CN111257989A - Polarizing film, preparation method thereof and display panel - Google Patents
Polarizing film, preparation method thereof and display panel Download PDFInfo
- Publication number
- CN111257989A CN111257989A CN202010142697.1A CN202010142697A CN111257989A CN 111257989 A CN111257989 A CN 111257989A CN 202010142697 A CN202010142697 A CN 202010142697A CN 111257989 A CN111257989 A CN 111257989A
- Authority
- CN
- China
- Prior art keywords
- quantum rod
- polarizing film
- rod polymer
- fibers
- printing device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- 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
Abstract
The application discloses a polarizing film, a preparation method thereof and a display panel, wherein the method comprises the following steps: adding the quantum rod and the flexible polymer into a solvent to obtain a uniform quantum rod polymer mixed solution; absorbing the quantum rod polymer mixed solution into a printing device, enabling the quantum rod polymer mixed solution to be sprayed out and deposited on a substrate, immediately lifting the printing device to draw the quantum rod polymer mixed solution deposited on the substrate to form quantum rod polymer fibers, moving the printing device along a first direction, stretching the quantum rod polymer fibers to form quantum rod polymer strip fibers, and finally lowering the printing device to place the quantum rod polymer strip fibers on the substrate; and carrying out hot pressing on the quantum rod polymer strip fibers to form the polarizing film. The method can obtain quantum rod film with extremely high polarization degree and uniformity, and can be used as a polarizing film of a display panel.
Description
Technical Field
The application relates to the technical field of display, in particular to a polarizing film, a preparation method thereof and a display panel.
Background
The lcd technology has the advantages of high display quality, light and thin body, low power consumption, large viewing area, low cost, etc., and is widely used in a plurality of fields such as televisions, notebook computers, mobile phones, monitors, etc. The liquid crystal display technology utilizes a backlight source to display images through a polarizer, a liquid crystal, a color film and the like, wherein the backlight source in a natural light form has 50-60% of energy loss when passing through the polarizer, so that great energy waste is caused, therefore, a light-emitting element capable of generating polarized light is developed, the transmittance and displayable brightness of the liquid crystal display are favorably and greatly improved, the brightness of the backlight source can be reduced, the product cost is further reduced, and the product quality and the market competitiveness are improved.
Researchers have found that for a single Quantum Rod (QR), its structural and dielectric anisotropy makes it optically anisotropic, i.e., polarized light emission along the long axis of the Rod, and thus Quantum Rod is a good choice of material for producing polarized light sources. The polarization of a quantum rod is closely related to the length-diameter ratio of the quantum rod, and when the length-diameter ratio is 1: 1 to 2: 1, its polarization degree is rapidly changed from 0 to 0.75, and then its aspect ratio is continuously increased, but the polarization degree is not significantly changed. Therefore, the reasonable design and development of the quantum rod structure have important significance for obtaining the quantum rod device with high polarization characteristic. And the quantum rod also has the same properties as the quantum dot, such as: the quantum rod material has the characteristics of narrow half-peak width, adjustable emission peak, large absorption cross section, high luminous efficiency and the like, and has great development prospect in the field of low-power-consumption and wide-color-gamut liquid crystal display.
At present, the oriented arrangement of quantum rods is realized by methods such as a rubbing alignment method, a photo alignment method, an electric field orientation method and the like, but the methods can obtain quantum rod orientation films with smaller size or thinner films, are not suitable for industrial production, and are difficult to meet the actual use requirements. The stretching method is convenient for realizing the large-scale production of the quantum rod film, but the problem of uneven polarization degree such as high polarization degree at the edge of the film, central polarization degree and the like exists when the film is directly stretched.
Disclosure of Invention
In order to solve the above problems, the present invention provides, in a first aspect, a method for producing a polarizing film, comprising:
s01: adding quantum rods and flexible polymers into a solvent, and stirring to obtain a uniformly dispersed quantum rod polymer mixed solution;
s02: sucking the quantum rod polymer mixed solution into a printing device, controlling the printing device to enable the quantum rod polymer mixed solution to be sprayed out and deposited on a substrate, immediately raising the printing device to draw the quantum rod polymer mixed solution deposited on the substrate to form quantum rod polymer fibers, moving the printing device along a first direction to stretch the quantum rod polymer fibers to form quantum rod polymer strip fibers, and finally lowering the printing device to place the quantum rod polymer strip fibers on the substrate;
s03: repeating the step S02 for multiple times, so that a plurality of quantum rod polymer long-strip fibers are formed on the substrate and are equidistantly arranged in parallel to the first direction; and
s04: and hot-pressing the plurality of quantum rod polymer strip fibers to form the polarizing film.
Furthermore, the mass ratio of the quantum rod to the flexible polymer is 1 (15-90).
Further, the quantum rod comprises a luminescent core and a protective shell layer coated outside the luminescent core, and the material of the luminescent core is selected from ZnCdSe2，InP，Cd2SSe，CdSe，Cd2At least one of SeTe and InAs, the material of the protective shell layer is selected from CdS, ZnSe and ZnCdS2At least one of ZnS and ZnO.
Further, the flexible polymer is selected from at least one of polymethyl methacrylate, polyethyl methacrylate, polybutyl methacrylate, polyvinyl alcohol, poly-terephthalic plastic, and epoxy resin.
Further, the diameter of the quantum rod polymer strip fiber is 100-5000 microns, and the interval width between two adjacent quantum rod polymer strip fibers is 10-20% of the diameter of the quantum rod polymer strip fiber.
Further, in S02, the printing device includes a plurality of printing nozzles arranged side by side to form a plurality of quantum rod polymer long fibers on the substrate at one time.
Further, in S04, the hot pressing process conditions include: pressing at 150-200 deg.C and 40-60 standard atmospheric pressure for 5-10 min.
Further, the quantum rod is replaced by any one of a perovskite nanorod, an inorganic nanorod, a noble metal nanorod, a colloidal nanosheet and a colloidal nanorod.
In a second aspect, the present invention also provides a polarizing film prepared by the method for preparing a polarizing film.
In a third aspect, the present invention further provides a display panel, which includes the polarizing film described above.
Has the advantages that: the invention provides a preparation method of a polarizing film, which is characterized in that a quantum rod polymer mixed solution is stretched to form quantum rod polymer strip fibers by utilizing an oriented wire drawing method, oriented arrangement of quantum rods is realized, and then the quantum rod polymer strip fibers are hot-pressed to form a uniform film, wherein the obtained film has extremely high polarization degree and uniformity, and the method is simple and convenient to operate and is beneficial to industrial production.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description 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 text flow chart of a method for preparing a polarizing film according to an embodiment of the present invention;
fig. 2A to 2F are schematic structural flow diagrams of a method for producing a polarizing film according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a printing apparatus used in a method for preparing a polarizing film according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In this application, the word "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the invention. In the following description, details are set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present invention may be practiced without these specific details. In other instances, well-known structures and processes are not shown in detail to avoid obscuring the description of the invention with unnecessary detail. Thus, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
In the conventional film stretching process, the problem of large boundary stretching ratio and small central stretching ratio exists, so that the polarization degree of the stretched film is not uniform. Meanwhile, the smaller the width of the film is, the higher the degree of polarization of the small-sized film can be obtained after the film is stretched at the same multiplying power. Therefore, the invention greatly reduces the width of the film by using a wire drawing method, thereby obtaining fibers with higher polarization degree after stretching, and the fibers are oriented and arranged on the substrate to obtain a uniform film by using a method such as hot pressing, and the like, which is described in detail later.
The embodiment of the invention provides a method for preparing a polarizing film, which is described in detail with reference to fig. 1 and fig. 2A-2F, and comprises the following steps:
s01: adding quantum rods and flexible polymers into a solvent, and stirring to obtain a uniformly dispersed quantum rod polymer mixed solution;
s02: the quantum rod polymer mixed solution is sucked into the printing device 10, and the printing device 10 is controlled to make the quantum rod polymer mixed solution 20 be ejected and deposited on the substrate 30, that is, as shown in fig. 2A,
and immediately raising the printing device 10 to draw the quantum rod polymer mixed solution 20 deposited on the substrate into a quantum rod polymer fiber 201, i.e. as shown in figure 2B,
moving the printing device 10 in a first direction to stretch the quantum rod polymer fibers 201 into quantum rod polymer elongated fibers 202, as shown in fig. 2C, wherein the substrate is rectangular in shape, and the first direction is generally parallel to any side of the rectangle,
finally, lowering the printing device 10 to place the quantum rod polymer sliver fibers 202 on the substrate 30, as shown in fig. 2D;
s03: repeating the step of S02 a plurality of times, so that a plurality of quantum rod polymer long-strip fibers 202 are formed on the substrate 30 and are arranged in parallel with the first direction at equal intervals, as shown in fig. 2E;
s04: the plurality of quantum rod polymer strip fibers 202 are hot-pressed to form a polarizing film 203, as shown in fig. 2F.
In this embodiment, the mass ratio of the quantum rod to the flexible polymer may be generally 1 (15-90) to ensure proper optical properties and tensile properties.
In this embodiment, the quantum rod includes a luminescent core and a protective shell layer covering the luminescent core, the luminescent core is made of at least one material selected from ZnCdSe2, InP, Cd2SSe, CdSe, Cd2SeTe, and InAs, and the protective shell layer is made of at least one material selected from CdS, ZnSe, ZnCdS2, ZnS, and ZnO.
In this embodiment, the flexible polymer is a stretchable polymeric material, typically selected from at least one of polymethylmethacrylate, polyethylmethacrylate, polybutylmethacrylate, polyvinyl alcohol, poly-para-terephthalate plastic, and epoxy.
In this embodiment, the diameter of the quantum rod polymer long fiber is 100-5000 microns, which depends on the size of the nozzle of the printing equipment, and although the degree of polarization obtained after stretching is higher when the fiber is thinner, the diameter of the quantum rod polymer long fiber is more preferably 1000-3000 microns in consideration of the limit of processing time. The interval width between two adjacent quantum rod polymer strip fibers depends on the diameter of the quantum rod polymer strip fibers and is 10-20% of the diameter of the quantum rod polymer strip fibers.
In this embodiment, in order to improve the production efficiency, the printing apparatus 10 may be modified to include a plurality of printing nozzles 101 arranged side by side, as shown in fig. 3, so as to form a plurality of quantum rod polymer long fibers on the substrate at one time.
In this embodiment, in S04, the hot pressing process conditions include: pressing at 150-200 deg.C and 40-60 standard atmospheric pressure for 5-10 min.
In this embodiment, before the step S04, the solvent in the quantum rod polymer long fibers is usually removed, that is, the substrate carrying the quantum rod polymer long fibers is placed in an environment at 60 ℃ for 1 hour and then placed at room temperature for one day.
In this embodiment, the substrate may be made of a plastic film selected from glass, silicon wafer, quartz wafer, and poly-p-phthalic plastic.
In this embodiment, the quantum rod may be replaced with other materials having similar optical characteristics, for example, the quantum rod may be replaced with any one of a perovskite nanorod, an inorganic nanorod, a noble metal nanorod, a colloidal nanosheet, and a colloidal nanorod.
In another embodiment of the present invention, there is provided a polarizing film prepared by the method for preparing a polarizing film as described above.
In another embodiment of the present invention, a display panel is further provided, where the display panel includes the polarizing film.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and parts that are not described in detail in a certain embodiment may refer to the above detailed descriptions of other embodiments, and are not described herein again.
The polarizing film, the method for manufacturing the same, and the display panel provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained in the present document by applying specific examples, and the above description of the embodiments is only used to help understanding the method and the core concept of the present invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A method for producing a polarizing film, comprising:
s01: adding quantum rods and flexible polymers into a solvent, and stirring to obtain a uniformly dispersed quantum rod polymer mixed solution;
s02: sucking the quantum rod polymer mixed solution into a printing device, controlling the printing device to enable the quantum rod polymer mixed solution to be sprayed out and deposited on a substrate, immediately raising the printing device to draw the quantum rod polymer mixed solution deposited on the substrate to form quantum rod polymer fibers, moving the printing device along a first direction to stretch the quantum rod polymer fibers to form quantum rod polymer strip fibers, and finally lowering the printing device to place the quantum rod polymer strip fibers on the substrate;
s03: repeating the step S02 for multiple times, so that a plurality of quantum rod polymer long-strip fibers are formed on the substrate and are equidistantly arranged in parallel to the first direction; and
s04: and hot-pressing the plurality of quantum rod polymer strip fibers to form the polarizing film.
2. The method for preparing a polarizing film according to claim 1, wherein the mass ratio of the quantum rod to the flexible polymer is 1 (15-90).
3. The method for preparing a polarizing film according to claim 1, wherein the quantum rod comprises a luminescent core and a protective shell layer coated outside the luminescent core, and the material of the luminescent core is selected from ZnCdSe2，InP，Cd2SSe，CdSe，Cd2At least one of SeTe and InAs, the material of the protective shell layer is selected from CdS, ZnSe and ZnCdS2At least one of ZnS and ZnO.
4. The method for preparing a polarizing film according to claim 1, wherein the flexible polymer is at least one selected from the group consisting of polymethyl methacrylate, polyethyl methacrylate, polybutyl methacrylate, polyvinyl alcohol, poly-p-phthalic plastic, and epoxy resin.
5. The method for preparing a polarizing film according to claim 1, wherein the diameter of the quantum rod polymer long fiber is 100-5000 μm, and the width of the gap between two adjacent quantum rod polymer long fibers is 10-20% of the diameter of the quantum rod polymer long fiber.
6. The method for preparing a polarizing film according to claim 1, wherein in S02, the printing device includes a plurality of printing nozzles arranged side by side to form a plurality of the quantum rod polymer sliver fibers on the substrate at one time.
7. The method for producing a polarizing film according to claim 1, wherein in the S04, the process conditions of the heat pressing include: pressing at 150-200 deg.C and 40-60 standard atmospheric pressure for 5-10 min.
8. The method for producing a polarizing film according to claim 1, wherein the quantum rod is replaced with any one of a perovskite nanorod, an inorganic nanorod, a noble metal nanorod, a colloidal nanosheet, and a colloidal nanorod.
9. A polarizing film produced by the method for producing a polarizing film according to any one of claims 1 to 8.
10. A display panel comprising the polarizing film according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010142697.1A CN111257989A (en) | 2020-03-04 | 2020-03-04 | Polarizing film, preparation method thereof and display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010142697.1A CN111257989A (en) | 2020-03-04 | 2020-03-04 | Polarizing film, preparation method thereof and display panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111257989A true CN111257989A (en) | 2020-06-09 |
Family
ID=70949514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010142697.1A Pending CN111257989A (en) | 2020-03-04 | 2020-03-04 | Polarizing film, preparation method thereof and display panel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111257989A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113046919A (en) * | 2021-02-06 | 2021-06-29 | 宁波工程学院 | Coated CsPbBr3Nano-rod oriented polymer fiber film and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160209706A1 (en) * | 2015-01-21 | 2016-07-21 | Japan Display Inc. | Display device |
| CN106283398A (en) * | 2016-10-26 | 2017-01-04 | 南方科技大学 | A kind of method utilizing electrostatic spinning technique to prepare quantum rod/polymer fiber film |
| US20170123127A1 (en) * | 2014-06-13 | 2017-05-04 | Merck Patent Gmbh | Mixture, nano fiber, and polarized light emissive film |
| CN107065308A (en) * | 2017-06-07 | 2017-08-18 | 深圳市华星光电技术有限公司 | Substrate comprising quantum rod film and preparation method thereof, display panel |
| CN107513304A (en) * | 2017-08-23 | 2017-12-26 | 南方科技大学 | A kind of preparation method of the fluorescence polarization film aligned based on quantum rod |
| CN109298562A (en) * | 2018-11-26 | 2019-02-01 | 昆山龙腾光电有限公司 | Quantum rod film and preparation method thereof, liquid crystal display device |
-
2020
- 2020-03-04 CN CN202010142697.1A patent/CN111257989A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20170123127A1 (en) * | 2014-06-13 | 2017-05-04 | Merck Patent Gmbh | Mixture, nano fiber, and polarized light emissive film |
| US20160209706A1 (en) * | 2015-01-21 | 2016-07-21 | Japan Display Inc. | Display device |
| CN106283398A (en) * | 2016-10-26 | 2017-01-04 | 南方科技大学 | A kind of method utilizing electrostatic spinning technique to prepare quantum rod/polymer fiber film |
| CN107065308A (en) * | 2017-06-07 | 2017-08-18 | 深圳市华星光电技术有限公司 | Substrate comprising quantum rod film and preparation method thereof, display panel |
| CN107513304A (en) * | 2017-08-23 | 2017-12-26 | 南方科技大学 | A kind of preparation method of the fluorescence polarization film aligned based on quantum rod |
| CN109298562A (en) * | 2018-11-26 | 2019-02-01 | 昆山龙腾光电有限公司 | Quantum rod film and preparation method thereof, liquid crystal display device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113046919A (en) * | 2021-02-06 | 2021-06-29 | 宁波工程学院 | Coated CsPbBr3Nano-rod oriented polymer fiber film and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9891467B2 (en) | Liquid crystal display device | |
| US20140375935A1 (en) | Organic el display element having optical stack | |
| US10054816B2 (en) | Method for improving visibility of liquid crystal display device, and liquid crystal display device using same | |
| CN105301828A (en) | Liquid crystal display device and making method thereof | |
| TWI484252B (en) | Privacy device | |
| CN110007508A (en) | Color membrane substrates, liquid crystal display panel and liquid crystal display device | |
| US9594193B2 (en) | Printing plate, scattering layer, method for fabricating the same, and display apparatus | |
| US20100151228A1 (en) | Reworkable liquid crystal film and manufacturing method thereof | |
| CN103364992A (en) | Reflection polarization brightness enhancement film and manufacturing method thereof | |
| CN111257989A (en) | Polarizing film, preparation method thereof and display panel | |
| TW201816434A (en) | Optical member | |
| CN102967962B (en) | Transparent polymer dispersed liquid crystal display device and manufacturing method and application thereof | |
| US20210271130A1 (en) | Polarization assembly and display device | |
| CN103226257B (en) | Peep-proof device | |
| CN112601992B (en) | Viewing angle compensation film, polarizing plate including the same, and display device including the same | |
| KR102315475B1 (en) | Optical member | |
| KR101987682B1 (en) | Apparatus and method for manufacturing polarizing plate, polarizing plate, and diplay device comprsing the polarizing plate | |
| TW594275B (en) | A method of enhancing contrast ratio | |
| WO2021088152A1 (en) | Display panel and preparation method thereof, and display device | |
| KR100656044B1 (en) | Optical compensation film and manufactruing method thereof | |
| CN116990897B (en) | Polarizer, preparation method thereof and display panel | |
| KR102530187B1 (en) | Polarizing plate and display device comprising the same | |
| KR102283126B1 (en) | Method for manufacturing of film for compensating viewing angle, method for manufacturing of polarizing plate, compensating viewing angle, polarizing plate and display appratus comprising same | |
| CN111221171B (en) | Display panel, display panel preparation method and display device | |
| KR102530188B1 (en) | Polarizing plate and display device comprising the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200609 |
|
| RJ01 | Rejection of invention patent application after publication |