WO2020244264A1 - Display panel and preparation method therefor, and display device - Google Patents

Abstract

A display panel (10) and preparation method therefor, and a display device, relating to the technical field of display. The display panel (10) comprises: a display panel body having a display region and a non-display region; a sealant (14) located in the non-display region; and a hydrophobic fluorocarbon film layer (151) located on the surface of the sealant (14) away from the display region. By providing the hydrophobic fluorocarbon film layer (151) on the surface of the sealant (14) away from the display region, the display panel is imparted with hydrophobicity to effectively block the entry of moisture, such that the display panel can still keep normal display in a high-temperature high-humidity environment. The chemical structure of the sealant (14) is not changed, and the basic performance thereof is not affected. The hydrophobic fluorocarbon film layer (151) can be formed during the preparation process of the display panel (10), thereby avoiding complications of the preparation technology of the display panel (10) while improving the hydrophobicity of the display panel (10).

Description

Display panel and preparation method thereof, and display device

This application claims the priority of the Chinese patent application filed on June 5, 2019 with the application number 201910485388.1, the invention title is "liquid crystal display panel, its preparation method and display device", the entire content of which is incorporated into this application by reference .

Technical field

This application relates to the field of display technology, in particular to a display panel, a manufacturing method thereof, and a display device.

Background technique

Liquid crystal display devices and organic light-emitting display devices are widely used as common display devices, and both are packaged and sealed with a frame sealant to isolate their interior from the external environment to achieve the purpose of blocking water vapor. However, when used in a relatively closed environment, such as an in-vehicle system, the impact of high temperature and high humidity easily reduces the life of the display device. Therefore, it is necessary to improve their ability to block water vapor.

Summary of the invention

The embodiments of the present application provide a display panel, a manufacturing method thereof, and a display device, which can be used to solve the problem of poor water vapor barrier capability. The technical solution is as follows:

In one aspect, an embodiment of the present application provides a display panel, including: a display panel body having a display area and a non-display area;

Frame sealing glue, located in the non-display area;

The first hydrophobic fluorocarbon film layer is located on the surface of the frame sealant away from the display area.

Optionally, the display panel is a liquid crystal display panel.

Optionally, the display panel body includes: a first substrate;

A second substrate opposite to the first substrate, and the display area and the non-display area are formed between the first substrate;

The liquid crystal is located in the display area.

Optionally, the first substrate includes a first alignment film, and the second substrate includes a second alignment film;

The display panel further includes: a second hydrophobic fluorocarbon film layer on the exposed surfaces of the first alignment film and the second alignment film corresponding to the non-display area.

Optionally, one of the first substrate and the second substrate is a color filter substrate, and the other is an array substrate.

Optionally, the display panel is an organic light emitting display panel.

Optionally, the display panel body includes: a base substrate;

A cover plate opposite to the base substrate, and the display area and the non-display area are formed between the base substrate;

The organic light emitting display layer is located in the display area.

Optionally, the water contact angle of the first hydrophobic fluorocarbon film layer is greater than 150°.

In another aspect, a method for manufacturing a display panel is provided, including: forming a display panel body;

Forming the frame sealant and the first hydrophobic fluorocarbon film layer in the non-display area of the display panel body includes: pre-curing the frame sealant in the non-display area under the action of ultraviolet light, and making the fluorine-containing plasma React with the active groups on the surface of the frame sealant away from the display area to form a first hydrophobic fluorocarbon film layer;

The active group is generated by excitation of the ultraviolet light.

Optionally, the display panel is a liquid crystal display panel, and the display panel body includes: a first substrate and a second substrate for forming the display area and the non-display area;

The forming the frame sealant and the first hydrophobic fluorocarbon film layer in the non-display area of the display panel body includes:

Coating frame sealant on the non-display area;

Aligning the first substrate and the second substrate in a vacuum environment;

Provide fluorine-containing plasma;

The frame sealant is pre-cured by ultraviolet light, and the fluorine-containing plasma reacts with the active groups on the surface of the frame sealant away from the display area to form a hydrophobic fluorocarbon film layer.

Optionally, the first substrate includes a first alignment film, and the second substrate includes a second alignment film;

The fluorine-containing plasma also reacts with active groups of the first alignment film and the second alignment film corresponding to the exposed surfaces of the non-display area to form a first hydrophobic fluorocarbon film layer.

Optionally, the display panel is an organic light emitting display panel, and the display panel body includes: a base substrate and a cover plate for forming the display area and the non-display area;

The forming the frame sealant and the first hydrophobic fluorocarbon film layer in the non-display area of the display panel body includes:

Coating frame sealant on the non-display area;

Aligning the base substrate and the cover plate in a vacuum environment;

Provide fluorine-containing plasma;

The frame sealant is pre-cured by ultraviolet light, and the fluorine-containing plasma reacts with the active groups on the surface of the frame sealant away from the display area to form a hydrophobic fluorocarbon film layer.

Optionally, the preparation method further includes: thermally curing the pre-cured frame sealant after forming the hydrophobic fluorocarbon film layer.

Optionally, the wavelength of the ultraviolet light is 190nm-280nm.

Optionally, the wavelength of the ultraviolet light is 254 nm.

Optionally, the fluorine-containing plasma includes at least one of CF ₄ plasma, CHF ₃ plasma, C ₂ HF ₅ plasma, and C ₄ F ₈ plasma.

Optionally, the active group is selected from at least one of a terminal amino group, a terminal carboxyl group, a terminal hydroxyl group, a terminal carbonyl group, and a terminal sulfhydryl group.

In another aspect, an embodiment of the present application provides a display device, wherein the display device includes any of the above-mentioned display panels.

Optionally, the display device is electronic paper, a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, or a navigator.

Optionally, the display device is vehicle-mounted.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained from these drawings without creative work.

FIG. 1 is a schematic cross-sectional view of a liquid crystal display panel provided by an exemplary embodiment of the present application during the manufacturing process;

FIG. 2 is a schematic diagram of the distribution of fluorine-containing plasma after the vacuum of the box is broken according to an exemplary embodiment of the present application;

FIG. 3-1 is a schematic diagram of the formation principle of a hydrophobic fluorocarbon film layer on an alignment film provided by an exemplary embodiment of the present application;

3-2 is a schematic diagram of the formation principle of the hydrophobic fluorocarbon film layer on the frame sealant provided by an exemplary embodiment of the present application;

4 is a schematic diagram of the distribution of hydrophobic fluorocarbon film layers formed in a liquid crystal display panel provided by an exemplary embodiment of the present application;

FIG. 5 is a schematic cross-sectional view of an organic light emitting display panel provided by an exemplary embodiment of the present application.

The reference signs are as follows:

1-mother board, 10-liquid crystal display panel,

11-color film substrate, 111-first base substrate, 112-color resist structure layer, 113-first alignment film,

12-LCD,

13-array substrate, 131-second base substrate, 132-array structure layer, 133-second alignment film,

14-frame sealing compound, 151-first hydrophobic fluorocarbon film layer, 152-second hydrophobic fluorocarbon film layer,

20-mask, 30-ultraviolet light, 40-fluorine-containing plasma,

50-organic light-emitting display panel, 501-base substrate, 502-cover plate, 503-organic light-emitting display layer.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the accompanying drawings.

It should be noted that the terms "上" and "下" involved in this application are only relative concepts or refer to the normal use state of the product, and should not be considered restrictive. The terms "first", "second" and similar words do not denote any order, quantity or importance, but are merely used to distinguish different components.

At present, display panels are becoming lighter and thinner, which generally requires the use of hydrofluoric acid soaking and thinning. This process usually causes the sealant to crack or even break, resulting in liquid leakage. Therefore, it is very important to improve the sealing performance of the frame sealant to improve the water vapor barrier. In the prior art, methods for improving the water vapor barrier of display devices are usually: improving the chemical structure of the frame sealant, increasing the proportion of water-blocking groups, and thereby increasing its barrier properties. However, this often affects other properties of the frame sealant itself, and even causes a sharp drop, affecting the normal use of the display device.

In one aspect, an embodiment of the present application provides a display panel, including: a display panel body having a display area and a non-display area; a frame sealant located in the non-display area; a first hydrophobic fluorocarbon film layer located away from the frame sealant On the surface of the display area.

In the embodiment of the present application, a first hydrophobic fluorocarbon film layer is provided on the surface of the frame sealant away from the display area to give it hydrophobicity, which effectively blocks the entry of water vapor, so that it can maintain normal display in a high temperature and high humidity environment. This method does not change the chemical structure of the frame sealant and does not affect its basic performance. The first hydrophobic fluorocarbon film layer can be prepared by using fluorine-containing plasma to react with active groups excited on the surface of the frame sealant due to UV light pre-curing. Since the ultraviolet light pre-curing of the frame sealant is one of the manufacturing steps of the display panel, the first hydrophobic fluorocarbon film layer can be formed during the manufacturing process of the display panel, which can improve the hydrophobicity of the display panel while avoiding its The preparation process is complicated.

In the embodiments of the present application, the surface of the frame sealant away from the display area refers to the surface of the frame sealant exposed to the external environment.

The display panels involved in the embodiments of the present application include, but are not limited to: liquid crystal display panels and organic light emitting display panels. The two types of display panels are described below:

As an example, the display panel provided by the embodiment of the present application is a liquid crystal display panel.

As shown in FIG. 1, the display panel body of the liquid crystal display panel includes: a first substrate (for example, a color filter substrate 11); a second substrate (for example, the array substrate 13) opposite to the first substrate, and the first substrate and the second substrate The above-mentioned display area and non-display area, and the liquid crystal 12 located in the display area are formed between the two substrates.

It can be understood that the frame sealant 14 is provided in the non-display area, and the surface of the frame sealant 14 away from the display area has the first hydrophobic fluorocarbon film layer 151.

It can be understood that the frame sealant seals the liquid crystal in the display area formed between the first substrate and the second substrate. Among them, since the surface of the frame sealant away from the display area has the first hydrophobic fluorocarbon film layer, the display panel has hydrophobic characteristics, and can even achieve super-hydrophobic characteristics, effectively preventing water vapor from entering, and maintaining normal display in a high temperature and high humidity environment. The non-display area where the sealant is located can also be understood as an encapsulation area, which can be set around the display area.

As shown in FIG. 1, one of the first substrate and the second substrate may be a color filter substrate 11, and the other may be an array substrate 13. For example, the first substrate is a color filter substrate 11, and accordingly, the second substrate is an array Substrate 13; or, the first substrate is an array substrate 13, and correspondingly, the second substrate is a color filter substrate 11.

Optionally, as shown in FIG. 1 and FIG. 4, the first substrate, for example, the color filter substrate 11 includes a first alignment film 113, and the second substrate, for example, the array substrate 13 includes a second alignment film 133. The display panel provided by the embodiment of the present application further includes: a second hydrophobic fluorocarbon film layer 152 located on the exposed surfaces of the first alignment film 113 and the second alignment film 133 corresponding to the non-display area.

By disposing the hydrophobic fluorocarbon film layer on the first alignment film and the second alignment film, the water vapor barrier capability of the display panel can be further improved.

Based on the materials of the first alignment film and the second alignment film, the second hydrophobic fluorocarbon film layer can be prepared by reacting fluorine-containing plasma with active groups excited on the surface of the alignment film due to ultraviolet light precuring. Since the UV light pre-curing of the frame sealant is one of the preparation steps of the display panel, during the preparation process of the display panel, the first hydrophobic fluorocarbon film layer and the second hydrophobic fluorocarbon film layer and the second layer can be formed on the exposed surfaces of the frame sealant and the alignment film at the same time. The hydrophobic fluorocarbon film layer improves the hydrophobicity of the display panel while avoiding the complexity of the preparation process.

Wherein, the exposed surfaces of the first alignment film and the second alignment film corresponding to the non-display area can also be understood as the exposed surfaces located outside the display area, including: (1) the first alignment film and the second alignment film Cross section, the “cross section” refers to a plane perpendicular to the plane where the largest surface of the alignment film is located. (2) The parts of the surface of the first alignment film and the second alignment film that are in direct contact with the sealant outside the display area.

When the first alignment film and the second alignment film are respectively disposed on the first substrate and the second substrate, that is, the first alignment film and the second alignment film directly contact the liquid crystal, and the first alignment film and the second alignment film are packaged. The parts corresponding to the display area are respectively in direct contact with the sealant. At this time, the surface of the first alignment film and the second alignment film directly in contact with the sealant outside the display area has a hydrophobic fluorocarbon film layer.

For example, the hydrophobic fluorocarbon film layer can be formed by the following method: after the first substrate and the second substrate of the liquid crystal display panel are aligned in a vacuum environment, fluorine-containing plasma is passed through. The introduced fluorine-containing plasma is adsorbed on the surface of the liquid crystal display panel that is not sealed, such as the surface of the sealant away from the display area, that is, the exposed surface of the alignment film outside the display area. Afterwards, ultraviolet light is used to pre-curing the sealant and form a hydrophobic fluorocarbon film. In this process, the frame sealant is pre-cured by ultraviolet light, and at the same time, the frame sealant and the alignment film are excited by the ultraviolet light to generate active groups, such as terminal hydroxyl groups, terminal carboxyl groups, terminal amino groups, or terminal carbonyl groups, and terminal sulfhydryl groups. The above active groups and the fluorine-containing plasma adsorbed on the surface can undergo a bonding reaction to form a first hydrophobic fluorocarbon film layer and a second hydrophobic fluorocarbon film layer.

As another example, the display panel provided by the embodiment of the present application is an organic light emitting display panel.

As shown in FIG. 5, the display panel body of the organic light emitting display panel 50 includes: a base substrate 501; a cover plate 502, opposite to the base substrate 501, and a display area and a non-display area are formed between the base substrate 501 Area; organic light emitting display layer 503, located in the display area.

It can be understood that the organic light emitting display panel 50 further includes: the frame sealant 14 located in the non-display area; and the first hydrophobic fluorocarbon film layer 151 is located on the surface of the frame sealant 14 away from the display area.

It can be understood that the frame sealant 14 seals the organic light emitting display layer 503 between the base substrate 501 and the cover plate 502 to form a display area. Among them, since the surface of the frame sealant 14 away from the display area has the first hydrophobic fluorocarbon film layer 151, the organic display panel has hydrophobic characteristics, and can even achieve super-hydrophobic characteristics, effectively preventing the entry of water vapor, and it is still in a high temperature and high humidity environment. Maintain normal display.

The water contact angle of the hydrophobic fluorocarbon film layer involved in the embodiments of the present application is greater than 90°. Furthermore, the water contact angle can be greater than 150° to achieve super-hydrophobic performance and further improve water vapor barrier performance. The thickness of the hydrophobic fluorocarbon film layer can be 5nm-100nm, for example, it can be 10nm, 20nm, 30nm, 40nm, 50nm, 60nm, 70nm, 80nm, 90nm and so on.

For example, in an example, a liquid crystal display panel is provided, the surface of the frame sealant away from the display area has a first hydrophobic fluorocarbon film layer, and the first alignment film and the second alignment film are located in the display area. There is a second hydrophobic fluorocarbon film on the exposed surface. After testing, the water contact angle of the first hydrophobic fluorocarbon film and the second hydrophobic fluorocarbon film are both greater than 150°, achieving super-hydrophobic characteristics and effectively preventing water vapor After testing, after the liquid crystal display panel is kept in an environment of 90% relative humidity and 30°C for 240 hours, the water contact angle of the hydrophobic fluorocarbon film layer on the liquid crystal display panel does not decrease, showing a stable super Hydrophobicity enables the liquid crystal display panel to maintain a stable and normal display in a high temperature and high humidity environment.

In another aspect, an embodiment of the present application provides a method for manufacturing a display panel, including: forming a display panel body.

The frame sealant and the first hydrophobic fluorocarbon film layer are formed in the non-display area of the display panel body, which includes: pre-curing the frame sealant in the non-display area under the action of ultraviolet light, and causes the fluorine-containing plasma to seal the frame The active groups on the surface of the glue away from the display area react to form a first hydrophobic fluorocarbon film layer.

Among them, the active group is generated by excitation by ultraviolet light.

In the preparation method of the display panel provided by the embodiment of the present application, during the preparation process of the display panel, the fluorine-containing plasma is reacted with the active groups on the surface of the frame sealant away from the display area by the step of pre-curing the frame sealant with ultraviolet light. A first hydrophobic fluorocarbon film layer is formed. Since the ultraviolet light can excite the frame sealant away from the surface of the display area to generate active groups, thereby forming the hydrophobic fluorocarbon film layer, not only the hydrophobic fluorocarbon film layer can be formed, but also the manufacturing method of the display panel is not complicated.

The fluorine-containing plasma can be provided before the UV light pre-curing the frame sealant. The preparation methods of the two types of display panels are described below:

As an example, the display panel is a liquid crystal display panel, and the liquid crystal display panel includes a first substrate and a second substrate for forming a display area and a non-display area.

Wherein, forming a sealant and a first hydrophobic fluorocarbon film layer in the non-display area of the display panel body includes:

Apply sealant on the non-display area of the LCD panel.

The first substrate and the second substrate of the liquid crystal display panel are aligned in a vacuum environment.

Provide fluorine-containing plasma.

The frame sealant is pre-cured by ultraviolet light, and the fluorine-containing plasma reacts with the active groups on the surface of the frame sealant away from the display area to form a hydrophobic fluorocarbon film layer.

Among them, the fluorine-containing plasma can be provided by passing into a vacuum environment to break the vacuum after the first substrate and the second substrate are placed in the vacuum environment (the prior art will break the vacuum by introducing nitrogen) . It can be seen that the fluorine-containing plasma can not only be used to form a hydrophobic fluorocarbon film, but also can be used to break the vacuum environment when the box is aligned, simplify the preparation process, and has high advantages.

Further, the first substrate includes a first alignment film, and the second substrate includes a second alignment film;

The fluorine-containing plasma also reacts with the active groups on the exposed surfaces of the first alignment film and the second alignment film outside the display area to form a second hydrophobic fluorocarbon film layer, which further improves the sealing effect of the display panel.

The specific forming process of the liquid crystal display panel is explained in detail below with reference to FIGS. 1-4. The following embodiments take the first substrate as a color filter substrate and the second substrate as an array substrate as examples to explain the inventive concept of the present application, but are not intended to limit the present application.

As shown in FIG. 1, the liquid crystal display panel 10 includes: a color filter substrate 11 and an array substrate 13 arranged oppositely. The liquid crystal 12 is filled between the color filter substrate 11 and the array substrate 13, and the frame sealant 14 seals the liquid crystal 12 on the color filter. The display area between the substrate 11 and the array substrate 13.

The color filter substrate 11 includes: a first base substrate 111, a color resist structure layer 112, and a first alignment film 113 stacked in sequence.

The first base substrate 111 may be glass or a polymer film such as PET or PI. The color resist structure layer 112 is generally formed by coating and exposure methods, including red, blue, and green color resists, and a black matrix for isolating the color resists, a resin layer with a thick support box, and smoothing of the color resists and supporting column differences The flat layer. The first alignment film 113 can be formed by a method of transfer, injection, and baking, and the material can be polyimide.

The array substrate 13 includes: a second base substrate 131, an array structure layer 132, and a second alignment film 133 stacked in sequence.

The array structure layer 132, namely the array substrate, is used for driving the liquid crystal 12. The second alignment film 133 may be formed by a method of transfer, injection, and baking, and the material may be polyimide.

The liquid crystal 12 can form a liquid crystal layer by a one drop fill method. The frame sealant 14 is used to seal the liquid crystal 12 in the display area. The sealant 14 is generally formed on the color filter substrate 11 or the array substrate 13 after coating and injection. Correspondingly, the liquid crystal 12 can be formed on another substrate, that is, the frame sealant 14 is formed on the color filter substrate 11, and the liquid crystal 12 is formed on the array substrate 13 accordingly; on the contrary, the frame sealant 14 is formed on the array substrate 13. The liquid crystal 12 is formed on the color filter substrate 11.

After that, the color filter substrate 11 and the array substrate 13 are aligned in a vacuum environment. Specifically, the color filter substrate 11 and the array substrate 13 can be separately sent into the vacuum box-setting equipment by a robot. The array substrate 13 can be placed above.

After that, the vacuum boxing equipment is started to evacuate. When the pressure reaches the vacuum level, the array substrate 13 and the color filter substrate 11 move toward each other and contact the boxing under the operation of the suction device inside the equipment. After this process, the frame sealant 14 separates the display areas of the display panels 10 on the same motherboard 1 one by one (as shown in FIG. 2).

Subsequently, a fluorine-containing plasma 40 is passed into the device. Fluorine-containing plasma 40, for example, be _{CF4, CHF 3, C 2 HF} 5, C 4 F 8 gas such as physical or chemical prepared by plasma obtained by the method.

For example, CF ₄ can form a variety of fluorine-containing ionic structures through plasmaization, such as -CF ₃ ·, -CF ₂ ·, -CF·, -F·, as shown in Figure 2 The distribution diagram of the fluorine plasma 40 shows that at this time, since the inside of the mother board 1 behind the box is in a vacuum state, the free fluorine-containing plasma 40 will quickly and fully enter the inside of the mother board 1 to break the vacuum effect and fill the display The middle of the panel 10 is thus in contact with the exposed surface of the sealant and the alignment film. Because the fluorine-containing plasma 40 has a relatively high molecular weight, it is easier to adhere to the contact surface, and it is extremely stable in a normal temperature environment, and is not easy to be released.

After that, ultraviolet light 30 (UV) is used to pre-curing the frame sealant 14 on the mother board 1 after the box. As shown in Figures 3-1 and 3-2, the fluorine-containing plasma 40 will interact with the frame sealant. 14 React with the active groups on the surface away from the display area and react with the active groups on the exposed surfaces of the first alignment film 113 and the second alignment film 133 corresponding to the non-display area to form the first hydrophobic fluorocarbon film layer 151, respectively And a second hydrophobic fluorocarbon film layer 152.

Specifically, the mother board 1 after the cassette is transported to the UV curing equipment by a robot. As shown in FIG. 1, a mask 20 is used to block the display area to prevent the polarity of the liquid crystal 12 from being irradiated by the ultraviolet light 30. The mask 20 may be a quartz mask or a glass mask.

As shown in FIGS. 3-1 and 3-2, in this process, the surface of the frame sealant 14 and the first alignment film 113 are excited by ultraviolet light to generate active groups. The sealant 14 generally includes epoxy resin, acrylic resin, photoinitiator, coupling agent, thermal hardener, inorganic split body and other components. Under the irradiation of ultraviolet light 30, the photoinitiator generates light free radicals (the free radicals generated by different types of initiators are slightly different), while epoxy resin and acrylic resin generate active groups, such as terminal hydroxyl groups, terminal carboxyl groups, and terminal amino groups. , Terminal carbonyl, terminal sulfhydryl, etc. At the same time, alignment films, such as polyimide film alignment films, are prone to breakage of molecular chains under ultraviolet light irradiation, thereby forming a variety of active groups, such as terminal amino groups, terminal carboxyl groups, terminal hydroxyl groups, terminal carbonyl groups, and terminal sulfhydryl groups. The above-mentioned active group bonds and reacts with the fluorine-containing plasma 40 to obtain a hydrophobic fluorocarbon film.

The pre-curing of the frame sealant can use ultraviolet light 30 with a wavelength of 190 to 280 nm, such as ultraviolet light 30 with a wavelength of 254 nm, so that more active groups can be obtained. In FIG. 3-1, only the first alignment film 113 is taken as an example. It can be understood that the state of the active groups on the surface of the second alignment film 133 and the fluorine-containing plasma 40 is the same as that of the first alignment film 113. In the figure, the fluorine-containing plasma 40 formed by CF _{4 is taken} as an example. It can be understood that the fluorine-containing plasma 40 of the present application may also be a fluorine-containing plasma formed by other fluorine-containing gases.

During the pre-curing process, use ultraviolet light 30 with a wavelength of 190 to 280 nm, for example, ultraviolet light with a wavelength of 254 nm. When the frame sealant 14 is cured, active groups will be generated on the surface of the frame sealant 14: terminal hydroxyl, terminal carboxyl, terminal Amino and so on. Active groups such as terminal amino groups, terminal carboxyl groups, terminal hydroxyl groups, and terminal carbonyl groups are also generated on the surface of the alignment films 113 and 133 when excited by ultraviolet light. The fluorine-containing plasma 40 easily bonds with the above-mentioned active groups, thereby forming the first hydrophobic fluorocarbon attached to the surface of the frame sealant 14 away from the outside of the display area and the alignment films 113, 133 on the exposed surfaces outside the display area The film layer 151 and the second hydrophobic fluorocarbon film layer 152.

The partial distribution schematic diagram of the first hydrophobic fluorocarbon film layer 151 and the second hydrophobic fluorocarbon film layer 152 formed above is shown in FIG. 4. 4 takes the first alignment film 113 and the second alignment film 133 directly contacting the frame sealant 14 as an example. It can be understood that the first alignment film 113, the second alignment film 133 and the frame sealant 14 may also contain other Floor. If other layers are included, the hydrophobic fluorocarbon film layer is formed only on the cross section of the first alignment film 113 and the second alignment film 133. During this reaction process, no by-products are produced, and the fluorine-containing plasma 40 that has not participated in the reaction continues to be free inside the motherboard 1.

Then, after the hydrophobic fluorocarbon film layer is formed, the pre-cured frame sealant is thermally cured, and the pre-cured frame sealant 14 is further cured. For example, the sealant 14 can be thermally cured in a closed room at a temperature of 110°C-150°C, such as 120°C. Thermal curing at this temperature can simultaneously evaporate and collect small molecular substances, such as by-products during UV curing and free fluorine-containing plasma 40, into the recovery system, thereby ensuring that the environment is not polluted.

In the embodiments of the present application, the fluorine-containing plasma treatment process involves breaking the vacuum after the substrate is placed on the box. Because the cell alignment needs to be performed under vacuum conditions, the purpose is to avoid bubbles in the display area from affecting the display. At the same time, in order to make the liquid crystal diffuse smoothly and evenly in the display area, it is necessary to slowly inject nitrogen or air into the substrate after the cell is formed. At the same time, the non-display area of the substrate and the external pressure are consistent. Generally, the gas used for breaking the vacuum after the substrate is paired with the box is nitrogen or air. This application only needs to replace nitrogen or air with fluorine-containing plasma and adjust the wavelength of ultraviolet light to 190nm-280nm, such as 254nm, to form a hydrophobic fluorocarbon film with hydrophobic or even superhydrophobic characteristics, without adding additional The process simplifies the manufacturing process of the display panel.

As another example, the display panel is an organic light emitting display panel, and the organic light emitting display panel includes a base substrate and a cover plate for forming a display area and a non-display area.

Wherein, forming a sealant and a first hydrophobic fluorocarbon film layer in the non-display area of the display panel body includes:

Coating sealant on the non-display area of the organic light emitting display panel.

The base substrate and cover plate of the organic light emitting display panel are aligned in a vacuum environment.

Provide fluorine-containing plasma.

The frame sealant is pre-cured by ultraviolet light, and the fluorine-containing plasma reacts with the active groups on the surface of the frame sealant away from the display area to form a first hydrophobic fluorocarbon film layer.

The fluorine-containing plasma can be provided by passing into a vacuum environment to break the vacuum after the base substrate and the cover plate are placed in a vacuum environment (the prior art will break the vacuum by passing nitrogen or air). It can be seen that the fluorine-containing plasma can not only be used to form a hydrophobic fluorocarbon film, but also can be used to break the vacuum environment when the box is aligned, simplify the preparation process, and has high advantages.

It is understandable that the process and principle of forming the first hydrophobic fluorocarbon film layer on the organic light emitting display panel are similar to the process and principle of forming the first hydrophobic fluorocarbon film layer on the liquid crystal display panel. The difference is only in the structure of the organic light emitting display panel and the structure of the liquid crystal display panel. The differences on the above will not be repeated here.

When the frame sealant is pre-cured by ultraviolet light, the wavelength of the ultraviolet light used is 190nm-280nm, for example, it can be 254nm to obtain more active groups. It is understandable that the active groups involved in the examples of the present application are selected from at least one of terminal amino groups, terminal carboxy groups, terminal hydroxyl groups, terminal carbonyl groups, and terminal mercapto groups.

The fluorine-containing plasma used includes at least one of CF ₄ plasma, CHF ₃ plasma, C ₂ HF ₅ plasma, and C ₄ F ₈ plasma.

It can be understood that the above-mentioned fluorine-containing plasma is obtained by ionizing fluorine-containing compounds, such as CF ₄ , CHF ₃ , C ₂ HF ₅ , and C ₄ F ₈ .

In another aspect, an embodiment of the present application also provides a display device, which includes any of the above-mentioned display panels.

Based on the use of the hydrophobic display panel provided by the embodiments of the present application, the display device can work stably in a high-temperature and high-humidity environment without water vapor penetration, and has a relatively long service life.

For example, the display device provided by the embodiment of the present application may include the above-mentioned display panel. The display device may be: electronic paper, mobile phone, tablet computer, television, monitor, notebook computer, digital photo frame, navigator, etc. Functional products or components.

For example, the display device provided by the embodiment of the present application is a vehicle-mounted type, such as a vehicle-mounted navigator, 2 which has stronger stability and longer service life.

The above descriptions are only preferred embodiments of this application and are not intended to limit this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection of this application. Within range.

Claims (20)

1. A display panel, including: a display panel body having a display area and a non-display area;

   Frame sealing glue, located in the non-display area;

   The first hydrophobic fluorocarbon film layer is located on the surface of the frame sealant away from the display area.
2. The display panel of claim 1, wherein the display panel is a liquid crystal display panel.
3. The display panel of claim 2, wherein the display panel body comprises: a first substrate;

   A second substrate opposite to the first substrate, and the display area and the non-display area are formed between the first substrate;

   The liquid crystal is located in the display area.
4. 3. The display panel of claim 3, wherein the first substrate includes a first alignment film, and the second substrate includes a second alignment film;

   The display panel further includes: a second hydrophobic fluorocarbon film layer on the exposed surfaces of the first alignment film and the second alignment film corresponding to the non-display area.
5. 3. The display panel of claim 2, wherein one of the first substrate and the second substrate is a color filter substrate, and the other is an array substrate.
6. The display panel of claim 1, wherein the display panel is an organic light emitting display panel.
7. The display panel according to claim 6, wherein the display panel body comprises: a base substrate;

   A cover plate opposite to the base substrate, and the display area and the non-display area are formed between the base substrate;

   The organic light emitting display layer is located in the display area.
8. 8. The display panel according to any one of claims 1-7, wherein the water contact angle of the first hydrophobic fluorocarbon film layer is greater than 150°.
9. A method for manufacturing a display panel includes: forming a display panel body;

   Forming the frame sealant and the first hydrophobic fluorocarbon film layer in the non-display area of the display panel body includes: pre-curing the frame sealant in the non-display area under the action of ultraviolet light, and making the fluorine-containing plasma React with the active groups on the surface of the frame sealant away from the display area to form a first hydrophobic fluorocarbon film layer;

   The active group is generated by excitation of the ultraviolet light.
10. The method for manufacturing a display panel according to claim 9, wherein the display panel is a liquid crystal display panel, and the display panel body includes: a first substrate and a second substrate for forming the display area and the non-display area Two substrates;

    The forming the frame sealant and the first hydrophobic fluorocarbon film layer in the non-display area of the display panel body includes:

    Coating frame sealant on the non-display area;

    Aligning the first substrate and the second substrate in a vacuum environment;

    Provide fluorine-containing plasma;

    The frame sealant is pre-cured by ultraviolet light, and the fluorine-containing plasma reacts with the active groups on the surface of the frame sealant away from the display area to form a hydrophobic fluorocarbon film layer.
11. 10. The method for manufacturing a display panel according to claim 10, wherein the first substrate includes a first alignment film, and the second substrate includes a second alignment film;

    The fluorine-containing plasma also reacts with active groups of the first alignment film and the second alignment film corresponding to the exposed surfaces of the non-display area to form a first hydrophobic fluorocarbon film layer.
12. The method for manufacturing a display panel according to claim 9, wherein the display panel is an organic light emitting display panel, and the display panel body includes: a base substrate for forming the display area and the non-display area, and Cover

    The forming the frame sealant and the first hydrophobic fluorocarbon film layer in the non-display area of the display panel body includes:

    Coating frame sealant on the non-display area;

    Aligning the base substrate and the cover plate in a vacuum environment;

    Provide fluorine-containing plasma;

    The frame sealant is pre-cured by ultraviolet light, and the fluorine-containing plasma reacts with the active groups on the surface of the frame sealant away from the display area to form a hydrophobic fluorocarbon film layer.
13. 9. The method of manufacturing a display panel according to claim 9, wherein the method further comprises: thermally curing the pre-cured frame sealant after forming the hydrophobic fluorocarbon film layer.
14. 9. The method for manufacturing a display panel according to claim 9, wherein the wavelength of the ultraviolet light is 190nm-280nm.
15. The method for manufacturing the display panel according to claim 14, wherein the wavelength of the ultraviolet light is 254 nm.
16. The method for manufacturing a display panel according to claim 9, wherein the fluorine-containing plasma comprises: CF ₄ plasma, CHF ₃ plasma, C ₂ HF ₅ plasma, and C ₄ F ₈ plasma At least one of them.
17. The method for manufacturing a display panel according to claim 9, wherein the active group is selected from at least one of a terminal amino group, a terminal carboxyl group, a terminal hydroxyl group, a terminal carbonyl group, and a terminal mercapto group.
18. A display device, wherein the display device comprises the display panel according to any one of claims 1-8.
19. 18. The display device of claim 18, wherein the display device is an electronic paper, a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, or a navigator.
20. The display device according to claim 18, wherein the display device is a vehicle-mounted type.

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