CN210401724U

CN210401724U - Polaroid and display panel

Info

Publication number: CN210401724U
Application number: CN201920794462.3U
Authority: CN
Inventors: 梁珂; 应如波; 魏晓婷
Original assignee: Kunshan New Flat Panel Display Technology Center Co Ltd; Kunshan Govisionox Optoelectronics Co Ltd
Current assignee: Kunshan New Flat Panel Display Technology Center Co Ltd; Kunshan Govisionox Optoelectronics Co Ltd
Priority date: 2019-05-29
Filing date: 2019-05-29
Publication date: 2020-04-24
Anticipated expiration: 2029-05-29

Abstract

The application discloses polaroid and display panel, the polaroid includes: the light-blocking film comprises a polarized light structure, a first bonding layer and a second bonding layer, wherein the polarized light structure and the first bonding layer are stacked, the second bonding layer is arranged on the side face of the polarized light structure in a surrounding mode, and the first bonding layer and the second bonding layer respectively comprise optical cement and water-blocking particles dispersed in the optical cement. Through the mode, thickness and rigidity of polaroid can be reduced to this application, can also reduce outside moisture and air to the erosion of polarisation structure, and then reach extension polaroid life's purpose.

Description

Polaroid and display panel

Technical Field

The application relates to the technical field of display, in particular to a polarizer and a display panel.

Background

At present, the OLED display panel generally includes a metal layer, such as an anode in a top-emitting OLED display panel, a cathode in a bottom-emitting OLED display panel, and the like. In order to reduce the reflection of the surface of the metal layer to the external ambient light, a polarizer may be disposed on one side of the light emitting surface of the OLED display panel.

The inventor of the application finds that the conventional polaroid has high elastic modulus and high brittleness and is not beneficial to bending in a long-term research process.

SUMMERY OF THE UTILITY MODEL

The technical problem that this application mainly solved provides a polaroid and display panel, can reduce the thickness and the rigidity of polaroid.

In order to solve the technical problem, the application adopts a technical scheme that: provided is a polarizer including:

the light-polarizing structure comprises a light-polarizing structure, a first bonding layer and a second bonding layer, wherein the light-polarizing structure and the first bonding layer are stacked, and the second bonding layer surrounds the side face of the light-polarizing structure; wherein the first adhesive layer and the second adhesive layer respectively comprise optical glue and water-blocking particles dispersed in the optical glue.

The polarizing structure comprises a linear polarizing film and a phase difference layer which are arranged in a stacked mode.

The polarizing structure further comprises a third bonding layer, the third bonding layer is located between the linear polarizing film and the phase difference layer, the third bonding layer is in contact with the second bonding layer, and the third bonding layer comprises optical glue and water blocking particles dispersed in the optical glue.

The phase difference layer comprises 1/4 phase difference films and 1/2 phase difference films which are stacked, the 1/2 phase difference film is close to the linear polarization film relative to the 1/4 phase difference film, and a tamper-resistant layer is arranged between the 1/4 phase difference film and the 1/2 phase difference film.

The anti-interference layer comprises optical cement and water blocking particles dispersed in the optical cement.

The anti-interference layer is an amorphous silicon layer.

Wherein the water-blocking particles comprise at least one of cellulose triacetate and cyclic olefin polymer.

The polarizer further comprises a fourth bonding layer arranged on one side, far away from the linear polarizing film, of the phase difference layer, wherein the fourth bonding layer is in contact with the second bonding layer and comprises optical cement and water blocking particles dispersed in the optical cement.

In order to solve the above technical problem, a display panel is further provided, wherein the display panel includes any one of the above polarizers.

The light-emitting diode further comprises an encapsulation layer and an amorphous silicon layer located between the encapsulation layer and the polarization structure.

The beneficial effect of this application is: be different from prior art's condition, the polaroid that this application provided includes the polarizing structure, the first tie coat that range upon range of setting to and enclose the second tie coat of establishing in polarizing structure side, and first tie coat and second tie coat include the optical cement and the granule that blocks water of dispersion at the optical cement kind. The design mode of above-mentioned first tie coat and second tie coat not only can be with the position fixation of each functional layer in the polarisation structure, can also reduce the erosion of outside moisture and air to the polarisation structure, and then reach extension polaroid life's purpose. In addition, the design mode is equivalent to combining a protective layer and an adhesive layer in the traditional polaroid into a whole, so that the aim of further reducing the thickness of the polaroid is fulfilled; and because the first bonding layer and the second bonding layer are soft, the rigidity of the polaroid can be reduced by the first bonding layer and the second bonding layer, so that the bending is facilitated, the display effect of the flexible display panel is improved, and the service life of the flexible display panel is prolonged.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:

FIG. 1 is a schematic structural diagram of an embodiment of a polarizer of the present application;

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

fig. 3 is a schematic structural diagram of another embodiment of a display panel according to the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all 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 application.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a polarizer of the present application, the polarizer including: a polarizing structure 10 and a first adhesive layer 12 which are stacked, and a second adhesive layer 14 which surrounds the side of the polarizing structure 10; wherein first adhesive layer 12 and second adhesive layer 14 comprise an optical glue and water-blocking particles dispersed in the optical glue, respectively.

Specifically, in the present embodiment, the optical adhesive has the advantages of being colorless and transparent, having high light transmittance, good adhesion, and small shrinkage after curing; the optical cement can be natural resin optical cement or synthetic resin optical cement. The water-blocking particles include at least one of cellulose triacetate and cyclic olefin polymer. The water-blocking particles may be set in particle size as desired, and may be regular in shape (e.g., spherical, ellipsoidal, cubic, etc.) or irregular in shape. The first adhesive layer 12 and the second adhesive layer 14 are designed to fix the positions of the functional layers in the polarizing structure 10, and reduce the erosion of external moisture and air to the polarizing structure 10, thereby prolonging the service life of the polarizer. In addition, the design mode is equivalent to combining a protective layer and an adhesive layer in the traditional polaroid into a whole, so that the aim of further reducing the thickness of the polaroid is fulfilled; and because the first bonding layer 12 and the second bonding layer 14 are soft, the first bonding layer 12 and the second bonding layer 14 can reduce the rigidity of the polarizer, so that the flexible display panel is beneficial to bending, improving the display effect of the flexible display panel and prolonging the service life of the flexible display panel. Of course, in other embodiments, the filling amount of the water-blocking particles can be reduced by modifying the optical cement molecule to have water-blocking property.

In one embodiment, the polarizing structure 10 includes a linear polarizing film 100 and a phase difference layer 102 that are stacked. The linear polarizing film 100 is a major component of the polarizer, and determines the polarization performance and transmittance of the polarizer, while also affecting the color tone and optical durability of the polarizer. The linear polarizing film 100 may be made of polyvinyl alcohol, and the linear polarizing film 100 may be formed by dyeing and stretching a polyvinyl alcohol film, for example. When the polarizer is applied to the display panel, light rays can be refracted for many times after passing through each functional layer of the display panel, so that light interference is caused, and the display effect is further influenced. Therefore, it is generally necessary to introduce the retardation layer 102 to optically compensate for this, so as to reduce the influence of light interference on the display color.

In another embodiment, with continued reference to fig. 1, the polarizing structure 10 may further include a third adhesive layer 104 between the phase difference layer 102 and the linear polarizing film 100. The third adhesive layer 104 is in contact with the second adhesive layer 14, and the third adhesive layer 104 also includes an optical glue and water-blocking particles dispersed in the optical glue. The third adhesive layer 104 is designed to make the phase difference layer 102 and the linear polarizing film 100 more closely connected by using the adhesiveness of the optical adhesive, and the third adhesive layer 104 contacts with the second adhesive layer 14 to form a sealed space around the linear polarizing film 100, so that the corrosion of external moisture and air to the linear polarizing film 100 can be better reduced by using the water-blocking property of the water-blocking particles.

Further, in the present embodiment, the content of the water blocking particles in the first adhesive layer 12 and the third adhesive layer 104 on both sides of the linearly polarizing film 100 is greater than the content of the water blocking particles in the second adhesive layer 14. The content of the water-blocking particles referred to herein may be an average mass content or an average volume content. Generally, the higher the content of water-blocking particles, the better the water-blocking performance, but the corresponding optical cement has a reduced viscosity. The design mode can well balance the water resistance and the viscosity, reduce the using amount of water-resistant particles and reduce the cost. In addition, in the present embodiment, in order to enhance the water-blocking and oxygen-blocking protection of the polarizing film 100, the content of the water-blocking particles in each position in the second adhesive layer 14 may be different; for example, the content of the water blocking particles is greater in the region where the second adhesive layer 14 contacts the linearly polarizing film 100 than in other regions.

In an application scenario, referring to fig. 1 again, the retardation layer 102 includes 1/4

retardation films

1020 and 1/2 retardation film 1022 disposed in a stacked manner; wherein, the 1/2 phase difference film 1022 is close to the linear polarization film 100 relative to the 1/4 phase difference film 1020, and a tamper-resistant layer 1024 is arranged between the 1/4 phase difference films 1020 and the 1/2 phase difference film 1022; the anti-interference layer 1024 can reduce the polar interference between the

phase difference films

1022 and 1020 1/2 and 1/4, respectively. The mode of combining the 1/2 phase difference film 1022 and the 1/4 phase difference film 1020 can ensure that the black-integration effect of a subsequently formed display panel is better; that is, the edge of the cover plate of the display panel formed subsequently is black, and the display area is also black when not lit, and the phase difference layer 102 is designed in such a way that the black transition between the edge of the cover plate and the display area is not obvious. Of course, in other embodiments, the retardation layer 102 may also include only 1/4 retardation films 1020, only 1/2 retardation films 1022, or multiple 1/4 retardation films 1020 and multiple 1/2 retardation films 1022, so as to satisfy the requirement that the natural light reflection light path is perpendicular to the incident light path, and the reflected light is blocked by the linear polarization film 100 and cannot exit.

In addition, in the above embodiments, the anti-tamper layer 1024 may also include an optical glue and water-blocking particles dispersed in the optical glue to further reduce the erosion of external moisture. In one application scenario, the content of water-blocking particles in the first adhesive layer 12 is greater than the content of water-blocking particles in the tamper-resistant layer 1024. Generally, the higher the content of water-blocking particles, the better the water-blocking performance, but the corresponding optical cement has a reduced viscosity. The design mode can well balance the water resistance and the viscosity, reduce the using amount of water-resistant particles and reduce the cost.

Of course, in other embodiments, the anti-interference layer 1024 may also be an amorphous silicon layer; the amorphous silicon layer has good bonding effect, higher light transmittance and anti-interference effect, and can fully absorb permeated water and oxygen. In addition, as shown in fig. 1, the polarizer provided in the present application may further include a fourth adhesive layer 16 disposed on a side of the phase difference layer 102 away from the linear polarizer 100; fourth adhesive layer 16 is in contact with second adhesive layer 14, and fourth adhesive layer 16 includes an optical glue and water-blocking particles dispersed in the optical glue. In the present embodiment, the content of water-blocking particles in the fourth adhesive layer 16 may be low. A release film may be subsequently disposed on one side of the fourth adhesive layer 16 and the first adhesive layer 12, so that the polarizer may be independently circulated. When the display panel is assembled, the release films on the two sides of the polarizer can be removed, one side of the fourth bonding layer 16 of the polarizer is attached to the packaging layer, and one side of the first bonding layer 12 of the polarizer is attached to the cover plate.

In addition, in the above embodiment, the fourth adhesive layer 16, and/or the phase difference layer 102, and/or the linearly polarizing film 100, and/or the first adhesive layer 12, and/or the second adhesive layer 14 are formed by coating. The coating mode is not only high in efficiency, but also controllable in precision, so that the layers can be combined more tightly, the sealing performance is better, and the coating is not easy to invade by water vapor.

Referring to fig. 2, fig. 2 is a schematic structural diagram of an embodiment of a display panel of the present application, where the display panel may be an OLED display panel, a Micro-OLED display panel, and the like, and the display panel specifically includes the polarizer 1 in any of the above embodiments.

Referring to fig. 2, the display panel further includes an encapsulation layer 20, and the detailed structure of the polarizer 1 is not described herein again; the sealing layer 20 and the polarizer 1 are stacked, and the sealing layer 20, the phase difference layer 102, and the linear polarizing film 100 are sequentially stacked.

In addition, in this embodiment, the display panel may further include other structures, for example, a cover plate 22 connected to the first adhesive layer 12 on the side away from the polarizing structure 10; the flexible substrate is positioned on one side, far away from the polarizing structure 10, of the packaging layer 20; and the luminescent layer is positioned between the flexible substrate and the packaging layer 20, the packaging layer 20 can be an organic-inorganic thin film packaging layer or the like, and one side of the packaging layer 20 close to the polarizer is an inorganic packaging layer which can be made of silicon nitride.

In one embodiment, with reference to fig. 2, when the polarizer 1 of the display panel provided by the present application includes the fourth adhesive layer 16, the encapsulation layer 20 may be fixedly connected to the polarizer 1 through the fourth adhesive layer 16.

In another embodiment, please refer to fig. 3, fig. 3 is a schematic structural diagram of a display panel of the present application in another embodiment, which is different from the display panel in fig. 2 in that the fourth adhesive layer 16 in fig. 2 is replaced by an amorphous silicon layer 30, specifically, the amorphous silicon layer 30 in this embodiment is located between the encapsulation layer 20 and the polarization structure 10; wherein the amorphous silicon layer 30 is formed on the encapsulation layer 20 by a chemical vapor deposition method. On one hand, since the encapsulation layer 20 generally comprises a silicon nitride inorganic layer, the amorphous silicon layer 30 is tightly combined with the silicon nitride in the encapsulation layer 20 when formed on the encapsulation layer 20 by the chemical vapor deposition method; in addition, since a large number of hydrogen bonds exist in the amorphous silicon layer 30, which may be connected with the polarizing structure 10 through the hydrogen bonds, the amorphous silicon layer 30 may enhance adhesion between the encapsulation layer 20 and the polarizing structure 10. On the other hand, the amorphous silicon layer 30 has good flexibility, and can increase the bending resistance of the display panel. On the other hand, the amorphous silicon layer 30 has a low density, and a large number of dangling bonds and voids are formed in amorphous silicon molecules, so that permeated water and oxygen can be fully absorbed, and the probability of packaging failure of the packaging layer 20 is further reduced. In yet another aspect, the amorphous silicon layer 30 has better optical properties, for example, a higher light absorption coefficient and a higher refractive index, and thus may reduce the reflectivity of the display panel. Meanwhile, the amorphous silicon layer 30 is formed by a chemical vapor deposition method, and the preparation process is mature, simple to operate and easy to implement.

Of course, in other embodiments, the amorphous silicon layer 30 may also be directly located between the fourth bonding layer 16 and the encapsulation layer 20 in fig. 2. The display panel provided by the present application will be further described in terms of the process flow.

Taking the display panel in fig. 2 as an example, the preparation process may include:

A. and a continuous fourth bonding layer 16 is coated and formed on one side surface of the first release film.

B. And performing positioning coating according to requirements, and coating and forming a plurality of 1/4 phase difference films 1020 arranged at intervals on the fourth bonding layer 16.

C. A tamper-resistant layer 1024 is formed on the surface of the fourth adhesive layer 16, and the tamper-resistant layer 1024 covers the plurality of 1/4 retardation films 1020 and the spacing regions between the adjacent 1/4 retardation films 1020; at this time, the anti-interference layer 1024 may be made of optical cement doped with water blocking particles; when the anti-interference layer 1024 is made of an amorphous silicon layer, it can be formed by a chemical vapor deposition method.

D. A plurality of 1/2 retardation films 1022 are coated and formed on the surface of the interference-resistant layer 1024 at positions corresponding to the plurality of 1/4 retardation films 1020.

E. A third adhesive layer 104 is formed on the surface of the interference-resistant layer 1024 by coating, and the third adhesive layer 104 covers the plurality of 1/2 retardation films 1022 and the spaced regions between the adjacent 1/2 retardation films 1022.

F. A plurality of linear polarizing films 100 are applied and formed on the surface of the third adhesive layer 104 at positions corresponding to the 1/2 retardation film 1022.

G. The first adhesive layer 12 is formed on the surface of the third adhesive layer 104, and the first adhesive layer 12 covers the linear polarizing films 100 and the spacing regions between the adjacent first adhesive layers 12.

H. A second release film is provided on one side of the first adhesive layer 12.

I. Cutting the area between the adjacent linear polarizing films 100 to obtain a single polarizer; at this time, the adhesive layers remaining at the sides of the polarizing structure 10 form the second adhesive layer 14. Of course, in other embodiments, the cutting may be performed first, and then the second release film is disposed;

J. providing the flexible substrate, the light emitting layer and the encapsulation layer 20 which are already stacked, removing the first release film, attaching the fourth adhesive layer 16 to the encapsulation layer 20, removing the second release film, and attaching the cover plate 22 to the first adhesive layer 12.

Of course, in other embodiments, the display panel in fig. 2 may be formed in other manners.

For example:

A. and coating and forming a continuous fourth bonding layer 16 on the surface of the first release film.

B. And performing positioning coating according to requirements, and coating and forming a plurality of 1/4 phase difference films 1020 arranged at intervals on the surface of the fourth bonding layer 16.

C. A surface of the retardation film 1020 corresponding to 1/4 is coated or chemical vapor deposited to form a tamper resistant layer 1024.

D. 1/2 phase difference films 1022 are coated and formed on the surfaces of the corresponding anti-interference layers 1024; the third adhesive layer 104 is formed on the surface of the retardation film 1022 corresponding to 1/2.

E. The linear polarizing film 100 is coated and formed on the surface corresponding to the third adhesive layer 104.

F. The first adhesive layer 12 is formed on the surface of the corresponding linear polarizing film 100.

G. And filling and forming a second bonding layer 14 in the formed interval area between the adjacent polarizers.

H. Cutting the second adhesive layer 14 between adjacent polarizers to obtain a single polarizer;

I. providing the flexible substrate, the light emitting layer and the encapsulation layer 20 which are already stacked, removing the first release film, attaching the fourth adhesive layer 16 to the encapsulation layer 20, removing the second release film, and attaching the cover plate 22 to the first adhesive layer 12.

Another example is:

B. According to the patterned positioning, a plurality of 1/4 phase difference films 1020 arranged at intervals are coated and formed on the surface of the fourth adhesive layer 16.

C. A first sub-adhesive layer is filled between adjacent 1/4 retardation films 1020, and the first sub-adhesive layer is flush with 1/4 retardation film 1020.

D. A surface of the retardation film 1020 corresponding to 1/4 is coated or chemical vapor deposited to form a tamper resistant layer 1024.

E. A second sub-adhesive layer is filled between adjacent tamper resistant layers 1024 and is flush with the tamper resistant layers 1024.

F. A 1/2 phase difference film 1022 is formed on the surface corresponding to the interference-free layer 1024.

G. A third sub-adhesive layer is filled between the adjacent 1/2 retardation films 1022, and the third sub-adhesive layer is flush with the 1/2 retardation film 1022.

H. The third adhesive layer 104 is formed on the surface of the retardation film 1022 corresponding to 1/2.

I. A fourth sub-adhesive layer is filled between the adjacent third adhesive layers 104, and the fourth sub-adhesive layer is flush with the third adhesive layers 104.

J. The linear polarizing film 100 is coated and formed on the surface corresponding to the third adhesive layer 104.

K. A fifth sub-adhesive layer is filled between the adjacent linear polarizing films 100, and the fifth sub-adhesive layer is flush with the linear polarizing films 100.

L, coating the surface of the corresponding linear polarizing film 100 to form a first adhesive layer 12.

M, filling a sixth sub-adhesive layer between adjacent first adhesive layers 12, and the sixth sub-adhesive layer is flush with the first adhesive layer 12.

N, forming a second adhesive layer 14 by filling the first sub-adhesive layer to the sixth sub-adhesive layer in the interval region between the adjacent polarizers; the second adhesive layer 14 between adjacent polarizers is cut to obtain a single polarizer.

And O, providing the flexible substrate, the luminous layer and the packaging layer 20 which are already stacked, removing the first release film, attaching the fourth bonding layer 16 to the packaging layer 20, removing the second release film, and attaching the cover plate 22 to the first bonding layer 12.

Taking the display panel in fig. 3 as an example, the preparation process may be:

A. the flexible substrate, the light emitting layer, and the encapsulating layer 20 are provided after being stacked.

B. An amorphous silicon layer 30 is formed on the encapsulation layer 20 using a chemical vapor deposition method.

C. A retardation film 1020 is formed 1/4 on the amorphous silicon layer 30 by coating.

D. A tamper resistant layer 1024 is formed on 1/4 retardation film 1020 by coating or chemical vapor deposition.

E. A retardation film 1022 is formed 1/2 by coating on the interference-suppressing layer 1024.

F. The third adhesive layer 104 is formed on the 1/2 retardation film 1022 by coating.

G. The linear polarizing film 100 is coated on the third adhesive layer 104.

H. The first adhesive layer 12 is formed on the linear polarizing film 100.

I. The first adhesive layer 12 and the side of the polarizing structure 10 are coated to form a second adhesive layer 14.

J. The cover plate 22 is attached to the first adhesive layer 12 side.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.

Claims

1. A polarizer, comprising:

2. The polarizer according to claim 1, wherein the polarizing structure comprises a linear polarizing film and a phase difference layer disposed in a stack.

3. The polarizer of claim 2, wherein the polarizing structure further comprises a third adhesive layer between the linear polarizing film and the phase difference layer, the third adhesive layer being in contact with the second adhesive layer, and the third adhesive layer comprises an optical glue and water blocking particles dispersed in the optical glue.

4. The polarizer of claim 2, wherein the phase difference layer comprises 1/4 phase difference film, 1/2 phase difference film, the 1/2 phase difference film is close to the linear polarizing film relative to the 1/4 phase difference film, and a tamper-resistant layer is arranged between the 1/4 phase difference film and the 1/2 phase difference film.

5. The polarizer of claim 4 wherein the tamper resistant layer comprises an optical glue and water blocking particles dispersed in the optical glue.

6. The polarizer of claim 4 wherein the interference rejection layer is an amorphous silicon layer.

7. The polarizer of claim 2, further comprising a fourth adhesive layer disposed on a side of the phase difference layer away from the linearly polarizing film, the fourth adhesive layer being in contact with the second adhesive layer, and the fourth adhesive layer comprising an optical glue and water blocking particles dispersed in the optical glue.

8. A display panel comprising the polarizer according to any one of claims 1 to 7.

9. The display panel according to claim 8, further comprising an encapsulation layer, and an amorphous silicon layer between the encapsulation layer and the polarization structure.