CN111415599A - Foldable quantum dot light-color conversion membrane, manufacturing method thereof and display screen - Google Patents
Foldable quantum dot light-color conversion membrane, manufacturing method thereof and display screen Download PDFInfo
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- G—PHYSICS
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- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L25/00—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof
- H01L25/16—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof the devices being of types provided for in two or more different main groups of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. forming hybrid circuits
- H01L25/167—Assemblies consisting of a plurality of individual semiconductor or other solid state devices ; Multistep manufacturing processes thereof the devices being of types provided for in two or more different main groups of groups H01L27/00 - H01L33/00, or in a single subclass of H10K, H10N, e.g. forming hybrid circuits comprising optoelectronic devices, e.g. LED, photodiodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/40—OLEDs integrated with touch screens
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Abstract
The invention discloses a foldable quantum dot light-color conversion membrane, a manufacturing method thereof and a display screen, wherein the foldable quantum dot light-color conversion membrane at least comprises a substrate, a quantum dot photoelectric conversion film and an encapsulation layer, wherein a pixel area is arranged on one side surface of the substrate, the quantum dot photoelectric conversion film is arranged on the pixel area of the substrate, the encapsulation layer completely covers the quantum dot photoelectric conversion film, and the substrate and the encapsulation layer are jointly used as a protection and insulation layer to isolate water vapor and oxygen. The chemically toughened ultrathin glass substrate is used as a protective layer of the quantum dot light-color conversion film layer, so that the quantum dot light-color conversion film has the functions ofFoldability and wide application range; SiO plating by PVD or CVD or other vacuum coating methods2The packaging effectively isolates the water, gas and oxygen from entering, so that the quantum dot light color conversion membrane is more stable and has long service life; the gravure pad printing equipment is adopted to print the three-color sub-pixel ink and the BM ink on the ultrathin glass substrate in a high-precision manner, the printing is accurate in place, the efficiency is high, the yield is high, and the manufacturing cost is low.
Description
Technical Field
The invention discloses an optical film technology, and particularly relates to a foldable quantum dot light-color conversion membrane, a manufacturing method of the membrane and a display screen with the membrane.
Background
Quantum dots (quantum dots) are semiconductor nanostructures that confine excitons in three spatial directions, and they emit light of a specific frequency by applying a certain electric field or optical pressure to the semiconductor material, and are a novel luminescent material. The emission spectrum of the quantum dot can be controlled by changing the size of the quantum dot, and the emission spectrum of the quantum dot can cover the whole visible light region by changing the size of the quantum dot and the chemical composition of the quantum dot. The quantum dots have the characteristics of wide and continuous excitation spectrum distribution, good light stability, good monochromaticity, adjustable luminescence peak wavelength, high conversion efficiency, capability of realizing the stabilization of light color (the precise regulation and control of the spectrum) and the effective promotion of the color gamut of backlight products and the like, are used for making up or replacing the defects of rare earth doped fluorescent powder in energy level distribution and luminous efficiency, have more economic advantages and application prospects, and particularly become the current research hotspot in the field of semiconductor devices.
Compared with the traditional organic fluorescent powder, the quantum dot has the advantages of adjustable light-emitting wavelength (capable of covering visible and near infrared bands), high fluorescent quantum efficiency (capable of being more than 90 percent), small particle size, high color saturation, low-price solution processing, high stability and the like, and particularly, the light-emitting diode based on the quantum dot has the advantages that the color gamut can exceed three corners of HDTV standard color.
In the existing quantum dot L ED or O L ED display panel, blue L ED/O L ED is generally adopted as a light source, and a quantum dot light-color conversion membrane is attached to the light source.
Therefore, in view of the defects of the prior art, those skilled in the art are dedicated to developing a foldable quantum dot light-color conversion film and a manufacturing method thereof to protect the quantum dot light-color conversion film.
Disclosure of Invention
The invention aims to provide a foldable quantum dot photochromic conversion membrane and a preparation method thereof, so as to enhance the protection of the quantum dot photochromic conversion membrane and realize the folding of a quantum dot packaging structure, thereby solving the problems in the background art.
The purpose of the invention is realized by the following technical scheme:
the utility model provides a collapsible quantum dot light colour conversion diaphragm, includes base plate, quantum dot photoelectric conversion membrane, encapsulated layer at least, wherein, a side of base plate is provided with the pixel region, quantum dot photoelectric conversion membrane sets up on the pixel region of base plate, the encapsulated layer covers completely on affiliated quantum dot photoelectric conversion membrane, the base plate with the encapsulated layer is as protection and insulating layer jointly, isolated aqueous vapor and oxygen.
Further, the substrate is an ultra-thin glass substrate having a thickness in the range of 30 to 150 μm.
Furthermore, the ultrathin glass substrate needs to be chemically tempered before the quantum dot photoelectric conversion film is arranged, so that the quantum dot light-color conversion film is effectively protected, and the quantum dot light-color conversion film is foldable.
Furthermore, an explosion-proof membrane is arranged on the surface of the side, opposite to the quantum dot photoelectric conversion membrane, of the ultrathin glass substrate so as to buffer impact and protect the ultrathin glass substrate.
Furthermore, the quantum dot light-color conversion film at least comprises red quantum dot sub-pixels, green quantum dot sub-pixels and transparent sub-pixels, the three color sub-pixels are horizontally and regularly arranged, and BM is arranged between every two adjacent sub-pixels; the red quantum dot sub-pixels are made of red quantum dot ink, the green quantum dot sub-pixels are made of green quantum dot ink, and the transparent sub-pixels are made of transparent ink.
Further, the packaging layer is coated with SiO on the quantum dot light-color conversion film by adopting a vacuum coating method2The material is used for packaging the quantum dot light-color conversion membrane, so that moisture and oxygen are effectively prevented from entering, the quantum dot light-color conversion membrane is more stable, and the service life is long.
Further, the vacuum coating method adopted by the packaging layer at least comprises PVD (Physical Vapor Deposition) or CVD (Chemical Vapor Deposition).
In order to realize the structure of the foldable quantum dot light-color conversion membrane, the invention also provides a method for preparing the foldable quantum dot light-color conversion membrane, which at least comprises the following steps:
step1, carrying out chemical toughening on the substrate, and printing the explosion-proof film on the surface of one side of the chemically toughened substrate to protect the substrate;
step2, printing BM ink patterns on the pixel area on the other side of the substrate, and curing the BM ink; the BM ink pattern divides the pixel region into sub-pixel target regions with different colors;
step3, printing quantum dot ink or transparent ink with corresponding colors in the sub-pixel target areas with corresponding colors, and curing the sub-pixel ink with the three colors to form a quantum dot light-color conversion film; the red quantum dot ink, the green quantum dot ink and the transparent ink are sequentially printed in corresponding target areas in any order, and after one ink is cured, the other ink is printed;
and Step4, coating SiO2 on the surface of the quantum dot light-color conversion film layer by adopting a vacuum coating method to serve as a protection and insulation layer.
Further, in Step2-Step3, the printing mode of the BM ink and the three-color sub-pixel ink is gravure printing, and the printing operation is completed by using a gravure pad printing device.
Further, in Step3, when three color sub-pixel inks are printed on the corresponding color sub-pixel target area, the color sub-pixel inks can be accurately printed in the corresponding color sub-pixel target area according to the preset sub-pixel pattern template of each color.
Further, in Step2-Step3, the curing of the BM ink and the three-color sub-pixel ink at least includes thermal curing or UV curing.
The invention provides a display module, which at least comprises the foldable quantum dot light-color conversion membrane, wherein an adhesive layer is arranged between the foldable quantum dot light-color conversion membrane and a blue light L ED/O L ED display panel to attach the foldable quantum dot light-color conversion membrane and the blue light L ED/O L ED display panel, and the blue light L ED/O L ED display panel has the same structure as the existing blue light L ED/O L ED display panel.
Further, the adhesive layer at least comprises an OCA optical cement layer or an OCR water cement layer.
The invention also provides a display screen, which at least comprises the display module with the foldable quantum dot light-color conversion membrane.
By implementing the foldable quantum dot light color conversion film, the preparation method thereof and the display screen, the foldable quantum dot light color conversion film has the following beneficial effects:
(1) in the technical scheme, the ultrathin glass substrate is used as a protective layer of the quantum dot light-color conversion film layer and is chemically toughened, and the toughened ultrathin glass substrate is used as a protective layer of the quantum dot light-color conversion film sheet, so that the quantum dot light-color conversion film layer is effectively protected, the quantum dot light-color conversion film sheet has foldability, and the quantum dot light-color conversion film sheet is particularly suitable for a quantum dot display panel with a folding or curved surface;
(2) in the technical scheme, the SiO is plated by adopting vacuum coating methods such as PVD or CVD and the like2The quantum dot light-color conversion film is used for packaging the quantum dot light-color conversion film, so that the water, gas and oxygen are effectively isolated, the quantum dot light-color conversion film is more stable, and the service life is long;
(3) according to the technical scheme, the gravure pad printing equipment is adopted to print the three-color sub-pixel ink and the BM ink on the ultrathin glass substrate in a high-precision manner, the printing is accurate in place, the efficiency is high, the yield is high, and the manufacturing cost is low.
Drawings
Fig. 1 is a schematic structural diagram of a foldable quantum dot light-color conversion film according to an embodiment of the invention;
FIG. 2 is a structural diagram of a display screen having the foldable quantum dot light color conversion film shown in FIG. 1;
FIG. 3 is a flow chart of a method for preparing a foldable quantum dot light color conversion film;
fig. 4 is a schematic structural diagram of a gravure pad printing device for preparing the foldable quantum dot photochromic switching film shown in fig. 1.
Wherein:
10. an ultra-thin glass substrate; 11. a quantum dot light-color conversion film; 110. a red quantum dot subpixel; 111. a green quantum dot subpixel; 112. a transparent sub-pixel; 12. an explosion-proof membrane; 13. SiO2 214, an adhesive layer, 15, a flexible substrate, 16, L ED/O L ED, 17, a TFE packaging layer, 18, BM ink, 19 and an electrode;
2. a gravure pad printing device; 20. an ink roller; 21. a gravure cylinder; 210. a scraper; 22. a pad printing roller; 23. cleaning the roller; 24. an ink bin; 25. and moving the carrier.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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 obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The invention provides a foldable quantum dot light-color conversion film, which at least comprises a substrate, a quantum dot photoelectric conversion film and an encapsulation layer, wherein a pixel area is arranged on one side surface of the substrate, the quantum dot photoelectric conversion film is arranged on the pixel area of the substrate, the encapsulation layer completely covers the quantum dot photoelectric conversion film, and the substrate and the encapsulation layer are jointly used as a protection and insulation layer to isolate moisture and oxygen.
As shown in fig. 1-2, the foldable quantum dot light-color conversion film structure of the embodiment of the invention is that the substrate adopts an ultra-thin glass substrate 10, the ultra-thin glass is an excellent element for manufacturing a novel foldable display screen, and the ultra-thin glass after being tempered has the foldable characteristic, german schottky corporation has started to supply flexible glass with a thickness of 25-100 microns in batch in 2013, the width is about 50cm, and the length is hundreds of meters, japanese asahi glass corporation in 2014 manufactures the flexible glass SPOO L with a thickness of 0.05 mm by a float method, chinese patent CN104045221B also discloses a preparation method of the flexible ultra-thin glass, in this embodiment, the ultra-thin glass is used as the substrate for operation, and in the solution of the invention, the thickness of the ultra-thin glass substrate 10 is required to be between 30-150 μm, preferably the ultra-thin glass substrate 10 with a thickness of about 50 microns is used, and tempering is performed, the ultra-thin glass substrate 10 needs to be chemically before the quantum dot photoelectric conversion film 11 is arranged, so that the quantum dot light-color conversion film 11 can be protected, and the quantum dot light-color conversion can.
As shown in fig. 1-2, an explosion-proof film 12 is disposed on the upper surface of the ultra-thin glass substrate 10 to cushion the impact and protect the ultra-thin glass substrate 10.
As shown in fig. 1-2, the ultra-thin glass substrate 10 has a pixel region on the lower surface thereof, and the quantum dot light-color conversion film 11 is disposed on the pixel region on the lower surface of the ultra-thin glass substrate 10.
The quantum dot light-color conversion film 11 includes at least one red quantum dot sub-pixel (R in the figure) 110, one green quantum dot sub-pixel (G in the figure) 111, and one transparent sub-pixel (T in the figure) 112, and the red quantum dot sub-pixel 110, the green quantum dot sub-pixel 111, and the transparent sub-pixel 112 are arranged in sequence as shown in the figure, and the three sub-pixels form one pixel and are sequentially and continuously arranged in sequence to form a pixel array. In practical operation, the three color sub-pixels are arranged in a regular array, the sequence of the three color sub-pixels can be changed, and the arrangement mode includes mosaic type, straight bar type, triangle type, four-Pixel type, etc., which is mainly determined by the application of the display and the shape and size of the video Electrode (Pixel Electrode). And a plurality of sub-pixels are arranged in an array manner, and BM are arranged at intervals between adjacent sub-pixels to form an integral quantum dot conversion film.
As shown, BM ink 18 is disposed between the red quantum dot subpixel 110 and the green quantum dot subpixel 111, and BM ink 18 is disposed between the green quantum dot subpixel 111 and the transparent subpixel 112; meanwhile, the BM is generally disposed at the edge of the whole pixel region, which is not shown in the figure.
As shown in fig. 1-2, in the present embodiment, the packaging layer is made of SiO2 material, and is plated on the quantum dot light-color conversion film by a vacuum coating method such as PVD (Physical Vapor Deposition) or CVD (Chemical Vapor Deposition), so as to form a SiO2 packaging layer 13, which completely covers the surface of the quantum dot light-color conversion film and is used as a package of the quantum dot light-color conversion film, so as to effectively isolate moisture and oxygen from entering, so that the quantum dot light-color conversion film is more stable and has a long service life.
As shown in fig. 2, the foldable quantum dot light-color conversion Film prepared in this embodiment is disposed on a display screen, the display screen has the same structure as a conventional display screen, and at least has a flexible substrate 15, an electrode 19 is disposed on the flexible substrate 15, and L ED/O L ED16 is disposed above the electrode 19, a TFE Encapsulation layer 17 is formed on the surfaces of L ED/O L ED16 and the electrode 19 by a Thin-Film Encapsulation (TFE) Encapsulation technology, and an SiO2 Encapsulation layer 13, which is the same as that on the quantum dot light-color conversion Film, is disposed on the surface of the TFE Encapsulation layer 17 to encapsulate elements on the flexible substrate 15, so as to prevent moisture and oxygen from entering, and L ED/O L ED is disposed under sub-pixels and corresponds to the sub-pixels one to one.
An adhesive layer 14 is arranged between the SiO2 packaging layer 13 on the flexible substrate 15 and the SiO2 packaging layer 13 of the quantum dot light-color conversion membrane, and the foldable quantum dot light-color conversion membrane is arranged on the display screen, and the adhesive layer can be realized by an OCA optical glue layer or an OCR glue layer.
In order to realize the structure of the foldable quantum dot light color conversion film, the following method is adopted, as shown in fig. 3, specifically including the following steps:
step1, cutting the ultrathin glass by laser, chemically toughening the ultrathin glass to form an ultrathin glass substrate 10, and printing an explosion-proof membrane 12 on the surface of one side of the ultrathin glass substrate 10 after chemical toughening to protect the ultrathin glass substrate 10;
step2, printing BM ink patterns on the pixel region on the other side of the ultrathin glass substrate 10 by the gravure pad printing equipment 2, and curing the BM ink 18; the BM ink pattern divides the pixel area into sub-pixel target areas with different colors;
step3, printing quantum dot ink or transparent ink with corresponding colors in the target area of the corresponding color sub-pixel, thermally curing or UV curing, and curing the ink of the three colors sub-pixel to form a quantum dot light-color conversion film; the red quantum dot ink, the green quantum dot ink and the transparent ink are sequentially printed in corresponding target areas in any order, and after one ink is cured, the other ink is printed; the specific reference sequence is:
step30, printing red quantum dot ink in the target area of the red quantum dot sub-pixel 110 by adopting the intaglio transfer printing equipment 2, accurately printing the red quantum dot ink in the target area of the red quantum dot sub-pixel 110 according to a preset red quantum dot pattern template, and curing the red quantum dot ink;
step31, printing green quantum dot ink in the target area of the green quantum dot sub-pixel 111 by adopting the gravure pad printing equipment 2, accurately printing the green quantum dot ink in the target area of the green quantum dot sub-pixel 111 according to a preset green quantum dot pattern template, and curing the green quantum dot ink;
step32, printing transparent ink on the target area of the transparent sub-pixel 112 by the intaglio transfer printing device 2, precisely printing the transparent ink on the target area of the transparent sub-pixel 112 according to a preset transparent sub-pixel pattern template, and curing the transparent ink;
step4, after the three color sub-pixel ink and the BM ink 18 are completely dried to form the quantum dot light-color conversion film, coating SiO on the surface of the quantum dot light-color conversion film by a vacuum coating method2Formation of SiO2And the packaging layer is used as a protection and insulation layer.
It is noted that in Step3, the three color sub-pixel ink printing sequence is not fixed, and one ink is cured before another ink is printed.
In Step2-Step3, the printing mode of the three-color sub-pixel ink and BM ink 18 is gravure printing, the printing operation is completed by using a gravure pad printing device 2, the gravure pad printing device 2 includes a device frame as a device support structure as shown in a diagram of fig. 4, a mobile carrier 25 is arranged on the device frame, a quantum dot light-color conversion film 11 to be operated is placed on the mobile carrier 25, a pad printing roller 22 is arranged above the mobile carrier 25, and the outer peripheral surface of the pad printing roller 22 is tangent to and closely contacted with the upper surface of the quantum dot light-color conversion film; a cleaning roller 23 is arranged on one side of the pad printing roller 22, the cleaning roller 23 is contacted with the pad printing roller 22, the rotating directions of the cleaning roller 23 and the pad printing roller 22 are opposite, and the cleaning roller 23 is used for cleaning the pad printing roller 23; an intaglio cylinder 21 is arranged above the pad printing cylinder 22, and the intaglio cylinder 21 is in rolling contact with the pad printing cylinder 22; the peripheral surface of the gravure cylinder 21 is provided with a printing template for printing; the gravure cylinder 21 is in rolling contact with the ink cylinder 20, a part of the ink cylinder 20 is immersed in the ink chamber 24, a scraper 210 is further disposed on a side surface of the gravure cylinder 21, and one side of the scraper 210 is tangent to an outer circumferential surface of the gravure cylinder 21 and forms an obtuse angle according to a rotation direction of the gravure cylinder 21. For the specific structure of the pad printing device 2, reference may be made to the description of a pad printing device for curved glass under publication No. CN209920740U, or other pad printing devices may be implemented.
In Step3, when three color sub-pixel inks are printed on the corresponding color sub-pixel target area, the color sub-pixel inks can be accurately printed in the corresponding color sub-pixel target area according to the preset color sub-pixel pattern template.
In Step2-Step3, the three-color sub-pixel ink, BM ink, is cured at least by thermal or UV curing.
A display module at least comprises the foldable quantum dot light-color conversion membrane, an adhesive layer is arranged between the foldable quantum dot light-color conversion membrane and a blue light L ED/O L ED display panel to attach the foldable quantum dot light-color conversion membrane and the blue light L ED/O L ED display panel, wherein the blue light L ED/O L ED display panel has the same structure as the existing blue light L ED/O L ED display panel, and the adhesive layer at least comprises an OCA optical adhesive layer or an OCR (optical clear adhesive) glue layer.
A display screen at least comprises the display module with the foldable quantum dot light-color conversion membrane.
The foldable quantum dot light-color conversion film is completed based on the scheme, the manufactured quantum dot light-color conversion film is attached to a blue light L ED/O L ED display panel when the display module is manufactured, when the substrate of the blue light L ED/O L ED display panel is a flexible substrate, the foldable quantum dot light-color conversion display module can be obtained, and therefore the foldable quantum dot light-color conversion display screen can be manufactured.
It should be noted that in the method for preparing the foldable quantum dot light-color conversion film according to the present embodiment, Step2, BM may also be printed by using a conventional screen printing method. The three color sub-pixels in Step3 can also be fabricated by conventional ink-jet method.
It is to be understood that unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any uses or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the present invention is not limited to the structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. The utility model provides a collapsible quantum dot photochromic conversion diaphragm which characterized in that includes base plate, quantum dot photoelectric conversion membrane, encapsulated layer at least, wherein, a side of base plate is provided with the pixel region, quantum dot photoelectric conversion membrane sets up on the pixel region of base plate, the encapsulated layer covers completely on affiliated quantum dot photoelectric conversion membrane, the base plate with the encapsulated layer is as protection and insulating layer jointly, isolated aqueous vapor and oxygen.
2. The foldable quantum dot light-color conversion film according to claim 1, wherein the substrate is an ultra-thin glass substrate having a thickness in the range of 30-150 μm; the ultrathin glass substrate needs to be chemically tempered before the quantum dot photoelectric conversion film is arranged, so that the quantum dot light-color conversion film is protected, and the quantum dot light-color conversion film is foldable.
3. The foldable quantum dot light-color conversion film according to claim 2, wherein an explosion-proof film is disposed on a surface of the ultra-thin glass substrate opposite to the quantum dot photoelectric conversion film to buffer impact and protect the ultra-thin glass substrate.
4. The foldable quantum dot light-color conversion film according to claim 1, wherein the quantum dot light-color conversion film at least comprises red quantum dot sub-pixels, green quantum dot sub-pixels and transparent sub-pixels, the three color sub-pixels are horizontally arranged regularly, and BM is arranged between two adjacent sub-pixels; the red quantum dot sub-pixels are made of red quantum dot ink, the green quantum dot sub-pixels are made of green quantum dot ink, and the transparent sub-pixels are made of transparent ink.
5. The foldable quantum dot light-color conversion film as claimed in claim 1, wherein the packaging layer is formed by coating a SiO2 material on the quantum dot light-color conversion film by a vacuum coating method, so as to isolate moisture and oxygen from entering the quantum dot light-color conversion film as a package of the quantum dot light-color conversion film; the vacuum coating method adopted by the packaging layer at least comprises PVD or CVD.
6. A method for preparing the foldable quantum dot light-color conversion membrane of any one of claims 1 to 5, which is characterized by at least comprising the following steps:
step1, carrying out chemical toughening on the substrate, and printing the explosion-proof membrane on the surface of one side of the chemically toughened substrate to protect the substrate;
step2, printing BM ink patterns on the pixel area on the other side of the substrate, and curing the BM ink; the BM ink pattern divides the pixel region into sub-pixel target regions with different colors;
step3, printing quantum dot ink or transparent ink with corresponding colors in the sub-pixel target areas with corresponding colors, and curing the sub-pixel ink with the three colors to form a quantum dot light-color conversion film;
the red quantum dot ink, the green quantum dot ink and the transparent ink are sequentially printed in corresponding target areas in any order, and after one ink is cured, the other ink is printed;
and Step4, coating SiO2 on the surface of the quantum dot light-color conversion film layer by adopting a vacuum coating method to serve as a protection and insulation layer.
7. The method for preparing a foldable quantum dot photochromic switching film as claimed in claim 6, wherein in Step2-Step3, the BM ink and the three-color sub-pixel ink are printed by gravure printing, and the printing operation is completed by a pad printing device; the curing method of the BM ink and the three-color sub-pixel ink at least comprises thermal curing or UV curing.
8. The method as claimed in claim 7, wherein in Step3, when printing three color sub-pixel inks on the corresponding color sub-pixel target area, each color sub-pixel ink can be precisely printed into the corresponding color sub-pixel target area according to the preset pattern template of each color sub-pixel.
9. A display module, characterized in that the display module at least comprises the foldable quantum dot light-color conversion film of any one of the preceding claims 1-5, an adhesive layer is arranged between the foldable quantum dot light-color conversion film and a blue light L ED/O L ED display panel to attach the two, the adhesive layer at least comprises an OCA optical cement layer or an OCR cement layer, wherein the blue light L ED/O L ED display panel has the same structure as the existing blue light L ED/O L ED display panel.
10. A display screen, wherein the display screen at least comprises the display module with the foldable quantum dot light color conversion film according to claim 9.
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| CN115083278A (en) * | 2022-06-24 | 2022-09-20 | 维沃移动通信有限公司 | Display module and electronic device |
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