CN115598757A - Polarizing plate and flexible display module - Google Patents

Polarizing plate and flexible display module Download PDF

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Publication number
CN115598757A
CN115598757A CN202110721235.XA CN202110721235A CN115598757A CN 115598757 A CN115598757 A CN 115598757A CN 202110721235 A CN202110721235 A CN 202110721235A CN 115598757 A CN115598757 A CN 115598757A
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layer
film layer
protective
film
polyvinyl alcohol
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CN202110721235.XA
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Chinese (zh)
Inventor
刘赛
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Beijing Xiaomi Mobile Software Co Ltd
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Beijing Xiaomi Mobile Software Co Ltd
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Priority to CN202110721235.XA priority Critical patent/CN115598757A/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
    • G02B5/305—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks including organic materials, e.g. polymeric layers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/14—Protective coatings, e.g. hard coatings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3083—Birefringent or phase retarding elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Polarising Elements (AREA)

Abstract

The disclosure relates to a polarizing plate and a flexible display module, and belongs to the technical field of display. The polarizing plate includes: the protective film comprises a polyvinyl alcohol film layer, a first protective layer and a second protective layer, wherein the first protective layer and the second protective layer are respectively contacted with two opposite surfaces of the polyvinyl alcohol film layer; at least one of the first protective layer and the second protective layer is an ultra-thin glass layer. The ultra-thin glass layer is used for protecting the polyvinyl alcohol film layer which plays a role in polarization, and the impact resistance of the polarizer can be improved. In addition, the ultrathin glass layer has certain hardness and can replace a protective film layer which plays the same protective role in the traditional polarizing plate, so that the ultrathin glass layer with extremely thin thickness is also beneficial to reducing the thickness of the polarizing plate.

Description

Polarizing plate and flexible display module
Technical Field
The disclosure relates to the technical field of display, in particular to a polarizing plate and a flexible display module.
Background
Polarizing plates (polalizers, POL), also called polarizers, have optical characteristics of high transmittance and high degree of polarization, and are widely used for imaging of liquid crystal displays.
In the related art, a polarizing plate includes: the film comprises a Polyvinyl alcohol (PVA) layer, two cellulose Triacetate (TCA) layers, a Pressure sensitive adhesive (PVA) layer, a release film layer and a protective film layer, wherein the Polyvinyl alcohol film layer playing a role of polarization is positioned between the two cellulose triacetate film layers, and the one cellulose triacetate film layer, the Pressure sensitive adhesive layer and the release film layer are sequentially stacked.
However, the above polarizer has to have improved impact resistance and a large thickness.
Disclosure of Invention
To overcome the problems in the related art, the present disclosure provides a polarizer and a flexible display module.
According to a first aspect of embodiments of the present disclosure, there is provided a polarizer, comprising: the protective film comprises a polyvinyl alcohol film layer, a first protective layer and a second protective layer, wherein the first protective layer and the second protective layer are respectively contacted with two opposite surfaces of the polyvinyl alcohol film layer;
at least one of the first protective layer and the second protective layer is an ultra-thin glass layer.
In some possible implementations, the ultra-thin glass layer has a thickness of less than 50 microns.
In some possible implementations, one of the first protective layer and the second protective layer is the ultra-thin glass layer and the other is a protective film layer;
the protective film layer is a cellulose triacetate film layer, a polymethyl methacrylate film layer, a polyethylene glycol terephthalate film layer, a cyclic olefin polymer film layer, a polycarbonate film layer, a polyimide film layer or a polydimethylsiloxane film layer.
In some possible implementations, one of the first protective layer and the second protective layer is the ultra-thin glass layer, and the other is a retardation film layer or a reflective film layer.
In some possible implementations, the polarizer further includes a functional film layer configured to make the polarizer have a set function.
In some possible implementations, the functional film layer is a phase difference film layer or a reflection film layer.
In some possible implementations, the functional film layer is in contact with a surface of the ultra-thin glass layer facing away from the polyvinyl alcohol film layer.
In some possible implementations, one of the first protective layer and the second protective layer is the ultra-thin glass layer, and the other is a protective film layer;
the functional film layer is in contact with the surface of the protective film layer, which is far away from the polyvinyl alcohol film layer.
In some possible implementations, the polarizer further includes: the pressure-sensitive adhesive layer is used for enabling the polarizing film to have adhesiveness;
the release film layer is used for contacting with one surface of the pressure-sensitive adhesive layer.
According to a second aspect of the embodiments of the present disclosure, a flexible display module is provided, where the flexible display module includes any one of the above polarizers.
In some possible implementations, the flexible display module includes: the flexible substrate, the screen layer, the polarizer and the surface protection layer are sequentially laminated;
the surface protection layer is of a single-layer film structure.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
the polarizing plate provided by the embodiment of the disclosure utilizes the folding performance and good hardness characteristic of the ultrathin glass, so that the ultrathin glass is used in the polarizing plate, the ultrathin glass layer is in contact with at least one surface of the polyvinyl alcohol film layer, and the polyvinyl alcohol film layer playing a role of polarization is protected by utilizing the ultrathin glass layer, which is beneficial to improving the impact resistance of the polarizing plate. In addition, the ultrathin glass layer has certain hardness and can replace a protective film layer which plays the same protective role in the traditional polarizing plate, so that the ultrathin glass layer with extremely thin thickness is also beneficial to reducing the thickness of the polarizing plate.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
Fig. 1 is a schematic diagram illustrating a structure of a first type of polarizer according to an exemplary embodiment.
Fig. 2 is a schematic diagram illustrating a structure of a second type of polarizer according to an exemplary embodiment.
Fig. 3 is a schematic diagram illustrating a structure of a third type of polarizer according to an exemplary embodiment.
Fig. 4 is a schematic diagram illustrating a structure of a fourth type of polarizer according to an exemplary embodiment.
Fig. 5 is a schematic diagram illustrating a fifth type of polarizer according to an exemplary embodiment.
Fig. 6 is a schematic view illustrating a structure of a sixth kind of polarizing plate according to an exemplary embodiment.
Fig. 7 is a schematic view illustrating a structure of a seventh type of polarizer according to an exemplary embodiment.
Fig. 8 is a schematic structural view illustrating an eighth type of polarizing plate according to an exemplary embodiment.
Fig. 9 is a schematic structural diagram illustrating a ninth type of polarizing plate according to an exemplary embodiment.
Fig. 10 is a schematic view illustrating a structure of a tenth polarizing plate according to an exemplary embodiment.
Fig. 11 is a schematic view illustrating a structure of an eleventh polarizing plate according to an exemplary embodiment.
Fig. 12 is a schematic view illustrating a structure of a twelfth kind of polarizer according to an exemplary embodiment.
Fig. 13 is a schematic view illustrating a structure of a thirteenth polarizing plate according to an exemplary embodiment.
Fig. 14 is a schematic view illustrating a structure of a fourteenth kind of polarizer according to an exemplary embodiment.
Fig. 15 is a schematic structural diagram illustrating a fifteenth type of polarizing plate according to an exemplary embodiment.
Fig. 16 is a schematic structural view of a functional film layer shown according to an exemplary embodiment.
Fig. 17 is a schematic structural diagram of a flexible display module according to an exemplary embodiment.
The reference numerals denote:
1-a polyvinyl alcohol film layer, wherein,
2-the first protective layer is provided with,
3-a second protective layer, which is,
20-an ultra-thin glass layer, wherein,
30-a protective film layer, wherein the protective film layer,
4-a functional film layer, wherein the functional film layer,
41-phase difference film, 42-reflection film,
5-a pressure-sensitive adhesive layer,
6-a release film layer, wherein the release film layer,
100-a sheet of polarized light,
200-a flexible substrate, the flexible substrate,
300-the layer of the screen-the layer,
400-surface protection layer.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
Polarizing plates (polalizers, POL), also called polarizers, have optical characteristics of high transmittance and high degree of polarization, and are widely used for imaging of liquid crystal displays.
In the related art, a polarizing plate includes: the film comprises a Polyvinyl alcohol (PVA) film layer, two cellulose Triacetate (TCA) film layers, a Pressure sensitive adhesive (PVA) layer and a release film layer, wherein the Polyvinyl alcohol film layer playing a role of polarization is positioned between the two cellulose triacetate film layers, and the one cellulose triacetate film layer, the Pressure sensitive adhesive layer and the release film layer are sequentially stacked. However, the related art provides a polarizer whose impact resistance is to be improved.
The disclosed embodiment provides a polarizer, as shown in fig. 1 to fig. 3, the polarizer includes: the protective film comprises a polyvinyl alcohol film layer 1, a first protective layer 2 and a second protective layer 3, wherein the first protective layer 2 and the second protective layer 3 are respectively contacted with two opposite surfaces of the polyvinyl alcohol film layer 1; at least one of the first protective layer 2 and the second protective layer 3 is an ultra-thin glass layer 20. Wherein, fig. 2 shows that the first protective layer 2 and the second protective layer 3 both adopt an ultra-thin glass layer 20, and fig. 3 shows that one of the first protective layer 2 and the second protective layer 3 is the ultra-thin glass layer 20.
For the polyvinyl alcohol film layer 1, it is made of a polyvinyl alcohol film after dyeing and stretching, in the embodiment of the present disclosure, the polyvinyl alcohol film layer 1 may be an iodine-based polarizing layer, or may be a dye-based polarizing layer. For example, the polyvinyl alcohol film 1 of iodine system absorbs the two-way absorption molecules of iodine and then extends and aligns to perform the polarization function, so the polyvinyl alcohol film 1 is also called as a polarizer, which determines the polarization performance and transmittance of the polarizer and affects the color tone and optical durability of the polarizer.
However, since the polarizing layer made of the polyvinyl alcohol film layer 1 is liable to absorb water and discolor to lose the polarizing property, the polyvinyl alcohol film layer 1 needs to be protected from moisture and air.
The ultrathin glass layer 20 has good optical uniformity and transparency when having good hardness and flexibility, the ultrathin glass layer 20 is used as a protective layer to be in contact with the polyvinyl alcohol film layer 1, the polyvinyl alcohol film layer 1 can be protected, the ultrathin glass layer 20 can be used as a support body of the polyvinyl alcohol film layer 1, the fact that the extended polyvinyl alcohol film layer 1 cannot retract is guaranteed, the ultrathin glass layer 20 also protects the polyvinyl alcohol film layer 1 from being damaged by water vapor and other external substances, and the use stability of the polarizing plate is guaranteed.
The Ultra-thin glass layer 20 is made of Ultra-thin glass (UTG), and the Ultra-thin glass with a thickness of less than 200 μm is also called Ultra-thin flexible glass, which has folding property, and also has good hardness, flexibility, corrosion resistance and hydrophobic property. Compared with the ultra-thin glass layer 20, the protective film layer made of other materials, such as the cellulose triacetate film layer, has larger thickness under the condition of achieving the same supporting force. Therefore, the ultrathin glass layer 20 is used for replacing the traditional protective film layer, the strength of the polarizing film is improved, the polyvinyl alcohol film layer 1 is protected, the polyvinyl alcohol film layer 1 is effectively protected, and the thickness of the polarizing film is reduced.
In the disclosed embodiment, the thickness of the ultra-thin glass layer 20 is desirably less than or equal to 100 micrometers, further less than or equal to 50 micrometers, further less than or equal to 30 micrometers, further less than or equal to 20 micrometers, so as to facilitate reducing the thickness of the polarizing plate.
In some examples, as shown in fig. 2, the number of ultra-thin glass layers 20 is two, and the two ultra-thin glass layers 20 are respectively in contact with two opposite surfaces of the polyvinyl alcohol film layer 1.
In some examples, as shown in fig. 3, the number of ultra-thin glass layers 20 is one, and the ultra-thin glass layer 20 is in contact with one of the surfaces of the polyvinyl alcohol film layer 1.
The polarizing plate provided by the embodiment of the disclosure utilizes the folding performance and good hardness characteristic of the ultrathin glass, so that the ultrathin glass is used in the polarizing plate, the ultrathin glass layer 20 is in contact with at least one surface of the polyvinyl alcohol film layer 1, and the polyvinyl alcohol film layer 1 playing a role of polarization is protected by the ultrathin glass layer 20, which is beneficial to improving the impact resistance of the polarizing plate. In addition, because the ultrathin glass layer 20 has certain hardness, the ultrathin glass layer 20 can replace the protective film layer 30 which plays the same role of protection in the traditional polarizer, and the ultrathin glass layer 20 with the extremely thin thickness is also favorable for reducing the thickness of the polarizer.
In some possible implementations, embodiments of the present disclosure provide a polarizing plate in which the thickness of the ultra-thin glass layer 20 is less than 50 microns, such as 30 microns to 50 microns, 20 microns to 30 microns, 10 microns to 30 microns, and the like. An ultra-thin glass layer 20 of such a thickness facilitates reducing the thickness of the polarizer.
In some possible implementations, as shown in fig. 3, one of the first protective layer 2 and the second protective layer 3 is an ultra-thin glass layer 20, and the other is a protective film layer 30. That is, the polyvinyl alcohol film layer 1 is protected by only one ultra-thin glass layer 20, and the protective film layer 30 and the ultra-thin glass layer 20 are in contact with both surfaces of the polyvinyl alcohol film layer 1 opposite to each other, respectively.
The protection film layer 30 has optical grade transparency to avoid affecting the polarization performance of the polarizer, and the protection film layer 30 may only perform a protection function, or may further perform other functions.
In some possible implementations, the protective film layer 30 includes, but is not limited to, the following: a triacetyl cellulose (TAC) film layer, a Polymethyl methacrylate (PMMA) film layer, a Polyethylene terephthalate (PET) film layer, a Cyclo Olefin Polymer (COP) film layer, a Polycarbonate (PC) film layer, a Polyimide (PI) film layer, a Polyethylene (PE) film layer, or a Polydimethylsiloxane (PDMS) film layer.
For a cellulose Triacetate (TAC) film layer, the film has excellent light uniformity, transparency, acid and alkali resistance and ultraviolet resistance, and can be used as a support body of a polyvinyl alcohol film to ensure that the extended polyvinyl alcohol film cannot retract. In addition, the polyvinyl alcohol film is protected from being damaged by water vapor, ultraviolet rays and other external substances, and the environmental weather resistance of the polarizing plate is ensured.
Particularly, the cellulose triacetate film layer with ultraviolet isolation and anti-dazzle functions can be prepared into an ultraviolet-proof polaroid and an anti-dazzle polaroid.
For Polymethyl methacrylate (PMMA) film, also called as CAT film, it can reach optical grade transparency, and can protect polyvinyl alcohol layer basically the same as cellulose triacetate film.
Polyethylene terephthalate (PET) film, cyclic Olefin Polymer (COP) film, polycarbonate (PC) film, polyimide (PI) film, polyethylene (PE) film, or Polydimethylsiloxane (PDMS) film, all of which can play substantially the same protective role as cellulose triacetate (tac) film.
The film layer of polyethylene glycol terephthalate is prepared from polyethylene glycol terephthalate, the film layer of polycarbonate is prepared from polycarbonate, and the film layer of polyethylene glycol terephthalate and the film layer of polycarbonate both have high transparency and good rigidity, and can also play an excellent role in protecting the polaroid.
The cycloolefin polymer film layer is prepared from a cycloolefin polymer, has the advantages of high transparency, low birefringence, low water absorption, high rigidity, high heat resistance, good water vapor tightness and the like, and can also play an excellent role in protecting a polarizer.
The polyimide film layer is prepared from polyimide, has good folding performance, is suitable for being frequently bent, and is beneficial to improving the folding resistance of the polarizing film.
The polydimethylsiloxane film layer is prepared from polydimethylsiloxane, has full transparency, excellent elasticity, gas permeability, thermal stability and flexibility, and can play an excellent role in protecting a polarizing plate.
In some possible implementations, as shown in fig. 4 or fig. 5, one of the first protective layer 2 and the second protective layer 3 is the ultra-thin glass layer 20, and the other is the phase difference film layer 41 or the reflective film layer 42. The retardation film 41 can make the polarizer have a retardation compensation function, and the reflection film 42 can make the polarizer have an external light reflection function.
In some possible implementations, as shown in fig. 6 to fig. 7, the polarizer provided in the embodiments of the present disclosure further includes a functional film layer 4, where the functional film layer 4 is configured to enable the polarizer to have a set function, for example, the function may be an ambient light reflection function, a phase difference compensation function, or the like.
One of the surfaces of the functional film layer 4 may be in contact with the ultra-thin glass layer 20 (see fig. 6), or may also be in contact with the protective film layer 30 (see fig. 7).
For example, the functional film 4 can be a retardation film, a reflective film, etc. The retardation film layer, also called as a compensation film, can compensate the retardation of the liquid crystal material, and plays a role in improving the contrast of the liquid crystal display, viewing angle and correcting display color.
For the phase difference film layer, it can be a single layer, or a plurality of layers, the common phase difference film layer generally corresponds to a single wavelength, for example, the common 1/4 λ phase difference film, if it is desired to achieve the wide wavelength compensation effect, two or more layers of phase difference film layers can be used for addition subtraction, for example, a material with small refractive index distribution difference is used to make a 1/2 λ phase difference film, and then the 1/4 λ phase difference film and the 1/4 λ phase difference film with the narrow-band normal distribution are stacked in a certain direction, so as to achieve the purpose of forming the wide-band coverage by the visible light band.
The retardation film can be prepared by a photo-alignment method, and the retardation film can be prepared by coating liquid crystal on a photo-alignment layer (photo-alignment layer) subjected to alignment so as to perform homeotropic alignment of liquid crystal molecules and then curing the liquid crystal molecules. This is because the liquid crystal molecules have different refractive indices in different axial directions, which is also called birefringence or birefringence, so that when light passes through the liquid crystal molecules, the polarization direction of the light is changed and an optical retardation phenomenon (optical retardation) occurs, thereby generating a phase difference. Therefore, the aligned liquid crystal molecules are arranged along the alignment direction to form a liquid crystal layer, which can be used as a retardation film.
In the embodiment of the present disclosure, the liquid crystal layer may be one layer or two layers (see fig. 16, which shows that a functional layer 4 is formed by using a liquid crystal layer 401 and a liquid crystal layer 402) to obtain retardation films with different compensation effects, for example, when used for forming a 1/4 λ retardation film, two liquid crystal layers may be used.
In some examples, as shown in fig. 2, liquid crystal coating may be performed on the surface of the ultra-thin glass layer 20 to form two liquid crystal layers 41 instead of the 1/4 λ retardation film, and the deformation amount of the ultra-thin glass layer 20 is smaller than that of the conventional 1/4 λ retardation film, so as to avoid being broken by stretching.
The reflecting film layer has high reflectivity, and can reflect external light back to be used as a display light source. The reflective film layer may be a total reflection film or a half-reflective and half-transmissive film. The materials of the reflective film include, but are not limited to: aluminum, gold, silver, and the like.
The arrangement position of the functional film layer 4 in the polarizer can be various, and the position of the functional film layer 4 can be adaptively determined according to actual requirements:
for example, the functional film layer 4 is in contact with the surface of the polyvinyl alcohol film layer 1 facing away from the ultra-thin glass layer 20. Alternatively, the functional film layer 4 is in contact with the surface of the ultra-thin glass layer 20 facing away from the polyvinyl alcohol film layer 1. Or the functional film layer 4 is contacted with the surface of the protective film layer 30 of the polarizer, which is far away from the polyvinyl alcohol film layer 1.
In some possible implementations, as shown in fig. 8-15, the polarizer further includes: pressure-sensitive adhesive layer 5 and from type rete 6, pressure-sensitive adhesive layer 5 is used for making the polarizing film have the adhesion, contacts from type rete 6 and pressure-sensitive adhesive layer 5's a surface.
A Pressure Sensitive Adhesive (PSA) layer, also called a PSA layer, is used to provide the polarizer with a certain adhesiveness, so that the polarizer can be attached to other components, and the PSA layer generally has good transparency and does not affect the polarization performance of the polarizer. The thickness of the pressure sensitive adhesive layer 5 may be 15 micrometers to 25 micrometers, for example 20 micrometers.
One surface of the pressure-sensitive adhesive layer 5 may be in contact with the surface of the ultrathin glass layer 20 facing away from the polyvinyl alcohol layer, may be in contact with the surface of the protective film layer 30 facing away from the polyvinyl alcohol layer, or may be in contact with the surface of the functional film layer 4 facing away from the polyvinyl alcohol layer.
When setting up pressure sensitive adhesive layer 5 on the polarized light piece, generally still need be equipped with from type rete 6, contact from another surface of the pressure sensitive adhesive layer 5 of type rete 6 to protect pressure sensitive adhesive layer 5, produce the laminating bubble or by the pollutant pollution when avoiding follow-up laminating to use.
For example, the release film layer 6 may be made of polyethylene terephthalate, which has the characteristics of high strength, difficult deformation, good transparency, high surface flatness, and the like, and has good peelability.
The thicknesses of other film layers included in the polarizing plate, except for the ultra-thin glass layer 20, are not particularly limited, and may be adaptively designed according to actual use scenarios.
In combination with the above description of the film layers included in the polarizer, the following description is made for the structure of some polarizers provided in the embodiments of the present disclosure:
in some examples, as shown in fig. 8, embodiments of the present disclosure provide a polarizing plate including: the pressure-sensitive adhesive comprises a polyvinyl alcohol film layer 1, two ultrathin glass layers 20, a pressure-sensitive adhesive layer 5 and a release film layer 6, wherein the two ultrathin glass layers 20 are respectively contacted with two opposite surfaces of the polyvinyl alcohol film layer 1, one surface of the pressure-sensitive adhesive layer 5 is contacted with the surface, deviating from the polyvinyl alcohol film layer 1, of one ultrathin glass layer 20, and the other surface of the pressure-sensitive adhesive layer 5 is contacted with the release film layer 6.
In some examples, as shown in fig. 9, embodiments of the present disclosure provide a polarizing plate including: the multifunctional glass film comprises a polyvinyl alcohol film layer 1, two ultrathin glass layers 20, a functional film layer 4, a pressure-sensitive adhesive layer 5 and a release film layer 6, wherein the two ultrathin glass layers 20 are respectively contacted with two opposite surfaces of the polyvinyl alcohol film layer 1, the functional film layer 4 is contacted with the surface, deviating from the polyvinyl alcohol film layer 1, of one ultrathin glass layer 20, one surface of the pressure-sensitive adhesive layer 5 is contacted with the surface, deviating from the ultrathin glass layer 20, of the functional film layer 4, and the other surface of the pressure-sensitive adhesive layer 5 is contacted with the release film layer 6.
In some examples, as shown in fig. 10, embodiments of the present disclosure provide a polarizing plate including: the pressure-sensitive adhesive comprises a polyvinyl alcohol film layer 1, an ultrathin glass layer 20, a protective film layer 30, a pressure-sensitive adhesive layer 5 and a release film layer 6, wherein the ultrathin glass layer 20 and the protective film layer 30 are respectively contacted with two opposite surfaces of the polyvinyl alcohol film layer 1, one surface of the pressure-sensitive adhesive layer 5 is contacted with the surface, deviating from the polyvinyl alcohol film layer 1, of the ultrathin glass layer 20, and the other surface of the pressure-sensitive adhesive layer 5 is contacted with the release film layer 6. The protective film layer 30 is a cellulose triacetate film layer, a polymethyl methacrylate film layer, a polyethylene terephthalate film layer, a cycloolefin polymer film layer, a polycarbonate film layer, a polyimide film layer, a polydimethylsiloxane film layer, or the like.
In some examples, as shown in fig. 11, embodiments of the present disclosure provide a polarizing plate including: the pressure-sensitive adhesive comprises a polyvinyl alcohol film layer 1, an ultrathin glass layer 20, a protective film layer 30, a pressure-sensitive adhesive layer 5 and a release film layer 6, wherein the ultrathin glass layer 20 and the protective film layer 30 are respectively contacted with two opposite surfaces of the polyvinyl alcohol film layer 1, one surface of the pressure-sensitive adhesive layer 5 is contacted with the surface, deviating from the polyvinyl alcohol film layer 1, of the protective film layer 30, and the other surface of the pressure-sensitive adhesive layer 5 is contacted with the release film layer 6. The protective film layer 30 is a cellulose triacetate film layer, a polymethyl methacrylate film layer, a polyethylene terephthalate film layer, a cycloolefin polymer film layer, a polycarbonate film layer, a polyimide film layer, a polydimethylsiloxane film layer, or the like.
In some examples, as shown in fig. 12, embodiments of the present disclosure provide a polarizing plate including: the glass substrate comprises a polyvinyl alcohol film layer 1, an ultrathin glass layer 20, a functional film layer 4, a pressure-sensitive adhesive layer 5 and a release film layer 6, wherein the ultrathin glass layer 20 and the functional film layer 4 are respectively contacted with two opposite surfaces of the polyvinyl alcohol film layer 1, one surface of the pressure-sensitive adhesive layer 5 is contacted with the surface, deviating from the polyvinyl alcohol film layer 1, of the ultrathin glass layer 20, and the other surface of the pressure-sensitive adhesive layer 5 is contacted with the release film layer 6. The functional film layer 4 may be a reflective film layer or a phase difference film layer.
In some examples, as shown in fig. 13, embodiments of the present disclosure provide a polarizing plate including: the multifunctional glass film comprises a polyvinyl alcohol film layer 1, an ultrathin glass layer 20, a functional film layer 4, a pressure-sensitive adhesive layer 5 and a release film layer 6, wherein the ultrathin glass layer 20 and the functional film layer 4 are respectively contacted with two opposite surfaces of the polyvinyl alcohol film layer 1, one surface of the pressure-sensitive adhesive layer 5 is contacted with the surface, deviating from the polyvinyl alcohol film layer 1, of the functional film layer 4, and the other surface of the pressure-sensitive adhesive layer 5 is contacted with the release film layer 6. The functional film layer 4 may be a reflective film layer or a phase difference film layer.
In some examples, as shown in fig. 14, embodiments of the present disclosure provide a polarizing plate including: polyvinyl alcohol film layer 1, ultrathin glass layer 20, protective film layer 30, functional film layer 4, pressure sensitive adhesive layer 5 and release film layer 6. The ultrathin glass layer 20 and the protective film layer 30 are respectively contacted with two opposite surfaces of the polyvinyl alcohol film layer 1, the functional film layer 4 is contacted with the surface of the ultrathin glass layer 20, which is far away from the polyvinyl alcohol film layer 1, one surface of the pressure-sensitive adhesive layer 5 is contacted with the surface of the functional film layer 4, which is far away from the ultrathin glass layer 20, and the other surface of the pressure-sensitive adhesive layer 5 is contacted with the release film layer 6.
The protective film layer 30 is a cellulose triacetate film layer, a polymethyl methacrylate film layer, a polyethylene terephthalate film layer, a cycloolefin polymer film layer, a polycarbonate film layer, a polyimide film layer, a polydimethylsiloxane film layer, or the like. The functional film layer 4 may be a reflective film layer or a phase difference film layer.
In some examples, as shown in fig. 15, embodiments of the present disclosure provide a polarizing plate including: the film comprises a polyvinyl alcohol film layer 1, an ultrathin glass layer 20, a protective film layer 30, a functional film layer 4, a pressure-sensitive adhesive layer 5 and a release film layer 6. The ultrathin glass layer 20 and the protective film layer 30 are respectively in contact with two opposite surfaces of the polyvinyl alcohol film layer 1, the functional film layer 4 is in contact with the surface of the protective film layer 30, which is far away from the polyvinyl alcohol film layer 1, one surface of the pressure-sensitive adhesive layer 5 is in contact with the surface of the functional film layer 4, which is far away from the protective film layer 30, and the other surface of the pressure-sensitive adhesive layer 5 is in contact with the release film layer 6.
The protective film layer 30 is a cellulose triacetate film layer, a polymethyl methacrylate film layer, a polyethylene terephthalate film layer, a cycloolefin polymer film layer, a polycarbonate film layer, a polyimide film layer, a polydimethylsiloxane film layer, or the like. The functional film layer 4 may be a reflective film layer or a phase difference film layer.
According to a second aspect of the embodiments of the present disclosure, a flexible display module is provided, where the flexible display module includes any one of the above polarizers.
The Flexible display module provided by the embodiment of the disclosure can not only satisfy the bending property of the Flexible OLED, but also be beneficial to reducing the thickness of the Flexible display module based on the use of the above polarizing film.
As shown in fig. 17, in addition to the polarizer 100, the flexible display module further includes a flexible substrate 200, a screen layer 300, and a surface protection layer 400, wherein the flexible substrate 200, the screen layer 300, the polarizer, and the surface protection layer 400 are sequentially stacked.
The surface protection layer 400 is adhered to the surface of the polarizer by an Optical Clear Adhesive (OCA). The surface protection layer 400 is generally a multilayer film structure, and may be, for example, two polyimide film layers bonded by optical adhesive, or a combination of a polyimide film layer and an ultra-thin glass layer bonded by optical adhesive.
On the basis of using the polarizing plate provided by the embodiment of the present disclosure, the structure of the conventional surface protection film layer may be simplified by the flexible display module provided by the embodiment of the present disclosure, for example, an ultra-thin glass layer or a polyimide film layer may be omitted, so that the surface protection layer 400 may be a single-layer film structure.
That is, the disclosed embodiment provides such a flexible display module, as shown in fig. 17, which includes: the flexible substrate 200, the screen layer 300, the polarizer 100 and the surface protection layer 400 are sequentially stacked, wherein the surface protection layer 400 is a single-layer film structure, such as a single-layer polyimide film layer.
The flexible display module according to the embodiment of the present disclosure may be used in various display devices, for example, a mobile phone, a watch, a notebook computer, a tablet computer, a television, and the like.
All the above optional technical solutions may be combined arbitrarily to form the optional embodiments of the present disclosure, and are not described herein again.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (11)

1. A polarizing plate, comprising: the protective film comprises a polyvinyl alcohol film layer (1), a first protective layer (2) and a second protective layer (3), wherein the first protective layer (2) and the second protective layer (3) are respectively contacted with two opposite surfaces of the polyvinyl alcohol film layer (1);
at least one of the first protective layer (2) and the second protective layer (3) is an ultra-thin glass layer (20).
2. The polarizer of claim 1, wherein the ultra-thin glass layer (20) has a thickness of less than 50 microns.
3. A polarizing plate as claimed in claim 1, characterized in that one of the first protective layer (2) and the second protective layer (3) is the ultra-thin glass layer (20) and the other is a protective film layer (30);
the protective film layer (30) is a cellulose triacetate film layer, a polymethyl methacrylate film layer, a polyethylene glycol terephthalate film layer, a cyclic olefin polymer film layer, a polycarbonate film layer, a polyimide film layer or a polydimethylsiloxane film layer.
4. The polarizing plate of claim 1, wherein one of the first protective layer (2) and the second protective layer (3) is the ultra-thin glass layer (20) and the other is a retardation film layer (41) or a reflective film layer (42).
5. The polarizer according to any of claims 1 to 3, further comprising a functional film layer (4), wherein the functional film layer (4) is configured to provide the polarizer with a set function.
6. The polarizing plate of claim 5, wherein the functional film layer (4) is a retardation film layer or a reflective film layer.
7. A polarizing sheet as claimed in claim 5, characterized in that the functional film layer (4) is in contact with the surface of the ultra-thin glass layer (20) facing away from the polyvinyl alcohol film layer (1).
8. The polarizing plate of claim 5, wherein one of the first protective layer (2) and the second protective layer (3) is the ultra-thin glass layer (20) and the other is a protective film layer (30);
the functional film layer (4) is in contact with the surface of the protective film layer (30) which is far away from the polyvinyl alcohol film layer (1).
9. The polarizer of any of claims 1-8, further comprising: the polarizing film comprises a pressure-sensitive adhesive layer (5) and a release film layer (6), wherein the pressure-sensitive adhesive layer (5) is used for enabling the polarizing film to have adhesiveness;
the release film layer (6) is used for contacting with one surface of the pressure-sensitive adhesive layer (5).
10. A flexible display module comprising the polarizer of any of claims 1-9.
11. The flexible display module of claim 10, wherein the flexible display module comprises: the flexible display screen comprises a polarizing plate (100), a flexible substrate (200), a screen body layer (300) and a surface protection layer (400);
the flexible substrate (200), the screen layer (300), the polarizer (100) and the surface protection layer (400) are sequentially stacked;
the surface protection layer (400) is of a single-layer film structure.
CN202110721235.XA 2021-06-28 2021-06-28 Polarizing plate and flexible display module Pending CN115598757A (en)

Priority Applications (1)

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CN202110721235.XA CN115598757A (en) 2021-06-28 2021-06-28 Polarizing plate and flexible display module

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110721235.XA CN115598757A (en) 2021-06-28 2021-06-28 Polarizing plate and flexible display module

Publications (1)

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