CN109880440B - Ink, ink-jet printing method, film packaging method and organic film - Google Patents
Ink, ink-jet printing method, film packaging method and organic film Download PDFInfo
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- CN109880440B CN109880440B CN201910199495.8A CN201910199495A CN109880440B CN 109880440 B CN109880440 B CN 109880440B CN 201910199495 A CN201910199495 A CN 201910199495A CN 109880440 B CN109880440 B CN 109880440B
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Abstract
The invention provides ink, an ink-jet printing method, a film packaging method and an organic film. The ink comprises electromagnetic response particles, and the adding proportion of the electromagnetic response particles is 2 to 20 electromagnetic response particles added in per cubic micron of ink. According to the invention, the electromagnetic response particles are added into the ink for ink-jet printing, and the movement of the electromagnetic response particles is controlled in an electromagnetic field mode, so that the movement of the ink is controlled, the leveling speed of the ink is accelerated, and the technical problem that the leveling speed of the ink is slow in the existing ink-jet printing process, so that the speed of the whole packaging process is seriously influenced is solved.
Description
Technical Field
The invention relates to the field of display panel packaging, in particular to ink, an ink-jet printing method, a film packaging method and an organic film.
Background
In a conventional display panel packaging process, an ink-jet printing method is usually used for preparing an organic film for packaging, and in the ink-jet printing process, the leveling speed of ink is slow, so that the speed of the whole packaging process is seriously influenced.
It is therefore desirable to provide a solution that can improve the ink leveling speed of inkjet printing.
Disclosure of Invention
In view of this, embodiments of the present invention provide an ink, an inkjet printing method, a thin film encapsulation method, and an organic thin film, so as to solve the technical problem that the leveling speed of the ink is slow in the existing inkjet printing process, thereby seriously affecting the speed of the entire encapsulation process.
According to an aspect of the present invention, there is provided an ink including electromagnetic-responsive particles added in a ratio of 2 to 20 electromagnetic-responsive particles per cubic micrometer of the ink.
In an embodiment, the electromagnetic responsive particles are selected from one of ferroferric oxide, ferric oxide, titanium dioxide, or any combination thereof.
In one embodiment, the diameter of the electromagnetically responsive particles is from 80 nm to 300 nm, preferably from 100 nm to 150 nm.
According to another aspect of the present invention, there is provided an inkjet printing method including: adding 2 to 20 electromagnetic responsive particles per cubic micron of ink to form an electromagnetic responsive ink; performing ink-jet printing by using the electromagnetic response ink to form an electromagnetic response film; an electromagnetic field pointing to the substrate is arranged on the electromagnetic response film to increase the leveling speed of the electromagnetic response film.
In one embodiment, forming the electromagnetic response ink includes: electromagnetic responsive particles are added to the ink in an atmosphere isolated from water, oxygen and light.
In an embodiment, the magnetic field lines of the electromagnetic field are all perpendicular to the substrate.
In an embodiment, the angle between the magnetic field lines of the electromagnetic field and the substrate increases gradually from the edge of the substrate to the center of the substrate, wherein the angle between the magnetic field lines at the edge of the substrate and the substrate ranges from no less than 45 degrees to less than 90 degrees, preferably from 60 degrees to 70 degrees.
In one embodiment, the electromagnetic field has an electric field strength in a range of 200V/cm to 500V/cm and a magnetic flux in a range of 200 Gauss to 500 Gauss.
According to an aspect of the present invention, there is provided a thin film encapsulation method including: preparing a first inorganic layer by chemical vapor deposition; preparing an organic layer on the first inorganic layer; preparing a second inorganic layer on the organic layer using chemical vapor deposition; wherein the ink jet printing method described above is used to prepare the organic layer on the first inorganic layer.
According to another aspect of the present invention, there is provided an organic thin film for thin film encapsulation of a display panel, wherein the organic thin film is formed by the above-described ink printing.
According to the ink, the ink-jet printing method, the thin film packaging method and the organic thin film provided by the embodiment of the invention, the electromagnetic response particles are added into the ink for ink-jet printing, and the movement of the electromagnetic response particles is controlled in an electromagnetic mode, so that the movement of the ink is controlled, the leveling speed of the ink is accelerated, and the technical problem that the leveling speed of the ink is slow in the existing ink-jet printing process, and the speed of the whole packaging process is seriously influenced is solved.
Drawings
Fig. 1 is a schematic flow chart of an inkjet printing method according to an embodiment of the present invention.
Fig. 2 is a schematic diagram illustrating an edge profile control of a thin film according to an embodiment of the invention.
Fig. 3 is a schematic flow chart illustrating a thin film encapsulation method according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An embodiment of the present invention provides an ink, wherein the ink includes electromagnetic-responsive particles, and the proportion of the electromagnetic-responsive particles added is 2 to 20 electromagnetic-responsive particles per cubic micrometer of ink.
In particular, the ink may be an ink for an inkjet printing process, which may have several basic features: firstly, the stability of the ink and the high solubility or even dispersion of the solute of the ink are ensured so as to ensure the stability of ink drops and the even film formation; secondly, the rheological property of the solution formed by the ink, including but not limited to viscosity, surface tension, shear rate and the like, needs to meet the requirements of ink-jet printing equipment, and stable liquid drops can be formed, wherein the liquid drops have no satellite spots, good repeatability, accurate positioning and the like.
Generally, after the ink jet printing process, the leveling speed of the ink is a great factor which often limits the ink jet printing process, and after the inventors have made a careful study, the inventors found that the movement direction of the ink can be controlled by adding the electromagnetic response particles to the ink and then applying an electromagnetic field to the ink to which the electromagnetic response particles are added, thereby controlling the leveling speed of the ink. The electromagnetic-responsive particles may be any particles that can generate an attractive force or a repulsive force with an electromagnetic field, and the present invention is not particularly limited thereto.
As for the addition ratio of the electromagnetic responsive particles, the inventors have found through a plurality of experimental practices that the addition ratio of the electromagnetic responsive particles in the ink is 2 to 20 electromagnetic responsive particles per cubic micrometer of the ink, which is the most preferable case. If less than 2 electromagnetic response particles are added to each cubic micron of ink, the added ink cannot be well controlled by the applied electromagnetic field; if more than 20 electromagnetic response particles are added per cubic micrometer of ink, the stability, viscosity, surface tension, etc. of the added ink are affected by the high density of electromagnetic response particles, and thus the basic characteristics of the ink are not satisfied.
In the ink in the embodiment, due to the addition of a proper amount of electromagnetic response particles, the properties of the ink are changed, and the ink has the function of inducing an electromagnetic field, so that the movement direction and speed of the ink can be controlled through the electromagnetic field, the leveling speed of the ink is controlled, and the frequent effect of an ink-jet printing process is shortened.
In an embodiment, the electromagnetic responsive particles are selected from one of ferroferric oxide, ferric oxide, titanium dioxide, or any combination thereof.
Since the electromagnetic response particles need to be induced with an electromagnetic field, after many experiments of the inventor, the material of the electromagnetic response particles can be ferroferric oxide, ferric oxide or titanium dioxide. In the three materials, a certain material may be used singly, for example, only the ferroferric oxide is used as the material of the electromagnetic response particles, or the three materials may be arranged and combined according to their types and contents to form the mixed electromagnetic response particles, for example, a combination of 40% of ferroferric oxide and 60% of ferric oxide, or a combination of 30%, 30% and 40% of ferroferric oxide, ferric oxide and titanium dioxide is used as the material of the electromagnetic response particles.
The ink in this embodiment is selected from one or any combination of ferroferric oxide, ferric oxide and titanium dioxide, and different proportions can be selected according to different requirements, so as to ensure that the ink maximally responds to an electromagnetic field without affecting the basic characteristics of the ink, thereby maximally increasing the leveling speed of the ink and shortening the frequent time of an inkjet printing process.
In one embodiment, the diameter of the electromagnetically responsive particles is from 80 nm to 300 nm, preferably from 100 nm to 150 nm.
Specifically, in order to ensure that the level characteristics of the ink do not change significantly, the size of the electromagnetically responsive particles needs to be within a certain range to achieve this requirement. For example, if the diameter of the electromagnetic response particle is smaller than 80 nm, the acting force between the added electromagnetic response particle and the ink itself is too small, even though the electromagnetic response particle can respond well to the electromagnetic field, the influence of the electromagnetic response particle on the movement of the ink is reduced due to the too small acting force between the electromagnetic response particle and the ink itself, and thus the effect of increasing the ink leveling speed cannot be achieved well; for another example, if the diameter of the electromagnetically responsive particles is greater than 300 nanometers, a level may occur where the electromagnetically responsive particles may be large enough to affect the level characteristics of the ink, and the viscosity, surface tension, shear rate, etc. of the ink may be affected, thereby negatively affecting the overall inkjet printing process.
Therefore, after a plurality of experimental practices of the inventor, the diameter limit values of the electromagnetic response particles are found to be 80 nanometers and 300 nanometers, and the diameter of the electromagnetic response particles between the two limit values, namely 80 nanometers to 300 nanometers, belongs to the practicable range. Within this practicable range, a preferred range is 100 nm to 150 nm. In laboratory data, the electromagnetic response particles of 110 nm are the optimal diameter size, which can ensure the basic characteristics of the ink to be excellent to the maximum extent, and the response to the electromagnetic field is also optimal.
The diameter of the added electromagnetic response particles of the ink in the embodiment is in a proper range, so that the ink can maximally respond to an electromagnetic field without influencing the basic characteristics of the ink, thereby maximally increasing the leveling speed of the ink and shortening the frequent time of an ink-jet printing process.
Fig. 1 is a schematic flow chart of an inkjet printing method according to an embodiment of the present invention, which specifically includes:
110: 2 to 20 electro-magnetically responsive particles per cubic micron of ink are added to form the electro-magnetically responsive ink.
The electromagnetic response particles are added into the ink used for common ink-jet printing, the addition amount is 2-20 electromagnetic response particles per cubic micron of ink, and the electromagnetic response particles can respond to an electromagnetic field, so the added ink becomes the electromagnetic response ink.
120: and performing ink-jet printing by using the electromagnetic response ink to form the electromagnetic response film.
The existing ink-jet printing technology is used for ink-jet printing, and the film formed after printing has electromagnetic response particles, so that the whole film can respond to an electromagnetic field to form the electromagnetic response film.
130: an electromagnetic field pointing to the substrate is arranged on the electromagnetic response film to increase the leveling speed of the electromagnetic response film.
After step 120, which is equivalent to entering the leveling stage, the existing method is to let the inkjet-printed film stand still, and after the entire film is leveled, enter the next stage of the process. In this embodiment, in the leveling stage, an electromagnetic field is applied, which is directed to the substrate, that is, the direction of the electromagnetic field is the same as that of the gravitational force, under the dual actions of the electromagnetic field and the gravitational force, the gravitational force toward the substrate is generated on the electromagnetic response particles in the ink, so that the electromagnetic response particles are accelerated toward the substrate, and the ink is driven to move toward the substrate in an accelerated manner, and the movement will cause each ink droplet to be extruded by the ink droplets on both sides of the ink droplet, so as to accelerate to move toward both sides, and thus the leveling speed of the entire electromagnetic response film is increased.
In the inkjet printing method in the embodiment, since the ink with the electromagnetic response particles is used and the electromagnetic field is applied in the leveling stage, the leveling speed of the whole inkjet printing process is accelerated, and in the test stage, the inventor finds that the time of the whole inkjet printing process can be shortened by about 40 seconds by using the inkjet printing method in the embodiment, and the efficiency of the inkjet printing process is greatly improved.
In one embodiment, the forming of the electromagnetic response ink includes: electromagnetic responsive particles are added to the ink in an atmosphere isolated from water, oxygen and light.
In order to minimize the influence on the basic characteristics of the ink during the addition of the electromagnetically responsive particles, it is necessary to exclude water, oxygen and light during the addition. Preferably, the ink to which the electromagnetic response particles are added may be stirred in a nitrogen atmosphere to ensure uniformity and stability of the added ink.
The ink in the embodiment has strict requirements on the environment in the process of adding the electromagnetic response particles, so that the property of the added ink is not changed, and the efficiency of the ink-jet printing process is improved under the condition of ensuring the requirements of the ink-jet printing process.
In an embodiment, the magnetic field lines of the electromagnetic field are all perpendicular to the substrate. The scheme does not need to consider the problem of the using amount of the ink, and all the magnetic field lines are perpendicular to the substrate, namely the directions of the magnetic field forces applied to almost all the electromagnetic response particles are perpendicular to the substrate, namely the directions of the magnetic field forces applied to the ink are perpendicular to the substrate, so that the leveling speed of each position on a film formed by the ink can be ensured to be maximized, the maximization of the whole leveling speed is achieved, and the time for shortening the ink jet process is maximized.
In one embodiment, as shown in fig. 2, the angle between the magnetic field lines of the electromagnetic field and the substrate increases gradually from the edge of the substrate to the center of the substrate, wherein the angle between the magnetic field lines near the edge of the substrate and the substrate ranges from no less than 45 degrees to less than 90 degrees, preferably from 60 degrees to 70 degrees.
Unlike the above embodiments, in this embodiment, all the magnetic field lines of the applied electromagnetic field are not perpendicular to the substrate, but only the magnetic field lines at the center of the substrate are perpendicular to the substrate, and the angle between the magnetic field lines extending outward from the center of the substrate and the substrate gradually decreases. In other words, the angle between the magnetic field lines and the substrate increases from the edge of the substrate to the center of the substrate until the center forms a 90 degree angle. As shown in fig. 2, 210 is a substrate, electromagnetic induction ink 220 is disposed on the substrate 210, 5 magnetic field lines are disposed from the edge of the substrate to the center of the substrate, and the 5 magnetic field lines and the substrate 210 form an included angle of, in order from the edge of the substrate to the center of the substrate, an angle 230, an angle 240, an angle 250, an angle 260, and an angle 270. The values of the 5 included angles in the figure are from small to large, namely that the angle 230 is smaller than the angle 240, smaller than the angle 250, smaller than the angle 260 and smaller than the angle 270, wherein the angle 270 is 90 degrees.
It should be understood that the number of the magnetic field lines from the edge of the substrate to the center of the substrate may be any, and the increment of the included angle may be set by a person skilled in the art according to the requirement.
In several experiments, the inventor finds that when the included angle between the magnetic field lines near the edge of the substrate and the substrate is 60 degrees to 70 degrees, the edge morphology of the electromagnetic response film can be controlled through the response between the magnetic field lines and the electromagnetic response particles in the ink. Specifically, because the magnetic field lines at the basic edge and the substrate form a certain angle, the attractive force applied to the ink at the edge is not perpendicular to the substrate but is converged towards the center of the substrate, so that the ink at the edge of the substrate is simultaneously subjected to the force moving towards the substrate and the center of the substrate, the waste caused by the fact that the ink directly overflows from the substrate can be prevented, and meanwhile, the edge appearance of the film can be controlled. In several experimental practices, the inventor finds that when the included angle between the magnetic field lines near the edge of the substrate and the substrate is 67 degrees, the optimal edge profile control effect can be achieved.
The electromagnetic field of applying in this embodiment, its magnetic field forms non-perpendicular contained angle with the base plate at the base plate edge to can make the ink at the edge receive the power to the base plate center, when reaching the effect to electromagnetic response film edge management and control, reduce the waste of ink.
In one embodiment, the electromagnetic field has an electric field strength in a range of 200V/cm to 500V/cm and a magnetic flux in a range of 200 Gauss to 500 Gauss.
In multiple tests of the inventor in the actual operation process, the inventor finds that when the electric field intensity range of an electromagnetic field is 200V/cm to 500V/cm, and the magnetic flux range is 200 gauss to 500 gauss, the best effect on the thickness, the leveling speed and the edge control of the electromagnetic response film can be achieved, so that the technical efficiency of ink-jet printing is improved, and the quality of the film prepared by ink-jet printing is ensured.
Fig. 3 is a schematic flow chart of a thin film encapsulation method according to an embodiment of the present invention, which includes:
310: the first inorganic layer is prepared using chemical vapor deposition.
Chemical Vapor Deposition (CVD) is a conventional method for preparing an inorganic layer, and a person skilled in the art can select an encapsulation material for the inorganic layer as required, which is not described herein.
320: an organic layer is prepared on the first inorganic layer.
In summary, in the inkjet printing process of the present embodiment, the movement of the ink is controlled by controlling the movement of the electromagnetic response particles, so as to increase the leveling speed of the organic thin film formed by the ink, thereby reducing the time required for the entire inkjet printing.
330: a second inorganic layer is prepared on the organic layer using chemical vapor deposition.
After the preparation of the organic film is finished, preparing a second inorganic layer on the organic layer formed by the organic film by using a chemical vapor deposition method, and finishing the film packaging of the display panel.
In the thin film encapsulation method adopted in this embodiment, when the middle organic layer is prepared, the ink with the electromagnetic response particles is jet-printed on the first organic layer by using an inkjet printing process, and then an electromagnetic field pointing to the first inorganic layer is applied, so that the time of the leveling process of the organic layer is shortened, thereby reducing the frequent time of the inkjet printing process, also meaning the frequent time of the whole thin film encapsulation process is reduced, and increasing the preparation efficiency of the whole display panel.
The organic thin film provided by an embodiment of the present invention can be prepared by the inkjet printing process, the ink used is the ink with the electromagnetic response particles as described above, and the composition and preparation of the ink with the electromagnetic response particles, how to increase the leveling speed of the electromagnetic response thin film by using the electromagnetic response ink and the electromagnetic field, and the like are described in detail in the foregoing, and are not described again here.
It can be appreciated that the organic thin film with electromagnetic response example in this embodiment is prepared by the ink and the method of the present invention, and the efficiency of the inkjet printing process can be improved by the combination of the special ink and the electromagnetic field, and the organic thin film prepared by the efficient inkjet printing process should also be within the protection scope of the present invention.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention are included in the present invention.
Claims (7)
1. A method of inkjet printing, comprising:
adding 2 to 20 electromagnetic responsive particles per cubic micron of ink to form an electromagnetic responsive ink;
performing inkjet printing by using the electromagnetic response ink to form an organic film for packaging;
and arranging an electromagnetic field pointing to a substrate on the organic thin film to increase the leveling speed of the organic thin film, wherein the included angle between the magnetic field lines of the electromagnetic field and the substrate gradually increases from the edge of the substrate to the center of the substrate, and the included angle between the magnetic field lines at the edge of the substrate and the substrate ranges from 45 degrees to 90 degrees so as to prevent the ink from overflowing the substrate.
2. The inkjet printing method of claim 1, wherein the forming the electromagnetically responsive ink comprises:
and adding the electromagnetic response particles into the ink under the atmosphere isolated from water, oxygen and light.
3. Inkjet printing method according to claim 1, wherein the magnetic field lines of the electromagnetic field are all perpendicular to the substrate.
4. A method of inkjet printing according to claim 1 wherein the magnetic field lines at the edges of the substrate are at an angle to the substrate in the range of 60 degrees to 70 degrees.
5. The inkjet printing method according to any one of claims 1 to 4, wherein the electromagnetic field has an electric field intensity ranging from 200V/cm to 500V/cm and a magnetic flux ranging from 200 Gauss to 500 Gauss.
6. A thin film encapsulation method, comprising:
preparing a first inorganic layer by chemical vapor deposition;
preparing an organic layer on the first inorganic layer;
preparing a second inorganic layer on the organic layer using chemical vapor deposition;
characterized in that the inkjet printing method according to any one of claims 1 to 5 is used for the preparation of an organic layer on the first inorganic layer.
7. An organic thin film for film encapsulation of a display panel, wherein the organic thin film is formed by the inkjet printing method according to any one of claims 1 to 5.
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| CN110549741B (en) * | 2019-09-11 | 2021-06-22 | 云谷（固安）科技有限公司 | Leveling device, inkjet printing apparatus and leveling method |
| CN112909202B (en) * | 2021-01-25 | 2022-12-09 | 绵阳京东方光电科技有限公司 | Display panel, preparation method thereof and display device |
| CN113682064A (en) * | 2021-08-05 | 2021-11-23 | 武汉华星光电半导体显示技术有限公司 | Display device packaging method |
| CN114864837A (en) * | 2022-05-07 | 2022-08-05 | 深圳市华星光电半导体显示技术有限公司 | Display panel, manufacturing method thereof and mobile terminal |
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| CN101104347A (en) * | 2006-07-10 | 2008-01-16 | 三有限公司 | Producing process and composition for printing body with stereoscopic vision |
| JP4996984B2 (en) * | 2007-06-01 | 2012-08-08 | トッパン・フォームズ株式会社 | Magnetic ink and manufacturing method thereof, and magnetic pattern and sheet having the same |
| CN104059426B (en) * | 2014-07-03 | 2016-12-07 | 北京科技大学 | A kind of method utilizing nano-magnetic powder to prepare magnetic fluid ink |
| CN108470755B (en) * | 2017-03-21 | 2020-07-24 | 京东方科技集团股份有限公司 | Thin film packaging structure, thin film packaging method and display device |
| CN107394062B (en) * | 2017-07-20 | 2019-02-05 | 京东方科技集团股份有限公司 | A kind of organic LED display panel and preparation method thereof, display device |
| CN108107625A (en) * | 2018-01-10 | 2018-06-01 | 深圳市华星光电技术有限公司 | The production method of color membrane substrates |
| CN109094231B (en) * | 2018-06-27 | 2021-11-19 | 中山市三盛化工科技有限公司 | Magnetic three-dimensional printing process |
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