POLARIZATOR, MANUFACTURING METHOD FOR IT AND DISPLAY PANEL

Abstract

A polarizer comprises a polarizing functional layer and a whisker arranged within the polarizing functional layer. After dyeing and stretching, the polarizing functional layer converts natural light into polarized light, and the whiskers are directionally arranged within the polarizing functional layer. The whisker has a longitudinal axis, and the direction of extension of the longitudinal axis has an angle of -5 degrees to 5 degrees with the absorption axis of the polarizing functional layer. The present application also provides a method for manufacturing a polarizer and a display panel incorporating a polarizer.

Description

AREA OF INVENTION

[0001] The present application relates to the field of display technology and in particular to a polarizer, a method for its manufacture and a display board. BACKGROUND

[0002] With the development of liquid crystal display (LCD) technology, LCD panels have tended to be larger and exhibit uniform contrast. However, due to the uneven distribution of liquid crystal molecules, the light transmittance of LCD panels varies at different angles, resulting in distorted display colors. The display performance is best in the central part of the LCD panel, and the color type and hue at vertical distances from the center line differ significantly from those in the central area, leading to substantial color deviations. To improve the color perspective problem in existing technology, a diffusion film and a light intensity compensation film are applied to the LCD panel to diffuse the light evenly and equalize the light intensity at specific angles.However, the improvement effect of this method is relatively limited.

[0003] To extend the viewing angle of liquid crystal display boards and adapt them to large screens, a new polarizer and its manufacturing process, as well as a display board, must be proposed that can extend the viewing angle range of liquid crystal display boards and improve the viewing angle of the color type. TECHNICAL PROBLEM

[0004] The purpose of the present application is to provide a polarizer and its manufacturing process as well as a display panel with which the viewing area of ​​a liquid crystal display panel can be extended, the viewing angle of the color type improved, and the color type and hue at a large viewing angle can be approximated to those at a positive viewing angle, thereby improving the display quality. TECHNICAL SOLUTION

[0005] To solve the aforementioned technical problems, the present application provides a polarizer comprising a polarizing functional layer and whiskers arranged within the polarizing functional layer, wherein the polarizing functional layer converts natural light into polarized light after dyeing and stretching, and the whiskers are arranged in a directed manner within the polarizing functional layer, each whisker having a longitudinal axis, and wherein the angle between the extension direction of the longitudinal axis and the absorption axis of the polarizing functional layer is -5 degrees to 5 degrees.

[0006] In one embodiment of the present application, the whisker is selected from at least one of the following: calcium carbonate whisker, barium sulfate whisker, titanium oxide whisker, aluminum oxide whisker, zirconia whisker, zinc oxide whisker, boehmite whisker, aluminum borate whisker, calcium silicate whisker, magnesium sulfate whisker, magnesium sulfate hydrate whisker and potassium titanate whisker.

[0007] In one embodiment of the present application, a material of the polarizing functional layer comprises polyvinyl alcohol.

[0008] In one embodiment of the present application, the mass fraction of the whiskers in the polarizing functional layer M1 is 0% < M1 < 80%.

[0009] In one embodiment of the present application, the whisker constitutes a mass fraction of 10% of the polarizing functional layer.

[0010] In one embodiment of the present application, an acute angle is formed between the extension direction of the longitudinal axis of the whisker and the underside of the polarizing functional layer, and the acute angle is greater than 0 degrees and less than or equal to 40 degrees.

[0011] In one embodiment of the present application, the acute angle is greater than 0 degrees and less than or equal to 20 degrees.

[0012] In one embodiment of the present application, the longitudinal axis is 5 mm to 100 mm, the whisker has a short axis and the short axis is 0.5 mm to 1 mm.

[0013] In one embodiment of the present application, the whisker comprises a main body and a modified group associated with the surface of the main body. The structural formula of the modified group is -XAR, where X is selected from SO3 or PO4H, A is selected from a single bond, a substituted or unsubstituted aromatic group with a ring number of 6-20, or an imidazoline group, and R is selected from a substituted or unsubstituted alkyl group with a carbon number of 2-20, a substituted or unsubstituted siloxane alkyl group with a carbon number of 2-20, or an alkyl alcohol amide group with a carbon number of 2-20.

[0014] In one embodiment of the present application, the general structural formula of R is, wherein R1, R2 and R3 are independently selected from F, Cl, Br, I or H and n is an integer from 1 to 19.

[0015] In one embodiment of the present application, R1, R2 and R3 are selected independently from F or H, and at least one of the residues R1, R2 and R3 is selected from F; and / or X selected from SO3; and / or A is selected from substituted or unsubstituted aromatic groups with a ring atom number of 6-20.

[0016] In one embodiment of the present application, the modified group is selected from at least one of the following structural formulas:

[0017] In one embodiment of the present application, the difference in refractive index between the whisker and the polarizing functional layer is greater than 0 and less than or equal to 0.5; and / or the refractive index of the whisker is greater than or equal to 1.5 and less than or equal to 2.0.

[0018] The present application also relates to a method for manufacturing a polarizer, comprising: Mixing polarizing materials and whiskers to form a polarizing substrate, wherein the whiskers have a longitudinal axis; and Stretching the polarizing substrate to form a polarizing functional layer such that the whiskers are arranged in a directed manner, and wherein the angle between the extension direction of the longitudinal axis and the absorption axis of the polarizing functional layer is -5 degrees to 5 degrees.

[0019] In one embodiment of the present application, the method after the step of mixing the polarizing material and the whiskers to form a polarizing substrate and before the step of stretching the polarizing substrate to form a polarizing functional layer further comprises cleaning, expanding and dyeing the polarizing substrate.

[0020] In one embodiment of the present application, the whisker is selected from at least one of the following: calcium carbonate whisker, barium sulfate whisker, titanium oxide whisker, aluminum oxide whisker, zirconia whisker, zinc oxide whisker, boehmite whisker, aluminum borate whisker, calcium silicate whisker, magnesium sulfate whisker, magnesium sulfate hydrate whisker and potassium titanate whisker.

[0021] In one embodiment of the present application, a material of the polarizing functional layer comprises polyvinyl alcohol.

[0022] In one embodiment of the present application, the whisker constitutes a mass fraction of 10% of the polarizing functional layer.

[0023] The present application also relates to a display board. The display board comprises a board body and a polarizer attached to the board body. The polarizer comprises a polarizing functional layer and a whisker arranged within the polarizing functional layer. After dyeing and stretching, the polarizing functional layer converts natural light into polarized light, and the whiskers are directionally arranged within the polarizing functional layer. The whisker has a longitudinal axis, and the angle between the direction of extension of the longitudinal axis and the absorption axis of the polarizing functional layer is -5 degrees to 5 degrees.

[0024] In one embodiment of the present application, the whisker is selected from at least one of the following: calcium carbonate whisker, barium sulfate whisker, titanium oxide whisker, aluminum oxide whisker, zirconia whisker, zinc oxide whisker, boehmite whisker, aluminum borate whisker, calcium silicate whisker, magnesium sulfate whisker, magnesium sulfate hydrate whisker and potassium titanate whisker.

[0025] One material of the polarizing functional layer includes polyvinyl alcohol. Beneficial effects

[0026] During the manufacturing process, the stretching of the whisker-containing polarizing substrate imparts a polarizing effect to the substrate, while the disordered arrangement of the whiskers is transformed into an ordered arrangement. The resulting polarizer exhibits an angle between -5 degrees and 5 degrees between the longitudinal axis of the whiskers and the absorption axis of the polarizing functional layer. The whisker arrangement within the polarizer causes Mie scattering of light passing through the polarizer in the direction perpendicular to the absorption axis. When the polarizer is applied to the display film layer, the viewing angle of the display panel widens in the direction perpendicular to the absorption axis, thus expanding the viewing area.At the same time, the color angle is improved, so that the color type and hue at a wide viewing angle are closer to those at a positive viewing angle, thus improving the display quality. DESCRIPTION OF THE IMAGE Fig. Figure 1 is a schematic diagram of a structure of a polarizer according to an embodiment of the present application. Fig. Figure 2 is a schematic diagram of a top-view structure of the polarizer according to an embodiment of the present application. Fig. Figure 3 is a schematic diagram of the relationship between Mie scattering intensity and scale number. Fig. Figure 4 is a schematic diagram of the arrangement of whiskers in the polarizing functional layer of the polarizer according to an embodiment of the present application. Fig. Figure 5 shows the modification mechanism of alkylbenzenesulfonic acid-based modifiers. Fig. Figure 6 is a structural schematic diagram of a surface-modified calcium carbonate whisker in the polarizer according to an embodiment of the present application. Fig. Figure 7 is another structural schematic diagram of the surface-modified calcium carbonate whiskers in the polarizer according to an embodiment of the present application. Fig. Figure 8 shows the modification mechanism of alkyl phosphate ester modifiers. Fig. Figure 9 is a flowchart of a manufacturing process for the polarizer according to an embodiment of the present application. Fig. Figure 10 is a schematic diagram of the process of step S1 according to an embodiment of the present application. Fig. Figure 11 is a schematic diagram of the operation of steps P1 to P5 according to an embodiment of the present application. Fig. Figure 12 is a structural schematic diagram of a display board according to an embodiment of the present application. Warning signs:

[0027] Polarizer 10; Polarizing functional layer 11; Bottom side 11a; Top side 11b; Whisker 12; Diffuser layer 13; Adhesive layer 13J; Protective film 14; Polarizing substrate J1; Absorption axis Z; Display panel 100; Panel body 20; Thickness of the polarizing functional layer H; Length of the whisker L. Description of the embodiments

[0028] The technical solutions in the embodiment of the present application are described clearly and completely below, in combination with the accompanying drawings. Of course, the described embodiment is only a subset of the embodiments of the present application and not all embodiments. Based on the embodiments in the present application, all other embodiments that could be obtained by a person skilled in the art without any creative effort fall within the scope of protection of the present application.

[0029] It should be noted that when describing the present application, it must be clear that the orientation or positional relationship associated with the terms "top", "bottom", "front", "back", "left", "right", "inside", "outside", etc., is based on the orientation or positional relationship shown in the drawings and serves only to facilitate and simplify the description of the present application, and not to indicate or suggest that the device or element in question must have a particular orientation or be designed and operated in a particular orientation. It therefore cannot be understood as a limitation of the present application.

[0030] See the Fig. An embodiment of the present application provides a polarizer 10. The polarizer 10 comprises a polarizing functional layer 11 and a whisker 12 arranged within the polarizing functional layer 11. The polarizing functional layer 11 is used, after dyeing and stretching, to convert natural light into polarized light. The whisker 12 is aligned within the polarizing functional layer 11. The polarizing functional layer 11 has an absorption axis Z. The whisker 12 has a longitudinal axis, and the angle between the direction of extension of the longitudinal axis and the absorption axis Z of the polarizing functional layer is between -5 degrees and 5 degrees. In particular, the angle between the direction of extension of the longitudinal axis of the whisker 12 and the absorption axis Z of the polarizing functional layer can be -5 degrees, -3 degrees, -1 degree, 0 degrees, 1 degree, 3 degrees, 5 degrees, etc.

[0031] In the present application, the angle formed by a counterclockwise rotation of the absorption axis Z of the polarizing functional layer 11, the center of rotation of which is a specific point on the absorption axis Z, is a negative angle, and the angle formed by a clockwise rotation, the center of rotation of which is this point, is a positive angle. If the angle between the direction of extension of the longitudinal axis of the whisker 12 and the direction of extension of the absorption axis Z of the polarizing functional layer is -5 degrees, the absorption axis Z of the polarizing functional layer 11 rotates 5 degrees counterclockwise about a specific point on the absorption axis Z as its center point, in order to form a straight line parallel to the longitudinal axis of the whisker 12.If the angle between the extension direction of the longitudinal axis of the whisker 12 and the extension direction of the absorption axis Z of the polarizing functional layer is 5 degrees, the absorption axis Z of the polarizing functional layer 11 rotates 5 degrees clockwise around a certain point on the absorption axis Z as its center point to form a straight line parallel to the longitudinal axis of the whisker 12.

[0032] During the manufacturing process of this embodiment, the polarizing substrate J1, including the whiskers 12, is stretched to achieve a polarizing effect. Simultaneously, the whiskers 12 in the polarizer 10 are changed from a disordered arrangement to an ordered arrangement. The polarizer 10 formed in this way has an angle between -5 degrees and 5 degrees between the direction of extension of the longitudinal axis of the whiskers 12 and the direction of extension of the absorption axis Z of the polarizing functional layer. The arrangement of the whiskers 12 in the polarizer 10 causes Mie scattering of the light passing through the polarizer 10 in the direction perpendicular to the absorption axis Z. When the polarizer 10 is applied to the display film layer, the viewing angle of the display panel 100 widens in the direction perpendicular to the absorption axis Z; that is, the viewing area widens.At the same time, the color perspective is improved, so that the color type and hue at a wide viewing angle are closer to those at a positive viewing angle, which improves the display quality.

[0033] In this embodiment, the longitudinal axis of the whisker 12 is 5 mm to 100 mm and the short axis of the whisker 12 is 0.1 mm to 10 mm. In particular, the longitudinal axis of the whisker 12 can be 5 mm, 10 mm, 50 mm, 80 mm or 100 mm, while the short axis of the whisker 12 can be 0.1 mm, 0.5 mm, 1 mm, 5 mm, 6 mm or 10 mm.

[0034] It should be noted that Mie scattering refers to the scattering of light, where light striking particles with a diameter approximately equal to or greater than the wavelength of the light is scattered primarily in its original direction of propagation. The change in the intensity of the scattering is a function of the ratio of particle radius to radiation wavelength, with dimensionless scale numbers α serving as the distinguishing criterion. The formula is α = 2πr / λ, where α is the dimensionless scale number, r is the particle radius, and λ is the wavelength of the light.

[0035] See Fig. Figure 3 is a schematic representation of the relationship between Mie scattering intensity and scale number, where the abscissa represents the scale number α and the ordinate the scattering intensity I. For example, if whisker 12 is needle-shaped, the short axis of whisker 12 is its diameter. When the scale number α is 1, the Mie scattering intensity I reaches its maximum. When the scale number α is greater than 1, the scattering intensity I tends to stabilize at around 1. This is because the light emitted by the display screen must be visible to the human eye; that is, the visible light emitted by the display screen has a wavelength of 380 nm to 780 nm. For the scale number α to be greater than 1, the diameter of whisker 12 should be greater than 0.121 mm to 0.248 mm. Therefore, the short axis of whisker 12 is between 0.1 mm and 10 mm and the intensity of Mie scattering is high, which means that the intensity of light scattering is high.Therefore, when the polarizer 10 is attached to the display film layer, the contrast of the large viewing angle range is improved.

[0036] Furthermore, the scattering that occurs when light strikes particles whose diameter is approximately equal to or greater than the wavelength of the light is called Mie scattering. For Mie scattering to occur, Whisker 12 must be larger than the wavelength of light. Therefore, if the short axis of Whisker 12 is less than 390 nm to 780 nm, the length of its long axis must increase, which can range from 5 mm to 100 mm.

[0037] The short axis of the Whisker 12 is selected between 0.5 mm and 1 mm, and the long axis between 5 mm and 100 mm. While ensuring the occurrence of Mie scattering, this can reduce the light loss caused by the excessive surface area of ​​the Whisker 12.

[0038] Optionally, the mass fraction of the whiskers 12 in the polarizing functional layer 11 M1 is, where 0% <M1<80%.

[0039] The mass fraction of the solidified whiskers 12 in the polarizing functional layer 11 is M1, where 0% <M1<80% gilt, was den Lichtstreuungswinkel erhöhen kann. Optional kann M1 8%, 10%, 15%, 20%, 25%, 30%, 50% oder 60% usw. betragen.

[0040] In this embodiment, the whisker 12 arranged within the polarizing functional layer 11 constitutes 10% of the mass fraction of the polarizing functional layer 11. This polarizing plate 10 can be arranged on the panel body 20 to extend the viewing angle of the display panel from 100 to over 160 degrees.

[0041] If the proportion of whiskers 12 in the polarizing functional layer 11 is relatively small, the scattering effect is weak, which can improve the contrast of the side view of the display panel 100. However, there is still a gap between the contrast of the side view and the positive view. If the proportion of whiskers 12 in the polarizing functional layer 11 is large, the scattering effect is strong and more light is scattered towards the side viewing angle, leading to a reduction in the light transmittance of the front of the polarizing plate 10, which results in lower brightness of the screen at the positive viewing angle.

[0042] In this embodiment, the material of the polarizing functional layer comprises 11 polyvinyl alcohol.

[0043] Understandably, polyvinyl alcohol (PVA) film, after stretching, exhibits a polarizing effect that can convert natural light into polarized light for emission. The insertion of whiskers 12 into the polyvinyl alcohol film and the formation of a polarizing functional layer 11 after stretching can have both polarizing and scattering effects, which is advantageous for reducing the film thickness.

[0044] Optionally, the polarizer 10 can also include a protective film 14 attached to the surface of the polarizing functional layer 11. The protective film 14 can consist of triacetylcellulose (TAC) film to protect the polarizing functional layer 11, but the present application is not limited to this.

[0045] In this embodiment, whisker 12 is selected from one of calcium carbonate whiskers, barium sulfate whiskers, titanium oxide whiskers and aluminum oxide whiskers.

[0046] Adding cost-effective whiskers 12 to the polarizing functional layer 11 can effectively reduce the production costs of the polarizer 10. Materials such as calcium carbonate, barium sulfate, titanium oxide, and aluminum oxide are inexpensive and cost-effective. Directly adding whiskers 12, selected from calcium carbonate, barium sulfate, titanium oxide, aluminum oxide, etc., to the polarizing functional layer 11 reduces costs by more than 50% compared to applying a light intensity compensation film or other film layers to the polarizer 10. It is understood that whiskers 12 could also be selected from other materials, such as zirconium oxide, zinc oxide, boehmite, aluminum borate, calcium silicate, magnesium sulfate, magnesium sulfate hydrate, potassium titanate, etc. However, the present application is not limited to these.

[0047] Whisker 12 can be cylindrical or conical, e.g., cylindrical, elliptical, triangular, quadriprismatic, multiprismatic, triangular, quadrigram-like, or multiprismatic. The extension direction of the whisker's longitudinal axis represents the vertical direction of the column or cone, and the length L represents the vertical length of the column or cone, also known as the longitudinal axis length.

[0048] See Fig. 4. The thickness of the polarizing functional layer 11 is H, the length of the whisker 12 is L, and the direction of the longitudinal axis extension of the whisker 12 forms an acute angle β with the base surface 11a in the range of - arcsin(H / L) to arcsin(H / L). The inventor has discovered through research that acute angles β have an influence on the optical performance of the polarizer 10.

[0049] The polarizing functional layer 11 comprises a lower surface 11a and an upper surface 11b, which face each other in the direction of film stacking. Optionally, the lower surface 11a is located on the entry side of the upper surface 11b, or the lower surface 11a is the surface that is formed first when the polarizing functional layer 11 is formed. If the direction of the longitudinal axis extension of the whisker 12 forms an acute angle β with the lower surface 11a, and the size of the whisker 12 is too large, this leads to the whisker 12 protruding from the polarizing functional layer 11 due to the limited thickness of the film, impairing the smoothness of the film layer. Furthermore, an excessive length of the whisker 12 can easily lead to excessive whisker accumulation and detract from its appearance.

[0050] In particular, when whiskers 12 are added to polarizer 10, it is advantageous if the acute angle β between the direction of extension of the longitudinal axis of whisker 12 and the base surface 11a is greater than 0 degrees and less than or equal to 40 degrees, in order to improve brightness and color perspective. This can be achieved, in particular, by the fixed length of whisker 12, which results in a fixed amount of light scattered by whisker 12. The amount of light scattered by whisker 12 can be divided into components of whisker 12 in the direction parallel to the base surface 11a of the polarizing functional layer 11 (referred to as left and right components) and components in the direction perpendicular to the base surface 11a of the polarizing functional layer 11 (referred to as upper and lower components). If the left and right components are large, the upper and lower components are small.If the angle between whisker 12 and polarizing functional layer 11 is smaller, the left and right components are larger (i.e., the projection of whisker 12 onto the polarizing functional layer 11 is larger), the scattering to the left and right is stronger, and the performance of the left and right angle is better, and vice versa.

[0051] Furthermore, the experimental results show that the acute angle β between the direction of extension of the longitudinal axis of whisker 12 and the underside 11a is less than or equal to 20 degrees. The brightness and color perspectives were further improved.

[0052] Optionally, whisker 12 comprises a main body and a modified group associated with the surface of the main body. The structural formula of the modified group is -XAR, where X is selected from SO3 or PO4H, A is selected from a single bond, a substituted or unsubstituted aromatic group with a ring number of 6-20, or an imidazoline group, and R is selected from a substituted or unsubstituted alkyl group with a carbon number of 2-20, a substituted or unsubstituted siloxane alkyl group with a carbon number of 2-20, or an alkyl alcohol amide group with a carbon number of 2-20. Unless otherwise specified, the term "substituted or unsubstituted" as used in the embodiments of the present application refers to the hydrogen at the carbon atom that is replaced or unsubstituted by F, Cl, Br, or I.

[0053] Modifying whisker 12 with the aforementioned modification groups not only improves its dispersibility in the resin, but also protects the whisker particles and enhances their toughness by forming sulfonic acid or phosphate ester shell layers on their surface, thus preventing whisker 12 fracture. Furthermore, an organic layer is bonded to the surface of the modified whisker 12, inhibiting the growth of its short axis while preserving the growth of its long axis. This increases the length-to-width ratio of whisker 12, further reducing the likelihood of whisker 12 fracture during stirring and improving the color appearance of the polarizing functional layer 11, thereby enhancing performance.

[0054] In some embodiments, the R group can be a substituted or unsubstituted alkyl chain, which can inhibit the growth of the short axis of whisker particles and increase the length-to-width ratio of whisker 12. In particular, the general formula for the structure of R is given by [formula missing in original text], where R1, R2, and R3 are independently selected from F, Cl, Br, I, or H, and n is an integer from 1 to 19. Modifying the end of the long chain with halogen atoms can improve the stability of whisker 12.

[0055] Optionally, n can take the values ​​2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18.

[0056] In some embodiments, R1, R2, and R3 are selected independently from F or H, and at least one of the R1, R2, and R3 groups is selected from F. On the one hand, the FC bond has high energy and is difficult to break. On the other hand, F atoms have a shielding effect on the CC bond.

[0057] R1, R2, and R3 are all selected from fluorine, with the end group of R being perfluorinated. The radius of the fluorine atom is larger than that of the hydrogen atom, which effectively shields and protects the perfluorinated C-C bond, thus reducing the likelihood of its rupture. Furthermore, while the C-C bond is protected, the radius of the fluorine atom is not large enough to induce steric strain in the perfluorocarbon chain, resulting in greater stability of the fluorocarbon chain.

[0058] In some embodiments, A is selected from substituted or unsubstituted aromatic groups with a ring number of 6–20, such as phenyl, biphenyl, or naphthyl. The steric hindrance of the benzene ring is relatively high, and an organic protective layer containing the benzene ring is present on the surface of whisker 12. During the mixing and stirring process of whisker 12 and resin, this organic protective layer buffers the mutual forces and thus prevents breakage of whisker 12 during the stirring process.

[0059] Optionally, X is a sulfonic acid group. During the stirring process, the sulfonic acid shell formed on the surface of whisker 12 can protect whisker 12 and prevent its breakage, thereby improving the toughness of whisker 12.

[0060] The modified group selects at least one of the following structural formulas:

[0061] Furthermore, the modified group selects at least one of the following structural formulas:

[0062] The modified groups mentioned above serve only as examples, and the modified groups in the present application are not limited to them. The modifier for modifying Whisker 12 can be selected according to the modification groups listed above. The modifier can be at least one of the following: alkyl sulfonates, fluorinated alkyl sulfonates, aromatic alkyl phosphates, fluorinated aromatic alkyl phosphates, alkyl phosphates, alkyl phosphates, aromatic alkyl phosphates, aromatic alkyl phosphates, alkylamide phosphates, alkylamide phosphates, imidazoline phosphates, imidazoline phosphates, siloxane phosphates, high-polymer phosphates, and high-polymer phosphates.

[0063] In particular, the modifier can be sodium dodecylsulfonate, sodium perfluoro-1-dodecylsulfonate, sodium 4-dodecylbenzenesulfonate, sodium 3-decylbenzenesulfonate, sodium 1-decanesulfonate, sodium perfluoro-1-decanesulfonate, sodium 1-butanesulfonate, sodium perfluoro-1-butanesulfonate, sodium 1-octanesulfonate, sodium perfluoro-1-octanesulfonate, sodium nonanesulfonate, sodium perfluoro-1-nonanesulfonate, sodium pentanesulfonate, sodium perfluoro-1-pentanesulfonate and sodium 1-heptanesulfonate. At least one of sodium perfluoro-1-heptanesulfonate, sodium perfluoro-1-hexadecanesulfonate, sodium perfluoro-1-hexadecanesulfonate, sodium perfluoro-1-octadecanesulfonate, sodium 4-ethylbenzenesulfonate, sodium sunflower benzenesulfonate, p-ethylbenzenesulfonate sodium, 4-octylbenzenesulfonate sodium and butylnaphthalenesulfonate sodium.

[0064] The present application also includes a modification method for Whisker 12, including steps B1, B2 and B3.

[0065] In step B1, the main body of the whisker is dispersed in the dispersion to form a suspension of the main body of the whisker.

[0066] In step B2, a modifier is added to the suspension of the main body of the whisker while stirring in order to modify the whisker 12 and obtain a mixture.

[0067] In step B 3, impurities are removed from the mixture to obtain whisker 12.

[0068] The dispersion may be a weakly alkaline or alkaline solvent and the dispersion comprises at least one of the following: sodium hydroxide, deionized water, methanol, ethylene glycol, glycerin, n-butanol, sec-butanol and ammonia water.

[0069] In step B1, the mass fraction of whisker 12 in the suspension is 5% to 20%, with 5%, 6%, 7%, 8%, 9%, 10%, 12%, 13%, 15%, 16%, 17%, 18%, 19%, and 20% being possible. The ratio of modifier to dispersion can be 0.5:1 to 1:1, in particular 0.5:1, 0.8:1, 0.9:1, or 1:1.

[0070] In steps B1 and B2, the temperature of the control system is between 65°C and 75°C, i.e., 65°C, 68°C, 70°C, 72°C, or 75°C. In step B20, the stirring speed can be between 700 rpm and 900 rpm, i.e., 700 rpm, 720 rpm, 740 rpm, 750 rpm, 760 rpm, 780 rpm, 800 rpm, 810 rpm, 820 rpm, 850 rpm, 860 rpm, 880 rpm, or 900 rpm. The change time (response time) can be 40-80 min, i.e. 40 min, 50 min, 55 min, 60 min, 65 min, 70 min or 80 min.

[0071] The treatment steps for removing impurities include: successive filtering of the mixture, cleaning with water, filtering, cleaning with alcohol, followed by vacuum drying and grinding to obtain modified whiskers 12.

[0072] In the modification method described above, stirring brings the modifier and the whisker body into complete contact within the dispersion. During this process, the -OH in the dispersion dissolves and exposes the atoms on the surface of the whisker body. At this point, the functional groups in the modifier form an interaction force with the exposed surface atoms, causing them to adsorb onto the surface of the whisker body. By adjusting the system temperature, the modifier concentration, and the stirring speed, the interaction force is modified, thus altering the morphology of whisker 12.

[0073] In particular, the modification of calcium carbonate whiskers using alkylbenzenesulfonic acid and alkyl phosphate ester modifiers is illustrated as examples.

[0074] The modification mechanism of alkylbenzenesulfonic acid-based modifiers is described in Fig. Figure 5 illustrates this. Compared to conventional modifiers, alkylbenzenesulfonic acid-based modifiers can effectively improve the toughness of calcium carbonate whiskers. During stirring, a shell layer based on benzenesulfonic acid forms on the surface of the whiskers 12. This shell protects the calcium carbonate whiskers and prevents breakage, thus achieving a toughening effect. Furthermore, the presence of an organic layer on the surface of the calcium carbonate whiskers inhibits the growth of the short axis of the whiskers while leaving the growth of the long axis unaffected. Therefore, it increases the length-to-width ratio of the calcium carbonate whiskers, preventing breakage during stirring. Additionally, long chains can also improve the dispersion performance of the calcium carbonate whiskers in the resin.

[0075] Furthermore, the stability of calcium carbonate whiskers can be improved by completely replacing the hydrogen atom at the end group of alkylsulfonic acid modifiers or alkylbenzenesulfonic acid modifiers with fluorine atoms. The modified groups on the surface of calcium carbonate whiskers are shown in Figures 6 and 7.

[0076] On the one hand, the FC bond has high energy and is difficult to break; on the other hand, the F atom has a shielding effect on the CC bond, which can reduce the probability of CC breaking.

[0077] The modification mechanism of alkyl phosphate ester modifiers is similar to that of alkylsulfonic acid-based modifiers, as described in Fig. 8 shown.

[0078] It should be noted that the refractive index of Whisker 12 does not change significantly after the modification, and the difference in refractive index between Whisker 12 before and after the modification can be disregarded. The refractive index of Whisker 12 is 1.5–2.0. Optionally, the refractive index of Whisker 12 can be 1.5, 1.55, 1.60, 1.65, 1.67, 1.68, 1.70, 1.75, 1.80, 1.85, 1.90, 1.95, or 2.0.

[0079] The difference in refractive index between whisker 12 and polarizing functional layer 11 is greater than 0 and less than or equal to 0.5. Specifically, the refractive index of whisker 12 is 0.18, 0.23, 0.28, or 0.43 higher than that of the polarizing functional layer 11. Within this range, the effect of expanding the color perspective of the polarizing functional layer 11 is good.

[0080] See Fig. Figure 9, which is a flowchart of the manufacturing process for the polarizer 10 provided in an embodiment of the present application. Accordingly, an embodiment of the present application also provides a manufacturing process for a polarizer 10 comprising the following steps: Step S1: Mixing the polarization material and the whisker 12 to form the polarization substrate J1. Whisker 12 has a longitudinal axis. Step S2, stretching of the polarizing substrate J1 to form the polarizing functional layer 11, such that the angle between the extension direction of the longitudinal axis and the absorption axis Z of the polarizing functional layer is -5 degrees to 5 degrees.

[0081] The manufacturing process of the polarizer 10, provided in one embodiment of the present application, comprises mixing whiskers 12 into the polarizing material to form a polarizing substrate J1, and then stretching the polarizing substrate J1, including the whiskers 12, by a stretching process such that the polarizing substrate J1 has a polarizing effect. Simultaneously, the whiskers 12 in the polarizer 10 change their disordered arrangement to an ordered arrangement. The polarizer 10 formed in this way can cause the light passing through the polarizer 10 to undergo Mie scattering in the direction perpendicular to the absorption axis Z. When the polarizer 10 is attached to the display film layer, the viewing angle of the display panel 100 widens in the direction perpendicular to the absorption axis Z, and the contrast of the display panel 100 increases at the wide viewing angle.

[0082] The manufacturing process of the polarizer 10 in this embodiment is described below.

[0083] See the Fig. In step S1, the polarizing material and whisker 12 are mixed to form the polarizing substrate J1. Whisker 12 has a longitudinal axis.

[0084] In this embodiment, the longitudinal axis of the whisker mixed into the polarization substrate J1 is 5 to 100 mm and the short axis is 0.1 to 10 mm.

[0085] When forming a polarization substrate J1, whiskers 12 are mixed into the polarization material, with the longitudinal axis of the whiskers 12 being between 5 and 100 mm and the short axis between 0.1 and 10 mm. The mixed material is then shaped and solidified to form a polarization substrate J1.

[0086] Optionally, the proportion of whiskers 12 in the polarizing material M3 is 0% <M3<30% ist und M3 5%, 6%, 7%, 8%, 10%, 15% oder 20% betragen kann.

[0087] In this embodiment, 7% by weight of whiskers 12 are mixed into the polarizing material to form a polarizing substrate J1. The mass fraction of whiskers 12 in the polarizer 10 formed by this polarizing substrate J1 is approximately 10% by weight, which can extend the viewing angle of the display screen to over 160 degrees.

[0088] If the proportion of whiskers 12 added to the polarizing material is relatively small, the scattering effect of the resulting polarizing plate 10 is weak, which can improve the contrast of the display panel 100 at the side viewing angle. However, there is still a difference between the contrast of the side viewing angle and the contrast of the front viewing angle. If a large proportion of whiskers 12 is added to the polarizing material, the resulting polarizer 10 has a strong scattering effect, with more light being scattered towards the side viewing angle. This leads to a reduction in the light transmittance of the front of the polarizer 10, resulting in lower screen brightness at the positive viewing angle.

[0089] Optionally, the polarizing material can be polyvinyl alcohol (PVA), and whisker 12 is selected from one of the following materials: calcium carbonate whisker, barium sulfate whisker, titanium oxide whisker, and aluminum oxide whisker, but the present application is not limited to these. Whisker 12 can also be selected from other materials, such as zirconium dioxide, zinc oxide, boehmite, aluminum borate, calcium silicate, magnesium sulfate, magnesium sulfate hydrate, potassium titanate, etc.

[0090] Optionally, in this embodiment, the manufacturing process of the polarizer 10 can also include step P1 after the formation of the polarization substrate J1 in step S1.

[0091] Step P1: Cleaning, expanding and staining the polarization substrate J1. The polarization substrate J1 is cleaned of organic impurities and stained to avoid the effects of impurities on the performance of the polarization functional layer 11.

[0092] The process then proceeds to step S2. That is, from step S1, the process proceeds to step P1 and then to step S2, or from step S1, it proceeds directly to step S2.

[0093] Step S2: Stretching the polarizing substrate J1 to form the polarizing functional layer 11, such that the angle between the extension direction of the longitudinal axis of the whisker 12 and the extension direction of the absorption axis Z of the polarizing functional layer is -5 degrees to 5 degrees.

[0094] In particular, a roller is used to stretch the polarizing substrate J1 such that the angle between the extension direction of the longitudinal axis of the whisker 12 and the extension direction of the absorption axis Z of the polarizing functional layer is -5 degrees to 5 degrees. The stretching ratio is greater than 0 and less than 100, which can be 5-fold, 10-fold, 15-fold, or 20-fold.

[0095] The manufacturing process is simplified by incorporating whiskers 12 into the polarizing material and stretching the polarizing substrate J1 while aligning the whiskers 12. The resulting polarizing functional layer 11, formed after dyeing and stretching, has a polarizing effect that can convert natural light into polarized light.

[0096] Optionally, the manufacturing process of the polarizer 10 in this embodiment also includes steps P2, P3, P4 and P5. Steps P2 to P5 follow step S2 sequentially.

[0097] In step P2, the polarizing functional layer 11 is dried.

[0098] In step P3, a protective film 14 is applied to the surface of the polarizing functional layer 11.

[0099] In step P4, the polarizing functional layer 11 attached to the protective film 14 is dried to form a polarizer 10.

[0100] In step P5, the polarizer 10 is rolled up.

[0101] Preparation of polarizer 10 continues, proceeding from step S2 to step P2.

[0102] In step P2, the polarizing functional layer 11 is dried.

[0103] In this embodiment, the percentage of the mass of the whiskers 12 in the polarizing functional layer 11 to the total mass of the polarizing functional layer 11 after drying of the polarizing functional layer 11 is M1, where 0% <M1<80% gilt. Beispielsweise beträgt M1 8%, 10%, 15%, 20%, 25%, 30%, 50% oder 60%.

[0104] By drying the polarizing functional layer 11, water vapor in the polarizing functional layer 11 can be removed, thereby increasing the mass fraction of the whiskers 12 in the polarizing functional layer 11.

[0105] The next step is P3.

[0106] In step P3, a protective film 14 is applied to the surface of the polarizing functional layer 11.

[0107] In particular, the protective film 14 can consist of triacetylcellulose (TAC) film to protect the polarizing functional layer 11.

[0108] Then proceed to step P4.

[0109] In step P4, the polarizing functional layer 11 attached to the protective film 14 is dried to form a polarizer 10. The water vapor is removed from the protective film 14.

[0110] Then proceed to step P5.

[0111] In step P5, the polarizer 10 is rolled up for later attachment.

[0112] At this point, the manufacture of the polarizer 10 in the embodiment of the present application is completed.

[0113] See Fig.12. The present application also provides a display panel 100 comprising a panel body 20 and one of the aforementioned polarizing films 10 attached to the panel body 20, or a polarizer 10 manufactured by a manufacturing process for one of the aforementioned polarizing films 10. The polarizer 10 comprises a polarizing functional layer 11 and a whisker 12 arranged within the polarizing functional layer 11. The polarizing functional layer 11 is used, after dyeing and stretching, to convert natural light into polarized light. Whiskers 12 are directionally arranged within the polarizing functional layer 11. The polarizing functional layer 11 has an absorption axis Z. Whiskers 12 have a longitudinal axis, and the angle between the direction of extension of the longitudinal axis and the absorption axis Z of the polarizing functional layer is -5 degrees to 5 degrees.Whisker 12 is selected from at least one of the following: calcium carbonate whisker, barium sulfate whisker, titanium oxide whisker, aluminum oxide whisker, zirconia whisker, zinc oxide whisker, boehmite whisker, aluminum borate whisker, calcium silicate whisker, magnesium sulfate whisker, magnesium sulfate hydrate whisker, and potassium titanate whisker. The material of the polarizing functional layer 11 comprises polyvinyl alcohol.

[0114] The above provides a detailed introduction to a polarizer 10 and its manufacturing process, as well as to a display panel 100 provided in the embodiment of the present application.

[0115] The polarizer provided in the embodiment of the present application comprises a polarizing functional layer and a whisker arranged within the polarizing functional layer. The polarizing functional layer is used to convert natural light into polarized light. Whiskers are directionally arranged within the polarizing functional layer and have a longitudinal axis. The angle between the direction of extension of the longitudinal axis and the absorption axis of the polarizing functional layer is -5 degrees to 5 degrees. The embodiment of the present application also provides a manufacturing method for a polarizer and a display panel containing a polarizer.

[0116] The embodiments of the present application propose stretching the polarizing substrate containing whiskers during the manufacturing process. The polarizing substrate has a polarizing effect while the disordered arrangement of the whiskers is transformed into an ordered arrangement. The polarizer formed in this way exhibits an angle between -5 degrees and 5 degrees between the direction of extension of the whisker's longitudinal axis and the direction of extension of the absorption axis of the polarizing functional layer. The arrangement of the whiskers in the polarizer causes Mie scattering of the light passing through the polarizer in the direction perpendicular to the absorption axis. When the polarizer is attached to the display film layer, the viewing angle of the display panel widens in the direction perpendicular to the absorption axis, thus increasing the viewing area.At the same time, the color angle is improved, so that the color type and hue at a wide viewing angle are closer to those at a positive viewing angle, thus improving the display quality.

[0117] The above are embodiments of the present application which do not limit the scope of the present application. All modifications, equivalent replacements or improvements in the sense and principles of the embodiment described above should be covered by the protected scope of the application.

Claims

[1] A polarizer, characterized by , that the polarizer comprises a polarizing functional layer and whiskers arranged within the polarizing functional layer, wherein the polarizing functional layer converts natural light into polarized light after dyeing and stretching, and the whiskers are arranged in a directed manner within the polarizing functional layer, each of the whiskers having a longitudinal axis, and an extension direction of the longitudinal axis having an angle of -5 degrees to 5 degrees with an absorption axis of the polarizing functional layer. [2] Polarizer according to claim 1, characterized by , that the whisker is selected from at least one of the following: calcium carbonate whisker, barium sulfate whisker, titanium oxide whisker, aluminum oxide whisker, zirconia whisker, zinc oxide whisker, boehmite whisker, aluminum borate whisker, calcium silicate whisker, magnesium sulfate whisker, magnesium sulfate hydrate whisker and potassium titanate whisker. [3] Polarizer according to claim 1, characterized by , that the material of the polarizing functional layer comprises polyvinyl alcohol. [4] Polarizer according to claim 1, characterized by , that the mass fraction of the whiskers in the polarizing functional layer M1 is 0% < M1 < 80%. [5] Polarizer according to claim 4, characterized by that the whisker accounts for 10% of the mass of the polarizing functional layer. [6] Polarizer according to claim 1, characterized by , that an acute angle is formed between the direction of extension of the longitudinal axis of the whisker and the underside of the polarizing functional layer, and that the acute angle is greater than 0 degrees and less than or equal to 40 degrees. [7] Polarizer according to claim 6, characterized by that the acute angle is greater than 0 degrees and less than or equal to 20 degrees. [8] Polarizer according to claim 1, characterized by, that the longitudinal axis is 5 mm to 100 mm, the whisker has a short axis and the short axis is 0.5 mm to 1 mm. [9] Polarizer according to claim 1, characterized by , that the whisker comprises a main body and a modified group connected to the surface of the main body, wherein the structural formula of the modified group is -XAR, where X is selected from SO3 or PO4H, A is selected from a single bond, a substituted or unsubstituted aromatic group with a ring number of 6-20 or an imidazoline group, and R is selected from a substituted or unsubstituted alkyl group with a carbon number of 2-20 and a substituted or unsubstituted siloxane alkyl group with a carbon number of 2-20, alkyl alcohol amide groups with a carbon number of 2-20. [10] The polarizer according to claim 9, characterized by, that the general structural formula of Rist, where R1, R2 and R3 are independently selected from F, Cl, Br, I or H and n is an integer from 1 to 19. [11] Polarizer according to claim 10, characterized by that R1, R2 and R3 are independently selected from F or H, and at least one of R1, R2 and R3 is selected from F; and / or X selected from SO3; and / or A is selected from substituted or unsubstituted aromatic groups with a ring atom number of 6-20. [12] Polarizer according to claim 9, characterized by , that the modified group is selected from at least one of the following structural formulas: [13] Polarizer according to claim 9, characterized by, that the difference in refractive index between the whisker and the polarizing functional layer is greater than 0 and less than or equal to 0.5; and / or the refractive index of the whisker is greater than or equal to 1.5 and less than or equal to 2.

0. [14] Method for producing a polarizer, comprising: Mixing polarizing materials and whiskers to form a polarizing substrate, wherein the whiskers have a longitudinal axis; and Stretching the polarizing substrate to form a polarizing functional layer such that the whiskers are arranged in a directed manner and the angle between the extension direction of the longitudinal axis and the absorption axis of the polarizing functional layer is -5 degrees to 5 degrees. [15] Method according to claim 14, characterized by, that after the step of mixing the polarizing material and the whiskers to form a polarizing substrate and before the step of stretching the polarizing substrate to form a polarizing functional layer, it further includes cleaning, expanding and dyeing the polarizing substrate. [16] Method according to claim 14, characterized by , that the whisker is selected from at least one of the following: calcium carbonate whisker, barium sulfate whisker, titanium oxide whisker, aluminum oxide whisker, zirconia whisker, zinc oxide whisker, boehmite whisker, aluminum borate whisker, calcium silicate whisker, magnesium sulfate whisker, magnesium sulfate hydrate whisker and potassium titanate whisker. [17] Method according to claim 14, characterized by , that the material of the polarizing functional layer comprises polyvinyl alcohol. [18] Method according to claim 14, characterized bythat the whisker accounts for 10% of the mass of the polarizing functional layer. [19] A scoreboard, characterized by , that the display panel comprises a panel body and a polarizer attached to the panel body, wherein the polarizer comprises a polarizing functional layer and whiskers arranged within the polarizing functional layer, wherein the polarizing functional layer converts natural light into polarized light after coloring and stretching, and the whiskers are arranged directionally within the polarizing functional layer, each of the whiskers having a longitudinal axis, and wherein the angle between the extension direction of the longitudinal axis and the absorption axis of the polarizing functional layer is -5 degrees to 5 degrees. [20] Display board according to claim 19, characterized by, that the whisker is selected from at least one of the following: calcium carbonate whisker, barium sulfate whisker, titanium oxide whisker, aluminum oxide whisker, zirconia whisker, zinc oxide whisker, boehmite whisker, aluminum borate whisker, calcium silicate whisker, magnesium sulfate whisker, magnesium sulfate hydrate whisker and potassium titanate whisker, wherein the material of the polarizing functional layer comprises polyvinyl alcohol.

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