CN111290056B - Peep-proof film, preparation method thereof and display panel - Google Patents
Peep-proof film, preparation method thereof and display panel Download PDFInfo
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- CN111290056B CN111290056B CN202010196640.XA CN202010196640A CN111290056B CN 111290056 B CN111290056 B CN 111290056B CN 202010196640 A CN202010196640 A CN 202010196640A CN 111290056 B CN111290056 B CN 111290056B
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- G—PHYSICS
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
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- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- 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
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- 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
- G09F9/35—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 liquid crystals
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- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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Abstract
The application provides a peep-proof membrane, a preparation method thereof and a display panel, wherein the peep-proof membrane comprises: the shading sheet comprises a curing substrate layer and a plurality of shading sheets distributed in the curing substrate layer; the shading sheet bodies are all arranged along the thickness direction of the solidified substrate layer; the light transmittance of the shading sheet body is smaller than that of the solidified base material layer. The application provides a peep-proof membrane, the thickness direction of a plurality of inboard shading lamellar bodies of solidification substrate is all perpendicular with the thickness direction of solidification substrate layer, guarantees that the emergent light is along the thickness direction light-emitting that penetrates the solidification substrate layer, and can not cause the emergent light to shelter from, under same luminescent conditions, compares the transmittance height in traditional peep-proof membrane visual area, can be when preventing that information from revealing, has increased demonstration luminance to promote the user and use experience.
Description
Technical Field
The application relates to the technical field of display, in particular to a peep-proof film, a preparation method thereof and a display panel.
Background
With the development of science and technology and the improvement of the living standard of people, digital products become necessary products for the life of people, and provide a lot of convenience and pleasure for work and life. But the digital product brings convenience and entertainment to people and brings a plurality of hidden dangers. Because the visual angle of the current display screen is large, the privacy of the person is easily revealed by peeping of the person. Therefore, a peep-proof film is essential to prevent information leakage when using digital products.
The traditional peep-proof film utilizes an optical principle and adopts a superfine shutter structure, and the structure has a certain peep-proof effect, but has low light transmittance and can cause visual fatigue after long-term use.
Disclosure of Invention
The application aims at the defects of the existing mode and provides the peep-proof film, the preparation method of the peep-proof film and the display panel so as to solve the problem that the existing peep-proof film is low in light transmittance.
According to a first aspect of embodiments of the present application, there is provided a privacy film comprising: the shading sheet body comprises a curing base material layer and a plurality of shading sheet bodies distributed in the curing base material layer; the shading sheet body is of a sheet structure, and the thickness direction of the shading sheet body is perpendicular to the thickness direction of the curing base material layer; the light transmittance of the shading sheet body is smaller than that of the solidified base material layer.
As an alternative implementation, the cured substrate layer comprises a first substrate surface and a second substrate surface that are parallel; the thickness direction of the shading sheet body comprises shading surfaces which are oppositely arranged, and the shading surfaces are rectangular; the width direction of the shading sheet body is perpendicular to the surface of the first base material layer and the second base material layer, and the length direction of the shading sheet body is parallel to the surface of the first base material layer and the second base material layer; the both ends along width direction of shading lamellar body are first end and second end respectively, the second end with second substrate surface parallel and level, first end with leave the preset interval between the first substrate surface.
As an optional implementation mode, the preset distance is 10-25 micrometers.
As an optional implementation manner, the thickness of the shading sheet body is 15-30 nanometers, the length is 20-50 micrometers, and the width is 10-15 micrometers; and the thickness of the base material layer is 25-40 microns.
As an optional implementation mode, the distribution density of the projections of the plurality of shading sheet bodies on the surface of the second base material is 800-1000 per square centimeter.
As an optional implementation manner, the arrangement shape of the projections of the plurality of light-shielding sheets on the surface of the second substrate includes: one of a grid, a zigzag, or a spiral; alternatively, a plurality of the light-shielding sheet bodies are uniformly distributed in the curing substrate layer.
As an optional implementation manner, the cured substrate layer is an ultraviolet cured material film layer, and the light-shielding sheet body is cobaltosic oxide with a sheet structure.
According to a second aspect of embodiments of the present application, there is provided a method for preparing a privacy film, including: mixing a plurality of shading sheet bodies with a liquid material to be solidified to form a first mixed liquid; the shading sheet body is of a sheet structure, and the material of the shading sheet body has ferromagnetism;
coating the first mixed solution on the surface of a support substrate to form a coating layer;
applying a magnetic field to the coating layer to pull the plurality of light shielding sheet bodies to be perpendicular to the coating layer, so that the thickness direction of the light shielding sheet bodies is perpendicular to the thickness direction of the coating layer;
and curing the coating layer, and removing the support substrate to obtain a cured base material layer.
As an optional implementation manner, the light shielding sheet body is flake-structured cobaltosic oxide, and the preparation process of the flake-structured cobaltosic oxide includes: sequentially adding cetyl trimethyl ammonium bromide, strong ammonia water and deionized water with preset dosage into a container containing cobalt nitrate hexahydrate to form a second mixed solution with a preset molar concentration ratio;
stirring the second mixed solution, placing the second mixed solution into a microwave reaction container, performing microwave reaction under preset conditions, standing and cooling to obtain a first reaction product;
centrifuging and washing the first reaction product, and drying in an oven to obtain precursor powder;
and placing the precursor powder in a muffle furnace for calcination treatment, and cooling to room temperature to obtain the cobaltosic oxide with the sheet structure.
As an optional implementation manner, after the first mixed liquid is coated on the surface of the support substrate to form a coating layer; and, prior to applying the magnetic field to the coating layer, comprising:
and applying ultrasonic waves with preset conditions to the coating layer.
According to a third aspect of embodiments of the present application, there is provided a display panel including: a display module and the anti-peeping film of the first aspect; the display module is an organic electroluminescent module or a liquid crystal light-emitting module.
The technical scheme provided by the embodiment of the application has the following beneficial technical effects:
the utility model provides a peep-proof membrane, the thickness direction of a plurality of shading lamellar bodies in the solidification substrate layer all is perpendicular with the thickness direction of solidification substrate layer, guarantees that the emergent light is along the thickness direction light-emitting that penetrates the solidification substrate layer, and can not lead to the fact the sheltering from to the emergent light, under same luminescent condition, compares the transmittance height in traditional peep-proof membrane visual area, can be when preventing information leakage, has increased display brightness to promote user's use and experience.
The display panel provided by the embodiment of the application comprises the peep-proof films in the embodiments, emergent light of the display panel can be adjusted to be emitted along the thickness direction of the peep-proof films by utilizing the peep-proof films, the visual range is reduced, and therefore the peep-proof effect is achieved; and the light-emitting brightness of the display module is not influenced, so that the user experience is favorably improved.
Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic perspective structural view of a peep-proof film provided in an embodiment of the present application;
fig. 2 is a schematic cross-sectional view of a privacy film provided in an embodiment of the present application, the cross-sectional view being perpendicular to a thickness direction;
fig. 3 is a sectional view of a privacy film provided by an embodiment of the present application, taken along a thickness direction;
fig. 4 is a cross-sectional view of another privacy film provided by an embodiment of the present application, taken along the thickness direction;
fig. 5 is a schematic view of the arrangement shape of the projection of the light-shielding sheet body on the surface of the second substrate in the privacy film provided by the embodiment of the present application;
fig. 6 is a flowchart of a method for manufacturing a privacy film according to an embodiment of the present disclosure;
fig. 7 is a flowchart of a method for preparing cobaltosic oxide with a flake structure according to an embodiment of the present application;
fig. 8 is a schematic view of an internal structure of a display panel according to an embodiment of the present disclosure.
Wherein:
10-a peep-proof membrane;
1-a light-shielding sheet body; 101-a first end; 102-a second end; 103-shading surface;
2-curing the substrate layer; 201-a first substrate surface; 202-a second substrate surface;
11-a display module;
3-an anode;
4-a hole injection layer; 5-a hole transport layer; 6-a light emitting layer; 7-an electron transport layer; 8-doping layer;
9-cathode.
Detailed Description
Reference will now be made in detail to the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts or parts having the same or similar functions throughout. In addition, if a detailed description of the known art is not necessary for illustrating the features of the present application, it is omitted. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.
It will be understood by those within the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
The inventor of the application discovers that the conventional peep-proof film utilizes the optical principle in physics and adopts the ultra-fine shutter structure, so that the range of reflecting light rays emitted into display equipment such as a mobile phone or a computer screen is reduced, and most of the light rays only return along the incident direction. Due to the existence of the peep-proof structure of the shutter, only a small part of light can be reflected out and enter the eyes of a user to form an image, so that the light intensity is insufficient, and the user can find that the screen brightness is much lower than that under the normal condition. Although the peep-proof film does not release substances harmful to the eyesight of the human eyes and can not directly affect the eyesight of the human eyes, the peep-proof film easily causes visual fatigue when staring at a mobile phone or a computer screen with low light for a long time to work, certain adverse effect is caused on the eyesight of the human eyes, and the cruising ability of equipment is reduced by brightening the screen.
Based on this, this application has provided a peep-proof membrane, utilizes the shading lamellar body as shading material, all arranges a plurality of shading lamellar bodies along the thickness direction of peep-proof rete, can reduce sheltering from to emergent ray to solve the problem that traditional peep-proof membrane transmission light intensity is low.
The following describes the technical solutions of the present application and how to solve the above technical problems with specific embodiments.
As shown in fig. 1 and 2, an embodiment of the present application provides a privacy film, including: a cured substrate layer 2 and a plurality of light-shielding sheet bodies 1.
Wherein, shading lamellar body 1 is the lamellar structure, and shading lamellar body 1 distributes inside the solidification substrate layer, and the thickness direction of every shading lamellar body 1 all is perpendicular with the thickness direction of solidification substrate layer 2. The light transmittance of the light-shielding sheet 1 is smaller than that of the cured substrate layer.
The peep-proof membrane 10 that this embodiment provided, the thickness direction of a plurality of shading lamellar bodies 1 all is perpendicular with the thickness direction of solidification substrate layer 2, guarantees that the emergent light is along the thickness direction light-emitting that penetrates solidification substrate layer 2, and can not cause the emergent light and shelter from, under same luminescent conditions, compares the transmittance height in the 10 visual areas of traditional peep-proof membrane, can increase and show luminance when preventing information leakage, promotes the user and uses experience.
In this embodiment, the cured substrate layer 2 is a film main body structure of the peep-proof film 10, and can be regarded as a transparent film structure with uniform thickness. Arrange a plurality of shading lamellar bodies 1 in advance in solidification substrate layer 2's inside, because the luminousness of shading lamellar body 1 is less than the luminousness of solidification substrate layer 2, compare in the solidification substrate layer 2 that does not arrange shading lamellar body 1, can reduce the light of following the side ejection of solidification substrate layer, guarantee that light jets out along the thickness direction of solidification substrate layer 2 as far as possible to play the peep-proof effect.
It is understood that, since the light-shielding sheet body 1 in the present embodiment is a sheet-like structure, the thickness thereof is negligible with respect to the length or width. Taking the cured substrate layer 2 as an example, the thickness direction of the light-shielding sheet 1 is perpendicular to the thickness direction of the cured substrate layer 2, which is equivalent to the arrangement of the light-shielding sheet 1 in the vertical direction.
The plurality of light-shielding sheet bodies 1 refers to one or a plurality of light-shielding sheet bodies 1, and the number of light-shielding sheet bodies 1 in the present embodiment is determined according to the area of the light-emitting side of the cured substrate layer 2, and is not particularly limited here.
In some embodiments, the cured substrate layer 2 is a uv curable material film layer, and the light-shielding sheet 1 is a sheet-like structure of cobaltosic oxide.
The ultraviolet curing material film is a film formed by curing an ultraviolet curing material by Ultraviolet (UV), and before the ultraviolet curing, the ultraviolet curing material film is generally in a liquid state, such as: a paint layer, an ink layer or an adhesive layer which can be cured by ultraviolet rays. The ultraviolet curing material in this embodiment is epoxy resin, and the epoxy resin is cured by ultraviolet rays to obtain the cured substrate layer 2. Compared with the ultraviolet curing material film layer formed by ultraviolet curing, the ultraviolet curing material film layer can reduce the fluidity of the material before curing and is beneficial to positioning the shading sheet body 1; compared with natural curing, the curing efficiency can be improved, and the preparation time can be shortened.
The light-shielding sheet body 1 in the embodiment adopts the flake-shaped cobaltosic oxide, on one hand, the flake-shaped cobaltosic oxide is a regular flake-shaped material, so that the light-shielding requirement of lateral light outgoing can be met; on the other hand, as the cobaltosic oxide has magnetism, the cobaltosic oxide in each sheet structure can be magnetized to be drawn to be positioned in a vertical state in the process of preparing the peep-proof film 10. The thickness of the cobaltosic oxide with a sheet structure is nano-scale, so that the light transmission influence on emergent light can be reduced as much as possible
In the embodiments of the present application, the light-shielding sheet 1 may be a sheet-like structure of tricobalt tetraoxide, and the cured substrate layer 2 may be an ultraviolet-curable material film.
In addition to the above embodiments, the inventors of the present application considered that, in order to improve the peep-proof effect, in the case of the same number of light-shielding sheets, the extending direction of the longest side of the light-shielding sheet may be arranged perpendicular to the thickness direction of the cured substrate layer 2. To this end, the present application provides one possible implementation of the privacy film 10 as follows:
as shown in fig. 1 to 4, the cured substrate layer 2 includes a first substrate surface 201 and a second substrate surface 202 which are parallel;
the thickness direction of the light shielding sheet body 1 includes two light shielding surfaces 103 arranged oppositely, and the shape of the light shielding surfaces 103 is rectangular, that is, the light shielding sheet body 1 is a regular sheet structure with a rectangular projection shape. The width direction of the light-shielding sheet body 1 is perpendicular to the first substrate surface 201 and the second substrate surface 202, and the length direction of the light-shielding sheet body 1 is parallel to the first substrate surface 201 and the second substrate surface 202.
The two ends of the width direction of the light-shielding sheet body 1 are respectively a first end 101 and a second end 102, the second end 102 is flush with the second substrate surface 202, and a preset distance is left between the first end 101 and the first substrate surface 201.
In this embodiment, the length direction of the light-shielding sheets is arranged in parallel with the first substrate surface 201 and the second substrate surface 202, and under the condition of the same number of light-shielding sheet bodies 1, the blocking effect on the emergent rays which are not parallel to the cured substrate layer 2 can be increased, which is beneficial to further improving the peep-proof effect; one end of the shading sheet body 1 is flush with one surface of the curing substrate layer 2, and the other end of the shading sheet body is away from the other surface of the curing substrate layer 2 by a certain distance, so that emergent rays can be emitted in a direction parallel to the shading sheet body 1 as far as possible, natural light can enter the shading sheet body, and the display effect is improved; when the peep-proof function is played, a certain visual angle is reserved properly, and the visual experience is increased.
Specifically, the light-shielding sheet 1 is a sheet structure, and the light-shielding sheet 1 is arranged in the vertical direction in fig. 3 and 4, that is, the two light-shielding surfaces 103 are arranged along the thickness direction of the cured substrate layer 2. The two light shielding surfaces 103 are respectively used for shielding light rays emitted from one side of the light shielding sheet to the other side, so that a peep-proof effect is achieved.
In this embodiment, the length direction of the light-shielding sheet 1 is the extending direction of the longest side of the light-shielding sheet 1, and fig. 3 is the width direction of the rectangular cross section of the light-shielding sheet 1; the width direction of the light-shielding sheet 1 is the extending direction of only the second long side smaller than the longest side of the light-shielding sheet 1, and the height direction of the rectangular cross section of the light-shielding sheet 1 is shown in fig. 3. In the light-shielding sheet body 1 having the rectangular light-shielding surface 103, the longitudinal direction of the light-shielding sheet body 1 is perpendicular to the width direction.
Further, the first substrate surface 201 in the present embodiment refers to the upper surface of the cured substrate layer 2 in fig. 3 and 4, and the second substrate surface 202 refers to the lower surface of the cured substrate layer 2 in fig. 3. The second end 102 of the light-shielding sheet 1 is flush with the second substrate surface 202, that is, the second end 102 is located in the lower surface of the cured substrate layer 2, and a preset distance is left between the first end 101 and the upper surface of the cured substrate layer 2.
For example, if the light of the display panel enters from the lower surface of the cured substrate layer 2 and exits from the upper surface, the structural design in the present embodiment can prevent the deflection between the lower surface of the light cured substrate layer 2 and the second end 102 of the light shielding sheet 1, so that the exiting light exits in a direction parallel to the light shielding sheet 1 as much as possible; moreover, a space is reserved between the first end 101 and the solidified substrate layer 2, so that natural light can enter the space, and the display effect is improved; and a certain visual angle is reserved properly while the peep-proof effect is achieved, so that the visual experience is increased.
In some embodiments, the predetermined spacing between the first end 101 and the first substrate surface 201 of the cured substrate layer 2 is between 10 microns and 25 microns (inclusive). If the preset distance is too large, the emergent light sheet can be deflected to the side surface to be emitted, which is not beneficial to peep prevention; the preset distance is too small, which is not beneficial to increasing visual experience.
In some embodiments, with continued reference to fig. 3 and 4, the thickness d of the light-shielding sheet 1 is 15 nm to 30 nm, the length a is 20 μm to 50 μm, and the width b is 10 μm to 15 μm. Meanwhile, the thickness h of the base material layer is 25-40 microns.
Note that the thickness d of the light-shielding sheet body 1 includes end points of 15 nm and 30 nm, the length a of the light-shielding sheet body 1 includes end points of 20 μm and 50 μm, and the width b of the light-shielding sheet body 1 includes end points of 10 μm and 15 μm. The thickness h of the substrate layer includes 25 microns and 40 microns, inclusive.
On the basis of the above embodiments, in order to increase the peep-proof effect, the number of the light-shielding sheet bodies 1 may be increased appropriately, and theoretically, the peep-proof effect is better as the number is larger, but it is considered that the light-emitting effect of the peep-proof film 10 may be affected by the too large number of the light-shielding sheet bodies 1. Therefore, the number of the light-shielding sheets 1 needs to be arranged at a certain density.
In this embodiment, the distribution density of the projections of the plurality of light-shielding sheet bodies 1 on the second substrate surface 202 is 800-1000 per square centimeter, and the privacy film 10 in this density distribution range can achieve a better privacy effect on the premise of comprehensively considering the light-emitting effect.
In some of the above embodiments, the arrangement shape of the projection of the plurality of light-shielding sheets 1 on the second substrate surface 202 includes: one of a grid, a zigzag, or a spiral.
Taking a grid as an example for explanation, as shown in fig. 5, the second ends 102 of the plurality of light-shielding sheet bodies 1 are arranged in a grid manner as shown in the figure, the arrangement structure can ensure uniformity of light emission, and a single grid is surrounded by four light-shielding sheet bodies 1, and light is emitted perpendicularly from an area between the four light-shielding sheet bodies 1, which is beneficial to enhancing the peep-proof effect.
Optionally, in order to improve the light-emitting effect of the peep-proof film 10, the plurality of light-shielding sheets 1 may be uniformly distributed in the cured substrate layer 2, such as: parallel array arrangement or circumferential array arrangement.
Based on the same inventive concept, as shown in fig. 6, the embodiment of the present application further provides a method for preparing a peep-proof membrane 10, which includes steps S101 to S104:
s101, mixing a plurality of shading sheet bodies with a liquid material to be solidified to form a first mixed solution; the shading sheet body is of a sheet structure, and the material of the shading sheet body has ferromagnetism.
Optionally, the liquid material to be solidified has a certain viscosity, and according to the actual manufacturing specification of the anti-peeping membrane 10, a plurality of light-shielding sheet bodies 1 with sheet structures are added into the liquid material to be solidified and mixed to obtain a first mixed liquid. The mixture can be properly stirred during the mixing process to improve the distribution uniformity of the shading sheet bodies in the coating layer. In order to facilitate the subsequent change of the arrangement direction of the light-shielding sheet body through magnetization, the material of the light-shielding sheet body in this embodiment needs to have ferromagnetism, such as: tricobalt tetroxide or ferroferric oxide. Since the light-shielding sheet body has a sheet-like structure, the embodiment will be described by taking cobaltosic oxide, in which the light-shielding sheet body has a sheet-like structure, as an example.
Optionally, the material to be cured in this embodiment is an ultraviolet material to be cured, that is, it may be cured by ultraviolet rays subsequently.
S102, coating the first mixed solution on the surface of the support substrate to form a coating layer.
Alternatively, the supporting substrate is a transparent film substrate, and may be made of PET (polyester), PMMA (polymethyl methacrylate), PVC (polyvinyl chloride), PC (polycarbonate), PS (polystyrene), or PE (polyethylene), and the like, so as to serve as a base material of the coating layer.
S103, applying a magnetic field to the coating layer to pull the plurality of light shielding sheet bodies to be vertical to the coating layer, so that the thickness direction of the light shielding sheet bodies is vertical to the thickness direction of the coating layer.
Optionally, before the coating layer is cured, a magnetic field is applied above the coating layer, the magnetic field is used to magnetize the cobaltosic oxide of the sheet-like structures, so that the cobaltosic oxide of each sheet-like structure is arranged in an upright state (in the thickness direction of the coating layer), and the cobaltosic oxide of each sheet-like structure can be pre-positioned by combining the magnetic field due to certain viscosity of the material to be cured of the coating layer.
And S104, curing the coating layer, and removing the support substrate to obtain a cured base material layer 2.
Optionally, an optimum curing means is selected for curing, depending on the properties of the material to be cured. In this embodiment, when the material to be cured may be a material to be cured by ultraviolet light, the corresponding curing manner is ultraviolet curing. After the coating layer is cured, the support substrate is removed or the cured coating layer is peeled off from the support substrate, thereby obtaining the cured base material layer 2 including the cobaltosic oxide having a sheet-like structure, that is, the privacy film 10 in the foregoing embodiment.
Based on the content of the foregoing embodiments, as shown in fig. 7, this embodiment further provides a process for preparing flake-structured cobaltosic oxide, where the flake-structured cobaltosic oxide is prepared by a microwave method, and the process includes steps S201 to S204:
s201, sequentially adding cetyl trimethyl ammonium bromide, strong ammonia water and deionized water with preset dosage into a container containing cobalt nitrate hexahydrate to form a second mixed solution with a preset molar concentration ratio.
Optionally, adding cobalt nitrate hexahydrate into a three-neck flask, then sequentially adding cetyl trimethyl ammonium bromide and strong ammonia water, and finally adding deionized water to form a second mixed solution with a preset molar concentration ratio. In this embodiment, the molar concentration ratio of the cobalt nitrate hexahydrate, the cetyltrimethylammonium bromide and the concentrated ammonia water in the second mixed solution may be 40:1: 20.
S202, stirring the second mixed solution, placing the second mixed solution into a microwave reaction container, performing microwave reaction under preset conditions, standing and cooling to obtain a first reaction product.
Optionally, the second mixed solution in the three-neck flask is placed on a magnetic stirrer to be stirred for 10-15 min for standby, and the stirring speed is controlled at 150-. Placing the second mixed solution into a microwave reaction device, wherein the preset conditions of the microwave reaction device are as follows: the temperature is 50-60 ℃, the power is 300-400W, and the reaction time is 8-10 min. After the reaction is finished, standing and cooling to room temperature to obtain a first reaction product. The main component of the first reaction product is basic cobalt carbonate (Co)2(OH)2CO3)。
S203, centrifuging and washing the first reaction product, and drying in an oven to obtain precursor powder.
Optionally, in order to obtain a relatively pure precursor powder, the first reactant is further subjected to centrifugation and washing sequentially before being placed in the oven for heating.
And S204, calcining the precursor powder in a muffle furnace, and cooling to room temperature to obtain the cobaltosic oxide with the sheet structure.
Optionally, the precursor is placed in a muffle furnace, the calcining temperature is 260-290 ℃, and the calcining treatment time is 2 hours. And after calcining, cooling the precursor powder to room temperature to obtain the flaky structure cobaltosic oxide.
On the basis of the above embodiments, in order to increase the distribution uniformity of the cobaltosic oxide of the sheet-like structure in the coating layer, ultrasonic waves of preset conditions may be applied to the coating layer after step S102 and before step S103. The cobaltosic oxide with the sheet structure is uniformly distributed by utilizing ultrasonic waves, and the specific setting conditions of the ultrasonic waves are as follows: the power was 80W at room temperature for 15 minutes.
Based on the same inventive concept, the embodiment of the present application further provides a display panel, including: the display module and the peep-proof film 10 in the foregoing embodiments, the peep-proof film 10 is in direct contact with the outermost film layer of the display module, and other transparent film layers that do not affect the light transmittance may be disposed between the peep-proof film 10 and the outermost film layer of the display module. The display module in this embodiment may be an organic electroluminescent module, or may be a liquid crystal light emitting module.
In this embodiment, the display module is taken as an example of an organic electroluminescent module, and a detailed description is given to a display surface structure including the peep-proof film 10, as shown in fig. 8, the organic electroluminescent module sequentially includes, from bottom to top: anode 3, hole injection layer 4, hole transport layer 5, light emitting layer 6, electron transport layer 7, doping layer 8 and cathode 9. All the film layers in the organic electroluminescent module can be prepared by adopting the existing materials and processes, and detailed description is omitted here.
In this embodiment, the anti-peeping film 10 can be directly contacted with an encapsulation layer (not shown in the figure) on the cathode 9, and the fixation connection between the two can be realized by means of adhesion or hot pressing. Of course, the privacy film 10 may be in direct contact with the outermost cover layer of the display module. The emergent light of the light-emitting layer 6 of the organic electroluminescent module can not affect the brightness of the display panel after being emitted by the peep-proof film 10, and the emergent light is emitted perpendicular to the peep-proof film 10, so that the peep-proof effect is realized.
The display panel provided by the embodiment comprises the peep-proof films in the embodiments, and emergent light of the display panel can be adjusted to be emitted along the thickness direction of the peep-proof films by utilizing the peep-proof films, so that the visual range is reduced, and the peep-proof effect is achieved; and the light-emitting brightness of the display module is not influenced, so that the user experience is favorably improved.
The embodiments of the application have at least the following technical effects:
1. the utility model provides a peep-proof membrane, the thickness direction of a plurality of shading lamellar bodies in the solidification substrate layer all is perpendicular with the thickness direction along the solidification substrate layer, guarantees that the emergent light is along the thickness direction light-emitting that penetrates the solidification substrate layer, and can not lead to the fact the sheltering from to the emergent light, under same luminescent condition, compares traditional peep-proof membrane transmittance in the visual area high, can increase display brightness when preventing information leakage, promotes user's use and experiences.
2. The length direction of the shading sheets is perpendicular to the thickness direction of the solidified base material layer, so that the blocking effect on emergent rays which are not parallel to the solidified base material layer can be increased under the condition of the same number of shading sheets, and the peep-proof effect can be further improved; one end of the shading sheet body is flush with one surface of the curing substrate layer, and the other end of the shading sheet body is away from the other surface of the curing substrate layer by a certain distance, so that emergent rays can be emitted in a direction parallel to the shading sheet body as far as possible, natural light can enter the shading sheet body easily, and the display effect is improved; when the peep-proof function is played, a certain visual angle is reserved properly, and the visual experience is increased.
3. The ultraviolet curing material film is selected, so that compared with heating curing, the fluidity of the material before curing can be reduced, and the positioning of the shading sheet body is facilitated; compared with natural curing, the curing efficiency can be improved, and the preparation time can be shortened.
4. The cobaltosic oxide with the sheet structure is a regular sheet material, can meet the requirement of shielding lateral light, has magnetism, can magnetize the cobaltosic oxide with each sheet structure and pull the cobaltosic oxide to be positioned in a vertical state, and is favorable for manufacturing the peep-proof film.
5. The display panel provided by the embodiment of the application comprises the peep-proof films in the above embodiments, and emergent light of the display panel can be adjusted to be emitted along the thickness direction of the peep-proof films by using the peep-proof films, so that the visual range is reduced, and the peep-proof effect is achieved; and the light-emitting brightness of the display module is not influenced, so that the user experience is favorably improved.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is only a partial embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations should also be regarded as the protection scope of the present application.
Claims (8)
1. A privacy film, comprising: the shading sheet comprises a curing substrate layer and a plurality of shading sheets distributed in the curing substrate layer;
the shading sheet body is of a sheet structure;
the thickness directions of the shading sheet bodies are all perpendicular to the thickness direction of the solidified base material layer;
the light transmittance of the shading sheet body is smaller than that of the solidified base material layer;
the cured substrate layer comprises parallel first and second substrate surfaces; the shading sheet body comprises shading surfaces which are oppositely arranged, the shading surfaces are perpendicular to the thickness direction of the shading sheet body, and the shading surfaces are rectangular;
the width direction of the shading sheet body is vertical to the surface of the first base material and the surface of the second base material, and the length direction of the shading sheet body is parallel to the surface of the first base material and the surface of the second base material;
two ends of the shading sheet body in the width direction are respectively a first end and a second end, the second end is flush with the surface of the second substrate, and a preset distance is reserved between the first end and the surface of the first substrate; the preset distance is 10-25 microns.
2. The privacy film of claim 1, wherein the light-shielding sheet has a thickness of 15 to 30 nm, a length of 20 to 50 microns, and a width of 10 to 15 microns;
and the thickness of the base material layer is 25-40 microns.
3. The privacy film of claim 2, wherein the distribution density of the projections of the plurality of light-shielding sheets on the surface of the second substrate is 800-1000 per square centimeter.
4. The privacy film of claim 1, wherein the arrangement of the projections of the plurality of light-shielding sheets on the surface of the second substrate comprises: one of a grid, a zigzag, or a spiral;
alternatively, a plurality of the light-shielding sheet bodies are uniformly distributed in the cured substrate layer.
5. The privacy film of any one of claims 1-4, wherein the cured substrate layer is a UV-cured material film layer and the light-shielding sheet is a sheet-like structure of tricobalt tetraoxide.
6. A method for preparing a privacy film, comprising:
mixing a plurality of shading sheet bodies with a liquid material to be solidified to form a first mixed solution; the shading sheet body is of a sheet structure, and the material of the shading sheet body has ferromagnetism;
coating the first mixed solution on the surface of a support substrate to form a coating layer;
applying ultrasonic waves with preset conditions to the coating layer;
applying a magnetic field to the coating layer to pull the plurality of light shielding sheets to be perpendicular to the coating layer, so that the thickness direction of the light shielding sheets is perpendicular to the thickness direction of the coating layer;
curing the coating layer, and removing the support substrate to obtain a cured base material layer;
the cured substrate layer comprises a first substrate surface and a second substrate surface which are parallel; the shading sheet body comprises shading surfaces which are oppositely arranged, the shading surfaces are perpendicular to the thickness direction of the shading sheet body, and the shading surfaces are rectangular;
the width direction of the shading sheet body is vertical to the surface of the first base material and the surface of the second base material, and the length direction of the shading sheet body is parallel to the surface of the first base material and the surface of the second base material;
two ends of the shading sheet body along the width direction are respectively a first end and a second end, the second end is flush with the surface of the second substrate, and a preset distance is reserved between the first end and the surface of the first substrate; the preset distance is 10-25 microns.
7. The method for preparing a privacy film according to claim 6, wherein the light-shielding sheet is flake-structured cobaltosic oxide, and the preparation process of the flake-structured cobaltosic oxide comprises:
sequentially adding cetyl trimethyl ammonium bromide, strong ammonia water and deionized water with preset dosage into a container containing cobalt nitrate hexahydrate to form a second mixed solution with preset molar concentration ratio;
stirring the second mixed solution, placing the second mixed solution into a microwave reaction container, performing microwave reaction under preset conditions, standing and cooling to obtain a first reaction product;
centrifuging and washing the first reaction product, and drying in an oven to obtain precursor powder;
and placing the precursor powder in a muffle furnace for calcination treatment, and cooling to room temperature to obtain the cobaltosic oxide with the sheet structure.
8. A display panel, comprising: a display module and the privacy film of any one of claims 1-5;
the display module is an organic electroluminescent module or a liquid crystal light-emitting module.
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| CN114966927B (en) * | 2022-05-31 | 2024-02-02 | Tcl华星光电技术有限公司 | Peep-proof film and spliced panel |
| CN114966928B (en) * | 2022-05-31 | 2024-02-09 | Tcl华星光电技术有限公司 | Peep-proof film, preparation method thereof and spliced panel |
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| CN104730601A (en) * | 2015-03-26 | 2015-06-24 | 厦门烯成科技有限公司 | Peeping preventing film based on graphene and making method thereof |
| CN109387891A (en) * | 2017-08-09 | 2019-02-26 | 信越聚合物株式会社 | Light transmission direction controlling piece |
| CN109633793A (en) * | 2018-12-14 | 2019-04-16 | 青岛科技大学 | A kind of preparation method of peep-proof film |
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| CN106597727A (en) * | 2017-01-11 | 2017-04-26 | 北京大学 | Electronic control dimming film with adjustable angle scope of transmission light |
| CN110764173A (en) * | 2019-10-30 | 2020-02-07 | 京东方科技集团股份有限公司 | Peep-proof structure and display device |
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| CN104730601A (en) * | 2015-03-26 | 2015-06-24 | 厦门烯成科技有限公司 | Peeping preventing film based on graphene and making method thereof |
| CN109387891A (en) * | 2017-08-09 | 2019-02-26 | 信越聚合物株式会社 | Light transmission direction controlling piece |
| CN109633793A (en) * | 2018-12-14 | 2019-04-16 | 青岛科技大学 | A kind of preparation method of peep-proof film |
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