection function, the embodiment of the invention provides a preparation method of a display panel. The preparation method comprises the following steps:
an OLED device is formed on a substrate.
A humidity-sensitive film capable of changing color according to humidity is formed on a side of the substrate facing the OLED device.
According to the preparation method of the display panel, in the OLED packaging process, the humidity sensing film is formed on one side, facing the OLED device, of the substrate, and the color of the humidity sensing film can be changed according to the humidity. Therefore, in the packaging process, when the color of the humidity sensing film is recognized by naked eyes to change, the fact that water vapor invades in the packaging process can be known, bad products are monitored in real time, meanwhile, qualitative detection of humidity in the OLED packaging technological process is achieved, real-time detection of humidity in the OLED packaging technological process is achieved, reference is provided for real-time control of environmental parameters in the packaging technological process, and further influence of the water vapor on the packaging technological process is avoided.
The technical contents of the present invention will be described in detail by specific embodiments. The deposition may be performed by a known process such as sputtering, evaporation, chemical vapor deposition, etc., the coating may be performed by a known coating process, and the etching may be performed by a known method, which is not particularly limited herein.
The first embodiment:
fig. 1 is a schematic view of a method for manufacturing a display panel according to an embodiment of the invention. As shown in fig. 1, the preparation method comprises:
s1: as shown in fig. 2, an OLED device is formed on a substrate, and fig. 2 is a schematic structural diagram of the OLED device formed in the first embodiment of the present invention. The OLED device may be formed on the substrate using methods known in the art.
S2: a humidity-sensitive film capable of changing color according to humidity is formed on a side of the substrate facing the OLED device.
According to the preparation method of the display panel, in the OLED packaging process, the humidity sensing film is formed on one side, facing the OLED device, of the substrate, and the color of the humidity sensing film can be changed according to the humidity. Therefore, in the packaging process, when the color of the humidity sensing film is recognized by naked eyes to change, the fact that water vapor invades in the packaging process can be known, bad products are monitored in real time, meanwhile, qualitative detection of humidity in the OLED packaging technological process is achieved, real-time detection of humidity in the OLED packaging technological process is achieved, reference is provided for real-time control of environmental parameters in the packaging technological process, and further influence of the water vapor on the packaging technological process is avoided.
In this embodiment, forming a humidity sensing film capable of changing color according to humidity on a side of a substrate facing an OLED device may include:
s11: a desiccation layer 30 is formed over OLED device 20. The method specifically comprises the following steps: a drying layer 30 is formed on the OLED device 20 by a deposition process, the drying layer 30 covers the outer surface of the OLED device 20, that is, the orthographic projection of the drying layer 30 on the substrate 10 includes the orthographic projection of the OLED device 20 on the substrate 10, as shown in fig. 3, and fig. 3 is a schematic structural view after the drying layer is formed in the first embodiment of the present invention. The material of the drying layer 30 may include at least one of calcium oxide, barium oxide, chloride drying agent (such as zinc chloride, calcium chloride, tin chloride or antimony chloride), zinc-containing metal organic framework compound, and the like.
S12: a humidity-sensitive film 40 is formed on the drying layer 30, and the humidity-sensitive film 40 can change color according to humidity.
In one embodiment, forming the humidity sensing film may include:
s121: a prepolymer film is formed at the location of the humidity sensitive film. Specifically, a prepolymer solution is formed, and the prepolymer solution is sprayed on the drying layer 30 by an inkjet printing method to form a prepolymer film, wherein the prepolymer film covers the outer surface of the drying layer 30, that is, the orthographic projection of the drying layer 30 on the substrate 10 is within the orthographic projection range of the prepolymer film on the substrate 10, as shown in fig. 4a, and fig. 4a is a schematic diagram of spraying the prepolymer solution on the drying layer in the first embodiment of the present invention. The prepolymer comprises polystyrene microspheres, a monofunctional group resin monomer, a polyfunctional group resin monomer, a bifunctional group resin monomer, a primary amine group-containing polymerizable monomer and a photoinitiator.
The particle size of the polystyrene microsphere is 230 nm-250 nm.
The monofunctional resin monomer includes one or more of the following monomers: methyl methacrylate, ethyl methacrylate, n-butyl methacrylate, isobutyl methacrylate, tert-butyl methacrylate, hexyl methacrylate, isooctyl methacrylate, isodecyl methacrylate, lauryl methacrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate, glycidyl methacrylate, methyl acrylate, ethyl acrylate, hexyl acrylate, isooctyl acrylate, isodecyl acrylate, lauryl acrylate.
The difunctional resin monomer includes one or more of the following monomers: diethylene glycol diacrylate, triethylene glycol diacrylate, polyethylene glycol (200) diacrylate, dipropylene glycol diacrylate, tripropylene glycol diacrylate, 1, 4-butanediol diacrylate, 1, 6-hexanediol diacrylate, neopentyl glycol diacrylate, ethoxy neopentyl glycol diacrylate, propoxy neopentyl glycol diacrylate.
The multifunctional resin monomer includes one or more of the following monomers: trimethylolpropane triacrylate, pentaerythritol triacrylate, ethoxytrimethylolpropane triacrylate.
The molecular structure of the polymerizable monomer containing the primary amine group is shown as the following formula (1):
CH2CHRNH2of the formula (I)
Wherein R may be formula (2), as follows:
wherein, the substituents R1, R2, R3 and R4 in the formula (2) can be the same or different, and the substituents R1, R2, R3 and R4 are respectively independent and are selected from hydrogen atoms and C41～C6Alkyl or C1～C5N is an integer of 1 to 10.
In the prepolymer, the molar ratio of the monofunctional resin monomer, the difunctional resin monomer, the polyfunctional resin monomer and the primary amine group-containing polymerizable monomer is shown in table 1.
TABLE 1 molar ratios of the substances in the prepolymers
Photoinitiators can include photoinitiator-651 (Irgacure-651) and photoinitiator 2959 (Darocur)
The molecular formula of Darocur 2959 is:
the photoinitiator accounts for 1 to 5 percent of the mass of the prepolymer.
S122: the pre-polymer film is treated to cause polymerization of the pre-polymer film to form a polymerized film 40'. The method specifically comprises the following steps: the prepolymer film is irradiated with light to cause polymerization of the prepolymer film, thereby forming a polymerized film 40'. In one embodiment, the prepolymer film is irradiated with UV light to effect polymerization, as shown in fig. 4b, and fig. 4b is a schematic diagram of the prepolymer film irradiated with UV light to form a polymer film according to the first embodiment of the present invention. The intensity and the irradiation time of the UV light may be determined according to actual needs, and are not limited herein.
S123: the polymer film is sintered to form a humidity sensing film 40 having a periodic pore structure, and the humidity sensing film 40 can change color according to humidity, as shown in fig. 4c, where fig. 4c is a schematic diagram of the humidity sensing film formed in the first embodiment of the present invention. As can be seen from fig. 4c, the humidity-sensitive film has a periodic pore structure. Wherein the sintering temperature is 800-1000 ℃ and the sintering time is 1-2 hours. The polystyrene microspheres in the polymeric film can be removed by sintering the polymeric film, so that the humidity sensing film 40 with periodic holes 41 is formed, the size of the holes 41 is 230 nm-250 nm, and the formed humidity sensing film has an inverse opal structure.
In one embodiment, the method for manufacturing a display panel may further include S13: as shown in fig. 5, a barrier layer 50 is formed on the humidity sensing film, and fig. 5 is a schematic structural diagram after the barrier layer is formed in the first embodiment of the present invention. A deposition process may be used to form barrier layer 50 on OLED device 20 and humidity sensitive film 40, with barrier layer 50 covering the outer surfaces of OLED device 20 and humidity sensitive film 40. The material of the barrier layer can be polyethylene terephthalate doped with polyaniline.
The principle of the humidity sensitive film 40 generating color change according to humidity is: the humidity sensing film 40 is an inverse opal structure layer having a periodic pore structure, and may show a structural color visible to the naked eye. The humidity sensing film 40 includes a primary amine group, and thus, when the humidity sensing film 40 is acted by water vapor, the lattice spacing and the refractive index of the pores in the humidity sensing film 40 are changed (both the lattice spacing and the refractive index of the pores are increased), which results in a red shift and a change in the structural color.
Based on the characteristic of the humidity sensing film 40, the humidity during the OLED packaging process can be qualitatively detected by means of naked eye identification. Fig. 6 is a schematic diagram of structural color change of the humidity sensing film, and fig. 7 is a schematic diagram of water vapor detection by naked eye recognition. As shown in fig. 7, the initial structural color of the humidity sensing film is blue, and the structural color of the humidity sensing film changes from blue to green after the humidity sensing film is exposed to water vapor. As shown in fig. 7, when the naked eye recognizes that the humidity sensing film 40 changes from blue to green, it indicates that moisture enters the packaging process, and an operator can perform corresponding processing according to the change of the color of the humidity sensing film.
FIG. 8 is a humidity response curve of the humidity sensing membrane. The humidity sensing film is tested before and after the intrusion of the moisture by using a reflection spectrometer, so as to obtain a first humidity response curve 61 and a second humidity response curve 62, as shown in fig. 8, the first humidity response curve 61 is a reflection peak curve obtained by testing the initial humidity sensing film (without the moisture) by using the reflection spectrometer, the second humidity response curve 62 is a reflection peak curve obtained by testing the humidity sensing film containing the moisture by using the reflection spectrometer, and the second humidity response curve 62 is red-shifted with respect to the first humidity response curve 61. According to the reflection peak curve of the humidity sensing film, the humidity in the packaging process can be quantitatively detected, so that an operator can correspondingly control the environmental parameters of the packaging process according to the obtained specific humidity value, and the environmental parameters of the packaging process can better meet the requirements of the packaging process.
As shown in fig. 5, the display panel manufactured by the method according to the embodiment of the present invention includes a substrate 10, an OLED device 20 disposed on the substrate 10, and a humidity sensing film 40 disposed on a side of the substrate 10 facing the OLED device 20 and capable of changing color according to humidity.
The display panel further includes a drying layer 30 disposed on the OLED device, and a humidity sensing film 40 is disposed on the drying layer 30.
The material of the humidity sensitive film 40 includes a primary amine group. The humidity sensing film has a periodic pore structure. The size of the holes is 230 nm-250 nm.
In one embodiment, the material of the humidity sensitive film includes a monofunctional resin monomer, a difunctional resin monomer, a multifunctional resin monomer, and a primary amine group-containing polymerizable monomer.
In one embodiment, the display panel further includes a barrier layer 50 disposed on the humidity sensitive film 40.
According to the display panel prepared by the embodiment of the invention, the humidity sensing film is arranged on the drying layer, and the color of the humidity sensing film can be changed according to the humidity. Therefore, in the packaging process, when the color of the humidity sensing film is recognized by naked eyes to change, the fact that water vapor invades in the packaging process can be known, bad products are monitored in real time, meanwhile, qualitative detection of humidity in the OLED packaging technological process is achieved, real-time detection of humidity in the OLED packaging technological process is achieved, reference is provided for real-time control of environmental parameters in the packaging technological process, and further influence of the water vapor on the packaging technological process is avoided.
In addition, the display panel prepared by the embodiment of the invention adopts common organic materials as the materials of the humidity sensing film, has low cost, is harmless to human bodies and is beneficial to environmental protection. Moreover, the humidity sensing film contains primary amine groups, and after trace water vapor is combined with the amine groups, the moisture sensing film can be directly absorbed by the inverse opal film and locked between polymer chains, so that the water vapor is prevented from further invading and damaging the OLED light-emitting layer, and the light-emitting layer of the OLED device is further protected.
The display panel prepared in the embodiment of the present invention is a bottom emission display panel, that is, the light emitting side of the display panel is the side of the substrate 10 away from the OLED device.
The display panel may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
Second embodiment:
the second embodiment of the present invention provides another method for manufacturing a display panel. Unlike the first embodiment, in the present embodiment, a humidity sensing film capable of changing color according to humidity is formed on a side of a substrate facing the OLED device, including:
and forming a humidity sensing film on the side part of the OLED device on the side of the substrate facing the OLED device, wherein the humidity sensing film can change color according to humidity.
In one embodiment, forming the humidity sensing film may include:
s221: a prepolymer film is formed at the location of the humidity sensitive film. Specifically, a prepolymer solution is formed, and the prepolymer solution is sprayed on the side position of the OLED device 20 by using an inkjet printing method to form a prepolymer film, wherein the prepolymer film is arranged around the OLED device 20 and is in contact with the side surface of the OLED device 20. The materials of the prepolymer are the same as those of the first example and will not be described in detail.
S222: the prepolymer film is processed to polymerize the prepolymer film to form a polymerized film 40', as shown in fig. 9a, and fig. 9a is a schematic structural diagram of the prepolymer film formed in the second embodiment of the present invention. The method specifically comprises the following steps: the prepolymer film is irradiated with light to cause polymerization of the prepolymer film, thereby forming a polymerized film 40'. In one embodiment, the prepolymer film is irradiated with UV light to effect polymerization, forming a polymeric film. The intensity and irradiation time of the UV light may be determined according to actual needs, and are not limited herein. It is to be understood that the thickness of the polymeric film 40 'is not limited to a specific value, and the thickness of the polymeric film 40' may be determined according to actual needs.
S223: the polymer film is sintered to form a humidity sensing film 40 having a periodic pore structure, the humidity sensing film 40 can change color according to humidity, as shown in fig. 9b, and fig. 9b is a schematic diagram of the humidity sensing film formed in the second embodiment of the present invention. As can be seen from fig. 9b, the humidity sensing film has a periodic hole structure, and the humidity sensing film is disposed around the OLED device 20 and contacts the side surface of the OLED device 20. Wherein the sintering temperature is 800-1000 ℃ and the sintering time is 1-2 hours. The polystyrene microspheres in the polymeric film can be removed by sintering the polymeric film, so that the humidity sensing film 40 with periodic holes 41 is formed, the size of the holes 41 is 230 nm-250 nm, and the formed humidity sensing film has an inverse opal structure.
In one embodiment, the method for manufacturing a display panel may further include S23: as shown in fig. 10, a barrier layer 50 is formed on the humidity sensing film, and fig. 10 is a schematic structural diagram after the barrier layer is formed in the second embodiment of the present invention. A deposition process may be used to form barrier layer 50 on OLED device 20 and humidity sensitive film 40, with barrier layer 50 covering the outer surfaces of OLED device 20 and humidity sensitive film 40.
In the embodiment of the present invention, the principle of the humidity sensing film 40 generating color change according to humidity is the same as that of the first embodiment, and is not described herein again.
As shown in fig. 10, the display panel manufactured by the method according to the embodiment of the present invention includes a substrate 10, an OLED device 20 disposed on the substrate 10, and a humidity sensing film 40 disposed on a side of the substrate 10 facing the OLED device 20 and capable of changing color according to humidity.
Wherein, the humidity sensing film 40 is disposed at a side portion of the OLED device 20, and the humidity sensing film 40 is disposed around the OLED device 20 and in contact with a side surface of the OLED device 20.
The material of the humidity sensitive film 40 includes a primary amine group. The humidity sensing film has a periodic pore structure. The size of the holes is 230 nm-250 nm.
In one embodiment, the material of the humidity sensitive film includes a monofunctional resin monomer, a difunctional resin monomer, a multifunctional resin monomer, and a primary amine group-containing polymerizable monomer.
In one embodiment, the display panel further includes a barrier layer 50 disposed on the OLED device 20 and the humidity sensing film 40.
In one embodiment, the display panel prepared by the embodiment of the present invention is a top-emission display panel, that is, the light emitting side of the display panel is the side of the OLED device facing away from the substrate 10.
In one embodiment, the display panel prepared in the embodiment of the present invention is a transmissive display panel, that is, both the upper and lower sides of the display panel are light emitting sides.
The display panel may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
In the description of the embodiments of the present invention, it should be understood that the terms "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A method for manufacturing a display panel, comprising:
forming an OLED device on a substrate;
forming a humidity-sensitive film capable of changing color according to humidity on a side of the substrate facing the OLED device, including:
forming a drying layer on the OLED device; forming a humidity sensing film capable of changing color according to humidity on the drying layer;
or, a humidity sensing film is formed on a side of the substrate facing the OLED device, the humidity sensing film being capable of changing color according to humidity, the side being located at a side portion of the OLED device.
2. The method of claim 1, wherein forming the humidity sensitive film comprises:
forming a prepolymer film at the position of the humidity sensing film;
treating the pre-polymer film to cause polymerization of the pre-polymer film to form a polymeric film;
and sintering the polymeric film to form a humidity sensing film with a periodic hole structure, wherein the humidity sensing film can change color according to humidity.
3. The method of claim 2, wherein the treating the pre-polymer film to polymerize the pre-polymer film comprises:
irradiating the prepolymer film with UV light to polymerize the prepolymer film.
4. The method according to claim 2, wherein the material of the pre-polymer film comprises polystyrene microspheres, a monofunctional resin monomer, a multifunctional resin monomer, a difunctional resin monomer and a polymerizable monomer containing a primary amine group.
5. The method according to claim 4, wherein the molar ratio of the monofunctional resin monomer is 10% to 40%, the molar ratio of the difunctional resin monomer is 20% to 50%, the molar ratio of the multifunctional resin monomer is 1% to 10%, and the molar ratio of the primary amine group-containing polymerizable monomer is 30% to 50%.
6. The display panel is characterized by comprising a substrate and an OLED device arranged on the substrate, and further comprising a humidity sensing film which is arranged on one side of the substrate, facing the OLED device, and can change color according to humidity;
the display panel further comprises a drying layer arranged on the OLED device, and the humidity sensing film is arranged on the drying layer; alternatively, the humidity sensing film is disposed at a side portion of the OLED device.
7. The display panel according to claim 6, wherein the material of the humidity sensitive film comprises a primary amine group.
8. The display panel according to claim 6, wherein the humidity sensitive film has a periodic hole structure.
9. The display panel of claim 7, wherein the material of the humidity sensitive film further comprises a monofunctional resin monomer, a difunctional resin monomer, and a multifunctional resin monomer.
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| CN201910460384.8A CN110137376B (en) | 2019-05-30 | 2019-05-30 | Display panel and preparation method thereof |
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| CN201910460384.8A CN110137376B (en) | 2019-05-30 | 2019-05-30 | Display panel and preparation method thereof |
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| CN110137376A CN110137376A (en) | 2019-08-16 |
| CN110137376B true CN110137376B (en) | 2021-09-14 |
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| CN103048269A (en) * | 2012-12-19 | 2013-04-17 | 南京师范大学 | Relative humidity sensor of optical fiber bundle modified by inverse opal film and preparation method thereof |
| CN104672733A (en) * | 2013-12-02 | 2015-06-03 | 中国人民银行印制科学技术研究所 | Humidity-sensitive allochroic anti-counterfeiting functional material, and preparation method and application thereof |
| CN108305954A (en) * | 2018-01-24 | 2018-07-20 | 武汉华星光电半导体显示技术有限公司 | The film encapsulation method and OLED device of OLED device |
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| CN103048269A (en) * | 2012-12-19 | 2013-04-17 | 南京师范大学 | Relative humidity sensor of optical fiber bundle modified by inverse opal film and preparation method thereof |
| CN104672733A (en) * | 2013-12-02 | 2015-06-03 | 中国人民银行印制科学技术研究所 | Humidity-sensitive allochroic anti-counterfeiting functional material, and preparation method and application thereof |
| CN108305954A (en) * | 2018-01-24 | 2018-07-20 | 武汉华星光电半导体显示技术有限公司 | The film encapsulation method and OLED device of OLED device |
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