CN111830617A - Polarizer, preparation method thereof and display device - Google Patents
Polarizer, preparation method thereof and display device Download PDFInfo
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- CN111830617A CN111830617A CN202010038846.XA CN202010038846A CN111830617A CN 111830617 A CN111830617 A CN 111830617A CN 202010038846 A CN202010038846 A CN 202010038846A CN 111830617 A CN111830617 A CN 111830617A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
- G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
- G02B5/305—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks including organic materials, e.g. polymeric layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00634—Production of filters
- B29D11/00644—Production of filters polarizing
Abstract
The invention discloses a polarizer, a preparation method thereof and a display device. The polarizer is provided with a first area, a second area and a transition area positioned between the first area and the second area; the polarizer includes: the light transmittance of the polarizing film in the first area is greater than that of the polarizing film in the second area, and the light transmittance of the polarizing film in the transition area decreases progressively along the direction from the first area to the second area. According to the polaroid disclosed by the invention, the photosensitive assemblies such as the camera can be arranged below the polaroid in the first area, the working performance of the photosensitive assemblies such as the camera can be improved, the transition area is arranged between the first area and the second area of the polaroid, the light transmittance of the transition area is gradually reduced along the direction from the first area to the second area, the polaroid can be ensured to be smoothly transited from the first area to the second area, the obvious boundary phenomenon is avoided when the polaroid is applied to the upper part of the display panel, and the display uniformity can be further improved.
Description
Technical Field
The invention belongs to the technical field of display, and particularly relates to a polarizer, a preparation method thereof and a display device.
Background
With the development of display technology, consumers have higher and higher requirements on mobile phone screen occupation ratio, and in order to improve the screen occupation ratio, a display panel in an area above a photosensitive component such as a camera also has a display function.
In order to improve the display effect, a polarizer is arranged on the light emitting side of the display panel, but the arrangement of the polarizer can influence the light transmittance of the display panel above the photosensitive assemblies such as the camera, and further influence the performance of the photosensitive assemblies such as the camera.
Disclosure of Invention
The embodiment of the invention provides a polaroid, a preparation method thereof and a display device, and aims to improve the light transmittance of the polaroid above photosensitive assemblies such as a camera.
In a first aspect, the present invention provides a polarizer having a first region, a second region, and a transition region between the first region and the second region; the polarizer includes: the light transmittance of the polarizing film in the first area is greater than that of the polarizing film in the second area, and the light transmittance of the polarizing film in the transition area decreases progressively along the direction from the first area to the second area.
According to an aspect of the present invention, the polarization degree of the polarizing films of the first area is less than the polarization degree of the polarizing films of the second area, and the polarization degree of the polarizing films of the transition area increases in a direction in which the first area is directed to the second area.
According to one aspect of the present invention, the polarizing film includes a substrate and polarizing particles adsorbed on the substrate, the concentration of the polarizing particles in the first region is less than that of the polarizing particles in the second region, and the concentration of the polarizing particles in the transition region increases in a direction from the first region to the second region.
According to one aspect of the present invention, a polarizing film includes a substrate and polarizing particles adsorbed to the substrate, the polarizing particles in a second region are arranged unidirectionally, the polarizing particles in a first region are arranged irregularly, a part of the polarizing particles in a transition region are arranged unidirectionally, and the other part of the polarizing particles are arranged irregularly.
According to one aspect of the present invention, the substrate includes a polyvinyl alcohol film, and the polarizing particles include iodide ions or an organic dye having dichroism.
According to an aspect of the present invention, further comprising a release film, a pressure sensitive adhesive and a first cellulose triacetate film, which are sequentially stacked on one side of the polarizing film, wherein the release film is disposed adjacent to the polarizing film; and a second cellulose triacetate film and a protective film which are sequentially stacked and arranged on the other side of the polarizing film, wherein the second cellulose triacetate film is arranged close to the polarizing film.
In a second aspect, the present invention provides a method for preparing a polarizer, including: doping polarizing particles into a base material to obtain a prefabricated film; stretching the prefabricated film; and drying the stretched prefabricated film to obtain a polarizing film, and respectively doping polarizing particles in different modes and/or respectively stretching the polarizing film in different modes aiming at a first area, a second area and a transition area of the polarizing film, so that the light transmittance of the polarizing film in the first area is greater than that of the polarizing film in the second area, and the light transmittance of the polarizing film in the transition area is gradually reduced along the direction from the first area to the second area, wherein the transition area is positioned between the first area and the second area.
According to one aspect of the present invention, doping polarizing particles to a substrate to obtain a prefabricated film comprises: a substrate covering the first region and the transition region, and immersing the substrate in a solution containing polarizing particles to make the substrate in the second region adsorb the polarizing particles; shielding the base material in the first area, and immersing the base material into a solution containing polarizing particles so that the base material in the second area and the transition area adsorbs the polarizing particles; the substrate is immersed in a solution containing polarizing particles such that the polarizing particles are attracted to the substrate in the first region, the second region and the transition region.
According to one aspect of the present invention, stretching treatment of a prefabricated film includes: fixing the prefabricated film of the first area and the transition area, and stretching the prefabricated film of the second area; fixing the prefabricated film in the first area, and stretching the prefabricated film in the second area and the transition area; stretching the pre-formed film in the first zone, the second zone and the transition zone.
In a third aspect, the present invention provides a display device including the display panel of any one of the above embodiments.
In the embodiment of the invention, the light transmittance of different areas of the polarizer is designed in a differential manner, and the light transmittance of the polarizing film in the first area is greater than that of the polarizing film in the second area, so that the photosensitive assemblies such as the camera can be arranged below the polarizer in the first area, and the working performance of the photosensitive assemblies such as the camera can be improved. And, be provided with the transition region between the first region of polaroid and second region, the luminousness of transition region diminishes along the direction that the first region points to the second region, can guarantee that the luminousness of polaroid from first region to the regional gentle transition of second, when avoiding being applied to the polaroid of this embodiment in the display panel top, obvious demarcation phenomenon appears, and then can promote and show the homogeneity.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic top view of a polarizer according to an embodiment of the present invention;
fig. 2 is a schematic structural view of a polarizing film provided by an embodiment of the present invention;
FIG. 3 is a schematic view of a polarizer film according to another embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a polarizer according to an embodiment of the present invention;
fig. 5 is a schematic top view of a display device according to an embodiment of the invention;
fig. 6 is a D-D sectional view of the display device shown in fig. 5;
FIG. 7 is a flowchart of a method for manufacturing a polarizer according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a first stretching of a preformed film provided by an embodiment of the present invention.
In the figure:
100-a polarizer; 10-a polarizing film; 11-a substrate; 12-polarizing particles; 20-a first cellulose triacetate film; 30-a protective film; 40-a second cellulose triacetate film; 50-pressure sensitive adhesive; 60-a release film;
200-a display device; 210-a display panel; 220-a photosensitive component;
81-a clamp;
AA 1-first area; AA 2-second area; AA 3-transition region; AA 4-first display area; AA 5-second display area; s1 — first boundary; s2 — second boundary; s3 — boundary line.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The polarizer, the method for manufacturing the polarizer, and the display device according to the embodiment of the present invention are described in detail below with reference to fig. 1 to 8. Some well-known structures are shown hidden or transparently in the figure for the sake of clarity in illustrating the structures associated with the present invention.
Referring to fig. 1, fig. 1 is a schematic top view of a polarizer according to an embodiment of the present invention. The polarizer 100 of the present embodiment has a first area AA1, a second area AA2, and a transition area AA3 between the first area AA1 and the second area AA 2.
The polarizer 100 includes a polarizing film 10, the transmittance of the polarizing film 10 of the first area AA1 is greater than that of the polarizing film 10 of the second area AA2, and the transmittance of the polarizing film 10 of the transition area AA3 decreases in a direction in which the first area AA1 points to the second area AA 2. In this embodiment, the transition area AA3 includes a first boundary S1 adjacent to the first area AA1 and a second boundary S2 adjacent to the second area AA2, the transmittance of the first boundary S1 is consistent with the transmittance of the first area AA1, and the transmittance of the second boundary S2 is consistent with the transmittance of the second area AA2, so that the polarizer 100 does not have a significant boundary phenomenon at the boundary between the transition area AA3 and the first area AA1 and at the boundary between the transition area AA3 and the second area AA 2.
In this embodiment, the transmittance of different regions of the polarizer 100 is designed differently, and the transmittance of the polarizing film 10 in the first region AA1 is greater than the transmittance of the polarizing film 10 in the second region AA2, so that the photosensitive elements 220 such as a camera can be disposed below the polarizer 100 in the first region AA1, thereby improving the working performance of the photosensitive elements 220 such as a camera. Moreover, a transition area AA3 is disposed between the first area AA1 and the second area AA2 of the polarizer 100, and the transmittance of the transition area AA3 decreases gradually along the direction from the first area AA1 to the second area AA2, so that the transmittance of the polarizer 100 can be ensured to be smoothly transited from the first area AA1 to the second area AA2, thereby avoiding an obvious boundary phenomenon when the polarizer 100 of the embodiment is applied above the display panel 210, and further improving the display uniformity.
In this embodiment, the shapes and numbers of the first area AA1, the transition area AA3, and the second area AA2 are not limited, and fig. 1 only schematically illustrates that the polarizer 100 includes one first area AA1, one transition area AA3, and one second area AA2, and in other embodiments, the polarizer 100 may include a plurality of first areas AA1, a plurality of transition areas AA3, and a plurality of second areas AA 2. In some embodiments, the polarizer 100 may be segmented to provide a polarizer that is more consistent with size and shape requirements.
In some alternative embodiments, the polarization degree of the polarizing film 10 of the first area AA1 is less than the polarization degree of the polarizing film 10 of the second area AA2, and the polarization degree of the polarizing film 10 of the transition area AA3 decreases in a direction in which the first area AA1 points to the second area AA 2. In general, the polarization degree of the polarizer 100 is inversely proportional to the transmittance, and in the present embodiment, the transmittance of the polarizing film 10 in the first area AA1 may be adjusted by adjusting the polarization degrees of the polarizing films 10 in the first area AA1, the transition area AA3 and the second area AA 2.
The polarizing film 10 includes a substrate 11 and polarizing particles 12 adsorbed on the substrate 11, the substrate 11 is a carrier of the polarizing particles 12, and the polarizing film 100 mainly performs a polarizing function through the polarizing particles 12.
In some alternative embodiments, please refer to fig. 2, where fig. 2 is a schematic structural diagram of a polarizing film according to an embodiment of the present invention. In this embodiment, the concentrations of the polarizing particles 12 in the first area AA1, the transition area AA3 and the second area AA2 are different, and the design of the difference in light transmittance of the three areas is realized by adjusting the concentrations of the polarizing particles 12. Wherein the concentration of the polarizing particles 12 of the first area AA1 is smaller than the concentration of the polarizing particles 12 of the second area AA2, the concentration of the polarizing particles 12 of the transition area AA3 increases in a direction from the first area AA1 to the second area AA 2. In this embodiment, the polarizing particles 12 in different regions can be arranged in a single direction, and the light transmittance can be adjusted by the concentration difference.
In other alternative embodiments, please refer to fig. 3, in which fig. 3 is a schematic structural diagram of a polarizing film according to another embodiment of the present invention. In this embodiment, the polarizing particles 12 in the first region AA1, the transition region AA3, and the second region AA2 are arranged in different manners. The polarizing particles 12 of the second area AA2 are unidirectionally arranged to provide the polarizing film 10 of the second area AA2 with better polarization characteristics; the polarizing particles 12 of the first area AA1 are irregularly arranged to allow the polarizing film 10 of the first area AA1 to have better light transmittance; part of the polarizing particles 12 of the transition area AA3 are arranged unidirectionally and the other part of the polarizing particles 12 are arranged irregularly, in particular, the unidirectionally arranged polarizing particles 12 of the transition area AA3 are decreasing from the second area AA2 in the direction of the first area AA 1. The unidirectional alignment in this embodiment means that the absorption axis of the polarizing particles 12 coincides with the stretching direction of the substrate 11, and the transmission axis of the polarizing particles 12 is perpendicular to the stretching direction of the substrate 11. If the polarization direction of the light is maintained at 90 ° to the absorption axis direction of the polarizing particles 12, i.e., parallel to the transmission axis direction, the light of the polarization direction can pass through the polarizer.
In other alternative embodiments, the concentrations and the arrangement manners of the polarizing particles 12 of the first area AA1, the transition area AA3 and the second area AA2 may be different, and the light transmittance of the polarizing film 10 of the first area AA1 is greater than that of the polarizing film 10 of the second area AA2 by simultaneously adjusting the concentrations and the arrangement directions of the polarizing particles 12 of the three areas, and the light transmittance of the polarizing film 10 of the transition area AA3 decreases in a direction in which the first area AA1 points to the second area AA 2.
In the above embodiment, the substrate 11 may be a Polyvinyl Alcohol (PVA) film. It has high transparency, high ductility, good partial particle adsorption effect and good film forming property. The polarizing particles 12 may be iodide ions or organic dyes having dichroism. The stretched PVA molecules are linearly arranged in the stretching direction, and the polarizing particles 12 adsorbed on the PVA film are also deflected directionally to form long chains of the polarizing particles 12. Since iodide ions (or dye molecules) have a good polarization property, it can absorb polarized light parallel to its alignment direction and pass only polarized light in the perpendicular direction, and a polarizing film can be produced by using such a principle. Taking polarizing particles as the iodide ions as an example, the iodide ions are adsorbed on the PVA film, and the iodide ions can be arranged according to a specified rule by stretching the PVA film to form a long chain of the iodide ions. If the polarization direction of the light ray is 90 ° to the long chain direction of the iodide ion, the light ray in the polarization direction can pass through, whereas the intensity of the transmitted light is continuously reduced, even completely shielded.
In some optional embodiments, the polarizer 100 may further include at least one of a triacetyl cellulose (TAC) film, a protective film 30, a Pressure Sensitive Adhesive (PSA) 50, and a Release (Release) film 60. In a specific embodiment, please refer to fig. 4, where fig. 4 is a schematic structural diagram of a polarizer according to an embodiment of the present invention. The polarizer 100 includes a Release film 60, a PSA50, a first TAC film 20, a polarizing film 10, a second TAC film 40, and a protective film 30, which are sequentially stacked. It should be understood that fig. 4 is only an illustration of an embodiment of a polarizer, and in other embodiments, the polarizer 100 may add, reduce, or replace one or some of the film layers according to actual needs, which is not limited to the invention.
Fig. 5 and 6 show a display device, where fig. 5 is a schematic top view of the display device according to an embodiment of the present invention, and fig. 6 is a cross-sectional view of the display device shown in fig. 5. The display device 200 of the present embodiment includes a display panel 210 and the polarizer 100 of any of the above embodiments disposed on the light-emitting surface of the display panel 210.
The display panel 210 of the embodiment may be a liquid crystal display panel, or may be other types of display panels such as an Organic Light-Emitting Diode (OLED), a Micro-LED (Micro-LED), a quantum dot display panel, and the like. In some embodiments, the display panel 100 may be divided to obtain a display panel 100 that is more suitable for size and shape requirements. The display panel 100 has a first display area AA4 and a second display area AA5, wherein the transmittance of the first display area AA4 is greater than that of the second display area AA5, and the first display area AA4 and the second display area AA5 have a boundary S3.
In some optional embodiments, the non-light-emitting surface of the first display area AA4 of the display device 200 may be provided with a photosensitive component 220, and the photosensitive component 220 of this embodiment may be an image collecting device, configured to collect external image information. In this embodiment, the photosensitive element 220 is a Complementary Metal Oxide Semiconductor (CMOS) image capture Device, and in some other embodiments, the photosensitive element 220 may also be a Charge-coupled Device (CCD) image capture Device or other types of image capture devices. It is understood that the photosensitive component 220 may not be limited to an image capture device, for example, in some embodiments, the photosensitive component 220 may also be an infrared sensor, a proximity sensor, an infrared lens, a flood sensing element, an ambient light sensor, a dot matrix projector, and the like. In addition, the display device 200 may further integrate other components, such as a handset, a speaker, etc., on the non-light-emitting surface of the display panel 210.
Since the light-emitting surface of the display panel 210 in the second display area AA5 corresponds to the first area AA1 of the polarizer 100, and the first area AA1 has a higher light transmittance, light required for normal operation of the photosensitive elements 220 such as the camera can be ensured to transmit through the first area AA1, so as to improve the performance of the photosensitive elements 220 such as the camera. Moreover, a transition area AA3 of the polarizer 100 corresponds to the first display area AA4 and the second display area AA4 of the display panel 210, and when the display panel 210 displays, the brightness of the first display area AA4 and the brightness of the second display area AA5 can be smoothly transitioned, so that the boundary phenomenon is avoided, and the display uniformity of the display device 200 is improved.
Since the display device 200 of the present embodiment includes the polarizer 100 of any of the above embodiments, it also has the beneficial effects of the polarizer 100 of the above embodiments, and details are not repeated herein.
The display device 200 of the present embodiment may be used in electronic devices such as a mobile phone, a tablet computer, an electronic book reader, a multimedia playing device, a wearable device, and a vehicle-mounted terminal.
Fig. 7 shows a method for manufacturing a polarizer, where fig. 7 is a flowchart of a method for manufacturing a polarizer according to an embodiment of the present invention. The method for manufacturing the polarizer 100 of the present embodiment includes the following steps:
And 703, drying the prefabricated film after the stretching treatment to obtain the polarizing film.
In this embodiment, different manners of doping the polarizing particles 12 may be performed on the first area AA1, the transition area AA3, and the second area AA2 of the polarizing film, respectively, and/or different manners of stretching treatment may be performed on the polarizing film, respectively, so that the transmittance of the polarizing film 10 of the first area AA1 is greater than that of the polarizing film 10 of the second area AA2, and the transmittance of the polarizing film 10 of the transition area AA3 decreases in a direction in which the first area AA1 points to the second area AA2, where the transition area AA3 is located between the first area AA1 and the second area AA 2.
In the preparation method of the polarizer 100 of the embodiment, the light transmittances of different areas of the polarizer 100 are designed differently, and the light transmittance of the polarizing film 10 in the first area AA1 is greater than the light transmittance of the polarizing film 10 in the second area AA2, so that the photosensitive elements 220 such as a camera can be arranged below the polarizer 100 in the first area AA1, and the working performance of the photosensitive elements 220 such as a camera can be improved. Moreover, a transition area AA3 is disposed between the first area AA1 and the second area AA2 of the polarizer 100, and the transmittance of the transition area AA3 decreases gradually along the direction from the first area AA1 to the second area AA2, so that the transmittance of the polarizer 100 can be ensured to be smoothly transited from the first area AA1 to the second area AA2, thereby avoiding an obvious boundary phenomenon when the polarizer 100 is applied above the display panel 210, and further improving the display uniformity.
In some optional embodiments, step 701 specifically includes:
masking the substrate 11 in the first area AA1 and the transition area, immersing the substrate 11 in a solution containing the polarizing particles 12 to make the substrate 11 in the second area AA2 adsorb the polarizing particles; then, the substrate 11 in the first area AA1 is masked, and the substrate 11 is immersed in a solution containing the polarizing particles 12, so that the second area AA2 and the transition area AA3 adsorb the polarizing particles 12; thereafter, the substrate 11 is immersed in the solution containing the polarizing particles 12, so that the substrate of the first region AA1, the second region AA2 and the transition region AA3 adsorbs the polarizing particles 12.
In this embodiment, a shielding film may be attached to the region to be shielded to prevent the region from being immersed in the polarizing particles 12. In the embodiment, the polarizing film 10 can be obtained by stretching the first area AA1, the second area AA2 and the transition area AA3 with the same stretching force to obtain the polarizing film 10, so that the light transmittance of the first area AA1 is greater than that of the second area AA2, and the light transmittance of the transition area AA3 decreases progressively along the direction from the first area AA1 to the second area AA 2. The adjustment of the light transmittance of the polarizer 100 is realized by adjusting the concentration of the polarizing particles 12, and the method is simple and easy to implement.
In some alternative embodiments, the substrate 12 in the transition area AA3 may be masked and immersed in the solution containing the polarizing particles 12 multiple times to provide different areas of the polarizing film in the transition area AA3 with different concentrations of polarizing particles 12.
In other alternative embodiments, step 702 specifically includes:
securing the pre-formed film in the first area AA1 and the transition area AA3, stretching the pre-formed film in the second area AA 2; then, the prefabricated film of the first area AA1 is fixed, and the prefabricated film of the second area AA2 and the transition area AA3 is stretched; the pre-formed films of the first region AA1, the second region AA2, and the transition region AA3 are then stretched simultaneously.
In this embodiment, a corresponding area may be stretched by polarizer stretching equipment, and for an area that does not need stretching, a clamp is used to fix the area that does not need stretching, please refer to fig. 8, where fig. 8 is a schematic diagram of first stretching of a prefabricated film according to an embodiment of the present invention. In the first stretching process, the clamp 81 is clamped in the transition area AA3 and the second area AA2, and then the two ends of the prefabricated film are stretched by the polarizer stretching device, so that the transition area AA3 and the first area AA1 clamped by the clamp 81 can be prevented from being influenced by tensile force, and arrows at the two ends of the prefabricated film are stretching directions in the drawing. Similarly, in the second stretching process, the prefabricated film is clamped in the first area AA1 through the clamp 8, and then stretched through the polarizer stretching device, so that the influence of the tensile force on the first area AA1 clamped by the clamp 81 can be avoided. In this embodiment, the three regions are stretched to different degrees to meet the requirements of different regions for light transmittance and polarization degree difference. In this embodiment, the substrate 11 may be directly immersed in the solution containing the polarizing particles 12 to obtain a prefabricated film, and the step of doping the polarizing particles 12 into the substrate 11 may be simplified.
In some alternative embodiments, the preformed film in the transition area AA3 may be subjected to multiple different area fixing and stretching operations to make the polarizing film in the transition area AA3 have polarizing particles 12 with different arrangements.
In accordance with the above-described embodiments of the present invention, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A polarizer having a first region, a second region, and a transition region between the first region and the second region; the polarizer includes:
a polarizing film, the transmittance of the polarizing film of the first region being greater than the transmittance of the polarizing film of the second region, the transmittance of the polarizing film of the transition region decreasing in a direction in which the first region points to the second region.
2. The polarizer according to claim 1, wherein the polarization degree of the polarizing film of the first area is smaller than that of the polarizing film of the second area, and the polarization degree of the polarizing film of the transition area increases in a direction in which the first area points to the second area.
3. The polarizer according to claim 1, wherein said polarizing film comprises a substrate and polarizing particles adsorbed to said substrate, a concentration of said polarizing particles in said first region is less than a concentration of said polarizing particles in said second region, and a concentration of said polarizing particles in said transition region increases in a direction in which said first region points toward said second region.
4. The polarizer according to claim 1, wherein said polarizing film comprises a substrate and polarizing particles adsorbed to said substrate, said polarizing particles of said second region are arranged unidirectionally, said polarizing particles of said first region are arranged irregularly, part of said polarizing particles of said transition region are arranged unidirectionally, and the other part of said polarizing particles are arranged irregularly.
5. The polarizer according to claim 3 or 4, wherein the substrate comprises a polyvinyl alcohol film, and the polarizing particles comprise iodine ions or an organic dye having dichroism.
6. The polarizer according to claim 1, further comprising a release film, a pressure-sensitive adhesive and a first cellulose triacetate film, which are sequentially laminated and disposed at one side of the polarizing film, wherein the release film is disposed adjacent to the polarizing film; and
and the second cellulose triacetate film and the protective film are sequentially stacked and arranged on the other side of the polarizing film, wherein the second cellulose triacetate film is arranged close to the polarizing film.
7. A method for preparing a polarizer, comprising:
doping polarizing particles into a base material to obtain a prefabricated film;
stretching the prefabricated film; and
drying the prefabricated film after the stretching treatment to obtain a polarizing film,
respectively doping polarizing particles in different modes and/or respectively carrying out stretching treatment in different modes on a first area, a second area and a transition area of the polarizing film, so that the light transmittance of the polarizing film in the first area is greater than that of the polarizing film in the second area, and the light transmittance of the polarizing film in the transition area decreases in a direction from the first area to the second area, wherein the transition area is positioned between the first area and the second area.
8. The method of claim 7, wherein the doping polarizing particles into the substrate to obtain a prefabricated film comprises:
shielding the substrate in the first region and the transition region, and immersing the substrate in a solution containing the polarizing particles so that the substrate in the second region adsorbs the polarizing particles;
masking the substrate in the first region, immersing the substrate in a solution containing the polarizing particles so that the substrate in the second region and the transition region adsorbs the polarizing particles;
immersing the substrate in a solution comprising the polarizing particles such that the substrate of the first region, the second region, and the transition region adsorbs the polarizing particles.
9. The method for producing a polarizer according to claim 7, wherein the stretching treatment of the pre-formed film comprises:
fixing the pre-made film of the first region and the transition region, stretching the pre-made film of the second region;
fixing the pre-made film of the first region, stretching the pre-made film of the second region and the transition region;
stretching the pre-film of the first, second and transition regions.
10. A display device, comprising:
the display panel is provided with a first display area and a second display area, wherein the light transmittance of the first display area is greater than that of the second display area, and the first display area and the second display area are provided with a boundary line;
the polarizer of any one of claims 1 to 6, disposed on a light-emitting surface of the display panel, wherein an orthographic projection of the first region on the display panel is located in the first display area, an orthographic projection of the second region on the display panel is located in the second display area, and an orthographic projection of the transition region on the display panel covers the boundary.
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