CN110673251A - Polarizing plate preparation method, polarizing plate, display screen and electronic equipment - Google Patents
Polarizing plate preparation method, polarizing plate, display screen and electronic equipment Download PDFInfo
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- CN110673251A CN110673251A CN201910859207.7A CN201910859207A CN110673251A CN 110673251 A CN110673251 A CN 110673251A CN 201910859207 A CN201910859207 A CN 201910859207A CN 110673251 A CN110673251 A CN 110673251A
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- protective film
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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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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Polarising Elements (AREA)
- Liquid Crystal (AREA)
Abstract
The invention relates to a preparation method of a polaroid, a display screen and electronic equipment. The preparation method of the polaroid comprises the following steps: covering protective films on the upper surface and the lower surface of a preset area of the resin film, wherein the preset area is an area corresponding to the non-polarizing part on the resin film; immersing the resin film covered with the protective film into an iodine solution for dyeing; the resin film was taken out from the iodine solution, and the protective film was removed, to obtain a polarizing plate including a polarizing portion and a non-polarizing portion. The preparation method of the polaroid can solve the problem that in the prior art, the upper polaroid structure is easily damaged due to the fact that holes are directly formed in the upper polaroid, and the quality of the upper polaroid is affected.
Description
Technical Field
The invention relates to the technical field of mobile terminal equipment, in particular to a polaroid preparation method, a polaroid, a display screen and electronic equipment.
Background
With the development of electronic technology, smart mobile terminals have become indispensable electronic devices in life, and a photographing function is one of the indispensable functions in mobile terminals. At present, a front camera is usually arranged on one side of a front display screen of a mobile terminal and is used for realizing functions of self-shooting and the like. However, the front camera needs to shoot through the transparent glass of the touch screen, so a certain area is usually reserved on the front display screen side of the mobile terminal to arrange the front camera. To ensure that light passes through the screen to the camera, most parts of the display screen need to be perforated. In order to reduce the influence of the upper polarizer on light, an opening needs to be formed in the upper polarizer. However, the upper polarizer is directly perforated, which easily causes the damage of the upper polarizer structure and affects the quality of the upper polarizer.
Disclosure of Invention
The embodiment of the invention provides a method for preparing a polaroid, which aims to solve the problem that in the prior art, the upper polaroid structure is easily damaged and the quality of the upper polaroid is influenced due to the fact that holes are directly formed in the upper polaroid.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, an embodiment of the present invention provides a method for manufacturing a polarizer, including:
covering protective films on the upper surface and the lower surface of a preset area of the resin film, wherein the preset area is an area corresponding to the non-polarizing part on the resin film;
immersing the resin film covered with the protective film into an iodine solution for dyeing;
the resin film was taken out from the iodine solution, and the protective film was removed, to obtain a polarizing plate including a polarizing portion and a non-polarizing portion.
According to the method for manufacturing a polarizing plate of an embodiment of the present invention, before the dyeing process, the protective films are previously provided on the upper surface and the lower surface of the predetermined region of the resin film, so that in the dyeing process, the protective films can block the iodine solution from penetrating into the predetermined region, so that the predetermined region does not contain iodine molecules and thus does not have a polarizing function, and the portion outside the predetermined region, which is not covered by the protective films, can be penetrated and dyed by the iodine solution so that the portion has the polarizing function. Therefore, by using the preparation method provided by the embodiment of the invention, the polarizing part and the non-polarizing part can be formed without damaging the whole structure of the polarizing film, the structural integrity of the polarizing film is effectively ensured, the possibility of structural damage is reduced, and the product quality is improved.
In a second aspect, there is provided a polarizing plate according to an embodiment of the present invention, including: the polarizing plate was prepared by the method for preparing the polarizing plate as in the above example.
In a third aspect, an embodiment according to the present invention provides a display screen applied to an electronic device, including:
the liquid crystal display panel comprises a backlight module, a liquid crystal layer, an upper polaroid and a cover plate which are arranged in a stacked mode, wherein the upper polaroid is the polaroid of the embodiment, and an optical adhesive layer is arranged between the upper polaroid and the cover plate;
the liquid crystal layer and the backlight module are provided with light holes, the upper polaroid covers the light holes, and the non-polarization part of the upper polaroid corresponds to the light holes.
In a fourth aspect, according to an embodiment of the present invention, there is provided an electronic device including the display screen as in the above embodiments.
Drawings
Features, advantages and technical effects of exemplary embodiments of the present invention will be described below by referring to the accompanying drawings.
Fig. 1 is a schematic flow chart of a method for manufacturing a polarizing plate according to an embodiment of the present invention;
FIG. 2 is a schematic view of a partial structure of a resin film according to an embodiment of the present invention;
FIG. 3 is a schematic view of a connection structure of a resin film and a protective film according to an embodiment of the present invention;
FIG. 4 is a schematic side view of the embodiment of FIG. 3;
fig. 5 is a schematic view of a polarizer manufactured by a method of manufacturing a polarizer according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a polarizing plate according to an embodiment of the present invention;
fig. 7 is a schematic partial sectional view of a display screen according to an embodiment of the invention.
In the drawings, the drawings are not necessarily drawn to scale.
Description of the labeling:
10. a resin film; 101. presetting an area; 102. a buffer area; 20. a non-polarizing section; 30. a polarizing section; 40. a protective film; 50. a polarizing plate; 60. a transport membrane; 70. a tacky release film; 80. a first press roll; 90. a second press roll;
100. a display screen; 200. a backlight module; 300. a liquid crystal layer; 400. an upper polarizing plate; 500. an optical adhesive layer; 600. a light-transmitting hole; 700. a lower polarizing plate; 800. a cover plate;
x, an optical device.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the invention and are not intended to limit the scope of the invention, i.e., the invention is not limited to the described embodiments.
In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated for convenience in describing the invention and to simplify description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The following description is given with reference to the orientation words as shown in the drawings, and is not intended to limit the specific structure of the present invention. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
For a better understanding of the present invention, embodiments of the present invention are described below with reference to fig. 1 to 7.
Referring to fig. 1, an embodiment of the present invention provides a method for preparing a polarizer 50 having a non-polarizing part 20 and a polarizing part 30. The preparation method of this example includes the following steps:
covering the upper surface and the lower surface of a preset area 101 of the resin film 10 with the protective film 40, wherein the preset area 101 is an area corresponding to the non-polarizing part 20 on the resin film 10;
immersing the resin film 10 covered with the protective film 40 in an iodine solution for dyeing;
the resin film 10 is taken out of the iodine solution, and the protective film 40 is removed, resulting in the polarizing plate 50 including the polarizing part 30 and the non-polarizing part 20.
The material of the resin film 10 as the base is preferably a polyvinyl alcohol resin (PVA resin), and may be, for example, polyvinyl alcohol or an ethylene-vinyl alcohol copolymer. Referring to fig. 2, the resin film 10 has a predetermined region 101 for forming the non-polarizing portion 20 having no polarizing function. The region other than the predetermined region 101 is used to form the polarizing portion 30 having a polarizing function. The resin film 10 has an upper surface and a lower surface opposed in the thickness direction. The material of the protective film 40 may be plastic or resin. The material of the protective film 40 may be different from that of the resin thin film 10. Referring to fig. 3 and 4, since the protective film 40 is previously covered on the upper and lower surfaces of the preset region 101, the preset region 101 covered with the protective film 40 is shielded by the protective film 40 in the dyeing process step, so that the iodine solution is not substantially in contact with the preset region 101 to dye the preset region 101, and the other region not covered with the protective film 40 is in contact with the iodine solution to be dyed. After the resin film 10 covered with the protective film 40 is immersed in the iodine solution for a predetermined period of time, the dyeing process is completed. The resin film 10 covered with the protective film 40 is taken out from the iodine solution, and then the protective film 40 is removed. Since the preset region 101 is not dyed by the iodine solution, the preset region 101 can form the non-polarizing portion 20 having no polarizing function. The area of the resin film 10 other than the predetermined area 101 is dyed with iodine solution, so that the polarizing portion 30 having a polarizing function can be formed. Thus, the resin film 10 is processed in the above-described steps, and the polarizing plate 50 including the polarizing portion 30 and the non-polarizing portion 20 can be obtained.
Compared with a preparation method in which a part of the structure corresponding to the preset region 101 is removed mechanically (for example, by cutting or punching with a cutter) to form an opening, the preparation method of the polarizing plate 50 according to the embodiment of the present invention can reduce the possibility of structural damage such as cracking or delamination (interlayer peeling) of the substrate, and improve the quality and yield of the prepared product. In addition, compared with the preparation method of forming the non-polarizing part 20 with a low-concentration iodine solution by decomposing iodine molecules with laser or reducing iodine complexes into iodine ions by contacting an alkaline solution, in the preparation method of the polarizing plate 50 of the embodiment of the invention, because the preset region 101 does not contain iodine molecules, the formed non-polarizing part 20 can completely have no polarizing function, and the non-polarizing part 20 is ensured to have more excellent transparency and light passing property, so that when the polarizing plate 50 is applied to electronic equipment and is arranged corresponding to the optical device X, the adverse effect of the polarizing plate 50 on the lighting performance of the optical device X can be effectively reduced.
The position, shape or size of the preset region 101 of the present embodiment can be designed according to the product requirement. Preferably, the shape of the preset area 101 is a circular area. The dotted lines in fig. 2 are for schematic description only and do not represent a physical structure.
When the protective film 40 is connected with the resin film 10, a microscopic gap exists between the edge of the protective film 40 and the resin film 10, so that after the protective film 40 is immersed in the iodine solution for a predetermined time, the iodine solution can penetrate into the preset region 101 from the edge of the protective film 40, and the edge region of the preset region 101 still has a polarization function, so that the area of the actual non-polarization part 20 is smaller than the area of the preset non-polarization part 20, and the whole light transmittance of the non-polarization part 20 is affected. Therefore, in one embodiment, the area of the protective film 40 is greater than the area of the preset region 101, such that the edge of the protective film 40 is at a predetermined distance from the edge of the preset region 101 and at the periphery of the edge of the preset region 101. An area defined between an edge of the protective film 40 and an edge of the preset area 101 may form the buffer area 102. The iodine solution penetrates into the buffer area 102 defined between the edge of the protective film 40 and the edge of the preset area 101, so that the possibility that the iodine solution penetrates into the preset area 101 can be reduced, the area accuracy of the non-polarization part 20 formed in the preset area 101 is guaranteed, the area of the actually formed non-polarization part 20 is guaranteed to be consistent with the area of the preset non-polarization part 20, and the quality of the polarizing plate 50 is improved.
The surface of the protective film 40 itself may be coated with an adhesive to form an adhesive layer having a predetermined tackiness on the surface, or an adhesive sheet having tackiness, such as a double-sided tape, may be previously attached to the surface of the protective film 40 itself. Preferably, the adhesive sheet has the same area as the protective film 40. In this way, the protective film 40 can be detachably adhered to the upper surface and the lower surface of the preset region 101 of the resin film 10 in an adhering manner, so that on one hand, the protective film 40 and the resin film 10 are stably and reliably connected, the protective film 40 is not easy to separate from the resin film 10 in the conveying process and the dyeing process, and the possibility that the preset region 101 is dyed due to the falling off of the protective film 40 in the dyeing process is reduced; on the other hand, after the dyeing process is completed, the removal of the protective film 40 is facilitated, while making the protective film 40 and the resin film 10 less susceptible to structural damage during the removal process.
In one embodiment, the adhesiveness of the surface of the protective film 40 on the side facing the resin film 10 is greater than the adhesiveness of the surface of the protective film 40 on the side facing away from the resin film 10. Before the protective film 40 is attached to the resin film 10, the protective film 40 may be attached to other transfer members by a surface facing away from the resin film 10. When the protective film 40 and the resin thin film 10 are in contact with each other, the surface of the protective film 40 facing the resin thin film 10 is bonded to the resin thin film 10. Since the adhesiveness of the surface of the protective film 40 on the side facing the resin thin film 10 is greater than the adhesiveness of the surface of the protective film 40 on the side facing away from the resin thin film 10, after the protective film 40 is completely adhered to the resin thin film 10, the adhesion between the protective film 40 and the resin thin film 10 is greater than the adhesion between the protective film 40 and the transfer member, so that the protective film 40 is separated from the transfer member by itself and stably adhered to the resin thin film 10 in the process of moving the transfer member away from the resin thin film 10. Like this, through adopting the mode of pasting to transport protection film 40, can effectively guarantee protection film 40 transportation process's overall structure integrality and transportation process convenience, transport simultaneously and provide the surface of pasting for protection film 40 and can transport protection film 40, be favorable to reducing the structural requirement to transporting. In addition, because the thickness of the protective film 40 and the resin film 10 is small, the method for transferring the protective film 40 and connecting and fixing the protective film 40 and the resin film 10 by adhesion can ensure that the protective film 40 and the resin film 10 are not easily impacted by external force or rigid parts in the transferring process of the protective film 40 and the connecting process of the protective film 40 and the resin film 10, thereby reducing the possibility of structural damage of the protective film 40 and the resin film 10.
In one example, referring to fig. 5, the protective film 40 is transferred and coated on the predetermined region 101 of the resin thin film 10 by the transfer film 60. After the protective film 40 is attached to the resin thin film 10, the protective film 40 is separated from the transfer film 60. After the resin film 10 is unwound, the resin film 10 moves toward a container for storing an iodine solution. Two first press rollers 80 are provided above and below the resin film 10, respectively. The upper two first press rollers 80 are arranged at intervals in the conveying direction, and the lower two first press rollers 80 are arranged at intervals in the conveying direction and are arranged in a mirror image with the upper two first press rollers 80. The plurality of protective films 40 are disposed on the transfer film 60 at equal intervals. The protection film 40 that the transport membrane 60 of top carried the protection film 40 and the transport membrane 60 of below carried the protection film 40 each other for the mirror image to can guarantee that the protection film 40 of top and the protection film 40 of below contact with resin film 10 simultaneously and cover the upper surface and the lower surface of predetermineeing regional 101 simultaneously, improve the precision that protection film 40 covered the position. The resin film 10 and the transfer film 60 carrying the protective film 40 are passed through a gap between the upper first pressing roller 80 and the lower first pressing roller 80, so that the protective film 40 is stuck to the resin film 10 by the mutual pressing action of the upper and lower first pressing rollers 80. In the conveying direction, the two sets of first press rollers 80 perform secondary pressing on the protective film 40, thereby ensuring that the protective film 40 and the resin film 10 are firmly bonded. After passing through the two sets of first pressing rollers 80, the transfer film 60 is wound up by the wind-up rollers. Since the adhesive force between the protective film 40 and the resin film 10 is greater than the adhesive force between the protective film 40 and the transfer film 60, the protective film 40 is separated from the transfer film 60 by itself and stably attached to the resin film 10 when the transfer film 60 is wound. The transfer membrane 60 after being rolled can be reused, and the production loss is reduced. Thus, on one hand, the protective film 40 is conveyed to the preset area 101 by the mode of transferring the film 60, and the protective film 40 is adhered to the resin film 10 under the extrusion action of the first press roller 80, so that the work efficiency, the position precision and the connection reliability of the protective film 40 and the resin film 10 can be improved; on the other hand, the transfer film 60 is selected to be a film having a small elastic modulus, which is soft itself and has good deformability, so that the protective film 40 and the first pressing roller 80 can be isolated from each other without causing a rigid impact or a rigid compression to the protective film 40 and the resin film 10, thereby reducing the possibility of structural damage to the protective film 40 and the resin film 10 during the connection of the protective film 40 and the resin film 10.
After the transfer film 60 is separated from the protective film 40, the resin film 10 carrying the protective film 40 is immersed in an iodine solution and dyed. After the immersion for a predetermined period of time, the iodine solution permeates into the resin film 10 except the protective film 40 to perform dyeing, while the iodine solution does not substantially permeate into the predetermined area 101 covered with the protective film 40, so that iodine molecules are not present in the predetermined area 101. The iodine solution has volatility, and the surface of the protective film 40, which is far away from the resin film 10, can be stained with the iodine solution in the dyeing process, so that the viscosity is reduced, but after the iodine solution is volatilized, the viscosity is gradually recovered.
Referring to fig. 5, after the resin film 10 is subjected to the dyeing process, the protective film 40 is removed from the upper and lower surfaces of the resin film 10 by the adhesive release film 70. The surface of the adhesive release film 70 has adhesiveness, and the adhesiveness is greater than that of the surface of the protective film 40 facing the resin film 10.
Two second press rollers 90 are provided above and below the resin film 10, respectively. The upper two second press rollers 90 are arranged at intervals in the conveying direction, and the lower two second press rollers 90 are arranged at intervals in the conveying direction and are arranged in a mirror image with the upper two second press rollers 90. The resin film 10 and the adhesive release film 70 are passed through a gap between the upper second pressing roller 90 and the lower second pressing roller 90, so that the surface of the protective film 40 facing away from the resin film 10 is stuck to the adhesive release film 70 by the mutual pressing action of the upper and lower second pressing rollers 90. Two sets of second pressing rollers 90 form a secondary pressing, thereby ensuring that the protective film 40 and the adhesive release film 70 are firmly bonded. After passing through the two sets of second pressing rollers 90, the adhesive release film 70 is wound up by the wind-up roller. Since the adhesive force between the protective film 40 and the adhesive release film 70 is larger than the adhesive force between the protective film 40 and the resin film 10, the protective film 40 and the resin film 10 can be separated from each other when the adhesive release film 70 is wound. The recovered adhesive release film 70 and protective film 40 can be reused, reducing production loss. On one hand, the protective film 40 is removed from the preset area 101 by adopting the adhesive stripping film 70, so that the removal working efficiency of the protective film 40 is improved; on the other hand, the adhesive peeling film 7 is selected to be a film having a small elastic modulus, which is soft by itself and has good deformability, so that the protective film 40 and the resin film 10 are not rigidly impacted or pressed while the protective film 40 and the second pressing roller 90 are separated, and the possibility of structural damage occurring to the protective film 40 and the resin film 10 during the connection of the protective film 40 and the adhesive peeling film is reduced.
After the protective film 40 is removed from the resin film 10, the resin film 10 forms a polarizing plate 50 having a polarizing portion 30 and a non-polarizing portion 20. The polarizing plate 50 may be cut to an appropriate size according to product requirements.
The polarizing plate 50 may be subjected to a stretching process, a drying process, and then surface protective films may be attached to both upper and lower surfaces of the polarizing plate 50. The surface protective film can protect the polarizing plate 50. The surface protective film is releasably attached to the polarizing plate 50 by a suitable adhesive. The surface protective film may be a cellulose triacetate film.
In the method for manufacturing the polarizing plate 50 according to the embodiment of the present invention, the protective films 40 are previously disposed on the upper surface and the lower surface of the predetermined region 101 of the resin film 10 before the dyeing process, so that in the dyeing process, the protective films 40 can prevent the iodine solution from penetrating into the predetermined region 101, so that the predetermined region 101 does not contain iodine molecules and further does not have a polarization function, and the portion outside the predetermined region 101, which is not covered by the protective films 40, can be penetrated and dyed by the iodine solution to make the portion have the polarization function. Thus, by using the preparation method of the embodiment of the invention, the polarizing part 30 and the non-polarizing part 20 can be formed without damaging the whole structure of the polarizing plate 50, so that the structural integrity of the polarizing plate 50 is effectively ensured, the possibility of structural damage is reduced, and the product quality is improved. Meanwhile, in the polarizing plate 50 manufactured by the manufacturing method of the embodiment of the present invention, since iodine molecules do not exist in the non-polarizing portion 20, the influence on the light passing ability is small, which is beneficial to improving the light transmission amount and reducing the light energy attenuation.
Referring to fig. 6, an embodiment of the present invention further provides a polarizer 50. The polarizing plate 50 is manufactured by the method of manufacturing the polarizing plate 50 as in the above example. The polarizing plate 50 of the present embodiment has a non-polarizing portion 20 and a polarizing portion 30 surrounding the non-polarizing portion 20. The polarizer 50 may be applied to electronic devices such as a mobile phone, a laptop computer, or a tablet computer display screen. The non-polarizing portion 20 of the polarizing plate 50 may be disposed corresponding to the light receiving portion of the optical device X, thereby ensuring that the non-polarizing portion 20 is in the path of the incident light of the light receiving portion of the optical device X. Since the non-polarizing part 20 does not have iodine molecules and thus has no polarizing function, it is ensured that the incident light is not attenuated due to the polarization of the polarizing plate 50, which is beneficial to reducing the adverse effect of the polarizing plate 50 on the light propagation and ensuring that the light keeps good transmittance at the polarizing plate 50. The dotted line in fig. 6 is only for schematically describing the position and the boundary of the non-polarizing portion 20, and does not represent a solid structure.
Referring to fig. 7, an embodiment of the present invention further provides a display screen 100 applied to an electronic device. The display panel 100 includes a backlight module 200, a liquid crystal layer 300, an upper polarizer 400, and an optical adhesive layer 500 stacked together. The liquid crystal layer 300 and the backlight module 200 are provided with light-transmitting holes 600 for allowing light to pass therethrough. Optical Adhesive layer 500 may be formed using a transparent optical Adhesive (OCA) material. The display screen 100 also includes a cover plate 800. The optical adhesive layer 500 is disposed between the upper polarizer 400 and the cover plate 800, and the upper polarizer 400 is adhered to the cover plate 800 by the optical adhesive layer 500. The optical cement layer 500 and the cover plate 800 have light-transmitting regions that allow light to pass through. The optical adhesive layer 500 and the cover plate 800 are not provided with openings communicated with the light-transmitting holes 600. When the display screen 100 is applied to an electronic apparatus, the light receiving portion of the optical device X is disposed corresponding to the light transmission hole 600 so that light incident from the outside can reach the light receiving portion of the optical device X through the display screen 100. The upper polarizing plate 400 of this example is the polarizing plate 50 prepared by the method for preparing the polarizing plate 50 of the above example. The upper polarizer 400 covers the light transmission hole 600, and the non-polarizing portion 20 of the upper polarizer 400 corresponds to the position of the light transmission hole 600. The upper polarizer 400 is not provided with a physical opening, but is entirely of a continuous unbroken structure. The polarizing part 30 and the non-polarizing part 20 of the upper polarizer 400 are completely attached to the optical adhesive layer 500, so that the non-polarizing part 20 of the upper polarizer 400 is attached to the optical adhesive layer 500 on the premise of meeting the light transmission requirement, and the region corresponding to the light transmission hole 600 of the optical adhesive layer 500 is not in a suspended state. Thus, when the temperature experiment is performed on the display screen 100, each region of the optical adhesive layer 500 is pulled by the shrinkage of the upper polarizer 400, and the external force applied to each region of the optical adhesive layer 500 tends to be consistent, so that the possibility of the occurrence of the bubble problem due to the uneven condition of the optical adhesive layer 500 is effectively reduced, and the quality and the service durability of the display screen 100 are improved.
The display screen 100 of the embodiment of the present invention further includes a lower polarizer 700. The lower polarizer 700 of this example is a polarizer 50 prepared by the method for preparing the polarizer 50 of the above example. The lower polarizer 700 is positioned between the backlight assembly 200 and the liquid crystal layer 300. The lower polarization plate 700 covers the light transmission hole 600. The non-polarizing portion 20 of the lower polarizer 700 corresponds to the position of the light transmission hole 600.
An embodiment of the present invention further provides an electronic device, which includes the display screen 100 according to the above embodiment. The electronic device further comprises an optical device X. The optical device X is opposite to the light hole 600 of the backlight module 200 of the display screen 100, so that the light passing through the display screen 100 can reach the optical device X. The electronic device of the embodiment may be a mobile phone, a tablet computer, an electronic reader, a wearable device, a vehicle-mounted device, or the like. The optical device X may be a camera module, an ambient light sensor, a proximity light sensor, or an optical fingerprint sensor, etc.
While the invention has been described with reference to a preferred embodiment, various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention, and particularly, features shown in the various embodiments may be combined in any suitable manner without departing from the scope of the invention. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A method for producing a polarizing plate, comprising:
covering protective films on the upper surface and the lower surface of a preset area of a resin film, wherein the preset area is an area corresponding to a non-polarizing part on the resin film;
immersing the resin film covered with the protective film into an iodine solution for dyeing treatment;
the resin film was taken out from the iodine solution, and the protective film was removed, to obtain a polarizing plate including a polarizing portion and the non-polarizing portion.
2. The method of claim 1, wherein the protective film has an area larger than that of the predetermined region.
3. The method as claimed in claim 1, wherein the protective film is attached to the upper and lower surfaces of the predetermined region of the resin film.
4. The method according to claim 3, wherein the surface of the protective film has tackiness, and the tackiness of the surface of the protective film on the side facing the resin film is larger than the tackiness of the surface of the protective film on the side facing away from the resin film.
5. The method according to any one of claims 1 to 4, wherein the protective film is transferred and coated on the predetermined region of the resin thin film by a transfer film;
separating the protective film from the transfer film after the protective film is attached to the resin film.
6. The method according to any one of claims 1 to 4, wherein the protective film is removed from the upper surface and the lower surface of the predetermined region of the resin thin film by an adhesive release film.
7. A polarizing plate, comprising: the polarizing plate is produced by the method for producing a polarizing plate according to any one of claims 1 to 6.
8. A display screen applied to electronic equipment is characterized by comprising:
the liquid crystal display panel comprises a backlight module, a liquid crystal layer, an upper polarizing plate and a cover plate which are arranged in a stacked mode, wherein the upper polarizing plate is the polarizing plate according to claim 7, and an optical adhesive layer is arranged between the upper polarizing plate and the cover plate;
the liquid crystal layer and the backlight module are provided with light holes, the upper polaroid covers the light holes, and the non-polarization part of the upper polaroid corresponds to the light holes.
9. A display screen according to claim 8, further comprising a lower polarizer, wherein the lower polarizer is the polarizer according to claim 7, the lower polarizer is located between the backlight module and the liquid crystal layer, the lower polarizer covers the light-transmitting holes, and the non-polarizing portions of the lower polarizer correspond to the light-transmitting holes.
10. An electronic device characterized by comprising a display screen according to claim 8 or 9.
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| CN201910859207.7A CN110673251A (en) | 2019-09-11 | 2019-09-11 | Polarizing plate preparation method, polarizing plate, display screen and electronic equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113759457A (en) * | 2021-09-24 | 2021-12-07 | 业成科技（成都）有限公司 | Polarizer preparation method, polarizer and display device |
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