Polarizer and display panel

Abstract

This application provides a polarizer and a display panel. The polarizer includes a polarizing film layer, which includes a first surface and a second surface disposed opposite to each other along its thickness direction; a first protective film layer, stacked on the first surface; the first protective film layer includes a first material; and a second protective film layer, stacked on the second surface, which includes a second material; wherein the first material and the second material are a conjugate acid-base pair, so that the first protective film layer and the second protective film layer are a conjugate acid-base pair. This polarizer can improve the problem of edge failure of polarizers during alkaline sweat testing and will not cause the polarizer to turn red.

Description

Technical Field

[0001] This invention relates to the field of polarizer technology, and more particularly to a polarizer and a display panel. Background Technology

[0002] A polarizer is a sheet-like optical functional material that generates and detects polarized light. It has the characteristic of selectively absorbing light vibrations in different directions. When natural light shines on the film, only the light vibration components parallel to a specific direction are allowed to pass through, while the light vibration components perpendicular to a specific direction in the film are completely absorbed. The specific direction is called the polarization direction.

[0003] The polarizing film in a polarizer is called a polarizing film. This polarizing film is a polymer dyed with dichroic organic dyes and then stretched under specific humidity and temperature conditions to absorb the dichroic dyes and achieve polarization. After dehydration and drying, the polarizing film is formed. However, this type of polarizing film is hydrophilic and quickly deforms and shrinks in humid and hot environments. It also has low strength, is brittle and easily broken, making it inconvenient to use and difficult to process. Therefore, current technologies typically laminate a support film with high strength, high light transmittance, and resistance to humidity and heat onto both sides of the polarizing film to protect it.

[0004] Although the polarizing film is protected by supporting films on both sides, after the polarizer is cut, the cross-section of the polarizing film on the side of the polarizer is exposed to the external environment. Thus, in an alkaline sweat environment, the edges of the polarizer will experience severe failure, such as reddening. Summary of the Invention

[0005] The polarizer and display panel provided in this application aim to solve the problem that existing polarizers exhibit severe failure at the edges in alkaline sweat environments, such as reddening at the edges.

[0006] To solve the above-mentioned technical problems, one technical solution adopted in this application is to provide a polarizer and a display panel. The polarizer includes a polarizing film layer, including a first surface and a second surface disposed opposite to each other along its thickness direction; a first protective film layer, stacked on the first surface, the first protective film layer including a first material; and a second protective film layer, stacked on the second surface, the second protective film layer including a second material; wherein the first material and the second material are a conjugate acid-base pair, so that the first protective film layer and the second protective film layer are a conjugate acid-base pair.

[0007] Wherein, the difference between the pH value of the first material and the pH value of the polarizing film layer is not greater than 0.5; the difference between the pH value of the second material and the pH value of the polarizing film layer is not greater than 0.5;

[0008] Preferably, the pH value of the first material is the same as the pH value of the polarizing film layer; or the pH value of the second material is the same as the pH value of the polarizing film layer.

[0009] The polarizing film layer includes a third material with a pH value of 5 to 7, and the weight ratio of the first protective film layer to the second protective film layer is 1:0.81 to 1:3.74.

[0010] Wherein, the first protective film layer is an acidic film; the second protective film layer is a conjugate acid salt film corresponding to the acidic film;

[0011] Preferably, the pH value of the acidic membrane is 2.1 to 6.2.

[0012] Wherein, the first protective film layer is an alkaline film; the second protective film layer is a conjugate alkaline salt film corresponding to the alkaline film; or

[0013] The first protective film layer is a multi-component acid salt film; the second protective film layer is the conjugate secondary acid salt film corresponding to the multi-component acid salt film.

[0014] The weight ratio of the first protective film layer to the second protective film layer is 1:0.81 to 1:3.74.

[0015] The thickness of the acidic membrane and / or the conjugate acid salt membrane is 10 μm to 40 μm.

[0016] This also includes:

[0017] A first support film layer is disposed on the surface of the first protective film layer that is away from the polarizing film layer;

[0018] A surface protective film layer is disposed on the side of the first support film layer that is opposite to the first protective film layer;

[0019] The second support film layer is disposed on the side surface of the second protective film layer that is opposite to the polarizing film layer;

[0020] A pressure-sensitive adhesive layer is disposed on the surface of the second support film layer that is opposite to the second protective film layer;

[0021] A release film is disposed on the surface of the pressure-sensitive adhesive layer that is opposite to the second support film layer.

[0022] The polarizing film is a polyvinyl alcohol film, formed by dyeing with iodine ions.

[0023] To solve the above-mentioned technical problems, another technical solution adopted in this application is to provide a display panel that includes the polarizer mentioned above.

[0024] The beneficial effects of this application: Unlike the prior art, the polarizer and display panel provided in this application embodiment are different. The polarizer has a polarizing film layer, and a first protective film layer comprising a first material is stacked on the first surface of the polarizing film layer. A second protective film layer comprising a second material is stacked on the second surface of the polarizing film layer. The first material and the second material are conjugate acid-base pairs, so that the first and second protective film layers are conjugate acid-base pairs. Thus, in an alkaline sweat testing environment, when OH... - When ions contact the side edge of the polarizer, the first and second protective films can be used as an acid-base buffer system to buffer external OH groups. - For H in the polarizing film layer + Ions and OH - The effect of ions, that is, maintaining the H in the polarizing film layer + Ions and OH - The ion concentration remains constant; thus improving the alkaline OH content of external sweat. - The effect of ions on the edge failure of polarizers can be investigated to prevent the edges of polarizers from turning red. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a polarizer provided in an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the structure of a polarizer provided in another embodiment of this application;

[0028] Figure 3 This is a simplified structural diagram of the display panel provided in the embodiments of this application.

[0029] Explanation of icon numbers:

[0030] 10-Polarizing film; 11-Screen body; 101-Polarizing film layer; 102-First protective film layer; 103-Second protective film layer; 104-First support film layer; 105-Surface protective film layer; 106-Second support film layer; 107-Pressure-sensitive adhesive layer; 108-Release film. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0032] The terms "first," "second," and "third" in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. All directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationships and movements between components in a specific orientation (as shown in the figures). If the specific orientation changes, the directional indications also change accordingly. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0033] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0034] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0035] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a polarizer provided in an embodiment of this application; the polarizer 10 includes a polarizing film layer 101, a first protective film layer 102 and a second protective film layer 103.

[0036] The polarizing film layer 101 includes a first surface and a second surface disposed opposite to each other along its thickness direction; and the polarizing film layer 101 includes a third material. In one specific embodiment, the polarizing film layer 101 is formed by dyeing with iodine ions. Specifically, the polarizing film layer 101 is formed by dyeing a thin film of polyvinyl alcohol (PVA) resin with I3. - Ions and I5 - Ions were subjected to staining and extension treatments, and I3 was used to treat the staining and extension treatments. - Ions and I5 - Iodine ions are adsorbed into polyvinyl alcohol resins in an aligned state to form ions. Based on different iodine ion absorption spectra, I3... - Ions are used to absorb light in the wavelength range of 300 nm to 560 nm. - Ions are used to absorb light in the wavelength range of 395 nanometers to 700 nanometers.

[0037] The molecular chains of the untreated polarizing film 101 are randomly distributed, as are the iodine ions adsorbed on it. After being stretched by external force, the molecular chains extend in the direction of the external force, and the iodine ions on the polarizing film 101 become orderly distributed, thus acquiring polarizing function, with its transmission axis perpendicular to the stretching direction. Parallel gaps exist between the parallel-arranged iodine ions on the oriented stretched polarizing film 101. These gaps allow light beams with the same polarization direction as the iodine ion distribution direction to pass through, while blocking light beams with other polarization directions, filtering unpolarized light into polarized light.

[0038] It is understandable that the polarizing film layer 101 absorbs light, causing the display panel with the polarizer 10 to appear black when not displaying anything; while alkaline sweat contains OH... - Ions, OH - Ions will destroy I3 - Ions and I5 - The reversible equilibrium state of ions leads to I5 - Ion reduction, I3 - The increase in ions leads to severe failure problems and reddening of the edges of the polarizer 10.

[0039] The specific principle behind alkaline sweat causing polarizer 10 to malfunction and resulting in reddening at the edges of polarizer 10 is as follows:

[0040] I5 - The reaction of ions with absorption of long-wavelength light is as follows: after absorbing long-wavelength light, they generate water-soluble I₂ and I₃. - Ions, and I3 - Ions can continue to absorb short-wavelength light:

[0041]

[0042] I3 - The reaction of ions with absorption of short-wavelength light is as follows: after absorbing short-wavelength light, water-soluble I₂ and I₂ are generated. - ion:

[0043]

[0044] OH- in alkaline sweat - It will react with I2 in polarizing film layer 101, OH - It will damage I3 and I5. - The reversible equilibrium state of ions, which in turn leads to I5 - Reduce, I3 - The reaction formula for the increase is as follows:

[0045] 3I2 + 6OH - →5I - +IO3 - +3H2O

[0046] Specifically, the polarizing film 101 is a polyvinyl alcohol (PVA) film, mainly composed of light atoms such as carbon, hydrogen, and oxygen, and has the characteristics of high light transmittance and high ductility.

[0047] Specifically, the pH value of the third material is between 5 and 7. The other specific structures and functions of the polarizing film layer 101 are the same as or similar to those of existing polarizing layers, and can achieve the same or similar technical effects, so they will not be described in detail here.

[0048] A first protective film layer 102 is stacked on the first surface of the polarizing film layer 101, and the first protective film layer 102 includes a first material; a second protective film layer 103 is stacked on the second surface of the polarizing film layer 101 opposite to the first surface, and the second protective film layer 103 includes a second material; and the first material and the second material are conjugate acid-base pairs. Those skilled in the art will understand that, according to the acid-base proton theory, acids and bases always exist in pairs. An acid donates a proton to become its corresponding conjugate base, and a base receives a proton to become its corresponding conjugate acid. This relationship is called a conjugate relationship. For example, acetic acid (HAc) and acetate (Ac) - ), ammonia (NH3) and ammonium ions (NH4) + Both (H+ and OH-) are conjugate acid-base pairs. Conjugate systems can act as acid-base buffer systems, with the first and second materials maintaining a certain pH value, i.e., the balance between H+ and OH- ions. -The ion concentration remains stable and is not affected by the addition of small amounts of acid or alkali or solution dilution. It should be noted that the first, second, and third materials involved in the embodiments of this application can refer to a single material or a mixture of multiple materials.

[0049] Thus, in an alkaline sweat testing environment, when OH... - When ions contact the side edge of the polarizer 10, the first and second materials can be used as an acid-base buffer system to buffer external OH groups. - For the third material H + Ions and OH - The influence of ions, namely, maintaining H in the polarizing film layer 101 including the third material. + The concentrations of ions and OH- ions remain unchanged; thus improving the alkaline OH- ion concentration in external sweat. - The effect of ions on the edge failure of polarizer 10 is to avoid the reddish phenomenon at the edge of polarizer 10.

[0050] Specifically, the pH difference between the first material and the third material should not exceed 0.5, and the pH difference between the second material and the third material should not exceed 0.5. Preferably, the pH value of the first material is the same as the pH value of the polarizing film layer 101; or the pH value of the second material is the same as the pH value of the polarizing film layer 101. This ensures that the first or second material, acting as a conjugate acid-base pair, will not affect the pH value of the third material, i.e., it will not damage the I5 in the polarizing film layer 101. - Ions and I3 - The reversible equilibrium state of ions prevents the polarizer 10 from turning red or blue due to the first protective film layer 102 and the second protective film layer 103.

[0051] In one specific embodiment, the pH value of the third material is 5 to 7; the weight ratio of the first protective film layer 102 and the second protective film layer 103 is in the range of 1:0.81 to 1:3.7; so as to ensure that the difference between the pH value of the first material and the pH value of the third material is not greater than 0.5, and the difference between the pH value of the second material and the pH value of the third material should not be greater than 0.5.

[0052] Those skilled in the art will understand that the pH value of the first material is the same as the pH value of the first protective film layer 102, the pH value of the second material is the same as the pH value of the second protective film layer 103, and the pH value of the third material is the same as the pH value of the polarizing film layer 101.

[0053] Specifically, the thickness of the first protective film layer 102 and / or the second protective film layer 103 ranges from 10µm to 40µm.

[0054] In one specific embodiment, the first protective film layer 102 is an acidic film that completely covers the polarizing film layer 101. The material of the acidic film, i.e., the first material, can be one or more weak acids such as formic acid (HCOOH) and acetic acid (CH3COOH). Specifically, the pH range of the first material is: pH>1 and pH<7. At this time, the second protective film layer 103, which includes the second material, is a conjugate acid salt film corresponding to the acidic film including the first material, and also completely covers the polarizing film layer 101 including the third material. The material of the conjugate acid salt film, i.e., the second material, can be one or more weak acid salts such as sodium formate (HCOONa) and sodium acetate (CH3COONa) corresponding to weak acids.

[0055] Thus, during the alkaline sweat test, when OH... - When the ion-contact polarizer 10 is die-cut at its edge, the first protective film layer 102 and the second protective film layer 103 can act as an acid-base buffer system to buffer the OH groups in alkaline sweat. - H of polarizing film layer 101 + Ions and OH - The influence of ions; that is, to keep the H+ ions and ion concentration in the polarizing film layer 101, including the third material, constant; thereby reducing the probability of serious failure problems and reddening of the edges of the polarizer 10.

[0056] Preferably, when the first protective film layer 102 is an acidic film, the pH value of the first material is in the range of 2.1 to 6.2.

[0057] In a specific embodiment, when the pH value of the third material is 5, the first material and the second material can be prepared according to a weak acid and its corresponding salt buffer system. For example, the first material is acetic acid (CH3COOH) and the second material is sodium acetate (CH3COONa). Specifically, the weight ratio of acetic acid and sodium acetate is 1:0.81, and the pH value of the acid-base conjugate buffer system formed by the first material and the second material is between 3.75 and 5.75.

[0058] In a specific embodiment, when the pH value of the third material is 7, the first material and the second material can be prepared according to the acid salt of a polybasic weak acid and its corresponding secondary salt buffer system. For example, the first material is sodium hypophosphite (NaH2PO4), and the second material is disodium hydrogen phosphate (Na2HPO4). Specifically, the weight ratio of sodium hypophosphite and disodium hydrogen phosphate is 1:3.74, and the pH value of the acid-base conjugate buffer system formed by the first material and the second material is between 6.21 and 8.21.

[0059] In a specific embodiment, when the pH value of the third material is 8, the first material and the second material can be prepared according to the acidic salt of a polybasic weak acid and its corresponding secondary salt buffer system. For example, the first material is sodium hypophosphite (NaH2PO4), and the second material is disodium hydrogen phosphate (Na2HPO4). Specifically, the weight ratio of sodium hypophosphite and disodium hydrogen phosphate is 1:40.01, and the pH value of the acid-base conjugate buffer system formed by the first material and the second material is between 6.21 and 8.21.

[0060] In another specific embodiment, the first protective film layer 102 can also be an alkaline film, such as ammonia (NH3·H2O). The second protective film layer 103, including the second material, is a conjugate alkaline salt film corresponding to the alkaline film including the first material, such as ammonium chloride (NH4Cl). Of course, in other embodiments, the first protective film layer 102 including the first material can also be a polybasic acid salt film; the second protective film layer 103 including the second material is a conjugate secondary acid salt film corresponding to the polybasic acid salt film, such as sodium hypophosphite (NaH2PO4) and anhydrous disodium hydrogen phosphate (Na2HPO4).

[0061] This embodiment utilizes a conjugate acid-base system formed by a first protective film layer 102 comprising a first material and a second protective film layer 103 comprising a second material, serving as an acid-base buffer system. In an alkaline environment, the weak acid portion of the first and second materials can be converted into a weak acid salt. Because the weak acid cannot completely ionize in water, and the weak acid salt is soluble in water, the pH value changes little, maintaining the solution's pH value essentially unchanged; this avoids the influence of external alkaline sweat on the pH value of the polarizing film layer 101 comprising the third material, thus maintaining the I3 in the polarizing film layer 101. - Ions and I5 - The polarizer 10 is in a reversible equilibrium state of ions. Therefore, when the polarizer 10 is in an alkaline sweat testing environment, the first protective film layer 102 and its second protective film layer 103 can be used as an acid-base buffer system to buffer external OH groups. - For H in polarizing film layer 101 + Ions and OH - The influence of ions, namely, maintaining the H in the polarizing film layer 101 containing the third material. + The concentrations of ions and OH- ions remain unchanged; this will not cause the polarizer 10 to turn red or blue, thus achieving the effect of improving the alkaline OH- ion concentration of external sweat. - Ionic or acidic sweat H + The effect of the polarizer 10 on edge failure.

[0062] In a specific embodiment, please refer to Figure 2 , Figure 2This is a schematic diagram of the structure of a polarizer provided in another embodiment of this application. The polarizer 10 also includes a first support film layer 104, a surface protective film layer 105, a second support film layer 106, a pressure-sensitive adhesive layer 107, and a release film 108.

[0063] The first support film layer 104 is disposed on the side surface of the first protective film layer 102 opposite to the polarizing film layer 101. The material of the first support film layer 104 is triacetyl cellulose (TAC) and / or COP material. The high strength, high wear resistance, high light transmittance and moisture and heat resistance of triacetyl cellulose and COP material are used to support and protect polyvinyl alcohol, that is, to further support and protect the polarizing film layer 101 and prevent the polarizing film layer 101 from being worn by external forces.

[0064] A surface protective film layer 105 is disposed on the side surface of the first support film layer 104 opposite to the first protective film layer 102; the material of the surface protective film layer 105 may be one of polyethylene (PE) and / or polyester resin (PET), which protects the polarizing film layer 101 and prevents surface wear.

[0065] The second support film layer 106 is disposed on the side surface of the second protective film layer 103 facing away from the polarizing film layer 101. The material of the second support film layer 106 is the same as or similar to the material of the first support film layer 104, both being triacetylcellulose (TAC) and / or COP materials. The high strength and high wear resistance of triacetylcellulose and COP materials are used to further support and protect the polyvinyl alcohol, that is, to further support and protect the polarizing film layer 101 and prevent the polarizing film layer 101 from being worn by external forces.

[0066] A pressure-sensitive adhesive layer 107 is disposed on the surface of the second support film layer 106 facing away from the second protective film layer 103. The material of the pressure-sensitive adhesive layer 107 is one of acrylic, rubber, or EVA (Ethylene-vinyl acetate copolymer), which enables the adhesive to immediately bond to any smooth surface of the adhered object. At the same time, if the bonding surface of the adhered object is damaged, the adhesive will not contaminate the surface of the adhered object. In a specific embodiment, the pressure-sensitive adhesive layer 107 is used for the screen body 11 of the display panel (see below). Figure 3 ) Stick.

[0067] Release film 108 is disposed on the side surface of pressure-sensitive adhesive layer 107 opposite to the second support film layer 106; the material of release film 108 is polyester resin (Polyethylene terephthalate, PET), used to protect pressure-sensitive adhesive layer 107; release film 108 is a peelable film. In a specific embodiment, when polarizer 10 is pasted onto screen 11 of display panel, release film 108 needs to be peeled off and then pasted.

[0068] The specific structures and functions of the first support film layer 104, surface protective film layer 105, second support film layer 106, pressure-sensitive adhesive layer 107, and release film 108 are the same as or similar to the specific structures and functions of the relevant film layers in the existing polarizer 10, and can achieve the same or similar technical effects. For details, please refer to the prior art, which will not be repeated here.

[0069] The polarizer 10 provided in this embodiment, by setting a polarizing film layer 101, has a first protective film layer 102 and a second protective film layer 103 respectively stacked on the first and second surfaces of the polarizing film layer 101. The first material of the first protective film layer 102 and the second material of the second protective film layer 103 are a conjugate acid-base pair. The first protective film layer 102 and the second protective film layer 103 act as an acid-base buffer system, maintaining a relatively stable pH value during alkaline sweat testing. This avoids the influence of external sweat on the pH value of the polarizing film layer 101, including the third material, and ensures the OH groups in the third material remain within a safe range. - Ions and H + The concentration of ions is maintained to preserve the OH groups in the polarizing film layer 101 containing the third material. - Ions and H + The reversible equilibrium state of ions solves the problem of red or blue discoloration of the polarizer 10, thereby mitigating the effect of external alkaline sweat on the edge failure of the polarizer 10. Furthermore, by setting a first support film layer 104 on the surface of the first protective film layer 102 opposite to the polarizer film layer 101, and a second support film layer 106 on the surface of the second protective film layer 103 opposite to the polarizer film layer 101, the two support film layers possess high strength, high light transmittance, and resistance to damp heat, further protecting the polarizer film layer 101. A surface protective film layer 105 is set on the surface of the first support film layer 104 opposite to the first protective film layer 102 to prevent the polarizer film layer 101 from being worn by external forces. A pressure-sensitive adhesive layer 107 is also provided for bonding the display panel body 11; a peelable release film 108 is set on one side of the pressure-sensitive adhesive layer 107 to protect it. This application demonstrates that the polarizer 10 provided in this application will not turn red or blue during alkaline sweat testing, thus improving the problem of edge failure of the polarizer 10.

[0070] This application also provides a display panel; please refer to [link / reference]. Figure 3 , Figure 3 This is a simplified structural diagram of a display panel provided in an embodiment of this application. The display panel includes a polarizer 10 and a screen 11; the polarizer 10 can be any of the polarizers provided in the above embodiments, and the polarizer 10 is specifically disposed on the light-emitting side of the screen 11 of the display panel; in specific embodiments, the screen 11 can be an LED screen or an OLED screen, and this application does not impose any restrictions.

[0071] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A polarizer, characterized in that, include: A polarizing film layer, including a first surface and a second surface disposed opposite to each other along its thickness direction; A first protective film layer is stacked on the first surface, and the first protective film layer includes a first material; A second protective film layer is laminated on the second surface, and the second protective film layer includes a second material; Wherein, the first material and the second material are conjugate acid-base pairs, so that the first protective film layer and the second protective film layer are conjugate acid-base pairs; The first protective film layer is an alkaline film, and the second protective film layer is a conjugate alkaline salt film corresponding to the alkaline film; or, the first protective film layer is a polybasic acid salt film, and the second protective film layer is a conjugate secondary acid salt film corresponding to the polybasic acid salt film; or, the first protective film layer is an acidic film, and the second protective film layer is a conjugate acid salt film corresponding to the acidic film. The weight ratio of the first protective film layer to the second protective film layer is 1:0.81 to 1:3.

74.

2. The polarizer according to claim 1, characterized in that, The difference between the pH value of the first material and the pH value of the polarizing film layer is no greater than 0.5; the difference between the pH value of the second material and the pH value of the polarizing film layer is no greater than 0.

5.

3. The polarizer according to claim 1, characterized in that, The pH value of the first material is the same as the pH value of the polarizing film layer; or the pH value of the second material is the same as the pH value of the polarizing film layer.

4. The polarizer according to claim 2, characterized in that, The polarizing film layer includes a third material, the third material having a pH value of 5 to 7.

5. The polarizer according to claim 1, characterized in that, The pH value of the acidic membrane is 2.1~6.

2.

6. The polarizer according to any one of claims 1-5, characterized in that, The thickness of the acidic membrane and / or the conjugate acid salt membrane is 10 μm to 40 μm.

7. The polarizer according to any one of claims 1-5, characterized in that, Also includes: A first support film layer is disposed on the surface of the first protective film layer that is away from the polarizing film layer; A surface protective film layer is disposed on the side of the first support film layer that is opposite to the first protective film layer; The second support film layer is disposed on the side surface of the second protective film layer that is opposite to the polarizing film layer; A pressure-sensitive adhesive layer is disposed on the surface of the second support film layer that is opposite to the second protective film layer; A release film is disposed on the surface of the pressure-sensitive adhesive layer that is opposite to the second support film layer.

8. The polarizer according to any one of claims 1-5, characterized in that, The polarizing film is a polyvinyl alcohol film, formed by dyeing with iodine ions.

9. A display panel, characterized in that, Including the polarizer as described in any one of claims 1-8.

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