阅读说明：本技术 显示面板的制备方法及其显示面板 (Preparation method of display panel and display panel ) 是由 李政阳 林书如 陈继峯 王亚玲 于 2020-11-30 设计创作，主要内容包括：本发明实施例涉及显示技术领域,公开了一种显示面板的制备方法及其显示面板。本发明中,所述显示面板的制备方法包括：提供基底；在所述基底上形成粘胶层,其中,所述粘胶层内具有按预定方向排列的特征颗粒,所述预定方向为所述基底、所述粘胶层的层叠方向；在所述粘胶层远离所述基底的一侧设置盖板。本发明提供的显示面板的制备方法及其显示面板能够提高显示面板的表面硬度。(The embodiment of the invention relates to the technical field of display, and discloses a preparation method of a display panel and the display panel. In the invention, the preparation method of the display panel comprises the following steps: providing a substrate; forming an adhesive layer on the substrate, wherein the adhesive layer is internally provided with characteristic particles arranged according to a preset direction, and the preset direction is the laminating direction of the substrate and the adhesive layer; and arranging a cover plate on one side of the adhesive layer far away from the substrate. The preparation method of the display panel and the display panel can improve the surface hardness of the display panel.)

1. A method for manufacturing a display panel, comprising:

providing a substrate;

forming an adhesive layer on the substrate, wherein the adhesive layer is internally provided with characteristic particles arranged according to a preset direction, and the preset direction is the laminating direction of the substrate and the adhesive layer;

and arranging a cover plate on one side of the adhesive layer far away from the substrate.

2. The method for manufacturing a display panel according to claim 1, wherein the forming of the adhesive layer on the substrate comprises:

adding characteristic particles into the initial viscose, wherein the characteristic particles are arranged in a preset direction under a preset condition;

and curing the initial adhesive liquid added with the characteristic particles under the preset condition to form the adhesive layer.

3. The method for manufacturing a display panel according to claim 2, wherein the characteristic particles are magnetic nanoparticles, and before adding the characteristic particles to the initial glue solution, the method further comprises:

mixing the solution with the nanocellulose and the solution with the metal ions to form a mixed solution;

adding an alkaline solution to the mixed solution to convert the metal ions into metal oxide particles, and forming the magnetic nanoparticles from the metal oxide particles and the nanocellulose.

4. The method according to claim 3, wherein a volume ratio of the solution containing nanocellulose to the solution containing metal ions is 1:1 to 2: 1.

5. The method for preparing a display panel according to claim 3, wherein the curing the initial adhesive solution with the added feature particles under the preset conditions comprises:

putting the initial viscose liquid added with the magnetic nanoparticles into a magnetic field, wherein the direction of the magnetic field is the in-plane normal direction of the display panel;

and curing the initial adhesive liquid put into the magnetic field to form the adhesive layer.

6. The method for preparing a display panel according to claim 2, wherein the feature particles are optically active nanoparticles, and the step of curing the initial viscose solution after adding the feature particles under a preset condition comprises:

irradiating the initial viscose liquid added with the optically active nano-particles by using polarized light, wherein the polarization direction of the polarized light is the in-plane normal direction of the display panel;

curing the initial adhesive liquid irradiated by the polarized light to form the adhesive layer.

7. The method of claim 6, wherein the optically active nanoparticles comprise: nanofiber with azo and cinnamoyl groups.

8. The method of claim 6, wherein the weight fraction of optically active nanoparticles in the initial viscose is between 1% and 5% after the optically active nanoparticles are added to the initial viscose.

9. The method of any one of claims 2 to 8, wherein the initial adhesive solution is an acrylic polymer emulsion.

10. A display panel, comprising: the base, the viscose layer and the apron that stack gradually set up, wherein, have the characteristic granule of arranging according to the predetermined direction in the viscose layer, the predetermined direction is the base the viscose layer with the range upon range of direction of apron.

Technical Field

The embodiment of the invention relates to the technical field of display, in particular to a preparation method of a display panel and the display panel.

Background

Flat Display panels, such as conventional Liquid Crystal Display (LCD) panels, Organic Light Emitting Diode (OLED) panels, and Display panels using Light Emitting Diode (LED) devices, have the advantages of high image quality, power saving, thin body, and wide application range, and are widely used in various consumer electronics products, such as mobile phones, televisions, personal digital assistants, digital cameras, notebook computers, desktop computers, and the like, and become the mainstream of Display panels.

In the prior art, the display panel comprises an adhesive layer, and the adhesive layer prepared by the existing process has no support, so that the surface hardness of the display panel is low. Therefore, it is necessary to provide a new method for manufacturing a display panel to solve the above problems.

Disclosure of Invention

An object of the embodiments of the present invention is to provide a method for manufacturing a display panel and a display panel thereof, which can improve the surface hardness of the display panel.

In order to solve the above technical problem, an embodiment of the present invention provides a method for manufacturing a display panel, including:

providing a substrate; forming an adhesive layer on the substrate, wherein the adhesive layer is internally provided with characteristic particles arranged according to a preset direction, and the preset direction is the laminating direction of the substrate and the adhesive layer; and arranging a cover plate on one side of the adhesive layer far away from the substrate.

Additionally, the forming an adhesive layer on the substrate includes: adding characteristic particles into the initial viscose, wherein the characteristic particles are arranged in a preset direction under a preset condition; and curing the initial adhesive liquid added with the characteristic particles under the preset condition to form the adhesive layer.

In addition, the characteristic particles are magnetic nanoparticles, and before the characteristic particles are added into the initial viscose, the method further comprises the following steps: mixing the solution with the nanocellulose and the solution with the metal ions to form a mixed solution; adding an alkaline solution to the mixed solution to convert the metal ions into metal oxide particles, and forming the magnetic nanoparticles from the metal oxide particles and the nanocellulose.

In addition, the volume ratio of the solution with nanocellulose and the solution with metal ions is between 1:1 and 2: 1.

In addition, the step of curing the initial viscose liquid added with the characteristic particles under the preset condition comprises the following steps: putting the initial viscose liquid added with the characteristic particles into a magnetic field, wherein the direction of the magnetic field is the in-plane normal direction of the display panel; and curing the initial adhesive liquid put into the magnetic field to form the adhesive layer.

In addition, the characteristic particles are optically active nanoparticles, and the step of curing the initial viscose liquid added with the characteristic particles under a preset condition comprises the following steps: irradiating the initial viscose liquid added with the optically active nano-particles by using polarized light, wherein the polarization direction of the polarized light is the in-plane normal direction of the display panel; curing the initial adhesive liquid irradiated by the polarized light to form the adhesive layer.

In addition, the optically active nanoparticle includes: nanofiber with azo and cinnamoyl groups.

In addition, after the optically active nanoparticles are added into the initial viscose, the weight fraction of the optically active nanoparticles in the initial viscose is between 1% and 5%.

In addition, the initial viscose is acrylic polymer emulsion.

An embodiment of the present invention also provides a display panel, including: the base, the viscose layer and the apron that stack gradually set up, wherein, have the characteristic granule of arranging according to the predetermined direction in the viscose layer, the predetermined direction is the base the viscose layer with the range upon range of direction of apron.

Compared with the prior art, the embodiment of the invention at least has the following advantages:

through set up the characteristic granule in the viscose layer, because the characteristic granule is arranged according to the predetermined direction, and the predetermined direction is the range upon range of direction of basement, viscose layer and apron for the viscose layer no longer is simple flexible material, has improved the support performance on viscose layer, thereby has improved display panel's surface hardness, has also improved the display panel who has this kind of viscose layer and has resisted the deformability in the predetermined direction, and then can avoid the rete to receive to strike sunken too big and cause the rete damage. In addition, the bending direction of the display panel is parallel to the laminating direction of the substrate, the adhesive layer and the cover plate, so that the characteristic particles arranged in the preset direction cannot influence the bending performance of the display panel, and the reliability of the display panel with the adhesive layer is improved.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

Fig. 1 is a flowchart of a manufacturing method of a display panel according to a first embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a display panel according to a first embodiment of the present invention;

FIG. 3 is a schematic structural diagram of another display panel according to the first embodiment of the present invention;

fig. 4 is a schematic flow chart of a manufacturing method of a display panel according to a second embodiment of the present invention;

fig. 5 is a schematic flow chart of a manufacturing method of a display panel according to a third embodiment of the present invention;

fig. 6 is a schematic structural diagram of a display panel according to a fourth embodiment of the present invention.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in various embodiments of the invention, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.

A first embodiment of the present invention relates to a method of manufacturing a display panel, as shown in fig. 1, including the steps of:

s101: a substrate is provided.

Specifically, the substrate in this embodiment may be a cover plate in a display panel with a double-cover-plate structure, or may be a polarizer in a display panel with a single-cover-plate structure, and for convenience of understanding, the following specifically describes the kind of the substrate in this embodiment with reference to fig. 2 and fig. 3:

referring to fig. 2, the display panel 100 includes a polarizer 1, a first adhesive layer 2, a first cover plate 3, a second adhesive layer 4, and a second cover plate 5 stacked in sequence, the substrate in this embodiment is the first cover plate 3, that is, the adhesive layer formed in the subsequent step is the second adhesive layer 4, because the in-plane normal modulus of the adhesive layer of this embodiment is significantly improved compared to the existing adhesive layer, the normal deformation resistance of the second adhesive layer 4 is enhanced, thereby preventing the adjacent film materials from being damaged due to too large recess after being subjected to a large impact, and further improving the surface hardness of the display panel 100.

Referring to fig. 3, the display panel 200 includes a polarizer 10, an adhesive layer 20, and a cover plate 30 stacked in sequence, wherein the substrate in this embodiment is the polarizer 10. Because the display panel 200 is only provided with a single-layer cover plate, on one hand, the display panel 200 is relatively thin, the bending performance of the display panel 200 is improved, the tensile strain of the cover plate 30 is reduced, and the risk of cracks generated by a hardened coating is effectively reduced; on the other hand, the display panel 200 with a single cover plate has a low production cost, and can effectively improve the product competitiveness.

S102: and forming an adhesive layer on the substrate, wherein the adhesive layer is internally provided with characteristic particles arranged according to a preset direction.

Specifically, the predetermined direction is a lamination direction of the substrate and the adhesive layer. The adhesive layer of this embodiment is formed by: adding characteristic particles into the initial viscose, wherein the characteristic particles are arranged in a preset direction under a preset condition; and curing the initial adhesive liquid added with the characteristic particles under the preset condition to form the adhesive layer.

It can be understood that the initial adhesive liquid in this embodiment may be a PMMA (polymethyl methacrylate) polymer emulsion, the PMMA polymer emulsion is cured to form an OCA optical cement, the OCA optical cement has strong viscosity, and the color is transparent, so that while the adhesion between the cover plate and the polarizer is enhanced, the luminescent performance of the display device layer located below the adhesive layer is not affected by the color of the adhesive layer film layer, and the display effect of the display panel is improved. It is understood that the material of the priming adhesive is not limited specifically, and other priming adhesives capable of adhering the cover plate and the polarizer are within the scope of the present embodiment.

It should be noted that the characteristic particles in this embodiment may be magnetic nanoparticles or optically active nanoparticles, and the formation manner of the adhesive layer with different types of characteristic particles will be described in detail in the following embodiments, and will not be described herein again to avoid repetition.

S103: and arranging a cover plate on one side of the adhesive layer far away from the substrate.

Specifically, the cover plate of the embodiment is made of plastic and the like, preferably, the cover plate is made of CPI, and the defect that the traditional PI film is light yellow or dark yellow is overcome because the CPI is made of a transparent material. The material of the cover plate may be PI (polyimide), PEN (polyethylene naphthalate), PET (polyethylene terephthalate), COP (cyclic polyolefin), or TAC (triacetyl cellulose film), and the material of the cover plate is not particularly limited in this embodiment.

Compared with the prior art, the characteristic particles are arranged in the adhesive layer, and the characteristic particles are arranged in the preset direction, and the preset direction is the stacking direction of the substrate, the adhesive layer and the cover plate, so that the adhesive layer is not a pure flexible material any more, the supporting performance of the adhesive layer is improved, the surface hardness of the display panel is improved, the deformation resistance of the display panel with the adhesive layer in the preset direction is also improved, and the damage of the adhesive layer caused by too large impact depression of the film layer can be avoided. In addition, the bending direction of the display panel is parallel to the laminating direction of the substrate, the adhesive layer and the cover plate, so that the characteristic particles arranged in the preset direction cannot influence the bending performance of the display panel, and the reliability of the display panel with the adhesive layer is improved.

A second embodiment of the present invention relates to a method for manufacturing a display panel, and this embodiment is a specific description of the first embodiment, and further describes: one specific form of the adhesive layer. The specific flow of this embodiment is shown in fig. 4, and includes the following steps:

s201: a substrate is provided.

S202: the solution with nanocellulose is mixed with the solution with metal ions to form a mixed solution.

Specifically, Nanocellulose (NFC) has the property of high modulus and high fine structure, and nanocellulose can improve the hardness of a polymer after forming the polymer with other substances.

The metal ions in the present embodiment are preferably iron ions, and may be other metal ions such as copper ions, and the kind of the metal ions is not particularly limited in the present embodiment.

It is worth mentioning that the volume ratio of the solution with nanocellulose and the solution with metal ions is between 1:1 and 2: 1. Further, the nanocellulose solution has a solids content of 10% to 30%, and the concentration of the metal ion solution is 0.2 to 0.5 mol/l. By the method, the quantity of the magnetic nanoparticles formed by mixing the nano cellulose solution and the metal ion solution can be ensured to meet the hardness requirement of the adhesive layer, so that the reliability of the preparation method of the display panel is improved.

Preferably, the nanocellulose solution has a solids content of 20% and the concentration of the metal ion solution is 0.35 mol/l. The nano-cellulose solution with the solid content and the metal ion solution with the concentration can reduce the preparation cost of the display panel while ensuring that the quantity of the magnetic nano-particles meets the hardness requirement of the adhesive layer.

S203: an alkaline solution is added to the mixed solution to convert the metal ions into metal oxide particles, and magnetic nanoparticles are formed by the metal oxide particles and the nanocellulose.

Specifically, the alkaline solution may be a sodium hydroxide solution, and the volume ratio of the sodium hydroxide solution to the solution having the metal ions is in the range of 1: 8 to 1: 10, respectively. By setting such a ratio, it is possible to ensure that all the metal ions in the solution having the metal ions are converted into the metal oxide particles. It is to be understood that the kind of the alkaline solution is not specifically limited in this embodiment, and the alkaline solution may be other than the sodium hydroxide solution.

Preferably, the volume ratio of the sodium hydroxide solution to the solution with metal ions is 1: 9. The sodium hydroxide solution and the metal ion solution in the proportion can ensure that metal ions are completely converted into metal oxide particles, and simultaneously, the preparation cost of the display panel is reduced.

S204: and putting the initial viscose liquid added with the magnetic nano particles into a magnetic field, and solidifying the initial viscose liquid put into the magnetic field to form a viscose layer.

Specifically, the direction of the magnetic field is the in-plane normal direction of the display panel, that is, the lamination direction of the substrate and the adhesive layer, and under the control of an external magnetic field, the magnetic nanoparticles all exhibit a fixed orientation (predetermined direction), and finally the anisotropic OCA adhesive is obtained by curing.

S205: and arranging a cover plate on one side of the adhesive layer far away from the substrate.

Steps S201 and S205 of this embodiment are similar to steps S101 and S103 of the first embodiment, and are not described again here to avoid repetition.

Compared with the prior art, the characteristic particles are arranged in the adhesive layer, and the characteristic particles are arranged in the preset direction, and the preset direction is the laminating direction of the substrate, the adhesive layer and the cover plate, so that the hardness of the adhesive layer in the preset direction is enhanced, the deformation resistance of the display panel with the adhesive layer in the preset direction is improved, and the damage of the adhesive layer caused by too large impact depression of the adhesive layer can be avoided. In addition, the bending direction of the display panel is parallel to the laminating direction of the substrate, the adhesive layer and the cover plate, so that the characteristic particles arranged in the preset direction cannot influence the bending performance of the display panel, and the reliability of the display panel with the adhesive layer is improved.

A third embodiment of the present invention relates to a method for manufacturing a display panel, and this embodiment is a specific description of the first embodiment, and further describes: another specific form of the adhesive layer. The specific flow of this embodiment is shown in fig. 5, and includes the following steps:

s301: a substrate is provided.

S302: adding optically active nanoparticles into the initial viscose.

Specifically, the optically active nanoparticles in this embodiment include: nanofiber with azo and cinnamoyl groups.

It is worth mentioning that after the optically active nanoparticles are added into the initial viscose, the weight fraction of the optically active nanoparticles in the initial viscose is between 1% and 5%. By the method, the optical activity nano particles can meet the hardness requirement of the subsequently prepared adhesive layer.

Preferably, the weight fraction of the optically active nanoparticles in the initial viscose is 3%. The weight fraction reduces the preparation cost of the display panel.

S303: irradiating the initial dope to which the optically active nanoparticles are added with polarized light, and curing the initial dope irradiated with the polarized light to form a dope layer.

Specifically, in the present embodiment, the wavelength of the polarized light is 400 to 500 nm, and the illumination intensity of the polarized light is 100 to 500 mw/cm. The polarized light with the wavelength and the illumination intensity can ensure that the optically active nano particles have fixed orientation.

S304: and arranging a cover plate on one side of the adhesive layer far away from the substrate.

Steps S301 and S304 of this embodiment are similar to steps S101 and S103 of the first embodiment, and are not described again here to avoid repetition.

Compared with the prior art, the characteristic particles are arranged in the adhesive layer, and the characteristic particles are arranged in the preset direction, and the preset direction is the laminating direction of the substrate, the adhesive layer and the cover plate, so that the hardness of the adhesive layer in the preset direction is enhanced, the deformation resistance of the display panel with the adhesive layer in the preset direction is improved, and the damage of the adhesive layer caused by too large impact depression of the adhesive layer can be avoided. In addition, the bending direction of the display panel is parallel to the laminating direction of the substrate, the adhesive layer and the cover plate, so that the characteristic particles arranged in the preset direction cannot influence the bending performance of the display panel, and the reliability of the display panel with the adhesive layer is improved.

The steps of the above methods are divided for clarity, and the implementation may be combined into one step or split some steps, and the steps are divided into multiple steps, so long as the same logical relationship is included, which are all within the protection scope of the present patent; it is within the scope of the patent to add insignificant modifications to the algorithms or processes or to introduce insignificant design changes to the core design without changing the algorithms or processes.

A fourth embodiment of the present invention relates to a display panel, which has a specific structure as shown in fig. 6, and includes: the substrate 61, the adhesive layer 62 and the cover plate 63 are sequentially stacked, wherein the adhesive layer 62 has characteristic particles 620 arranged in a predetermined direction X, and the predetermined direction X is the stacking direction of the substrate 61, the adhesive layer 62 and the cover plate 63.

It should be understood that the present embodiment is a structural embodiment related to the first, second, and third embodiments, and may be implemented in cooperation with the first, second, and third embodiments. The related technical details mentioned in the first, second and third embodiments are still valid in this embodiment, and are not described herein again in order to reduce repetition. It is to be understood that the related-art details mentioned in the present embodiment can also be applied to the first embodiment, the second embodiment, and the third embodiment.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific embodiments for practicing the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.