Polarizer and display device

Abstract

The embodiment of the utility model discloses a polaroid and a display device, the polaroid comprises a polarizing layer, a first protective layer and a bonding layer between the polarizing layer and the first protective layer, adjusting particles are dispersed in the bonding layer, and the adjusting particles comprise first type adjusting particles and / or second type adjusting particles. The adjusting particles are distributed on the bonding layer between the polarizing layer and the first protective layer, the length-diameter ratio of the first type of adjusting particles is larger than or equal to 5 and smaller than or equal to 50, and the length-diameter ratio of the second type of adjusting particles is larger than or equal to 1 and smaller than 5. The display quality of the display device with the optical film is improved.

Description

Technical Field

[0001] The utility model relates to the display field, and in particular to a polarizing film and a display device. Background Art

[0002] With the development of display technology, people have higher and higher requirements for the display quality of display devices. When the display viewing angle of existing display devices gradually increases, the polarizers will cause deviations in display colors and other aspects of the display device. The display quality of the display device when viewed from the side is insufficient and there is still room for improvement.

[0003] Therefore, there is an urgent need for a polarizer and a display device to solve the above technical problems. Summary of the invention

[0004] The utility model provides a polarizing film and a display device, which can alleviate the current technical problem that the display quality of the display device still needs to be improved due to the deviation of the display color and other aspects generated by the polarizing film when the display viewing angle increases.

[0005] The utility model provides a polarizer, comprising:

[0006] Polarizing layer;

[0007] A first protective layer, located on one side of the polarizing layer;

[0008] an adhesive layer, located between the polarizing layer and the first protective layer;

[0009] regulating particles, the regulating particles being dispersed in the adhesive layer;

[0010] Wherein, the regulating particles include:

[0011] The first type of regulating particles has a plurality of first cross sections, each of the first cross sections has a first inscribed circle, the ratio of the major axis length of the first type of regulating particles to the diameter of the first inscribed circle with the largest diameter among the plurality of first inscribed circles is greater than or equal to 5, and the ratio of the major axis length of the first type of regulating particles to the diameter of the first inscribed circle with the largest diameter among the plurality of first inscribed circles is less than or equal to 50; and / or

[0012] The second type of regulating particles has multiple second cross-sections, each of the second cross-sections has a second inscribed circle, the ratio of the major axis length of the second type of regulating particles to the diameter of the second inscribed circle with the largest diameter among the multiple second inscribed circles is greater than or equal to 1, and the ratio of the major axis length of the second type of regulating particles to the diameter of the second inscribed circle with the largest diameter among the multiple second inscribed circles is less than 5.

[0013] Preferably, the adhesive layer comprises a first adhesive layer, the first adhesive layer is adhered between the first protective layer and the polarizing layer, and the regulating particles are dispersed in the first adhesive layer; or,

[0014] The polarizer also includes a second protective layer, which is located between the first protective layer and the polarizing layer. The adhesive layer also includes a second adhesive layer, the first adhesive layer is bonded between the second protective layer and the polarizing layer, and the second adhesive layer is bonded between the first protective layer and the second protective layer. The regulating particles are dispersed in the first adhesive layer and / or the second adhesive layer.

[0015] Preferably, the first adhesive layer comprises a first adhesive sublayer, and the regulating particles are dispersed in at least the first adhesive sublayer in the first adhesive layer; and / or,

[0016] The second adhesive layer further includes a second adhesive sublayer, and the regulating particles are dispersed in at least the second adhesive sublayer in the second adhesive layer.

[0017] Preferably, the first adhesive layer further includes a third adhesive sublayer, the third adhesive sublayer is located on a side of the first adhesive sublayer close to the polarizing layer, and the regulating particles are dispersed in the first adhesive sublayer and the third adhesive sublayer in the first adhesive layer; and / or,

[0018] The second adhesive layer further includes a fourth adhesive sublayer, which is located on a side of the second adhesive sublayer close to the polarizing layer, and the regulating particles are dispersed in the second adhesive sublayer and the fourth adhesive sublayer in the second adhesive layer.

[0019] Preferably, the regulating particles are dispersed in the first adhesive sublayer and the third adhesive sublayer in the first adhesive layer, the material of the first adhesive sublayer is selected from pressure-sensitive adhesive, and the material of the third adhesive sublayer is selected from pressure-sensitive adhesive; and / or,

[0020] The regulating particles are dispersed in the second adhesive sublayer and the fourth adhesive sublayer in the second adhesive layer. The material of the second adhesive sublayer is selected from pressure-sensitive adhesive, and the material of the fourth adhesive sublayer is selected from pressure-sensitive adhesive.

[0021] Preferably, the regulating particles are dispersed in the first adhesive layer in the first adhesive sublayer and the third adhesive sublayer, the first adhesive layer further comprises a fifth adhesive sublayer, the fifth adhesive sublayer is located on a side of the third adhesive sublayer close to the polarizing layer, and the regulating particles are dispersed in the first adhesive layer outside the fifth adhesive sublayer; and / or,

[0022] The regulating particles are dispersed in the second adhesive sublayer and the fourth adhesive sublayer in the second adhesive layer. The second adhesive layer also includes a sixth adhesive sublayer. The sixth adhesive sublayer is located on the side of the fourth adhesive sublayer close to the polarizing layer. The regulating particles are dispersed in the second adhesive layer outside the sixth adhesive sublayer.

[0023] Preferably, the first protective layer includes a first hydrophilic sublayer disposed close to the polarizing layer, the first adhesive layer is bonded between the polarizing layer and the first protective layer, the regulating particles are dispersed in the first adhesive layer, and the peeling force between the first adhesive layer and the first hydrophilic sublayer is greater than the peeling force between the first adhesive layer and the polarizing layer; or,

[0024] The regulating particles are dispersed in the second adhesive layer, and the peeling force between the second adhesive layer and the first hydrophilic sublayer is greater than the peeling force between the second adhesive layer and the second protective layer 108 .

[0025] Preferably, the first type of regulating particles is selected from at least one of the first sub-type regulating particles, the second sub-type regulating particles, the third sub-type regulating particles, the fourth sub-type regulating particles, and the fifth sub-type regulating particles, which have different shapes, and the second type of regulating particles is selected from at least one of the sixth sub-type regulating particles, the seventh sub-type regulating particles, the eighth sub-type regulating particles, the ninth sub-type regulating particles, and the tenth sub-type regulating particles, which have different shapes.

[0026] Wherein, along the extension direction of the long axis of the first sub-category regulating particle, the change value of the diameter of the first inscribed circle of the first cross section of the first sub-category regulating particle is less than or equal to 0.3 micrometers;

[0027] Along the extension direction of the long axis of the second subclass regulating particle, the change value of the diameter of the first inscribed circle of the first cross section located in the middle of the second subclass regulating particle is less than or equal to 1 micron, and along the direction away from the middle of the second subclass regulating particle, the diameter of the first inscribed circle of the first cross section located at the first end of the second subclass regulating particle gradually decreases, and the change value of the diameter of the first inscribed circle of the first cross section located at the second end of the second subclass regulating particle is less than or equal to 1 micron;

[0028] Along the extension direction of the long axis of the third subclass regulating particle, the change value of the diameter of the first inscribed circle of the first cross section located in the middle of the third subclass regulating particle is less than or equal to 1 micron, and along the direction away from the middle of the third subclass regulating particle, the diameter of the first inscribed circle of the first cross section located at the first end of the third subclass regulating particle gradually decreases, and the diameter of the first inscribed circle of the first cross section located at the second end of the third subclass regulating particle gradually decreases;

[0029] The first end of the fourth subclass regulating particle is connected to the second end of the fourth subclass regulating particle, and the diameter of the first inscribed circle located at the first cross section of the fourth subclass regulating particle gradually decreases along the direction from the first end of the fourth subclass regulating particle to the second end of the fourth subclass regulating particle;

[0030] The first end of the fifth subclass regulating particle is connected to the second end of the fifth subclass regulating particle, and the diameter of the first inscribed circle of the first cross section located at the first end of the fifth subclass regulating particle gradually decreases along the direction away from the second end of the fifth subclass regulating particle, and the diameter of the first inscribed circle of the first cross section located at the second end of the fifth subclass regulating particle gradually decreases along the direction away from the first end of the fifth subclass regulating particle;

[0031] Along the extension direction of the long axis of the sixth subclass regulating particle, the change value of the diameter of the second inscribed circle of the second cross section of the sixth subclass regulating particle is less than or equal to 0.3 micrometers;

[0032] The first end of the seventh subclass regulating particle is connected to the second end of the seventh subclass regulating particle, and the diameter of the second inscribed circle of the second cross section located at the first end of the seventh subclass regulating particle gradually decreases in a direction away from the second end of the seventh subclass regulating particle, and the diameter of the second inscribed circle of the second cross section located at the second end of the seventh subclass regulating particle gradually decreases in a direction away from the first end of the seventh subclass regulating particle;

[0033] Along the extension direction of the long axis of the eighth subclass regulating particle, the change value of the diameter of the second inscribed circle of the second cross section located in the middle part of the eighth subclass regulating particle is less than or equal to 1 micron, and along the direction away from the middle part of the eighth subclass regulating particle, the diameter of the second inscribed circle of the second cross section located at the first end of the eighth subclass regulating particle gradually decreases, and the change value of the diameter of the second inscribed circle of the second cross section located at the second end of the eighth subclass regulating particle is less than or equal to 1 micron;

[0034] Along the extension direction of the long axis of the ninth subclass regulating particle, the change value of the diameter of the second inscribed circle of the second cross section located in the middle part of the ninth subclass regulating particle is less than or equal to 1 micron, and along the direction away from the middle part of the ninth subclass regulating particle, the diameter of the second inscribed circle of the second cross section located at the first end of the ninth subclass regulating particle gradually decreases, and the diameter of the second inscribed circle of the second cross section located at the second end of the ninth subclass regulating particle gradually decreases;

[0035] The first end of the tenth subclass regulating particle is connected to the second end of the tenth subclass regulating particle, and the diameter of the second inscribed circle of the second cross-section of the tenth subclass regulating particle gradually decreases along the direction from the first end of the tenth subclass regulating particle to the second end of the tenth subclass regulating particle.

[0036] Preferably, the polarizer further comprises a first optical functional layer located on one side of the first protective layer, and the first optical functional layer comprises at least one of an anti-glare sublayer, a transparent hardening sublayer, a low-reflection sublayer, an anti-reflection sublayer, an anti-fingerprint sublayer, and an anti-static electron layer;

[0037] Wherein, the first optical functional layer is located on a side of the first protective layer away from the polarizing layer.

[0038] The utility model also provides a display device, comprising the polarizing film as mentioned above.

[0039] The utility model improves the chromaticity viewing angle and contrast of the polarizer and enhances the display quality of the display device with the optical film by distributing the regulating particles in the adhesive layer between the polarizer and the first protective layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 This is a schematic diagram of the first structure of the polarizer provided by the embodiment of the utility model;

[0042] Figure 2 This is a schematic diagram of the second structure of the polarizer provided by the embodiment of the utility model;

[0043] Figure 3 This is a third structural schematic diagram of the polarizer provided by the embodiment of the utility model;

[0044] Figure 4 This is a fourth structural schematic diagram of the polarizer provided by the embodiment of the utility model;

[0045] Figure 5 This is a fifth structural schematic diagram of the polarizer provided by the embodiment of the utility model;

[0046] Figure 6 This is a sixth structural schematic diagram of the polarizer provided by the embodiment of the utility model;

[0047] Figure 7This is a seventh structural schematic diagram of the polarizer provided by the embodiment of the utility model;

[0048] Figure 8 This is a schematic diagram of the eighth structure of the polarizer provided by the embodiment of the utility model;

[0049] Fig. 9 This is a ninth structural schematic diagram of a polarizer provided by an embodiment of the utility model;

[0050] Fig.10 This is a tenth structural schematic diagram of a polarizer provided by an embodiment of the utility model;

[0051] Fig.11 This is a schematic diagram of the eleventh structure of the polarizer provided by the embodiment of the utility model;

[0052] Fig.12 This is a twelfth structural schematic diagram of the polarizer provided by the embodiment of the utility model;

[0053] Fig.13 It is a structural schematic diagram of a display device provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model. In the utility model, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0055] At present, when the display viewing angle of the display device increases, the polarizer of the display device causes deviations in display color and other aspects of the display device, resulting in a technical problem that the display quality of the display device still has room for improvement.

[0056] See also Figures 1 to 12 The present utility model embodiment provides a polarizer 100, comprising:

[0057] Polarizing layer 101;

[0058] A first protective layer 102, located on one side of the polarizing layer 101;

[0059] An adhesive layer 103 is located between the polarizing layer 101 and the first protective layer 102;

[0060] Adjusting particles 104, wherein the adjusting particles 104 are dispersed in the adhesive layer 103;

[0061] Wherein, the regulating particle 104 comprises:

[0062] The first type of regulating particle 105 has a plurality of first cross sections, each of the first cross sections has a first inscribed circle, the ratio of the major axis length of the first type of regulating particle 105 to the diameter of the first inscribed circle with the largest diameter among the plurality of first inscribed circles is greater than or equal to 5, and the ratio of the major axis length of the first type of regulating particle 105 to the diameter of the first inscribed circle with the largest diameter among the plurality of first inscribed circles is less than or equal to 50; and / or

[0063] The second type of regulating particle 106 has multiple second cross-sections, each of which has a second inscribed circle, the ratio of the major axis length of the second type of regulating particle 106 to the diameter of the second inscribed circle with the largest diameter among the multiple second inscribed circles is greater than or equal to 1, and the ratio of the major axis length of the second type of regulating particle 106 to the diameter of the second inscribed circle with the largest diameter among the multiple second inscribed circles is less than 5.

[0064] The embodiment of the utility model improves the chromaticity viewing angle and contrast of the polarizer 100 by distributing the regulating particles 104 in the adhesive layer 103 between the polarizing layer 101 and the first protective layer 102, thereby enhancing the display quality of the display device with the optical film.

[0065] The technical solution of the utility model is now described in conjunction with specific embodiments.

[0066] See also Figures 1 to 7 In some embodiments, the adhesive layer 103 includes a first adhesive layer 107, the first adhesive layer 107 is adhered between the first protective layer 102 and the polarizing layer 101, and the regulating particles 104 are dispersed in the first adhesive layer 107. At this time, the adhesive layer 103 may include only the first adhesive layer 107.

[0067] See also Figures 8 to 12In some embodiments, the polarizer 100 further includes a second protective layer 108, and the second protective layer 108 is located between the first protective layer 102 and the polarizing layer 101. At this time, the adhesive layer 103 further includes a second adhesive layer 109, the first adhesive layer 107 is bonded between the second protective layer 108 and the polarizing layer 101, and the second adhesive layer 109 is bonded between the first protective layer 102 and the second protective layer 108. The regulating particles 104 are dispersed in the first adhesive layer 107 and / or the second adhesive layer 109.

[0068] See also Figure 1 to Figure 2 In some embodiments, the first adhesive layer 107 may be composed of a layer of adhesive sublayer. That is, the first adhesive layer 107 includes a first adhesive sublayer 110, and the regulating particles 104 are dispersed in the first adhesive sublayer 110 in the first adhesive layer 107. The thickness of the first adhesive sublayer 110 is the thickness of the first adhesive layer 107. At this time, the thickness of the first adhesive layer 107 (the first adhesive sublayer 110) is greater than or equal to 20 microns, and the thickness of the first adhesive layer 107 (the first adhesive sublayer 110) is less than or equal to 40 microns. For example, the thickness of the first adhesive layer 107 (the first adhesive sublayer 110) can be 21 microns, 24 microns, 25 microns, 26 microns, 28 microns, 30 microns, 32 microns, 35 microns, 36 microns, 38 microns, etc., and the regulating particles 104 are dispersed in a thickness range of 20 microns to 40 microns.

[0069] See also Figures 8 to 9 In some embodiments, the second adhesive layer 109 may be composed of a layer of adhesive sublayer. That is, the second adhesive layer 109 includes a second adhesive sublayer 111, and the regulating particles 104 are dispersed in the first adhesive sublayer 110 and / or the second adhesive sublayer 111. The thickness of the second adhesive sublayer 111 is the thickness of the second adhesive layer 109. At this time, the thickness of the second adhesive layer 109 (the second adhesive sublayer 111) is greater than or equal to 20 microns, and the thickness of the second adhesive layer 109 (the second adhesive sublayer 111) is less than or equal to 40 microns. For example, the thickness of the second adhesive layer 109 (the second adhesive sublayer 111) can be 21 microns, 24 microns, 25 microns, 26 microns, 28 microns, 30 microns, 32 microns, 35 microns, 36 microns, 38 microns, etc., and the regulating particles 104 are dispersed in a thickness range of 20 microns to 40 microns.

[0070] In some embodiments, when the first adhesive layer 107 is composed of a layer of adhesive sublayer, the material of the first adhesive layer 107 can be selected from one of pressure-sensitive adhesive, water-based adhesive, and ultraviolet light curing adhesive; when the second adhesive layer 109 is composed of a layer of adhesive sublayer, the material of the second adhesive layer 109 can be selected from one of pressure-sensitive adhesive, water-based adhesive, and ultraviolet light curing adhesive. The pressure-sensitive adhesive can be a heat-curing pressure-sensitive adhesive. The pressure-sensitive adhesive, water-based adhesive, and ultraviolet light curing adhesive can be commercially available adhesive materials.

[0071] See also Figures 3 to 7 In some embodiments, the first adhesive layer 107 includes a first adhesive sublayer 110 and a third adhesive sublayer 112, and the third adhesive sublayer 112 is located on a side of the first adhesive sublayer 110 close to the polarizing layer 101. The regulating particles 104 are at least dispersed in the first adhesive sublayer 110 in the first adhesive layer 107. And / or, please refer to Figures 10 to 12 The second adhesive layer 109 includes a second adhesive sublayer 111 and a fourth adhesive sublayer 113, and the fourth adhesive sublayer 113 is located on a side of the second adhesive sublayer 111 close to the polarizing layer 101. The regulating particles 104 are at least dispersed in the second adhesive sublayer 111 in the second adhesive layer 109.

[0072] In some embodiments, the material of the first adhesive sublayer 110, the material of the first adhesive sublayer 110, the material of the third adhesive sublayer 112, and the material of the fourth adhesive sublayer 113 are independently selected from one of a pressure-sensitive adhesive, a water-based adhesive, and a UV-curable adhesive. The pressure-sensitive adhesive, the water-based adhesive, the UV-curable adhesive, etc. can be commercially available adhesive materials, the pressure-sensitive adhesive can be an acrylic resin pressure-sensitive adhesive, the water-based adhesive can be selected from a polyvinyl alcohol adhesive material, and the UV-curable adhesive can be an acrylic resin or epoxy resin adhesive material.

[0073] In some embodiments, the material of the first adhesive sublayer 110 is selected from a pressure-sensitive adhesive. When the material of the third adhesive sublayer 112 is selected from adhesive materials such as water-based adhesives and ultraviolet-cured adhesives, the regulating particles 104 can be dispersed in the first adhesive sublayer 110 and not dispersed in the third adhesive sublayer 112. The chain length of the resin in the pressure-sensitive adhesive is longer. When the material of the first adhesive sublayer 110 uses a pressure-sensitive adhesive, it is easier to arrange the regulating particles 104 along the long chain direction of the resin in the process of forming the adhesive sublayer (such as a coating process), so that the arrangement of the regulating particles 104 in the first adhesive sublayer 110 is more regular, and the improvement effect of the regulating particles 104 on the optical properties of the polarizer 100, such as the chromatic viewing angle and contrast, is enhanced. Similarly, the material of the second adhesive sublayer 111 is selected from a pressure-sensitive adhesive. When the material of the fourth adhesive sublayer 113 is selected from adhesive materials such as water-based adhesives and ultraviolet-cured adhesives, the regulating particles 104 can be dispersed in the second adhesive sublayer 111 and not dispersed in the fourth adhesive sublayer 113.

[0074] See also Figures 3 to 5 In some embodiments, the regulating particles 104 are also dispersed in the third adhesive sublayer 112 in the first adhesive layer 107. When the regulating particles 104 are also dispersed in the third adhesive sublayer 112, the material of the third adhesive sublayer 112 is preferably a pressure-sensitive adhesive, which is conducive to a more regular arrangement of the regulating particles 104 in the third adhesive sublayer 112, and enhances the improvement effect of the regulating particles 104 on the optical properties of the polarizer 100, such as chromatic viewing angle and contrast. Similarly, please refer to Fig.10 and Fig.12 The regulating particles 104 are also dispersed in the fourth adhesive sublayer 113 in the second adhesive layer 109. When the regulating particles 104 are also dispersed in the fourth adhesive sublayer 113, the material of the fourth adhesive sublayer 113 is preferably a pressure-sensitive adhesive.

[0075] In some embodiments, when the regulating particles 104 are dispersed in the first adhesive sublayer 110 and the third adhesive sublayer 112, since the first adhesive sublayer 110 and the third adhesive sublayer 112 are formed in steps, the thickness of the first adhesive sublayer 110 and the third adhesive sublayer 112 can be lower than the thickness of the first adhesive layer 107 formed by a single adhesive sublayer, which is more conducive to reducing the angle formed by the regulating particles 104 and the first plane, and is conducive to improving the improvement effect of the regulating particles 104 on the optical properties of the polarizer 100, such as the chromatic viewing angle and contrast. Wherein, the first plane is the plane where the polarizing layer 101 is located. Similarly, when the regulating particles 104 are dispersed in the second bonding sublayer 111 and the fourth bonding sublayer 113, since the second bonding sublayer 111 and the fourth bonding sublayer 113 are formed in steps, the thicknesses of the second bonding sublayer 111 and the fourth bonding sublayer 113 can be lower than the thickness of the second bonding layer 109 formed by a single bonding sublayer, which is more conducive to reducing the angle formed by the regulating particles 104 and the first plane, and is beneficial to enhancing the improvement effect of the regulating particles 104 on the optical properties of the polarizer 100, such as chromaticity viewing angle and contrast.

[0076] In some embodiments, the thickness of the first adhesive sublayer 110 is greater than or equal to the thickness of the third adhesive sublayer 112 , and / or the thickness of the second adhesive sublayer 111 is greater than or equal to the thickness of the fourth adhesive sublayer 113 .

[0077] In some embodiments, when the regulating particles 104 are dispersed in the first adhesive sublayer 110 and not dispersed in the third adhesive sublayer 112 in the first adhesive layer 107, the thickness of the first adhesive sublayer 110 is greater than the thickness of the third adhesive sublayer 112. The third adhesive sublayer 112 is in contact with the polarizing layer 101, and the third adhesive sublayer 112 is in contact with the first adhesive sublayer 110, that is, the third adhesive sublayer 112 is bonded between the first adhesive sublayer 110 and the polarizing layer 101, and the third adhesive sublayer 112 plays a reinforcing role between the first adhesive sublayer 110 and the polarizing layer 101, which is beneficial to improving the bonding performance of the first adhesive layer 107.

[0078] In some embodiments, when the regulating particles 104 are dispersed in the second adhesive sublayer 111 and not dispersed in the fourth adhesive sublayer 113 in the second adhesive layer 109, the thickness of the second adhesive sublayer 111 is greater than the thickness of the fourth adhesive sublayer 113. The fourth adhesive sublayer 113 is in contact with the second protective layer 108, and the fourth adhesive sublayer 113 is in contact with the second adhesive sublayer 111, that is, the fourth adhesive sublayer 113 is bonded between the second adhesive sublayer 111 and the polarizing layer 101, and the fourth adhesive sublayer 113 plays a reinforcing role between the second adhesive sublayer 111 and the polarizing layer 101, which is beneficial to improving the bonding performance of the second adhesive layer 109.

[0079] See also Figure 7 In some embodiments, when the regulating particles 104 are dispersed in the first adhesive sublayer 110 and the third adhesive sublayer 112 in the first adhesive layer 107, the first adhesive layer 107 also includes a fifth adhesive sublayer 114, and the fifth adhesive sublayer 114 is located on the side of the third adhesive sublayer 112 close to the polarizing layer 101, and the regulating particles 104 are dispersed outside the fifth adhesive sublayer 114. When the first adhesive layer 107 is bonded between the first protective layer 102 and the polarizing layer 101, the fifth adhesive sublayer 114 is in contact with the polarizing layer 101, and the fifth adhesive sublayer 114 is in contact with the third adhesive sublayer 112; or, when the first adhesive layer 107 is bonded between the second protective layer 108 and the polarizing layer 101, the fifth adhesive sublayer 114 is in contact with the polarizing layer 101, and the fifth adhesive sublayer 114 is in contact with the third adhesive sublayer 112, that is, the fifth adhesive sublayer 114 is bonded between the polarizing layer 101 and the third adhesive sublayer 112, which plays a reinforcing role and is beneficial to improving the bonding performance of the first adhesive layer 107.

[0080] See also Fig.12 In some embodiments, the regulating particles 104 are dispersed in the second adhesive sublayer 111 and the fourth adhesive sublayer 113 in the second adhesive layer 109, and the second adhesive layer 109 further includes a sixth adhesive sublayer 115, which is located on the side of the fourth adhesive sublayer 113 close to the polarizing layer 101, and the regulating particles 104 are dispersed outside the sixth adhesive sublayer 115. The sixth adhesive sublayer 115 is in contact with the second protective layer 108, and the sixth adhesive sublayer 115 is in contact with the fourth adhesive sublayer 113, that is, the sixth adhesive sublayer 115 is bonded between the polarizing layer 101 and the fourth adhesive sublayer 113, which plays a reinforcing role and is conducive to improving the bonding performance of the second adhesive layer 109.

[0081] In some embodiments, the material of the fifth adhesive sublayer 114 and the material of the sixth adhesive sublayer 115 can be independently selected from one of pressure-sensitive adhesive, water-based adhesive, and ultraviolet light-curing adhesive, which can be commercially available adhesive materials.

[0082] In some embodiments, when the regulating particles 104 are dispersed in the first bonding sublayer 110 and the third bonding sublayer 112, the thickness of the first bonding sublayer 110 and the third bonding sublayer 112 may be the same, or the thickness of the first bonding sublayer 110 is greater than the thickness of the third bonding sublayer 112.

[0083] In some embodiments, when the regulating particles 104 are dispersed in the second bonding sublayer 111 and the fourth bonding sublayer 113, the thickness of the second bonding sublayer 111 and the fourth bonding sublayer 113 may be the same, or the thickness of the second bonding sublayer 111 is greater than the thickness of the fourth bonding sublayer 113.

[0084] In some embodiments, the ratio of the thickness of the first adhesive sublayer 110 to the thickness of the third adhesive sublayer 112 is less than or equal to 40:1, and the ratio of the thickness of the first adhesive sublayer 110 to the thickness of the third adhesive sublayer 112 is less than or equal to 1:1. For example, the ratio of the thickness of the first adhesive sublayer 110 to the thickness of the third adhesive sublayer 112 may be 1.5:1, 2:1, 3:1, 4:1, 5:1, 6:1, 7:1, 8:1, 10:1, 14:1, 15:1, 16:1, 19:1, 20:1, 24:1, 25:1, 29:1, 30:1, 34:1, 35:1, 39:1, etc.

[0085] In some embodiments, the third bonding sublayer 112 is bonded between the first bonding sublayer 110 and the polarizing layer 101. When the regulating particles 104 are dispersed in the first bonding sublayer 110 and not dispersed in the third bonding sublayer 112, the third bonding sublayer 112 serves to enhance the bonding effect. The thickness of the third bonding sublayer 112 is less than or equal to 10 microns. For example, the thickness of the third bonding sublayer 112 can be 1 micron, 2 microns, 3 microns, 4 microns, 5 microns, 6 microns, 7 microns, 8 microns, 9 microns, etc.

[0086] In some embodiments, the fourth bonding sublayer 113 is bonded between the second bonding sublayer 111 and the second protective layer 108. When the regulating particles 104 are dispersed in the second bonding sublayer 111 and not dispersed in the fourth bonding sublayer 113, the fourth bonding sublayer 113 serves to enhance the bonding effect. The thickness of the fourth bonding sublayer 113 is less than or equal to 10 microns. For example, the thickness of the fourth bonding sublayer 113 can be 1 micron, 2 microns, 3 microns, 4 microns, 5 microns, 6 microns, 7 microns, 8 microns, 9 microns, etc.

[0087] In some embodiments, the regulating particles 104 are dispersed in the first bonding sublayer 110, and when the regulating particles 104 are only dispersed in the first bonding sublayer 110 in the first bonding layer 107, the thickness of the first bonding sublayer 110 is greater than or equal to 20 microns, and the thickness of the first bonding sublayer 110 is less than or equal to 40 microns. For example, it can be 21 microns, 22 microns, 24 microns, 25 microns, 26 microns, 27 microns, 28 microns, 30 microns, 31 microns, 32 microns, 33 microns, 35 microns, 36 microns, 37 microns, 39 microns, etc., so that the angle formed by the regulating particles 104 and the first plane is within a suitable range, which is beneficial to enhance the improvement effect of the regulating particles 104 on the optical properties of the polarizer 100 such as chromaticity viewing angle and contrast.

[0088] In some embodiments, the regulating particles 104 are dispersed in the second bonding sublayer 111, and when the regulating particles 104 are only dispersed in the second bonding sublayer 111 in the second bonding layer 109, the thickness of the second bonding sublayer 111 is greater than or equal to 20 microns, and the thickness of the second bonding sublayer 111 is less than or equal to 40 microns. For example, it can be 21 microns, 22 microns, 24 microns, 25 microns, 26 microns, 27 microns, 28 microns, 30 microns, 31 microns, 32 microns, 33 microns, 35 microns, 36 microns, 37 microns, 39 microns, etc., so that the angle formed by the regulating particles 104 and the first plane is within a suitable range, which is beneficial to enhance the improvement effect of the regulating particles 104 on the optical properties of the polarizer 100 such as chromaticity viewing angle and contrast.

[0089] In some embodiments, when the regulating particles 104 are dispersed in the first bonding sublayer 110 and the third bonding sublayer 112, the regulating particles 104 can be dispersed only in the first bonding sublayer 110 and the third bonding sublayer 112 in the first bonding layer 107. At this time, the sum of the thicknesses of the first bonding sublayer 110 and the third bonding sublayer 112 is greater than or equal to 20 microns, and the sum of the thicknesses of the first bonding sublayer 110 and the third bonding sublayer 112 is less than or equal to 40 microns, for example, 21 microns, 22 microns, 24 microns, 25 microns, 26 microns, 27 microns, 28 microns, 30 microns, 31 microns, 32 microns, 33 microns, 35 microns, 36 microns, 37 microns, 39 microns, etc., so that the regulating particles 104 are distributed within a suitable thickness range while reducing the angle formed by the regulating particles 104 and the first plane, thereby further enhancing the improvement effect of the regulating particles 104 on the optical properties of the polarizer 100, such as the chromaticity viewing angle and contrast.

[0090] In some embodiments, when the regulating particles 104 are dispersed in the second bonding sublayer 111 and the fourth bonding sublayer 113, the regulating particles 104 can be dispersed only in the second bonding sublayer 111 and the fourth bonding sublayer 113 in the second bonding layer 109. At this time, the sum of the thicknesses of the second bonding sublayer 111 and the fourth bonding sublayer 113 is greater than or equal to 20 microns, and the sum of the thicknesses of the second bonding sublayer 111 and the fourth bonding sublayer 113 is less than or equal to 40 microns, for example, 21 microns, 22 microns, 24 microns, 25 microns, 26 microns, 27 microns, 28 microns, 30 microns, 31 microns, 32 microns, 33 microns, 35 microns, 36 microns, 37 microns, 39 microns, etc., so that the regulating particles 104 are distributed within a suitable thickness range while reducing the angle formed by the regulating particles 104 and the first plane, thereby further enhancing the improvement effect of the regulating particles 104 on the optical properties of the polarizer 100, such as the chromaticity viewing angle and contrast.

[0091] In some embodiments, the first adhesive layer 107 further includes at least one adhesive sublayer located between the first adhesive sublayer 110 and the third adhesive sublayer 112. The regulating particles 104 are dispersed in the first adhesive sublayer 110 and the adhesive sublayer between the first adhesive sublayer 110 and the third adhesive sublayer 112, and the regulating particles 104 are not dispersed in the third adhesive sublayer 112. Alternatively, the regulating particles 104 are dispersed in the first adhesive sublayer 110, the third adhesive sublayer 112, and the adhesive sublayer between the first adhesive sublayer 110 and the third adhesive sublayer 112 in the first adhesive layer 107.

[0092] In some embodiments, the second adhesive layer 109 further includes at least one adhesive sublayer located between the second adhesive sublayer 111 and the fourth adhesive sublayer 113. The regulating particles 104 are dispersed in the second adhesive sublayer 111, the adhesive sublayer between the second adhesive sublayer 111 and the fourth adhesive sublayer 113, and the regulating particles 104 are not dispersed in the fourth adhesive sublayer 113. Alternatively, the regulating particles 104 are dispersed in the second adhesive sublayer 111, the fourth adhesive sublayer 113, and the adhesive sublayer between the second adhesive sublayer 111 and the fourth adhesive sublayer 113 in the second adhesive layer 109.

[0093] In some embodiments, the regulating particles 104 are dispersed in the first bonding sublayer 110, and the bonding sublayer between the first bonding sublayer 110 and the third bonding sublayer 112. When the regulating particles 104 are not dispersed in the third bonding sublayer 112, the sum of the thicknesses of the first bonding sublayer 110 and the bonding sublayer between the first bonding sublayer 110 and the third bonding sublayer 112 is greater than or equal to 20 microns and less than or equal to 40 microns. For example, it can be 21 microns, 22 microns, 24 microns, 25 microns, 26 microns, 27 microns, 28 microns, 30 microns, 31 microns, 32 microns, 33 microns, 35 microns, 36 microns, 37 microns, 39 microns, etc. For example: the first adhesive layer 107 also includes a seventh adhesive sublayer, the regulating particles 104 are dispersed in the first adhesive sublayer 110 and the seventh adhesive sublayer, the sum of the thicknesses of the first adhesive sublayer 110 and the seventh adhesive sublayer is greater than or equal to 20 microns, and the sum of the thicknesses of the first adhesive sublayer 110 and the seventh adhesive sublayer is less than or equal to 40 microns.

[0094] In some embodiments, the regulating particles 104 are dispersed in the second bonding sublayer 111, and the bonding sublayer between the second bonding sublayer 111 and the fourth bonding sublayer 113. When the regulating particles 104 are not dispersed in the fourth bonding sublayer 113, the sum of the thicknesses of the second bonding sublayer 111 and the bonding sublayer between the second bonding sublayer 111 and the fourth bonding sublayer 113 is greater than or equal to 20 microns and less than or equal to 40 microns. For example, it can be 21 microns, 22 microns, 24 microns, 25 microns, 26 microns, 27 microns, 28 microns, 30 microns, 31 microns, 32 microns, 33 microns, 35 microns, 36 microns, 37 microns, 39 microns, etc. For example: the second adhesive layer 109 also includes an eighth adhesive sublayer, the regulating particles 104 are dispersed in the second adhesive sublayer 111 and the eighth adhesive sublayer, the sum of the thicknesses of the second adhesive sublayer 111 and the eighth adhesive sublayer is greater than or equal to 20 microns, and the sum of the thicknesses of the second adhesive sublayer 111 and the eighth adhesive sublayer is less than or equal to 40 microns.

[0095] In some embodiments, when the regulating particles 104 are dispersed in the first adhesive sublayer 110, the third adhesive sublayer 112 and the adhesive sublayer between the first adhesive sublayer 110 and the third adhesive sublayer 112 in the first adhesive layer 107, the sum of the thicknesses of the first adhesive sublayer 110, the third adhesive sublayer 112, and the adhesive sublayer between the first adhesive sublayer 110 and the third adhesive sublayer 112 is greater than or equal to 20 microns and less than or equal to 40 microns, for example, it can be 21 microns, 22 microns, 24 microns, 25 microns, 26 microns, 27 microns, 28 microns, 30 microns, 31 microns, 32 microns, 33 microns, 35 microns, 36 microns, 37 microns, 39 microns, etc. For example: the first adhesive layer 107 also includes a seventh adhesive sublayer, the regulating particles 104 are dispersed in the first adhesive sublayer 110, the third adhesive sublayer 112 and the seventh adhesive sublayer, the sum of the thicknesses of the first adhesive sublayer 110, the third adhesive sublayer 112 and the seventh adhesive sublayer is greater than or equal to 20 microns, and the sum of the thicknesses of the first adhesive sublayer 110, the third adhesive sublayer 112 and the seventh adhesive sublayer is less than or equal to 40 microns.

[0096] In some embodiments, when the regulating particles 104 are dispersed in the second adhesive sublayer 111, the fourth adhesive sublayer 113 and the adhesive sublayer between the second adhesive sublayer 111 and the fourth adhesive sublayer 113 in the second adhesive layer 109, the sum of the thicknesses of the second adhesive sublayer 111, the fourth adhesive sublayer 113, and the adhesive sublayer between the second adhesive sublayer 111 and the fourth adhesive sublayer 113 is greater than or equal to 20 microns and less than or equal to 40 microns, for example, it can be 21 microns, 22 microns, 24 microns, 25 microns, 26 microns, 27 microns, 28 microns, 30 microns, 31 microns, 32 microns, 33 microns, 35 microns, 36 microns, 37 microns, 39 microns, etc. For example: the second adhesive layer 109 also includes an eighth adhesive sublayer, the regulating particles 104 are dispersed in the second adhesive sublayer 111, the fourth adhesive sublayer 113 and the eighth adhesive sublayer, the sum of the thicknesses of the second adhesive sublayer 111, the fourth adhesive sublayer 113 and the eighth adhesive sublayer is greater than or equal to 20 microns, and the sum of the thicknesses of the second adhesive sublayer 111, the fourth adhesive sublayer 113 and the eighth adhesive sublayer is less than or equal to 40 microns.

[0097] In some embodiments, when the regulating particles 104 are also dispersed in the adhesive sublayer between the first adhesive sublayer 110 and the third adhesive sublayer 112, the material of the adhesive sublayer between the first adhesive sublayer 110 and the third adhesive sublayer 112 can be selected from one of a pressure-sensitive adhesive, a water-based adhesive, and an ultraviolet light-curing adhesive; and / or, when the regulating particles 104 are also dispersed in the adhesive sublayer between the second adhesive sublayer 111 and the fourth adhesive sublayer 113, the material of the adhesive sublayer between the second adhesive sublayer 111 and the fourth adhesive sublayer 113 can be selected from one of a pressure-sensitive adhesive, a water-based adhesive, and an ultraviolet light-curing adhesive. The above-mentioned pressure-sensitive adhesive, water-based adhesive, ultraviolet light-curing adhesive, etc. can be commercially available adhesive materials. When the material of the adhesive sublayer between the first adhesive sublayer 110 and the third adhesive sublayer 112 is selected from a pressure-sensitive adhesive, it is beneficial to make the arrangement of the adjustment particles 104 in the adhesive sublayer between the first adhesive sublayer 110 and the third adhesive sublayer 112 more regular, and enhance the improvement effect of the adjustment particles 104 on the optical properties of the polarizer 100, such as the chromaticity viewing angle, contrast, etc. Similarly, when the material of the adhesive sublayer between the second adhesive sublayer 111 and the fourth adhesive sublayer 113 is selected from a pressure-sensitive adhesive, it is beneficial to make the arrangement of the adjustment particles 104 in the adhesive sublayer between the second adhesive sublayer 111 and the fourth adhesive sublayer 113 more regular, and enhance the improvement effect of the adjustment particles 104 on the optical properties of the polarizer 100, such as the chromaticity viewing angle, contrast, etc.

[0098] In some embodiments, the regulating particles 104 are dispersed in the first bonding sublayer 110 and the third bonding sublayer 112, or, when the regulating particles 104 are dispersed in the first bonding sublayer 110, the third bonding sublayer 112, or the bonding sublayer between the first bonding sublayer 110 and the third bonding sublayer 112, the first bonding layer 107 improves the bonding performance through the fifth bonding sublayer 114, and the thickness of the fifth bonding sublayer 114 is less than or equal to 10 microns. For example, the thickness of the fifth bonding sublayer 114 can be 1 micron, 2 microns, 3 microns, 4 microns, 5 microns, 6 microns, 7 microns, 8 microns, 9 microns, etc.

[0099] In some embodiments, the regulating particles 104 are dispersed in the second adhesive sublayer 111 and the fourth adhesive sublayer 113, or, when the regulating particles 104 are dispersed in the second adhesive sublayer 111, the fourth adhesive sublayer 113, and the adhesive sublayer between the second adhesive sublayer 111 and the fourth adhesive sublayer 113, the second adhesive layer 109 improves the bonding performance through the sixth adhesive sublayer 115, and the thickness of the sixth adhesive sublayer 115 is less than or equal to 10 microns. For example, the thickness of the sixth adhesive sublayer 115 can be 1 micron, 2 microns, 3 microns, 4 microns, 5 microns, 6 microns, 7 microns, 8 microns, 9 microns, etc.

[0100] In some embodiments, when the regulating particles 104 are dispersed in the adhesive layer 103, the addition of the regulating particles 104 destroys the molecular interactions of the materials of the adhesive layer 103, thereby reducing the adhesion of the adhesive layer 103. The first protective layer 102 includes a first hydrophilic sublayer arranged close to the polarizing layer 101, which is beneficial to enhancing the peeling force between the adhesive layer 103 in contact with the first protective layer 102 and the first protective layer 102, thereby increasing the difficulty of peeling the adhesive layer 103 from the first protective layer 102. Specifically, when the first adhesive layer 107 is bonded between the polarizing layer 101 and the first protective layer 102, the regulating particles 104 are dispersed in the first adhesive layer 107, and the peeling force between the first adhesive layer 107 and the first hydrophilic sublayer is greater than the peeling force between the first adhesive layer 107 and the polarizing layer 101; or, when the second adhesive layer 109 is bonded between the first protective layer 102 and the second protective layer 108, the regulating particles 104 are dispersed in the second adhesive layer 109, and the peeling force between the second adhesive layer 109 and the first hydrophilic sublayer is greater than the peeling force between the second adhesive layer 109 and the second protective layer 108. By means of the peeling force difference between the first adhesive layer 107 and the first protective layer 102, the first adhesive layer 107 and the polarizing layer 101, or the peeling force difference between the second adhesive layer 109 and the first protective layer 102, the second adhesive layer 109 and the second protective layer 108, when quality problems occur in the first protective layer 102 or other film layers on the side of the first protective layer 102 away from the polarizing layer 101, the first protective layer 102 and other film layers on the side of the first protective layer 102 away from the polarizing layer 101 are easily separated and replaced, thereby improving the recycling rate of the polarizer 100 and reducing the manufacturing cost.

[0101] In some embodiments, when the regulating particles 104 are dispersed in the second adhesive layer 109, the peeling force between the second adhesive layer 109 and the second protective layer 108 is greater than or equal to 100 gN / mm, and the peeling force between the second adhesive layer 109 and the second protective layer 108 is less than or equal to 600 gN / mm.

[0102] Please refer to Table 1, which shows the peeling force test results between the second adhesive layer and the second protective layer 108 when the regulating particles are dispersed in the second adhesive layer.

[0103] Table 1

[0104]

[0105]

[0106] The data in Table 1 were obtained by attaching the polarizer to a steel plate at 25°C using an adhesive peel strength tester (model: OMT8501) produced by Mester Industrial Systems (China) Co., Ltd., where the peeling angle was 180°, the sample width was 25 mm, the sample length was 150 mm, and the speed was 300 mm / min.

[0107] It can be seen from the results in Table 1 that by adding the regulating particles 104, the peeling force between the second adhesive layer and the second protective layer is effectively reduced to less than or equal to 600 gN / mm. When quality problems occur in the first protective layer or other film layers on the side of the first protective layer away from the polarizing layer, the first protective layer and other film layers on the side of the first protective layer away from the polarizing layer are facilitated to separate and replace.

[0108] In some embodiments, the hydrophilicity of the surface of the first hydrophilic sublayer close to the polarizing layer 101 is stronger than the hydrophilicity of the surface of the second protective layer 108 close to the first protective layer 102. Alternatively, the hydrophilicity of the surface of the first hydrophilic sublayer close to the polarizing layer 101 is stronger than the hydrophilicity of the surface of the second polarizing layer 101 close to the first protective layer 102.

[0109] In some embodiments, a water drop angle of a surface of the first hydrophilic sublayer close to the polarizing layer 101 is less than 90 degrees, for example, it can be 10 degrees, 20 degrees, 30 degrees, 40 degrees, 50 degrees, 60 degrees, 70 degrees, 80 degrees, etc.

[0110] In some embodiments, the second protective layer 108 includes a second hydrophilic sublayer close to the side of the polarizing layer 101, and the regulating particles 104 are dispersed in the first adhesive layer 107. The peeling force between the first adhesive layer 107 and the second hydrophilic sublayer is greater than the peeling force between the first adhesive layer 107 and the second protective layer 108, which is beneficial to the peeling and replacement of the second protective layer 108 when it is damaged, thereby improving the recycling rate of the polarizer 100 and reducing the manufacturing cost.

[0111] In some embodiments, the regulating particles 104 include first-type regulating particles 105 and / or second-type regulating particles 106. When the regulating particles 104 include the first-type regulating particles 105 and the second-type regulating particles 106, the first-type regulating particles 105 and the second-type regulating particles 106 may be at least partially mixed and distributed in the first adhesive layer 107, or the first-type regulating particles 105 and the second-type regulating particles 106 may be layered and distributed in the first adhesive layer 107. And / or, when the regulating particles 104 include the first-type regulating particles 105 and the second-type regulating particles 106, the first-type regulating particles 105 and the second-type regulating particles 106 may be at least partially mixed and distributed in the second adhesive layer 109, or the first-type regulating particles 105 and the second-type regulating particles 106 may be layered and distributed in the second adhesive layer 109. When the first type of regulating particles 105 and the second type of regulating particles 106 can be at least partially mixed and distributed in the first adhesive layer 107 , for example, the first type of regulating particles 105 and the second type of regulating particles 106 are at least dispersed in the first adhesive sublayer 110 .When the first type of regulating particles 105 and the second type of regulating particles 106 are layered and distributed in the first adhesive layer 107, the first type of regulating particles 105 are dispersed in the first adhesive sublayer 110, and the second type of regulating particles 106 are dispersed in the third adhesive sublayer 112; or, the first type of regulating particles 105 are dispersed in the third adhesive sublayer 112, and the second type of regulating particles 106 are dispersed in the first adhesive sublayer 110; or, the first type of regulating particles 105 are dispersed in the first adhesive sublayer 110 and the third adhesive sublayer 112, and the second type of regulating particles 106 are dispersed in the adhesive sublayer between the first adhesive sublayer 110 and the third adhesive sublayer 112; or, the first type of regulating particles 105 are dispersed in the first adhesive sublayer 110, and the adhesive sublayer between the first adhesive sublayer 110 and the third adhesive sublayer 112, and the second type of regulating particles 106 are dispersed in the third adhesive sublayer 112; or, the first type of regulating particles 105 are dispersed in the bonding sublayer between the first bonding sublayer 110 and the third bonding sublayer 112, and in the third bonding sublayer 112, and the second type of regulating particles 106 are dispersed in the first bonding sublayer 110; or, the second type of regulating particles 106 are dispersed in the first bonding sublayer 110 and the third bonding sublayer 112, and the first type of regulating particles 105 are dispersed in the bonding sublayer between the first bonding sublayer 110 and the third bonding sublayer 112; or, the second type of regulating particles 106 are dispersed in the first bonding sublayer 110 and the bonding sublayer between the first bonding sublayer 110 and the third bonding sublayer 112, and the first type of regulating particles 105 are dispersed in the third bonding sublayer 112; or, the second type of regulating particles 106 are dispersed in the bonding sublayer between the first bonding sublayer 110 and the third bonding sublayer 112, and in the third bonding sublayer 112, and the first type of regulating particles 105 are dispersed in the first bonding sublayer 110.

[0112] In some embodiments, the long axis of the first type of regulating particles 105 forms an acute angle with the first plane, and the size of the acute angle is related to the thickness of the bonding sublayer in which the first type of regulating particles 105 are distributed, and the length of the long axis of the first type of regulating particles 105. Specifically, the acute angle is less than or equal to arcsin(d / L). Wherein, d represents the thickness of the bonding sublayer in which the first type of regulating particles 105 are distributed, for example, the first type of regulating particles 105 dispersed in the first bonding sublayer 110, d represents the thickness of the first bonding sublayer 110. L represents the length of the long axis of the first type of regulating particles 105.

[0113] In some embodiments, the acute angle is greater than 0° and the acute angle is less than or equal to 40°, for example, it can be 1°, 2°, 5°, 8°, 10°, 12°, 15°, 18°, 20°, 25°, 28°, 30°, 35°, 38°, etc., which increases the scattering amount of the first type of regulating particles 105 on the direction parallel to the first surface, thereby improving the effect of the first type of regulating particles 105 on the chromaticity viewing angle and contrast of the optical film. The acute angle is greater than 0° and less than or equal to 20°, which is conducive to further improving the effect of the first type of regulating particles 105 on the chromaticity viewing angle and contrast of the optical film.

[0114] In some embodiments, the regulating particle 104 has a long axis and a diameter, the long axis length of the regulating particle 104 is the distance between the two end points of the long axis of the regulating particle 104, each regulating particle 104 has multiple cross sections in the extending direction perpendicular to the long axis of the regulating particle 104, each cross section has an inscribed circle, and the diameter of the regulating particle 104 corresponds to the diameter of the inscribed circle with the largest diameter among the multiple cross sections. The two points with the farthest distance in a cross section of the regulating particle 104 are located on the inscribed circle of the cross section, and the distance between the two points with the farthest distance in the cross section is the diameter of the inscribed circle.

[0115] In some embodiments, the regulating particles 104 include first-type regulating particles 105, which are beneficial to improving the chromaticity viewing angle and contrast of the optical film. The first-type regulating particles 105 have multiple first cross-sections, each of which has a first inscribed circle, the ratio of the major axis length of the first-type regulating particle 105 to the diameter of the first inscribed circle with the largest diameter among the multiple first inscribed circles is greater than or equal to 5, the ratio of the major axis length of the first-type regulating particle 105 to the diameter of the first inscribed circle with the largest diameter among the multiple first inscribed circles is less than 50, and the first cross-section is perpendicular to the extension direction of the major axis of the first-type regulating particle 105, for example, it can be 10, 12, 15, 16, 18, 20, 30, 32, 34, 35, 36, 38, 40, 42, 45, 46, 48, etc. The diameter of the first inscribed circle of one of the first cross-sections of the first-type regulating particles 105 is the diameter of the circle with the largest diameter in the first cross-section and tangent to the edge in the first cross-section. By using the first type of regulating particles 105 with a larger aspect ratio (the ratio of the major axis length to the diameter of the first inscribed circle with the largest diameter), it is easier to allow more light to change its propagation direction through the regulating particles 104, which is beneficial to obtaining the improvement effect of the regulating particles 104 on chromaticity, viewing angle and contrast.

[0116] In some embodiments, the first type of regulating particles 105 are selected from at least one of the first subtype regulating particles, the second subtype regulating particles, the third subtype regulating particles, the fourth subtype regulating particles, and the fifth subtype regulating particles, which have different shapes from each other;

[0117] Wherein, along the extension direction of the long axis of the first subclass regulating particles, the change value of the diameter of the first inscribed circle of the first cross section of the first subclass regulating particles is less than or equal to 0.3 micrometers, for example, it can be 0 micrometers, 0.28 micrometers, 0.25 micrometers, 0.22 micrometers, 0.2 micrometers, 0.18 micrometers, 0.15 micrometers, 0.12 micrometers, 0.1 micrometers, 0.08 micrometers, 0.05 micrometers, 0.02 micrometers, etc. In some embodiments, along the extension direction of the long axis of the first subclass regulating particles, the diameter of the first inscribed circle of the first cross section at the first end of the first subclass regulating particles is the same as the diameter of the first inscribed circle of the first cross section in the middle of the first subclass regulating particles, and the diameter of the first inscribed circle at the second end of the first subclass regulating particles is the same as the diameter of the first inscribed circle in the middle of the first subclass regulating particles.

[0118] In some embodiments, the first cross-section of the first subclass regulating particles can be a regular shape such as a circle, an ellipse, a triangle, a quadrilateral, or an irregular shape.

[0119] In some embodiments, the first subclass regulating particles may be rod-shaped particles. When the first subclass regulating particles are rod-shaped, the first cross-section of the first subclass regulating particles is circular or elliptical. When the first cross-section of the first subclass regulating particles is circular, the first inscribed circle of the first cross-section of the first subclass regulating particles may coincide with the first cross-section. When the first cross-section of the first subclass regulating particles is elliptical, the diameter of the first inscribed circle of each of the first cross-sections of the first subclass regulating particles is the length of the minor axis of the ellipse presented by each of the first cross-sections of the first subclass regulating particles, and the ratio of the major axis of the ellipse presented by one of the first cross-sections of the first subclass regulating particles to the minor axis of the ellipse presented by the first cross-section of the first subclass regulating particles is greater than 1 and less than or equal to 3, for example, it may be 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, etc.

[0120] Along the extension direction of the long axis of the second subclass regulating particles, the change value of the diameter of the first inscribed circle of the first cross-section located in the middle part of the second subclass regulating particles is less than or equal to 1 micron, for example, it can be 0 micron, 0.95 micron, 0.8 micron, 0.78 micron, 0.75 micron, 0.72 micron, 0.7 micron, 0.68 micron, 0.65 micron, 0.62 micron, 0.6 micron, 0.58 micron, 0.55 micron, 0.52 micron, 0.5 micron, 0.48 micron, 0.45 micron, 0.42 micron, 0.4 micron, 0.38 micron, 0.35 micron, 0.32 micron, 0.3 micron, 0.28 micron, 0.25 micron, 0.22 micron, 0.2 micron, 0.18 micron, 0.15 micron, 0.12 micron, 0.1 micron, 0.08 micron, 0.05 micron, 0.02 micron, etc. In the direction away from the middle part of the second subclass regulating particle, the diameter of the first inscribed circle of the first cross section at the first end of the second subclass regulating particle gradually decreases, and the diameter change value of the first inscribed circle of the first cross section at the second end of the second subclass regulating particle is less than or equal to 1 micron, for example, can be 0 micron, 0.95 micron, 0.8 micron, 0.78 micron, 0.75 micron, 0.72 micron, 0.7 micron, 0.68 micron, 0.65 micron, 0. . 0.6 micron, 0.58 micron, 0.55 micron, 0.52 micron, 0.5 micron, 0.48 micron, 0.45 micron, 0.42 micron, 0.4 micron, 0.38 micron, 0.35 micron, 0.32 micron, 0.3 micron, 0.28 micron, 0.25 micron, 0.22 micron, 0.2 micron, 0.18 micron, 0.15 micron, 0.12 micron, 0.1 micron, 0.08 micron, 0.05 micron, 0.02 micron, etc. In some embodiments, along the direction away from the middle part of the second subclass regulating particles, the diameter of the first inscribed circle of the first cross section at the first end of the second subclass regulating particles gradually decreases, and the diameter of the first inscribed circle of the first cross section at the second end of the second subclass regulating particles is the same as the diameter of the first inscribed circle of the first cross section at the middle part of the second subclass regulating particles.

[0121] It can be understood that, along the direction away from the middle part of the second subclass regulating particle, the diameter of the first inscribed circle of the first cross-section located at the first end of the second subclass regulating particle gradually decreases, indicating that in the direction away from the middle part of the second subclass regulating particle, the diameter of the first inscribed circle of the first cross-section located at the first end of the second subclass regulating particle shows a decreasing trend, including but not limited to, in the direction away from the middle part of the second subclass regulating particle, the diameter of the first inscribed circle of the first cross-section located at the first end of the second subclass regulating particle decreases successively.

[0122] In some embodiments, the first cross-section of the second subclass regulating particles can be a regular shape such as a circle, an ellipse, a triangle, a quadrilateral, or an irregular shape.

[0123] In some embodiments, the second subtype regulating particles may be needle-shaped particles with a reduced diameter at one end.

[0124] In some embodiments, when the second subclass regulating particle is a needle-shaped particle with a reduced diameter at one end, the first cross section of the second subclass regulating particle may be circular or elliptical, and when the first cross section at the second end of the second subclass regulating particle or the first cross section at the middle of the second subclass regulating particle is elliptical, the ratio of the major axis of the ellipse to the minor axis of the ellipse at any of the first cross sections at the second end or the middle of the second subclass regulating particle is greater than 1 and less than or equal to 3, for example, it may be 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, etc. The shape of the first cross section at the first end of the second subclass regulating particle is consistent with the shape of the first cross section at the middle of the second subclass regulating particle, and the area gradually decreases in the direction away from the middle of the second subclass regulating particle.

[0125] Along the extension direction of the long axis of the third subclass regulating particles, the change value of the diameter of the first inscribed circle of the first cross section located in the middle part of the third subclass regulating particles is less than or equal to 1 micron, for example, it can be 0 micron, 0.95 micron, 0.8 micron, 0.78 micron, 0.75 micron, 0.72 micron, 0.7 micron, 0.68 micron, 0.65 micron, 0.62 micron, 0.6 micron, 0.58 micron, 0.55 micron, 0.52 micron, 0.5 micron, 0.48 micron, 0.45 micron, 0.42 micron, 0.4 micron, 0. In some embodiments, the diameter of the first inscribed circle of the first cross section at the first end of the third subclass regulating particle gradually decreases along the direction away from the middle part of the third subclass regulating particle, and the diameter of the first inscribed circle of the first cross section at the second end of the third subclass regulating particle gradually decreases. In some embodiments, along the extension direction of the long axis of the third subclass regulating particle, the diameter of the first inscribed circle of the first cross section at the middle part of the third subclass regulating particle is uniform, and the diameters of the first inscribed circles of the first cross section at the first end of the third subclass regulating particle and the second end of the third subclass regulating particle gradually change.

[0126] It can be understood that, along the direction away from the middle part of the third subclass regulating particle, the diameter of the first inscribed circle of the first cross-section located at the first end of the third subclass regulating particle gradually decreases, indicating that in the direction away from the middle part of the third subclass regulating particle, the diameter of the first inscribed circle of the first cross-section located at the first end of the third subclass regulating particle shows a decreasing trend, including but not limited to in the direction away from the middle part of the third subclass regulating particle, the diameter of the first inscribed circle of the first cross-section located at the first end of the third subclass regulating particle decreases successively.

[0127] It can be understood that, along the direction away from the middle part of the third subclass regulating particle, the diameter of the first inscribed circle of the first cross-section located at the second end of the third subclass regulating particle gradually decreases, indicating that in the direction away from the middle part of the third subclass regulating particle, the diameter of the first inscribed circle of the first cross-section located at the second end of the third subclass regulating particle shows a decreasing trend, including but not limited to in the direction away from the middle part of the third subclass regulating particle, the diameter of the first inscribed circle of the first cross-section located at the second end of the third subclass regulating particle decreases successively.

[0128] In some embodiments, the first cross-section of the third subclass regulating particles can be a regular shape such as a circle, an ellipse, a triangle, a quadrilateral, or an irregular shape.

[0129] In some embodiments, the third subtype regulating particles may be needle-shaped particles with reduced diameters at both ends.

[0130] In some embodiments, when the third subclass regulating particle can be a needle-shaped particle with a reduced diameter at both ends, the shape of the first cross section of the third subclass regulating particle can be circular or elliptical. When the first cross section located in the middle of the third subclass regulating particle is elliptical, the ratio of the major axis of the ellipse presented by any first cross section located in the middle of the third subclass regulating particle to the minor axis of the ellipse is greater than 1 and less than or equal to 3, for example, it can be 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, etc. The shape of the first cross section located at the first end of the third subclass regulating particle and the second end of the third subclass regulating particle is consistent with the shape of the first cross section located in the middle of the third subclass regulating particle, and the area gradually decreases in the direction away from the middle of the third subclass regulating particle.

[0131] The first end of the fourth subclass regulating particle is connected to the second end of the fourth subclass regulating particle, and the diameter of the first inscribed circle of the first cross-section of the fourth subclass regulating particle gradually decreases along the direction from the first end of the fourth subclass regulating particle to the second end of the fourth subclass regulating particle.

[0132] It can be understood that, along the direction from the second end of the fourth subclass regulating particle to the second end of the fourth subclass regulating particle, the diameter of the first inscribed circle of the ninth cross-section of the fourth subclass regulating particle gradually decreases, indicating that in the direction from the first end of the fourth subclass regulating particle to the second end of the fourth subclass regulating particle, the diameter of the first inscribed circle of the first cross-section of the fourth subclass regulating particle shows a decreasing trend, including but not limited to the diameter of the first inscribed circle of the first cross-section of the fourth subclass regulating particle decreasing successively in the direction from the first end of the fourth subclass regulating particle to the second end of the fourth subclass regulating particle.

[0133] In some embodiments, the first cross-section of the fourth subclass regulating particles can be a regular shape such as a circle, an ellipse, a triangle, a quadrilateral, or an irregular shape.

[0134] In some embodiments, the fourth subclass of regulating particles can be long tapered particles.

[0135] In some embodiments, when the fourth subclass regulating particle is a long conical particle, the first cross section of the fourth subclass regulating particle is circular or elliptical. Along the direction from the first end of the fourth subclass regulating particle to the second end of the fourth subclass regulating particle, the shape of the first cross section of the fourth subclass regulating particle is consistent and the area gradually decreases. When the first cross section of the fourth subclass regulating particle is an ellipse, the ratio of the major axis of the ellipse presented by any first cross section of the fourth subclass regulating particle to the minor axis of the ellipse is greater than 1 and less than or equal to 3, for example, it can be 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, etc.

[0136] The first end of the fifth subclass regulating particle is connected to the second end of the fifth subclass regulating particle, and the diameter of the first inscribed circle of the first cross-section located at the first end of the fifth subclass regulating particle gradually decreases along the direction away from the second end of the fifth subclass regulating particle, and the diameter of the first inscribed circle of the first cross-section located at the second end of the fifth subclass regulating particle gradually decreases along the direction away from the first end of the fifth subclass regulating particle.

[0137] It can be understood that, along the direction away from the second end of the fifth subclass regulating particle, the diameter of the first inscribed circle of the first cross-section located at the first end of the fifth subclass regulating particle gradually decreases, indicating that in the direction away from the second end of the fifth subclass regulating particle, the diameter of the first inscribed circle of the first cross-section located at the first end of the fifth subclass regulating particle shows a decreasing trend, including but not limited to in the direction away from the second end of the fifth subclass regulating particle, the diameter of the first inscribed circle of the first cross-section located at the first end of the fifth subclass regulating particle decreases successively.

[0138] It can be understood that, along the direction away from the first end of the fifth subclass regulating particle, the diameter of the first inscribed circle of the first cross-section located at the second end of the fifth subclass regulating particle gradually decreases, indicating that in the direction away from the first end of the fifth subclass regulating particle, the diameter of the first inscribed circle of the first cross-section located at the second end of the fifth subclass regulating particle shows a decreasing trend, including but not limited to in the direction away from the first end of the fifth subclass regulating particle, the diameter of the first inscribed circle of the first cross-section located at the second end of the fifth subclass regulating particle decreases successively.

[0139] In some embodiments, the first cross-section of the fifth subclass regulating particles can be a regular shape such as a circle, an ellipse, a triangle, a quadrilateral, or an irregular shape.

[0140] In some embodiments, the fifth subclass of regulating particles can be biconical particles and / or ellipsoidal particles.

[0141] In some embodiments, when the fifth subclass regulating particle is a biconical particle and / or an ellipsoidal particle, the first cross section of the fifth subclass regulating particle is circular or elliptical. Along the direction away from the second end of the fifth subclass regulating particle, the shape of the first cross section at the first end of the fifth subclass regulating particle is consistent and the area gradually decreases; along the direction away from the first end of the fifth subclass regulating particle, the shape of the first cross section at the second end of the fifth subclass regulating particle is consistent and the area gradually decreases. When the first cross section of the fifth subclass regulating particle is an ellipse, the ratio of the major axis of the ellipse presented by any first cross section of the fifth subclass regulating particle to the minor axis of the ellipse is greater than 1 and less than or equal to 3, for example, it can be 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, etc.

[0142] The difference between the fifth subclass regulating particles being biconical particles and ellipsoidal particles is that when the fifth subclass regulating particles are biconical particles, the cross-section of the fifth subclass regulating particles in the direction parallel to the long axis of the fifth subclass regulating particles is a polygon such as a triangle or a quadrilateral; when the fifth subclass regulating particles are ellipsoidal particles, the cross-section of the fifth subclass regulating particles in the direction parallel to the long axis of the fifth subclass regulating particles is an ellipse.

[0143] In some embodiments, the long axis length of the first type of regulating particles 105 is less than or equal to 30 microns, for example, it can be 5 microns, 8 microns, 10 microns, 12 microns, 15 microns, 16 microns, 18 microns, 20 microns, 22 microns, 23 microns, 24 microns, 25 microns, 26 microns, 28 microns, etc., so that it can be dispersed in the first adhesive layer 107 while effectively improving the chromaticity viewing angle of the polarizer 100.

[0144] In some embodiments, the diameter of the first inscribed circle with the largest diameter among the plurality of the first inscribed circles of the first type regulating particles 105 is less than or equal to 5 micrometers, for example, it can be 0.5 micrometers, 1 micrometer, 1.5 micrometers, 2 micrometers, 2.5 micrometers, 3 micrometers, 3.5 micrometers, 4 micrometers, 4.5 micrometers, etc. Further, the diameter of the first inscribed circle with the largest diameter among the plurality of the first inscribed circles of the first type regulating particles 105 is greater than or equal to 1 micrometer.

[0145] In some embodiments, the regulating particles 104 include a second type of regulating particles 106 .

[0146] In some embodiments, the second type of regulating particle 106 has a plurality of second cross sections, each of which has a second inscribed circle, the ratio of the length of the major axis of the second type of regulating particle 106 to the diameter of the second inscribed circle with the largest diameter among the plurality of second inscribed circles is greater than or equal to 1, and the ratio of the length of the major axis of the second type of regulating particle 106 to the diameter of the second inscribed circle with the largest diameter among the plurality of second inscribed circles is less than 5, for example, it can be 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.2, 2.5, 2.8, 3, 3.5, 4, 4.5, etc., and the second cross section is perpendicular to the extension direction of the major axis of the first type of regulating particle 105. The diameter of the second inscribed circle of one of the second cross sections of the second type of regulating particle 106 is the diameter of the circle with the largest diameter in the second cross section and tangent to the edge. By making the regulating particles 104 include the second type regulating particles 106 with a smaller aspect ratio (ratio of the major axis length to the diameter of the second inscribed circle with the largest diameter), it is beneficial to improve the optical properties such as contrast of the polarizer 100.

[0147] In some embodiments, the second type of regulation particles 106 are selected from at least one of the sixth subtype of regulation particles, the seventh subtype of regulation particles, the eighth subtype of regulation particles, the ninth subtype of regulation particles, and the tenth subtype of regulation particles, which have different shapes.

[0148] Wherein, along the extension direction of the long axis of the sixth subclass regulating particle, the change value of the diameter of the second inscribed circle of the second cross section of the sixth subclass regulating particle is less than or equal to 0.3 micrometers, for example, it can be 0 micrometers, 0.28 micrometers, 0.25 micrometers, 0.22 micrometers, 0.2 micrometers, 0.18 micrometers, 0.15 micrometers, 0.12 micrometers, 0.1 micrometers, 0.08 micrometers, 0.05 micrometers, 0.02 micrometers, etc. In some embodiments, along the extension direction of the long axis of the sixth subclass regulating particle, the diameter of the second inscribed circle of the second cross section located at the first end of the sixth subclass regulating particle is the same as the diameter of the second inscribed circle of the second cross section located at the middle part of the sixth subclass regulating particle, and the diameter of the second inscribed circle of the second cross section located at the second end of the sixth subclass regulating particle is the same as the diameter of the second inscribed circle of the second cross section located at the middle part of the sixth subclass regulating particle.

[0149] In some embodiments, the second cross-section of the sixth subclass regulating particles can be a regular shape such as a circle, an ellipse, a triangle, a quadrilateral, or an irregular shape.

[0150] In some embodiments, the sixth subclass regulating particles are cubic particles or rectangular particles, the second cross-section of the sixth subclass regulating particles is a square or a rectangle, and the diameter of the second inscribed circle of any second cross-section of the sixth subclass regulating particles is the length of the side of the square or the length of the short side of the rectangle presented by the second cross-section.

[0151] The ratio of the major axis length of the sixth subclass regulating particle to the diameter of the second inscribed circle with the largest diameter among the multiple second cross-sections of the sixth subclass regulating particle is more preferably close to 1, for example, it can be 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.2, 2.5, 3, etc.

[0152] The first end of the seventh subclass regulating particle is connected to the second end of the seventh subclass regulating particle, and the diameter of the second inscribed circle of the second cross-section located at the first end of the seventh subclass regulating particle gradually decreases in the direction away from the second end of the seventh subclass regulating particle, and the diameter of the second inscribed circle of the second cross-section located at the second end of the seventh subclass regulating particle gradually decreases in the direction away from the first end of the seventh subclass regulating particle.

[0153] It can be understood that, along the direction away from the second end of the seventh subclass regulating particle, the diameter of the second inscribed circle of the second cross-section located at the first end of the seventh subclass regulating particle gradually decreases, indicating that in the direction away from the second end of the seventh subclass regulating particle, the diameter of the second inscribed circle of the second cross-section located at the first end of the seventh subclass regulating particle shows a decreasing trend, including but not limited to in the direction away from the second end of the seventh subclass regulating particle, the diameter of the second inscribed circle of the second cross-section located at the first end of the seventh subclass regulating particle decreases successively.

[0154] It can be understood that, along the direction away from the first end of the seventh subclass regulating particle, the diameter of the second inscribed circle of the second cross-section located at the second end of the seventh subclass regulating particle gradually decreases, indicating that in the direction away from the first end of the seventh subclass regulating particle, the diameter of the second inscribed circle of the second cross-section located at the second end of the seventh subclass regulating particle shows a decreasing trend, including but not limited to in the direction away from the first end of the seventh subclass regulating particle, the diameter of the second inscribed circle of the second cross-section located at the second end of the seventh subclass regulating particle decreases successively.

[0155] In some embodiments, the second cross-section of the seventh subclass regulating particles can be a regular shape such as a circle, an ellipse, a triangle, a quadrilateral, or an irregular shape.

[0156] In some embodiments, the seventh subclass regulating particle is a spherical particle or an ellipsoidal particle, and the second cross section of the seventh subclass regulating particle is circular or elliptical. When the second cross section of the seventh subclass regulating particle is elliptical, the ratio of the major axis of the ellipse presented by any second cross section of the seventh subclass regulating particle to the minor axis of the ellipse is greater than 1 and less than or equal to 3, for example, it can be 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, etc. When the seventh subclass regulating particle is a spherical particle, any second cross section of the seventh subclass regulating particle is circular and the second inscribed circle of any second cross section coincides with the second cross section, and the ratio of the minor axis of the seventh subclass regulating particle to the diameter of the second inscribed circle with the largest diameter among the multiple second cross sections of the seventh subclass regulating particle is 1.

[0157] The ratio of the major axis length of the seventh subclass regulating particle to the diameter of the second inscribed circle with the largest diameter among the multiple second inscribed circles of the seventh subclass regulating particle is preferably close to 1; when the seventh subclass regulating particle is an ellipsoidal particle, its shape is more preferably close to a spherical particle, that is, the closer the major axis length of the seventh subclass regulating particle is to the diameter of the seventh subclass regulating particle, the better. Preferably, the ratio of the major axis length of the seventh subclass regulating particle to the diameter of the second inscribed circle with the largest diameter among the multiple second inscribed circles of the seventh subclass regulating particle is greater than or equal to 1, and the ratio of the major axis length of the seventh subclass regulating particle to the diameter of the second inscribed circle with the largest diameter among the multiple second inscribed circles of the seventh subclass regulating particle is less than or equal to 3; more preferably, the ratio of the major axis length of the seventh subclass regulating particle to the diameter of the second inscribed circle with the largest diameter among the multiple second inscribed circles of the seventh subclass regulating particle is greater than or equal to 1, and the ratio of the major axis length of the seventh subclass regulating particle to the diameter of the second inscribed circle with the largest diameter among the multiple second inscribed circles of the seventh subclass regulating particle is less than or equal to 1.5.

[0158] Along the extension direction of the long axis of the eighth subclass regulating particles, the change value of the diameter of the second inscribed circle of the second cross-section located in the middle part of the eighth subclass regulating particles is less than or equal to 1 micron, for example, it can be 0 micron, 0.95 micron, 0.8 micron, 0.78 micron, 0.75 micron, 0.72 micron, 0.7 micron, 0.68 micron, 0.65 micron, 0.62 micron, 0.6 micron, 0.58 micron, 0.55 micron, 0.52 micron, 0.5 micron, 0.48 micron, 0.45 micron, 0.42 micron, 0.4 micron, 0.38 micron, 0.35 micron, 0.32 micron, 0.3 micron, 0.28 micron, 0.25 micron, 0.22 micron, 0.2 micron, 0.18 micron, 0.15 micron, 0.12 micron, 0.1 micron, 0.08 micron, 0.05 micron, 0.02 micron, etc. Along the direction away from the middle part of the eighth subclass regulating particle, the diameter of the second inscribed circle of the second cross section at the first end of the eighth subclass regulating particle gradually decreases, and the diameter change value of the first inscribed circle of the second cross section at the second end of the eighth subclass regulating particle is less than or equal to 1 micron, for example, can be 0 micron, 0.95 micron, 0.8 micron, 0.78 micron, 0.75 micron, 0.72 micron, 0.7 micron, 0.68 micron, 0.65 micron, 0. 62 microns, 0.6 microns, 0.58 microns, 0.55 microns, 0.52 microns, 0.5 microns, 0.48 microns, 0.45 microns, 0.42 microns, 0.4 microns, 0.38 microns, 0.35 microns, 0.32 microns, 0.3 microns, 0.28 microns, 0.25 microns, 0.22 microns, 0.2 microns, 0.18 microns, 0.15 microns, 0.12 microns, 0.1 microns, 0.08 microns, 0.05 microns, 0.02 microns, etc. In some embodiments, along the direction away from the middle part of the eighth subclass regulating particles, the diameter of the second inscribed circle of the second cross section at the first end of the eighth subclass regulating particles gradually decreases, and the diameter of the second inscribed circle of the second cross section at the second end of the eighth subclass regulating particles is the same as the diameter of the second inscribed circle of the second cross section at the middle part of the eighth subclass regulating particles.

[0159] It can be understood that, along the direction away from the middle part of the eighth subclass regulating particle, the diameter of the second inscribed circle of the second cross-section located at the first end of the eighth subclass regulating particle gradually decreases, indicating that in the direction away from the middle part of the eighth subclass regulating particle, the diameter of the second inscribed circle of the second cross-section located at the first end of the eighth subclass regulating particle shows a decreasing trend, including but not limited to in the direction away from the middle part of the eighth subclass regulating particle, the diameter of the second inscribed circle of the second cross-section located at the first end of the eighth subclass regulating particle decreases successively.

[0160] In some embodiments, the second cross-section of the eighth subclass regulating particles can be a regular shape such as a circle, an ellipse, a triangle, a quadrilateral, or an irregular shape.

[0161] In some embodiments, the eighth subtype of regulating particles can be needle-shaped particles with a reduced diameter at one end.

[0162] In some embodiments, when the eighth subclass regulating particle is a needle-shaped particle with a reduced diameter at one end, the second cross section of the eighth subclass regulating particle may be circular or elliptical, and when the second cross section at the second end of the eighth subclass regulating particle or the second cross section at the middle of the eighth subclass regulating particle is elliptical, the ratio of the major axis of the ellipse to the minor axis of the ellipse at any second cross section at the second end or middle of the eighth subclass regulating particle is greater than 1 and less than or equal to 3, for example, it may be 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, etc. The shape of the second cross section at the first end of the eighth subclass regulating particle is consistent with the shape of the second cross section at the middle of the eighth subclass regulating particle, and the area gradually decreases in the direction away from the middle of the eighth subclass regulating particle.

[0163] Along the extension direction of the long axis of the ninth subclass regulating particle, the change value of the diameter of the second inscribed circle of the second cross section located in the middle part of the ninth subclass regulating particle is less than or equal to 1 micron, for example, it can be 0 micron, 0.95 micron, 0.8 micron, 0.78 micron, 0.75 micron, 0.72 micron, 0.7 micron, 0.68 micron, 0.65 micron, 0.62 micron, 0.6 micron, 0.58 micron, 0.55 micron, 0.52 micron, 0.5 micron, 0.48 micron, 0.45 micron, 0.42 micron, 0.4 micron, 0. 38 microns, 0.35 microns, 0.32 microns, 0.3 microns, 0.28 microns, 0.25 microns, 0.22 microns, 0.2 microns, 0.18 microns, 0.15 microns, 0.12 microns, 0.1 microns, 0.08 microns, 0.05 microns, 0.02 microns, etc.; along the direction away from the middle part of the ninth subclass regulating particle, the diameter of the second inscribed circle of the second cross section at the first end of the ninth subclass regulating particle gradually decreases, and the diameter of the second inscribed circle of the second cross section at the second end of the ninth subclass regulating particle gradually decreases. In some embodiments, along the extension direction of the long axis of the ninth subclass regulating particle, the diameter of the second inscribed circle of the second cross section at the middle part of the ninth subclass regulating particle is uniform, and the diameters of the second inscribed circles of the second cross sections at the first end of the ninth subclass regulating particle and the second end of the ninth subclass regulating particle gradually change.

[0164] It can be understood that, along the direction away from the middle part of the ninth subclass regulating particle, the diameter of the second inscribed circle of the second cross-section located at the first end of the ninth subclass regulating particle gradually decreases, indicating that in the direction away from the middle part of the ninth subclass regulating particle, the diameter of the second inscribed circle of the second cross-section located at the first end of the ninth subclass regulating particle shows a decreasing trend, including but not limited to, in the direction away from the middle part of the ninth subclass regulating particle, the diameter of the second inscribed circle of the second cross-section located at the first end of the ninth subclass regulating particle decreases successively.

[0165] It can be understood that, along the direction away from the middle part of the ninth subclass regulating particle, the diameter of the second inscribed circle of the second cross-section located at the second end of the ninth subclass regulating particle gradually decreases, indicating that in the direction away from the middle part of the ninth subclass regulating particle, the diameter of the second inscribed circle of the second cross-section located at the second end of the ninth subclass regulating particle shows a decreasing trend, including but not limited to, in the direction away from the middle part of the ninth subclass regulating particle, the diameter of the second inscribed circle of the second cross-section located at the second end of the ninth subclass regulating particle decreases successively.

[0166] In some embodiments, the second cross-section of the ninth subclass regulating particles can be a regular shape such as a circle, an ellipse, a triangle, a quadrilateral, or an irregular shape.

[0167] In some embodiments, the ninth subtype of regulating particles may be needle-shaped particles with reduced diameters at both ends.

[0168] In some embodiments, when the ninth subclass regulating particle can be a needle-shaped particle with a reduced diameter at both ends, the shape of the second cross section of the ninth subclass regulating particle can be circular or elliptical. When the second cross section located in the middle of the ninth subclass regulating particle is elliptical, the ratio of the major axis of the ellipse presented by any second cross section located in the middle of the ninth subclass regulating particle to the minor axis of the ellipse is greater than 1 and less than or equal to 3, for example, it can be 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, etc. The shape of the second cross section located at the first end of the ninth subclass regulating particle and the second end of the ninth subclass regulating particle is consistent with the shape of the second cross section located in the middle of the ninth subclass regulating particle, and the area gradually decreases in the direction away from the middle of the ninth subclass regulating particle.

[0169] The first end of the tenth subclass regulating particle is connected to the second end of the tenth subclass regulating particle, and the diameter of the second inscribed circle of the second cross-section of the tenth subclass regulating particle gradually decreases along the direction from the first end of the tenth subclass regulating particle to the second end of the tenth subclass regulating particle.

[0170] It can be understood that, along the direction from the first end of the tenth subclass regulating particle to the second end of the tenth subclass regulating particle, the diameter of the second inscribed circle of the second cross-section of the tenth subclass regulating particle gradually decreases, indicating that in the direction from the first end of the tenth subclass regulating particle to the second end of the tenth subclass regulating particle, the diameter of the second inscribed circle of the second cross-section of the tenth subclass regulating particle shows a decreasing trend, including but not limited to, in the direction from the first end of the tenth subclass regulating particle to the second end of the tenth subclass regulating particle, the diameter of the second inscribed circle of the second cross-section of the tenth subclass regulating particle decreases successively.

[0171] In some embodiments, the second cross-section of the tenth subclass of regulating particles can be a regular shape such as a circle, an ellipse, a triangle, a quadrilateral, or an irregular shape.

[0172] In some embodiments, the tenth subclass of regulating particles can be long conical particles.

[0173] In some embodiments, when the tenth subclass regulating particle is a long conical particle, the second cross section of the tenth subclass regulating particle is circular or elliptical. Along the direction from the first end of the tenth subclass regulating particle to the second end of the tenth subclass regulating particle, the shape of the second cross section of the tenth subclass regulating particle is consistent and the area gradually decreases. When the second cross section of the tenth subclass regulating particle is an ellipse, the ratio of the major axis of the ellipse presented by any second cross section of the tenth subclass regulating particle to the minor axis of the ellipse is greater than 1 and less than or equal to 3, for example, it can be 1.2, 1.5, 1.8, 2, 2.2, 2.5, 2.8, etc.

[0174] In some embodiments, the sixth subclass regulating particles and the seventh subclass regulating particles have a better effect on improving the optical properties of the polarizer 100 than the eighth subclass regulating particles, the ninth subclass regulating particles, and the tenth subclass regulating particles. Therefore, preferably, the regulating particles 104 include the sixth subclass regulating particles and / or the seventh subclass regulating particles. Further preferably, the second class regulating particles 106 are composed of the seventh subclass regulating particles and / or the sixth subclass regulating particles.

[0175] In some embodiments, the major axis length of the second type of regulating particles 106 is less than or equal to 30 microns, for example, it can be 1 micron, 1.5 microns, 2 microns, 2.5 microns, 3 microns, 3.5 microns, 4 microns, 4.5 microns, 5 microns, 8 microns, 10 microns, 12 microns, 15 microns, 16 microns, 18 microns, 20 microns, 22 microns, 23 microns, 24 microns, 25 microns, 26 microns, 28 microns, etc., so that they can be dispersed in the first adhesive layer 107 while effectively improving the chromaticity viewing angle of the polarizer 100.

[0176] In some embodiments, the diameter of the second inscribed circle with the largest diameter among the plurality of the second inscribed circles of the second type regulating particles 106 is less than or equal to 5 micrometers, for example, it can be 0.5 micrometers, 1 micrometer, 1.5 micrometers, 2 micrometers, 2.5 micrometers, 3 micrometers, 3.5 micrometers, 4 micrometers, 4.5 micrometers, etc. Further, the diameter of the second inscribed circle with the largest diameter among the plurality of the second inscribed circles of the second type regulating particles 106 is greater than or equal to 1 micrometer.

[0177] In some embodiments, the regulating particles 104 include the first type regulating particles 105 and the second type regulating particles 106 , which are beneficial to improving the chromaticity viewing angle and contrast improvement effect of the optical film, and improving the display quality of the display device having the polarizer 100 .

[0178] In some embodiments, the first type of regulating particles 105 is selected from at least two of the first sub-type regulating particles, the second sub-type regulating particles, the third sub-type regulating particles, the fourth sub-type regulating particles, and the fifth sub-type regulating particles. The first type of regulating particles 105 is a mixture of the first sub-type regulating particles, the second sub-type regulating particles, and the third sub-type regulating particles, or the first type of regulating particles 105 is a mixture of the first sub-type regulating particles, the fourth sub-type regulating particles, and the fifth sub-type regulating particles, or the first type of regulating particles 105 is a mixture of the first sub-type regulating particles, the second sub-type regulating particles, the third sub-type regulating particles, the fourth sub-type regulating particles, and the fifth sub-type regulating particles. By selecting the first type of regulating particles 105 from at least two particles with different shapes, the diversity of the shapes of the first type of regulating particles 105 is increased, the optical anisotropy of the first type of regulating particles 105 is increased, and it is helpful to improve the contrast and brightness enhancement effect of the first type of regulating particles 105. The first type of regulating particles 105 is selected from the first subtype regulating particles, the second subtype regulating particles and the third subtype regulating particles, or the first type of regulating particles 105 is selected from the first subtype regulating particles, the fourth subtype regulating particles and the fifth subtype regulating particles, or the first type of regulating particles 105 is a mixture of the first subtype regulating particles, the second subtype regulating particles, the third subtype regulating particles, the fourth subtype regulating particles and the fifth subtype regulating particles, the mass fraction of the first subtype regulating particles in the first type of regulating particles 105 is 1% to 8%, for example, can be 1.5%, 2%, 2.5%, 3 %, 3.5%, 4%, 4.5%, 5%, 6%, 6.5%, 7%, 7.5%, etc.; the mass fraction of the second subclass regulating particles and / or the fourth subclass regulating particles in the first class regulating particles 105 is 40% to 50%, for example, it can be 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, etc.; the mass fraction of the third subclass regulating particles and / or the fifth subclass regulating particles in the first class regulating particles 105 is 45% to 55%, for example, it can be 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, etc. The mixing of the first subclass regulating particles, the second subclass regulating particles and / or the fourth subclass regulating particles, the third subclass regulating particles and / or the fifth subclass regulating particles in the above proportions is helpful to further improve the contrast and brightness enhancement effect of the obtained regulating particles 104.

[0179] In some embodiments, the mass fraction of the regulating particles 104 in the adhesive layer 103 is less than or equal to 20%, for example, it can be 0.0001%, 0.001%, 0.01%, 0.02%, 0.05%, 0.1%, 0.5%, 1%, 5%, 8%, 10%, 12%, 15%, 18%, etc., so as to facilitate dispersion in the adhesive layer 103 and improve the display quality of the display device having the polarizer 100. The regulating particles 104 have a smaller mass fraction in the adhesive layer 103 to effectively improve the optical performance of the polarizer 100 in terms of chromaticity, viewing angle and contrast, and the smaller the mass fraction, the better the dispersibility. Preferably, the mass fraction of the regulating particles 104 in the first adhesive layer 107 is less than or equal to 10%; more preferably, the mass fraction of the regulating particles 104 in the adhesive layer 103 is less than or equal to 5%; more preferably, the mass fraction of the regulating particles 104 in the adhesive layer 103 is less than or equal to 1%; and more preferably, the mass fraction of the regulating particles 104 in the adhesive layer 103 is less than or equal to 0.05%. At the same time, in order to ensure that the amount of the regulating particles 104 in the adhesive layer 103 is sufficient to effectively improve the optical properties of the polarizer 100, the mass fraction of the regulating particles 104 in the adhesive layer 103 can be greater than or equal to 0.001%, preferably greater than or equal to 0.003%, more preferably greater than or equal to 0.005%, more preferably greater than or equal to 0.015%, and more preferably greater than or equal to 0.03%.

[0180] In some embodiments, the difference in refractive index between the adhesive layer 103 and the regulating particles 104 is greater than or equal to 0.02, for example, it can be 0.03, 0.05, 0.09, 0.1, 0.15, 0.2, etc., so that the regulating particles 104 can achieve a light diffusion function and further improve the optical properties of the polarizer 100. Preferably, the difference in refractive index between the adhesive layer 103 and the regulating particles 104 is greater than or equal to 0.1, for example, it can be 0.12, 0.13, 0.14, 0.15, 0.2, etc. For example, when the regulating particles 104 are dispersed in the first bonding sublayer 110, the difference in refractive index between the regulating particles 104 and the first bonding sublayer 110 is greater than or equal to 0.02, and further, the difference in refractive index between the regulating particles 104 and the first bonding sublayer 110 is greater than or equal to 0.1; when the regulating particles 104 are also dispersed in the third bonding sublayer 112, the difference in refractive index between the regulating particles 104 and the third bonding sublayer 112 is greater than or equal to 0.02, and further, the difference in refractive index between the regulating particles 104 and the third bonding sublayer 112 is greater than or equal to 0.1; when the regulating particles 104 are dispersed in the second bonding sublayer 111, the difference in refractive index between the regulating particles 104 and the second bonding sublayer 111 is greater than or equal to 0.02, and further In one step, the difference in refractive index between the regulating particles 104 and the second bonding sublayer 111 is greater than or equal to 0.1; when the regulating particles 104 are also dispersed in the fourth bonding sublayer 113, the difference in refractive index between the regulating particles 104 and the fourth bonding sublayer 113 is greater than or equal to 0.02, and further, the difference in refractive index between the regulating particles 104 and the fourth bonding sublayer 113 is greater than or equal to 0.1; when the regulating particles 104 are also dispersed in the bonding sublayer between the first bonding sublayer 110 and the third bonding sublayer 112 (such as the seventh bonding sublayer), the difference in refractive index between the regulating particles 104 and at least one bonding sublayer between the first bonding sublayer 110 and the third bonding sublayer 112 is greater than or equal to 0.02, and further, greater than or equal to 0.1.

[0181] In some embodiments, the first type of regulating particles 105 are whiskers. The material of the second type of regulating particles 106 and the material of the first type of regulating particles 105 are selected from at least one of PS polystyrene, polyethylene, polypropylene, silicon dioxide, zirconium oxide, magnesium carbonate, magnesium sulfate, barium carbonate, barium sulfate, silicon carbide, silicon nitride, zinc oxide, magnesium oxide, aluminum oxide, calcium sulfate, calcium carbonate, potassium titanate, and aluminum borate.

[0182] In some embodiments, the first type of regulating particles 105 and / or the second type of regulating particles 106 may be surface modified to facilitate the dispersibility of the first type of regulating particles 105 and / or the second type of regulating particles 106 in the first adhesive layer 107, or to enhance the toughness and other functionalities of the first type of regulating particles 105 and / or the second type of regulating particles 106. When the first type of regulating particles 105 and / or the second type of regulating particles 106 are surface modified, the surface of the first type of regulating particles 105 and / or the second type of regulating particles 106 is modified by at least one of inorganic cations, inorganic anions, polymers, coupling agents or surfactants, that is, the surface of the first type of regulating particles 105 and / or the second type of regulating particles 106 includes at least one of inorganic cation groups, inorganic anion groups, polymer groups, coupling agent groups or surfactant groups.

[0183] Specifically, the surfaces of the first type of regulating particles 105 and / or the second type of regulating particles 106 are modified by at least one selected from magnesium chloride, calcium chloride, barium chloride, strontium chloride, stearic acid, sodium stearate, zinc octadecanoate, sulfonic acid surfactants, thio surfactants, titanates, aluminates, polyacrylamide, silane, alkyl phosphates, aryl phosphates, alkyl phosphates, aryl phosphates, alkyl alcohol amide phosphates, alkyl alcohol amide phosphates, imidazoline phosphates, imidazoline phosphates, high polyphosphates, high polyphosphates, and siloxane phosphates. Preferably, the surfaces of the first type of regulating particles 105 and / or the second type of regulating particles 106 are modified by at least one of sulfonic acid surfactants or thio surfactants. The sulfonic acid surfactant can be selected from at least one of alkyl sulfonates and fluoroalkyl sulfonates, specifically, such as at least one of sodium dodecyl sulfonate, sodium dodecylbenzene sulfonate, and sodium fluorododecyl sulfonate; the thio surfactant can be selected from at least one of thiols and fluorothiols, specifically, such as at least one of octyl mercaptan, dodecanethiol, tetradecanethiol, octadecanethiol, fluorooctyl mercaptan, and fluorododecyl mercaptan. When the sulfonic acid surfactant is mixed with the regulating particles 104 to be surface-modified, the sulfonic acid surfactant groups form a sulfonic acid shell layer on the whisker surface, such as a benzene ring sulfonic acid shell layer, which is beneficial to protecting the regulating particles 104, enhancing the toughness of the regulating particles 104, and reducing the breakage of the first type regulating particles 105 and / or the second type regulating particles 106 in the optical film; when the sulfo-type surfactant groups are mixed with the regulating particles 104 to be surface-modified, the sulfo-type surfactant groups and the hydroxyl groups on the whisker surface form an OSO cross-linked network, and the bond energy of OSO is relatively large, which is beneficial to protecting the first type regulating particles 105 and / or the second type regulating particles 106 in the process of mixing the first type regulating particles 105 and / or the second type regulating particles 106 with the materials of the first adhesive layer 107 and forming the first adhesive layer 107, reducing the breakage of the first type regulating particles 105 and / or the second type regulating particles 106, and improving the improvement effect of the first type regulating particles 105 and / or the second type regulating particles 106 on optical functions such as contrast and brightness. More preferably, the first type of regulating particles 105 and / or the second type of regulating particles 106 are treated with at least one of a sulfonic acid surfactant containing a fluorine-containing substituent and a thio surfactant containing a fluorine-containing substituent, specifically, such as at least one of sodium fluorododecyl sulfonate, fluorooctanethiol, and fluorododecyl mercaptan, wherein the fluorine atom has high stability in the alkyl chain, the bond energy of the carbon-fluorine bond is higher than the bond energy of the carbon-carbon bond, and the carbon-fluorine bond has a shielding effect on the carbon-carbon bond, which is beneficial to protecting the carbon-carbon bond, thereby improving the stability of the first type of regulating particles 105 and / or the second type of regulating particles 106.

[0184] In some embodiments, the polarizing layer 101 may be composed of polyvinyl alcohol and dye.

[0185] In some embodiments, the material of the first protective layer 102 and / or the second protective layer 108 is selected from at least one of modified or unmodified polyester and modified or unmodified cellulose acetate.

[0186] In some embodiments, the modified or unmodified polyester may include at least one of modified or unmodified polyethylene terephthalate, modified or unmodified polycarbonate, modified or unmodified polymethyl methacrylate, and modified or unmodified polyethylene naphthalate. The modified or unmodified cellulose acetate may include modified or unmodified cellulose triacetate.

[0187] In some embodiments, the first protective layer 102 and / or the second protective layer 108 may include a first sub-substrate and / or a second sub-substrate, and the first sub-substrate may be selected from at least one of unmodified polyester and unmodified cellulose acetate. The second sub-substrate may be selected from at least one of modified polyester and modified cellulose acetate. In the first protective layer 102 and / or the second protective layer 108, the mass fraction of the first sub-substrate is greater than the mass fraction of the second sub-substrate.

[0188] In some embodiments, the first sub-substrate and the second sub-substrate are uniformly mixed with each other, and the mass fraction of the first sub-substrate in the first protective layer 102 is greater than or equal to 65%, for example, it can be 70%, 75%, 80%, 85%, 90%, 95%, 99%, etc. The mass fraction of the second sub-substrate in the substrate is less than or equal to 35%, for example, it can be 1%, 5%, 10%, 15%, 20%, 25%, 30%, etc. It is beneficial that the modified polyester such as polyethylene terephthalate has good mutual solubility with the unmodified polyester such as polyethylene terephthalate or the modified cellulose acetate has good mutual solubility with the unmodified cellulose acetate such as triacetate cellulose, which helps to improve the mechanical properties, flatness and crystallinity of the first protective layer 102.

[0189] In some embodiments, the modified triacetyl cellulose, modified polyethylene terephthalate, modified polycarbonate, modified polymethyl methacrylate or modified polyethylene naphthalate can be obtained by respectively modifying the unmodified triacetyl cellulose, unmodified polyethylene terephthalate, unmodified polycarbonate, unmodified polymethyl methacrylate or unmodified polyethylene naphthalate to be hydrophilic or lipophilic. For example, the modified polyethylene terephthalate can be obtained by introducing a linear alkyl side chain, a carboxyl side chain, a hydroxyl side chain or a fluorine-containing group into the unmodified polyethylene terephthalate; when the modified polyethylene terephthalate can be obtained by introducing a carboxyl side chain and / or a hydroxyl side chain into the unmodified polyethylene terephthalate, the modified polyethylene terephthalate can be obtained by introducing a phenyl group of the unmodified polyethylene terephthalate into the phenyl group of the unmodified polyethylene terephthalate. A group, wherein n and m are both integers greater than or equal to 0 and less than or equal to 10.

[0190] In some embodiments, when the first sub-substrate is selected from unmodified polyethylene terephthalate, the second sub-substrate is selected from modified polyethylene terephthalate, which is beneficial to the good miscibility between the modified polyethylene terephthalate and the unmodified polyethylene terephthalate, and helps to improve the mechanical properties, flatness, and crystallinity of the first protective layer 102 and / or the second protective layer 108.

[0191] Please refer to the figure Figures 4 to 12 In some embodiments, the polarizer 100 further includes a first optical functional layer 116 located on one side of the first protective layer 102. The first optical functional layer 116 is located on a side of the first protective layer 102 away from the polarizing layer 101.

[0192] In some embodiments, the first optical functional layer 116 includes an anti-glare sublayer, a transparent hardening sublayer 117 (such as Figures 4 to 7 As shown), at least one of a low reflection sublayer 118, an anti-reflection sublayer, an anti-fingerprint sublayer, and an anti-static electron layer. Figures 8 to 12 When the first optical function layer 116 is a low-reflection sub-layer 118 , the low-reflection sub-layer 118 may be formed by stacking a transparent hardening sub-part 119 and a low-refractive sub-part 120 .

[0193] See also Figures 1 to 3 In some embodiments, the polarizer further includes a first release layer 121 located on a side of the first protective layer away from the polarizing layer, and the first release layer is bonded to the first protective layer through a first adhesive layer. When the polarizer 100 forms the first optical functional layer 116, the first release layer 121 is removed.

[0194] See also Figure 5 In some embodiments, the polarizer 100 further includes a second release layer 122 located on a side of the polarizing layer 101 away from the first protective layer 102, and the second release layer 122 is bonded to the polarizing layer 101 via a second adhesive layer. When the polarizer 100 is applied to the display device, the second release layer 122 is removed to expose the second adhesive layer, so that the polarizer 100 is bonded to the display panel via the second adhesive layer.

[0195] See also Figures 1 to 12 In some embodiments, the polarizer 100 further includes a compensation layer 123 located between the second adhesive layer and the polarizing layer 101 .

[0196] The polarizer 100 provided in the embodiment of the utility model improves the chromaticity viewing angle and contrast of the polarizer by distributing the regulating particles 104 in the adhesive layer 103 between the polarizing layer 101 and the first protective layer 102, thereby enhancing the display quality of the display device having the optical film.

[0197] See also Fig.13 The embodiment of the utility model further provides a display device 10, comprising the polarizer 100 as described above.

[0198] Specifically, the display device includes a display panel 200 and a first polarizer 300 . The first polarizer 300 is located at a light-emitting side of the display panel 200 . The first polarizer 300 is selected from the polarizer 100 described above.

[0199] In some embodiments, the display panel 200 may be a liquid crystal display panel, a self-luminous display panel, etc. The self-luminous display panel may be an OLED (Orgnic Light-Emitting Diode) display panel, etc.

[0200] In some embodiments, the optical film in the first polarizer 300 is located on a side of the polarizing layer 101 in the first polarizer 300 away from the display panel.

[0201] When the display panel 200 is a liquid crystal display panel, the display device 10 further includes a backlight module 400 located at a side of the display panel 200 away from the first polarizer 300, and the backlight module 400 is used to provide a light source for the display panel 200; the display device 10 further includes a second polarizer 500 located between the backlight module 400 and the display panel 200. The second polarizer 500 may be selected from the polarizer 100 described above, or the second polarizer 500 may not be selected from the polarizer 100 described above.

[0202] Next, the present invention will be described in more detail with reference to some embodiments. However, it should be noted that these examples are provided for illustration only and should not be understood in any way as limiting the present invention.

[0203] Example 1

[0204] In this embodiment, the first adhesive sublayer and the third adhesive sublayer in the first adhesive layer are made of commercially available pressure-sensitive adhesive materials. The regulating particles 104 in the first adhesive sublayer and the third adhesive sublayer are rod-shaped calcium carbonate. The regulating particles are respectively dispersed in the first adhesive sublayer with a thickness of 25 microns and the third adhesive sublayer with a thickness of 5 microns to form an adhesive layer 1. The mass fraction of the regulating particles in the adhesive layer 1 is 7%.

[0205] Example 2

[0206] This embodiment is the same as or similar to the embodiment 1, except that the first bonding sublayer contains regulating particles and the third bonding sublayer contains no regulating particles, so as to form a bonding layer 2.

[0207] Example 3

[0208] This embodiment is the same as or similar to Embodiment 1, except that the first adhesive layer is composed of a first adhesive sublayer, the thickness of the first adhesive sublayer is 30 micrometers, and an adhesive layer 3 is formed.

[0209] Example 4

[0210] This embodiment is similar to embodiment 1, except that the first bonding layer also has a fifth bonding sublayer, the material of the fifth bonding sublayer is commercially available UV light curing glue, the thickness of the fifth bonding sublayer is 1 micron, and the thickness of the third bonding sublayer is 4 microns, forming a bonding layer 4.

[0211] Example 5

[0212] This embodiment is similar to embodiment 4, except that the shape of the particles is adjusted to be cubic to form an adhesive layer 5 .

[0213] Example 6

[0214] This embodiment is similar to embodiment 4, except that the shape of the particles is adjusted to be spherical to form an adhesive layer 6 .

[0215] Example 7

[0216] This embodiment is similar to Embodiment 3, except that the material of the first adhesive sublayer is commercially available UV-curable adhesive, and the thickness of the first adhesive sublayer is 2 microns, forming an adhesive layer 7 .

[0217] Comparative Example 1

[0218] This embodiment is similar to embodiment 4, except that there are no regulating particles in the first adhesive layer.

[0219] The adhesive layers obtained in Examples 1 to 7 and the comparative adhesive layer 1 obtained in Comparative Example 1 were arranged between the polarizer and the first protective layer, and the polarizer was attached to the surface of a 75-inch liquid crystal display panel for further optical effect testing, and the results are shown in Table 2. The polarizer to be tested includes a compensation layer, a polarizing layer, an adhesive layer, a first protective layer, and a transparent hardened sublayer which are stacked in sequence.

[0220] The contrast ratio is the ratio of the brightness of the display panel at a 60-degree viewing angle in the dark state to the brightness of the center of the panel in the dark state (the brightness of the center of the panel in the dark state is 1).

[0221] The chromaticity viewing angle measurement is performed according to the CESI standard (CESI 0.03).

[0222] Table 2

[0223] Contrast Chromaticity viewing angle° Adhesive layer 1 1.9 165 Adhesive layer 2 1.9 170 Adhesive layer 3 2.2 153 Adhesive layer 4 1.9 168 Adhesive layer 5 2.1 140 Adhesive layer 6 2.1 142 Adhesive layer 7 3.5 84 Comparative adhesive layer 1 4.2 92

[0224] It can be seen from Table 2 that by arranging the regulating particles in the adhesive layer, the contrast of the polarizer is significantly improved, and when the adhesive sublayer on which the regulating particles are distributed adopts a pressure-sensitive adhesive material, the chromaticity and viewing angle are also significantly improved; at the same time, compared with the use of cubic regulating particles and spherical regulating particles with a relatively small aspect ratio, the use of rod-shaped particles with a larger aspect ratio has a more obvious effect on improving the optical performance of the polarizer in terms of contrast, chromaticity and viewing angle; in addition, compared with dispersing the regulating particles in a single-layer adhesive sublayer using a pressure-sensitive adhesive as a material, when the total thickness of the adhesive sublayer using the pressure-sensitive adhesive as a material is the same, when the regulating particles are dispersed in a multi-layer adhesive sublayer using a pressure-sensitive adhesive as a material, the optical performance improvement effect on the contrast, chromaticity and viewing angle of the polarizer is more obvious.

[0225] The utility model embodiment discloses a.

[0226] The polarizer and display device provided by the embodiments of the present invention are introduced in detail above. The principles and implementation methods of the present invention are described in detail using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A polarizer, characterized in that: include: Polarizing layer; A first protective layer, located on one side of the polarizing layer; an adhesive layer, located between the polarizing layer and the first protective layer; regulating particles, the regulating particles being dispersed in the adhesive layer; Wherein, the regulating particles include: The first type of regulating particles has a plurality of first cross sections, each of the first cross sections has a first inscribed circle, the ratio of the major axis length of the first type of regulating particles to the diameter of the first inscribed circle with the largest diameter among the plurality of first inscribed circles is greater than or equal to 5, and the ratio of the major axis length of the first type of regulating particles to the diameter of the first inscribed circle with the largest diameter among the plurality of first inscribed circles is less than or equal to 50; and / or The second type of regulating particles has multiple second cross-sections, each of the second cross-sections has a second inscribed circle, the ratio of the major axis length of the second type of regulating particles to the diameter of the second inscribed circle with the largest diameter among the multiple second inscribed circles is greater than or equal to 1, and the ratio of the major axis length of the second type of regulating particles to the diameter of the second inscribed circle with the largest diameter among the multiple second inscribed circles is less than 5.

2. The polarizer according to claim 1, characterized in that: The adhesive layer includes a first adhesive layer, the first adhesive layer is adhered between the first protective layer and the polarizing layer, and the regulating particles are dispersed in the first adhesive layer; or The polarizer also includes a second protective layer, which is located between the first protective layer and the polarizing layer. The adhesive layer also includes a second adhesive layer, the first adhesive layer is bonded between the second protective layer and the polarizing layer, and the second adhesive layer is bonded between the first protective layer and the second protective layer. The regulating particles are dispersed in the first adhesive layer and / or the second adhesive layer.

3. The polarizer according to claim 2, characterized in that: The first adhesive layer includes a first adhesive sublayer, and the regulating particles are dispersed in at least the first adhesive sublayer in the first adhesive layer; and / or, The second adhesive layer further includes a second adhesive sublayer, and the regulating particles are dispersed in at least the second adhesive sublayer in the second adhesive layer.

4. The polarizer according to claim 3, characterized in that: The first adhesive layer further includes a third adhesive sublayer, the third adhesive sublayer is located on a side of the first adhesive sublayer close to the polarizing layer, and the regulating particles are dispersed in the first adhesive sublayer and the third adhesive sublayer in the first adhesive layer; and / or, The second adhesive layer further includes a fourth adhesive sublayer, which is located on a side of the second adhesive sublayer close to the polarizing layer, and the regulating particles are dispersed in the second adhesive sublayer and the fourth adhesive sublayer in the second adhesive layer.

5. The polarizer according to claim 4, characterized in that: The regulating particles are dispersed in the first adhesive sublayer and the third adhesive sublayer in the first adhesive layer, the material of the first adhesive sublayer is selected from pressure-sensitive adhesive, and the material of the third adhesive sublayer is selected from pressure-sensitive adhesive; and / or, The regulating particles are dispersed in the second adhesive sublayer and the fourth adhesive sublayer in the second adhesive layer. The material of the second adhesive sublayer is selected from pressure-sensitive adhesive, and the material of the fourth adhesive sublayer is selected from pressure-sensitive adhesive.

6. The polarizer according to claim 4, characterized in that: The regulating particles are dispersed in the first adhesive layer in the first adhesive sublayer and the third adhesive sublayer, the first adhesive layer further comprises a fifth adhesive sublayer, the fifth adhesive sublayer is located on a side of the third adhesive sublayer close to the polarizing layer, and the regulating particles are dispersed in the first adhesive layer outside the fifth adhesive sublayer; and / or, The regulating particles are dispersed in the second adhesive sublayer and the fourth adhesive sublayer in the second adhesive layer. The second adhesive layer also includes a sixth adhesive sublayer. The sixth adhesive sublayer is located on the side of the fourth adhesive sublayer close to the polarizing layer. The regulating particles are dispersed in the second adhesive layer outside the sixth adhesive sublayer.

7. The polarizer according to claim 2, characterized in that: The first protective layer includes a first hydrophilic sublayer disposed near the polarizing layer, the first adhesive layer is adhered between the polarizing layer and the first protective layer, the regulating particles are dispersed in the first adhesive layer, and the peeling force between the first adhesive layer and the first hydrophilic sublayer is greater than the peeling force between the first adhesive layer and the polarizing layer; or The regulating particles are dispersed in the second adhesive layer, and the peeling force between the second adhesive layer and the first hydrophilic sublayer is greater than the peeling force between the second adhesive layer and the second protective layer.

8. The polarizer according to claim 1, characterized in that: The first type of regulating particles is selected from at least one of the first sub-type regulating particles, the second sub-type regulating particles, the third sub-type regulating particles, the fourth sub-type regulating particles, and the fifth sub-type regulating particles, which have different shapes from each other; the second type of regulating particles is selected from at least one of the sixth sub-type regulating particles, the seventh sub-type regulating particles, the eighth sub-type regulating particles, the ninth sub-type regulating particles, and the tenth sub-type regulating particles, which have different shapes from each other; Wherein, along the extension direction of the long axis of the first sub-category regulating particle, the change value of the diameter of the first inscribed circle of the first cross section of the first sub-category regulating particle is less than or equal to 0.3 micrometers; Along the extension direction of the long axis of the second subclass regulating particle, the change value of the diameter of the first inscribed circle of the first cross section located in the middle of the second subclass regulating particle is less than or equal to 1 micron, and along the direction away from the middle of the second subclass regulating particle, the diameter of the first inscribed circle of the first cross section located at the first end of the second subclass regulating particle gradually decreases, and the change value of the diameter of the first inscribed circle of the first cross section located at the second end of the second subclass regulating particle is less than or equal to 1 micron; Along the extension direction of the long axis of the third subclass regulating particle, the change value of the diameter of the first inscribed circle of the first cross section located in the middle of the third subclass regulating particle is less than or equal to 1 micron, and along the direction away from the middle of the third subclass regulating particle, the diameter of the first inscribed circle of the first cross section located at the first end of the third subclass regulating particle gradually decreases, and the diameter of the first inscribed circle of the first cross section located at the second end of the third subclass regulating particle gradually decreases; The first end of the fourth subclass regulating particle is connected to the second end of the fourth subclass regulating particle, and the diameter of the first inscribed circle located at the first cross section of the fourth subclass regulating particle gradually decreases along the direction from the first end of the fourth subclass regulating particle to the second end of the fourth subclass regulating particle; The first end of the fifth subclass regulating particle is connected to the second end of the fifth subclass regulating particle, and the diameter of the first inscribed circle of the first cross section located at the first end of the fifth subclass regulating particle gradually decreases along the direction away from the second end of the fifth subclass regulating particle, and the diameter of the first inscribed circle of the first cross section located at the second end of the fifth subclass regulating particle gradually decreases along the direction away from the first end of the fifth subclass regulating particle; Along the extension direction of the long axis of the sixth subclass regulating particle, the change value of the diameter of the second inscribed circle of the second cross section of the sixth subclass regulating particle is less than or equal to 0.3 micrometers; The first end of the seventh subclass regulating particle is connected to the second end of the seventh subclass regulating particle, and the diameter of the second inscribed circle of the second cross section located at the first end of the seventh subclass regulating particle gradually decreases in a direction away from the second end of the seventh subclass regulating particle, and the diameter of the second inscribed circle of the second cross section located at the second end of the seventh subclass regulating particle gradually decreases in a direction away from the first end of the seventh subclass regulating particle; Along the extension direction of the long axis of the eighth subclass regulating particle, the change value of the diameter of the second inscribed circle of the second cross section located in the middle part of the eighth subclass regulating particle is less than or equal to 1 micron, and along the direction away from the middle part of the eighth subclass regulating particle, the diameter of the second inscribed circle of the second cross section located at the first end of the eighth subclass regulating particle gradually decreases, and the change value of the diameter of the second inscribed circle of the second cross section located at the second end of the eighth subclass regulating particle is less than or equal to 1 micron; Along the extension direction of the long axis of the ninth subclass regulating particle, the change value of the diameter of the second inscribed circle of the second cross section located in the middle part of the ninth subclass regulating particle is less than or equal to 1 micron, and along the direction away from the middle part of the ninth subclass regulating particle, the diameter of the second inscribed circle of the second cross section located at the first end of the ninth subclass regulating particle gradually decreases, and the diameter of the second inscribed circle of the second cross section located at the second end of the ninth subclass regulating particle gradually decreases; The first end of the tenth subclass regulating particle is connected to the second end of the tenth subclass regulating particle, and the diameter of the second inscribed circle of the second cross-section of the tenth subclass regulating particle gradually decreases along the direction from the first end of the tenth subclass regulating particle to the second end of the tenth subclass regulating particle.

9. The polarizer according to claim 1, characterized in that: The polarizer further includes a first optical functional layer located on one side of the first protective layer, wherein the first optical functional layer includes at least one of an anti-glare sublayer, a transparent hardening sublayer, a low-reflection sublayer, an anti-reflection sublayer, an anti-fingerprint sublayer, and an anti-static electron layer; Wherein, the first optical functional layer is located on a side of the first protective layer away from the polarizing layer.

10. A display device, characterized in that: The invention comprises the polarizer as claimed in any one of claims 1 to 9.

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