Polarizer and display module
By setting high haze scattered particles in the first protective layer of the polarizer, the display marking problem caused by the destruction of the optical characteristics of the polarizer in extreme environments is solved, and the effect of significantly improving the display effect is achieved.
Patent Information
- Application Number
- CN202420074067.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-11
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-01-11
AI Technical Summary
In extreme environments, high temperature and humidity will destroy the crude oil optical characteristics of the polarizer, resulting in poor spot markings and the existing anti-glare layer has a small haze, which cannot effectively improve the spot marking problem.
A polarizer is designed, in which scattered particles are provided in the first protective layer, and the haze of the first protective layer is greater than or equal to 70%, so that the light at the markings is mixed with the light in the normal display area through the scattering and mixing effects. The eyes cannot detect marks.
By increasing the scattered particles and increasing the haze of the first protective layer, the risk of poor display markings is significantly reduced and the display effect is improved.
Smart Images
Figure CN222461724U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of display technology, and in particular to a polarizer and a display module. Background Art
[0002] The display module is generally composed of a liquid crystal box and polarizers attached to both sides of the liquid crystal box. The polarizer generally includes a core layer for polarizing light and protective layers on both sides of the core layer.
[0003] In the process of research and practice of the prior art, the inventors of the present application found that under extreme environments, high temperature and humidity will destroy the crude optical characteristics of the core layer, resulting in poor display mottled patterns. In addition, the display itself will also produce poor mottled patterns other than those caused by the polarizer due to fluctuations in the manufacturing process.
[0004] In the related art, an anti-glare layer is added on one side of the liquid crystal box, but the haze of the anti-glare layer is small, and the human eye can still see the spots, which does not achieve a substantial improvement effect. Utility Model Content
[0005] The embodiments of the present application provide a polarizer and a display module, which can reduce the risk of display mottle defects.
[0006] The present application provides a polarizer, which includes:
[0007] Polarizing layer;
[0008] A first protective layer, wherein the first protective layer is arranged on a light-emitting side of the polarizing layer;
[0009] The first protective layer includes a main layer and scattering particles, the scattering particles are arranged in the main layer, and the haze of the first protective layer is greater than or equal to 70%.
[0010] Optionally, in some embodiments of the present application, the scattering particles include at least one of transparent solid particles and air bubbles.
[0011] Optionally, in some embodiments of the present application, the scattering particles include air bubbles, and the air bubbles extend along the stretching direction of the first protective layer to form strips.
[0012] Optionally, in some embodiments of the present application, the scattering particles include the solid particles, and a concave-convex microstructure is formed on a side of the first protective layer away from the polarizing layer.
[0013] Optionally, in some embodiments of the present application, one of the solid particles corresponds to a protrusion of the concave-convex microstructure.
[0014] Optionally, in some embodiments of the present application, the light transmittance of the first protective layer is greater than or equal to 80%.
[0015] Optionally, in some embodiments of the present application, the polarizer further includes a second protective layer and an adhesive layer, the second protective layer is arranged on the light incident side of the polarizing layer, and the adhesive layer is arranged on a side of the second protective layer away from the polarizing layer.
[0016] Optionally, in some embodiments of the present application, the light transmittance of the polarizer is greater than or equal to 35%, and the polarization degree of the polarizer is greater than or equal to 99.99%.
[0017] Optionally, in some embodiments of the present application, the light transmittance of the polarizer is greater than or equal to 40%.
[0018] Correspondingly, an embodiment of the present application also provides a display module, which includes a panel, a backlight module and a polarizer as described in any one of the above embodiments, the panel is arranged on the light-emitting side of the backlight module, at least one of the light-emitting side and the light-incident side of the panel is provided with the polarizer, and the first protective layer is located on the side of the polarizing layer away from the panel.
[0019] Optionally, in some embodiments of the present application, the polarizer located on the light-emitting side of the panel also includes a surface treatment layer arranged on the side of the first protective layer away from the polarizing layer, and the surface treatment layer includes at least one of a hardening layer, an anti-glare layer and an anti-reflection layer.
[0020] The polarizer of the embodiment of the present application has scattering particles arranged in the first protective layer, and the haze of the first protective layer is greater than or equal to 70%. When light passes through the first protective layer, scattering and mixing occur, so that the light at the stripes is mixed with the light in the surrounding normal display area, so that the human eye cannot perceive the existence of the stripes, thereby achieving an improved display effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 is a schematic structural diagram of a polarizer provided in an embodiment of the present application;
[0022] Figure 2 is a schematic diagram of the structure of a display module provided in an embodiment of the present application;
[0023] Figure 3 is another structural schematic diagram of a display module provided in an embodiment of the present application;
[0024] Figure 4 This is another structural schematic diagram of the display module provided in an embodiment of the present application. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, 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 drawings; while "inside" and "outside" refer to the outline of the device; the terms "first", "second", "third", etc. are used only as markings, and no numerical requirements are imposed or order is established.
[0026] The embodiments of the present application provide a polarizer and a display module, which are described in detail below. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments.
[0027] Please refer to Figure 1 The embodiment of the application provides a polarizer 100, which includes a polarizing layer 11 and a first protective layer 12. The first protective layer 12 is disposed on the light-emitting side of the polarizing layer 11.
[0028] The first protective layer 12 includes a main layer 121 and scattering particles 122, and the scattering particles 122 are disposed in the main layer 121. The haze of the first protective layer 12 is greater than or equal to 70%.
[0029] The polarizer 100 of the embodiment of the present application has scattering particles 122 disposed in the first protective layer 12, and the haze of the first protective layer 12 is greater than or equal to 70%. When light passes through the first protective layer 12, it is scattered and mixed, so that the light at the speckle is mixed with the light in the surrounding normal display area, so that the human eye cannot perceive the existence of the speckle, thereby achieving an improved display effect.
[0030] It can be understood that, compared with additionally providing a surface treatment layer, the present application provides the scattering particles in the first protective layer, which not only saves process steps and costs, but also improves the display effect.
[0031] Optionally, in one embodiment, the polarizer 100 further includes a second protective layer 13 and an adhesive layer 14, wherein the second protective layer 13 is disposed on the light incident side of the polarizing layer 11. The adhesive layer 14 is disposed on a side of the second protective layer 13 away from the polarizing layer 11.
[0032] The first protective layer 12 and the second protective layer 13 have the function of blocking water vapor, which can reduce the risk of degradation of the emission optical performance of the polarizing layer 11 .
[0033] Optionally, the materials of the main layer 121 of the first protective layer 12 and the second protective layer 13 include at least one of triacetyl cellulose film (TAC), polyethylene terephthalate (PET) with higher water barrier properties, acrylic resin (PMMA), polypropylene (PP), polycarbonate (PC) and polycycloolefin resin (COP).
[0034] Optionally, in one embodiment, the scattering particles 122 include at least one of transparent solid particles and air bubbles.
[0035] It is understandable that light will be scattered when radiated to the scattering particles 122 .
[0036] Optionally, the solid particles may be metal oxides, such as silicon oxide; or may be organic materials, such as acrylates.
[0037] Optionally, in one embodiment, the particle size of the scattering particles 122 is between 10 nanometers and 100 micrometers. For example, the particle size of the scattering particles 122 can be 10 nanometers, 20 nanometers, 30 nanometers, 40 nanometers, 50 nanometers, 60 nanometers, 70 nanometers, 80 nanometers, 90 nanometers, 100 nanometers, 1 micrometer, 2 micrometers, 3 micrometers, 4 micrometers, 5 micrometers, 6 micrometers, 7 micrometers, 8 micrometers, 9 micrometers, 10 micrometers, 20 micrometers, 30 micrometers, 40 micrometers, 50 micrometers, 60 micrometers, 70 micrometers, 80 micrometers, 90 micrometers or 100 micrometers.
[0038] It should be understood that the smaller the particle size of the scattering particles 122, the greater the amount of scattering particles 122 required under the same haze requirement, and the particles are more likely to agglomerate; while if the particle size is too large, flickering problems are likely to occur, and the larger the particle size, the grainier the picture will be.
[0039] Therefore, in order to avoid particle agglomeration and picture graininess to a great extent while meeting the haze requirements, the particle size of the scattering particles 122 can be set between 2 microns and 40 microns, for example, 2 microns, 3 microns, 4 microns, 5 microns, 6 microns, 7 microns, 8 microns, 9 microns, 10 microns, 20 microns, 30 microns or 40 microns, etc.
[0040] Optionally, in one embodiment, the scattering particles 122 include air bubbles, and the air bubbles extend along the stretching direction of the first protective layer 12 to form strips.
[0041] It should be understood that the first protective layer 12 and the second protective layer 13 are both prepared by extrusion stretching film or cast film. Therefore, during the stretching process, the air bubbles are also stretched and deformed, so that the air bubbles become longer in the stretching direction and are arranged in a regular pattern.
[0042] Optionally, in one embodiment, the scattering particles 122 include solid particles, and a concave-convex microstructure is formed on a surface of the first protective layer 12 away from the polarizing layer 11. The surface microstructure of the first protective layer 12 can further scatter light, thereby reducing the amount of scattering particles 122 used.
[0043] It is understandable that when the hardness of the entity particles is greater than the hardness of the main layer 121, during the stretching process, the stretching degree of the main layer 121 is greater than the stretching degree of the entity particles, and then due to the presence of the entity particles, a concave-convex microstructure will appear on the surface of the main layer 121.
[0044] Optionally, in one embodiment, the number of the concavo-convex microstructures is in direct proportion to the number of the solid particles. Optionally, one solid particle corresponds to one protrusion of the concavo-convex microstructure, that is, the density and distribution of the concavo-convex microstructure can be adjusted by the number and distribution of the solid particles.
[0045] Optionally, in one embodiment, the light transmittance of the first protective layer 12 is greater than or equal to 80%, for example, it may be 80%, 85%, 90%, 95% or 99%, etc. Such a setting can ensure light extraction efficiency.
[0046] Optionally, in one embodiment, the thickness of the first protective layer 12 is between 20 microns and 120 microns, for example, it can be 20 microns, 30 microns, 40 microns, 50 microns, 60 microns, 70 microns, 80 microns, 90 microns, 100 microns, 110 microns or 120 microns, etc.
[0047] It is understandable that if the first protective layer 12 is too thin, the product is prone to unevenness and film breakage. If the first protective layer 12 is too thick, the material stress is relatively large, which is easy to cause material warping. Therefore, the thickness of the first protective layer 12 and the second protective layer 13 are both between 20 microns and 120 microns, which ensures the flatness of the protective layer and is not easy to cause warping.
[0048] Optionally, in one embodiment, the light transmittance of the polarizer 100 is greater than or equal to 35%, such as 35%, 40%, 45%, 50%, 55% or 60%, etc. The polarization degree of the polarizer 100 is greater than or equal to 99.99%.
[0049] Optionally, in one embodiment, the light transmittance of the polarizer 100 is greater than or equal to 40%, such as 40%, 45%, 50%, 55%, 60% or 65%, etc. Such a setting ensures that the polarizer 100 has a better light output effect.
[0050] Correspondingly, the embodiment of the present application further provides a display module 1000 , which includes a panel 200 , a backlight module 300 , and the polarizer 100 as described in any of the above embodiments.
[0051] The panel 200 is disposed on the light-emitting side of the backlight module 300 . A polarizer 100 is disposed on at least one of the light-emitting side and the light-incoming side of the panel 200 , and the first protective layer 12 is located on the side of the polarizer layer 11 away from the panel 200 .
[0052] It should be noted that the structure of the polarizer 100 of the display module 1000 of this embodiment is similar to or the same as the structure of the polarizer 100 described in any of the above embodiments, and thus will not be described in detail herein.
[0053] Optional, see Figure 2 , the polarizer 100 is a first polarizer, and the first polarizer 100 is disposed on the light-emitting side of the panel 200. The display module 1000 also includes a second polarizer 400, and the second polarizer 400 is disposed on the light-incident side of the panel 200. Compared with the first polarizer 100, the second polarizer 400 has the same stacking structure as the first polarizer 100, but the scattering particles 122 are not disposed in the third protective layer of the second polarizer 400.
[0054] The second polarizer 400 includes a third protective layer 21 , a second polarizing layer 22 , a fourth protective layer 23 and a glue layer 24 stacked in sequence.
[0055] The first polarizer 100 is arranged on the light-emitting side of the panel 200 to improve the spots of the polarizer itself and the display screen.
[0056] Optionally, the polarizer 100 located on the light-emitting side of the panel 200 further includes a surface treatment layer 15 disposed on the side of the first protective layer 12 away from the polarizing layer 11 , and the surface treatment layer 15 includes at least one of a hardening layer, an anti-glare layer and an anti-reflection layer.
[0057] In one embodiment, please refer to Figure 3 , the polarizer 100 is a first polarizer, and the first polarizer 100 is disposed on the light incident side of the panel 200. The display module 1000 also includes a second polarizer 400, and the second polarizer 400 is disposed on the light exiting side of the panel 200. Compared with the first polarizer 100, the second polarizer 400 has the same stacking structure as the first polarizer 100, but the scattering particles 122 are not disposed in the first protective layer of the second polarizer 400.
[0058] The first polarizer 100 is arranged on the light incident side of the panel 200 to improve the backlight stripes without causing a grainy feeling on the picture.
[0059] In one embodiment, please refer to Figure 4 The polarizer 100 includes a first polarizer 101 and a second polarizer 102 . The first polarizer 101 is disposed on the light-emitting side of the panel 200 . The second polarizer 102 is disposed on the light-incident side of the panel 200 .
[0060] Optionally, the first polarizer 101 further includes a surface treatment layer 15 disposed on a side of the first protective layer 12 away from the polarizing layer 11 , and the surface treatment layer 15 includes at least one of a hardening layer, an anti-glare layer and an anti-reflection layer.
[0061] The mottle defects caused by the backlight module 300 , the panel 200 and the polarizer 100 can be improved at the same time.
[0062] The polarizer of the display module of the embodiment of the present application is provided with scattering particles in the first protective layer, and the haze of the first protective layer is greater than or equal to 70%. When light passes through the first protective layer, scattering and mixing occur, so that the light at the stripes and the light in the surrounding normal display area are mixed together, so that the human eye cannot perceive the existence of the stripes, thereby achieving an improvement in the display effect.
[0063] The above is a detailed introduction to a polarizer and a display module provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technicians in this field, according to the idea of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.
Claims
1. A polarizer, characterized in that: include: Polarizing layer; A first protective layer, wherein the first protective layer is arranged on a light-emitting side of the polarizing layer; The first protective layer includes a main layer and scattering particles, the scattering particles are arranged in the main layer, and the haze of the first protective layer is greater than or equal to 70%.
2. The polarizer according to claim 1, characterized in that: The scattering particles include at least one of transparent solid particles and air bubbles.
3. The polarizer according to claim 2, characterized in that: The scattering particles include the air bubbles, and the air bubbles extend along the stretching direction of the first protective layer to form strips.
4. The polarizer according to claim 2, characterized in that: The scattering particles include the solid particles, and a concave-convex microstructure is formed on a side of the first protective layer away from the polarizing layer.
5. The polarizer according to claim 4, characterized in that: One of the solid particles corresponds to one protrusion of the concavo-convex microstructure.
6. The polarizer according to any one of claims 1 to 5, characterized in that: The light transmittance of the first protective layer is greater than or equal to 80%.
7. The polarizer according to any one of claims 1 to 5, characterized in that: The polarizer further includes a second protective layer and an adhesive layer. The second protective layer is arranged on the light incident side of the polarizing layer, and the adhesive layer is arranged on a side of the second protective layer away from the polarizing layer.
8. The polarizer according to claim 7, characterized in that: The light transmittance of the polarizer is greater than or equal to 35%, and the polarization degree of the polarizer is greater than or equal to 99.99%.
9. The polarizer according to claim 8, characterized in that: The light transmittance of the polarizer is greater than or equal to 40%.
10. A display module, characterized in that: It includes a panel, a backlight module and a polarizer as described in any one of claims 1 to 9, wherein the panel is arranged on the light-emitting side of the backlight module, the polarizer is arranged on at least one of the light-emitting side and the light-incident side of the panel, and the first protective layer is located on the side of the polarizer layer away from the panel.
11. The display module according to claim 10, characterized in that: The polarizer located at the light-emitting side of the panel further includes a surface treatment layer arranged on a side of the first protective layer away from the polarizing layer, and the surface treatment layer includes at least one of a hardening layer, an anti-glare layer and an anti-reflection layer.